3 * Copyright (c) 2003 Michael Niedermayer
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.
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.
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
27 #include "mpegvideo.h"
34 typedef struct ASV1Context{
35 AVCodecContext *avctx;
46 DCTELEM __align8 block[6][64];
47 uint16_t __align8 intra_matrix[64];
48 int __align8 q_intra_matrix[64];
49 uint8_t *bitstream_buffer;
50 int bitstream_buffer_size;
53 static const uint8_t scantab[64]={
54 0x00,0x08,0x01,0x09,0x10,0x18,0x11,0x19,
55 0x02,0x0A,0x03,0x0B,0x12,0x1A,0x13,0x1B,
56 0x04,0x0C,0x05,0x0D,0x20,0x28,0x21,0x29,
57 0x06,0x0E,0x07,0x0F,0x14,0x1C,0x15,0x1D,
58 0x22,0x2A,0x23,0x2B,0x30,0x38,0x31,0x39,
61 static const uint8_t ccp_tab[17][2]={
62 {0x2,2}, {0xE,5}, {0xD,5}, {0xC,5},
63 {0xB,5}, {0xA,5}, {0x9,5}, {0x8,5},
64 {0x7,5}, {0x6,5}, {0x5,5}, {0x4,5},
65 {0x3,5}, {0x2,5}, {0x1,5}, {0x3,2},
69 static const uint8_t level_tab[7][2]={
70 {3,4}, {3,3}, {3,2}, {0,3}, {2,2}, {2,3}, {2,4}
76 static void init_vlcs(ASV1Context *a){
82 init_vlc(&ccp_vlc, VLC_BITS, 17,
84 &ccp_tab[0][0], 2, 1);
85 init_vlc(&level_vlc, VLC_BITS, 7,
86 &level_tab[0][1], 2, 1,
87 &level_tab[0][0], 2, 1);
91 static inline int get_level(GetBitContext *gb){
92 int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
94 if(code==3) return get_sbits(gb, 8);
98 #ifdef CONFIG_ENCODERS
100 static inline void put_level(PutBitContext *pb, int level){
101 unsigned int index= level + 3;
103 if(index <= 6) put_bits(pb, level_tab[index][1], level_tab[index][0]);
105 put_bits(pb, level_tab[3][1], level_tab[3][0]);
106 put_bits(pb, 8, level&0xFF);
110 #endif //CONFIG_ENCODERS
112 static inline int decode_block(ASV1Context *a, DCTELEM block[64]){
115 block[0]= 8*get_bits(&a->gb, 8);
118 const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
122 if(ccp < 0 || i>=10){
123 printf("coded coeff pattern damaged\n");
127 if(ccp&1) block[a->scantable.permutated[4*i+0]]= (get_level(&a->gb) * a->intra_matrix[4*i+0])>>4;
128 if(ccp&2) block[a->scantable.permutated[4*i+1]]= (get_level(&a->gb) * a->intra_matrix[4*i+1])>>4;;
129 if(ccp&4) block[a->scantable.permutated[4*i+2]]= (get_level(&a->gb) * a->intra_matrix[4*i+2])>>4;;
130 if(ccp&8) block[a->scantable.permutated[4*i+3]]= (get_level(&a->gb) * a->intra_matrix[4*i+3])>>4;;
137 #ifdef CONFIG_ENCODERS
139 static inline void encode_block(ASV1Context *a, DCTELEM block[64]){
143 put_bits(&a->pb, 8, (block[0] + 32)>>6);
147 const int index= scantab[4*i];
150 if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 1;
151 if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 2;
152 if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 4;
153 if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 8;
156 for(;nc_count; nc_count--)
157 put_bits(&a->pb, ccp_tab[0][1], ccp_tab[0][0]);
159 put_bits(&a->pb, ccp_tab[ccp][1], ccp_tab[ccp][0]);
161 if(ccp&1) put_level(&a->pb, block[index + 0]);
162 if(ccp&2) put_level(&a->pb, block[index + 8]);
163 if(ccp&4) put_level(&a->pb, block[index + 1]);
164 if(ccp&8) put_level(&a->pb, block[index + 9]);
169 put_bits(&a->pb, ccp_tab[16][1], ccp_tab[16][0]);
172 #endif //CONFIG_ENCODERS
174 static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){
177 a->dsp.clear_blocks(block[0]);
180 if( decode_block(a, block[i]) < 0)
186 #ifdef CONFIG_ENCODERS
188 static inline void encode_mb(ASV1Context *a, DCTELEM block[6][64]){
192 encode_block(a, block[i]);
196 #endif //CONFIG_ENCODERS
198 static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){
199 DCTELEM (*block)[64]= a->block;
200 int linesize= a->picture.linesize[0];
202 uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
203 uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
204 uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
206 a->dsp.idct_put(dest_y , linesize, block[0]);
207 a->dsp.idct_put(dest_y + 8, linesize, block[1]);
208 a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
209 a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
211 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
212 a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]);
213 a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]);
217 #ifdef CONFIG_ENCODERS
219 static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){
220 DCTELEM (*block)[64]= a->block;
221 int linesize= a->picture.linesize[0];
224 uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
225 uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8;
226 uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8;
228 a->dsp.get_pixels(block[0], ptr_y , linesize);
229 a->dsp.get_pixels(block[1], ptr_y + 8, linesize);
230 a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize);
