various security fixes and precautionary checks
[libav.git] / libavcodec / asv1.c
1 /*
2 * ASUS V1/V2 codec
3 * Copyright (c) 2003 Michael Niedermayer
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 /**
21 * @file asv1.c
22 * ASUS V1/V2 codec.
23 */
24
25 #include "avcodec.h"
26 #include "dsputil.h"
27 #include "mpegvideo.h"
28
29 //#undef NDEBUG
30 //#include <assert.h>
31
32 #define VLC_BITS 6
33 #define ASV2_LEVEL_VLC_BITS 10
34
35 typedef struct ASV1Context{
36 AVCodecContext *avctx;
37 DSPContext dsp;
38 AVFrame picture;
39 PutBitContext pb;
40 GetBitContext gb;
41 ScanTable scantable;
42 int inv_qscale;
43 int mb_width;
44 int mb_height;
45 int mb_width2;
46 int mb_height2;
47 DCTELEM __align8 block[6][64];
48 uint16_t __align8 intra_matrix[64];
49 int __align8 q_intra_matrix[64];
50 uint8_t *bitstream_buffer;
51 int bitstream_buffer_size;
52 } ASV1Context;
53
54 static const uint8_t scantab[64]={
55 0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
56 0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
57 0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
58 0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
59 0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
60 0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,
61 0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,
62 0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,
63 };
64
65
66 static const uint8_t reverse[256]={
67 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
68 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
69 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
70 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
71 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
72 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
73 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
74 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
75 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
76 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
77 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
78 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
79 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
80 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
81 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
82 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
83 };
84
85 static const uint8_t ccp_tab[17][2]={
86 {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},
87 {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},
88 {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},
89 {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
90 {0xF,5}, //EOB
91 };
92
93 static const uint8_t level_tab[7][2]={
94 {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
95 };
96
97 static const uint8_t dc_ccp_tab[8][2]={
98 {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},
99 {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},
100 };
101
102 static const uint8_t ac_ccp_tab[16][2]={
103 {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},
104 {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},
105 {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},
106 {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
107 };
108
109 static const uint8_t asv2_level_tab[63][2]={
110 {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
111 {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},
112 {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},
113 {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},
114 {0x07, 4},{0x05, 4},
115 {0x03, 2},
116 {0x00, 5},
117 {0x02, 2},
118 {0x04, 4},{0x06, 4},
119 {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},
120 {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},
121 {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},
122 {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},
123 };
124
125
126 static VLC ccp_vlc;
127 static VLC level_vlc;
128 static VLC dc_ccp_vlc;
129 static VLC ac_ccp_vlc;
130 static VLC asv2_level_vlc;
131
132 static void init_vlcs(ASV1Context *a){
133 static int done = 0;
134
135 if (!done) {
136 done = 1;
137
138 init_vlc(&ccp_vlc, VLC_BITS, 17,
139 &ccp_tab[0][1], 2, 1,
140 &ccp_tab[0][0], 2, 1, 1);
141 init_vlc(&dc_ccp_vlc, VLC_BITS, 8,
142 &dc_ccp_tab[0][1], 2, 1,
143 &dc_ccp_tab[0][0], 2, 1, 1);
144 init_vlc(&ac_ccp_vlc, VLC_BITS, 16,
145 &ac_ccp_tab[0][1], 2, 1,
146 &ac_ccp_tab[0][0], 2, 1, 1);
147 init_vlc(&level_vlc, VLC_BITS, 7,
148 &level_tab[0][1], 2, 1,
149 &level_tab[0][0], 2, 1, 1);
150 init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
