Avoid segfault on ffmpeg "buffer flush" in mpeg12.c patch by (Wolfram Gloger <wmglo...
[libav.git] / libavcodec / mpeg12.c
CommitLineData
de6d9b64 1/*
983e3246 2 * MPEG1 codec / MPEG2 decoder
ff4ec49e 3 * Copyright (c) 2000,2001 Fabrice Bellard.
8f2ab833 4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
de6d9b64 5 *
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6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
de6d9b64 10 *
ff4ec49e 11 * This library is distributed in the hope that it will be useful,
de6d9b64 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
de6d9b64 15 *
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16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64 19 */
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20
21/**
22 * @file mpeg12.c
029911d1 23 * MPEG1/2 codec
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24 */
25
a74127c0 26//#define DEBUG
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27#include "avcodec.h"
28#include "dsputil.h"
29#include "mpegvideo.h"
30
31#include "mpeg12data.h"
32
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33//#undef NDEBUG
34//#include <assert.h>
35
d87c0267 36
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37/* Start codes. */
38#define SEQ_END_CODE 0x000001b7
39#define SEQ_START_CODE 0x000001b3
40#define GOP_START_CODE 0x000001b8
41#define PICTURE_START_CODE 0x00000100
42#define SLICE_MIN_START_CODE 0x00000101
43#define SLICE_MAX_START_CODE 0x000001af
44#define EXT_START_CODE 0x000001b5
45#define USER_START_CODE 0x000001b2
46
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47#define DC_VLC_BITS 9
48#define MV_VLC_BITS 9
49#define MBINCR_VLC_BITS 9
50#define MB_PAT_VLC_BITS 9
51#define MB_PTYPE_VLC_BITS 6
52#define MB_BTYPE_VLC_BITS 6
53#define TEX_VLC_BITS 9
54
764ef400 55#ifdef CONFIG_ENCODERS
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56static void mpeg1_encode_block(MpegEncContext *s,
57 DCTELEM *block,
58 int component);
63b15e55 59static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
764ef400 60#endif //CONFIG_ENCODERS
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61static inline int mpeg1_decode_block_inter(MpegEncContext *s,
62 DCTELEM *block,
63 int n);
64static inline int mpeg1_decode_block_intra(MpegEncContext *s,
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65 DCTELEM *block,
66 int n);
3729c912 67static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
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68 DCTELEM *block,
69 int n);
3729c912 70static inline int mpeg2_decode_block_intra(MpegEncContext *s,
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71 DCTELEM *block,
72 int n);
73static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
57489bc5 74static void exchange_uv(MpegEncContext *s);
de6d9b64 75
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76#ifdef HAVE_XVMC
77extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
78extern int XVMC_field_end(MpegEncContext *s);
a579db0c 79extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
57489bc5 80extern void XVMC_init_block(MpegEncContext *s);//set s->block
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81#endif
82
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83const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1};
84const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1};
85const enum PixelFormat pixfmt_yuv_444[]= {PIX_FMT_YUV444P,-1};
86const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
87 PIX_FMT_XVMC_MPEG2_IDCT,
88 PIX_FMT_XVMC_MPEG2_MC,
89 -1};
c442d75c 90#ifdef CONFIG_ENCODERS
30952237 91static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
0c1a9eda 92static uint8_t fcode_tab[MAX_MV*2+1];
11ce8834 93
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94static uint32_t uni_mpeg1_ac_vlc_bits[64*64*2];
95static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
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96
97/* simple include everything table for dc, first byte is bits number next 3 are code*/
98static uint32_t mpeg1_lum_dc_uni[512];
99static uint32_t mpeg1_chr_dc_uni[512];
100
101static uint8_t mpeg1_index_run[2][64];
102static int8_t mpeg1_max_level[2][64];
764ef400 103#endif //CONFIG_ENCODERS
c442d75c 104
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105static void init_2d_vlc_rl(RLTable *rl)
106{
07787186 107 int i;
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108
109 init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
110 &rl->table_vlc[0][1], 4, 2,
111 &rl->table_vlc[0][0], 4, 2);
112
113
114 rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
115 for(i=0; i<rl->vlc.table_size; i++){
116 int code= rl->vlc.table[i][0];
117 int len = rl->vlc.table[i][1];
118 int level, run;
119
120 if(len==0){ // illegal code
121 run= 65;
122 level= MAX_LEVEL;
123 }else if(len<0){ //more bits needed
124 run= 0;
125 level= code;
126 }else{
127 if(code==rl->n){ //esc
128 run= 65;
129 level= 0;
130 }else if(code==rl->n+1){ //eob
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131 run= 0;
132 level= 127;
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133 }else{
134 run= rl->table_run [code] + 1;
135 level= rl->table_level[code];
136 }
137 }
138 rl->rl_vlc[0][i].len= len;
139 rl->rl_vlc[0][i].level= level;
140 rl->rl_vlc[0][i].run= run;
141 }
142}
143
2a250222 144#ifdef CONFIG_ENCODERS
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145static void init_uni_ac_vlc(RLTable *rl, uint32_t *uni_ac_vlc_bits, uint8_t *uni_ac_vlc_len){
146 int i;
147
148 for(i=0; i<128; i++){
149 int level= i-64;
150 int run;
151 for(run=0; run<64; run++){
152 int len, bits, code;
153
154 int alevel= ABS(level);
155 int sign= (level>>31)&1;
156
157 if (alevel > rl->max_level[0][run])
158 code= 111; /*rl->n*/
159 else
160 code= rl->index_run[0][run] + alevel - 1;
161
162 if (code < 111 /* rl->n */) {
163 /* store the vlc & sign at once */
164 len= mpeg1_vlc[code][1]+1;
165 bits= (mpeg1_vlc[code][0]<<1) + sign;
166 } else {
167 len= mpeg1_vlc[111/*rl->n*/][1]+6;
168 bits= mpeg1_vlc[111/*rl->n*/][0]<<6;
169
170 bits|= run;
171 if (alevel < 128) {
172 bits<<=8; len+=8;
173 bits|= level & 0xff;
174 } else {
175 bits<<=16; len+=16;
176 bits|= level & 0xff;
177 if (level < 0) {
178 bits|= 0x8001 + level + 255;
179 } else {
180 bits|= level & 0xffff;
181 }
182 }
183 }
184
185 uni_ac_vlc_bits[UNI_AC_ENC_INDEX(run, i)]= bits;
186 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
187 }
188 }
189}
4f68b084 190
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191
192static int find_frame_rate_index(MpegEncContext *s){
193 int i;
194 int64_t dmin= INT64_MAX;
195 int64_t d;
196
197 for(i=1;i<14;i++) {
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198 int64_t n0= 1001LL/frame_rate_tab[i].den*frame_rate_tab[i].num*s->avctx->frame_rate_base;
199 int64_t n1= 1001LL*s->avctx->frame_rate;
2c492e94 200 if(s->avctx->strict_std_compliance >= 0 && i>=9) break;
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201
202 d = ABS(n0 - n1);
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203 if(d < dmin){
204 dmin=d;
205 s->frame_rate_index= i;
206 }
207 }
208 if(dmin)
209 return -1;
210 else
211 return 0;
212}
213
214static int encode_init(AVCodecContext *avctx)
215{
216 MpegEncContext *s = avctx->priv_data;
217
218 if(MPV_encode_init(avctx) < 0)
219 return -1;
220
221 if(find_frame_rate_index(s) < 0){
222 if(s->strict_std_compliance >=0){
223 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 doesnt support %d/%d fps\n", avctx->frame_rate, avctx->frame_rate_base);
224 return -1;
225 }else{
226 av_log(avctx, AV_LOG_INFO, "MPEG1/2 doesnt support %d/%d fps, there may be AV sync issues\n", avctx->frame_rate, avctx->frame_rate_base);
227 }
228 }
229
230 return 0;
231}
232
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233static void put_header(MpegEncContext *s, int header)
234{
235 align_put_bits(&s->pb);
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236 put_bits(&s->pb, 16, header>>16);
237 put_bits(&s->pb, 16, header&0xFFFF);
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238}
239
240/* put sequence header if needed */
241static void mpeg1_encode_sequence_header(MpegEncContext *s)
242{
243 unsigned int vbv_buffer_size;
d78647e8 244 unsigned int fps, v;
7906085f 245 int i;
0c1a9eda 246 uint64_t time_code;
426b8061 247 float best_aspect_error= 1E10;
5ff85f1d 248 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
98b0858e 249 int constraint_parameter_flag;
426b8061 250
5ff85f1d 251 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
de6d9b64 252
1e491e29 253 if (s->current_picture.key_frame) {
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254 AVRational framerate= frame_rate_tab[s->frame_rate_index];
255
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256 /* mpeg1 header repeated every gop */
257 put_header(s, SEQ_START_CODE);
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258
259 put_bits(&s->pb, 12, s->width);
260 put_bits(&s->pb, 12, s->height);
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261
262 for(i=1; i<15; i++){
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263 float error= aspect_ratio;
264 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
f259747b 265 error-= 1.0/mpeg1_aspect[i];
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266 else
267 error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
268
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269 error= ABS(error);
270
271 if(error < best_aspect_error){
272 best_aspect_error= error;
273 s->aspect_ratio_info= i;
274 }
275 }
276
277 put_bits(&s->pb, 4, s->aspect_ratio_info);
de6d9b64 278 put_bits(&s->pb, 4, s->frame_rate_index);
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279
280 if(s->avctx->rc_max_rate){
281 v = (s->avctx->rc_max_rate + 399) / 400;
282 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
283 v = 0x3ffff;
284 }else{
285 v= 0x3FFFF;
286 }
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287
288 if(s->avctx->rc_buffer_size)
289 vbv_buffer_size = s->avctx->rc_buffer_size;
290 else
291 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
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292 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
293 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
294
295 put_bits(&s->pb, 18, v & 0x3FFFF);
296 put_bits(&s->pb, 1, 1); /* marker */
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297 put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
298
299 constraint_parameter_flag=
300 s->width <= 768 && s->height <= 576 &&
301 s->mb_width * s->mb_height <= 396 &&
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302 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
303 framerate.num <= framerate.den*30 &&
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304 vbv_buffer_size <= 20 &&
305 v <= 1856000/400 &&
306 s->codec_id == CODEC_ID_MPEG1VIDEO;
307
308 put_bits(&s->pb, 1, constraint_parameter_flag);
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309
310 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
311 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
de6d9b64 312
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313 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
314 put_header(s, EXT_START_CODE);
315 put_bits(&s->pb, 4, 1); //seq ext
316 put_bits(&s->pb, 1, 0); //esc
317 put_bits(&s->pb, 3, 4); //profile
318 put_bits(&s->pb, 4, 8); //level
3ab5b8cc 319 put_bits(&s->pb, 1, s->progressive_sequence);
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320 put_bits(&s->pb, 2, 1); //chroma format 4:2:0
321 put_bits(&s->pb, 2, 0); //horizontal size ext
322 put_bits(&s->pb, 2, 0); //vertical size ext
323 put_bits(&s->pb, 12, v>>18); //bitrate ext
324 put_bits(&s->pb, 1, 1); //marker
325 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
326 put_bits(&s->pb, 1, s->low_delay);
327 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
328 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
329 }
330
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331 put_header(s, GOP_START_CODE);
332 put_bits(&s->pb, 1, 0); /* do drop frame */
333 /* time code : we must convert from the real frame rate to a
334 fake mpeg frame rate in case of low frame rate */
8d52ec7e 335 fps = (framerate.num + framerate.den/2)/ framerate.den;
