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ffmpeg.wasm-core
Commit 7c5ab7b8 authored by Michael Niedermayer's avatar Michael Niedermayer
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slices & encoding optim 

Originally committed as revision 1217 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 22f3e8be
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Showing with 75 additions and 29 deletions
libavcodec/huffyuv.c
View file @ 7c5ab7b8
......@@ -51,6 +51,7 @@ typedef struct HYuvContext{
int width, height;
int flags;
int picture_number;
int last_slice_end;
int linesize[3];
uint8_t __align8 temp[3][2500];
uint64_t stats[3][256];
......@@ -157,15 +158,24 @@ static inline void add_left_prediction_bgr32(uint8_t *dst, uint8_t *src, int w,
*blue= b;
}
//FIXME optimize
static inline int sub_left_prediction(uint8_t *dst, uint8_t *src, int w, int left){
static inline int sub_left_prediction(HYuvContext *s, uint8_t *dst, uint8_t *src, int w, int left){
int i;
for(i=0; i<w; i++){
const int temp= src[i];
dst[i]= temp - left;
left= temp;
if(w<32){
for(i=0; i<w; i++){
const int temp= src[i];
dst[i]= temp - left;
left= temp;
}
return left;
}else{
for(i=0; i<16; i++){
const int temp= src[i];
dst[i]= temp - left;
left= temp;
}
s->dsp.diff_bytes(dst+16, src+16, src+15, w-16);
return src[w-1];
}
return left;
}
static void read_len_table(uint8_t *dst, GetBitContext *gb){
......@@ -648,6 +658,32 @@ static void decode_bgr_bitstream(HYuvContext *s, int count){
}
}
static void draw_slice(HYuvContext *s, int y){
int h, cy;
UINT8 *src_ptr[3];
if(s->avctx->draw_horiz_band==NULL)
return;
h= y - s->last_slice_end;
y -= h;
if(s->bitstream_bpp==12){
cy= y>>1;
}else{
cy= y;
}
src_ptr[0] = s->picture[0] + s->linesize[0]*y;
src_ptr[1] = s->picture[1] + s->linesize[1]*cy;
src_ptr[2] = s->picture[2] + s->linesize[2]*cy;
emms_c();
s->avctx->draw_horiz_band(s->avctx, src_ptr, s->linesize[0], y, s->width, h);
s->last_slice_end= y + h;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size){
HYuvContext *s = avctx->priv_data;
const int width= s->width;
......@@ -684,6 +720,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
fake_ystride= s->interlaced ? s->linesize[0]*2 : s->linesize[0];
fake_ustride= s->interlaced ? s->linesize[1]*2 : s->linesize[1];
fake_vstride= s->interlaced ? s->linesize[2]*2 : s->linesize[2];
s->last_slice_end= 0;
if(s->bitstream_bpp<24){
int y, cy;
......@@ -732,6 +770,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
if(y>=s->height) break;
}
draw_slice(s, y);
ydst= s->picture[0] + s->linesize[0]*y;
udst= s->picture[1] + s->linesize[1]*cy;
vdst= s->picture[2] + s->linesize[2]*cy;
......@@ -753,6 +793,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
}
}
}
draw_slice(s, height);
break;
case MEDIAN:
/* first line except first 2 pixels is left predicted */
......@@ -808,6 +850,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
}
if(y>=height) break;
}
draw_slice(s, y);
decode_422_bitstream(s, width);
......@@ -821,6 +864,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
add_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
}
}
draw_slice(s, height);
break;
}
}
......@@ -859,6 +904,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
}
}
}
draw_slice(s, height); // just 1 large slice as this isnt possible in reverse order
break;
default:
fprintf(stderr, "prediction type not supported!\n");
......@@ -922,9 +968,9 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
put_bits(&s->pb, 8, leftu= s->picture[1][0]);
put_bits(&s->pb, 8, s->picture[0][0]);
lefty= sub_left_prediction(s->temp[0], s->picture[0]+2, width-2 , lefty);
leftu= sub_left_prediction(s->temp[1], s->picture[1]+1, width2-1, leftu);
