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| author | Kirill Gavrilov <kirill@sview.ru> | 2015-10-27 18:27:03 +0100 |
|---|---|---|
| committer | Vittorio Giovara <vittorio.giovara@gmail.com> | 2015-10-30 12:46:56 +0100 |
| commit | 1720791e36f9cc24c05efea5bb275ab52156ce50 (patch) | |
| tree | 76b37115ae52e258ea3bc04c66e31727d6fd624c /libavcodec/pngdec.c | |
| parent | 00b62968d079e63bf22028f253ac297292436ebe (diff) | |
| download | ffmpeg-1720791e36f9cc24c05efea5bb275ab52156ce50.tar.gz | |
png: read and write stereo3d frame side data information
Use optional sTER chunk defining side-by-side stereo pair
within "Extensions to the PNG 1.2 Specification", version 1.3.0.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Diffstat (limited to 'libavcodec/pngdec.c')
| -rw-r--r-- | libavcodec/pngdec.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index 5fa7a2dfdf..b52bf602e5 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -21,6 +21,8 @@ #include "libavutil/avstring.h" #include "libavutil/imgutils.h" +#include "libavutil/stereo3d.h" + #include "avcodec.h" #include "bytestream.h" #include "internal.h" @@ -608,6 +610,22 @@ static int decode_frame(AVCodecContext *avctx, bytestream2_skip(&s->gb, 4); /* crc */ } break; + case MKTAG('s', 'T', 'E', 'R'): { + int mode = bytestream2_get_byte(&s->gb); + AVStereo3D *stereo3d = av_stereo3d_create_side_data(p); + if (!stereo3d) + goto the_end; + + if (mode == 0 || mode == 1) { + stereo3d->type = AV_STEREO3D_SIDEBYSIDE; + stereo3d->flags = mode ? 0 : AV_STEREO3D_FLAG_INVERT; + } else { + av_log(avctx, AV_LOG_WARNING, + "Unknown value in sTER chunk (%d)\n", mode); + } + bytestream2_skip(&s->gb, 4); /* crc */ + break; + } case MKTAG('I', 'E', 'N', 'D'): if (!(s->state & PNG_ALLIMAGE)) goto fail; |