* DV decoding/encoding now supports MultiThreading for up to 324 CPUs ;-)
[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;
426b8061 245 int n, 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{
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361 s->y_dc_scale_table=
362 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
363}
f004ca1c 364
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365void ff_mpeg1_clean_buffers(MpegEncContext *s){
366 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
367 s->last_dc[1] = s->last_dc[0];
368 s->last_dc[2] = s->last_dc[0];
369 memset(s->last_mv, 0, sizeof(s->last_mv));
370}
371
7604246d 372#ifdef CONFIG_ENCODERS
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373
374void ff_mpeg1_encode_slice_header(MpegEncContext *s){
375 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
376 put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
377 put_bits(&s->pb, 1, 0); /* slice extra information */
378}
379
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380void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
381{
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382 mpeg1_encode_sequence_header(s);
383
384 /* mpeg1 picture header */
385 put_header(s, PICTURE_START_CODE);
386 /* temporal reference */
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387
388 // RAL: s->picture_number instead of s->fake_picture_number
389 put_bits(&s->pb, 10, (s->picture_number -
de6d9b64 390 s->gop_picture_number) & 0x3ff);
de6d9b64 391 put_bits(&s->pb, 3, s->pict_type);
d60a8f85 392
fe455f33 393 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
d60a8f85 394 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
de6d9b64 395
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396 // RAL: Forward f_code also needed for B frames
397 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
de6d9b64 398 put_bits(&s->pb, 1, 0); /* half pel coordinates */
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399 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
400 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
401 else
402 put_bits(&s->pb, 3, 7); /* forward_f_code */
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403 }
404
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405 // RAL: Backward f_code necessary for B frames
406 if (s->pict_type == B_TYPE) {
407 put_bits(&s->pb, 1, 0); /* half pel coordinates */
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408 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
409 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
410 else
411 put_bits(&s->pb, 3, 7); /* backward_f_code */
029911d1 412 }
63b15e55 413
de6d9b64 414 put_bits(&s->pb, 1, 0); /* extra bit picture */
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415
416 s->frame_pred_frame_dct = 1;
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417 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
418 put_header(s, EXT_START_CODE);
419 put_bits(&s->pb, 4, 8); //pic ext
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420 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
421 put_bits(&s->pb, 4, s->f_code);
422 put_bits(&s->pb, 4, s->f_code);
423 }else{
424 put_bits(&s->pb, 8, 255);
425 }
426 if (s->pict_type == B_TYPE) {
427 put_bits(&s->pb, 4, s->b_code);
428 put_bits(&s->pb, 4, s->b_code);
429 }else{
430 put_bits(&s->pb, 8, 255);
431 }
029911d1 432 put_bits(&s->pb, 2, s->intra_dc_precision);
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433
434 assert(s->picture_structure == PICT_FRAME);
435 put_bits(&s->pb, 2, s->picture_structure);
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436 if (s->progressive_sequence) {
437 put_bits(&s->pb, 1, 0); /* no repeat */
438 } else {
439 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
440 }
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441 /* XXX: optimize the generation of this flag with entropy
442 measures */
443 s->frame_pred_frame_dct = s->progressive_sequence;
444
445 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
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446 put_bits(&s->pb, 1, s->concealment_motion_vectors);
447 put_bits(&s->pb, 1, s->q_scale_type);
448 put_bits(&s->pb, 1, s->intra_vlc_format);
449 put_bits(&s->pb, 1, s->alternate_scan);
450 put_bits(&s->pb, 1, s->repeat_first_field);
451 put_bits(&s->pb, 1, s->chroma_420_type=1);
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452 s->progressive_frame = s->progressive_sequence;
453 put_bits(&s->pb, 1, s->progressive_frame);
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454 put_bits(&s->pb, 1, 0); //composite_display_flag
455 }
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456 if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
457 int i;
458
459 put_header(s, USER_START_CODE);
460 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
461 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
462 }
463 }
029911d1 464
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465 s->mb_y=0;
466 ff_mpeg1_encode_slice_header(s);
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467}
468
3ab5b8cc 469static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
bb198e19 470 int has_mv, int field_motion)
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471{
472 put_bits(&s->pb, n, bits);
473 if (!s->frame_pred_frame_dct) {
474 if (has_mv)
bb198e19 475 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
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476 put_bits(&s->pb, 1, s->interlaced_dct);
477 }
478}
479
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480void mpeg1_encode_mb(MpegEncContext *s,
481 DCTELEM block[6][64],
482 int motion_x, int motion_y)
483{
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484 int i, cbp;
485 const int mb_x = s->mb_x;
486 const int mb_y = s->mb_y;
487 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
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488
489 /* compute cbp */
490 cbp = 0;
491 for(i=0;i<6;i++) {
492 if (s->block_last_index[i] >= 0)
493 cbp |= 1 << (5 - i);
494 }
bb198e19 495
029911d1 496 if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
bb198e19 497 ((s->pict_type == P_TYPE && s->mv_type == MV_TYPE_16X16 && (motion_x | motion_y) == 0) ||
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MN
498 (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) |
499 ((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 500 s->mb_skip_run++;
d87c0267 501 s->qscale -= s->dquant;
49733979
MN
502 s->skip_count++;
503 s->misc_bits++;
504 s->last_bits++;
bb198e19
MN
505 if(s->pict_type == P_TYPE){
506 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
507 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
508 }
de6d9b64 509 } else {
9b8709d1
MN
510 if(first_mb){
511 assert(s->mb_skip_run == 0);
512 encode_mb_skip_run(s, s->mb_x);
513 }else{
514 encode_mb_skip_run(s, s->mb_skip_run);
de6d9b64 515 }
de6d9b64
FB
516
517 if (s->pict_type == I_TYPE) {
d87c0267 518 if(s->dquant && cbp){
bb198e19 519 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
d87c0267
MN
520 put_bits(&s->pb, 5, s->qscale);
521 }else{
bb198e19 522 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
d87c0267
MN
523 s->qscale -= s->dquant;
524 }
49733979
MN
525 s->misc_bits+= get_bits_diff(s);
526 s->i_count++;
63b15e55
MN
527 } else if (s->mb_intra) {
528 if(s->dquant && cbp){
bb198e19 529 put_mb_modes(s, 6, 0x01, 0, 0);
63b15e55
MN
530 put_bits(&s->pb, 5, s->qscale);
531 }else{
bb198e19 532 put_mb_modes(s, 5, 0x03, 0, 0);
63b15e55
MN
533 s->qscale -= s->dquant;
534 }
535 s->misc_bits+= get_bits_diff(s);
536 s->i_count++;
bb198e19 537 memset(s->last_mv, 0, sizeof(s->last_mv));
63b15e55 538 } else if (s->pict_type == P_TYPE) {
bb198e19 539 if(s->mv_type == MV_TYPE_16X16){
de6d9b64 540 if (cbp != 0) {
bb198e19 541 if ((motion_x|motion_y) == 0) {
d87c0267 542 if(s->dquant){
bb198e19 543 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
d87c0267
MN
544 put_bits(&s->pb, 5, s->qscale);
545 }else{
bb198e19 546 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
d87c0267 547 }
49733979 548 s->misc_bits+= get_bits_diff(s);
de6d9b64 549 } else {
d87c0267 550 if(s->dquant){
bb198e19 551 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
d87c0267
MN
552 put_bits(&s->pb, 5, s->qscale);
553 }else{
bb198e19 554 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
d87c0267 555 }
49733979 556 s->misc_bits+= get_bits_diff(s);
63b15e55
MN
557 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
558 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
49733979 559 s->mv_bits+= get_bits_diff(s);
de6d9b64
FB
560 }
561 } else {
562 put_bits(&s->pb, 3, 1); /* motion only */
3ab5b8cc
FB
563 if (!s->frame_pred_frame_dct)
564 put_bits(&s->pb, 2, 2); /* motion_type: frame */
bb198e19 565 s->misc_bits+= get_bits_diff(s);
63b15e55
MN
566 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
567 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
d87c0267 568 s->qscale -= s->dquant;
49733979 569 s->mv_bits+= get_bits_diff(s);
de6d9b64 570 }
bb198e19
MN
571 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
572 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
573 }else{
574 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
575
576 if (cbp) {
577 if(s->dquant){
578 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
579 put_bits(&s->pb, 5, s->qscale);
580 }else{
581 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
63b15e55 582 }
bb198e19
MN
583 } else {
584 put_bits(&s->pb, 3, 1); /* motion only */
585 put_bits(&s->pb, 2, 1); /* motion_type: field */
63b15e55 586 s->qscale -= s->dquant;
bb198e19
MN
587 }
588 s->misc_bits+= get_bits_diff(s);
589 for(i=0; i<2; i++){
590 put_bits(&s->pb, 1, s->field_select[0][i]);
591 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
592 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
593 s->last_mv[0][i][0]= s->mv[0][i][0];
594 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
595 }
596 s->mv_bits+= get_bits_diff(s);
597 }
598 if(cbp)
461cd5bf 599 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
bb198e19
MN
600 s->f_count++;
601 } else{
602 static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
603
604 if(s->mv_type == MV_TYPE_16X16){
605 if (cbp){ // With coded bloc pattern
606 if (s->dquant) {
607 if(s->mv_dir == MV_DIR_FORWARD)
608 put_mb_modes(s, 6, 3, 1, 0);
609 else
610 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
611 put_bits(&s->pb, 5, s->qscale);
612 } else {
613 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
614 }
615 }else{ // No coded bloc pattern
616 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
