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
24 * ASUS V1/V2 codec.
25 */
26
27#include "avcodec.h"
28#include "libavutil/common.h"
29#include "put_bits.h"
30#include "dsputil.h"
31#include "mpeg12data.h"
32
33//#undef NDEBUG
34//#include <assert.h>
35
36#define VLC_BITS 6
37#define ASV2_LEVEL_VLC_BITS 10
38
39typedef struct ASV1Context{
40    AVCodecContext *avctx;
41    DSPContext dsp;
42    AVFrame picture;
43    PutBitContext pb;
44    GetBitContext gb;
45    ScanTable scantable;
46    int inv_qscale;
47    int mb_width;
48    int mb_height;
49    int mb_width2;
50    int mb_height2;
51    DECLARE_ALIGNED(16, DCTELEM, block)[6][64];
52    uint16_t intra_matrix[64];
53    int q_intra_matrix[64];
54    uint8_t *bitstream_buffer;
55    unsigned int bitstream_buffer_size;
56} ASV1Context;
57
58static const uint8_t scantab[64]={
59    0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
60    0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
61    0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
62    0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
63    0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
64    0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,
65    0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,
66    0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,
67};
68
69
70static const uint8_t ccp_tab[17][2]={
71    {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},
72    {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},
73    {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},
74    {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
75    {0xF,5}, //EOB
76};
77
78static const uint8_t level_tab[7][2]={
79    {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
80};
81
82static const uint8_t dc_ccp_tab[8][2]={
83    {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},
84    {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},
85};
86
87static const uint8_t ac_ccp_tab[16][2]={
88    {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},
89    {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},
90    {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},
91    {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
92};
93
94static const uint8_t asv2_level_tab[63][2]={
95    {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
96    {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},
97    {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},
98    {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},
99    {0x07, 4},{0x05, 4},
100    {0x03, 2},
101    {0x00, 5},
102    {0x02, 2},
103    {0x04, 4},{0x06, 4},
104    {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},
105    {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},
106    {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},
107    {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},
108};
109
110
111static VLC ccp_vlc;
112static VLC level_vlc;
113static VLC dc_ccp_vlc;
114static VLC ac_ccp_vlc;
115static VLC asv2_level_vlc;
116
117static av_cold void init_vlcs(ASV1Context *a){
118    static int done = 0;
119
120    if (!done) {
121        done = 1;
122
123        INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
124                 &ccp_tab[0][1], 2, 1,
125                 &ccp_tab[0][0], 2, 1, 64);
126        INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
127                 &dc_ccp_tab[0][1], 2, 1,
128                 &dc_ccp_tab[0][0], 2, 1, 64);
129        INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
130                 &ac_ccp_tab[0][1], 2, 1,
131                 &ac_ccp_tab[0][0], 2, 1, 64);
132        INIT_VLC_STATIC(&level_vlc,  VLC_BITS, 7,
133                 &level_tab[0][1], 2, 1,
134                 &level_tab[0][0], 2, 1, 64);
135        INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
136                 &asv2_level_tab[0][1], 2, 1,
137                 &asv2_level_tab[0][0], 2, 1, 1024);
138    }
139}
140
141//FIXME write a reversed bitstream reader to avoid the double reverse
142static inline int asv2_get_bits(GetBitContext *gb, int n){
143    return av_reverse[ get_bits(gb, n) << (8-n) ];
144}
145
146static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
147    put_bits(pb, n, av_reverse[ v << (8-n) ]);
148}
149
150static inline int asv1_get_level(GetBitContext *gb){
151    int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
152
153    if(code==3) return get_sbits(gb, 8);
154    else        return code - 3;
155}
156
157static inline int asv2_get_level(GetBitContext *gb){
158    int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
159
160    if(code==31) return (int8_t)asv2_get_bits(gb, 8);
161    else         return code - 31;
162}
163
164static inline void asv1_put_level(PutBitContext *pb, int level){
165    unsigned int index= level + 3;
166
167    if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
168    else{
169        put_bits(pb, level_tab[3][1], level_tab[3][0]);
170        put_sbits(pb, 8, level);
171    }
172}
173
174static inline void asv2_put_level(PutBitContext *pb, int level){
