87 const uint8_t *bits_table,
const uint8_t *value_table)
192 size = strlen(
"CS=ITU601")+3;
283 uint8_t *buf= s->
pb.
buf + start;
284 int align= (-(size_t)(buf))&3;
286 assert((size&7) == 0);
290 for(i=0; i<size && i<align; i++){
291 if(buf[i]==0xFF) ff_count++;
293 for(; i<size-15; i+=16){
296 v= *(uint32_t*)(&buf[i]);
297 acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
298 v= *(uint32_t*)(&buf[i+4]);
299 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
300 v= *(uint32_t*)(&buf[i+8]);
301 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
302 v= *(uint32_t*)(&buf[i+12]);
303 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
311 if(buf[i]==0xFF) ff_count++;
314 if(ff_count==0)
return;
319 for(i=size-1; ff_count; i--){
336 if(length)
put_bits(pbc, length, (1<<length)-1);
352 uint8_t *huff_size, uint16_t *huff_code)
365 nbits= av_log2_16bit(val) + 1;
367 put_bits(&s->
pb, huff_size[nbits], huff_code[nbits]);
375 int mant, nbits, code, i, j;
376 int component, dc,
run, last_index, val;
378 uint8_t *huff_size_ac;
379 uint16_t *huff_code_ac;
382 component = (n <= 3 ? 0 : (n&1) + 1);
384 val = dc - s->
last_dc[component];
400 for(i=1;i<=last_index;i++) {
407 put_bits(&s->
pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
416 nbits= av_log2(val) + 1;
417 code = (run << 4) | nbits;
419 put_bits(&s->
pb, huff_size_ac[code], huff_code_ac[code]);
427 if (last_index < 63 || run != 0)
428 put_bits(&s->
pb, huff_size_ac[0], huff_code_ac[0]);