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336 time_code = s->current_picture_ptr->coded_picture_number;
337
338 s->gop_picture_number = time_code;
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339 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
340 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
de6d9b64 341 put_bits(&s->pb, 1, 1);
0c1a9eda 342 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
b1b8f9fc 343 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
303e50e6 344 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
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345 put_bits(&s->pb, 1, 0); /* broken link */
346 }
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347}
348
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349static inline void encode_mb_skip_run(MpegEncContext *s, int run){
350 while (run >= 33) {
351 put_bits(&s->pb, 11, 0x008);
352 run -= 33;
353 }
354 put_bits(&s->pb, mbAddrIncrTable[run][1],
355 mbAddrIncrTable[run][0]);
356}
764ef400 357#endif //CONFIG_ENCODERS
de6d9b64 358
8f8402e4 359static void common_init(MpegEncContext *s)
de6d9b64 360{
a6b9ffbf 361
8f8402e4 362 s->y_dc_scale_table=
bf266e19 363 s->c_dc_scale_table= mpeg2_dc_scale_table[s->intra_dc_precision];
8fe2c60e 364
8f8402e4 365}
f004ca1c 366
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367void ff_mpeg1_clean_buffers(MpegEncContext *s){
368 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
369 s->last_dc[1] = s->last_dc[0];
370 s->last_dc[2] = s->last_dc[0];
371 memset(s->last_mv, 0, sizeof(s->last_mv));
372}
373
7604246d 374#ifdef CONFIG_ENCODERS
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375
376void ff_mpeg1_encode_slice_header(MpegEncContext *s){
377 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
378 put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
379 put_bits(&s->pb, 1, 0); /* slice extra information */
380}
381
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382void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
383{
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384 mpeg1_encode_sequence_header(s);
385
386 /* mpeg1 picture header */
387 put_header(s, PICTURE_START_CODE);
388 /* temporal reference */
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389
390 // RAL: s->picture_number instead of s->fake_picture_number
391 put_bits(&s->pb, 10, (s->picture_number -
de6d9b64 392 s->gop_picture_number) & 0x3ff);
de6d9b64 393 put_bits(&s->pb, 3, s->pict_type);
d60a8f85 394
fe455f33 395 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
d60a8f85 396 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
de6d9b64 397
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398 // RAL: Forward f_code also needed for B frames
399 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
de6d9b64 400 put_bits(&s->pb, 1, 0); /* half pel coordinates */
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401 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
402 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
403 else
404 put_bits(&s->pb, 3, 7); /* forward_f_code */
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405 }
406
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407 // RAL: Backward f_code necessary for B frames
408 if (s->pict_type == B_TYPE) {
409 put_bits(&s->pb, 1, 0); /* half pel coordinates */
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410 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
411 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
412 else
413 put_bits(&s->pb, 3, 7); /* backward_f_code */
029911d1 414 }
63b15e55 415
de6d9b64 416 put_bits(&s->pb, 1, 0); /* extra bit picture */
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417
418 s->frame_pred_frame_dct = 1;
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419 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
420 put_header(s, EXT_START_CODE);
421 put_bits(&s->pb, 4, 8); //pic ext
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422 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
423 put_bits(&s->pb, 4, s->f_code);
424 put_bits(&s->pb, 4, s->f_code);
425 }else{
426 put_bits(&s->pb, 8, 255);
427 }
428 if (s->pict_type == B_TYPE) {
429 put_bits(&s->pb, 4, s->b_code);
430 put_bits(&s->pb, 4, s->b_code);
431 }else{
432 put_bits(&s->pb, 8, 255);
433 }
029911d1 434 put_bits(&s->pb, 2, s->intra_dc_precision);
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435
436 assert(s->picture_structure == PICT_FRAME);
437 put_bits(&s->pb, 2, s->picture_structure);
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438 if (s->progressive_sequence) {
439 put_bits(&s->pb, 1, 0); /* no repeat */
440 } else {
441 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
442 }
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443 /* XXX: optimize the generation of this flag with entropy
444 measures */
445 s->frame_pred_frame_dct = s->progressive_sequence;
446
447 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
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448 put_bits(&s->pb, 1, s->concealment_motion_vectors);
449 put_bits(&s->pb, 1, s->q_scale_type);
450 put_bits(&s->pb, 1, s->intra_vlc_format);
451 put_bits(&s->pb, 1, s->alternate_scan);
452 put_bits(&s->pb, 1, s->repeat_first_field);
453 put_bits(&s->pb, 1, s->chroma_420_type=1);
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454 s->progressive_frame = s->progressive_sequence;
455 put_bits(&s->pb, 1, s->progressive_frame);
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456 put_bits(&s->pb, 1, 0); //composite_display_flag
457 }
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458 if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
459 int i;
460
461 put_header(s, USER_START_CODE);
462 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
463 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
464 }
465 }
029911d1 466
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467 s->mb_y=0;
468 ff_mpeg1_encode_slice_header(s);
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469}
470
3ab5b8cc 471static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
bb198e19 472 int has_mv, int field_motion)
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473{
474 put_bits(&s->pb, n, bits);
475 if (!s->frame_pred_frame_dct) {
476 if (has_mv)
bb198e19 477 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
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478 put_bits(&s->pb, 1, s->interlaced_dct);
479 }
480}
481
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482void mpeg1_encode_mb(MpegEncContext *s,
483 DCTELEM block[6][64],
484 int motion_x, int motion_y)
485{
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486 int i, cbp;
487 const int mb_x = s->mb_x;
488 const int mb_y = s->mb_y;
489 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
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490
491 /* compute cbp */
492 cbp = 0;
493 for(i=0;i<6;i++) {
494 if (s->block_last_index[i] >= 0)
495 cbp |= 1 << (5 - i);
496 }
bb198e19 497
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498 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
499 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
500 ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
63b15e55
MN
501 (s->pict_type == B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
502 ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
9b8709d1 503 s->mb_skip_run++;
d87c0267 504 s->qscale -= s->dquant;
49733979
MN
505 s->skip_count++;
506 s->misc_bits++;
507 s->last_bits++;
bb198e19
MN
508 if(s->pict_type == P_TYPE){
509 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
510 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
511 }
de6d9b64 512 } else {
9b8709d1
MN
513 if(first_mb){
514 assert(s->mb_skip_run == 0);
515 encode_mb_skip_run(s, s->mb_x);
516 }else{
517 encode_mb_skip_run(s, s->mb_skip_run);
de6d9b64 518 }
de6d9b64
FB
519
520 if (s->pict_type == I_TYPE) {
d87c0267 521 if(s->dquant && cbp){
bb198e19 522 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
d87c0267
MN
523 put_bits(&s->pb, 5, s->qscale);
524 }else{
bb198e19 525 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
d87c0267
MN
526 s->qscale -= s->dquant;
527 }
49733979
MN
528 s->misc_bits+= get_bits_diff(s);
529 s->i_count++;
63b15e55
MN
530 } else if (s->mb_intra) {
531 if(s->dquant && cbp){
bb198e19 532 put_mb_modes(s, 6, 0x01, 0, 0);
63b15e55
MN
533 put_bits(&s->pb, 5, s->qscale);
534 }else{
bb198e19 535 put_mb_modes(s, 5, 0x03, 0, 0);
63b15e55
MN
536 s->qscale -= s->dquant;
537 }
538 s->misc_bits+= get_bits_diff(s);
539 s->i_count++;
bb198e19 540 memset(s->last_mv, 0, sizeof(s->last_mv));
63b15e55 541 } else if (s->pict_type == P_TYPE) {
bb198e19 542 if(s->mv_type == MV_TYPE_16X16){
de6d9b64 543 if (cbp != 0) {
bb198e19 544 if ((motion_x|motion_y) == 0) {
d87c0267 545 if(s->dquant){
bb198e19 546 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
d87c0267
MN
547 put_bits(&s->pb, 5, s->qscale);
548 }else{
bb198e19 549 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
d87c0267 550 }
49733979 551 s->misc_bits+= get_bits_diff(s);
de6d9b64 552 } else {
d87c0267 553 if(s->dquant){
bb198e19 554 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
d87c0267
MN
555 put_bits(&s->pb, 5, s->qscale);
556 }else{
bb198e19 557 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
d87c0267 558 }
49733979 559 s->misc_bits+= get_bits_diff(s);
63b15e55
MN
560 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
561 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
49733979 562 s->mv_bits+= get_bits_diff(s);
de6d9b64
FB
563 }
564 } else {
565 put_bits(&s->pb, 3, 1); /* motion only */
3ab5b8cc
FB
566 if (!s->frame_pred_frame_dct)
567 put_bits(&s->pb, 2, 2); /* motion_type: frame */
bb198e19 568 s->misc_bits+= get_bits_diff(s);
63b15e55
MN
569 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
570 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
d87c0267 571 s->qscale -= s->dquant;
49733979 572 s->mv_bits+= get_bits_diff(s);
de6d9b64 573 }
bb198e19
MN
574 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
575 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
576 }else{
577 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
578
579 if (cbp) {
580 if(s->dquant){
581 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
582 put_bits(&s->pb, 5, s->qscale);
583 }else{
584 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
63b15e55 585 }
bb198e19
MN
586 } else {
587 put_bits(&s->pb, 3, 1); /* motion only */
588 put_bits(&s->pb, 2, 1); /* motion_type: field */
63b15e55 589 s->qscale -= s->dquant;
bb198e19
MN
590 }
591 s->misc_bits+= get_bits_diff(s);
592 for(i=0; i<2; i++){
593 put_bits(&s->pb, 1, s->field_select[0][i]);
594 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
595 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
596 s->last_mv[0][i][0]= s->mv[0][i][0];
597 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
598 }
599 s->mv_bits+= get_bits_diff(s);
600 }
601 if(cbp)
461cd5bf 602 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
bb198e19
MN
603 s->f_count++;
604 } else{
605 static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
606
607 if(s->mv_type == MV_TYPE_16X16){
608 if (cbp){ // With coded bloc pattern
609 if (s->dquant) {
610 if(s->mv_dir == MV_DIR_FORWARD)
611 put_mb_modes(s, 6, 3, 1, 0);
612 else
613 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
614 put_bits(&s->pb, 5, s->qscale);
615 } else {
616 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
617 }
618 }else{ // No coded bloc pattern
619 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
620 if (!s->frame_pred_frame_dct)
621 put_bits(&s->pb, 2, 2); /* motion_type: frame */
622 s->qscale -= s->dquant;
623 }
624 s->misc_bits += get_bits_diff(s);
625 if (s->mv_dir&MV_DIR_FORWARD){
626 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
627 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
628 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
629 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
630 s->f_count++;
631 }
632 if (s->mv_dir&MV_DIR_BACKWARD){
633 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
634 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
635 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
636 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
637 s->b_count++;
638 }
639 }else{
640 assert(s->mv_type == MV_TYPE_FIELD);
641 assert(!s->frame_pred_frame_dct);
