diff options
author | Anton Khirnov <anton@khirnov.net> | 2013-12-02 23:56:51 +0100 |
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committer | Anton Khirnov <anton@khirnov.net> | 2013-12-05 13:38:07 +0100 |
commit | b73a8922d818c7f909855557718d4c3bfacbd92d (patch) | |
tree | 0d2d5314eec0f7757bdfe843879fa32c4ad17d81 /libavcodec/ljpegenc.c | |
parent | fa4476815d0d27996eb199452f2cdbfccdd244a5 (diff) | |
download | ffmpeg-b73a8922d818c7f909855557718d4c3bfacbd92d.tar.gz |
ljpegenc: split yuv encoding into a separate function
Diffstat (limited to 'libavcodec/ljpegenc.c')
-rw-r--r-- | libavcodec/ljpegenc.c | 167 |
1 files changed, 93 insertions, 74 deletions
diff --git a/libavcodec/ljpegenc.c b/libavcodec/ljpegenc.c index e819c57098..7eb4675768 100644 --- a/libavcodec/ljpegenc.c +++ b/libavcodec/ljpegenc.c @@ -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(); |