617 if (!s->frame_pred_frame_dct)
618 put_bits(&s->pb, 2, 2); /* motion_type: frame */
619 s->qscale -= s->dquant;
620 }
621 s->misc_bits += get_bits_diff(s);
622 if (s->mv_dir&MV_DIR_FORWARD){
623 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
624 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
625 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
626 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
627 s->f_count++;
628 }
629 if (s->mv_dir&MV_DIR_BACKWARD){
630 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
631 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
632 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
633 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
634 s->b_count++;
635 }
636 }else{
637 assert(s->mv_type == MV_TYPE_FIELD);
638 assert(!s->frame_pred_frame_dct);
639 if (cbp){ // With coded bloc pattern
640 if (s->dquant) {
641 if(s->mv_dir == MV_DIR_FORWARD)
642 put_mb_modes(s, 6, 3, 1, 1);
643 else
644 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
645 put_bits(&s->pb, 5, s->qscale);
646 } else {
647 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
63b15e55 648 }
bb198e19
MN
649 }else{ // No coded bloc pattern
650 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
651 put_bits(&s->pb, 2, 1); /* motion_type: field */
652 s->qscale -= s->dquant;
653 }
654 s->misc_bits += get_bits_diff(s);
655 if (s->mv_dir&MV_DIR_FORWARD){
656 for(i=0; i<2; i++){
657 put_bits(&s->pb, 1, s->field_select[0][i]);
658 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
659 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
660 s->last_mv[0][i][0]= s->mv[0][i][0];
661 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
662 }
663 s->f_count++;
664 }
665 if (s->mv_dir&MV_DIR_BACKWARD){
666 for(i=0; i<2; i++){
667 put_bits(&s->pb, 1, s->field_select[1][i]);
668 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
669 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
670 s->last_mv[1][i][0]= s->mv[1][i][0];
671 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
672 }
673 s->b_count++;
674 }
de6d9b64 675 }
bb198e19
MN
676 s->mv_bits += get_bits_diff(s);
677 if(cbp)
461cd5bf 678 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
bb198e19 679 }
de6d9b64
FB
680 for(i=0;i<6;i++) {
681 if (cbp & (1 << (5 - i))) {
682 mpeg1_encode_block(s, block[i], i);
683 }
684 }
9b8709d1 685 s->mb_skip_run = 0;
49733979
MN
686 if(s->mb_intra)
687 s->i_tex_bits+= get_bits_diff(s);
688 else
689 s->p_tex_bits+= get_bits_diff(s);
de6d9b64 690 }
de6d9b64
FB
691}
692
63b15e55
MN
693// RAL: Parameter added: f_or_b_code
694static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
de6d9b64
FB
695{
696 int code, bit_size, l, m, bits, range, sign;
697
698 if (val == 0) {
699 /* zero vector */
700 code = 0;
701 put_bits(&s->pb,
702 mbMotionVectorTable[0][1],
703 mbMotionVectorTable[0][0]);
704 } else {
63b15e55 705 bit_size = f_or_b_code - 1;
de6d9b64
FB
706 range = 1 << bit_size;
707 /* modulo encoding */
708 l = 16 * range;
709 m = 2 * l;
710 if (val < -l) {
711 val += m;
712 } else if (val >= l) {
713 val -= m;
714 }
715
716 if (val >= 0) {
717 val--;
718 code = (val >> bit_size) + 1;
719 bits = val & (range - 1);
720 sign = 0;
721 } else {
722 val = -val;
723 val--;
724 code = (val >> bit_size) + 1;
725 bits = val & (range - 1);
726 sign = 1;
727 }
63b15e55
MN
728
729 assert(code > 0 && code <= 16);
730
de6d9b64
FB
731 put_bits(&s->pb,
732 mbMotionVectorTable[code][1],
733 mbMotionVectorTable[code][0]);
63b15e55 734
de6d9b64
FB
735 put_bits(&s->pb, 1, sign);
736 if (bit_size > 0) {
737 put_bits(&s->pb, bit_size, bits);
738 }
739 }
740}
741
8f8402e4 742void ff_mpeg1_encode_init(MpegEncContext *s)
11ce8834
MN
743{
744 static int done=0;
8f8402e4
MN
745
746 common_init(s);
747
11ce8834
MN
748 if(!done){
749 int f_code;
750 int mv;
8f8402e4 751 int i;
11ce8834
MN
752
753 done=1;
8f8402e4 754 init_rl(&rl_mpeg1);
c442d75c 755
8f8402e4
MN
756 for(i=0; i<64; i++)
757 {
758 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
759 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
760 }
c442d75c
MN
761
762 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
8f8402e4
MN
763
764 /* build unified dc encoding tables */
765 for(i=-255; i<256; i++)
766 {
767 int adiff, index;
768 int bits, code;
769 int diff=i;
770
771 adiff = ABS(diff);
772 if(diff<0) diff--;
773 index = vlc_dc_table[adiff];
774
775 bits= vlc_dc_lum_bits[index] + index;
776 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
777 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
778
779 bits= vlc_dc_chroma_bits[index] + index;
780 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
781 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
782 }
783
30952237
MN
784 mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
785
11ce8834
MN
786 for(f_code=1; f_code<=MAX_FCODE; f_code++){
787 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
788 int len;
789
790 if(mv==0) len= mbMotionVectorTable[0][1];
791 else{
792 int val, bit_size, range, code;
793
794 bit_size = s->f_code - 1;
795 range = 1 << bit_size;
796
797 val=mv;
798 if (val < 0)
799 val = -val;
800 val--;
801 code = (val >> bit_size) + 1;
802 if(code<17){
803 len= mbMotionVectorTable[code][1] + 1 + bit_size;
804 }else{
805 len= mbMotionVectorTable[16][1] + 2 + bit_size;
806 }
807 }
808
809 mv_penalty[f_code][mv+MAX_MV]= len;
810 }
811 }
812
813
814 for(f_code=MAX_FCODE; f_code>0; f_code--){
815 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
816 fcode_tab[mv+MAX_MV]= f_code;
817 }
818 }
819 }
1457ab52 820 s->me.mv_penalty= mv_penalty;
11ce8834 821 s->fcode_tab= fcode_tab;
029911d1
MN
822 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
823 s->min_qcoeff=-255;
824 s->max_qcoeff= 255;
825 }else{
826 s->min_qcoeff=-2047;
827 s->max_qcoeff= 2047;
828 }
c442d75c 829 s->intra_ac_vlc_length=
e5021fff
MN
830 s->inter_ac_vlc_length=
831 s->intra_ac_vlc_last_length=
832 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
11ce8834 833}
8f8402e4 834
de6d9b64
FB
835static inline void encode_dc(MpegEncContext *s, int diff, int component)
836{
de6d9b64 837 if (component == 0) {
f004ca1c
MN
838 put_bits(
839 &s->pb,
840 mpeg1_lum_dc_uni[diff+255]&0xFF,
841 mpeg1_lum_dc_uni[diff+255]>>8);
de6d9b64 842 } else {
f004ca1c
MN
843 put_bits(
844 &s->pb,
845 mpeg1_chr_dc_uni[diff+255]&0xFF,
846 mpeg1_chr_dc_uni[diff+255]>>8);
de6d9b64
FB
847 }
848}
849
850static void mpeg1_encode_block(MpegEncContext *s,
851 DCTELEM *block,
852 int n)
853{
854 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
855 int code, component;
80feb2a2 856// RLTable *rl = &rl_mpeg1;
de6d9b64
FB
857
858 last_index = s->block_last_index[n];
859
860 /* DC coef */
861 if (s->mb_intra) {
862 component = (n <= 3 ? 0 : n - 4 + 1);
863 dc = block[0]; /* overflow is impossible */
864 diff = dc - s->last_dc[component];
865 encode_dc(s, diff, component);
866 s->last_dc[component] = dc;
867 i = 1;
029911d1
MN
868/*
869 if (s->intra_vlc_format)
870 rl = &rl_mpeg2;
871 else
872 rl = &rl_mpeg1;
873*/
de6d9b64
FB
874 } else {
875 /* encode the first coefficient : needs to be done here because
876 it is handled slightly differently */
877 level = block[0];
878 if (abs(level) == 1) {
0c1a9eda 879 code = ((uint32_t)level >> 31); /* the sign bit */
de6d9b64
FB
880 put_bits(&s->pb, 2, code | 0x02);
881 i = 1;
882 } else {
883 i = 0;
884 last_non_zero = -1;
885 goto next_coef;
886 }
887 }
888
889 /* now quantify & encode AC coefs */
890 last_non_zero = i - 1;
80feb2a2 891
de6d9b64 892 for(;i<=last_index;i++) {
2ad1516a 893 j = s->intra_scantable.permutated[i];
de6d9b64
FB
894 level = block[j];
895 next_coef:
896#if 0
897 if (level != 0)
898 dprintf("level[%d]=%d\n", i, level);
899#endif
900 /* encode using VLC */
901 if (level != 0) {
902 run = i - last_non_zero - 1;
2ad1516a
MN
903
904 alevel= level;
905 MASK_ABS(sign, alevel)
906 sign&=1;
907
80feb2a2 908// code = get_rl_index(rl, 0, run, alevel);
c442d75c 909 if (alevel <= mpeg1_max_level[0][run]){
80feb2a2 910 code= mpeg1_index_run[0][run] + alevel - 1;
80feb2a2
MN
911 /* store the vlc & sign at once */
912 put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
de6d9b64 913 } else {
80feb2a2
MN
914 /* escape seems to be pretty rare <5% so i dont optimize it */
915 put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
de6d9b64
FB
916 /* escape: only clip in this case */
917 put_bits(&s->pb, 6, run);
029911d1
MN
918 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
919 if (alevel < 128) {
920 put_bits(&s->pb, 8, level & 0xff);
de6d9b64 921 } else {
029911d1
MN
922 if (level < 0) {
923 put_bits(&s->pb, 16, 0x8001 + level + 255);
924 } else {
925 put_bits(&s->pb, 16, level & 0xffff);
926 }
de6d9b64 927 }
029911d1
MN
928 }else{
929 put_bits(&s->pb, 12, level & 0xfff);
de6d9b64
FB
930 }
931 }
932 last_non_zero = i;
933 }
934 }
935 /* end of block */
936 put_bits(&s->pb, 2, 0x2);
937}
7604246d 938#endif //CONFIG_ENCODERS
de6d9b64
FB
939
940/******************************************/
941/* decoding */
942
943static VLC dc_lum_vlc;
944static VLC dc_chroma_vlc;
945static VLC mv_vlc;
946static VLC mbincr_vlc;
947static VLC mb_ptype_vlc;
948static VLC mb_btype_vlc;
949static VLC mb_pat_vlc;
950
c3bf0288 951static void init_vlcs()
de6d9b64
FB
952{
953 static int done = 0;
954
955 if (!done) {
915bbac6 956 done = 1;
de6d9b64 957
9ac7ecd6 958 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
de6d9b64
FB
959 vlc_dc_lum_bits, 1, 1,
960 vlc_dc_lum_code, 2, 2);
9ac7ecd6 961 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
de6d9b64
FB
962 vlc_dc_chroma_bits, 1, 1,
963 vlc_dc_chroma_code, 2, 2);
8ed2ddb2 964 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
de6d9b64
FB
965 &mbMotionVectorTable[0][1], 2, 1,
966 &mbMotionVectorTable[0][0], 2, 1);
9c00c3af 967 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
de6d9b64
FB
968 &mbAddrIncrTable[0][1], 2, 1,
969 &mbAddrIncrTable[0][0], 2, 1);
461cd5bf 970 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
de6d9b64
FB
971 &mbPatTable[0][1], 2, 1,
972 &mbPatTable[0][0], 2, 1);
973
7bc9090a 974 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
de6d9b64
FB
975 &table_mb_ptype[0][1], 2, 1,
976 &table_mb_ptype[0][0], 2, 1);
7bc9090a 977 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
de6d9b64
FB
978 &table_mb_btype[0][1], 2, 1,
979 &table_mb_btype[0][0], 2, 1);
980 init_rl(&rl_mpeg1);
981 init_rl(&rl_mpeg2);
4f68b084
MN
982
983 init_2d_vlc_rl(&rl_mpeg1);
984 init_2d_vlc_rl(&rl_mpeg2);
de6d9b64
FB
985 }
986}
987
988static inline int get_dmv(MpegEncContext *s)
989{
612476ef
A
990 if(get_bits1(&s->gb))
991 return 1 - (get_bits1(&s->gb) << 1);
