1/*
2 * ASUS V1/V2 codec
3 * Copyright (c) 2003 Michael Niedermayer
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file libavcodec/asv1.c
24 * ASUS V1/V2 codec.
25 */
26
27#include "avcodec.h"
28#include "bitstream.h"
29#include "dsputil.h"
30#include "mpeg12data.h"
31
32//#undef NDEBUG
33//#include <assert.h>
34
35#define VLC_BITS 6
36#define ASV2_LEVEL_VLC_BITS 10
37
38typedef struct ASV1Context{
39    AVCodecContext *avctx;
40    DSPContext dsp;
41    AVFrame picture;
42    PutBitContext pb;
43    GetBitContext gb;
44    ScanTable scantable;
45    int inv_qscale;
46    int mb_width;
47    int mb_height;
48    int mb_width2;
49    int mb_height2;
50    DECLARE_ALIGNED_16(DCTELEM, block[6][64]);
51    DECLARE_ALIGNED_8(uint16_t, intra_matrix[64]);
52    DECLARE_ALIGNED_8(int, q_intra_matrix[64]);
53    uint8_t *bitstream_buffer;
54    unsigned int bitstream_buffer_size;
55} ASV1Context;
56
57static const uint8_t scantab[64]={
58    0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
59    0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
60    0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
61    0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
62    0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
63    0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,
64    0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,
65    0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,
66};
67
68
69static const uint8_t ccp_tab[17][2]={
70    {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},
71    {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},
72    {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},
73    {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
74    {0xF,5}, //EOB
75};
76
77static const uint8_t level_tab[7][2]={
78    {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
79};
80
81static const uint8_t dc_ccp_tab[8][2]={
82    {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},
83    {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},
84};
85
86static const uint8_t ac_ccp_tab[16][2]={
87    {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},
88    {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},
89    {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},
90    {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
91};
92
93static const uint8_t asv2_level_tab[63][2]={
94    {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
95    {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},
96    {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},
97    {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},
98    {0x07, 4},{0x05, 4},
99    {0x03, 2},
100    {0x00, 5},
101    {0x02, 2},
102    {0x04, 4},{0x06, 4},
103    {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},
104    {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},
105    {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},
106    {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},
107};
108
109
110static VLC ccp_vlc;
111static VLC level_vlc;
112static VLC dc_ccp_vlc;
113static VLC ac_ccp_vlc;
114static VLC asv2_level_vlc;
115
116static av_cold void init_vlcs(ASV1Context *a){
117    static int done = 0;
118
119    if (!done) {
120        done = 1;
121
122        init_vlc(&ccp_vlc, VLC_BITS, 17,
123                 &ccp_tab[0][1], 2, 1,
124                 &ccp_tab[0][0], 2, 1, 1);
125        init_vlc(&dc_ccp_vlc, VLC_BITS, 8,
126                 &dc_ccp_tab[0][1], 2, 1,
127                 &dc_ccp_tab[0][0], 2, 1, 1);
128        init_vlc(&ac_ccp_vlc, VLC_BITS, 16,
129                 &ac_ccp_tab[0][1], 2, 1,
130                 &ac_ccp_tab[0][0], 2, 1, 1);
131        init_vlc(&level_vlc,  VLC_BITS, 7,
132                 &level_tab[0][1], 2, 1,
133                 &level_tab[0][0], 2, 1, 1);
134        init_vlc(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
135                 &asv2_level_tab[0][1], 2, 1,
136                 &asv2_level_tab[0][0], 2, 1, 1);
137    }
138}
139
140//FIXME write a reversed bitstream reader to avoid the double reverse
141static inline int asv2_get_bits(GetBitContext *gb, int n){
142    return ff_reverse[ get_bits(gb, n) << (8-n) ];
143}
144
145static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
146    put_bits(pb, n, ff_reverse[ v << (8-n) ]);
147}
148
149static inline int asv1_get_level(GetBitContext *gb){
150    int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
151
152    if(code==3) return get_sbits(gb, 8);
153    else        return code - 3;
154}
155
156static inline int asv2_get_level(GetBitContext *gb){
157    int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
158
159    if(code==31) return (int8_t)asv2_get_bits(gb, 8);
160    else         return code - 31;
161}
162
163static inline void asv1_put_level(PutBitContext *pb, int level){
164    unsigned int index= level + 3;
165
166    if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
167    else{
168        put_bits(pb, level_tab[3][1], level_tab[3][0]);
