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ffmpeg.wasm-core
Commit 5d4bd9cc authored by Oskar Arvidsson's avatar Oskar Arvidsson Committed by Ronald S. Bultje
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Template h264idct_template.c with respect to pixel size, etc. 

Preparatory patch for high bit depth h264 decoding support.
Signed-off-by: 's avatarRonald S. Bultje <rsbultje@gmail.com>
parent de3e7607
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Showing with 64 additions and 45 deletions
libavcodec/h264idct_template.c
View file @ 5d4bd9cc
......@@ -42,9 +42,18 @@ static const uint8_t scan8[16 + 2*4]={
};
#endif
static av_always_inline void idct_internal(uint8_t *dst, DCTELEM *block, int stride, int block_stride, int shift, int add){
#define pixel uint8_t
#define dctcoef DCTELEM
#define INIT_CLIP uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
#define CLIP(a) cm[a]
#define FUNCC(a) a ## _c
static av_always_inline void FUNCC(idct_internal)(uint8_t *_dst, DCTELEM *_block, int stride, int block_stride, int shift, int add){
int i;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
INIT_CLIP
pixel *dst = (pixel*)_dst;
dctcoef *block = (dctcoef*)_block;
stride /= sizeof(pixel);
block[0] += 1<<(shift-1);
......@@ -66,28 +75,31 @@ static av_always_inline void idct_internal(uint8_t *dst, DCTELEM *block, int str
const int z2= (block[1 + block_stride*i]>>1) - block[3 + block_stride*i];
const int z3= block[1 + block_stride*i] + (block[3 + block_stride*i]>>1);
dst[i + 0*stride]= cm[ add*dst[i + 0*stride] + ((z0 + z3) >> shift) ];
dst[i + 1*stride]= cm[ add*dst[i + 1*stride] + ((z1 + z2) >> shift) ];
dst[i + 2*stride]= cm[ add*dst[i + 2*stride] + ((z1 - z2) >> shift) ];
dst[i + 3*stride]= cm[ add*dst[i + 3*stride] + ((z0 - z3) >> shift) ];
dst[i + 0*stride]= CLIP(add*dst[i + 0*stride] + ((z0 + z3) >> shift));
dst[i + 1*stride]= CLIP(add*dst[i + 1*stride] + ((z1 + z2) >> shift));
dst[i + 2*stride]= CLIP(add*dst[i + 2*stride] + ((z1 - z2) >> shift));
dst[i + 3*stride]= CLIP(add*dst[i + 3*stride] + ((z0 - z3) >> shift));
}
}
void ff_h264_idct_add_c(uint8_t *dst, DCTELEM *block, int stride){
idct_internal(dst, block, stride, 4, 6, 1);
void FUNCC(ff_h264_idct_add)(uint8_t *dst, DCTELEM *block, int stride){
FUNCC(idct_internal)(dst, block, stride, 4, 6, 1);
}
void ff_h264_lowres_idct_add_c(uint8_t *dst, int stride, DCTELEM *block){
idct_internal(dst, block, stride, 8, 3, 1);
void FUNCC(ff_h264_lowres_idct_add)(uint8_t *dst, int stride, DCTELEM *block){
FUNCC(idct_internal)(dst, block, stride, 8, 3, 1);
}
void ff_h264_lowres_idct_put_c(uint8_t *dst, int stride, DCTELEM *block){
idct_internal(dst, block, stride, 8, 3, 0);
void FUNCC(ff_h264_lowres_idct_put)(uint8_t *dst, int stride, DCTELEM *block){
FUNCC(idct_internal)(dst, block, stride, 8, 3, 0);
}
void ff_h264_idct8_add_c(uint8_t *dst, DCTELEM *block, int stride){
void FUNCC(ff_h264_idct8_add)(uint8_t *_dst, DCTELEM *_block, int stride){
int i;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
INIT_CLIP
pixel *dst = (pixel*)_dst;
dctcoef *block = (dctcoef*)_block;
stride /= sizeof(pixel);
block[0] += 32;
......@@ -144,90 +156,96 @@ void ff_h264_idct8_add_c(uint8_t *dst, DCTELEM *block, int stride){
const int b5 = (a3>>2) - a5;
const int b7 = a7 - (a1>>2);
dst[i + 0*stride] = cm[ dst[i + 0*stride] + ((b0 + b7) >> 6) ];
dst[i + 1*stride] = cm[ dst[i + 1*stride] + ((b2 + b5) >> 6) ];
dst[i + 2*stride] = cm[ dst[i + 2*stride] + ((b4 + b3) >> 6) ];
dst[i + 3*stride] = cm[ dst[i + 3*stride] + ((b6 + b1) >> 6) ];
dst[i + 4*stride] = cm[ dst[i + 4*stride] + ((b6 - b1) >> 6) ];
dst[i + 5*stride] = cm[ dst[i + 5*stride] + ((b4 - b3) >> 6) ];
dst[i + 6*stride] = cm[ dst[i + 6*stride] + ((b2 - b5) >> 6) ];
dst[i + 7*stride] = cm[ dst[i + 7*stride] + ((b0 - b7) >> 6) ];
dst[i + 0*stride] = CLIP( dst[i + 0*stride] + ((b0 + b7) >> 6) );
dst[i + 1*stride] = CLIP( dst[i + 1*stride] + ((b2 + b5) >> 6) );
dst[i + 2*stride] = CLIP( dst[i + 2*stride] + ((b4 + b3) >> 6) );
dst[i + 3*stride] = CLIP( dst[i + 3*stride] + ((b6 + b1) >> 6) );
dst[i + 4*stride] = CLIP( dst[i + 4*stride] + ((b6 - b1) >> 6) );
dst[i + 5*stride] = CLIP( dst[i + 5*stride] + ((b4 - b3) >> 6) );
dst[i + 6*stride] = CLIP( dst[i + 6*stride] + ((b2 - b5) >> 6) );
dst[i + 7*stride] = CLIP( dst[i + 7*stride] + ((b0 - b7) >> 6) );
}
}
// assumes all AC coefs are 0
