On Wed, Aug 31, 2016 at 02:35:48PM +0300, Erkki Seppälä wrote:
> Instead of one track reference, allow many, and instead of
> of track reference type (ie. 'cdsc'), allow many.
>
> In addition this patch allows client to explicitly add track references
> with side packet AV_PKT_DATA_TRACK_REFERENCES containing
> AVTrackReferences (which of there can many many).
>
> Internally MOVTrack's track references can be manipulated with helper
> functions ff_mov_tref* (and is used by a later patch for reading
> MOVTRefs).
>
> Multiple track references can be useful in particular with timed meta
> data tracks, indicating the track is related to multiple other tracks.
>
> This information ends up in ISO media file box 'tref' as specified by
> ISO/IEC 14496-12.
>
> Signed-off-by: Erkki Seppälä <erkki.seppala....@nokia.com>
> Signed-off-by: OZOPlayer <oz...@nokia.com>
> ---
> libavcodec/avcodec.h | 19 +++++++-
> libavformat/Makefile | 4 +-
> libavformat/movenc.c | 127
> +++++++++++++++++++++++++++++++++++++++++---------
> libavformat/movenc.h | 5 +-
> libavformat/movtref.c | 115 +++++++++++++++++++++++++++++++++++++++++++++
> libavformat/movtref.h | 75 +++++++++++++++++++++++++++++
> 6 files changed, 318 insertions(+), 27 deletions(-)
> create mode 100644 libavformat/movtref.c
> create mode 100644 libavformat/movtref.h
>
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index 0d0447e6..f45cdc2 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -1348,6 +1348,15 @@ typedef struct AVCPBProperties {
> * Types and functions for working with AVPacket.
> * @{
> */
> +
> +typedef struct AVTrackReferences {
> + int next_tref_ofs; /** offset in bytes to the next
> AVTrackReferences or 0 if this is the last one*/
> + char tag[4]; /** 4cc used for describing this */
> + int nb_tracks; /** number of tracks */> + int tracks[1]; /** tracks this track refers to (contains > nb_tracks entries) */ This syntax looks wrong to document the previous field /**< would be used [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Avoid a single point of failure, be that a person or equipment.
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