642 if (cbp){ // With coded bloc pattern
643 if (s->dquant) {
644 if(s->mv_dir == MV_DIR_FORWARD)
645 put_mb_modes(s, 6, 3, 1, 1);
646 else
647 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
648 put_bits(&s->pb, 5, s->qscale);
649 } else {
650 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
63b15e55 651 }
bb198e19
MN
652 }else{ // No coded bloc pattern
653 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
654 put_bits(&s->pb, 2, 1); /* motion_type: field */
655 s->qscale -= s->dquant;
656 }
657 s->misc_bits += get_bits_diff(s);
658 if (s->mv_dir&MV_DIR_FORWARD){
659 for(i=0; i<2; i++){
660 put_bits(&s->pb, 1, s->field_select[0][i]);
661 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
662 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
663 s->last_mv[0][i][0]= s->mv[0][i][0];
664 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
665 }
666 s->f_count++;
667 }
668 if (s->mv_dir&MV_DIR_BACKWARD){
669 for(i=0; i<2; i++){
670 put_bits(&s->pb, 1, s->field_select[1][i]);
671 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
672 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
673 s->last_mv[1][i][0]= s->mv[1][i][0];
674 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
675 }
676 s->b_count++;
677 }
de6d9b64 678 }
bb198e19
MN
679 s->mv_bits += get_bits_diff(s);
680 if(cbp)
461cd5bf 681 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
bb198e19 682 }
de6d9b64
FB
683 for(i=0;i<6;i++) {
684 if (cbp & (1 << (5 - i))) {
685 mpeg1_encode_block(s, block[i], i);
686 }
687 }
9b8709d1 688 s->mb_skip_run = 0;
49733979
MN
689 if(s->mb_intra)
690 s->i_tex_bits+= get_bits_diff(s);
691 else
692 s->p_tex_bits+= get_bits_diff(s);
de6d9b64 693 }
de6d9b64
FB
694}
695
63b15e55
MN
696// RAL: Parameter added: f_or_b_code
697static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
de6d9b64 698{
0ff93477 699 int code, bit_size, l, bits, range, sign;
de6d9b64
FB
700
701 if (val == 0) {
702 /* zero vector */
703 code = 0;
704 put_bits(&s->pb,
705 mbMotionVectorTable[0][1],
706 mbMotionVectorTable[0][0]);
707 } else {
63b15e55 708 bit_size = f_or_b_code - 1;
de6d9b64
FB
709 range = 1 << bit_size;
710 /* modulo encoding */
0ff93477
MN
711 l= INT_BIT - 5 - bit_size;
712 val= (val<<l)>>l;
de6d9b64
FB
713
714 if (val >= 0) {
715 val--;
716 code = (val >> bit_size) + 1;
717 bits = val & (range - 1);
718 sign = 0;
719 } else {
720 val = -val;
721 val--;
722 code = (val >> bit_size) + 1;
723 bits = val & (range - 1);
724 sign = 1;
725 }
63b15e55
MN
726
727 assert(code > 0 && code <= 16);
728
de6d9b64
FB
729 put_bits(&s->pb,
730 mbMotionVectorTable[code][1],
731 mbMotionVectorTable[code][0]);
63b15e55 732
de6d9b64
FB
733 put_bits(&s->pb, 1, sign);
734 if (bit_size > 0) {
735 put_bits(&s->pb, bit_size, bits);
736 }
737 }
738}
739
8f8402e4 740void ff_mpeg1_encode_init(MpegEncContext *s)
11ce8834
MN
741{
742 static int done=0;
8f8402e4
MN
743
744 common_init(s);
745
11ce8834
MN
746 if(!done){
747 int f_code;
748 int mv;
8f8402e4 749 int i;
11ce8834
MN
750
751 done=1;
8f8402e4 752 init_rl(&rl_mpeg1);
c442d75c 753
8f8402e4
MN
754 for(i=0; i<64; i++)
755 {
756 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
757 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
758 }
c442d75c
MN
759
760 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
8f8402e4
MN
761
762 /* build unified dc encoding tables */
763 for(i=-255; i<256; i++)
764 {
765 int adiff, index;
766 int bits, code;
767 int diff=i;
768
769 adiff = ABS(diff);
770 if(diff<0) diff--;
8aedc51d 771 index = av_log2(2*adiff);
8f8402e4
MN
772
773 bits= vlc_dc_lum_bits[index] + index;
774 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
775 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
776
777 bits= vlc_dc_chroma_bits[index] + index;
778 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
779 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
780 }
781
30952237
MN
782 mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
783
11ce8834
MN
784 for(f_code=1; f_code<=MAX_FCODE; f_code++){
785 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
786 int len;
787
788 if(mv==0) len= mbMotionVectorTable[0][1];
789 else{
790 int val, bit_size, range, code;
791
7813d6a3 792 bit_size = f_code - 1;
11ce8834
MN
793 range = 1 << bit_size;
794
795 val=mv;
796 if (val < 0)
797 val = -val;
798 val--;
799 code = (val >> bit_size) + 1;
800 if(code<17){
801 len= mbMotionVectorTable[code][1] + 1 + bit_size;
802 }else{
803 len= mbMotionVectorTable[16][1] + 2 + bit_size;
804 }
805 }
806
807 mv_penalty[f_code][mv+MAX_MV]= len;
808 }
809 }
810
811
812 for(f_code=MAX_FCODE; f_code>0; f_code--){
813 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
814 fcode_tab[mv+MAX_MV]= f_code;
815 }
816 }
817 }
1457ab52 818 s->me.mv_penalty= mv_penalty;
11ce8834 819 s->fcode_tab= fcode_tab;
029911d1
MN
820 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
821 s->min_qcoeff=-255;
822 s->max_qcoeff= 255;
823 }else{
824 s->min_qcoeff=-2047;
825 s->max_qcoeff= 2047;
826 }
c442d75c 827 s->intra_ac_vlc_length=
e5021fff
MN
828 s->inter_ac_vlc_length=
829 s->intra_ac_vlc_last_length=
830 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
11ce8834 831}
8f8402e4 832
de6d9b64
FB
833static inline void encode_dc(MpegEncContext *s, int diff, int component)
834{
bf266e19
MN
835 if(((unsigned) (diff+255)) >= 511){
836 int index;
837
838 if(diff<0){
839 index= av_log2_16bit(-2*diff);
840 diff--;
841 }else{
842 index= av_log2_16bit(2*diff);
843 }
844 if (component == 0) {
845 put_bits(
846 &s->pb,
847 vlc_dc_lum_bits[index] + index,
848 (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
849 }else{
850 put_bits(
851 &s->pb,
852 vlc_dc_chroma_bits[index] + index,
853 (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
854 }
855 }else{
de6d9b64 856 if (component == 0) {
f004ca1c
MN
857 put_bits(
858 &s->pb,
859 mpeg1_lum_dc_uni[diff+255]&0xFF,
860 mpeg1_lum_dc_uni[diff+255]>>8);
de6d9b64 861 } else {
f004ca1c
MN
862 put_bits(
863 &s->pb,
864 mpeg1_chr_dc_uni[diff+255]&0xFF,
865 mpeg1_chr_dc_uni[diff+255]>>8);
de6d9b64 866 }
bf266e19 867 }
de6d9b64
FB
868}
869
870static void mpeg1_encode_block(MpegEncContext *s,
871 DCTELEM *block,
872 int n)
873{
874 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
875 int code, component;
80feb2a2 876// RLTable *rl = &rl_mpeg1;
de6d9b64
FB
877
878 last_index = s->block_last_index[n];
879
880 /* DC coef */
881 if (s->mb_intra) {
882 component = (n <= 3 ? 0 : n - 4 + 1);
883 dc = block[0]; /* overflow is impossible */
884 diff = dc - s->last_dc[component];
885 encode_dc(s, diff, component);
886 s->last_dc[component] = dc;
887 i = 1;
029911d1
MN
888/*
889 if (s->intra_vlc_format)
890 rl = &rl_mpeg2;
891 else
892 rl = &rl_mpeg1;
893*/
de6d9b64
FB
894 } else {
895 /* encode the first coefficient : needs to be done here because
896 it is handled slightly differently */
897 level = block[0];
898 if (abs(level) == 1) {
0c1a9eda 899 code = ((uint32_t)level >> 31); /* the sign bit */
de6d9b64
FB
900 put_bits(&s->pb, 2, code | 0x02);
901 i = 1;
902 } else {
903 i = 0;
904 last_non_zero = -1;
905 goto next_coef;
906 }
907 }
908
909 /* now quantify & encode AC coefs */
910 last_non_zero = i - 1;
80feb2a2 911
de6d9b64 912 for(;i<=last_index;i++) {
2ad1516a 913 j = s->intra_scantable.permutated[i];
de6d9b64
FB
914 level = block[j];
915 next_coef:
916#if 0
917 if (level != 0)
918 dprintf("level[%d]=%d\n", i, level);
919#endif
920 /* encode using VLC */
921 if (level != 0) {
922 run = i - last_non_zero - 1;
2ad1516a
MN
923
924 alevel= level;
925 MASK_ABS(sign, alevel)
926 sign&=1;
927
80feb2a2 928// code = get_rl_index(rl, 0, run, alevel);
c442d75c 929 if (alevel <= mpeg1_max_level[0][run]){
80feb2a2 930 code= mpeg1_index_run[0][run] + alevel - 1;
80feb2a2
MN
931 /* store the vlc & sign at once */
932 put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
de6d9b64 933 } else {
80feb2a2
MN
934 /* escape seems to be pretty rare <5% so i dont optimize it */
935 put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
de6d9b64
FB
936 /* escape: only clip in this case */
937 put_bits(&s->pb, 6, run);
029911d1
MN
938 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
939 if (alevel < 128) {
940 put_bits(&s->pb, 8, level & 0xff);
de6d9b64 941 } else {
029911d1
MN
942 if (level < 0) {
943 put_bits(&s->pb, 16, 0x8001 + level + 255);
944 } else {
945 put_bits(&s->pb, 16, level & 0xffff);
946 }
de6d9b64 947 }
029911d1
MN
948 }else{
949 put_bits(&s->pb, 12, level & 0xfff);
de6d9b64
FB
950 }
951 }
952 last_non_zero = i;
953 }
954 }
955 /* end of block */
956 put_bits(&s->pb, 2, 0x2);
957}
7604246d 958#endif //CONFIG_ENCODERS
de6d9b64
FB
959
960/******************************************/
961/* decoding */
962
963static VLC dc_lum_vlc;
964static VLC dc_chroma_vlc;
965static VLC mv_vlc;
966static VLC mbincr_vlc;
967static VLC mb_ptype_vlc;
968static VLC mb_btype_vlc;
969static VLC mb_pat_vlc;
970
7906085f 971static void init_vlcs(void)
de6d9b64
FB
972{
973 static int done = 0;
974
975 if (!done) {
915bbac6 976 done = 1;
de6d9b64 977
9ac7ecd6 978 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
de6d9b64
FB
979 vlc_dc_lum_bits, 1, 1,
980 vlc_dc_lum_code, 2, 2);
9ac7ecd6 981 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
de6d9b64
FB
982 vlc_dc_chroma_bits, 1, 1,
983 vlc_dc_chroma_code, 2, 2);
8ed2ddb2 984 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
de6d9b64
FB
985 &mbMotionVectorTable[0][1], 2, 1,
986 &mbMotionVectorTable[0][0], 2, 1);
9c00c3af 987 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
de6d9b64
FB
988 &mbAddrIncrTable[0][1], 2, 1,
989 &mbAddrIncrTable[0][0], 2, 1);
461cd5bf 990 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
de6d9b64
FB
991 &mbPatTable[0][1], 2, 1,
992 &mbPatTable[0][0], 2, 1);
993
7bc9090a 994 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
de6d9b64
FB
995 &table_mb_ptype[0][1], 2, 1,
996 &table_mb_ptype[0][0], 2, 1);
7bc9090a 997 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
de6d9b64
FB
998 &table_mb_btype[0][1], 2, 1,
999 &table_mb_btype[0][0], 2, 1);
1000 init_rl(&rl_mpeg1);
1001 init_rl(&rl_mpeg2);
4f68b084
MN
1002
1003 init_2d_vlc_rl(&rl_mpeg1);
1004 init_2d_vlc_rl(&rl_mpeg2);
de6d9b64
FB
1005 }
1006}
1007
1008static inline int get_dmv(MpegEncContext *s)
1009{
612476ef
A
1010 if(get_bits1(&s->gb))
1011 return 1 - (get_bits1(&s->gb) << 1);
de6d9b64
FB
1012 else
1013 return 0;
1014}
1015
0ee50938
FB
1016static inline int get_qscale(MpegEncContext *s)
1017{
7062fad6 1018 int qscale = get_bits(&s->gb, 5);
51929fd3
MN
1019 if (s->q_scale_type) {
1020 return non_linear_qscale[qscale];
1021 } else {
1022 return qscale << 1;
0ee50938 1023 }
0ee50938
FB
1024}
1025
de6d9b64
FB
1026/* motion type (for mpeg2) */
1027#define MT_FIELD 1
1028#define MT_FRAME 2
1029#define MT_16X8 2
1030#define MT_DMV 3
1031
1032static int mpeg_decode_mb(MpegEncContext *s,
5e5c247a 1033 DCTELEM block[12][64])
de6d9b64 1034{
d2975f8d 1035 int i, j, k, cbp, val, mb_type, motion_type;
715731a3
IK
1036 const int mb_block_count = 4 + (1<< s->chroma_format)
1037
de6d9b64
FB
1038 dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1039
f943e138
MN
1040 assert(s->mb_skiped==0);
1041
9b8709d1 1042 if (s->mb_skip_run-- != 0) {
7bc9090a 1043 if(s->pict_type == I_TYPE){
9b879566 1044 av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
7bc9090a
MN
1045 return -1;
1046 }
1047
de6d9b64
FB
1048 /* skip mb */
1049 s->mb_intra = 0;
5e5c247a 1050 for(i=0;i<12;i++)
de6d9b64 1051 s->block_last_index[i] = -1;
4c9544d0
MN
1052 if(s->picture_structure == PICT_FRAME)
1053 s->mv_type = MV_TYPE_16X16;
1054 else
1055 s->mv_type = MV_TYPE_FIELD;
de6d9b64
FB
1056 if (s->pict_type == P_TYPE) {
1057 /* if P type, zero motion vector is implied */
1058 s->mv_dir = MV_DIR_FORWARD;
1059 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1060 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
25ed7f92 1061 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
4c9544d0 1062 s->field_select[0][0]= s->picture_structure - 1;
f943e138 1063 s->mb_skiped = 1;
7bc9090a 1064 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
de6d9b64
FB
1065 } else {
1066 /* if B type, reuse previous vectors and directions */
1067 s->mv[0][0][0] = s->last_mv[0][0][0];
1068 s->mv[0][0][1] = s->last_mv[0][0][1];
1069 s->mv[1][0][0] = s->last_mv[1][0][0];
1070 s->mv[1][0][1] = s->last_mv[1][0][1];
f943e138 1071
7bc9090a
MN
