[FFmpeg-cvslog] movenc: Add support for writing st3d and sv3d boxes.
Aaron Colwell
git at videolan.org
Tue Mar 28 01:11:14 EEST 2017
ffmpeg | branch: master | Aaron Colwell <acolwell at google.com> | Mon Mar 27 08:00:12 2017 -0700| [b4189590a59159317f6316106e2f061e5c6df556] | committer: James Almer
movenc: Add support for writing st3d and sv3d boxes.
Signed-off-by: James Almer <jamrial at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b4189590a59159317f6316106e2f061e5c6df556
---
libavformat/movenc.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 99 insertions(+)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 3b4e3b5..112471d 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -46,6 +46,7 @@
#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavutil/pixdesc.h"
+#include "libavutil/stereo3d.h"
#include "libavutil/timecode.h"
#include "libavutil/color_utils.h"
#include "hevc.h"
@@ -1603,6 +1604,94 @@ static int mov_write_subtitle_tag(AVIOContext *pb, MOVTrack *track)
return update_size(pb, pos);
}
+static int mov_write_st3d_tag(AVIOContext *pb, AVStereo3D *stereo_3d)
+{
+ int8_t stereo_mode;
+
+ if (stereo_3d->flags != 0) {
+ av_log(pb, AV_LOG_WARNING, "Unsupported stereo_3d flags %x. st3d not written.\n", stereo_3d->flags);
+ return 0;
+ }
+
+ switch (stereo_3d->type) {
+ case AV_STEREO3D_2D:
+ stereo_mode = 0;
+ break;
+ case AV_STEREO3D_TOPBOTTOM:
+ stereo_mode = 1;
+ break;
+ case AV_STEREO3D_SIDEBYSIDE:
+ stereo_mode = 2;
+ break;
+ default:
+ av_log(pb, AV_LOG_WARNING, "Unsupported stereo_3d type %s. st3d not written.\n", av_stereo3d_type_name(stereo_3d->type));
+ return 0;
+ }
+ avio_wb32(pb, 13); /* size */
+ ffio_wfourcc(pb, "st3d");
+ avio_wb32(pb, 0); /* version = 0 & flags = 0 */
+ avio_w8(pb, stereo_mode);
+ return 13;
+}
+
+static int mov_write_sv3d_tag(AVFormatContext *s, AVIOContext *pb, AVSphericalMapping *spherical_mapping)
+{
+ int64_t sv3d_pos, svhd_pos, proj_pos;
+ const char* metadata_source = s->flags & AVFMT_FLAG_BITEXACT ? "Lavf" : LIBAVFORMAT_IDENT;
+
+ if (spherical_mapping->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
+ spherical_mapping->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
+ spherical_mapping->projection != AV_SPHERICAL_CUBEMAP) {
+ av_log(pb, AV_LOG_WARNING, "Unsupported projection %d. sv3d not written.\n", spherical_mapping->projection);
+ return 0;
+ }
+
+ sv3d_pos = avio_tell(pb);
+ avio_wb32(pb, 0); /* size */
+ ffio_wfourcc(pb, "sv3d");
+
+ svhd_pos = avio_tell(pb);
+ avio_wb32(pb, 0); /* size */
+ ffio_wfourcc(pb, "svhd");
+ avio_wb32(pb, 0); /* version = 0 & flags = 0 */
+ avio_put_str(pb, metadata_source);
+ update_size(pb, svhd_pos);
+
+ proj_pos = avio_tell(pb);
+ avio_wb32(pb, 0); /* size */
+ ffio_wfourcc(pb, "proj");
+
+ avio_wb32(pb, 24); /* size */
+ ffio_wfourcc(pb, "prhd");
+ avio_wb32(pb, 0); /* version = 0 & flags = 0 */
+ avio_wb32(pb, spherical_mapping->yaw);
+ avio_wb32(pb, spherical_mapping->pitch);
+ avio_wb32(pb, spherical_mapping->roll);
+
+ switch (spherical_mapping->projection) {
+ case AV_SPHERICAL_EQUIRECTANGULAR:
+ case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
+ avio_wb32(pb, 28); /* size */
+ ffio_wfourcc(pb, "equi");
+ avio_wb32(pb, 0); /* version = 0 & flags = 0 */
+ avio_wb32(pb, spherical_mapping->bound_top);
+ avio_wb32(pb, spherical_mapping->bound_bottom);
+ avio_wb32(pb, spherical_mapping->bound_left);
+ avio_wb32(pb, spherical_mapping->bound_right);
+ break;
+ case AV_SPHERICAL_CUBEMAP:
+ avio_wb32(pb, 20); /* size */
+ ffio_wfourcc(pb, "cbmp");
+ avio_wb32(pb, 0); /* version = 0 & flags = 0 */
+ avio_wb32(pb, 0); /* layout */
+ avio_wb32(pb, spherical_mapping->padding); /* padding */
+ break;
+ }
+ update_size(pb, proj_pos);
+
+ return update_size(pb, sv3d_pos);
+}
+
static int mov_write_pasp_tag(AVIOContext *pb, MOVTrack *track)
{
AVRational sar;
@@ -1873,6 +1962,16 @@ static int mov_write_video_tag(AVIOContext *pb, MOVMuxContext *mov, MOVTrack *tr
av_log(mov->fc, AV_LOG_WARNING, "Not writing 'colr' atom. Format is not MOV or MP4.\n");
}
+ if (mov->fc->strict_std_compliance <= FF_COMPLIANCE_EXPERIMENTAL) {
+ AVStereo3D* stereo_3d = (AVStereo3D*) av_stream_get_side_data(track->st, AV_PKT_DATA_STEREO3D, NULL);
+ AVSphericalMapping* spherical_mapping = (AVSphericalMapping*)av_stream_get_side_data(track->st, AV_PKT_DATA_SPHERICAL, NULL);
+
+ if (stereo_3d)
+ mov_write_st3d_tag(pb, stereo_3d);
+ if (spherical_mapping)
+ mov_write_sv3d_tag(mov->fc, pb, spherical_mapping);
+ }
+
if (track->par->sample_aspect_ratio.den && track->par->sample_aspect_ratio.num) {
mov_write_pasp_tag(pb, track);
}
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