102 uint16_t intra_matrix[64])
172 size = strlen(
"CS=ITU601")+3;
179 uint16_t intra_matrix[64])
181 int chroma_h_shift, chroma_v_shift;
183 int hsample[3], vsample[3];
190 vsample[0] = hsample[0] =
191 vsample[1] = hsample[1] =
192 vsample[2] = hsample[2] = 1;
195 vsample[1] = 2 >> chroma_v_shift;
196 vsample[2] = 2 >> chroma_v_shift;
198 hsample[1] = 2 >> chroma_h_shift;
199 hsample[2] = 2 >> chroma_h_shift;
277 int align= (-(size_t)(buf))&3;
279 assert((size&7) == 0);
283 for(i=0; i<size && i<align; i++){
284 if(buf[i]==0xFF) ff_count++;
286 for(; i<size-15; i+=16){
289 v= *(uint32_t*)(&buf[i]);
290 acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
291 v= *(uint32_t*)(&buf[i+4]);
292 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
293 v= *(uint32_t*)(&buf[i+8]);
294 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
295 v= *(uint32_t*)(&buf[i+12]);
296 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
304 if(buf[i]==0xFF) ff_count++;
307 if(ff_count==0)
return;
312 for(i=size-1; ff_count; i--){
328 if(length)
put_bits(pbc, length, (1<<length)-1);
336 assert((header_bits & 7) == 0);
344 uint8_t *huff_size, uint16_t *huff_code)
349 put_bits(pb, huff_size[0], huff_code[0]);
359 put_bits(pb, huff_size[nbits], huff_code[nbits]);
367 int mant, nbits, code, i, j;
368 int component,
dc,
run, last_index, val;
371 uint16_t *huff_code_ac;
374 component = (n <= 3 ? 0 : (n&1) + 1);
376 val = dc - s->
last_dc[component];
392 for(i=1;i<=last_index;i++) {
399 put_bits(&s->
pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
409 code = (run << 4) | nbits;
411 put_bits(&s->
pb, huff_size_ac[code], huff_code_ac[code]);
419 if (last_index < 63 || run != 0)
420 put_bits(&s->
pb, huff_size_ac[0], huff_code_ac[0]);