169        put_sbits(pb, 8, level);
170    }
171}
172
173static inline void asv2_put_level(PutBitContext *pb, int level){
174    unsigned int index= level + 31;
175
176    if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
177    else{
178        put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
179        asv2_put_bits(pb, 8, level&0xFF);
180    }
181}
182
183static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
184    int i;
185
186    block[0]= 8*get_bits(&a->gb, 8);
187
188    for(i=0; i<11; i++){
189        const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
190
191        if(ccp){
192            if(ccp == 16) break;
193            if(ccp < 0 || i>=10){
194                av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
195                return -1;
196            }
197
198            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
199            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
200            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
201            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
202        }
203    }
204
205    return 0;
206}
207
208static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
209    int i, count, ccp;
210
211    count= asv2_get_bits(&a->gb, 4);
212
213    block[0]= 8*asv2_get_bits(&a->gb, 8);
214
215    ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
216    if(ccp){
217        if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
218        if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
219        if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
220    }
221
222    for(i=1; i<count+1; i++){
223        const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
224
225        if(ccp){
226            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
227            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
228            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
229            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
230        }
231    }
232
233    return 0;
234}
235
236static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
237    int i;
238    int nc_count=0;
239
240    put_bits(&a->pb, 8, (block[0] + 32)>>6);
241    block[0]= 0;
242
243    for(i=0; i<10; i++){
244        const int index= scantab[4*i];
245        int ccp=0;
246
247        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
248        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
249        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
250        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
251
252        if(ccp){
253            for(;nc_count; nc_count--)
254                put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
255
256            put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
257
258            if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
259            if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
260            if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
261            if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
262        }else{
263            nc_count++;
264        }
265    }
266    put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
267}
268
269static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
270    int i;
271    int count=0;
272
273    for(count=63; count>3; count--){
274        const int index= scantab[count];
275
276        if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
277            break;
278    }
279
280    count >>= 2;
281
282    asv2_put_bits(&a->pb, 4, count);
283    asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
284    block[0]= 0;
285
286    for(i=0; i<=count; i++){
287        const int index= scantab[4*i];
288        int ccp=0;
289
290        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
291        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
292        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
293        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
294
295        assert(i || ccp<8);
296        if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
297        else  put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
298
299        if(ccp){
300            if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
301            if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
302            if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
303            if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
304        }
305    }
306}
307
308static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
309    int i;
310
311    a->dsp.clear_blocks(block[0]);
312
313    if(a->avctx->codec_id == CODEC_ID_ASV1){
314        for(i=0; i<6; i++){
315            if( asv1_decode_block(a, block[i]) < 0)
316                return -1;
317        }
318    }else{
319        for(i=0; i<6; i++){
320            if( asv2_decode_block(a, block[i]) < 0)
321                return -1;
322        }
323    }
324    return 0;