1072 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1073 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
1074// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1075
f943e138
MN
1076 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1077 s->mb_skiped = 1;
de6d9b64 1078 }
59b571c1 1079
de6d9b64
FB
1080 return 0;
1081 }
1082
1083 switch(s->pict_type) {
1084 default:
1085 case I_TYPE:
612476ef 1086 if (get_bits1(&s->gb) == 0) {
e94bc100 1087 if (get_bits1(&s->gb) == 0){
9b879566 1088 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
de6d9b64 1089 return -1;
e94bc100 1090 }
7bc9090a 1091 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
de6d9b64 1092 } else {
7bc9090a 1093 mb_type = MB_TYPE_INTRA;
de6d9b64
FB
1094 }
1095 break;
1096 case P_TYPE:
8ed2ddb2 1097 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
9ac7ecd6 1098 if (mb_type < 0){
9b879566 1099 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
de6d9b64 1100 return -1;
9ac7ecd6 1101 }
7bc9090a 1102 mb_type = ptype2mb_type[ mb_type ];
de6d9b64
FB
1103 break;
1104 case B_TYPE:
8ed2ddb2 1105 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
9ac7ecd6 1106 if (mb_type < 0){
9b879566 1107 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
de6d9b64 1108 return -1;
9ac7ecd6 1109 }
7bc9090a 1110 mb_type = btype2mb_type[ mb_type ];
de6d9b64
FB
1111 break;
1112 }
1113 dprintf("mb_type=%x\n", mb_type);
7bc9090a
MN
1114// motion_type = 0; /* avoid warning */
1115 if (IS_INTRA(mb_type)) {
1116 /* compute dct type */
1117 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1118 !s->frame_pred_frame_dct) {
1119 s->interlaced_dct = get_bits1(&s->gb);
1120 }
de6d9b64 1121
7bc9090a
MN
1122 if (IS_QUANT(mb_type))
1123 s->qscale = get_qscale(s);
1124
de6d9b64
FB
1125 if (s->concealment_motion_vectors) {
1126 /* just parse them */
1127 if (s->picture_structure != PICT_FRAME)
612476ef 1128 skip_bits1(&s->gb); /* field select */
daab3296
MN
1129
1130 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1131 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1132 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1133 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1134
7bc9090a 1135 skip_bits1(&s->gb); /* marker */
daab3296
MN
1136 }else
1137 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
de6d9b64 1138 s->mb_intra = 1;
a579db0c
IK
1139#ifdef HAVE_XVMC
1140 //one 1 we memcpy blocks in xvmcvideo
1141 if(s->avctx->xvmc_acceleration > 1){
1142 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1143 if(s->swap_uv){
1144 exchange_uv(s);
1145 }
1146 }
1147#endif
7bc9090a 1148
029911d1 1149 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
715731a3 1150 for(i=0;i<mb_block_count;i++) {
a579db0c 1151 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
7bc9090a
MN
1152 return -1;
1153 }
1154 } else {
1155 for(i=0;i<6;i++) {
a579db0c 1156 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
7bc9090a
MN
1157 return -1;
1158 }
1159 }
de6d9b64 1160 } else {
7bc9090a 1161 if (mb_type & MB_TYPE_ZERO_MV){
b40cd4e0 1162 assert(mb_type & MB_TYPE_CBP);
7bc9090a
MN
1163
1164 /* compute dct type */
1165 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1166 !s->frame_pred_frame_dct) {
1167 s->interlaced_dct = get_bits1(&s->gb);
1168 }
1169
1170 if (IS_QUANT(mb_type))
1171 s->qscale = get_qscale(s);
1172
1173 s->mv_dir = MV_DIR_FORWARD;
4c9544d0
MN
1174 if(s->picture_structure == PICT_FRAME)
1175 s->mv_type = MV_TYPE_16X16;
1176 else{
1177 s->mv_type = MV_TYPE_FIELD;
1178 mb_type |= MB_TYPE_INTERLACED;
1179 s->field_select[0][0]= s->picture_structure - 1;
1180 }
7bc9090a
MN
1181 s->last_mv[0][0][0] = 0;
1182 s->last_mv[0][0][1] = 0;
1183 s->last_mv[0][1][0] = 0;
1184 s->last_mv[0][1][1] = 0;
1185 s->mv[0][0][0] = 0;
1186 s->mv[0][0][1] = 0;
1187 }else{
1188 assert(mb_type & MB_TYPE_L0L1);
1189//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1190 /* get additionnal motion vector type */
1191 if (s->frame_pred_frame_dct)
1192 motion_type = MT_FRAME;
1193 else{
1194 motion_type = get_bits(&s->gb, 2);
1195 }
1196
1197 /* compute dct type */
1198 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
b40cd4e0 1199 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
7bc9090a
MN
1200 s->interlaced_dct = get_bits1(&s->gb);
1201 }
1202
1203 if (IS_QUANT(mb_type))
1204 s->qscale = get_qscale(s);
1205
1206 /* motion vectors */
1207 s->mv_dir = 0;
1208 for(i=0;i<2;i++) {
1209 if (USES_LIST(mb_type, i)) {
1210 s->mv_dir |= (MV_DIR_FORWARD >> i);
1211 dprintf("motion_type=%d\n", motion_type);
1212 switch(motion_type) {
1213 case MT_FRAME: /* or MT_16X8 */
1214 if (s->picture_structure == PICT_FRAME) {
1215 /* MT_FRAME */
1216 mb_type |= MB_TYPE_16x16;
1217 s->mv_type = MV_TYPE_16X16;
1218 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1219 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1220 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1221 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
de6d9b64 1222 /* full_pel: only for mpeg1 */
7bc9090a
MN
1223 if (s->full_pel[i]){
1224 s->mv[i][0][0] <<= 1;
1225 s->mv[i][0][1] <<= 1;
1226 }
1227 } else {
1228 /* MT_16X8 */
26f548a7 1229 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
7bc9090a
MN
1230 s->mv_type = MV_TYPE_16X8;
1231 for(j=0;j<2;j++) {
1232 s->field_select[i][j] = get_bits1(&s->gb);
1233 for(k=0;k<2;k++) {
1234 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1235 s->last_mv[i][j][k]);
1236 s->last_mv[i][j][k] = val;
1237 s->mv[i][j][k] = val;
1238 }
1239 }
de6d9b64 1240 }
7bc9090a
MN
1241 break;
1242 case MT_FIELD:
1243 s->mv_type = MV_TYPE_FIELD;
1244 if (s->picture_structure == PICT_FRAME) {
1245 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1246 for(j=0;j<2;j++) {
1247 s->field_select[i][j] = get_bits1(&s->gb);
1248 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1249 s->last_mv[i][j][0]);
1250 s->last_mv[i][j][0] = val;
1251 s->mv[i][j][0] = val;
1252 dprintf("fmx=%d\n", val);
1253 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1254 s->last_mv[i][j][1] >> 1);
1255 s->last_mv[i][j][1] = val << 1;
1256 s->mv[i][j][1] = val;
1257 dprintf("fmy=%d\n", val);
1258 }
1259 } else {
26f548a7 1260 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
7bc9090a 1261 s->field_select[i][0] = get_bits1(&s->gb);
de6d9b64
FB
1262 for(k=0;k<2;k++) {
1263 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
7bc9090a
MN
1264 s->last_mv[i][0][k]);
1265 s->last_mv[i][0][k] = val;
1266 s->last_mv[i][1][k] = val;
1267 s->mv[i][0][k] = val;
de6d9b64
FB
1268 }
1269 }
7bc9090a
MN
1270 break;
1271 case MT_DMV:
1272 {
1273 int dmx, dmy, mx, my, m;
1274
1275 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1276 s->last_mv[i][0][0]);
1277 s->last_mv[i][0][0] = mx;
1278 s->last_mv[i][1][0] = mx;
1279 dmx = get_dmv(s);
1280 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1281 s->last_mv[i][0][1] >> 1);
1282 dmy = get_dmv(s);
1283 s->mv_type = MV_TYPE_DMV;
1dff7d56
IK
1284
1285
1286 s->last_mv[i][0][1] = my<<1;
1287 s->last_mv[i][1][1] = my<<1;
1288
1289 s->mv[i][0][0] = mx;
1290 s->mv[i][0][1] = my;
1291 s->mv[i][1][0] = mx;//not used
1292 s->mv[i][1][1] = my;//not used
1293
7bc9090a
MN
1294 if (s->picture_structure == PICT_FRAME) {
1295 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1296
1dff7d56 1297 //m = 1 + 2 * s->top_field_first;
7bc9090a 1298 m = s->top_field_first ? 1 : 3;
1dff7d56 1299
7bc9090a 1300 /* top -> top pred */
1dff7d56
IK
1301 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1302 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
7bc9090a 1303 m = 4 - m;
7bc9090a
MN
1304 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1305 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1306 } else {
1307 mb_type |= MB_TYPE_16x16;
1308
1dff7d56
IK
1309 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1310 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1311 if(s->picture_structure == PICT_TOP_FIELD)
1312 s->mv[i][2][1]--;
1313 else
1314 s->mv[i][2][1]++;
7bc9090a 1315 }
de6d9b64 1316 }
7bc9090a 1317 break;
26f548a7
MN
1318 default:
1319 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1320 return -1;
de6d9b64 1321 }
de6d9b64
FB
1322 }
1323 }
1324 }
7bc9090a
MN
1325
1326 s->mb_intra = 0;
de6d9b64 1327
b40cd4e0 1328 if (HAS_CBP(mb_type)) {
7bc9090a 1329 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
494c56d3 1330 if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){
9b879566 1331 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
7bc9090a 1332 return -1;
de6d9b64 1333 }
715731a3
IK
1334 if(mb_block_count > 6){
1335 cbp<<= mb_block_count-6;
1336 cbp |= get_bits(&s->gb, mb_block_count-6);
5e5c247a 1337 }
7bc9090a 1338
a579db0c
IK
1339#ifdef HAVE_XVMC
1340 //on 1 we memcpy blocks in xvmcvideo
1341 if(s->avctx->xvmc_acceleration > 1){
1342 XVMC_pack_pblocks(s,cbp);
1343 if(s->swap_uv){
1344 exchange_uv(s);
1345 }
1346 }
1347#endif
1348
029911d1 1349 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
715731a3
IK
1350 cbp<<= 12-mb_block_count;
1351
1352 for(i=0;i<mb_block_count;i++) {
1353 if ( cbp & (1<<11) ) {
a579db0c 1354 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
7bc9090a
MN
1355 return -1;
1356 } else {
1357 s->block_last_index[i] = -1;
1358 }
715731a3 1359 cbp+=cbp;
de6d9b64 1360 }
7bc9090a
MN
1361 } else {
1362 for(i=0;i<6;i++) {
1363 if (cbp & 32) {
a579db0c 1364 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
7bc9090a
MN
1365 return -1;
1366 } else {
1367 s->block_last_index[i] = -1;
1368 }
1369 cbp+=cbp;
a0201736 1370 }
de6d9b64 1371 }
7bc9090a
MN
1372 }else{
1373 for(i=0;i<6;i++)
1374 s->block_last_index[i] = -1;
de6d9b64
FB
1375 }
1376 }
7bc9090a
MN
1377
1378 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1379
de6d9b64
FB
1380 return 0;
1381}
1382
1383/* as h263, but only 17 codes */
1384static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1385{
05858889 1386 int code, sign, val, l, shift;
de6d9b64 1387
8ed2ddb2 1388 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
de6d9b64
FB
1389 if (code == 0) {
1390 return pred;
1391 }
7bc9090a
MN
1392 if (code < 0) {
1393 return 0xffff;
1394 }
1395
612476ef 1396 sign = get_bits1(&s->gb);
de6d9b64 1397 shift = fcode - 1;
05858889
B
1398 val = code;
1399 if (shift) {
1400 val = (val - 1) << shift;
de6d9b64 1401 val |= get_bits(&s->gb, shift);
05858889
B
1402 val++;
1403 }
de6d9b64
FB
1404 if (sign)
1405 val = -val;
1406 val += pred;
1407
1408 /* modulo decoding */
0ff93477
MN
1409 l= INT_BIT - 5 - shift;
1410 val = (val<<l)>>l;
de6d9b64
FB
1411 return val;
1412}
1413
c3bf0288 1414static inline int decode_dc(GetBitContext *gb, int component)
de6d9b64
FB
1415{
1416 int code, diff;
1417
1418 if (component == 0) {
c3bf0288 1419 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
de6d9b64 1420 } else {
c3bf0288 1421 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
de6d9b64 1422 }
9ac7ecd6 1423 if (code < 0){
9b879566 1424 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
de6d9b64 1425 return 0xffff;
9ac7ecd6 1426 }
de6d9b64
FB
1427 if (code == 0) {
1428 diff = 0;
1429 } else {
c3bf0288 1430 diff = get_xbits(gb, code);
de6d9b64
FB
1431 }
1432 return diff;
1433}
1434
a0201736 1435static inline int mpeg1_decode_block_intra(MpegEncContext *s,
de6d9b64
FB
1436 DCTELEM *block,
1437 int n)
1438{
1439 int level, dc, diff, i, j, run;
a0201736 1440 int component;
de6d9b64 1441 RLTable *rl = &rl_mpeg1;
0c1a9eda
ZK
1442 uint8_t * const scantable= s->intra_scantable.permutated;
1443 const uint16_t *quant_matrix= s->intra_matrix;
a0201736 1444 const int qscale= s->qscale;
de6d9b64 1445
a0201736
MN
1446 /* DC coef */
1447 component = (n <= 3 ? 0 : n - 4 + 1);
c3bf0288 1448 diff = decode_dc(&s->gb, component);
a0201736
MN
1449 if (diff >= 0xffff)
1450 return -1;
1451 dc = s->last_dc[component];
1452 dc += diff;
1453 s->last_dc[component] = dc;
1454 block[0] = dc<<3;
1455 dprintf("dc=%d diff=%d\n", dc, diff);
1456 i = 0;
1457 {
1458 OPEN_READER(re, &s->gb);
1459 /* now quantify & encode AC coefs */
1460 for(;;) {
1461 UPDATE_CACHE(re, &s->gb);
1462 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1463
1464 if(level == 127){
1465 break;
1466 } else if(level != 0) {
1467 i += run;
1468 j = scantable[i];
51929fd3 1469 level= (level*qscale*quant_matrix[j])>>4;
a0201736
MN
1470 level= (level-1)|1;
1471 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1472 LAST_SKIP_BITS(re, &s->gb, 1);
1473 } else {
1474 /* escape */
