---
Kudos to x262 project for supporting encoding with frame packing.
libavcodec/mpeg12dec.c | 73 ++++++++++++++++++++++++++++++++++++++++--------
1 file changed, 62 insertions(+), 11 deletions(-)
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 0e11dda..b99fbe6 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -27,6 +27,7 @@
#include "libavutil/attributes.h"
#include "libavutil/internal.h"
+#include "libavutil/stereo3d.h"
#include "internal.h"
#include "avcodec.h"
#include "dsputil.h"
@@ -2044,18 +2045,68 @@ static void mpeg_decode_user_data(AVCodecContext *avctx,
const uint8_t *buf_end = p + buf_size;
/* we parse the DTG active format information */
- if (buf_end - p >= 5 &&
- p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
- int flags = p[4];
- p += 5;
- if (flags & 0x80) {
- /* skip event id */
- p += 2;
- }
- if (flags & 0x40) {
- if (buf_end - p < 1)
+ if (buf_end - p >= 5) {
+ if (p[0] == 'D' &&
+ p[1] == 'T' &&
+ p[2] == 'G' &&
+ p[3] == '1') {
+ int flags = p[4];
+ p += 5;
+ if (flags & 0x80) {
+ /* skip event id */
+ p += 2;
+ }
+ if (flags & 0x40) {
+ if (buf_end - p < 1)
+ return;
+ avctx->dtg_active_format = p[0] & 0x0f;
+ }
+ } else if (p[0] == 'J' &&
+ p[1] == 'P' &&
+ p[2] == '3' &&
+ p[3] == 'D') {
+ AVFrameSideData *side_data;
+ Mpeg1Context *s1 = avctx->priv_data;
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+ AVStereo3D *stereo = av_stereo3d_alloc();
+ if (!stereo)
return;
- avctx->dtg_active_format = p[0] & 0x0f;
+
+ if (p[4] == 0x03) { // S3D_video_format_length
+ // the mask ignores reserved_bit
+ const uint8_t S3D_video_format_type = p[5] & 0x7F;
+
+ switch (S3D_video_format_type) {
+ case 0x03:
+ stereo->type = AV_STEREO3D_SIDEBYSIDE;
+ break;
+ case 0x04:
+ stereo->type = AV_STEREO3D_TOPBOTTOM;
+ break;
+ case 0x08:
+ stereo->type = AV_STEREO3D_2D;
+ break;
+ case 0x23:
+ stereo->type = AV_STEREO3D_SIDEBYSIDE;
+ stereo->info = AV_STEREO3D_SAMPLE_QUINCUNX;
+ break;
+ default:
+ stereo->type = AV_STEREO3D_UNKNOWN;
+ break;
+ }
+
+ if (s->current_picture_ptr &&
+ stereo->type != AV_STEREO3D_UNKNOWN) {
+ side_data =
av_frame_new_side_data(&s->current_picture_ptr->f,
+ AV_FRAME_DATA_STEREO3D,
+ sizeof(AVStereo3D));
+ if (!side_data)
+ return;
+
+ memcpy(side_data->data, stereo, sizeof(AVStereo3D));
+ }
+ }
+ av_stereo3d_free(&stereo);
}
}
}
--
1.7.9.5
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