325}
326
327static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
328    int i;
329
330    if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){
331        av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
332        return -1;
333    }
334
335    if(a->avctx->codec_id == CODEC_ID_ASV1){
336        for(i=0; i<6; i++)
337            asv1_encode_block(a, block[i]);
338    }else{
339        for(i=0; i<6; i++)
340            asv2_encode_block(a, block[i]);
341    }
342    return 0;
343}
344
345static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
346    DCTELEM (*block)[64]= a->block;
347    int linesize= a->picture.linesize[0];
348
349    uint8_t *dest_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
350    uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
351    uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
352
353    a->dsp.idct_put(dest_y                 , linesize, block[0]);
354    a->dsp.idct_put(dest_y              + 8, linesize, block[1]);
355    a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);
356    a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
357
358    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
359        a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
360        a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
361    }
362}
363
364static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
365    DCTELEM (*block)[64]= a->block;
366    int linesize= a->picture.linesize[0];
367    int i;
368
369    uint8_t *ptr_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
370    uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
371    uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
372
373    a->dsp.get_pixels(block[0], ptr_y                 , linesize);
374    a->dsp.get_pixels(block[1], ptr_y              + 8, linesize);
375    a->dsp.get_pixels(block[2], ptr_y + 8*linesize    , linesize);
376    a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
377    for(i=0; i<4; i++)
378        a->dsp.fdct(block[i]);
379
380    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
381        a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
382        a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
383        for(i=4; i<6; i++)
384            a->dsp.fdct(block[i]);
385    }
386}
387
388static int decode_frame(AVCodecContext *avctx,
389                        void *data, int *data_size,
390                        const uint8_t *buf, int buf_size)
391{
392    ASV1Context * const a = avctx->priv_data;
393    AVFrame *picture = data;
394    AVFrame * const p= (AVFrame*)&a->picture;
395    int mb_x, mb_y;
396
397    if(p->data[0])
398        avctx->release_buffer(avctx, p);
399
400    p->reference= 0;
401    if(avctx->get_buffer(avctx, p) < 0){
402        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
403        return -1;
404    }
405    p->pict_type= FF_I_TYPE;
406    p->key_frame= 1;
407
408    a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
409
410    if(avctx->codec_id == CODEC_ID_ASV1)
411        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
412    else{
413        int i;
414        for(i=0; i<buf_size; i++)
415            a->bitstream_buffer[i]= ff_reverse[ buf[i] ];
416    }
417
418    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
419
420    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
421        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
422            if( decode_mb(a, a->block) <0)
423                return -1;
424
425            idct_put(a, mb_x, mb_y);
426        }
427    }
428
429    if(a->mb_width2 != a->mb_width){
430        mb_x= a->mb_width2;
431        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
432            if( decode_mb(a, a->block) <0)
433                return -1;
434
435            idct_put(a, mb_x, mb_y);
436        }
437    }
438
439    if(a->mb_height2 != a->mb_height){
440        mb_y= a->mb_height2;
441        for(mb_x=0; mb_x<a->mb_width; 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#if 0
449int i;
450printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
451for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
452    printf("%d", get_bits1(&a->gb));
453}
454
455for(i=0; i<s->avctx->extradata_size; i++){
456    printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
457}
458#endif
459
460    *picture= *(AVFrame*)&a->picture;
461    *data_size = sizeof(AVPicture);
462
463    emms_c();
464
465    return (get_bits_count(&a->gb)+31)/32*4;
466}
467
468#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
469static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
470    ASV1Context * const a = avctx->priv_data;
471    AVFrame *pict = data;
472    AVFrame * const p= (AVFrame*)&a->picture;
473    int size;
474    int mb_x, mb_y;
475
476    init_put_bits(&a->pb, buf, buf_size);
477
478    *p = *pict;
479    p->pict_type= FF_I_TYPE;
480    p->key_frame= 1;
481
482    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
