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ffmpeg.wasm-core
Commit b73a8922 authored by Anton Khirnov's avatar Anton Khirnov
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ljpegenc: split yuv encoding into a separate function

parent fa447681
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Showing with 93 additions and 74 deletions
libavcodec/ljpegenc.c
View file @ b73a8922
......@@ -112,6 +112,94 @@ static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
return 0;
}
static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
const AVFrame *frame, int predictor,
int mb_x, int mb_y)
{
int i;
if (mb_x == 0 || mb_y == 0) {
for (i = 0; i < 3; i++) {
uint8_t *ptr;
int x, y, h, v, linesize;
h = s->hsample[i];
v = s->vsample[i];
linesize = frame->linesize[i];
for (y = 0; y < v; y++) {
for (x = 0; x < h; x++) {
int pred;
ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
if (y == 0 && mb_y == 0) {
if (x == 0 && mb_x == 0)
pred = 128;
else
pred = ptr[-1];
} else {
if (x == 0 && mb_x == 0) {
pred = ptr[-linesize];
} else {
PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
ptr[-1], predictor);
}
}
if (i == 0)
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
else
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
} else {
for (i = 0; i < 3; i++) {
uint8_t *ptr;
int x, y, h, v, linesize;
h = s->hsample[i];
v = s->vsample[i];
linesize = frame->linesize[i];
for (y = 0; y < v; y++) {
for (x = 0; x < h; x++) {
int pred;
ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
if (i == 0)
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
else
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
}
}
static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
const AVFrame *frame)
{
const int predictor = avctx->prediction_method + 1;
LJpegEncContext *s = avctx->priv_data;
const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0];
const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
int mb_x, mb_y;
for (mb_y = 0; mb_y < mb_height; mb_y++) {
if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) <
mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
for (mb_x = 0; mb_x < mb_width; mb_x++)
ljpeg_encode_yuv_mb(s, pb, frame, predictor, mb_x, mb_y);
}
return 0;
}
static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pict, int *got_packet)
{
......@@ -119,7 +207,6 @@ static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
PutBitContext pb;
const int width = avctx->width;
const int height = avctx->height;
const int predictor= avctx->prediction_method+1;
const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0];
const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
int max_pkt_size = FF_MIN_BUFFER_SIZE;
......@@ -143,80 +230,12 @@ static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
header_bits = put_bits_count(&pb);
if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
if (avctx->pix_fmt == AV_PIX_FMT_BGR24)
ret = ljpeg_encode_bgr(avctx, &pb, pict);
if (ret < 0)
return ret;
}else{
int mb_x, mb_y, i;
for(mb_y = 0; mb_y < mb_height; mb_y++) {
if (pb.buf_end - pb.buf - (put_bits_count(&pb) >> 3) <
mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
for(mb_x = 0; mb_x < mb_width; mb_x++) {
if(mb_x==0 || mb_y==0){
for(i=0;i<3;i++) {
uint8_t *ptr;
int x, y, h, v, linesize;
h = s->hsample[i];
v = s->vsample[i];
linesize = pict->linesize[i];
for(y=0; y<v; y++){
for(x=0; x<h; x++){
int pred;
ptr = pict->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
if(y==0 && mb_y==0){
if(x==0 && mb_x==0){
pred= 128;
}else{
pred= ptr[-1];
}
}else{
if(x==0 && mb_x==0){
pred= ptr[-linesize];
}else{
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
}
}
if(i==0)
ff_mjpeg_encode_dc(&pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
else
ff_mjpeg_encode_dc(&pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
}else{
for(i=0;i<3;i++) {
uint8_t *ptr;
int x, y, h, v, linesize;
h = s->hsample[i];
v = s->vsample[i];
linesize = pict->linesize[i];
for(y=0; y<v; y++){
for(x=0; x<h; x++){
int pred;
ptr = pict->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
if(i==0)
ff_mjpeg_encode_dc(&pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
else
ff_mjpeg_encode_dc(&pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
}
}
}
}
else
ret = ljpeg_encode_yuv(avctx, &pb, pict);
if (ret < 0)
return ret;
emms_c();
......
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