+static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
+ AVStream *st)
+{
+ AVIOContext b;
+ AVIOContext *dyn_cp;
+ int side_data_size = 0;
+ int ret, projection_size;
+ uint8_t *projection_ptr;
+ uint8_t private[20];
+
+ const AVSphericalMapping *spherical =
+ (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
+ &side_data_size);
+
+ if (!side_data_size)
+ return 0;
+
+ ret = avio_open_dyn_buf(&dyn_cp);
+ if (ret < 0)
+ return ret;
+
+ switch (spherical->projection) {
+ case AV_SPHERICAL_EQUIRECTANGULAR:
+ put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
+ MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
+ break;
+ case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
+ ffio_init_context(&b, private, 20, 1, NULL, NULL, NULL, NULL);
+ put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
+ MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
+ avio_wb32(&b, 0); // version + flags
+ avio_wb32(&b, spherical->bound_top);
+ avio_wb32(&b, spherical->bound_bottom);
+ avio_wb32(&b, spherical->bound_left);
+ avio_wb32(&b, spherical->bound_right);
+ put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
+ private, avio_tell(&b));
+ break;
+ case AV_SPHERICAL_CUBEMAP:
+ ffio_init_context(&b, private, 12, 1, NULL, NULL, NULL, NULL);
+ put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
+ MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
+ avio_wb32(&b, 0); // version + flags
+ avio_wb32(&b, 0); // layout
+ avio_wb32(&b, spherical->padding);
+ put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
+ private, avio_tell(&b));
+ break;
+ default:
+ av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
+ goto end;
+ }
+
+ if (spherical->yaw)
+ put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
+ (double) spherical->yaw / (1 << 16));
+ if (spherical->pitch)
+ put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
+ (double) spherical->pitch / (1 << 16));
+ if (spherical->roll)
+ put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
+ (double) spherical->roll / (1 << 16));
+
+end:
+ projection_size = avio_close_dyn_buf(dyn_cp, &projection_ptr);
+ if (projection_size) {
+ ebml_master projection = start_ebml_master(pb,
+ MATROSKA_ID_VIDEOPROJECTION,
+ projection_size);
+ avio_write(pb, projection_ptr, projection_size);
+ end_ebml_master(pb, projection);
+ }
+ av_freep(&projection_ptr);
+
+ return 0;
+}
+
+static void mkv_write_field_order(AVIOContext *pb,
+ enum AVFieldOrder field_order)
+{
+ switch (field_order) {
+ case AV_FIELD_UNKNOWN:
+ put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
+ MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED);
+ break;
+ case AV_FIELD_PROGRESSIVE:
+ put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
+ MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
+ break;
+ case AV_FIELD_TT:
+ case AV_FIELD_BB:
+ case AV_FIELD_TB:
+ case AV_FIELD_BT:
+ put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
+ MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
+ switch (field_order) {
+ case AV_FIELD_TT:
+ put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
+ MATROSKA_VIDEO_FIELDORDER_TT);
+ break;
+ case AV_FIELD_BB:
+ put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
+ MATROSKA_VIDEO_FIELDORDER_BB);
+ break;
+ case AV_FIELD_TB:
+ put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
+ MATROSKA_VIDEO_FIELDORDER_TB);
+ break;
+ case AV_FIELD_BT:
+ put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
+ MATROSKA_VIDEO_FIELDORDER_BT);
+ break;
+ }
+ }
+}
+