175    unsigned int index= level + 31;
176
177    if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
178    else{
179        put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
180        asv2_put_bits(pb, 8, level&0xFF);
181    }
182}
183
184static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
185    int i;
186
187    block[0]= 8*get_bits(&a->gb, 8);
188
189    for(i=0; i<11; i++){
190        const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
191
192        if(ccp){
193            if(ccp == 16) break;
194            if(ccp < 0 || i>=10){
195                av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
196                return -1;
197            }
198
199            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
200            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
201            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
202            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
203        }
204    }
205
206    return 0;
207}
208
209static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
210    int i, count, ccp;
211
212    count= asv2_get_bits(&a->gb, 4);
213
214    block[0]= 8*asv2_get_bits(&a->gb, 8);
215
216    ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
217    if(ccp){
218        if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
219        if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
220        if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
221    }
222
223    for(i=1; i<count+1; i++){
224        const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
225
226        if(ccp){
227            if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
228            if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
229            if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
230            if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
231        }
232    }
233
234    return 0;
235}
236
237static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
238    int i;
239    int nc_count=0;
240
241    put_bits(&a->pb, 8, (block[0] + 32)>>6);
242    block[0]= 0;
243
244    for(i=0; i<10; i++){
245        const int index= scantab[4*i];
246        int ccp=0;
247
248        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
249        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
250        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
251        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
252
253        if(ccp){
254            for(;nc_count; nc_count--)
255                put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
256
257            put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
258
259            if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
260            if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
261            if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
262            if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
263        }else{
264            nc_count++;
265        }
266    }
267    put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
268}
269
270static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
271    int i;
272    int count=0;
273
274    for(count=63; count>3; count--){
275        const int index= scantab[count];
276
277        if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
278            break;
279    }
280
281    count >>= 2;
282
283    asv2_put_bits(&a->pb, 4, count);
284    asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
285    block[0]= 0;
286
287    for(i=0; i<=count; i++){
288        const int index= scantab[4*i];
289        int ccp=0;
290
291        if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
292        if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
293        if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
294        if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
295
296        assert(i || ccp<8);
297        if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
298        else  put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
299
300        if(ccp){
301            if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
302            if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
303            if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
304            if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
305        }
306    }
307}
308
309static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
310    int i;
311
312    a->dsp.clear_blocks(block[0]);
313
314    if(a->avctx->codec_id == CODEC_ID_ASV1){
315        for(i=0; i<6; i++){
316            if( asv1_decode_block(a, block[i]) < 0)
317                return -1;
318        }
319    }else{
320        for(i=0; i<6; i++){
321            if( asv2_decode_block(a, block[i]) < 0)
322                return -1;
323        }
324    }
325    return 0;
326}
327
328static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
329    int i;
330
331    if(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < 30*16*16*3/2/8){
