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Horizontal and vertical prediction functions needed for new lossless mode

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of H.264.

Originally committed as revision 16168 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-12-16 19:39:01 +00:00
parent ca5b528ea1
commit d358caed7e
2 changed files with 96 additions and 0 deletions
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91
libavcodec/h264pred.c
View File

@ -987,6 +987,87 @@ static void pred8x8l_horizontal_up_c(uint8_t *src, int has_topleft, int has_topr
#undef PL
#undef SRC
static void pred4x4_vertical_add_c(uint8_t *pix, const DCTELEM *block, int stride){
int i;
for(i=0; i<4; i++){
pix[0]= pix[0-stride] + block[0];
pix[1]= pix[1-stride] + block[1];
pix[2]= pix[2-stride] + block[2];
pix[3]= pix[3-stride] + block[3];
pix+= stride;
block+= 4;
}
}
static void pred4x4_horizontal_add_c(uint8_t *pix, const DCTELEM *block, int stride){
int i;
for(i=0; i<4; i++){
pix[0]= pix[-1] + block[0];
pix[1]= pix[ 0] + block[1];
pix[2]= pix[ 1] + block[2];
pix[3]= pix[ 2] + block[3];
pix+= stride;
block+= 4;
}
}
static void pred8x8l_vertical_add_c(uint8_t *pix, const DCTELEM *block, int stride){
int i;
for(i=0; i<8; i++){
pix[0]= pix[0-stride] + block[0];
pix[1]= pix[1-stride] + block[1];
pix[2]= pix[2-stride] + block[2];
pix[3]= pix[3-stride] + block[3];
pix[4]= pix[4-stride] + block[4];
pix[5]= pix[5-stride] + block[5];
pix[6]= pix[6-stride] + block[6];
pix[7]= pix[7-stride] + block[7];
pix+= stride;
block+= 8;
}
}
static void pred8x8l_horizontal_add_c(uint8_t *pix, const DCTELEM *block, int stride){
int i;
for(i=0; i<8; i++){
pix[0]= pix[-1] + block[0];
pix[1]= pix[ 0] + block[1];
pix[2]= pix[ 1] + block[2];
pix[3]= pix[ 2] + block[3];
pix[4]= pix[ 3] + block[4];
pix[5]= pix[ 4] + block[5];
pix[6]= pix[ 5] + block[6];
pix[7]= pix[ 6] + block[7];
pix+= stride;
block+= 8;
}
}
static void pred16x16_vertical_add_c(uint8_t *pix, const int *block_offset, const DCTELEM *block, int stride){
int i;
for(i=0; i<16; i++)
pred4x4_vertical_add_c(pix + block_offset[i], block + i*16, stride);
}
static void pred16x16_horizontal_add_c(uint8_t *pix, const int *block_offset, const DCTELEM *block, int stride){
int i;
for(i=0; i<16; i++)
pred4x4_horizontal_add_c(pix + block_offset[i], block + i*16, stride);
}
static void pred8x8_vertical_add_c(uint8_t *pix, const int *block_offset, const DCTELEM *block, int stride){
int i;
for(i=0; i<4; i++)
pred4x4_vertical_add_c(pix + block_offset[i], block + i*16, stride);
}
static void pred8x8_horizontal_add_c(uint8_t *pix, const int *block_offset, const DCTELEM *block, int stride){
int i;
for(i=0; i<4; i++)
pred4x4_horizontal_add_c(pix + block_offset[i], block + i*16, stride);
}
/**
* Sets the intra prediction function pointers.
*/
@ -1075,4 +1156,14 @@ void ff_h264_pred_init(H264PredContext *h, int codec_id){
h->pred16x16[LEFT_DC_PRED8x8]= pred16x16_left_dc_c;
h->pred16x16[TOP_DC_PRED8x8 ]= pred16x16_top_dc_c;
h->pred16x16[DC_128_PRED8x8 ]= pred16x16_128_dc_c;
//special lossless h/v prediction for h264
h->pred4x4_add [VERT_PRED ]= pred4x4_vertical_add_c;
h->pred4x4_add [ HOR_PRED ]= pred4x4_horizontal_add_c;
h->pred8x8l_add [VERT_PRED ]= pred8x8l_vertical_add_c;
h->pred8x8l_add [ HOR_PRED ]= pred8x8l_horizontal_add_c;
h->pred8x8_add [VERT_PRED8x8]= pred8x8_vertical_add_c;
h->pred8x8_add [ HOR_PRED8x8]= pred8x8_horizontal_add_c;
h->pred16x16_add[VERT_PRED8x8]= pred16x16_vertical_add_c;
h->pred16x16_add[ HOR_PRED8x8]= pred16x16_horizontal_add_c;
}

5
libavcodec/h264pred.h
View File

@ -75,6 +75,11 @@ typedef struct H264PredContext{
void (*pred8x8l [9+3])(uint8_t *src, int topleft, int topright, int stride);
void (*pred8x8 [4+3+4])(uint8_t *src, int stride);
void (*pred16x16[4+3])(uint8_t *src, int stride);
void (*pred4x4_add [2])(uint8_t *pix/*align 4*/, const DCTELEM *block/*align 16*/, int stride);
void (*pred8x8l_add [2])(uint8_t *pix/*align 8*/, const DCTELEM *block/*align 16*/, int stride);
void (*pred8x8_add [3])(uint8_t *pix/*align 8*/, const int *block_offset, const DCTELEM *block/*align 16*/, int stride);
void (*pred16x16_add[3])(uint8_t *pix/*align 16*/, const int *block_offset, const DCTELEM *block/*align 16*/, int stride);
}H264PredContext;
void ff_h264_pred_init(H264PredContext *h, int codec_id);