de6d9b64
FB
992 else
993 return 0;
994}
995
0ee50938
FB
996static inline int get_qscale(MpegEncContext *s)
997{
7062fad6 998 int qscale = get_bits(&s->gb, 5);
51929fd3
MN
999 if (s->q_scale_type) {
1000 return non_linear_qscale[qscale];
1001 } else {
1002 return qscale << 1;
0ee50938 1003 }
0ee50938
FB
1004}
1005
de6d9b64
FB
1006/* motion type (for mpeg2) */
1007#define MT_FIELD 1
1008#define MT_FRAME 2
1009#define MT_16X8 2
1010#define MT_DMV 3
1011
1012static int mpeg_decode_mb(MpegEncContext *s,
5e5c247a 1013 DCTELEM block[12][64])
de6d9b64 1014{
d2975f8d 1015 int i, j, k, cbp, val, mb_type, motion_type;
de6d9b64 1016
de6d9b64
FB
1017 dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1018
f943e138
MN
1019 assert(s->mb_skiped==0);
1020
9b8709d1 1021 if (s->mb_skip_run-- != 0) {
7bc9090a 1022 if(s->pict_type == I_TYPE){
9b879566 1023 av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
7bc9090a
MN
1024 return -1;
1025 }
1026
de6d9b64
FB
1027 /* skip mb */
1028 s->mb_intra = 0;
5e5c247a 1029 for(i=0;i<12;i++)
de6d9b64 1030 s->block_last_index[i] = -1;
4c9544d0
MN
1031 if(s->picture_structure == PICT_FRAME)
1032 s->mv_type = MV_TYPE_16X16;
1033 else
1034 s->mv_type = MV_TYPE_FIELD;
de6d9b64
FB
1035 if (s->pict_type == P_TYPE) {
1036 /* if P type, zero motion vector is implied */
1037 s->mv_dir = MV_DIR_FORWARD;
1038 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1039 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
25ed7f92 1040 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
4c9544d0 1041 s->field_select[0][0]= s->picture_structure - 1;
f943e138 1042 s->mb_skiped = 1;
7bc9090a 1043 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
1044 } else {
1045 /* if B type, reuse previous vectors and directions */
1046 s->mv[0][0][0] = s->last_mv[0][0][0];
1047 s->mv[0][0][1] = s->last_mv[0][0][1];
1048 s->mv[1][0][0] = s->last_mv[1][0][0];
1049 s->mv[1][0][1] = s->last_mv[1][0][1];
f943e138 1050
7bc9090a
MN
1051 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1052 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
1053// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1054
f943e138
MN
1055 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1056 s->mb_skiped = 1;
de6d9b64 1057 }
59b571c1 1058
de6d9b64
FB
1059 return 0;
1060 }
1061
1062 switch(s->pict_type) {
1063 default:
1064 case I_TYPE:
612476ef 1065 if (get_bits1(&s->gb) == 0) {
e94bc100 1066 if (get_bits1(&s->gb) == 0){
9b879566 1067 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
de6d9b64 1068 return -1;
e94bc100 1069 }
7bc9090a 1070 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
de6d9b64 1071 } else {
7bc9090a 1072 mb_type = MB_TYPE_INTRA;
de6d9b64
FB
1073 }
1074 break;
1075 case P_TYPE:
8ed2ddb2 1076 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
9ac7ecd6 1077 if (mb_type < 0){
9b879566 1078 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
de6d9b64 1079 return -1;
9ac7ecd6 1080 }
7bc9090a 1081 mb_type = ptype2mb_type[ mb_type ];
de6d9b64
FB
1082 break;
1083 case B_TYPE:
8ed2ddb2 1084 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
9ac7ecd6 1085 if (mb_type < 0){
9b879566 1086 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
de6d9b64 1087 return -1;
9ac7ecd6 1088 }
7bc9090a 1089 mb_type = btype2mb_type[ mb_type ];
de6d9b64
FB
1090 break;
1091 }
1092 dprintf("mb_type=%x\n", mb_type);
7bc9090a
MN
1093// motion_type = 0; /* avoid warning */
1094 if (IS_INTRA(mb_type)) {
1095 /* compute dct type */
1096 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1097 !s->frame_pred_frame_dct) {
1098 s->interlaced_dct = get_bits1(&s->gb);
1099 }
de6d9b64 1100
7bc9090a
MN
1101 if (IS_QUANT(mb_type))
1102 s->qscale = get_qscale(s);
1103
de6d9b64
FB
1104 if (s->concealment_motion_vectors) {
1105 /* just parse them */
1106 if (s->picture_structure != PICT_FRAME)
612476ef 1107 skip_bits1(&s->gb); /* field select */
daab3296
MN
1108
1109 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1110 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1111 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1112 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1113
7bc9090a 1114 skip_bits1(&s->gb); /* marker */
daab3296
MN
1115 }else
1116 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
de6d9b64 1117 s->mb_intra = 1;
a579db0c
IK
1118#ifdef HAVE_XVMC
1119 //one 1 we memcpy blocks in xvmcvideo
1120 if(s->avctx->xvmc_acceleration > 1){
1121 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1122 if(s->swap_uv){
1123 exchange_uv(s);
1124 }
1125 }
1126#endif
7bc9090a 1127
029911d1 1128 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
5e5c247a 1129 for(i=0;i<4+(1<<s->chroma_format);i++) {
a579db0c 1130 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
7bc9090a
MN
1131 return -1;
1132 }
1133 } else {
1134 for(i=0;i<6;i++) {
a579db0c 1135 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
7bc9090a
MN
1136 return -1;
1137 }
1138 }
de6d9b64 1139 } else {
7bc9090a 1140 if (mb_type & MB_TYPE_ZERO_MV){
b40cd4e0 1141 assert(mb_type & MB_TYPE_CBP);
7bc9090a
MN
1142
1143 /* compute dct type */
1144 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1145 !s->frame_pred_frame_dct) {
1146 s->interlaced_dct = get_bits1(&s->gb);
1147 }
1148
1149 if (IS_QUANT(mb_type))
1150 s->qscale = get_qscale(s);
1151
1152 s->mv_dir = MV_DIR_FORWARD;
4c9544d0
MN
1153 if(s->picture_structure == PICT_FRAME)
1154 s->mv_type = MV_TYPE_16X16;
1155 else{
1156 s->mv_type = MV_TYPE_FIELD;
1157 mb_type |= MB_TYPE_INTERLACED;
1158 s->field_select[0][0]= s->picture_structure - 1;
1159 }
7bc9090a
MN
1160 s->last_mv[0][0][0] = 0;
1161 s->last_mv[0][0][1] = 0;
1162 s->last_mv[0][1][0] = 0;
1163 s->last_mv[0][1][1] = 0;
1164 s->mv[0][0][0] = 0;
1165 s->mv[0][0][1] = 0;
1166 }else{
1167 assert(mb_type & MB_TYPE_L0L1);
1168//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1169 /* get additionnal motion vector type */
1170 if (s->frame_pred_frame_dct)
1171 motion_type = MT_FRAME;
1172 else{
1173 motion_type = get_bits(&s->gb, 2);
1174 }
1175
1176 /* compute dct type */
1177 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
b40cd4e0 1178 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
7bc9090a
MN
1179 s->interlaced_dct = get_bits1(&s->gb);
1180 }
1181
1182 if (IS_QUANT(mb_type))
1183 s->qscale = get_qscale(s);
1184
1185 /* motion vectors */
1186 s->mv_dir = 0;
1187 for(i=0;i<2;i++) {
1188 if (USES_LIST(mb_type, i)) {
1189 s->mv_dir |= (MV_DIR_FORWARD >> i);
1190 dprintf("motion_type=%d\n", motion_type);
1191 switch(motion_type) {
1192 case MT_FRAME: /* or MT_16X8 */
1193 if (s->picture_structure == PICT_FRAME) {
1194 /* MT_FRAME */
1195 mb_type |= MB_TYPE_16x16;
1196 s->mv_type = MV_TYPE_16X16;
1197 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1198 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1199 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1200 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
de6d9b64 1201 /* full_pel: only for mpeg1 */
7bc9090a
MN
1202 if (s->full_pel[i]){
1203 s->mv[i][0][0] <<= 1;
1204 s->mv[i][0][1] <<= 1;
1205 }
1206 } else {
1207 /* MT_16X8 */
26f548a7 1208 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
7bc9090a
MN
1209 s->mv_type = MV_TYPE_16X8;
1210 for(j=0;j<2;j++) {
1211 s->field_select[i][j] = get_bits1(&s->gb);
1212 for(k=0;k<2;k++) {
1213 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1214 s->last_mv[i][j][k]);
1215 s->last_mv[i][j][k] = val;
1216 s->mv[i][j][k] = val;
1217 }
1218 }
de6d9b64 1219 }
7bc9090a
MN
1220 break;
1221 case MT_FIELD:
1222 s->mv_type = MV_TYPE_FIELD;
1223 if (s->picture_structure == PICT_FRAME) {
1224 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1225 for(j=0;j<2;j++) {
1226 s->field_select[i][j] = get_bits1(&s->gb);
1227 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1228 s->last_mv[i][j][0]);
1229 s->last_mv[i][j][0] = val;
1230 s->mv[i][j][0] = val;
1231 dprintf("fmx=%d\n", val);
1232 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1233 s->last_mv[i][j][1] >> 1);
1234 s->last_mv[i][j][1] = val << 1;
1235 s->mv[i][j][1] = val;
1236 dprintf("fmy=%d\n", val);
1237 }
1238 } else {
26f548a7 1239 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
7bc9090a 1240 s->field_select[i][0] = get_bits1(&s->gb);
de6d9b64
FB
1241 for(k=0;k<2;k++) {
1242 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
7bc9090a
MN
1243 s->last_mv[i][0][k]);
1244 s->last_mv[i][0][k] = val;
1245 s->last_mv[i][1][k] = val;
1246 s->mv[i][0][k] = val;
de6d9b64
FB
1247 }
1248 }
7bc9090a
MN
1249 break;
1250 case MT_DMV:
1251 {
1252 int dmx, dmy, mx, my, m;
1253
1254 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1255 s->last_mv[i][0][0]);
1256 s->last_mv[i][0][0] = mx;
1257 s->last_mv[i][1][0] = mx;
1258 dmx = get_dmv(s);
1259 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1260 s->last_mv[i][0][1] >> 1);
1261 dmy = get_dmv(s);
1262 s->mv_type = MV_TYPE_DMV;
1dff7d56
IK
1263
1264
1265 s->last_mv[i][0][1] = my<<1;
1266 s->last_mv[i][1][1] = my<<1;
1267
1268 s->mv[i][0][0] = mx;
1269 s->mv[i][0][1] = my;
1270 s->mv[i][1][0] = mx;//not used
1271 s->mv[i][1][1] = my;//not used
1272
7bc9090a
MN
1273 if (s->picture_structure == PICT_FRAME) {
1274 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1275
1dff7d56 1276 //m = 1 + 2 * s->top_field_first;
7bc9090a 1277 m = s->top_field_first ? 1 : 3;
1dff7d56 1278
7bc9090a 1279 /* top -> top pred */
1dff7d56
IK
1280 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1281 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
7bc9090a 1282 m = 4 - m;
7bc9090a
MN
1283 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1284 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1285 } else {
1286 mb_type |= MB_TYPE_16x16;
1287
1dff7d56
IK
1288 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1289 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1290 if(s->picture_structure == PICT_TOP_FIELD)
1291 s->mv[i][2][1]--;
1292 else
1293 s->mv[i][2][1]++;
7bc9090a 1294 }
de6d9b64 1295 }
7bc9090a 1296 break;
26f548a7
MN
1297 default:
1298 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1299 return -1;
de6d9b64 1300 }
de6d9b64
FB
1301 }
1302 }
1303 }
7bc9090a
MN
1304
1305 s->mb_intra = 0;
de6d9b64 1306
b40cd4e0 1307 if (HAS_CBP(mb_type)) {
7bc9090a 1308 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
494c56d3 1309 if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){
9b879566 1310 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
7bc9090a 1311 return -1;
de6d9b64 1312 }
5e5c247a
IK
1313 if(s->chroma_format == 2){//CHROMA422
1314 cbp|= ( get_bits(&s->gb,2) ) << 6;
1315 }else
1316 if(s->chroma_format > 2){//CHROMA444