151 &asv2_level_tab[0][1], 2, 1,
152 &asv2_level_tab[0][0], 2, 1, 1);
153 }
154 }
155
156 //FIXME write a reversed bitstream reader to avoid the double reverse
157 static inline int asv2_get_bits(GetBitContext *gb, int n){
158 return reverse[ get_bits(gb, n) << (8-n) ];
159 }
160
161 static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
162 put_bits(pb, n, reverse[ v << (8-n) ]);
163 }
164
165 static inline int asv1_get_level(GetBitContext *gb){
166 int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
167
168 if(code==3) return get_sbits(gb, 8);
169 else return code - 3;
170 }
171
172 static inline int asv2_get_level(GetBitContext *gb){
173 int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
174
175 if(code==31) return (int8_t)asv2_get_bits(gb, 8);
176 else return code - 31;
177 }
178
179 static inline void asv1_put_level(PutBitContext *pb, int level){
180 unsigned int index= level + 3;
181
182 if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
183 else{
184 put_bits(pb, level_tab[3][1], level_tab[3][0]);
185 put_bits(pb, 8, level&0xFF);
186 }
187 }
188
189 static inline void asv2_put_level(PutBitContext *pb, int level){
190 unsigned int index= level + 31;
191
192 if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
193 else{
194 put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
195 asv2_put_bits(pb, 8, level&0xFF);
196 }
197 }
198
199 static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
200 int i;
201
202 block[0]= 8*get_bits(&a->gb, 8);
203
204 for(i=0; i<11; i++){
205 const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
206
207 if(ccp){
208 if(ccp == 16) break;
209 if(ccp < 0 || i>=10){
210 av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
211 return -1;
212 }
213
214 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
215 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
216 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
217 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
218 }
219 }
220
221 return 0;
222 }
223
224 static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
225 int i, count, ccp;
226
227 count= asv2_get_bits(&a->gb, 4);
228
229 block[0]= 8*asv2_get_bits(&a->gb, 8);
230
231 ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
232 if(ccp){
233 if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
234 if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
235 if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
236 }
237
238 for(i=1; i<count+1; i++){
239 const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
240
241 if(ccp){
242 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
243 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
244 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
245 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
246 }
247 }
248
249 return 0;
250 }
251
252 static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
253 int i;
254 int nc_count=0;
255
256 put_bits(&a->pb, 8, (block[0] + 32)>>6);
257 block[0]= 0;
258
259 for(i=0; i<10; i++){
260 const int index= scantab[4*i];
261 int ccp=0;
262
263 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
264 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
265 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
266 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
267
268 if(ccp){
269 for(;nc_count; nc_count--)
270 put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
271
272 put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
273
274 if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
275 if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
276 if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
277 if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
278 }else{
279 nc_count++;
280 }
281 }
282 put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
283 }
284
285 static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
286 int i;
287 int count=0;
288
289 for(count=63; count>3; count--){
290 const int index= scantab[count];
291
292 if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
293 break;
294 }
295
296 count >>= 2;
297
298 asv2_put_bits(&a->pb, 4, count);
299 asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
300 block[0]= 0;
301
302 for(i=0; i<=count; i++){
303 const int index= scantab[4*i];
304 int ccp=0;
305
306 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
307 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
308 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
309 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
310
