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ffmpeg.wasm-core
Commit c1708e8d authored by Michael Niedermayer's avatar Michael Niedermayer
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Simplify intra PCM MB handling. 

Originally committed as revision 14476 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 9f31c7ef
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Showing with 10 additions and 68 deletions
libavcodec/h264.c
View file @ c1708e8d
......@@ -2502,30 +2502,12 @@ static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
}
if (!simple && IS_INTRA_PCM(mb_type)) {
unsigned int x, y;
// The pixels are stored in h->mb array in the same order as levels,
// copy them in output in the correct order.
for(i=0; i<16; i++) {
for (y=0; y<4; y++) {
for (x=0; x<4; x++) {
*(dest_y + block_offset[i] + y*linesize + x) = h->mb[i*16+y*4+x];
}
}
}
for(i=16; i<16+4; i++) {
for (y=0; y<4; y++) {
for (x=0; x<4; x++) {
*(dest_cb + block_offset[i] + y*uvlinesize + x) = h->mb[i*16+y*4+x];
}
}
for (i=0; i<16; i++) {
memcpy(dest_y + i* linesize, h->mb + i*8, 16);
}
for(i=20; i<20+4; i++) {
for (y=0; y<4; y++) {
for (x=0; x<4; x++) {
*(dest_cr + block_offset[i] + y*uvlinesize + x) = h->mb[i*16+y*4+x];
}
}
for (i=0; i<8; i++) {
memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4, 8);
memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4, 8);
}
} else {
if(IS_INTRA(mb_type)){
......@@ -4405,34 +4387,14 @@ decode_intra_mb:
h->slice_table[ mb_xy ]= h->slice_num;
if(IS_INTRA_PCM(mb_type)){
unsigned int x, y;
unsigned int x;
// We assume these blocks are very rare so we do not optimize it.
align_get_bits(&s->gb);
// The pixels are stored in the same order as levels in h->mb array.
for(y=0; y<16; y++){
const int index= 4*(y&3) + 32*((y>>2)&1) + 128*(y>>3);
for(x=0; x<16; x++){
tprintf(s->avctx, "LUMA ICPM LEVEL (%3d)\n", show_bits(&s->gb, 8));
h->mb[index + (x&3) + 16*((x>>2)&1) + 64*(x>>3)]= get_bits(&s->gb, 8);
}
}
if(CHROMA){
for(y=0; y<8; y++){
const int index= 256 + 4*(y&3) + 32*(y>>2);
for(x=0; x<8; x++){
tprintf(s->avctx, "CHROMA U ICPM LEVEL (%3d)\n", show_bits(&s->gb, 8));
h->mb[index + (x&3) + 16*(x>>2)]= get_bits(&s->gb, 8);
}
}
for(y=0; y<8; y++){
const int index= 256 + 64 + 4*(y&3) + 32*(y>>2);
for(x=0; x<8; x++){
tprintf(s->avctx, "CHROMA V ICPM LEVEL (%3d)\n", show_bits(&s->gb, 8));
h->mb[index + (x&3) + 16*(x>>2)]= get_bits(&s->gb, 8);
}
}
for(x=0; x < (CHROMA ? 384 : 256); x++){
((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8);
}
// In deblocking, the quantizer is 0
......@@ -5545,7 +5507,6 @@ decode_intra_mb:
if(IS_INTRA_PCM(mb_type)) {
const uint8_t *ptr;
unsigned int x, y;
// We assume these blocks are very rare so we do not optimize it.
// FIXME The two following lines get the bitstream position in the cabac
......@@ -5557,28 +5518,9 @@ decode_intra_mb:
}
// The pixels are stored in the same order as levels in h->mb array.
for(y=0; y<16; y++){
const int index= 4*(y&3) + 32*((y>>2)&1) + 128*(y>>3);
for(x=0; x<16; x++){
tprintf(s->avctx, "LUMA ICPM LEVEL (%3d)\n", *ptr);
h->mb[index + (x&3) + 16*((x>>2)&1) + 64*(x>>3)]= *ptr++;
}
}
memcpy(h->mb, ptr, 256); ptr+=256;
if(CHROMA){
for(y=0; y<8; y++){
const int index= 256 + 4*(y&3) + 32*(y>>2);
for(x=0; x<8; x++){
tprintf(s->avctx, "CHROMA U ICPM LEVEL (%3d)\n", *ptr);
h->mb[index + (x&3) + 16*(x>>2)]= *ptr++;
}
}
for(y=0; y<8; y++){
const int index= 256 + 64 + 4*(y&3) + 32*(y>>2);
for(x=0; x<8; x++){
tprintf(s->avctx, "CHROMA V ICPM LEVEL (%3d)\n", *ptr);
h->mb[index + (x&3) + 16*(x>>2)]= *ptr++;
}
}
memcpy(h->mb+128, ptr, 128); ptr+=128;
}
ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);
......
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