1475 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1476 UPDATE_CACHE(re, &s->gb);
1477 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1478 if (level == -128) {
1479 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1480 } else if (level == 0) {
1481 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1482 }
1483 i += run;
1484 j = scantable[i];
1485 if(level<0){
1486 level= -level;
51929fd3 1487 level= (level*qscale*quant_matrix[j])>>4;
a0201736
MN
1488 level= (level-1)|1;
1489 level= -level;
1490 }else{
51929fd3 1491 level= (level*qscale*quant_matrix[j])>>4;
a0201736
MN
1492 level= (level-1)|1;
1493 }
1494 }
1495 if (i > 63){
9b879566 1496 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
a0201736
MN
1497 return -1;
1498 }
1499
1500 block[j] = level;
1501 }
1502 CLOSE_READER(re, &s->gb);
1503 }
1504 s->block_last_index[n] = i;
1505 return 0;
1506}
1507
1508static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1509 DCTELEM *block,
1510 int n)
1511{
1512 int level, i, j, run;
1513 RLTable *rl = &rl_mpeg1;
0c1a9eda
ZK
1514 uint8_t * const scantable= s->intra_scantable.permutated;
1515 const uint16_t *quant_matrix= s->inter_matrix;
a0201736
MN
1516 const int qscale= s->qscale;
1517
1518 {
8db1a1dd
MN
1519 int v;
1520 OPEN_READER(re, &s->gb);
a0201736 1521 i = -1;
de6d9b64 1522 /* special case for the first coef. no need to add a second vlc table */
8db1a1dd
MN
1523 UPDATE_CACHE(re, &s->gb);
1524 v= SHOW_UBITS(re, &s->gb, 2);
de6d9b64 1525 if (v & 2) {
3729c912 1526 LAST_SKIP_BITS(re, &s->gb, 2);
51929fd3 1527 level= (3*qscale*quant_matrix[0])>>5;
a0201736
MN
1528 level= (level-1)|1;
1529 if(v&1)
1530 level= -level;
3729c912 1531 block[0] = level;
a0201736 1532 i++;
de6d9b64 1533 }
3729c912 1534
a0201736
MN
1535 /* now quantify & encode AC coefs */
1536 for(;;) {
1537 UPDATE_CACHE(re, &s->gb);
1538 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1539
1540 if(level == 127){
1541 break;
1542 } else if(level != 0) {
1543 i += run;
1544 j = scantable[i];
51929fd3 1545 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
a0201736
MN
1546 level= (level-1)|1;
1547 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1548 LAST_SKIP_BITS(re, &s->gb, 1);
1549 } else {
1550 /* escape */
1551 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1552 UPDATE_CACHE(re, &s->gb);
1553 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1554 if (level == -128) {
1555 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1556 } else if (level == 0) {
1557 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1558 }
1559 i += run;
1560 j = scantable[i];
1561 if(level<0){
1562 level= -level;
51929fd3 1563 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
a0201736
MN
1564 level= (level-1)|1;
1565 level= -level;
1566 }else{
51929fd3 1567 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
a0201736
MN
1568 level= (level-1)|1;
1569 }
de6d9b64 1570 }
a0201736 1571 if (i > 63){
9b879566 1572 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
a0201736
MN
1573 return -1;
1574 }
1575
1576 block[j] = level;
de6d9b64 1577 }
a0201736 1578 CLOSE_READER(re, &s->gb);
de6d9b64 1579 }
a0201736 1580 s->block_last_index[n] = i;
de6d9b64
FB
1581 return 0;
1582}
1583
1584/* Also does unquantization here, since I will never support mpeg2
1585 encoding */
3729c912
MN
1586static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1587 DCTELEM *block,
1588 int n)
de6d9b64
FB
1589{
1590 int level, i, j, run;
de6d9b64 1591 RLTable *rl = &rl_mpeg1;
0c1a9eda
ZK
1592 uint8_t * const scantable= s->intra_scantable.permutated;
1593 const uint16_t *quant_matrix;
3729c912 1594 const int qscale= s->qscale;
de6d9b64
FB
1595 int mismatch;
1596
de6d9b64
FB
1597 mismatch = 1;
1598
1599 {
8db1a1dd
MN
1600 int v;
1601 OPEN_READER(re, &s->gb);
3729c912 1602 i = -1;
8db1a1dd 1603 if (n < 4)
3729c912 1604 quant_matrix = s->inter_matrix;
de6d9b64 1605 else
3729c912 1606 quant_matrix = s->chroma_inter_matrix;
8db1a1dd 1607
de6d9b64 1608 /* special case for the first coef. no need to add a second vlc table */
8db1a1dd
MN
1609 UPDATE_CACHE(re, &s->gb);
1610 v= SHOW_UBITS(re, &s->gb, 2);
de6d9b64 1611 if (v & 2) {
3729c912
MN
1612 LAST_SKIP_BITS(re, &s->gb, 2);
1613 level= (3*qscale*quant_matrix[0])>>5;
1614 if(v&1)
1615 level= -level;
1616 block[0] = level;
1617 mismatch ^= level;
1618 i++;
de6d9b64 1619 }
de6d9b64 1620
3729c912
MN
1621 /* now quantify & encode AC coefs */
1622 for(;;) {
1623 UPDATE_CACHE(re, &s->gb);
1624 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1625
1626 if(level == 127){
1627 break;
1628 } else if(level != 0) {
1629 i += run;
1630 j = scantable[i];
1631 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1632 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1633 LAST_SKIP_BITS(re, &s->gb, 1);
1634 } else {
1635 /* escape */
1636 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1637 UPDATE_CACHE(re, &s->gb);
1638 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1639
1640 i += run;
1641 j = scantable[i];
1642 if(level<0){
1643 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1644 level= -level;
1645 }else{
1646 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1647 }
1648 }
1649 if (i > 63){
9b879566 1650 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
3729c912
MN
1651 return -1;
1652 }
1653
1654 mismatch ^= level;
1655 block[j] = level;
25ed7f92 1656 }
3729c912 1657 CLOSE_READER(re, &s->gb);
de6d9b64
FB
1658 }
1659 block[63] ^= (mismatch & 1);
3729c912 1660
de6d9b64
FB
1661 s->block_last_index[n] = i;
1662 return 0;
1663}
1664
3729c912
MN
1665static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1666 DCTELEM *block,
1667 int n)
de6d9b64
FB
1668{
1669 int level, dc, diff, i, j, run;
3729c912 1670 int component;
de6d9b64 1671 RLTable *rl;
0c1a9eda
ZK
1672 uint8_t * const scantable= s->intra_scantable.permutated;
1673 const uint16_t *quant_matrix;
3729c912 1674 const int qscale= s->qscale;
de6d9b64
FB
1675 int mismatch;
1676
de6d9b64 1677 /* DC coef */
3729c912
MN
1678 if (n < 4){
1679 quant_matrix = s->intra_matrix;
1680 component = 0;
1681 }else{
1682 quant_matrix = s->chroma_intra_matrix;
5e5c247a 1683 component = (n&1) + 1;
3729c912 1684 }
c3bf0288 1685 diff = decode_dc(&s->gb, component);
de6d9b64
FB
1686 if (diff >= 0xffff)
1687 return -1;
1688 dc = s->last_dc[component];
1689 dc += diff;
1690 s->last_dc[component] = dc;
1691 block[0] = dc << (3 - s->intra_dc_precision);
1692 dprintf("dc=%d\n", block[0]);
d753173a 1693 mismatch = block[0] ^ 1;
3729c912 1694 i = 0;
de6d9b64
FB
1695 if (s->intra_vlc_format)
1696 rl = &rl_mpeg2;
1697 else
1698 rl = &rl_mpeg1;
25ed7f92 1699
3729c912
MN
1700 {
1701 OPEN_READER(re, &s->gb);
1702 /* now quantify & encode AC coefs */
1703 for(;;) {
1704 UPDATE_CACHE(re, &s->gb);
1705 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1706
1707 if(level == 127){
1708 break;
1709 } else if(level != 0) {
1710 i += run;
1711 j = scantable[i];
1712 level= (level*qscale*quant_matrix[j])>>4;
1713 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1714 LAST_SKIP_BITS(re, &s->gb, 1);
1715 } else {
1716 /* escape */
1717 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1718 UPDATE_CACHE(re, &s->gb);
1719 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1720 i += run;
1721 j = scantable[i];
1722 if(level<0){
1723 level= (-level*qscale*quant_matrix[j])>>4;
1724 level= -level;
1725 }else{
1726 level= (level*qscale*quant_matrix[j])>>4;
1727 }
1728 }
1729 if (i > 63){
9b879566 1730 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
3729c912
MN
1731 return -1;
1732 }
1733
1734 mismatch^= level;
1735 block[j] = level;
9ac7ecd6 1736 }
3729c912 1737 CLOSE_READER(re, &s->gb);
de6d9b64 1738 }
3729c912
MN
1739 block[63]^= mismatch&1;
1740
de6d9b64
FB
1741 s->block_last_index[n] = i;
1742 return 0;
1743}
1744
de6d9b64
FB
1745typedef struct Mpeg1Context {
1746 MpegEncContext mpeg_enc_ctx;
de6d9b64 1747 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1cb0edb4 1748 int repeat_field; /* true if we must repeat the field */
fa384dcc 1749 AVPanScan pan_scan; /** some temporary storage for the panscan */
c62c07d3 1750 int slice_count;
a6b9ffbf
IK
1751 int swap_uv;//indicate VCR2
1752 int save_aspect_info;
1753
de6d9b64
FB
1754} Mpeg1Context;
1755
1756static int mpeg_decode_init(AVCodecContext *avctx)
1757{
1758 Mpeg1Context *s = avctx->priv_data;
3edcacde 1759 MpegEncContext *s2 = &s->mpeg_enc_ctx;
d1700ead 1760 int i;
3edcacde 1761
d1700ead
IK
1762 //we need some parmutation to store
1763 //matrixes, until MPV_common_init()
1764 //set the real permutatuon
1765 for(i=0;i<64;i++)
1766 s2->dsp.idct_permutation[i]=i;
1767
3edcacde 1768 MPV_decode_defaults(s2);
8f8402e4 1769
303aebf9 1770 s->mpeg_enc_ctx.avctx= avctx;
94aec31f 1771 s->mpeg_enc_ctx.flags= avctx->flags;
303e50e6 1772 s->mpeg_enc_ctx.flags2= avctx->flags2;
8f8402e4 1773 common_init(&s->mpeg_enc_ctx);
c3bf0288 1774 init_vlcs();
de6d9b64 1775
de6d9b64 1776 s->mpeg_enc_ctx_allocated = 0;
de6d9b64 1777 s->mpeg_enc_ctx.picture_number = 0;
1cb0edb4 1778 s->repeat_field = 0;
d7e9533a 1779 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
de6d9b64
FB
1780 return 0;
1781}
1782
a6b9ffbf
IK
1783static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1784 const uint8_t *new_perm){
1785uint16_t temp_matrix[64];
1786int i;
1787
1788 memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
1789
1790 for(i=0;i<64;i++){
1791 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1792 }
1793}
1794
1795//Call this function when we know all parameters
1796//it may be called in different places for mpeg1 and mpeg2
1797static int mpeg_decode_postinit(AVCodecContext *avctx){
1798Mpeg1Context *s1 = avctx->priv_data;
1799MpegEncContext *s = &s1->mpeg_enc_ctx;
1800uint8_t old_permutation[64];
1801
1802
1803 if (
1804 (s1->mpeg_enc_ctx_allocated == 0)||
1805 avctx->width != s->width ||
1806 avctx->height != s->height||
1807// s1->save_aspect_info != avctx->aspect_ratio_info||
1808 0)
1809 {
1810
1811 if (s1->mpeg_enc_ctx_allocated) {
1812 MPV_common_end(s);
1813 }
1814
1815 if( (s->width == 0 )||(s->height == 0))
1816 return -2;
1817
1818 avctx->width = s->width;
1819 avctx->height = s->height;
1820 avctx->bit_rate = s->bit_rate;
1821 s1->save_aspect_info = s->aspect_ratio_info;
1822
1823 //low_delay may be forced, in this case we will have B frames
1824 //that behave like P frames
1825 avctx->has_b_frames = !(s->low_delay);
1826
1827 if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
1828 //mpeg1 fps
1829 avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
1830 avctx->frame_rate_base= frame_rate_tab[s->frame_rate_index].den;
1831 //mpeg1 aspect
1832 avctx->sample_aspect_ratio= av_d2q(
1833 1.0/mpeg1_aspect[s->aspect_ratio_info], 255);
1834
1835 }else{//mpeg2
1836 //mpeg2 fps
1837 av_reduce(
1838 &s->avctx->frame_rate,
1839 &s->avctx->frame_rate_base,
1840 frame_rate_tab[s->frame_rate_index].num * (s->frame_rate_ext_n+1),
1841 frame_rate_tab[s->frame_rate_index].den * (s->frame_rate_ext_d+1),
1842 1<<30);
1843 //mpeg2 aspect
1844 if(s->aspect_ratio_info > 1){
6fe1a1a5 1845 if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){
a6b9ffbf 1846 s->avctx->sample_aspect_ratio=
5ac47683
IK
1847 av_div_q(
1848 mpeg2_aspect[s->aspect_ratio_info],
1849 (AVRational){s->width, s->height}
1850 );
a6b9ffbf
IK
1851 }else{
1852 s->avctx->sample_aspect_ratio=
1853 av_div_q(
1854 mpeg2_aspect[s->aspect_ratio_info],
6fe1a1a5 1855 (AVRational){s1->pan_scan.width, s1->pan_scan.height}
a6b9ffbf
IK
1856 );
1857 }
1858 }else{
1859 s->avctx->sample_aspect_ratio=
5ac47683 1860 mpeg2_aspect[s->aspect_ratio_info];
a6b9ffbf
IK
1861 }
1862 }//mpeg2
1863
1864 if(avctx->xvmc_acceleration){
1865 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
1866 }else{
1867 if(s->chroma_format < 2){
1868 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
1869 }else
1870 if(s->chroma_format == 2){
1871 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422);
1872 }else
1873 if(s->chroma_format > 2){
1874 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444);
1875 }
1876 }
1877 //until then pix_fmt may be changed right after codec init
1878 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
1879 if( avctx->idct_algo == FF_IDCT_AUTO )
1880 avctx->idct_algo = FF_IDCT_SIMPLE;
1881
1882 //quantization matrixes may need reordering
1883 //if dct permutation is changed
1884 memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
1885
1886 if (MPV_common_init(s) < 0)