311 if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
312 else put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
313
314 if(ccp){
315 if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
316 if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
317 if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
318 if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
319 }
320 }
321 }
322
323 static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
324 int i;
325
326 a->dsp.clear_blocks(block[0]);
327
328 if(a->avctx->codec_id == CODEC_ID_ASV1){
329 for(i=0; i<6; i++){
330 if( asv1_decode_block(a, block[i]) < 0)
331 return -1;
332 }
333 }else{
334 for(i=0; i<6; i++){
335 if( asv2_decode_block(a, block[i]) < 0)
336 return -1;
337 }
338 }
339 return 0;
340 }
341
342 static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
343 int i;
344
345 if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){
346 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
347 return -1;
348 }
349
350 if(a->avctx->codec_id == CODEC_ID_ASV1){
351 for(i=0; i<6; i++)
352 asv1_encode_block(a, block[i]);
353 }else{
354 for(i=0; i<6; i++)
355 asv2_encode_block(a, block[i]);
356 }
357 return 0;
358 }
359
360 static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
361 DCTELEM (*block)[64]= a->block;
362 int linesize= a->picture.linesize[0];
363
364 uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
365 uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
366 uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
367
368 a->dsp.idct_put(dest_y , linesize, block[0]);
369 a->dsp.idct_put(dest_y + 8, linesize, block[1]);
370 a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
371 a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
372
373 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
374 a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
375 a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
376 }
377 }
378
379 static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
380 DCTELEM (*block)[64]= a->block;
381 int linesize= a->picture.linesize[0];
382 int i;
383
384 uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
385 uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
386 uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
387
388 a->dsp.get_pixels(block[0], ptr_y , linesize);
389 a->dsp.get_pixels(block[1], ptr_y + 8, linesize);
390 a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize);
391 a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
392 for(i=0; i<4; i++)
393 a->dsp.fdct(block[i]);
394
395 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
396 a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
397 a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
398 for(i=4; i<6; i++)
399 a->dsp.fdct(block[i]);
400 }
401 }
402
403 static int decode_frame(AVCodecContext *avctx,
404 void *data, int *data_size,
405 uint8_t *buf, int buf_size)
406 {
407 ASV1Context * const a = avctx->priv_data;
408 AVFrame *picture = data;
409 AVFrame * const p= (AVFrame*)&a->picture;
410 int mb_x, mb_y;
411
412 /* special case for last picture */
413 if (buf_size == 0) {
414 return 0;
415 }
416
417 if(p->data[0])
418 avctx->release_buffer(avctx, p);
419
420 p->reference= 0;
421 if(avctx->get_buffer(avctx, p) < 0){
422 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
423 return -1;
424 }
425 p->pict_type= I_TYPE;
426 p->key_frame= 1;
427
428 a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
429
430 if(avctx->codec_id == CODEC_ID_ASV1)
431 a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);
432 else{
433 int i;
434 for(i=0; i<buf_size; i++)
435 a->bitstream_buffer[i]= reverse[ buf[i] ];
436 }
437
438 init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
439
440 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
441 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
442 if( decode_mb(a, a->block) <0)
443 return -1;
444
445 idct_put(a, mb_x, mb_y);
446 }
447 }
448
449 if(a->mb_width2 != a->mb_width){
450 mb_x= a->mb_width2;
451 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
452 if( decode_mb(a, a->block) <0)
453 return -1;
454
455 idct_put(a, mb_x, mb_y);
456 }
457 }
458
459 if(a->mb_height2 != a->mb_height){
460 mb_y= a->mb_height2;
461 for(mb_x=0; mb_x<a->mb_width; mb_x++){
462 if( decode_mb(a, a->block) <0)
463 return -1;
464
465 idct_put(a, mb_x, mb_y);
466 }
467 }
468 #if 0
469 int i;
470 printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
471 for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
472 printf("%d", get_bits1(&a->gb));
473 }
474