483        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
484            dct_get(a, mb_x, mb_y);
485            encode_mb(a, a->block);
486        }
487    }
488
489    if(a->mb_width2 != a->mb_width){
490        mb_x= a->mb_width2;
491        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
492            dct_get(a, mb_x, mb_y);
493            encode_mb(a, a->block);
494        }
495    }
496
497    if(a->mb_height2 != a->mb_height){
498        mb_y= a->mb_height2;
499        for(mb_x=0; mb_x<a->mb_width; mb_x++){
500            dct_get(a, mb_x, mb_y);
501            encode_mb(a, a->block);
502        }
503    }
504    emms_c();
505
506    align_put_bits(&a->pb);
507    while(put_bits_count(&a->pb)&31)
508        put_bits(&a->pb, 8, 0);
509
510    size= put_bits_count(&a->pb)/32;
511
512    if(avctx->codec_id == CODEC_ID_ASV1)
513        a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
514    else{
515        int i;
516        for(i=0; i<4*size; i++)
517            buf[i]= ff_reverse[ buf[i] ];
518    }
519
520    return size*4;
521}
522#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
523
524static av_cold void common_init(AVCodecContext *avctx){
525    ASV1Context * const a = avctx->priv_data;
526
527    dsputil_init(&a->dsp, avctx);
528
529    a->mb_width   = (avctx->width  + 15) / 16;
530    a->mb_height  = (avctx->height + 15) / 16;
531    a->mb_width2  = (avctx->width  + 0) / 16;
532    a->mb_height2 = (avctx->height + 0) / 16;
533
534    avctx->coded_frame= (AVFrame*)&a->picture;
535    a->avctx= avctx;
536}
537
538static av_cold int decode_init(AVCodecContext *avctx){
539    ASV1Context * const a = avctx->priv_data;
540    AVFrame *p= (AVFrame*)&a->picture;
541    int i;
542    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
543
544    common_init(avctx);
545    init_vlcs(a);
546    ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
547    avctx->pix_fmt= PIX_FMT_YUV420P;
548
549    a->inv_qscale= ((uint8_t*)avctx->extradata)[0];
550    if(a->inv_qscale == 0){
551        av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
552        if(avctx->codec_id == CODEC_ID_ASV1)
553            a->inv_qscale= 6;
554        else
555            a->inv_qscale= 10;
556    }
557
558    for(i=0; i<64; i++){
559        int index= scantab[i];
560
561        a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
562    }
563
564    p->qstride= a->mb_width;
565    p->qscale_table= av_malloc( p->qstride * a->mb_height);
566    p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
567    memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
568
569    return 0;
570}
571
572#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
573static av_cold int encode_init(AVCodecContext *avctx){
574    ASV1Context * const a = avctx->priv_data;
575    int i;
576    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
577
578    common_init(avctx);
579
580    if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
581
582    a->inv_qscale= (32*scale*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;
583
584    avctx->extradata= av_mallocz(8);
585    avctx->extradata_size=8;
586    ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
587    ((uint32_t*)avctx->extradata)[1]= le2me_32(AV_RL32("ASUS"));
588
589    for(i=0; i<64; i++){
590        int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
591        a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
592    }
593
594    return 0;
595}
596#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
597
598static av_cold int decode_end(AVCodecContext *avctx){
599    ASV1Context * const a = avctx->priv_data;
600
601    av_freep(&a->bitstream_buffer);
602    av_freep(&a->picture.qscale_table);
603    a->bitstream_buffer_size=0;
604
605    return 0;
606}
607
608AVCodec asv1_decoder = {
609    "asv1",
610    CODEC_TYPE_VIDEO,
611    CODEC_ID_ASV1,
612    sizeof(ASV1Context),
613    decode_init,
614    NULL,
615    decode_end,
616    decode_frame,
617    CODEC_CAP_DR1,
618    .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
619};
620
621AVCodec asv2_decoder = {
622    "asv2",
623    CODEC_TYPE_VIDEO,
624    CODEC_ID_ASV2,
625    sizeof(ASV1Context),
626    decode_init,
627    NULL,
628    decode_end,
629    decode_frame,
630    CODEC_CAP_DR1,
631    .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
632};
633
634#if CONFIG_ASV1_ENCODER
635AVCodec asv1_encoder = {
636    "asv1",
637    CODEC_TYPE_VIDEO,
638    CODEC_ID_ASV1,
639    sizeof(ASV1Context),
640    encode_init,
641    encode_frame,
642    //encode_end,
643    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
644    .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
645};
646#endif
647
648#if CONFIG_ASV2_ENCODER
649AVCodec asv2_encoder = {
650    "asv2",
651    CODEC_TYPE_VIDEO,
652    CODEC_ID_ASV2,
653    sizeof(ASV1Context),
654    encode_init,
655    encode_frame,
656    //encode_end,
657    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
658    .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
659};
660#endif
661