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| author | wm4 <nfxjfg@googlemail.com> | 2014-09-27 16:47:09 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-10-02 20:21:00 +0200 |
| commit | cdd6f059a65f28ff7a18ccf1194e9554adad1a1b (patch) | |
| tree | f85077e1a32a10003a595e46d403e75e4797bd9e /libavcodec/utils.c | |
| parent | a9b10e1510ddfcae5119e616e0cc60350c99467c (diff) | |
| download | ffmpeg-cdd6f059a65f28ff7a18ccf1194e9554adad1a1b.tar.gz | |
avcodec, avutil: allow more control about how samples are skipped
Add CODEC_FLAG2_SKIP_MANUAL (exposed as "skip_manual"), which makes
the decoder export sample skip information via side data, instead
of applying it automatically. The format of the side data is the
same as AV_PKT_DATA_SKIP_SAMPLES, but since AVPacket and AVFrame
side data constants overlap, AV_FRAME_DATA_SKIP_SAMPLES needs to
be introduced.
This is useful for applications which want to do the timestamp
calculations manually, or which actually want to retrieve the
padding.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/utils.c')
| -rw-r--r-- | libavcodec/utils.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/libavcodec/utils.c b/libavcodec/utils.c index 778bdc6c2d..ee9e24805b 100644 --- a/libavcodec/utils.c +++ b/libavcodec/utils.c @@ -2448,6 +2448,8 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx, uint8_t *side; int side_size; uint32_t discard_padding = 0; + uint8_t skip_reason = 0; + uint8_t discard_reason = 0; // copy to ensure we do not change avpkt AVPacket tmp = *avpkt; int did_split = av_packet_split_side_data(&tmp); @@ -2488,8 +2490,11 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx, av_log(avctx, AV_LOG_DEBUG, "skip %d samples due to side data\n", avctx->internal->skip_samples); discard_padding = AV_RL32(side + 4); + skip_reason = AV_RL8(side + 8); + discard_reason = AV_RL8(side + 9); } - if (avctx->internal->skip_samples && *got_frame_ptr) { + if (avctx->internal->skip_samples && *got_frame_ptr && + !(avctx->flags2 & CODEC_FLAG2_SKIP_MANUAL)) { if(frame->nb_samples <= avctx->internal->skip_samples){ *got_frame_ptr = 0; avctx->internal->skip_samples -= frame->nb_samples; @@ -2518,7 +2523,8 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx, } } - if (discard_padding > 0 && discard_padding <= frame->nb_samples && *got_frame_ptr) { + if (discard_padding > 0 && discard_padding <= frame->nb_samples && *got_frame_ptr && + !(avctx->flags2 & CODEC_FLAG2_SKIP_MANUAL)) { if (discard_padding == frame->nb_samples) { *got_frame_ptr = 0; } else { @@ -2536,6 +2542,17 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx, frame->nb_samples -= discard_padding; } } + + if ((avctx->flags2 & CODEC_FLAG2_SKIP_MANUAL) && *got_frame_ptr) { + AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10); + if (fside) { + AV_WL32(fside->data, avctx->internal->skip_samples); + AV_WL32(fside->data + 4, discard_padding); + AV_WL8(fside->data + 8, skip_reason); + AV_WL8(fside->data + 9, discard_reason); + avctx->internal->skip_samples = 0; + } + } fail: avctx->internal->pkt = NULL; if (did_split) { |