332        av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
333        return -1;
334    }
335
336    if(a->avctx->codec_id == CODEC_ID_ASV1){
337        for(i=0; i<6; i++)
338            asv1_encode_block(a, block[i]);
339    }else{
340        for(i=0; i<6; i++)
341            asv2_encode_block(a, block[i]);
342    }
343    return 0;
344}
345
346static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
347    DCTELEM (*block)[64]= a->block;
348    int linesize= a->picture.linesize[0];
349
350    uint8_t *dest_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
351    uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
352    uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
353
354    a->dsp.idct_put(dest_y                 , linesize, block[0]);
355    a->dsp.idct_put(dest_y              + 8, linesize, block[1]);
356    a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);
357    a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
358
359    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
360        a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
361        a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
362    }
363}
364
365static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
366    DCTELEM (*block)[64]= a->block;
367    int linesize= a->picture.linesize[0];
368    int i;
369
370    uint8_t *ptr_y  = a->picture.data[0] + (mb_y * 16* linesize              ) + mb_x * 16;
371    uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
372    uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
373
374    a->dsp.get_pixels(block[0], ptr_y                 , linesize);
375    a->dsp.get_pixels(block[1], ptr_y              + 8, linesize);
376    a->dsp.get_pixels(block[2], ptr_y + 8*linesize    , linesize);
377    a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
378    for(i=0; i<4; i++)
379        a->dsp.fdct(block[i]);
380
381    if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
382        a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
383        a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
384        for(i=4; i<6; i++)
385            a->dsp.fdct(block[i]);
386    }
387}
388
389static int decode_frame(AVCodecContext *avctx,
390                        void *data, int *data_size,
391                        AVPacket *avpkt)
392{
393    const uint8_t *buf = avpkt->data;
394    int buf_size = avpkt->size;
395    ASV1Context * const a = avctx->priv_data;
396    AVFrame *picture = data;
397    AVFrame * const p= &a->picture;
398    int mb_x, mb_y;
399
400    if(p->data[0])
401        avctx->release_buffer(avctx, p);
402
403    p->reference= 0;
404    if(avctx->get_buffer(avctx, p) < 0){
405        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
406        return -1;
407    }
408    p->pict_type= FF_I_TYPE;
409    p->key_frame= 1;
410
411    av_fast_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
412    if (!a->bitstream_buffer)
413        return AVERROR(ENOMEM);
414
415    if(avctx->codec_id == CODEC_ID_ASV1)
416        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
417    else{
418        int i;
419        for(i=0; i<buf_size; i++)
420            a->bitstream_buffer[i]= av_reverse[ buf[i] ];
421    }
422
423    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
424
425    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
426        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
427            if( decode_mb(a, a->block) <0)
428                return -1;
429
430            idct_put(a, mb_x, mb_y);
431        }
432    }
433
434    if(a->mb_width2 != a->mb_width){
435        mb_x= a->mb_width2;
436        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
437            if( decode_mb(a, a->block) <0)
438                return -1;
439
440            idct_put(a, mb_x, mb_y);
441        }
442    }
443
444    if(a->mb_height2 != a->mb_height){
445        mb_y= a->mb_height2;
446        for(mb_x=0; mb_x<a->mb_width; mb_x++){
447            if( decode_mb(a, a->block) <0)
448                return -1;
449
450            idct_put(a, mb_x, mb_y);
451        }
452    }
453#if 0
454int i;
455printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
456for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
457    printf("%d", get_bits1(&a->gb));
458}
459
460for(i=0; i<s->avctx->extradata_size; i++){
461    printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
462}
463#endif
464
465    *picture= *(AVFrame*)&a->picture;
466    *data_size = sizeof(AVPicture);
467
468    emms_c();
469
470    return (get_bits_count(&a->gb)+31)/32*4;
471}
472
473#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
474static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
475    ASV1Context * const a = avctx->priv_data;
476    AVFrame *pict = data;
477    AVFrame * const p= &a->picture;
478    int size;
479    int mb_x, mb_y;
480
481    init_put_bits(&a->pb, buf, buf_size);
482
483    *p = *pict;
484    p->pict_type= FF_I_TYPE;
485    p->key_frame= 1;
486
487    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