231 a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize);
233 a->dsp.fdct(block[i]);
235 if(!(a->avctx->flags&CODEC_FLAG_GRAY)){
236 a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]);
237 a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]);
239 a->dsp.fdct(block[i]);
243 #endif //CONFIG_ENCODERS
245 static int decode_frame(AVCodecContext *avctx,
246 void *data, int *data_size,
247 uint8_t *buf, int buf_size)
249 ASV1Context * const a = avctx->priv_data;
250 AVFrame *picture = data;
251 AVFrame * const p= (AVFrame*)&a->picture;
256 /* special case for last picture */
262 avctx->release_buffer(avctx, p);
265 if(avctx->get_buffer(avctx, p) < 0){
266 fprintf(stderr, "get_buffer() failed\n");
269 p->pict_type= I_TYPE;
272 a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
273 a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);
274 init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
276 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
277 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
278 if( decode_mb(a, a->block) <0)
281 idct_put(a, mb_x, mb_y);
285 if(a->mb_width2 != a->mb_width){
287 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
288 if( decode_mb(a, a->block) <0)
291 idct_put(a, mb_x, mb_y);
295 if(a->mb_height2 != a->mb_height){
297 for(mb_x=0; mb_x<a->mb_width; mb_x++){
298 if( decode_mb(a, a->block) <0)
301 idct_put(a, mb_x, mb_y);
306 printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
307 for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
308 printf("%d", get_bits1(&a->gb));
311 for(i=0; i<s->avctx->extradata_size; i++){
312 printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
316 p->quality= (32 + a->inv_qscale/2)/a->inv_qscale;
317 memset(p->qscale_table, p->quality, p->qstride*a->mb_height);
319 *picture= *(AVFrame*)&a->picture;
320 *data_size = sizeof(AVPicture);
324 return (get_bits_count(&a->gb)+31)/32*4;
327 #ifdef CONFIG_ENCODERS
329 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
330 ASV1Context * const a = avctx->priv_data;
331 AVFrame *pict = data;
332 AVFrame * const p= (AVFrame*)&a->picture;
336 init_put_bits(&a->pb, buf, buf_size, NULL, NULL);
339 p->pict_type= I_TYPE;
342 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
343 for(mb_x=0; mb_x<a->mb_width2; mb_x++){
344 dct_get(a, mb_x, mb_y);
345 encode_mb(a, a->block);
349 if(a->mb_width2 != a->mb_width){
351 for(mb_y=0; mb_y<a->mb_height2; mb_y++){
352 dct_get(a, mb_x, mb_y);
353 encode_mb(a, a->block);
357 if(a->mb_height2 != a->mb_height){
359 for(mb_x=0; mb_x<a->mb_width; mb_x++){
360 dct_get(a, mb_x, mb_y);
361 encode_mb(a, a->block);
366 align_put_bits(&a->pb);
367 while(get_bit_count(&a->pb)&31)
368 put_bits(&a->pb, 8, 0);
370 size= get_bit_count(&a->pb)/32;
372 a->dsp.bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
377 #endif //CONFIG_ENCODERS
379 static void common_init(AVCodecContext *avctx){
380 ASV1Context * const a = avctx->priv_data;
382 dsputil_init(&a->dsp, avctx);
384 a->mb_width = (avctx->width + 15) / 16;
385 a->mb_height = (avctx->height + 15) / 16;
386 a->mb_width2 = (avctx->width + 0) / 16;
387 a->mb_height2 = (avctx->height + 0) / 16;
389 avctx->coded_frame= (AVFrame*)&a->picture;
393 static int decode_init(AVCodecContext *avctx){
394 ASV1Context * const a = avctx->priv_data;
395 AVFrame *p= (AVFrame*)&a->picture;
400 ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);
402 a->inv_qscale= le2me_32(((uint32_t*)avctx->extradata)[0]);
403 if(a->inv_qscale == 0){
404 printf("illegal qscale 0\n");
409 int index= scantab[i];
410 a->intra_matrix[i]= 64*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
413 p->qstride= a->mb_width;
414 p->qscale_table= av_mallocz( p->qstride * a->mb_height);
419 #ifdef CONFIG_ENCODERS
421 static int encode_init(AVCodecContext *avctx){
422 ASV1Context * const a = avctx->priv_data;
427 if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE;
429 a->inv_qscale= (32*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality;
431 avctx->extradata= av_mallocz(8);
432 avctx->extradata_size=8;
433 ((uint32_t*)avctx->extradata)[0]= le2me_32(a->inv_qscale);
434 ((uint32_t*)avctx->extradata)[1]= le2me_32(ff_get_fourcc("ASUS"));
437 int q= 32*ff_mpeg1_default_intra_matrix[i];
438 a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q;
444 #endif //CONFIG_ENCODERS
446 static int decode_end(AVCodecContext *avctx){
447 ASV1Context * const a = avctx->priv_data;
449 av_freep(&a->bitstream_buffer);
450 av_freep(&a->picture.qscale_table);
451 a->bitstream_buffer_size=0;
453 avcodec_default_free_buffers(avctx);
458 AVCodec asv1_decoder = {
470 #ifdef CONFIG_ENCODERS
472 AVCodec asv1_encoder = {
482 #endif //CONFIG_ENCODERS