3 * Copyright (c) 2003 Michael Niedermayer
5 * This file is part of FFmpeg.
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.
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.
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
29 #include "libavutil/common.h"
32 #include "mpeg12data.h"
35 #define ASV2_LEVEL_VLC_BITS 10
37 typedef struct ASV1Context{
38 AVCodecContext *avctx;
49 DECLARE_ALIGNED(16, DCTELEM, block)[6][64];
50 uint16_t intra_matrix[64];
51 int q_intra_matrix[64];
52 uint8_t *bitstream_buffer;
53 unsigned int bitstream_buffer_size;
56 static const uint8_t scantab[64]={
57 0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
58 0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
59 0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
60 0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
61 0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
62 0x16,0x1E,0x17,0x1F,0x24,0x2C,0x25,0x2D,
63 0x32,0x3A,0x33,0x3B,0x26,0x2E,0x27,0x2F,
64 0x34,0x3C,0x35,0x3D,0x36,0x3E,0x37,0x3F,
68 static const uint8_t ccp_tab[17][2]={
69 {0x2,2}, {0x7,5}, {0xB,5}, {0x3,5},
70 {0xD,5}, {0x5,5}, {0x9,5}, {0x1,5},
71 {0xE,5}, {0x6,5}, {0xA,5}, {0x2,5},
72 {0xC,5}, {0x4,5}, {0x8,5}, {0x3,2},
76 static const uint8_t level_tab[7][2]={
77 {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
80 static const uint8_t dc_ccp_tab[8][2]={
81 {0x1,2}, {0xD,4}, {0xF,4}, {0xC,4},
82 {0x5,3}, {0xE,4}, {0x4,3}, {0x0,2},
85 static const uint8_t ac_ccp_tab[16][2]={
86 {0x00,2}, {0x3B,6}, {0x0A,4}, {0x3A,6},
87 {0x02,3}, {0x39,6}, {0x3C,6}, {0x38,6},
88 {0x03,3}, {0x3D,6}, {0x08,4}, {0x1F,5},
89 {0x09,4}, {0x0B,4}, {0x0D,4}, {0x0C,4},
92 static const uint8_t asv2_level_tab[63][2]={
93 {0x3F,10},{0x2F,10},{0x37,10},{0x27,10},{0x3B,10},{0x2B,10},{0x33,10},{0x23,10},
94 {0x3D,10},{0x2D,10},{0x35,10},{0x25,10},{0x39,10},{0x29,10},{0x31,10},{0x21,10},
95 {0x1F, 8},{0x17, 8},{0x1B, 8},{0x13, 8},{0x1D, 8},{0x15, 8},{0x19, 8},{0x11, 8},
96 {0x0F, 6},{0x0B, 6},{0x0D, 6},{0x09, 6},
102 {0x08, 6},{0x0C, 6},{0x0A, 6},{0x0E, 6},
103 {0x10, 8},{0x18, 8},{0x14, 8},{0x1C, 8},{0x12, 8},{0x1A, 8},{0x16, 8},{0x1E, 8},
104 {0x20,10},{0x30,10},{0x28,10},{0x38,10},{0x24,10},{0x34,10},{0x2C,10},{0x3C,10},
105 {0x22,10},{0x32,10},{0x2A,10},{0x3A,10},{0x26,10},{0x36,10},{0x2E,10},{0x3E,10},
110 static VLC level_vlc;
111 static VLC dc_ccp_vlc;
112 static VLC ac_ccp_vlc;
113 static VLC asv2_level_vlc;
115 static av_cold void init_vlcs(ASV1Context *a){
121 INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
122 &ccp_tab[0][1], 2, 1,
123 &ccp_tab[0][0], 2, 1, 64);
124 INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
125 &dc_ccp_tab[0][1], 2, 1,
126 &dc_ccp_tab[0][0], 2, 1, 64);
127 INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
128 &ac_ccp_tab[0][1], 2, 1,
129 &ac_ccp_tab[0][0], 2, 1, 64);
130 INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7,
131 &level_tab[0][1], 2, 1,
132 &level_tab[0][0], 2, 1, 64);
133 INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
134 &asv2_level_tab[0][1], 2, 1,
135 &asv2_level_tab[0][0], 2, 1, 1024);
139 //FIXME write a reversed bitstream reader to avoid the double reverse
140 static inline int asv2_get_bits(GetBitContext *gb, int n){
141 return av_reverse[ get_bits(gb, n) << (8-n) ];
144 static inline void asv2_put_bits(PutBitContext *pb, int n, int v){
145 put_bits(pb, n, av_reverse[ v << (8-n) ]);
148 static inline int asv1_get_level(GetBitContext *gb){
149 int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
151 if(code==3) return get_sbits(gb, 8);
152 else return code - 3;
155 static inline int asv2_get_level(GetBitContext *gb){
156 int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
158 if(code==31) return (int8_t)asv2_get_bits(gb, 8);
159 else return code - 31;
162 static inline void asv1_put_level(PutBitContext *pb, int level){
163 unsigned int index= level + 3;
165 if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
167 put_bits(pb, level_tab[3][1], level_tab[3][0]);
168 put_sbits(pb, 8, level);
172 static inline void asv2_put_level(PutBitContext *pb, int level){
173 unsigned int index= level + 31;
175 if(index <= 62) put_bits(pb, asv2_level_tab[index][1], asv2_level_tab[index][0]);
177 put_bits(pb, asv2_level_tab[31][1], asv2_level_tab[31][0]);
178 asv2_put_bits(pb, 8, level&0xFF);
182 static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){
185 block[0]= 8*get_bits(&a->gb, 8);
188 const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
192 if(ccp < 0 || i>=10){
193 av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
197 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
198 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