1317 cbp|= ( get_bits(&s->gb,6) ) << 6;
1318 }
7bc9090a 1319
a579db0c
IK
1320#ifdef HAVE_XVMC
1321 //on 1 we memcpy blocks in xvmcvideo
1322 if(s->avctx->xvmc_acceleration > 1){
1323 XVMC_pack_pblocks(s,cbp);
1324 if(s->swap_uv){
1325 exchange_uv(s);
1326 }
1327 }
1328#endif
1329
029911d1 1330 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
7bc9090a 1331 for(i=0;i<6;i++) {
5e5c247a 1332 if (cbp & (1<<(5-i)) ) {
a579db0c 1333 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
7bc9090a
MN
1334 return -1;
1335 } else {
1336 s->block_last_index[i] = -1;
1337 }
5e5c247a
IK
1338 }
1339 if (s->chroma_format >= 2) {
1340 if (s->chroma_format == 2) {//CHROMA_422)
1341 for(i=6;i<8;i++) {
1342 if (cbp & (1<<(6+7-i)) ) {
1343 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1344 return -1;
1345 } else {
1346 s->block_last_index[i] = -1;
1347 }
1348 }
1349 }else{ /*CHROMA_444*/
1350 for(i=6;i<12;i++) {
1351 if (cbp & (1<<(6+11-i)) ) {
1352 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1353 return -1;
1354 } else {
1355 s->block_last_index[i] = -1;
1356 }
1357 }
1358 }
de6d9b64 1359 }
7bc9090a
MN
1360 } else {
1361 for(i=0;i<6;i++) {
1362 if (cbp & 32) {
a579db0c 1363 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
7bc9090a
MN
1364 return -1;
1365 } else {
1366 s->block_last_index[i] = -1;
1367 }
1368 cbp+=cbp;
a0201736 1369 }
de6d9b64 1370 }
7bc9090a
MN
1371 }else{
1372 for(i=0;i<6;i++)
1373 s->block_last_index[i] = -1;
de6d9b64
FB
1374 }
1375 }
7bc9090a
MN
1376
1377 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1378
de6d9b64
FB
1379 return 0;
1380}
1381
1382/* as h263, but only 17 codes */
1383static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1384{
05858889 1385 int code, sign, val, l, shift;
de6d9b64 1386
8ed2ddb2 1387 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
de6d9b64
FB
1388 if (code == 0) {
1389 return pred;
1390 }
7bc9090a
MN
1391 if (code < 0) {
1392 return 0xffff;
1393 }
1394
612476ef 1395 sign = get_bits1(&s->gb);
de6d9b64 1396 shift = fcode - 1;
05858889
B
1397 val = code;
1398 if (shift) {
1399 val = (val - 1) << shift;
de6d9b64 1400 val |= get_bits(&s->gb, shift);
05858889
B
1401 val++;
1402 }
de6d9b64
FB
1403 if (sign)
1404 val = -val;
1405 val += pred;
1406
1407 /* modulo decoding */
7bc9090a 1408 l = 1 << (shift+4);
05858889 1409 val = ((val + l)&(l*2-1)) - l;
de6d9b64
FB
1410 return val;
1411}
1412
c3bf0288 1413static inline int decode_dc(GetBitContext *gb, int component)
de6d9b64
FB
1414{
1415 int code, diff;
1416
1417 if (component == 0) {
c3bf0288 1418 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
de6d9b64 1419 } else {
c3bf0288 1420 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
de6d9b64 1421 }
9ac7ecd6 1422 if (code < 0){
9b879566 1423 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
de6d9b64 1424 return 0xffff;
9ac7ecd6 1425 }
de6d9b64
FB
1426 if (code == 0) {
1427 diff = 0;
1428 } else {
c3bf0288 1429 diff = get_xbits(gb, code);
de6d9b64
FB
1430 }
1431 return diff;
1432}
1433
a0201736 1434static inline int mpeg1_decode_block_intra(MpegEncContext *s,
de6d9b64
FB
1435 DCTELEM *block,
1436 int n)
1437{
1438 int level, dc, diff, i, j, run;
a0201736 1439 int component;
de6d9b64 1440 RLTable *rl = &rl_mpeg1;
0c1a9eda
ZK
1441 uint8_t * const scantable= s->intra_scantable.permutated;
1442 const uint16_t *quant_matrix= s->intra_matrix;
a0201736 1443 const int qscale= s->qscale;
de6d9b64 1444
a0201736
MN
1445 /* DC coef */
1446 component = (n <= 3 ? 0 : n - 4 + 1);
c3bf0288 1447 diff = decode_dc(&s->gb, component);
a0201736
MN
1448 if (diff >= 0xffff)
1449 return -1;
1450 dc = s->last_dc[component];
1451 dc += diff;
1452 s->last_dc[component] = dc;
1453 block[0] = dc<<3;
1454 dprintf("dc=%d diff=%d\n", dc, diff);
1455 i = 0;
1456 {
1457 OPEN_READER(re, &s->gb);
1458 /* now quantify & encode AC coefs */
1459 for(;;) {
1460 UPDATE_CACHE(re, &s->gb);
1461 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1462
1463 if(level == 127){
1464 break;
1465 } else if(level != 0) {
1466 i += run;
1467 j = scantable[i];
51929fd3 1468 level= (level*qscale*quant_matrix[j])>>4;
a0201736
MN
1469 level= (level-1)|1;
1470 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1471 LAST_SKIP_BITS(re, &s->gb, 1);
1472 } else {
1473 /* escape */
1474 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1475 UPDATE_CACHE(re, &s->gb);
1476 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1477 if (level == -128) {
1478 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1479 } else if (level == 0) {
1480 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1481 }
1482 i += run;
1483 j = scantable[i];
1484 if(level<0){
1485 level= -level;
51929fd3 1486 level= (level*qscale*quant_matrix[j])>>4;
a0201736
MN
1487 level= (level-1)|1;
1488 level= -level;
1489 }else{
51929fd3 1490 level= (level*qscale*quant_matrix[j])>>4;
a0201736
MN
1491 level= (level-1)|1;
1492 }
1493 }
1494 if (i > 63){
9b879566 1495 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
a0201736
MN
1496 return -1;
1497 }
1498
1499 block[j] = level;
1500 }
1501 CLOSE_READER(re, &s->gb);
1502 }
1503 s->block_last_index[n] = i;
1504 return 0;
1505}
1506
1507static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1508 DCTELEM *block,
1509 int n)
1510{
1511 int level, i, j, run;
1512 RLTable *rl = &rl_mpeg1;
0c1a9eda
ZK
1513 uint8_t * const scantable= s->intra_scantable.permutated;
1514 const uint16_t *quant_matrix= s->inter_matrix;
a0201736
MN
1515 const int qscale= s->qscale;
1516
1517 {
8db1a1dd
MN
1518 int v;
1519 OPEN_READER(re, &s->gb);
a0201736 1520 i = -1;
de6d9b64 1521 /* special case for the first coef. no need to add a second vlc table */
8db1a1dd
MN
1522 UPDATE_CACHE(re, &s->gb);
1523 v= SHOW_UBITS(re, &s->gb, 2);
de6d9b64 1524 if (v & 2) {
3729c912 1525 LAST_SKIP_BITS(re, &s->gb, 2);
51929fd3 1526 level= (3*qscale*quant_matrix[0])>>5;
a0201736
MN
1527 level= (level-1)|1;
1528 if(v&1)
1529 level= -level;
3729c912 1530 block[0] = level;
a0201736 1531 i++;
de6d9b64 1532 }
3729c912 1533
a0201736
MN
1534 /* now quantify & encode AC coefs */
1535 for(;;) {
1536 UPDATE_CACHE(re, &s->gb);
1537 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1538
1539 if(level == 127){
1540 break;
1541 } else if(level != 0) {
1542 i += run;
1543 j = scantable[i];
51929fd3 1544 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
a0201736
MN
1545 level= (level-1)|1;
1546 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1547 LAST_SKIP_BITS(re, &s->gb, 1);
1548 } else {
1549 /* escape */
1550 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1551 UPDATE_CACHE(re, &s->gb);
1552 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1553 if (level == -128) {
1554 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1555 } else if (level == 0) {
1556 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1557 }
1558 i += run;
1559 j = scantable[i];
1560 if(level<0){
1561 level= -level;
51929fd3 1562 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
a0201736
MN
1563 level= (level-1)|1;
1564 level= -level;
1565 }else{
51929fd3 1566 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
a0201736
MN
1567 level= (level-1)|1;
1568 }
de6d9b64 1569 }
a0201736 1570 if (i > 63){
9b879566 1571 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
a0201736
MN
1572 return -1;
1573 }
1574
1575 block[j] = level;
de6d9b64 1576 }
a0201736 1577 CLOSE_READER(re, &s->gb);
de6d9b64 1578 }
a0201736 1579 s->block_last_index[n] = i;
de6d9b64
FB
1580 return 0;
1581}
1582
1583/* Also does unquantization here, since I will never support mpeg2
1584 encoding */
3729c912
MN
1585static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1586 DCTELEM *block,
1587 int n)
de6d9b64
FB
1588{
1589 int level, i, j, run;
de6d9b64 1590 RLTable *rl = &rl_mpeg1;
0c1a9eda
ZK
1591 uint8_t * const scantable= s->intra_scantable.permutated;
1592 const uint16_t *quant_matrix;
3729c912 1593 const int qscale= s->qscale;
de6d9b64
FB
1594 int mismatch;
1595
de6d9b64
FB
1596 mismatch = 1;
1597
1598 {
8db1a1dd
MN
1599 int v;
1600 OPEN_READER(re, &s->gb);
3729c912 1601 i = -1;
8db1a1dd 1602 if (n < 4)
3729c912 1603 quant_matrix = s->inter_matrix;
de6d9b64 1604 else
3729c912 1605 quant_matrix = s->chroma_inter_matrix;
8db1a1dd 1606
de6d9b64 1607 /* special case for the first coef. no need to add a second vlc table */
8db1a1dd
MN
1608 UPDATE_CACHE(re, &s->gb);
1609 v= SHOW_UBITS(re, &s->gb, 2);
de6d9b64 1610 if (v & 2) {
3729c912
MN
1611 LAST_SKIP_BITS(re, &s->gb, 2);
1612 level= (3*qscale*quant_matrix[0])>>5;
1613 if(v&1)
1614 level= -level;
1615 block[0] = level;
1616 mismatch ^= level;
1617 i++;
de6d9b64 1618 }
de6d9b64 1619
3729c912
MN
1620 /* now quantify & encode AC coefs */
1621 for(;;) {
1622 UPDATE_CACHE(re, &s->gb);
1623 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1624
1625 if(level == 127){
1626 break;
1627 } else if(level != 0) {
1628 i += run;
1629 j = scantable[i];
1630 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1631 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1632 LAST_SKIP_BITS(re, &s->gb, 1);
1633 } else {
1634 /* escape */
1635 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1636 UPDATE_CACHE(re, &s->gb);
1637 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1638
1639 i += run;
1640 j = scantable[i];
1641 if(level<0){
1642 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1643 level= -level;
1644 }else{
1645 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1646 }
1647 }
1648 if (i > 63){
9b879566 1649 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
3729c912
MN
1650 return -1;
1651 }
1652
1653 mismatch ^= level;
1654 block[j] = level;
25ed7f92 1655 }
3729c912 1656 CLOSE_READER(re, &s->gb);
de6d9b64
FB
1657 }
1658 block[63] ^= (mismatch & 1);
3729c912 1659
de6d9b64
FB
1660 s->block_last_index[n] = i;
1661 return 0;
1662}
1663
3729c912
MN
1664static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1665 DCTELEM *block,
1666 int n)
de6d9b64
FB
1667{
1668 int level, dc, diff, i, j, run;
3729c912 1669 int component;
de6d9b64 1670 RLTable *rl;
0c1a9eda
ZK
1671 uint8_t * const scantable= s->intra_scantable.permutated;
1672 const uint16_t *quant_matrix;
3729c912 1673 const int qscale= s->qscale;
de6d9b64
FB
1674 int mismatch;
1675
de6d9b64 1676 /* DC coef */
3729c912
MN
1677 if (n < 4){
1678 quant_matrix = s->intra_matrix;
1679 component = 0;
1680 }else{
1681 quant_matrix = s->chroma_intra_matrix;
5e5c247a 1682 component = (n&1) + 1;
3729c912 1683 }
c3bf0288 1684 diff = decode_dc(&s->gb, component);
de6d9b64
FB
1685 if (diff >= 0xffff)
1686 return -1;
1687 dc = s->last_dc[component];
1688 dc += diff;
1689 s->last_dc[component] = dc;