void ff_h264_idct_dc_add_c(uint8_t *dst, DCTELEM *block, int stride){
void FUNCC(ff_h264_idct_dc_add)(uint8_t *_dst, DCTELEM *block, int stride){
int i, j;
int dc = (block[0] + 32) >> 6;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP + dc;
int dc = (((dctcoef*)block)[0] + 32) >> 6;
INIT_CLIP
pixel *dst = (pixel*)_dst;
stride /= sizeof(pixel);
for( j = 0; j < 4; j++ )
{
for( i = 0; i < 4; i++ )
dst[i] = cm[ dst[i] ];
dst[i] = CLIP( dst[i] + dc );
dst += stride;
}
}
void ff_h264_idct8_dc_add_c(uint8_t *dst, DCTELEM *block, int stride){
void FUNCC(ff_h264_idct8_dc_add)(uint8_t *_dst, DCTELEM *block, int stride){
int i, j;
int dc = (block[0] + 32) >> 6;
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP + dc;
int dc = (((dctcoef*)block)[0] + 32) >> 6;
INIT_CLIP
pixel *dst = (pixel*)_dst;
stride /= sizeof(pixel);
for( j = 0; j < 8; j++ )
{
for( i = 0; i < 8; i++ )
dst[i] = cm[ dst[i] ];
dst[i] = CLIP( dst[i] + dc );
dst += stride;
}
}
void ff_h264_idct_add16_c(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
void FUNCC(ff_h264_idct_add16)(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
int i;
for(i=0; i<16; i++){
int nnz = nnzc[ scan8[i] ];
if(nnz){
if(nnz==1 && block[i*16]) ff_h264_idct_dc_add_c(dst + block_offset[i], block + i*16, stride);
else idct_internal (dst + block_offset[i], block + i*16, stride, 4, 6, 1);
if(nnz==1 && ((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
else FUNCC(idct_internal )(dst + block_offset[i], block + i*16*sizeof(pixel), stride, 4, 6, 1);
}
}
}
void ff_h264_idct_add16intra_c(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
void FUNCC(ff_h264_idct_add16intra)(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
int i;
for(i=0; i<16; i++){
if(nnzc[ scan8[i] ]) idct_internal (dst + block_offset[i], block + i*16, stride, 4, 6, 1);
else if(block[i*16]) ff_h264_idct_dc_add_c(dst + block_offset[i], block + i*16, stride);
if(nnzc[ scan8[i] ]) FUNCC(idct_internal )(dst + block_offset[i], block + i*16*sizeof(pixel), stride, 4, 6, 1);
else if(((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
}
}
void ff_h264_idct8_add4_c(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
void FUNCC(ff_h264_idct8_add4)(uint8_t *dst, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
int i;
for(i=0; i<16; i+=4){
int nnz = nnzc[ scan8[i] ];
if(nnz){
if(nnz==1 && block[i*16]) ff_h264_idct8_dc_add_c(dst + block_offset[i], block + i*16, stride);
else ff_h264_idct8_add_c (dst + block_offset[i], block + i*16, stride);
if(nnz==1 && ((dctcoef*)block)[i*16]) FUNCC(ff_h264_idct8_dc_add)(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
else FUNCC(ff_h264_idct8_add )(dst + block_offset[i], block + i*16*sizeof(pixel), stride);
}
}
}
void ff_h264_idct_add8_c(uint8_t **dest, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
void FUNCC(ff_h264_idct_add8)(uint8_t **dest, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[6*8]){
int i;
for(i=16; i<16+8; i++){
if(nnzc[ scan8[i] ])
ff_h264_idct_add_c (dest[(i&4)>>2] + block_offset[i], block + i*16, stride);
else if(block[i*16])
ff_h264_idct_dc_add_c(dest[(i&4)>>2] + block_offset[i], block + i*16, stride);
FUNCC(ff_h264_idct_add )(dest[(i&4)>>2] + block_offset[i], block + i*16*sizeof(pixel), stride);
else if(((dctcoef*)block)[i*16])
FUNCC(ff_h264_idct_dc_add)(dest[(i&4)>>2] + block_offset[i], block + i*16*sizeof(pixel), stride);
}
}
/**
* IDCT transforms the 16 dc values and dequantizes them.
* @param qp quantization parameter
*/
void ff_h264_luma_dc_dequant_idct_c(DCTELEM *output, DCTELEM *input, int qmul){
void FUNCC(ff_h264_luma_dc_dequant_idct)(DCTELEM *_output, DCTELEM *_input, int qmul){
#define stride 16
int i;
int temp[16];
static const uint8_t x_offset[4]={0, 2*stride, 8*stride, 10*stride};
dctcoef *input = (dctcoef*)_input;
dctcoef *output = (dctcoef*)_output;
for(i=0; i<4; i++){
const int z0= input[4*i+0] + input[4*i+1];
......@@ -256,10 +274,11 @@ void ff_h264_luma_dc_dequant_idct_c(DCTELEM *output, DCTELEM *input, int qmul){
#undef stride
}
void ff_h264_chroma_dc_dequant_idct_c(DCTELEM *block, int qmul){
void FUNCC(ff_h264_chroma_dc_dequant_idct)(DCTELEM *_block, int qmul){
const int stride= 16*2;
const int xStride= 16;
int a,b,c,d,e;
dctcoef *block = (dctcoef*)_block;
a= block[stride*0 + xStride*0];
b= block[stride*0 + xStride*1];
......
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