199 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
200 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
207 static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){
210 count= asv2_get_bits(&a->gb, 4);
212 block[0]= 8*asv2_get_bits(&a->gb, 8);
214 ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
216 if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4;
217 if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4;
218 if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4;
221 for(i=1; i<count+1; i++){
222 const int ccp= get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
225 if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
226 if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;
227 if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;
228 if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;
235 static inline void asv1_encode_block(ASV1Context *a, DCTELEM block[64]){
239 put_bits(&a->pb, 8, (block[0] + 32)>>6);
243 const int index= scantab[4*i];
246 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
247 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
248 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
249 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
252 for(;nc_count; nc_count--)
253 put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
255 put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
257 if(ccp&8) asv1_put_level(&a->pb, block[index + 0]);
258 if(ccp&4) asv1_put_level(&a->pb, block[index + 8]);
259 if(ccp&2) asv1_put_level(&a->pb, block[index + 1]);
260 if(ccp&1) asv1_put_level(&a->pb, block[index + 9]);
265 put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
268 static inline void asv2_encode_block(ASV1Context *a, DCTELEM block[64]){
272 for(count=63; count>3; count--){
273 const int index= scantab[count];
275 if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 )
281 asv2_put_bits(&a->pb, 4, count);
282 asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6);
285 for(i=0; i<=count; i++){
286 const int index= scantab[4*i];
289 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8;
290 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4;
291 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2;
292 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1;
294 av_assert2(i || ccp<8);
295 if(i) put_bits(&a->pb, ac_ccp_tab[ccp][1], ac_ccp_tab[ccp][0]);
296 else put_bits(&a->pb, dc_ccp_tab[ccp][1], dc_ccp_tab[ccp][0]);
299 if(ccp&8) asv2_put_level(&a->pb, block[index + 0]);
300 if(ccp&4) asv2_put_level(&a->pb, block[index + 8]);
301 if(ccp&2) asv2_put_level(&a->pb, block[index + 1]);
302 if(ccp&1) asv2_put_level(&a->pb, block[index + 9]);
307 static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
310 a->dsp.clear_blocks(block[0]);
312 if(a->avctx->codec_id == CODEC_ID_ASV1){
314 if( asv1_decode_block(a, block[i]) < 0)
319 if( asv2_decode_block(a, block[i]) < 0)
326 #define MAX_MB_SIZE (30*16*16*3/2/8)
328 static inline int encode_mb(ASV1Context *a, DCTELEM block[6][64]){
331 if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) {
332 av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n");
336 if(a->avctx->codec_id == CODEC_ID_ASV1){
338 asv1_encode_block(a, block[i]);
341 asv2_encode_block(a, block[i]);
346 static 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];
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;
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]);
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]);
365 static 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];
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;
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);
379 a->dsp.fdct(block[i]);
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]);
385 a->dsp.fdct(block[i]);
389 static int decode_frame(AVCodecContext *avctx,
390 void *data, int *data_size,
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;
401 avctx->release_buffer(avctx, p);
404 if(avctx->get_buffer(avctx, p) < 0){
405 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
408 p->pict_type= AV_PICTURE_TYPE_I;
411 av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
413 if (!a->bitstream_buffer)
414 return AVERROR(ENOMEM);
416 if(avctx->codec_id == CODEC_ID_ASV1)
417 a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
420 for(i=0; i<buf_size; i++)
421 a->bitstream_buffer[i]= av_reverse[ buf[i] ];
424 init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
426 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
427 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
428 if( decode_mb(a, a->block) <0)
431 idct_put(a, mb_x, mb_y);
435 if(a->mb_width2 != a->mb_width){