1690 block[0] = dc << (3 - s->intra_dc_precision);
1691 dprintf("dc=%d\n", block[0]);
d753173a 1692 mismatch = block[0] ^ 1;
3729c912 1693 i = 0;
de6d9b64
FB
1694 if (s->intra_vlc_format)
1695 rl = &rl_mpeg2;
1696 else
1697 rl = &rl_mpeg1;
25ed7f92 1698
3729c912
MN
1699 {
1700 OPEN_READER(re, &s->gb);
1701 /* now quantify & encode AC coefs */
1702 for(;;) {
1703 UPDATE_CACHE(re, &s->gb);
1704 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1705
1706 if(level == 127){
1707 break;
1708 } else if(level != 0) {
1709 i += run;
1710 j = scantable[i];
1711 level= (level*qscale*quant_matrix[j])>>4;
1712 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1713 LAST_SKIP_BITS(re, &s->gb, 1);
1714 } else {
1715 /* escape */
1716 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1717 UPDATE_CACHE(re, &s->gb);
1718 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1719 i += run;
1720 j = scantable[i];
1721 if(level<0){
1722 level= (-level*qscale*quant_matrix[j])>>4;
1723 level= -level;
1724 }else{
1725 level= (level*qscale*quant_matrix[j])>>4;
1726 }
1727 }
1728 if (i > 63){
9b879566 1729 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
3729c912
MN
1730 return -1;
1731 }
1732
1733 mismatch^= level;
1734 block[j] = level;
9ac7ecd6 1735 }
3729c912 1736 CLOSE_READER(re, &s->gb);
de6d9b64 1737 }
3729c912
MN
1738 block[63]^= mismatch&1;
1739
de6d9b64
FB
1740 s->block_last_index[n] = i;
1741 return 0;
1742}
1743
de6d9b64
FB
1744typedef struct Mpeg1Context {
1745 MpegEncContext mpeg_enc_ctx;
de6d9b64 1746 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1cb0edb4 1747 int repeat_field; /* true if we must repeat the field */
fa384dcc 1748 AVPanScan pan_scan; /** some temporary storage for the panscan */
c62c07d3 1749 int slice_count;
de6d9b64
FB
1750} Mpeg1Context;
1751
1752static int mpeg_decode_init(AVCodecContext *avctx)
1753{
1754 Mpeg1Context *s = avctx->priv_data;
8f8402e4 1755
303aebf9 1756 s->mpeg_enc_ctx.avctx= avctx;
94aec31f 1757 s->mpeg_enc_ctx.flags= avctx->flags;
303e50e6 1758 s->mpeg_enc_ctx.flags2= avctx->flags2;
8f8402e4 1759 common_init(&s->mpeg_enc_ctx);
c3bf0288 1760 init_vlcs();
de6d9b64 1761
de6d9b64 1762 s->mpeg_enc_ctx_allocated = 0;
de6d9b64 1763 s->mpeg_enc_ctx.picture_number = 0;
1cb0edb4 1764 s->repeat_field = 0;
d7e9533a 1765 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
de6d9b64
FB
1766 return 0;
1767}
1768
1769/* return the 8 bit start code value and update the search
1770 state. Return -1 if no start code found */
5f0f7713 1771static int find_start_code(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
de6d9b64 1772{
c7516a00
MN
1773 const uint8_t *buf_ptr= *pbuf_ptr;
1774
1775 buf_ptr++; //gurantees that -1 is within the array
1776 buf_end -= 2; // gurantees that +2 is within the array
de6d9b64 1777
de6d9b64 1778 while (buf_ptr < buf_end) {
c7516a00
MN
1779 if(*buf_ptr==0){
1780 while(buf_ptr < buf_end && buf_ptr[1]==0)
1781 buf_ptr++;
1782
1783 if(buf_ptr[-1] == 0 && buf_ptr[1] == 1){
1784 *pbuf_ptr = buf_ptr+3;
1785 return buf_ptr[2] + 0x100;
1786 }
de6d9b64 1787 }
c7516a00 1788 buf_ptr += 2;
de6d9b64 1789 }
c7516a00
MN
1790 buf_end += 2; //undo the hack above
1791
1792 *pbuf_ptr = buf_end;
1793 return -1;
de6d9b64
FB
1794}
1795
1796static int mpeg1_decode_picture(AVCodecContext *avctx,
5f0f7713 1797 const uint8_t *buf, int buf_size)
de6d9b64
FB
1798{
1799 Mpeg1Context *s1 = avctx->priv_data;
1800 MpegEncContext *s = &s1->mpeg_enc_ctx;
d60a8f85 1801 int ref, f_code, vbv_delay;
de6d9b64 1802
68f593b4 1803 init_get_bits(&s->gb, buf, buf_size*8);
de6d9b64
FB
1804
1805 ref = get_bits(&s->gb, 10); /* temporal ref */
1806 s->pict_type = get_bits(&s->gb, 3);
58bfafbe 1807
d60a8f85 1808 vbv_delay= get_bits(&s->gb, 16);
de6d9b64 1809 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
612476ef 1810 s->full_pel[0] = get_bits1(&s->gb);
de6d9b64
FB
1811 f_code = get_bits(&s->gb, 3);
1812 if (f_code == 0)
1813 return -1;
1814 s->mpeg_f_code[0][0] = f_code;
1815 s->mpeg_f_code[0][1] = f_code;
1816 }
1817 if (s->pict_type == B_TYPE) {
612476ef 1818 s->full_pel[1] = get_bits1(&s->gb);
de6d9b64
FB
1819 f_code = get_bits(&s->gb, 3);
1820 if (f_code == 0)
1821 return -1;
1822 s->mpeg_f_code[1][0] = f_code;
1823 s->mpeg_f_code[1][1] = f_code;
1824 }
1e491e29
MN
1825 s->current_picture.pict_type= s->pict_type;
1826 s->current_picture.key_frame= s->pict_type == I_TYPE;
d9cb5429 1827
b1b8f9fc
MN
1828// if(avctx->debug & FF_DEBUG_PICT_INFO)
1829// av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d\n", vbv_delay, ref);
1830
de6d9b64
FB
1831 s->y_dc_scale = 8;
1832 s->c_dc_scale = 8;
1833 s->first_slice = 1;
1834 return 0;
1835}
1836
1837static void mpeg_decode_sequence_extension(MpegEncContext *s)
1838{
1839 int horiz_size_ext, vert_size_ext;
baaf3f46 1840 int bit_rate_ext;
de6d9b64 1841 int frame_rate_ext_n, frame_rate_ext_d;
029911d1 1842 int level, profile;
de6d9b64 1843
029911d1
MN
1844 skip_bits(&s->gb, 1); /* profil and level esc*/
1845 profile= get_bits(&s->gb, 3);
1846 level= get_bits(&s->gb, 4);
1cb0edb4 1847 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
5e5c247a 1848 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
de6d9b64
FB
1849 horiz_size_ext = get_bits(&s->gb, 2);
1850 vert_size_ext = get_bits(&s->gb, 2);
1851 s->width |= (horiz_size_ext << 12);
1852 s->height |= (vert_size_ext << 12);
1853 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
5e5c247a 1854 s->bit_rate += (bit_rate_ext << 12) * 400;
612476ef 1855 skip_bits1(&s->gb); /* marker */
0368c72d 1856 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
e0560448 1857
945f15b7 1858 s->low_delay = get_bits1(&s->gb);
e0560448
MN
1859 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
1860
de6d9b64
FB
1861 frame_rate_ext_n = get_bits(&s->gb, 2);
1862 frame_rate_ext_d = get_bits(&s->gb, 5);
14bea432
MN
1863 av_reduce(
1864 &s->avctx->frame_rate,
1865 &s->avctx->frame_rate_base,
8d52ec7e
MN
1866 frame_rate_tab[s->frame_rate_index].num * (frame_rate_ext_n+1),
1867 frame_rate_tab[s->frame_rate_index].den * (frame_rate_ext_d+1),
14bea432
MN
1868 1<<30);
1869
de6d9b64 1870 dprintf("sequence extension\n");
029911d1 1871 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
fb4a4a56 1872 s->avctx->sub_id = 2; /* indicates mpeg2 found */
945f15b7 1873
5ff85f1d
MN
1874 if(s->aspect_ratio_info <= 1)
1875 s->avctx->sample_aspect_ratio= mpeg2_aspect[s->aspect_ratio_info];
1876 else{
1877 s->avctx->sample_aspect_ratio=
1878 av_div_q(
1879 mpeg2_aspect[s->aspect_ratio_info],
1880 (AVRational){s->width, s->height}
1881 );
1882 }
029911d1
MN
1883
1884 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
0368c72d
MN
1885 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1886 profile, level, s->avctx->rc_buffer_size, s->bit_rate);
de6d9b64
FB
1887}
1888
fa384dcc
MN
1889static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1890{
1891 MpegEncContext *s= &s1->mpeg_enc_ctx;
1892 int color_description, w, h;
1893
1894 skip_bits(&s->gb, 3); /* video format */
1895 color_description= get_bits1(&s->gb);
1896 if(color_description){
1897 skip_bits(&s->gb, 8); /* color primaries */
1898 skip_bits(&s->gb, 8); /* transfer_characteristics */
1899 skip_bits(&s->gb, 8); /* matrix_coefficients */
1900 }
1901 w= get_bits(&s->gb, 14);
1902 skip_bits(&s->gb, 1); //marker
1903 h= get_bits(&s->gb, 14);
1904 skip_bits(&s->gb, 1); //marker
1905
1906 s1->pan_scan.width= 16*w;
1907 s1->pan_scan.height=16*h;
1908
5ff85f1d
MN
1909 if(s->aspect_ratio_info > 1)
1910 s->avctx->sample_aspect_ratio=
1911 av_div_q(
1912 mpeg2_aspect[s->aspect_ratio_info],
1913 (AVRational){w, h}
1914 );
fa384dcc
MN
1915
1916 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
9b879566 1917 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
fa384dcc
MN
1918}
1919
1920static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1921{
1922 MpegEncContext *s= &s1->mpeg_enc_ctx;
1923 int i;
1924
1925 for(i=0; i<1; i++){ //FIXME count
1926 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
1927 skip_bits(&s->gb, 1); //marker
1928 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
1929 skip_bits(&s->gb, 1); //marker
1930 }
1931
1932 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
9b879566 1933 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
fa384dcc
MN
1934 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1935 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1936 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
1937 );
1938}
1939
de6d9b64
FB
1940static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1941{
60832448 1942 int i, v, j;
de6d9b64 1943
25ed7f92
FB
1944 dprintf("matrix extension\n");
1945
612476ef 1946 if (get_bits1(&s->gb)) {
de6d9b64
FB
1947 for(i=0;i<64;i++) {
1948 v = get_bits(&s->gb, 8);
b0368839 1949 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
60832448
FB
1950 s->intra_matrix[j] = v;
1951 s->chroma_intra_matrix[j] = v;
de6d9b64
FB
1952 }
1953 }
612476ef 1954 if (get_bits1(&s->gb)) {
de6d9b64
FB
1955 for(i=0;i<64;i++) {
1956 v = get_bits(&s->gb, 8);
b0368839 1957 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
d7e9533a
MN
1958 s->inter_matrix[j] = v;
1959 s->chroma_inter_matrix[j] = v;
de6d9b64
FB
1960 }
1961 }
612476ef 1962 if (get_bits1(&s->gb)) {
de6d9b64
FB
1963 for(i=0;i<64;i++) {
1964 v = get_bits(&s->gb, 8);
b0368839 1965 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
60832448 1966 s->chroma_intra_matrix[j] = v;
de6d9b64
FB
1967 }
1968 }
612476ef 1969 if (get_bits1(&s->gb)) {
de6d9b64
FB
1970 for(i=0;i<64;i++) {
1971 v = get_bits(&s->gb, 8);
b0368839 1972 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
d7e9533a 1973 s->chroma_inter_matrix[j] = v;
de6d9b64
FB
1974 }
1975 }
1976}
1977
1978static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
1979{
1980 s->full_pel[0] = s->full_pel[1] = 0;
1981 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1982 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1983 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1984 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1985 s->intra_dc_precision = get_bits(&s->gb, 2);
1986 s->picture_structure = get_bits(&s->gb, 2);
612476ef
A
1987 s->top_field_first = get_bits1(&s->gb);
1988 s->frame_pred_frame_dct = get_bits1(&s->gb);
1989 s->concealment_motion_vectors = get_bits1(&s->gb);
1990 s->q_scale_type = get_bits1(&s->gb);
1991 s->intra_vlc_format = get_bits1(&s->gb);
1992 s->alternate_scan = get_bits1(&s->gb);
1993 s->repeat_first_field = get_bits1(&s->gb);
1994 s->chroma_420_type = get_bits1(&s->gb);
1995 s->progressive_frame = get_bits1(&s->gb);
bb198e19 1996
dfb476cb
MN
1997 if(s->picture_structure == PICT_FRAME)
1998 s->first_field=0;