488        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
489            dct_get(a, mb_x, mb_y);
490            encode_mb(a, a->block);
491        }
492    }
493
494    if(a->mb_width2 != a->mb_width){
495        mb_x= a->mb_width2;
496        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
497            dct_get(a, mb_x, mb_y);
498            encode_mb(a, a->block);
499        }
500    }
501
502    if(a->mb_height2 != a->mb_height){
503        mb_y= a->mb_height2;
504        for(mb_x=0; mb_x<a->mb_width; mb_x++){
505            dct_get(a, mb_x, mb_y);
506            encode_mb(a, a->block);
507        }
508    }
509    emms_c();
510
511    align_put_bits(&a->pb);
512    while(put_bits_count(&a->pb)&31)
513        put_bits(&a->pb, 8, 0);
514
515    size= put_bits_count(&a->pb)/32;
516
517    if(avctx->codec_id == CODEC_ID_ASV1)
518        a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
519    else{
520        int i;
521        for(i=0; i<4*size; i++)
522            buf[i]= av_reverse[ buf[i] ];
523    }
524
525    return size*4;
526}
527#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
528
529static av_cold void common_init(AVCodecContext *avctx){
530    ASV1Context * const a = avctx->priv_data;
531
532    dsputil_init(&a->dsp, avctx);
533
534    a->mb_width   = (avctx->width  + 15) / 16;
535    a->mb_height  = (avctx->height + 15) / 16;
536    a->mb_width2  = (avctx->width  + 0) / 16;
537    a->mb_height2 = (avctx->height + 0) / 16;
538
539    avctx->coded_frame= &a->picture;
540    a->avctx= avctx;
541}
542
543static av_cold int decode_init(AVCodecContext *avctx){
544    ASV1Context * const a = avctx->priv_data;
545    AVFrame *p= &a->picture;
546    int i;
547    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
548
549    common_init(avctx);
550    init_vlcs(a);
551    ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
552    avctx->pix_fmt= PIX_FMT_YUV420P;
553
554    a->inv_qscale= avctx->extradata[0];
555    if(a->inv_qscale == 0){
556        av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
557        if(avctx->codec_id == CODEC_ID_ASV1)
558            a->inv_qscale= 6;
559        else
560            a->inv_qscale= 10;
561    }
562
563    for(i=0; i<64; i++){
564        int index= scantab[i];
565
566        a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
567    }
568
569    p->qstride= a->mb_width;
570    p->qscale_table= av_malloc( p->qstride * a->mb_height);
571    p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
572    memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
573
574    return 0;
575}
576
577#if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
578static av_cold int encode_init(AVCodecContext *avctx){
579    ASV1Context * const a = avctx->priv_data;
580    int i;
581    const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
582
583    common_init(avctx);
584
585    if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
586
587    a->inv_qscale= (32*scale*FF_QUALITY_SCALE +  avctx->global_quality/2) / avctx->global_quality;
588
589    avctx->extradata= av_mallocz(8);
590    avctx->extradata_size=8;
591    ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
592    ((uint32_t*)avctx->extradata)[1]= le2me_32(AV_RL32("ASUS"));
593
594    for(i=0; i<64; i++){
595        int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
596        a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
597    }
598
599    return 0;
600}
601#endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
602
603static av_cold int decode_end(AVCodecContext *avctx){
604    ASV1Context * const a = avctx->priv_data;
605
606    av_freep(&a->bitstream_buffer);
607    av_freep(&a->picture.qscale_table);
608    a->bitstream_buffer_size=0;
609
610    if(a->picture.data[0])
611        avctx->release_buffer(avctx, &a->picture);
612
613    return 0;
614}
615
616AVCodec asv1_decoder = {
617    "asv1",
618    AVMEDIA_TYPE_VIDEO,
619    CODEC_ID_ASV1,
620    sizeof(ASV1Context),
621    decode_init,
622    NULL,
623    decode_end,
624    decode_frame,
625    CODEC_CAP_DR1,
626    .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
627};
628
629AVCodec asv2_decoder = {
630    "asv2",
631    AVMEDIA_TYPE_VIDEO,
632    CODEC_ID_ASV2,
633    sizeof(ASV1Context),
634    decode_init,
635    NULL,
636    decode_end,
637    decode_frame,
638    CODEC_CAP_DR1,
639    .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
640};
641
642#if CONFIG_ASV1_ENCODER
643AVCodec asv1_encoder = {
644    "asv1",
645    AVMEDIA_TYPE_VIDEO,
646    CODEC_ID_ASV1,
647    sizeof(ASV1Context),
648    encode_init,
649    encode_frame,
650    //encode_end,
651    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
652    .long_name= NULL_IF_CONFIG_SMALL("ASUS V1"),
653};
654#endif
655
656#if CONFIG_ASV2_ENCODER
657AVCodec asv2_encoder = {
658    "asv2",
659    AVMEDIA_TYPE_VIDEO,
660    CODEC_ID_ASV2,
661    sizeof(ASV1Context),
662    encode_init,
663    encode_frame,
664    //encode_end,
665    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
666    .long_name= NULL_IF_CONFIG_SMALL("ASUS V2"),
667};
668#endif
669