437 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
438 if( decode_mb(a, a->block) <0)
441 idct_put(a, mb_x, mb_y);
445 if(a->mb_height2 != a->mb_height){
447 for(mb_x=0; mb_x<a->mb_width; mb_x++){
448 if( decode_mb(a, a->block) <0)
451 idct_put(a, mb_x, mb_y);
455 *picture = a->picture;
456 *data_size = sizeof(AVPicture);
460 return (get_bits_count(&a->gb)+31)/32*4;
463 #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
464 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
465 const AVFrame *pict, int *got_packet)
467 ASV1Context * const a = avctx->priv_data;
468 AVFrame * const p= &a->picture;
472 if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height*a->mb_width*MAX_MB_SIZE +
473 FF_MIN_BUFFER_SIZE)) < 0)
476 init_put_bits(&a->pb, pkt->data, pkt->size);
479 p->pict_type= AV_PICTURE_TYPE_I;
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);
489 if(a->mb_width2 != a->mb_width){
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);
497 if(a->mb_height2 != a->mb_height){
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);
506 avpriv_align_put_bits(&a->pb);
507 while(put_bits_count(&a->pb)&31)
508 put_bits(&a->pb, 8, 0);
510 size= put_bits_count(&a->pb)/32;
512 if(avctx->codec_id == CODEC_ID_ASV1)
513 a->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
516 for(i=0; i<4*size; i++)
517 pkt->data[i] = av_reverse[pkt->data[i]];
521 pkt->flags |= AV_PKT_FLAG_KEY;
526 #endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
528 static av_cold void common_init(AVCodecContext *avctx){
529 ASV1Context * const a = avctx->priv_data;
531 ff_dsputil_init(&a->dsp, avctx);
533 a->mb_width = (avctx->width + 15) / 16;
534 a->mb_height = (avctx->height + 15) / 16;
535 a->mb_width2 = (avctx->width + 0) / 16;
536 a->mb_height2 = (avctx->height + 0) / 16;
538 avctx->coded_frame= &a->picture;
542 static av_cold int decode_init(AVCodecContext *avctx){
543 ASV1Context * const a = avctx->priv_data;
544 AVFrame *p= &a->picture;
546 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
550 ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
551 avctx->pix_fmt= PIX_FMT_YUV420P;
553 if(avctx->extradata_size < 1 || (a->inv_qscale= avctx->extradata[0]) == 0){
554 av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
555 if(avctx->codec_id == CODEC_ID_ASV1)
562 int index= scantab[i];
564 a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
567 p->qstride= a->mb_width;
568 p->qscale_table= av_malloc( p->qstride * a->mb_height);
569 p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale;
570 memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
575 #if CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER
576 static av_cold int encode_init(AVCodecContext *avctx){
577 ASV1Context * const a = avctx->priv_data;
579 const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
583 if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
585 a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality;
587 avctx->extradata= av_mallocz(8);
588 avctx->extradata_size=8;
589 ((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale);
590 ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS"));
593 int q= 32*scale*ff_mpeg1_default_intra_matrix[i];
594 a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
599 #endif /* CONFIG_ASV1_ENCODER || CONFIG_ASV2_ENCODER */
601 static av_cold int decode_end(AVCodecContext *avctx){
602 ASV1Context * const a = avctx->priv_data;
604 av_freep(&a->bitstream_buffer);
605 av_freep(&a->picture.qscale_table);
606 a->bitstream_buffer_size=0;
608 if(a->picture.data[0])
609 avctx->release_buffer(avctx, &a->picture);
614 #if CONFIG_ASV1_DECODER
615 AVCodec ff_asv1_decoder = {
617 .type = AVMEDIA_TYPE_VIDEO,
619 .priv_data_size = sizeof(ASV1Context),
622 .decode = decode_frame,
623 .capabilities = CODEC_CAP_DR1,
624 .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
628 #if CONFIG_ASV2_DECODER
629 AVCodec ff_asv2_decoder = {
631 .type = AVMEDIA_TYPE_VIDEO,
633 .priv_data_size = sizeof(ASV1Context),
636 .decode = decode_frame,
637 .capabilities = CODEC_CAP_DR1,
638 .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
642 #if CONFIG_ASV1_ENCODER
643 AVCodec ff_asv1_encoder = {
645 .type = AVMEDIA_TYPE_VIDEO,
647 .priv_data_size = sizeof(ASV1Context),
649 .encode2 = encode_frame,
650 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
651 .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
655 #if CONFIG_ASV2_ENCODER
656 AVCodec ff_asv2_encoder = {
658 .type = AVMEDIA_TYPE_VIDEO,
660 .priv_data_size = sizeof(ASV1Context),
662 .encode2 = encode_frame,
663 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
664 .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),