1999 else{
2000 s->first_field ^= 1;
7bc9090a 2001 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
dfb476cb
MN
2002 }
2003
acf44abb 2004 if(s->alternate_scan){
3d2e8cce
MN
2005 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
2006 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
acf44abb 2007 }else{
3d2e8cce
MN
2008 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
2009 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
acf44abb
MN
2010 }
2011
de6d9b64 2012 /* composite display not parsed */
1cb0edb4 2013 dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
25ed7f92 2014 dprintf("picture_structure=%d\n", s->picture_structure);
e0a3d744
J
2015 dprintf("top field first=%d\n", s->top_field_first);
2016 dprintf("repeat first field=%d\n", s->repeat_first_field);
de6d9b64 2017 dprintf("conceal=%d\n", s->concealment_motion_vectors);
25ed7f92
FB
2018 dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
2019 dprintf("alternate_scan=%d\n", s->alternate_scan);
de6d9b64 2020 dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1cb0edb4 2021 dprintf("progressive_frame=%d\n", s->progressive_frame);
de6d9b64
FB
2022}
2023
2024static void mpeg_decode_extension(AVCodecContext *avctx,
5f0f7713 2025 const uint8_t *buf, int buf_size)
de6d9b64
FB
2026{
2027 Mpeg1Context *s1 = avctx->priv_data;
2028 MpegEncContext *s = &s1->mpeg_enc_ctx;
2029 int ext_type;
2030
68f593b4 2031 init_get_bits(&s->gb, buf, buf_size*8);
de6d9b64
FB
2032
2033 ext_type = get_bits(&s->gb, 4);
2034 switch(ext_type) {
2035 case 0x1:
de6d9b64
FB
2036 mpeg_decode_sequence_extension(s);
2037 break;
fa384dcc
MN
2038 case 0x2:
2039 mpeg_decode_sequence_display_extension(s1);
2040 break;
de6d9b64 2041 case 0x3:
de6d9b64
FB
2042 mpeg_decode_quant_matrix_extension(s);
2043 break;
fa384dcc
MN
2044 case 0x7:
2045 mpeg_decode_picture_display_extension(s1);
2046 break;
de6d9b64 2047 case 0x8:
de6d9b64
FB
2048 mpeg_decode_picture_coding_extension(s);
2049 break;
2050 }
2051}
2052
a579db0c
IK
2053static void exchange_uv(MpegEncContext *s){
2054short * tmp;
2055
2056 tmp = s->pblocks[4];
2057 s->pblocks[4] = s->pblocks[5];
2058 s->pblocks[5] = tmp;
ff862be5
MN
2059}
2060
c62c07d3
MN
2061static int mpeg_field_start(MpegEncContext *s){
2062 AVCodecContext *avctx= s->avctx;
2063 Mpeg1Context *s1 = (Mpeg1Context*)s;
de6d9b64 2064
de6d9b64 2065 /* start frame decoding */
c62c07d3 2066 if(s->first_field || s->picture_structure==PICT_FRAME){
d6db1c9c 2067 if(MPV_frame_start(s, avctx) < 0)
c62c07d3 2068 return -1;
7bc9090a
MN
2069
2070 ff_er_frame_start(s);
2071
2ec23b6d 2072 /* first check if we must repeat the frame */
9ee2c20e 2073 s->current_picture_ptr->repeat_pict = 0;
2ec23b6d
MN
2074 if (s->repeat_first_field) {
2075 if (s->progressive_sequence) {
2076 if (s->top_field_first)
9ee2c20e 2077 s->current_picture_ptr->repeat_pict = 4;
2ec23b6d 2078 else
9ee2c20e 2079 s->current_picture_ptr->repeat_pict = 2;
2ec23b6d 2080 } else if (s->progressive_frame) {
9ee2c20e 2081 s->current_picture_ptr->repeat_pict = 1;
2ec23b6d
MN
2082 }
2083 }
fa384dcc
MN
2084
2085 *s->current_picture_ptr->pan_scan= s1->pan_scan;
c62c07d3 2086 }else{ //second field
b536d0aa 2087 int i;
37b787f1
MN
2088
2089 if(!s->current_picture_ptr){
9b879566 2090 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
37b787f1
MN
2091 return -1;
2092 }
2093
b536d0aa
MN
2094 for(i=0; i<4; i++){
2095 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2096 if(s->picture_structure == PICT_BOTTOM_FIELD){
2097 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2098 }
2099 }
c62c07d3 2100 }
2e7b4c84
IK
2101#ifdef HAVE_XVMC
2102// MPV_frame_start will call this function too,
2103// but we need to call it on every field
c62c07d3 2104 if(s->avctx->xvmc_acceleration)
2e7b4c84
IK
2105 XVMC_field_start(s,avctx);
2106#endif
de6d9b64 2107
c62c07d3
MN
2108 return 0;
2109}
2110
2111#define DECODE_SLICE_ERROR -1
2112#define DECODE_SLICE_OK 0
2113
2114/**
2115 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
2116 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
2117 * DECODE_SLICE_OK if this slice is ok<br>
2118 */
2119static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
5f0f7713 2120 const uint8_t **buf, int buf_size)
c62c07d3
MN
2121{
2122 MpegEncContext *s = &s1->mpeg_enc_ctx;
2123 AVCodecContext *avctx= s->avctx;
2124 int ret;
2125 const int field_pic= s->picture_structure != PICT_FRAME;
2126
2127 s->resync_mb_x=
2128 s->resync_mb_y= -1;
2129
2130 if (mb_y >= s->mb_height){
2131 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", s->mb_y, s->mb_height);
2132 return -1;
2133 }
2134
80097bbf 2135 init_get_bits(&s->gb, *buf, buf_size*8);
de6d9b64 2136
c62c07d3
MN
2137 ff_mpeg1_clean_buffers(s);
2138 s->interlaced_dct = 0;
2139
0ee50938 2140 s->qscale = get_qscale(s);
a4337a51 2141
7bc9090a 2142 if(s->qscale == 0){
9b879566 2143 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
db6e7795 2144 return -1;
7bc9090a
MN
2145 }
2146
de6d9b64 2147 /* extra slice info */
612476ef
A
2148 while (get_bits1(&s->gb) != 0) {
2149 skip_bits(&s->gb, 8);
de6d9b64 2150 }
7bc9090a 2151
ce5b7c5e 2152 s->mb_x=0;
7bc9090a 2153
ce5b7c5e
MN
2154 for(;;) {
2155 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
7bc9090a 2156 if (code < 0){
9b879566 2157 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
db6e7795 2158 return -1;
7bc9090a 2159 }
ce5b7c5e
MN
2160 if (code >= 33) {
2161 if (code == 33) {
2162 s->mb_x += 33;
2163 }
2164 /* otherwise, stuffing, nothing to do */
2165 } else {
2166 s->mb_x += code;
2167 break;
2168 }
2169 }
c62c07d3 2170
7bc9090a 2171 s->resync_mb_x= s->mb_x;
c62c07d3 2172 s->resync_mb_y= s->mb_y= mb_y;
9b8709d1 2173 s->mb_skip_run= 0;
7d1c3fc1 2174 ff_init_block_index(s);
ce5b7c5e 2175
c62c07d3
MN
2176 if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
2177 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2178 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",
2179 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],
2180 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2181 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2182 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2183 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2184 }
2185 }
2186
de6d9b64 2187 for(;;) {
a579db0c
IK
2188#ifdef HAVE_XVMC
2189 //one 1 we memcpy blocks in xvmcvideo
2190 if(s->avctx->xvmc_acceleration > 1)
2191 XVMC_init_block(s);//set s->block
2192#endif
2193
eb4b3dd3 2194 s->dsp.clear_blocks(s->block[0]);
7bc9090a 2195
b7ec19d3 2196 ret = mpeg_decode_mb(s, s->block);
332f9ac4 2197 s->chroma_qscale= s->qscale;
7bc9090a 2198
de6d9b64
FB
2199 dprintf("ret=%d\n", ret);
2200 if (ret < 0)
2201 return -1;
8d7ec294 2202
31b1ec5d
MN
2203 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
2204 const int wrap = field_pic ? 2*s->block_wrap[0] : s->block_wrap[0];
2205 int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap;
4c9544d0 2206 int motion_x, motion_y, dir, i;
31b1ec5d
MN
2207 if(field_pic && !s->first_field)
2208 xy += wrap/2;
2209
50c93f74
MN
2210 for(i=0; i<2; i++){
2211 for(dir=0; dir<2; dir++){
4c9544d0
MN
2212 if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
2213 motion_x = motion_y = 0;
2214 }else if (s->mv_type == MV_TYPE_16X16){
2215 motion_x = s->mv[dir][0][0];
2216 motion_y = s->mv[dir][0][1];
2217 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2218 motion_x = s->mv[dir][i][0];
2219 motion_y = s->mv[dir][i][1];
2220 }
2221
2222 s->current_picture.motion_val[dir][xy ][0] = motion_x;
2223 s->current_picture.motion_val[dir][xy ][1] = motion_y;
2224 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
2225 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
4c9544d0 2226 }
50c93f74 2227 xy += wrap;
7bc9090a 2228 }
7bc9090a 2229 }
8d7ec294 2230
7d1c3fc1
MN
2231 s->dest[0] += 16;
2232 s->dest[1] += 8;
2233 s->dest[2] += 8;
ce5b7c5e 2234
7d1c3fc1
MN
2235 MPV_decode_mb(s, s->block);
2236
ce5b7c5e 2237 if (++s->mb_x >= s->mb_width) {
ff862be5 2238
3bb07d61 2239 ff_draw_horiz_band(s, 16*s->mb_y, 16);
ce5b7c5e
MN
2240
2241 s->mb_x = 0;
2242 s->mb_y++;
cf713bb8
MN
2243
2244 if(s->mb_y<<field_pic >= s->mb_height){
2245 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2246
2247 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
2248 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
9b879566 2249 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d\n", left);
cf713bb8
MN
2250 return -1;
2251 }else
2252 goto eos;
2253 }
7d1c3fc1
MN
2254
2255 ff_init_block_index(s);
ce5b7c5e 2256 }
ce5b7c5e
MN
2257
2258 /* skip mb handling */
9b8709d1 2259 if (s->mb_skip_run == -1) {
ce5b7c5e 2260 /* read again increment */
9b8709d1 2261 s->mb_skip_run = 0;
ce5b7c5e
MN
2262 for(;;) {
2263 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
7bc9090a 2264 if (code < 0){
9b879566 2265 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
9c00c3af 2266 return -1;
7bc9090a 2267 }
ce5b7c5e
MN
2268 if (code >= 33) {
2269 if (code == 33) {
9b8709d1 2270 s->mb_skip_run += 33;
9c00c3af
MN
2271 }else if(code == 35){
2272 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
9b879566 2273 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
9c00c3af
MN
2274 return -1;
2275 }
2276 goto eos; /* end of slice */
ce5b7c5e
MN
2277 }
2278 /* otherwise, stuffing, nothing to do */
2279 } else {
9b8709d1 2280 s->mb_skip_run += code;
ce5b7c5e
MN
2281 break;
2282 }
2283 }
2284 }
de6d9b64 2285 }
db6e7795
MN
2286eos: // end of slice
2287 *buf += get_bits_count(&s->gb)/8 - 1;
7bc9090a 2288//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
db6e7795
MN
2289 return 0;
2290}
7bc9090a 2291
c62c07d3
MN
2292static int slice_decode_thread(AVCodecContext *c, void *arg){
2293 MpegEncContext *s= arg;
49a37411 2294 const uint8_t *buf= s->gb.buffer;
c62c07d3
MN
2295 int mb_y= s->start_mb_y;
2296
2297 s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width;
2298
2299 for(;;){
2300 int start_code, ret;
2301
2302 ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
2303 emms_c();
2304//av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2305//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);
2306 if(ret < 0){
2307 if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
2308 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);
2309 }else{
2310 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);
2311 }
2312
2313 if(s->mb_y == s->end_mb_y)
2314 return 0;
2315
2316 start_code = find_start_code(&buf, s->gb.buffer_end);
2317 mb_y= start_code - SLICE_MIN_START_CODE;
2318 if(mb_y < 0 || mb_y >= s->end_mb_y)
2319 return -1;
2320 }
2321
2322 return 0; //not reached
2323}
2324
db6e7795
MN
2325/**
2326 * handles slice ends.