leftv= sub_left_prediction(s->temp[2], s->picture[2]+1, width2-1, leftv);
lefty= sub_left_prediction(s, s->temp[0], s->picture[0]+2, width-2 , lefty);
leftu= sub_left_prediction(s, s->temp[1], s->picture[1]+1, width2-1, leftu);
leftv= sub_left_prediction(s, s->temp[2], s->picture[2]+1, width2-1, leftv);
encode_422_bitstream(s, width-2);
......@@ -932,17 +978,17 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
int lefttopy, lefttopu, lefttopv;
cy=y=1;
if(s->interlaced){
lefty= sub_left_prediction(s->temp[0], s->picture[0]+s->linesize[0], width , lefty);
leftu= sub_left_prediction(s->temp[1], s->picture[1]+s->linesize[1], width2, leftu);
leftv= sub_left_prediction(s->temp[2], s->picture[2]+s->linesize[2], width2, leftv);
lefty= sub_left_prediction(s, s->temp[0], s->picture[0]+s->linesize[0], width , lefty);
leftu= sub_left_prediction(s, s->temp[1], s->picture[1]+s->linesize[1], width2, leftu);
leftv= sub_left_prediction(s, s->temp[2], s->picture[2]+s->linesize[2], width2, leftv);
encode_422_bitstream(s, width);
y++; cy++;
}
lefty= sub_left_prediction(s->temp[0], s->picture[0]+fake_ystride, 4, lefty);
leftu= sub_left_prediction(s->temp[1], s->picture[1]+fake_ystride, 2, leftu);
leftv= sub_left_prediction(s->temp[2], s->picture[2]+fake_ystride, 2, leftv);
lefty= sub_left_prediction(s, s->temp[0], s->picture[0]+fake_ystride, 4, lefty);
leftu= sub_left_prediction(s, s->temp[1], s->picture[1]+fake_ystride, 2, leftu);
leftv= sub_left_prediction(s, s->temp[2], s->picture[2]+fake_ystride, 2, leftv);
encode_422_bitstream(s, 4);
......@@ -986,11 +1032,11 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
ydst= s->picture[0] + s->linesize[0]*y;
if(s->predictor == PLANE && s->interlaced < y){
s->dsp.diff_bytes(s->temp[0], ydst, ydst - fake_ystride, width);
s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
lefty= sub_left_prediction(s->temp[0], s->temp[0], width , lefty);
lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
}else{
lefty= sub_left_prediction(s->temp[0], ydst, width , lefty);
lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);
}
encode_gray_bitstream(s, width);
y++;
......@@ -1002,17 +1048,17 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
vdst= s->picture[2] + s->linesize[2]*cy;
if(s->predictor == PLANE && s->interlaced < cy){
s->dsp.diff_bytes(s->temp[0], ydst, ydst - fake_ystride, width);
s->dsp.diff_bytes(s->temp[1], udst, udst - fake_ustride, width2);
s->dsp.diff_bytes(s->temp[2], vdst, vdst - fake_vstride, width2);
s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);
s->dsp.diff_bytes(s->temp[3], vdst, vdst - fake_vstride, width2);
lefty= sub_left_prediction(s->temp[0], s->temp[0], width , lefty);
leftu= sub_left_prediction(s->temp[1], s->temp[1], width2, leftu);
leftv= sub_left_prediction(s->temp[2], s->temp[2], width2, leftv);
lefty= sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
leftu= sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);
leftv= sub_left_prediction(s, s->temp[2], s->temp[3], width2, leftv);
}else{
lefty= sub_left_prediction(s->temp[0], ydst, width , lefty);
leftu= sub_left_prediction(s->temp[1], udst, width2, leftu);
leftv= sub_left_prediction(s->temp[2], vdst, width2, leftv);
lefty= sub_left_prediction(s, s->temp[0], ydst, width , lefty);
leftu= sub_left_prediction(s, s->temp[1], udst, width2, leftu);
leftv= sub_left_prediction(s, s->temp[2], vdst, width2, leftv);
}
encode_422_bitstream(s, width);
......@@ -1069,7 +1115,7 @@ AVCodec huffyuv_decoder = {
NULL,
decode_end,
decode_frame,
CODEC_CAP_DR1,
CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,
NULL
};
......
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