1887 return -2;
1888
1889 quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
1890 quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
1891 quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
1892 quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
1893
1894 s1->mpeg_enc_ctx_allocated = 1;
1895 }
1896 return 0;
1897}
1898
de6d9b64
FB
1899/* return the 8 bit start code value and update the search
1900 state. Return -1 if no start code found */
5f0f7713 1901static int find_start_code(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
de6d9b64 1902{
c7516a00
MN
1903 const uint8_t *buf_ptr= *pbuf_ptr;
1904
1905 buf_ptr++; //gurantees that -1 is within the array
1906 buf_end -= 2; // gurantees that +2 is within the array
de6d9b64 1907
de6d9b64 1908 while (buf_ptr < buf_end) {
c7516a00
MN
1909 if(*buf_ptr==0){
1910 while(buf_ptr < buf_end && buf_ptr[1]==0)
1911 buf_ptr++;
1912
1913 if(buf_ptr[-1] == 0 && buf_ptr[1] == 1){
1914 *pbuf_ptr = buf_ptr+3;
1915 return buf_ptr[2] + 0x100;
1916 }
de6d9b64 1917 }
c7516a00 1918 buf_ptr += 2;
de6d9b64 1919 }
c7516a00
MN
1920 buf_end += 2; //undo the hack above
1921
1922 *pbuf_ptr = buf_end;
1923 return -1;
de6d9b64
FB
1924}
1925
1926static int mpeg1_decode_picture(AVCodecContext *avctx,
5f0f7713 1927 const uint8_t *buf, int buf_size)
de6d9b64
FB
1928{
1929 Mpeg1Context *s1 = avctx->priv_data;
1930 MpegEncContext *s = &s1->mpeg_enc_ctx;
d60a8f85 1931 int ref, f_code, vbv_delay;
de6d9b64 1932
a6b9ffbf
IK
1933 if(mpeg_decode_postinit(s->avctx) < 0)
1934 return -2;
1935
68f593b4 1936 init_get_bits(&s->gb, buf, buf_size*8);
de6d9b64
FB
1937
1938 ref = get_bits(&s->gb, 10); /* temporal ref */
1939 s->pict_type = get_bits(&s->gb, 3);
58bfafbe 1940
d60a8f85 1941 vbv_delay= get_bits(&s->gb, 16);
de6d9b64 1942 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
612476ef 1943 s->full_pel[0] = get_bits1(&s->gb);
de6d9b64
FB
1944 f_code = get_bits(&s->gb, 3);
1945 if (f_code == 0)
1946 return -1;
1947 s->mpeg_f_code[0][0] = f_code;
1948 s->mpeg_f_code[0][1] = f_code;
1949 }
1950 if (s->pict_type == B_TYPE) {
612476ef 1951 s->full_pel[1] = get_bits1(&s->gb);
de6d9b64
FB
1952 f_code = get_bits(&s->gb, 3);
1953 if (f_code == 0)
1954 return -1;
1955 s->mpeg_f_code[1][0] = f_code;
1956 s->mpeg_f_code[1][1] = f_code;
1957 }
1e491e29
MN
1958 s->current_picture.pict_type= s->pict_type;
1959 s->current_picture.key_frame= s->pict_type == I_TYPE;
d9cb5429 1960
b1b8f9fc
MN
1961// if(avctx->debug & FF_DEBUG_PICT_INFO)
1962// av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d\n", vbv_delay, ref);
1963
de6d9b64
FB
1964 s->y_dc_scale = 8;
1965 s->c_dc_scale = 8;
1966 s->first_slice = 1;
1967 return 0;
1968}
1969
1970static void mpeg_decode_sequence_extension(MpegEncContext *s)
1971{
1972 int horiz_size_ext, vert_size_ext;
baaf3f46 1973 int bit_rate_ext;
029911d1 1974 int level, profile;
de6d9b64 1975
029911d1
MN
1976 skip_bits(&s->gb, 1); /* profil and level esc*/
1977 profile= get_bits(&s->gb, 3);
1978 level= get_bits(&s->gb, 4);
1cb0edb4 1979 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
5e5c247a 1980 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
de6d9b64
FB
1981 horiz_size_ext = get_bits(&s->gb, 2);
1982 vert_size_ext = get_bits(&s->gb, 2);
1983 s->width |= (horiz_size_ext << 12);
1984 s->height |= (vert_size_ext << 12);
1985 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
5e5c247a 1986 s->bit_rate += (bit_rate_ext << 12) * 400;
612476ef 1987 skip_bits1(&s->gb); /* marker */
0368c72d 1988 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
e0560448 1989
945f15b7 1990 s->low_delay = get_bits1(&s->gb);
e0560448
MN
1991 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
1992
a6b9ffbf
IK
1993 s->frame_rate_ext_n = get_bits(&s->gb, 2);
1994 s->frame_rate_ext_d = get_bits(&s->gb, 5);
14bea432 1995
de6d9b64 1996 dprintf("sequence extension\n");
029911d1 1997 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
fb4a4a56 1998 s->avctx->sub_id = 2; /* indicates mpeg2 found */
945f15b7 1999
029911d1 2000 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
0368c72d
MN
2001 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
2002 profile, level, s->avctx->rc_buffer_size, s->bit_rate);
a6b9ffbf 2003
de6d9b64
FB
2004}
2005
fa384dcc
MN
2006static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
2007{
2008 MpegEncContext *s= &s1->mpeg_enc_ctx;
2009 int color_description, w, h;
2010
2011 skip_bits(&s->gb, 3); /* video format */
2012 color_description= get_bits1(&s->gb);
2013 if(color_description){
2014 skip_bits(&s->gb, 8); /* color primaries */
2015 skip_bits(&s->gb, 8); /* transfer_characteristics */
2016 skip_bits(&s->gb, 8); /* matrix_coefficients */
2017 }
2018 w= get_bits(&s->gb, 14);
2019 skip_bits(&s->gb, 1); //marker
2020 h= get_bits(&s->gb, 14);
2021 skip_bits(&s->gb, 1); //marker
2022
2023 s1->pan_scan.width= 16*w;
2024 s1->pan_scan.height=16*h;
6fe1a1a5 2025
fa384dcc 2026 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
9b879566 2027 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
fa384dcc
MN
2028}
2029
2030static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
2031{
2032 MpegEncContext *s= &s1->mpeg_enc_ctx;
6fe1a1a5
IK
2033 int i,nofco;
2034
2035 nofco = 1;
2036 if(s->progressive_sequence){
2037 if(s->repeat_first_field){
2038 nofco++;
2039 if(s->top_field_first)
2040 nofco++;
2041 }
2042 }else{
2043 if(s->picture_structure == PICT_FRAME){
2044 nofco++;
2045 if(s->repeat_first_field)
2046 nofco++;
2047 }
2048 }
2049 for(i=0; i<nofco; i++){
fa384dcc
MN
2050 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
2051 skip_bits(&s->gb, 1); //marker
2052 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
2053 skip_bits(&s->gb, 1); //marker
2054 }
2055
2056 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
9b879566 2057 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
fa384dcc
MN
2058 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
2059 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
2060 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
2061 );
2062}
2063
de6d9b64
FB
2064static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
2065{
60832448 2066 int i, v, j;
de6d9b64 2067
25ed7f92
FB
2068 dprintf("matrix extension\n");
2069
612476ef 2070 if (get_bits1(&s->gb)) {
de6d9b64
FB
2071 for(i=0;i<64;i++) {
2072 v = get_bits(&s->gb, 8);
b0368839 2073 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
60832448
FB
2074 s->intra_matrix[j] = v;
2075 s->chroma_intra_matrix[j] = v;
de6d9b64
FB
2076 }
2077 }
612476ef 2078 if (get_bits1(&s->gb)) {
de6d9b64
FB
2079 for(i=0;i<64;i++) {
2080 v = get_bits(&s->gb, 8);
b0368839 2081 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
d7e9533a
MN
2082 s->inter_matrix[j] = v;
2083 s->chroma_inter_matrix[j] = v;
de6d9b64
FB
2084 }
2085 }
612476ef 2086 if (get_bits1(&s->gb)) {
de6d9b64
FB
2087 for(i=0;i<64;i++) {
2088 v = get_bits(&s->gb, 8);
b0368839 2089 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
60832448 2090 s->chroma_intra_matrix[j] = v;
de6d9b64
FB
2091 }
2092 }
612476ef 2093 if (get_bits1(&s->gb)) {
de6d9b64
FB
2094 for(i=0;i<64;i++) {
2095 v = get_bits(&s->gb, 8);
b0368839 2096 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
d7e9533a 2097 s->chroma_inter_matrix[j] = v;
de6d9b64
FB
2098 }
2099 }
2100}
2101
2102static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
2103{
2104 s->full_pel[0] = s->full_pel[1] = 0;
2105 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
2106 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
2107 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
2108 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
2109 s->intra_dc_precision = get_bits(&s->gb, 2);
2110 s->picture_structure = get_bits(&s->gb, 2);
612476ef
A
2111 s->top_field_first = get_bits1(&s->gb);
2112 s->frame_pred_frame_dct = get_bits1(&s->gb);
2113 s->concealment_motion_vectors = get_bits1(&s->gb);
2114 s->q_scale_type = get_bits1(&s->gb);
2115 s->intra_vlc_format = get_bits1(&s->gb);
2116 s->alternate_scan = get_bits1(&s->gb);
2117 s->repeat_first_field = get_bits1(&s->gb);
2118 s->chroma_420_type = get_bits1(&s->gb);
2119 s->progressive_frame = get_bits1(&s->gb);
bb198e19 2120
dfb476cb
MN
2121 if(s->picture_structure == PICT_FRAME)
2122 s->first_field=0;
2123 else{
2124 s->first_field ^= 1;
7bc9090a 2125 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
dfb476cb
MN
2126 }
2127
acf44abb 2128 if(s->alternate_scan){
3d2e8cce
MN
2129 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
2130 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
acf44abb 2131 }else{
3d2e8cce
MN
2132 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
2133 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
acf44abb
MN
2134 }
2135
de6d9b64 2136 /* composite display not parsed */
1cb0edb4 2137 dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
25ed7f92 2138 dprintf("picture_structure=%d\n", s->picture_structure);
e0a3d744
J
2139 dprintf("top field first=%d\n", s->top_field_first);
2140 dprintf("repeat first field=%d\n", s->repeat_first_field);
de6d9b64 2141 dprintf("conceal=%d\n", s->concealment_motion_vectors);
25ed7f92
FB
2142 dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
2143 dprintf("alternate_scan=%d\n", s->alternate_scan);
de6d9b64 2144 dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1cb0edb4 2145 dprintf("progressive_frame=%d\n", s->progressive_frame);
de6d9b64
FB
2146}
2147
2148static void mpeg_decode_extension(AVCodecContext *avctx,
5f0f7713 2149 const uint8_t *buf, int buf_size)
de6d9b64
FB
2150{
2151 Mpeg1Context *s1 = avctx->priv_data;
2152 MpegEncContext *s = &s1->mpeg_enc_ctx;
2153 int ext_type;
2154
68f593b4 2155 init_get_bits(&s->gb, buf, buf_size*8);
de6d9b64
FB
2156
2157 ext_type = get_bits(&s->gb, 4);
2158 switch(ext_type) {
2159 case 0x1:
de6d9b64
FB
2160 mpeg_decode_sequence_extension(s);
2161 break;
fa384dcc
MN
2162 case 0x2:
2163 mpeg_decode_sequence_display_extension(s1);
2164 break;
de6d9b64 2165 case 0x3:
de6d9b64
FB
2166 mpeg_decode_quant_matrix_extension(s);
2167 break;
fa384dcc
MN
2168 case 0x7:
2169 mpeg_decode_picture_display_extension(s1);
2170 break;
de6d9b64 2171 case 0x8:
de6d9b64
FB
2172 mpeg_decode_picture_coding_extension(s);
2173 break;
2174 }
2175}
2176
a579db0c
IK
2177static void exchange_uv(MpegEncContext *s){
2178short * tmp;
2179
2180 tmp = s->pblocks[4];
2181 s->pblocks[4] = s->pblocks[5];
2182 s->pblocks[5] = tmp;
ff862be5
MN
2183}
2184
c62c07d3
MN
2185static int mpeg_field_start(MpegEncContext *s){
2186 AVCodecContext *avctx= s->avctx;
2187 Mpeg1Context *s1 = (Mpeg1Context*)s;
de6d9b64 2188
de6d9b64 2189 /* start frame decoding */
c62c07d3 2190 if(s->first_field || s->picture_structure==PICT_FRAME){
d6db1c9c 2191 if(MPV_frame_start(s, avctx) < 0)
c62c07d3 2192 return -1;
7bc9090a
MN
2193
2194 ff_er_frame_start(s);
2195
2ec23b6d 2196 /* first check if we must repeat the frame */
9ee2c20e 2197 s->current_picture_ptr->repeat_pict = 0;
2ec23b6d
MN
2198 if (s->repeat_first_field) {
2199 if (s->progressive_sequence) {
2200 if (s->top_field_first)
9ee2c20e 2201 s->current_picture_ptr->repeat_pict = 4;
2ec23b6d 2202 else
9ee2c20e 2203 s->current_picture_ptr->repeat_pict = 2;
2ec23b6d 2204 } else if (s->progressive_frame) {
9ee2c20e 2205 s->current_picture_ptr->repeat_pict = 1;
2ec23b6d
MN
2206 }
2207 }
fa384dcc
MN
2208
2209 *s->current_picture_ptr->pan_scan= s1->pan_scan;
c62c07d3 2210 }else{ //second field
b536d0aa 2211 int i;
37b787f1
MN
2212
2213 if(!s->current_picture_ptr){
9b879566 2214 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
37b787f1
MN
2215 return -1;
2216 }
2217
b536d0aa
MN
2218 for(i=0; i<4; i++){
2219 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2220 if(s->picture_structure == PICT_BOTTOM_FIELD){
2221 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2222 }
2223 }
c62c07d3 2224 }
2e7b4c84
IK
2225#ifdef HAVE_XVMC
2226// MPV_frame_start will call this function too,
2227// but we need to call it on every field
c62c07d3 2228 if(s->avctx->xvmc_acceleration)
2e7b4c84
IK
2229 XVMC_field_start(s,avctx);
2230#endif
de6d9b64 2231
c62c07d3
MN
2232 return 0;
2233}
2234
2235#define DECODE_SLICE_ERROR -1
2236#define DECODE_SLICE_OK 0
2237
2238/**
2239 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
2240 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
2241 * DECODE_SLICE_OK if this slice is ok<br>
2242 */
2243static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