2327 * @return 1 if it seems to be the last slice of
2328 */
2329static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2330{
2331 Mpeg1Context *s1 = avctx->priv_data;
2332 MpegEncContext *s = &s1->mpeg_enc_ctx;
2333
36b58e85 2334 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
855127bc
FB
2335 return 0;
2336
2e7b4c84
IK
2337#ifdef HAVE_XVMC
2338 if(s->avctx->xvmc_acceleration)
2339 XVMC_field_end(s);
2340#endif
de6d9b64 2341 /* end of slice reached */
db6e7795 2342 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
de6d9b64 2343 /* end of image */
1e491e29 2344
51929fd3 2345 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
0426af31 2346
7bc9090a 2347 ff_er_frame_end(s);
de6d9b64
FB
2348
2349 MPV_frame_end(s);
2350
4e00e76b 2351 if (s->pict_type == B_TYPE || s->low_delay) {
8e937a4a 2352 *pict= *(AVFrame*)s->current_picture_ptr;
0c9bbaec 2353 ff_print_debug_info(s, pict);
de6d9b64 2354 } else {
1e491e29 2355 s->picture_number++;
de6d9b64
FB
2356 /* latency of 1 frame for I and P frames */
2357 /* XXX: use another variable than picture_number */
80097bbf 2358 if (s->last_picture_ptr != NULL) {
8e937a4a 2359 *pict= *(AVFrame*)s->last_picture_ptr;
0c9bbaec 2360 ff_print_debug_info(s, pict);
de6d9b64 2361 }
de6d9b64 2362 }
ff862be5 2363
db6e7795 2364 return 1;
de6d9b64 2365 } else {
db6e7795 2366 return 0;
de6d9b64
FB
2367 }
2368}
2369
2370static int mpeg1_decode_sequence(AVCodecContext *avctx,
5f0f7713 2371 const uint8_t *buf, int buf_size)
de6d9b64
FB
2372{
2373 Mpeg1Context *s1 = avctx->priv_data;
2374 MpegEncContext *s = &s1->mpeg_enc_ctx;
60832448 2375 int width, height, i, v, j;
945f15b7 2376 float aspect;
fb4a4a56 2377
68f593b4 2378 init_get_bits(&s->gb, buf, buf_size*8);
de6d9b64
FB
2379
2380 width = get_bits(&s->gb, 12);
2381 height = get_bits(&s->gb, 12);
945f15b7 2382 s->aspect_ratio_info= get_bits(&s->gb, 4);
32e7b91a
FB
2383 if (s->aspect_ratio_info == 0)
2384 return -1;
2385 aspect= 1.0/mpeg1_aspect[s->aspect_ratio_info];
2386 avctx->sample_aspect_ratio= av_d2q(aspect, 255);
945f15b7 2387
de6d9b64 2388 s->frame_rate_index = get_bits(&s->gb, 4);
8d52ec7e 2389 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
de6d9b64
FB
2390 return -1;
2391 s->bit_rate = get_bits(&s->gb, 18) * 400;
612476ef 2392 if (get_bits1(&s->gb) == 0) /* marker */
de6d9b64
FB
2393 return -1;
2394 if (width <= 0 || height <= 0 ||
2395 (width % 2) != 0 || (height % 2) != 0)
2396 return -1;
2397 if (width != s->width ||
2398 height != s->height) {
2399 /* start new mpeg1 context decoding */
2400 s->out_format = FMT_MPEG1;
2401 if (s1->mpeg_enc_ctx_allocated) {
2402 MPV_common_end(s);
2403 }
2404 s->width = width;
2405 s->height = height;
4e00e76b 2406 avctx->has_b_frames= 1;
de6d9b64
FB
2407 avctx->width = width;
2408 avctx->height = height;
8d52ec7e
MN
2409 avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
2410 avctx->frame_rate_base= frame_rate_tab[s->frame_rate_index].den;
de6d9b64
FB
2411 avctx->bit_rate = s->bit_rate;
2412
530d5740
IK
2413 if(avctx->xvmc_acceleration){
2414 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2415 }else{
2416 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2417 }
2418
2e7b4c84 2419 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
a579db0c
IK
2420 if( avctx->idct_algo == FF_IDCT_AUTO )
2421 avctx->idct_algo = FF_IDCT_SIMPLE;
2e7b4c84 2422
de6d9b64
FB
2423 if (MPV_common_init(s) < 0)
2424 return -1;
de6d9b64 2425 s1->mpeg_enc_ctx_allocated = 1;
a579db0c 2426 s->swap_uv = 0;//just in case vcr2 and mpeg2 stream have been concatinated
de6d9b64
FB
2427 }
2428
0368c72d 2429 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
612476ef 2430 skip_bits(&s->gb, 1);
de6d9b64
FB
2431
2432 /* get matrix */
612476ef 2433 if (get_bits1(&s->gb)) {
de6d9b64
FB
2434 for(i=0;i<64;i++) {
2435 v = get_bits(&s->gb, 8);
e6dc9c6f
MN
2436 if(v==0){
2437 av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
2438 return -1;
2439 }
2ad1516a 2440 j = s->intra_scantable.permutated[i];
60832448
FB
2441 s->intra_matrix[j] = v;
2442 s->chroma_intra_matrix[j] = v;
de6d9b64 2443 }
25ed7f92
FB
2444#ifdef DEBUG
2445 dprintf("intra matrix present\n");
2446 for(i=0;i<64;i++)
8e1652dc 2447 dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]);
25ed7f92
FB
2448 printf("\n");
2449#endif
de6d9b64
FB
2450 } else {
2451 for(i=0;i<64;i++) {
b0368839 2452 int j= s->dsp.idct_permutation[i];
adc09b2e 2453 v = ff_mpeg1_default_intra_matrix[i];
2ad1516a
MN
2454 s->intra_matrix[j] = v;
2455 s->chroma_intra_matrix[j] = v;
de6d9b64
FB
2456 }
2457 }
612476ef 2458 if (get_bits1(&s->gb)) {
de6d9b64
FB
2459 for(i=0;i<64;i++) {
2460 v = get_bits(&s->gb, 8);
e6dc9c6f
MN
2461 if(v==0){
2462 av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
2463 return -1;
2464 }
2ad1516a 2465 j = s->intra_scantable.permutated[i];
d7e9533a
MN
2466 s->inter_matrix[j] = v;
2467 s->chroma_inter_matrix[j] = v;
de6d9b64 2468 }
25ed7f92
FB
2469#ifdef DEBUG
2470 dprintf("non intra matrix present\n");
2471 for(i=0;i<64;i++)
8e1652dc 2472 dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]);
25ed7f92
FB
2473 printf("\n");
2474#endif
de6d9b64
FB
2475 } else {
2476 for(i=0;i<64;i++) {
b0368839 2477 int j= s->dsp.idct_permutation[i];
adc09b2e 2478 v = ff_mpeg1_default_non_intra_matrix[i];
2ad1516a
MN
2479 s->inter_matrix[j] = v;
2480 s->chroma_inter_matrix[j] = v;
de6d9b64
FB
2481 }
2482 }
e6dc9c6f
MN
2483
2484 if(show_bits(&s->gb, 23) != 0){
2485 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2486 return -1;
2487 }
de6d9b64
FB
2488
2489 /* we set mpeg2 parameters so that it emulates mpeg1 */
2490 s->progressive_sequence = 1;
2491 s->progressive_frame = 1;
2492 s->picture_structure = PICT_FRAME;
2493 s->frame_pred_frame_dct = 1;
4eaad9c0 2494 s->chroma_format = 1;
029911d1 2495 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
fb4a4a56 2496 avctx->sub_id = 1; /* indicates mpeg1 */
248a189a 2497 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
0368c72d
MN
2498
2499 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2500 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2501 s->avctx->rc_buffer_size, s->bit_rate);
2502
de6d9b64
FB
2503 return 0;
2504}
2505
e94bc100
MN
2506static int vcr2_init_sequence(AVCodecContext *avctx)
2507{
2508 Mpeg1Context *s1 = avctx->priv_data;
2509 MpegEncContext *s = &s1->mpeg_enc_ctx;
008f0851 2510 int i, v;
e94bc100
MN
2511
2512 /* start new mpeg1 context decoding */
2513 s->out_format = FMT_MPEG1;
2514 if (s1->mpeg_enc_ctx_allocated) {
2515 MPV_common_end(s);
2516 }
2517 s->width = avctx->width;
2518 s->height = avctx->height;
2519 avctx->has_b_frames= 0; //true?
ff862be5 2520 s->low_delay= 1;
2e7b4c84 2521
530d5740
IK
2522 if(avctx->xvmc_acceleration){
2523 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2524 }else{
2525 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2526 }
2527
2e7b4c84 2528 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
a579db0c
IK
2529 if( avctx->idct_algo == FF_IDCT_AUTO )
2530 avctx->idct_algo = FF_IDCT_SIMPLE;
e94bc100
MN
2531
2532 if (MPV_common_init(s) < 0)
2533 return -1;
a579db0c
IK
2534 exchange_uv(s);//common init reset pblocks, so we swap them here
2535 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
e94bc100
MN
2536 s1->mpeg_enc_ctx_allocated = 1;
2537
2538 for(i=0;i<64;i++) {
2539 int j= s->dsp.idct_permutation[i];
2540 v = ff_mpeg1_default_intra_matrix[i];
2541 s->intra_matrix[j] = v;
2542 s->chroma_intra_matrix[j] = v;
2543
2544 v = ff_mpeg1_default_non_intra_matrix[i];
2545 s->inter_matrix[j] = v;
2546 s->chroma_inter_matrix[j] = v;
2547 }
2548
e94bc100
MN
2549 s->progressive_sequence = 1;
2550 s->progressive_frame = 1;
2551 s->picture_structure = PICT_FRAME;
2552 s->frame_pred_frame_dct = 1;
4eaad9c0 2553 s->chroma_format = 1;
029911d1 2554 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
008f0851 2555 avctx->sub_id = 2; /* indicates mpeg2 */
e94bc100
MN
2556 return 0;
2557}
2558
2559
e2f9490e
FB
2560static void mpeg_decode_user_data(AVCodecContext *avctx,
2561 const uint8_t *buf, int buf_size)
2562{
2563 const uint8_t *p;
2564 int len, flags;
2565 p = buf;
2566 len = buf_size;
2567
2568 /* we parse the DTG active format information */
2569 if (len >= 5 &&
2570 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2571 flags = p[4];
2572 p += 5;
2573 len -= 5;
2574 if (flags & 0x80) {
2575 /* skip event id */
2576 if (len < 2)
2577 return;
2578 p += 2;
2579 len -= 2;
2580 }
2581 if (flags & 0x40) {
2582 if (len < 1)
2583 return;
2584 avctx->dtg_active_format = p[0] & 0x0f;
2585 }
2586 }
2587}
2588
80097bbf
MN
2589/**
2590 * finds the end of the current frame in the bitstream.