475 for(i=0; i<s->avctx->extradata_size; i++){
476 printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
477 }
478 #endif
479
480 *picture= *(AVFrame*)&a->picture;
481 *data_size = sizeof(AVPicture);
482
483 emms_c();
484
485 return (get_bits_count(&a->gb)+31)/32*4;
486 }
487
488 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
489 ASV1Context * const a = avctx->priv_data;
490 AVFrame *pict = data;
491 AVFrame * const p= (AVFrame*)&a->picture;
492 int size;
493 int mb_x, mb_y;
494
495 init_put_bits(&a->pb, buf, buf_size);
496
497 *p = *pict;
498 p->pict_type= I_TYPE;
499 p->key_frame= 1;
500
501 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
502 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
503 dct_get(a, mb_x, mb_y);
504 encode_mb(a, a->block);
505 }
506 }
507
508 if(a->mb_width2 != a->mb_width){
509 mb_x= a->mb_width2;
510 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
511 dct_get(a, mb_x, mb_y);
512 encode_mb(a, a->block);
513 }
514 }
515
516 if(a->mb_height2 != a->mb_height){
517 mb_y= a->mb_height2;
518 for(mb_x=0; mb_x<a->mb_width; mb_x++){
519 dct_get(a, mb_x, mb_y);
520 encode_mb(a, a->block);
521 }
522 }
523 emms_c();
524
525 align_put_bits(&a->pb);
526 while(put_bits_count(&a->pb)&31)
527 put_bits(&a->pb, 8, 0);
528
529 size= put_bits_count(&a->pb)/32;
530
531 if(avctx->codec_id == CODEC_ID_ASV1)
532 a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
533 else{
534 int i;
535 for(i=0; i<4*size; i++)
536 buf[i]= reverse[ buf[i] ];
537 }
538
539 return size*4;
540 }
541
542 static void common_init(AVCodecContext *avctx){
543 ASV1Context * const a = avctx->priv_data;
544
545 dsputil_init(&a->dsp, avctx);
546
547 a->mb_width = (avctx->width + 15) / 16;
548 a->mb_height = (avctx->height + 15) / 16;
549 a->mb_width2 = (avctx->width + 0) / 16;
550 a->mb_height2 = (avctx->height + 0) / 16;
551
552 avctx->coded_frame= (AVFrame*)&a->picture;
553 a->avctx= avctx;
554 }
555
556 static int decode_init(AVCodecContext *avctx){
557 ASV1Context * const a = avctx->priv_data;
558 AVFrame *p= (AVFrame*)&a->picture;
559 int i;
560 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
561
562 common_init(avctx);
563 init_vlcs(a);
564 ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
565
566 a->inv_qscale= ((uint8_t*)avctx->extradata)[0];
567 if(a->inv_qscale == 0){
568 av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
569 if(avctx->codec_id == CODEC_ID_ASV1)
570 a->inv_qscale= 6;
571 else
572 a->inv_qscale= 10;
573 }
574
575 for(i=0; i<64; i++){
576 int index= scantab[i];
577
578 a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
579 }
580
581 p->qstride= a->mb_width;
582 p->qscale_table= av_mallocz( p->qstride * a->mb_height);
583 p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
584 memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
585
586 return 0;
587 }
588
589 static int encode_init(AVCodecContext *avctx){
590 ASV1Context * const a = avctx->priv_data;
591 int i;
592 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
593
594 common_init(avctx);
595
596 if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
597
598 a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality;
599
600 avctx->extradata= av_mallocz(8);
601 avctx->extradata_size=8;
602 ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
603 ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS"));
604
605 for(i=0; i<64; i++){
606 int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
607 a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
608 }
609
610 return 0;
611 }
612
613 static int decode_end(AVCodecContext *avctx){
614 ASV1Context * const a = avctx->priv_data;
615
616 av_freep(&a->bitstream_buffer);
617 av_freep(&a->picture.qscale_table);
618 a->bitstream_buffer_size=0;
619
620 return 0;
621 }
622
623 AVCodec asv1_decoder = {
624 "asv1",
625 CODEC_TYPE_VIDEO,
626 CODEC_ID_ASV1,
627 sizeof(ASV1Context),
628 decode_init,
629 NULL,
630 decode_end,
631 decode_frame,
632 CODEC_CAP_DR1,
633 };
634
635 AVCodec asv2_decoder = {
636 "asv2",
637 CODEC_TYPE_VIDEO,
638 CODEC_ID_ASV2,
639 sizeof(ASV1Context),
640 decode_init,
641 NULL,
642 decode_end,
643 decode_frame,
644 CODEC_CAP_DR1,
645 };
646
647 #ifdef CONFIG_ENCODERS
648
649 AVCodec asv1_encoder = {
650 "asv1",
651 CODEC_TYPE_VIDEO,
652 CODEC_ID_ASV1,
653 sizeof(ASV1Context),
654 encode_init,
655 encode_frame,
656 //encode_end,
657 };
658
659 AVCodec asv2_encoder = {
660 "asv2",
661 CODEC_TYPE_VIDEO,
662 CODEC_ID_ASV2,
663 sizeof(ASV1Context),
664 encode_init,
665 encode_frame,
666 //encode_end,
667 };
668
669 #endif //CONFIG_ENCODERS