5f0f7713 2244 const uint8_t **buf, int buf_size)
c62c07d3
MN
2245{
2246 MpegEncContext *s = &s1->mpeg_enc_ctx;
2247 AVCodecContext *avctx= s->avctx;
2248 int ret;
2249 const int field_pic= s->picture_structure != PICT_FRAME;
2250
2251 s->resync_mb_x=
2252 s->resync_mb_y= -1;
2253
25ef43bb
MN
2254 if (mb_y<<field_pic >= s->mb_height){
2255 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height);
c62c07d3
MN
2256 return -1;
2257 }
2258
80097bbf 2259 init_get_bits(&s->gb, *buf, buf_size*8);
de6d9b64 2260
c62c07d3
MN
2261 ff_mpeg1_clean_buffers(s);
2262 s->interlaced_dct = 0;
2263
0ee50938 2264 s->qscale = get_qscale(s);
a4337a51 2265
7bc9090a 2266 if(s->qscale == 0){
9b879566 2267 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
db6e7795 2268 return -1;
7bc9090a
MN
2269 }
2270
de6d9b64 2271 /* extra slice info */
612476ef
A
2272 while (get_bits1(&s->gb) != 0) {
2273 skip_bits(&s->gb, 8);
de6d9b64 2274 }
7bc9090a 2275
ce5b7c5e 2276 s->mb_x=0;
7bc9090a 2277
ce5b7c5e
MN
2278 for(;;) {
2279 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
7bc9090a 2280 if (code < 0){
9b879566 2281 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
db6e7795 2282 return -1;
7bc9090a 2283 }
ce5b7c5e
MN
2284 if (code >= 33) {
2285 if (code == 33) {
2286 s->mb_x += 33;
2287 }
2288 /* otherwise, stuffing, nothing to do */
2289 } else {
2290 s->mb_x += code;
2291 break;
2292 }
2293 }
c62c07d3 2294
7bc9090a 2295 s->resync_mb_x= s->mb_x;
c62c07d3 2296 s->resync_mb_y= s->mb_y= mb_y;
9b8709d1 2297 s->mb_skip_run= 0;
7d1c3fc1 2298 ff_init_block_index(s);
ce5b7c5e 2299
c62c07d3
MN
2300 if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
2301 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2302 av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
2303 s->qscale, s->mpeg_f_code[0][0],s->mpeg_f_code[0][1],s->mpeg_f_code[1][0],s->mpeg_f_code[1][1],
2304 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2305 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2306 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2307 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2308 }
2309 }
2310
de6d9b64 2311 for(;;) {
a579db0c
IK
2312#ifdef HAVE_XVMC
2313 //one 1 we memcpy blocks in xvmcvideo
2314 if(s->avctx->xvmc_acceleration > 1)
2315 XVMC_init_block(s);//set s->block
2316#endif
2317
eb4b3dd3 2318 s->dsp.clear_blocks(s->block[0]);
ffdff4d7
IK
2319 if(!s->chroma_y_shift){
2320 s->dsp.clear_blocks(s->block[6]);
2321 }
b7ec19d3 2322 ret = mpeg_decode_mb(s, s->block);
332f9ac4 2323 s->chroma_qscale= s->qscale;
7bc9090a 2324
de6d9b64
FB
2325 dprintf("ret=%d\n", ret);
2326 if (ret < 0)
2327 return -1;
8d7ec294 2328
31b1ec5d 2329 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
137c8468
MN
2330 const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride;
2331 int xy = s->mb_x*2 + s->mb_y*2*wrap;
4c9544d0 2332 int motion_x, motion_y, dir, i;
31b1ec5d
MN
2333 if(field_pic && !s->first_field)
2334 xy += wrap/2;
2335
50c93f74
MN
2336 for(i=0; i<2; i++){
2337 for(dir=0; dir<2; dir++){
4c9544d0
MN
2338 if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
2339 motion_x = motion_y = 0;
0c352cad 2340 }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
4c9544d0
MN
2341 motion_x = s->mv[dir][0][0];
2342 motion_y = s->mv[dir][0][1];
2343 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2344 motion_x = s->mv[dir][i][0];
2345 motion_y = s->mv[dir][i][1];
2346 }
7c4f71c4 2347
4c9544d0
MN
2348 s->current_picture.motion_val[dir][xy ][0] = motion_x;
2349 s->current_picture.motion_val[dir][xy ][1] = motion_y;
2350 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
2351 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
7c4f71c4
MN
2352 s->current_picture.ref_index [dir][xy ]=
2353 s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i];
4c9544d0 2354 }
50c93f74 2355 xy += wrap;
7bc9090a 2356 }
7bc9090a 2357 }
8d7ec294 2358
7d1c3fc1 2359 s->dest[0] += 16;
ffdff4d7
IK
2360 s->dest[1] += 16 >> s->chroma_x_shift;
2361 s->dest[2] += 16 >> s->chroma_x_shift;
ce5b7c5e 2362
7d1c3fc1
MN
2363 MPV_decode_mb(s, s->block);
2364
ce5b7c5e 2365 if (++s->mb_x >= s->mb_width) {
ff862be5 2366
3bb07d61 2367 ff_draw_horiz_band(s, 16*s->mb_y, 16);
ce5b7c5e
MN
2368
2369 s->mb_x = 0;
2370 s->mb_y++;
cf713bb8
MN
2371
2372 if(s->mb_y<<field_pic >= s->mb_height){
2373 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2374
2375 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
2376 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
9b879566 2377 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d\n", left);
cf713bb8
MN
2378 return -1;
2379 }else
2380 goto eos;
2381 }
7d1c3fc1
MN
2382
2383 ff_init_block_index(s);
ce5b7c5e 2384 }
ce5b7c5e
MN
2385
2386 /* skip mb handling */
9b8709d1 2387 if (s->mb_skip_run == -1) {
ce5b7c5e 2388 /* read again increment */
9b8709d1 2389 s->mb_skip_run = 0;
ce5b7c5e
MN
2390 for(;;) {
2391 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
7bc9090a 2392 if (code < 0){
9b879566 2393 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
9c00c3af 2394 return -1;
7bc9090a 2395 }
ce5b7c5e
MN
2396 if (code >= 33) {
2397 if (code == 33) {
9b8709d1 2398 s->mb_skip_run += 33;
9c00c3af
MN
2399 }else if(code == 35){
2400 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
9b879566 2401 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
9c00c3af
MN
2402 return -1;
2403 }
2404 goto eos; /* end of slice */
ce5b7c5e
MN
2405 }
2406 /* otherwise, stuffing, nothing to do */
2407 } else {
9b8709d1 2408 s->mb_skip_run += code;
ce5b7c5e
MN
2409 break;
2410 }
2411 }
2412 }
de6d9b64 2413 }
db6e7795
MN
2414eos: // end of slice
2415 *buf += get_bits_count(&s->gb)/8 - 1;
7bc9090a 2416//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
db6e7795
MN
2417 return 0;
2418}
7bc9090a 2419
c62c07d3
MN
2420static int slice_decode_thread(AVCodecContext *c, void *arg){
2421 MpegEncContext *s= arg;
49a37411 2422 const uint8_t *buf= s->gb.buffer;
c62c07d3
MN
2423 int mb_y= s->start_mb_y;
2424
2425 s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width;
2426
2427 for(;;){
2428 int start_code, ret;
2429
2430 ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
2431 emms_c();
2432//av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2433//ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count);
2434 if(ret < 0){
2435 if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
2436 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
2437 }else{
2438 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
2439 }
2440
2441 if(s->mb_y == s->end_mb_y)
2442 return 0;
2443
2444 start_code = find_start_code(&buf, s->gb.buffer_end);
2445 mb_y= start_code - SLICE_MIN_START_CODE;
2446 if(mb_y < 0 || mb_y >= s->end_mb_y)
2447 return -1;
2448 }
2449
2450 return 0; //not reached
2451}
2452
db6e7795
MN
2453/**
2454 * handles slice ends.
2455 * @return 1 if it seems to be the last slice of
2456 */
2457static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2458{
2459 Mpeg1Context *s1 = avctx->priv_data;
2460 MpegEncContext *s = &s1->mpeg_enc_ctx;
2461
36b58e85 2462 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
855127bc
FB
2463 return 0;
2464
2e7b4c84
IK
2465#ifdef HAVE_XVMC
2466 if(s->avctx->xvmc_acceleration)
2467 XVMC_field_end(s);
2468#endif
de6d9b64 2469 /* end of slice reached */
db6e7795 2470 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
de6d9b64 2471 /* end of image */
1e491e29 2472
51929fd3 2473 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
0426af31 2474
7bc9090a 2475 ff_er_frame_end(s);
de6d9b64
FB
2476
2477 MPV_frame_end(s);
2478
4e00e76b 2479 if (s->pict_type == B_TYPE || s->low_delay) {
8e937a4a 2480 *pict= *(AVFrame*)s->current_picture_ptr;
0c9bbaec 2481 ff_print_debug_info(s, pict);
de6d9b64 2482 } else {
1e491e29 2483 s->picture_number++;
de6d9b64
FB
2484 /* latency of 1 frame for I and P frames */
2485 /* XXX: use another variable than picture_number */
80097bbf 2486 if (s->last_picture_ptr != NULL) {
8e937a4a 2487 *pict= *(AVFrame*)s->last_picture_ptr;
0c9bbaec 2488 ff_print_debug_info(s, pict);
de6d9b64 2489 }
de6d9b64 2490 }
ff862be5 2491
db6e7795 2492 return 1;
de6d9b64 2493 } else {
db6e7795 2494 return 0;
de6d9b64
FB
2495 }
2496}
2497
2498static int mpeg1_decode_sequence(AVCodecContext *avctx,
5f0f7713 2499 const uint8_t *buf, int buf_size)
de6d9b64
FB
2500{
2501 Mpeg1Context *s1 = avctx->priv_data;
2502 MpegEncContext *s = &s1->mpeg_enc_ctx;
5ac47683 2503 int width,height;
a6b9ffbf 2504 int i, v, j;
fb4a4a56 2505
68f593b4 2506 init_get_bits(&s->gb, buf, buf_size*8);
de6d9b64 2507
5ac47683
IK
2508 width = get_bits(&s->gb, 12);
2509 height = get_bits(&s->gb, 12);
2510 if (width <= 0 || height <= 0 ||
2511 (width % 2) != 0 || (height % 2) != 0)
2512 return -1;
945f15b7 2513 s->aspect_ratio_info= get_bits(&s->gb, 4);
32e7b91a
FB
2514 if (s->aspect_ratio_info == 0)
2515 return -1;
de6d9b64 2516 s->frame_rate_index = get_bits(&s->gb, 4);
8d52ec7e 2517 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
de6d9b64
FB
2518 return -1;
2519 s->bit_rate = get_bits(&s->gb, 18) * 400;
612476ef 2520 if (get_bits1(&s->gb) == 0) /* marker */
de6d9b64 2521 return -1;
5ac47683
IK
2522 s->width = width;
2523 s->height = height;
de6d9b64 2524
0368c72d 2525 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
612476ef 2526 skip_bits(&s->gb, 1);
de6d9b64
FB
2527
2528 /* get matrix */
612476ef 2529 if (get_bits1(&s->gb)) {
de6d9b64
FB
2530 for(i=0;i<64;i++) {
2531 v = get_bits(&s->gb, 8);
e6dc9c6f
MN
2532 if(v==0){
2533 av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
2534 return -1;
2535 }
a6b9ffbf 2536 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
60832448
FB
2537 s->intra_matrix[j] = v;
2538 s->chroma_intra_matrix[j] = v;
de6d9b64 2539 }
25ed7f92
FB
2540#ifdef DEBUG
2541 dprintf("intra matrix present\n");
2542 for(i=0;i<64;i++)
a6b9ffbf 2543 dprintf(" %d", s->intra_matrix[s->dsp.idct_permutation[i]);
25ed7f92
FB
2544 printf("\n");
2545#endif
de6d9b64
FB
2546 } else {
2547 for(i=0;i<64;i++) {
a6b9ffbf 2548 j = s->dsp.idct_permutation[i];
adc09b2e 2549 v = ff_mpeg1_default_intra_matrix[i];
2ad1516a
MN
2550 s->intra_matrix[j] = v;
2551 s->chroma_intra_matrix[j] = v;
de6d9b64
FB
2552 }
2553 }
612476ef 2554 if (get_bits1(&s->gb)) {
de6d9b64
FB
2555 for(i=0;i<64;i++) {
2556 v = get_bits(&s->gb, 8);
e6dc9c6f
MN
2557 if(v==0){
2558 av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
2559 return -1;
2560 }
a6b9ffbf 2561 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
d7e9533a
MN
2562 s->inter_matrix[j] = v;
2563 s->chroma_inter_matrix[j] = v;
de6d9b64 2564 }
25ed7f92
FB
2565#ifdef DEBUG
2566 dprintf("non intra matrix present\n");
2567 for(i=0;i<64;i++)
a6b9ffbf 2568 dprintf(" %d", s->inter_matrix[s->dsp.idct_permutation[i]);
25ed7f92
FB
2569 printf("\n");
2570#endif
de6d9b64
FB
2571 } else {
2572 for(i=0;i<64;i++) {
b0368839 2573 int j= s->dsp.idct_permutation[i];
adc09b2e 2574 v = ff_mpeg1_default_non_intra_matrix[i];
2ad1516a
MN
2575 s->inter_matrix[j] = v;
2576 s->chroma_inter_matrix[j] = v;
de6d9b64
FB
2577 }
2578 }
e6dc9c6f
MN
2579
2580 if(show_bits(&s->gb, 23) != 0){
2581 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2582 return -1;
2583 }
de6d9b64
FB
2584
2585 /* we set mpeg2 parameters so that it emulates mpeg1 */
2586 s->progressive_sequence = 1;
2587 s->progressive_frame = 1;
2588 s->picture_structure = PICT_FRAME;
2589 s->frame_pred_frame_dct = 1;
4eaad9c0 2590 s->chroma_format = 1;
029911d1 2591 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
fb4a4a56 2592 avctx->sub_id = 1; /* indicates mpeg1 */
a6b9ffbf
IK
2593 s->out_format = FMT_MPEG1;
2594 s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER
248a189a 2595 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
0368c72d
MN
2596
2597 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2598 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2599 s->avctx->rc_buffer_size, s->bit_rate);
2600
de6d9b64
FB
2601 return 0;
2602}
2603
e94bc100
MN
2604static int vcr2_init_sequence(AVCodecContext *avctx)
2605{
2606 Mpeg1Context *s1 = avctx->priv_data;
2607 MpegEncContext *s = &s1->mpeg_enc_ctx;
008f0851 2608 int i, v;
e94bc100
MN
2609
2610 /* start new mpeg1 context decoding */
2611 s->out_format = FMT_MPEG1;
2612 if (s1->mpeg_enc_ctx_allocated) {
2613 MPV_common_end(s);
2614 }
2615 s->width = avctx->width;
2616 s->height = avctx->height;
2617 avctx->has_b_frames= 0; //true?