2591 * @return the position of the first byte of the next frame, or -1
2592 */
2593static int mpeg1_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
2594 ParseContext *pc= &s->parse_context;
2595 int i;
2596 uint32_t state;
2597
2598 state= pc->state;
2599
2600 i=0;
2601 if(!pc->frame_start_found){
2602 for(i=0; i<buf_size; i++){
2603 state= (state<<8) | buf[i];
2604 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2605 i++;
2606 pc->frame_start_found=1;
2607 break;
2608 }
2609 }
2610 }
2611
2612 if(pc->frame_start_found){
2613 for(; i<buf_size; i++){
2614 state= (state<<8) | buf[i];
2615 if((state&0xFFFFFF00) == 0x100){
2616 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2617 pc->frame_start_found=0;
2618 pc->state=-1;
2619 return i-3;
2620 }
2621 }
2622 }
2623 }
2624 pc->state= state;
bb463d81 2625 return END_NOT_FOUND;
80097bbf
MN
2626}
2627
de6d9b64
FB
2628/* handle buffering and image synchronisation */
2629static int mpeg_decode_frame(AVCodecContext *avctx,
2630 void *data, int *data_size,
0c1a9eda 2631 uint8_t *buf, int buf_size)
de6d9b64
FB
2632{
2633 Mpeg1Context *s = avctx->priv_data;
5f0f7713
ZK
2634 const uint8_t *buf_end;
2635 const uint8_t *buf_ptr;
80097bbf 2636 int ret, start_code, input_size;
492cd3a9 2637 AVFrame *picture = data;
1cb0edb4 2638 MpegEncContext *s2 = &s->mpeg_enc_ctx;
de6d9b64
FB
2639 dprintf("fill_buffer\n");
2640
2641 *data_size = 0;
d7e9533a 2642
de6d9b64 2643 /* special case for last picture */
e9174ba4
MN
2644 if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
2645 *picture= *(AVFrame*)s2->next_picture_ptr;
2646 s2->next_picture_ptr= NULL;
1e491e29 2647
e9174ba4 2648 *data_size = sizeof(AVFrame);
de6d9b64
FB
2649 return 0;
2650 }
2651
80097bbf 2652 if(s2->flags&CODEC_FLAG_TRUNCATED){
bb463d81 2653 int next= mpeg1_find_frame_end(s2, buf, buf_size);
80097bbf
MN
2654
2655 if( ff_combine_frame(s2, next, &buf, &buf_size) < 0 )
2656 return buf_size;
2657 }
2658
de6d9b64
FB
2659 buf_ptr = buf;
2660 buf_end = buf + buf_size;
e0a3d744
J
2661
2662#if 0
2663 if (s->repeat_field % 2 == 1) {
1cb0edb4
J
2664 s->repeat_field++;
2665 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
e0a3d744
J
2666 // s2->picture_number, s->repeat_field);
2667 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2668 *data_size = sizeof(AVPicture);
2669 goto the_end;
2670 }
1cb0edb4 2671 }
e0a3d744 2672#endif
e94bc100
MN
2673
2674 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
2675 vcr2_init_sequence(avctx);
c62c07d3
MN
2676
2677 s->slice_count= 0;
2678
80097bbf 2679 for(;;) {
de6d9b64 2680 /* find start next code */
80097bbf 2681 start_code = find_start_code(&buf_ptr, buf_end);
cfcff636 2682 if (start_code < 0){
80de6a80 2683 if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
c62c07d3
MN
2684 if(avctx->thread_count > 1){
2685 int i;
2686
2687 avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count);
2688 for(i=0; i<s->slice_count; i++)
2689 s2->error_count += s2->thread_context[i]->error_count;
2690 }
80de6a80 2691 if (slice_end(avctx, picture)) {
248a189a 2692 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
80de6a80
MN
2693 *data_size = sizeof(AVPicture);
2694 }
db6e7795 2695 }
cfcff636 2696 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
de6d9b64 2697 }
cf713bb8
MN
2698
2699 input_size = buf_end - buf_ptr;
2700
2701 if(avctx->debug & FF_DEBUG_STARTCODE){
9b879566 2702 av_log(avctx, AV_LOG_DEBUG, "%3X at %d left %d\n", start_code, buf_ptr-buf, input_size);
cf713bb8 2703 }
80097bbf 2704
de6d9b64 2705 /* prepare data for next start code */
de6d9b64
FB
2706 switch(start_code) {
2707 case SEQ_START_CODE:
80097bbf 2708 mpeg1_decode_sequence(avctx, buf_ptr,
5f0f7713 2709 input_size);
de6d9b64
FB
2710 break;
2711
2712 case PICTURE_START_CODE:
2713 /* we have a complete image : we try to decompress it */
2714 mpeg1_decode_picture(avctx,
5f0f7713 2715 buf_ptr, input_size);
de6d9b64
FB
2716 break;
2717 case EXT_START_CODE:
2718 mpeg_decode_extension(avctx,
80097bbf 2719 buf_ptr, input_size);
e2f9490e
FB
2720 break;
2721 case USER_START_CODE:
2722 mpeg_decode_user_data(avctx,
80097bbf 2723 buf_ptr, input_size);
de6d9b64 2724 break;
05fd1577 2725 case GOP_START_CODE:
8be014e0 2726 s2->first_field=0;
05fd1577 2727 break;
de6d9b64
FB
2728 default:
2729 if (start_code >= SLICE_MIN_START_CODE &&
d9cb5429 2730 start_code <= SLICE_MAX_START_CODE) {
c62c07d3 2731 int mb_y= start_code - SLICE_MIN_START_CODE;
945f15b7
MN
2732
2733 /* skip b frames if we dont have reference frames */
b536d0aa 2734 if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
945f15b7
MN
2735 /* skip b frames if we are in a hurry */
2736 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
2737 /* skip everything if we are in a hurry>=5 */
2738 if(avctx->hurry_up>=5) break;
80097bbf 2739
37b787f1 2740 if (!s->mpeg_enc_ctx_allocated) break;
c62c07d3
MN
2741
2742 if(s2->first_slice){
2743 s2->first_slice=0;
2744 if(mpeg_field_start(s2) < 0)
2745 return -1;
2746 }
2747
2748 if(avctx->thread_count > 1){
2749 int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
2750 if(threshold <= mb_y){
2751 MpegEncContext *thread_context= s2->thread_context[s->slice_count];
2752
2753 thread_context->start_mb_y= mb_y;
2754 thread_context->end_mb_y = s2->mb_height;
2755 if(s->slice_count){
2756 s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
2757 ff_update_duplicate_context(thread_context, s2);
2758 }
2759 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2760 s->slice_count++;
2761 }
2762 buf_ptr += 2; //FIXME add minimum num of bytes per slice
db6e7795 2763 }else{
c62c07d3
MN
2764 ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
2765 emms_c();
2766
2767 if(ret < 0){
2768 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2769 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);
2770 }else{
2771 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);
2772 }
de6d9b64
FB
2773 }
2774 }
2775 break;
2776 }
de6d9b64 2777 }
de6d9b64
FB
2778}
2779
2780static int mpeg_decode_end(AVCodecContext *avctx)
2781{
2782 Mpeg1Context *s = avctx->priv_data;
2783
2784 if (s->mpeg_enc_ctx_allocated)
2785 MPV_common_end(&s->mpeg_enc_ctx);
2786 return 0;
2787}
2788
922bc38d
MN
2789AVCodec mpeg1video_decoder = {
2790 "mpeg1video",
de6d9b64
FB
2791 CODEC_TYPE_VIDEO,
2792 CODEC_ID_MPEG1VIDEO,
2793 sizeof(Mpeg1Context),
2794 mpeg_decode_init,
2795 NULL,
2796 mpeg_decode_end,
2797 mpeg_decode_frame,
d7425f59 2798 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
922bc38d
MN
2799 .flush= ff_mpeg_flush,
2800};
2801
2802AVCodec mpeg2video_decoder = {
2803 "mpeg2video",
2804 CODEC_TYPE_VIDEO,
2805 CODEC_ID_MPEG2VIDEO,
2806 sizeof(Mpeg1Context),
2807 mpeg_decode_init,
2808 NULL,
2809 mpeg_decode_end,
2810 mpeg_decode_frame,
2811 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
c512b303
IK
2812 .flush= ff_mpeg_flush,
2813};
2814
2815//legacy decoder
2816AVCodec mpegvideo_decoder = {
2817 "mpegvideo",
2818 CODEC_TYPE_VIDEO,
2819 CODEC_ID_MPEG2VIDEO,
2820 sizeof(Mpeg1Context),
2821 mpeg_decode_init,
2822 NULL,
2823 mpeg_decode_end,
2824 mpeg_decode_frame,
2825 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
7a06ff14 2826 .flush= ff_mpeg_flush,
de6d9b64 2827};
2e7b4c84 2828
2c492e94
MN
2829#ifdef CONFIG_ENCODERS
2830
2831AVCodec mpeg1video_encoder = {
2832 "mpeg1video",
2833 CODEC_TYPE_VIDEO,
2834 CODEC_ID_MPEG1VIDEO,
2835 sizeof(MpegEncContext),
2836 encode_init,
2837 MPV_encode_picture,
2838 MPV_encode_end,
8d52ec7e 2839 .supported_framerates= frame_rate_tab+1,
2c492e94
MN
2840};
2841
2842#ifdef CONFIG_RISKY
2843
2844AVCodec mpeg2video_encoder = {
2845 "mpeg2video",
2846 CODEC_TYPE_VIDEO,
2847 CODEC_ID_MPEG2VIDEO,
2848 sizeof(MpegEncContext),
2849 encode_init,
2850 MPV_encode_picture,
2851 MPV_encode_end,
8d52ec7e 2852 .supported_framerates= frame_rate_tab+1,
2c492e94
MN
2853};
2854#endif
2855#endif
2856
2e7b4c84
IK
2857#ifdef HAVE_XVMC
2858static int mpeg_mc_decode_init(AVCodecContext *avctx){
2859 Mpeg1Context *s;
2860
2861 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
2862 return -1;
a579db0c 2863 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
2e7b4c84 2864 dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
a579db0c 2865 }
2e7b4c84
IK
2866 mpeg_decode_init(avctx);
2867 s = avctx->priv_data;
2868
2869 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
a579db0c 2870 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
2e7b4c84
IK
2871
2872 return 0;
2873}
2874
2875AVCodec mpeg_xvmc_decoder = {
2876 "mpegvideo_xvmc",
2877 CODEC_TYPE_VIDEO,
2878 CODEC_ID_MPEG2VIDEO_XVMC,
2879 sizeof(Mpeg1Context),
2880 mpeg_mc_decode_init,
2881 NULL,
2882 mpeg_decode_end,
2883 mpeg_decode_frame,
5e5c247a
IK
2884 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL,
2885 .flush= ff_mpeg_flush,
2e7b4c84
IK
2886};
2887
2888#endif
c3bf0288
MN
2889
2890/* this is ugly i know, but the alternative is too make
2891 hundreds of vars global and prefix them with ff_mpeg1_
2892 which is far uglier. */
2893#include "mdec.c"