ff862be5 2618 s->low_delay= 1;
2e7b4c84 2619
530d5740
IK
2620 if(avctx->xvmc_acceleration){
2621 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2622 }else{
2623 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2624 }
2625
2e7b4c84 2626 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
a579db0c
IK
2627 if( avctx->idct_algo == FF_IDCT_AUTO )
2628 avctx->idct_algo = FF_IDCT_SIMPLE;
e94bc100
MN
2629
2630 if (MPV_common_init(s) < 0)
2631 return -1;
a579db0c
IK
2632 exchange_uv(s);//common init reset pblocks, so we swap them here
2633 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
e94bc100
MN
2634 s1->mpeg_enc_ctx_allocated = 1;
2635
2636 for(i=0;i<64;i++) {
2637 int j= s->dsp.idct_permutation[i];
2638 v = ff_mpeg1_default_intra_matrix[i];
2639 s->intra_matrix[j] = v;
2640 s->chroma_intra_matrix[j] = v;
2641
2642 v = ff_mpeg1_default_non_intra_matrix[i];
2643 s->inter_matrix[j] = v;
2644 s->chroma_inter_matrix[j] = v;
2645 }
2646
e94bc100
MN
2647 s->progressive_sequence = 1;
2648 s->progressive_frame = 1;
2649 s->picture_structure = PICT_FRAME;
2650 s->frame_pred_frame_dct = 1;
4eaad9c0 2651 s->chroma_format = 1;
029911d1 2652 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
008f0851 2653 avctx->sub_id = 2; /* indicates mpeg2 */
e94bc100
MN
2654 return 0;
2655}
2656
2657
e2f9490e
FB
2658static void mpeg_decode_user_data(AVCodecContext *avctx,
2659 const uint8_t *buf, int buf_size)
2660{
2661 const uint8_t *p;
2662 int len, flags;
2663 p = buf;
2664 len = buf_size;
2665
2666 /* we parse the DTG active format information */
2667 if (len >= 5 &&
2668 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2669 flags = p[4];
2670 p += 5;
2671 len -= 5;
2672 if (flags & 0x80) {
2673 /* skip event id */
2674 if (len < 2)
2675 return;
2676 p += 2;
2677 len -= 2;
2678 }
2679 if (flags & 0x40) {
2680 if (len < 1)
2681 return;
2682 avctx->dtg_active_format = p[0] & 0x0f;
2683 }
2684 }
2685}
2686
5ac47683
IK
2687static void mpeg_decode_gop(AVCodecContext *avctx,
2688 const uint8_t *buf, int buf_size){
2689 Mpeg1Context *s1 = avctx->priv_data;
2690 MpegEncContext *s = &s1->mpeg_enc_ctx;
2691
2692 int drop_frame_flag;
2693 int time_code_hours, time_code_minutes;
2694 int time_code_seconds, time_code_pictures;
2695 int broken_link;
2696
2697 init_get_bits(&s->gb, buf, buf_size*8);
2698
2699 drop_frame_flag = get_bits1(&s->gb);
2700
2701 time_code_hours=get_bits(&s->gb,5);
2702 time_code_minutes = get_bits(&s->gb,6);
2703 skip_bits1(&s->gb);//marker bit
2704 time_code_seconds = get_bits(&s->gb,6);
2705 time_code_pictures = get_bits(&s->gb,6);
2706
2707 /*broken_link indicate that after editing the
2708 reference frames of the first B-Frames after GOP I-Frame
2709 are missing (open gop)*/
2710 broken_link = get_bits1(&s->gb);
2711
2712 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2713 av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n",
2714 time_code_hours, time_code_minutes, time_code_seconds,
2715 time_code_pictures, broken_link);
2716}
80097bbf
MN
2717/**
2718 * finds the end of the current frame in the bitstream.
2719 * @return the position of the first byte of the next frame, or -1
2720 */
e4cb187d
MN
2721int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
2722{
80097bbf
MN
2723 int i;
2724 uint32_t state;
2725
2726 state= pc->state;
2727
2728 i=0;
2729 if(!pc->frame_start_found){
2730 for(i=0; i<buf_size; i++){
2731 state= (state<<8) | buf[i];
2732 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2733 i++;
2734 pc->frame_start_found=1;
2735 break;
2736 }
2737 }
2738 }
2739
2740 if(pc->frame_start_found){
e4cb187d
MN
2741 /* EOF considered as end of frame */
2742 if (buf_size == 0)
2743 return 0;
80097bbf
MN
2744 for(; i<buf_size; i++){
2745 state= (state<<8) | buf[i];
2746 if((state&0xFFFFFF00) == 0x100){
2747 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2748 pc->frame_start_found=0;
2749 pc->state=-1;
2750 return i-3;
2751 }
2752 }
2753 }
2754 }
2755 pc->state= state;
bb463d81 2756 return END_NOT_FOUND;
80097bbf
MN
2757}
2758
de6d9b64
FB
2759/* handle buffering and image synchronisation */
2760static int mpeg_decode_frame(AVCodecContext *avctx,
2761 void *data, int *data_size,
0c1a9eda 2762 uint8_t *buf, int buf_size)
de6d9b64
FB
2763{
2764 Mpeg1Context *s = avctx->priv_data;
5f0f7713
ZK
2765 const uint8_t *buf_end;
2766 const uint8_t *buf_ptr;
80097bbf 2767 int ret, start_code, input_size;
492cd3a9 2768 AVFrame *picture = data;
1cb0edb4 2769 MpegEncContext *s2 = &s->mpeg_enc_ctx;
de6d9b64
FB
2770 dprintf("fill_buffer\n");
2771
6cfe51d9
WG
2772 if (buf_size == 0) {
2773 /* special case for last picture */
2774 if (s2->low_delay==0 && s2->next_picture_ptr) {
2775 *picture= *(AVFrame*)s2->next_picture_ptr;
2776 s2->next_picture_ptr= NULL;
1e491e29 2777
6cfe51d9
WG
2778 *data_size = sizeof(AVFrame);
2779 }
de6d9b64
FB
2780 return 0;
2781 }
2782
80097bbf 2783 if(s2->flags&CODEC_FLAG_TRUNCATED){
e4cb187d 2784 int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size);
80097bbf 2785
e4cb187d 2786 if( ff_combine_frame(&s2->parse_context, next, &buf, &buf_size) < 0 )
80097bbf
MN
2787 return buf_size;
2788 }
2789
de6d9b64
FB
2790 buf_ptr = buf;
2791 buf_end = buf + buf_size;
e0a3d744
J
2792
2793#if 0
2794 if (s->repeat_field % 2 == 1) {
1cb0edb4
J
2795 s->repeat_field++;
2796 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
e0a3d744
J
2797 // s2->picture_number, s->repeat_field);
2798 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2799 *data_size = sizeof(AVPicture);
2800 goto the_end;
2801 }
1cb0edb4 2802 }
e0a3d744 2803#endif
e94bc100
MN
2804
2805 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
2806 vcr2_init_sequence(avctx);
c62c07d3
MN
2807
2808 s->slice_count= 0;
2809
80097bbf 2810 for(;;) {
de6d9b64 2811 /* find start next code */
80097bbf 2812 start_code = find_start_code(&buf_ptr, buf_end);
cfcff636 2813 if (start_code < 0){
80de6a80 2814 if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
c62c07d3
MN
2815 if(avctx->thread_count > 1){
2816 int i;
2817
2818 avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count);
2819 for(i=0; i<s->slice_count; i++)
2820 s2->error_count += s2->thread_context[i]->error_count;
2821 }
80de6a80 2822 if (slice_end(avctx, picture)) {
248a189a 2823 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
80de6a80
MN
2824 *data_size = sizeof(AVPicture);
2825 }
db6e7795 2826 }
cfcff636 2827 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
de6d9b64 2828 }
cf713bb8
MN
2829
2830 input_size = buf_end - buf_ptr;
2831
2832 if(avctx->debug & FF_DEBUG_STARTCODE){
7906085f 2833 av_log(avctx, AV_LOG_DEBUG, "%3X at %zd left %d\n", start_code, buf_ptr-buf, input_size);
cf713bb8 2834 }
80097bbf 2835
de6d9b64 2836 /* prepare data for next start code */
de6d9b64
FB
2837 switch(start_code) {
2838 case SEQ_START_CODE:
80097bbf 2839 mpeg1_decode_sequence(avctx, buf_ptr,
5f0f7713 2840 input_size);
de6d9b64
FB
2841 break;
2842
2843 case PICTURE_START_CODE:
2844 /* we have a complete image : we try to decompress it */
2845 mpeg1_decode_picture(avctx,
5f0f7713 2846 buf_ptr, input_size);
de6d9b64
FB
2847 break;
2848 case EXT_START_CODE:
2849 mpeg_decode_extension(avctx,
80097bbf 2850 buf_ptr, input_size);
e2f9490e
FB
2851 break;
2852 case USER_START_CODE:
2853 mpeg_decode_user_data(avctx,
80097bbf 2854 buf_ptr, input_size);
de6d9b64 2855 break;
05fd1577 2856 case GOP_START_CODE:
8be014e0 2857 s2->first_field=0;
5ac47683
IK
2858 mpeg_decode_gop(avctx,
2859 buf_ptr, input_size);
05fd1577 2860 break;
de6d9b64
FB
2861 default:
2862 if (start_code >= SLICE_MIN_START_CODE &&
d9cb5429 2863 start_code <= SLICE_MAX_START_CODE) {
c62c07d3 2864 int mb_y= start_code - SLICE_MIN_START_CODE;
945f15b7
MN
2865
2866 /* skip b frames if we dont have reference frames */
b536d0aa 2867 if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
945f15b7
MN
2868 /* skip b frames if we are in a hurry */
2869 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
2870 /* skip everything if we are in a hurry>=5 */
2871 if(avctx->hurry_up>=5) break;
80097bbf 2872
37b787f1 2873 if (!s->mpeg_enc_ctx_allocated) break;
0dfd33c3
MN
2874
2875 if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
2876 if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
2877 break;
2878 }
c62c07d3
MN
2879
2880 if(s2->first_slice){
2881 s2->first_slice=0;
2882 if(mpeg_field_start(s2) < 0)
2883 return -1;
2884 }
2885
2886 if(avctx->thread_count > 1){
2887 int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
2888 if(threshold <= mb_y){
2889 MpegEncContext *thread_context= s2->thread_context[s->slice_count];
2890
2891 thread_context->start_mb_y= mb_y;
2892 thread_context->end_mb_y = s2->mb_height;
2893 if(s->slice_count){
2894 s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
2895 ff_update_duplicate_context(thread_context, s2);
2896 }
2897 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2898 s->slice_count++;
2899 }
2900 buf_ptr += 2; //FIXME add minimum num of bytes per slice
db6e7795 2901 }else{
c62c07d3
MN
2902 ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
2903 emms_c();
2904
2905 if(ret < 0){
2906 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2907 ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
2908 }else{
2909 ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END);
2910 }
de6d9b64
FB
2911 }
2912 }
2913 break;
2914 }
de6d9b64 2915 }
de6d9b64
FB
2916}
2917
2918static int mpeg_decode_end(AVCodecContext *avctx)
2919{
2920 Mpeg1Context *s = avctx->priv_data;
2921
2922 if (s->mpeg_enc_ctx_allocated)
2923 MPV_common_end(&s->mpeg_enc_ctx);
2924 return 0;
2925}
2926
922bc38d
MN
2927AVCodec mpeg1video_decoder = {
2928 "mpeg1video",
de6d9b64
FB
2929 CODEC_TYPE_VIDEO,
2930 CODEC_ID_MPEG1VIDEO,
2931 sizeof(Mpeg1Context),
2932 mpeg_decode_init,
2933 NULL,
2934 mpeg_decode_end,
2935 mpeg_decode_frame,
d7425f59 2936 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
922bc38d
MN
2937 .flush= ff_mpeg_flush,
2938};
2939
2940AVCodec mpeg2video_decoder = {
2941 "mpeg2video",
2942 CODEC_TYPE_VIDEO,
2943 CODEC_ID_MPEG2VIDEO,
2944 sizeof(Mpeg1Context),
2945 mpeg_decode_init,
2946 NULL,
2947 mpeg_decode_end,
2948 mpeg_decode_frame,
2949 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
c512b303
IK
2950 .flush= ff_mpeg_flush,
2951};
2952
2953//legacy decoder
2954AVCodec mpegvideo_decoder = {
2955 "mpegvideo",
2956 CODEC_TYPE_VIDEO,
2957 CODEC_ID_MPEG2VIDEO,
2958 sizeof(Mpeg1Context),
2959 mpeg_decode_init,
2960 NULL,
2961 mpeg_decode_end,
2962 mpeg_decode_frame,
2963 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
7a06ff14 2964 .flush= ff_mpeg_flush,
de6d9b64 2965};
2e7b4c84 2966
2c492e94
MN
2967#ifdef CONFIG_ENCODERS
2968
2969AVCodec mpeg1video_encoder = {
2970 "mpeg1video",
2971 CODEC_TYPE_VIDEO,
2972 CODEC_ID_MPEG1VIDEO,
2973 sizeof(MpegEncContext),
2974 encode_init,
2975 MPV_encode_picture,
2976 MPV_encode_end,
8d52ec7e 2977 .supported_framerates= frame_rate_tab+1,
77e6c403 2978 .capabilities= CODEC_CAP_DELAY,
2c492e94
MN
2979};
2980
2981#ifdef CONFIG_RISKY
2982
2983AVCodec mpeg2video_encoder = {
2984 "mpeg2video",
2985 CODEC_TYPE_VIDEO,
2986 CODEC_ID_MPEG2VIDEO,
2987 sizeof(MpegEncContext),
2988 encode_init,
2989 MPV_encode_picture,
2990 MPV_encode_end,
8d52ec7e 2991 .supported_framerates= frame_rate_tab+1,
77e6c403 2992 .capabilities= CODEC_CAP_DELAY,
2c492e94
MN
2993};
2994#endif
2995#endif
2996
2e7b4c84
IK
2997#ifdef HAVE_XVMC
2998static int mpeg_mc_decode_init(AVCodecContext *avctx){
2999 Mpeg1Context *s;
3000
715731a3
IK
3001 if( avctx->thread_count > 1)
3002 return -1;
2e7b4c84
IK
3003 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
3004 return -1;
a579db0c 3005 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
2e7b4c84 3006 dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
a579db0c 3007 }
2e7b4c84
IK
3008 mpeg_decode_init(avctx);
3009 s = avctx->priv_data;
3010
3011 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
a579db0c 3012 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
2e7b4c84
IK
3013
3014 return 0;
3015}
3016
3017AVCodec mpeg_xvmc_decoder = {
3018 "mpegvideo_xvmc",
3019 CODEC_TYPE_VIDEO,
3020 CODEC_ID_MPEG2VIDEO_XVMC,
3021 sizeof(Mpeg1Context),
3022 mpeg_mc_decode_init,
3023 NULL,
3024 mpeg_decode_end,
3025 mpeg_decode_frame,
5e5c247a
IK
3026 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL,
3027 .flush= ff_mpeg_flush,
2e7b4c84
IK
3028};
3029
3030#endif
c3bf0288
MN
3031
3032/* this is ugly i know, but the alternative is too make
3033 hundreds of vars global and prefix them with ff_mpeg1_
3034 which is far uglier. */
3035#include "mdec.c"