[FFmpeg-cvslog] avcodec/mpeg4videodec: Add support for parsing and exporting video_range
Michael Niedermayer
git at videolan.org
Thu Dec 21 21:25:35 EET 2017
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Dec 10 15:01:43 2017 +0100| [4b2a186ef02c1fbe7f7cae30a2bdfff72bcc75f7] | committer: Michael Niedermayer
avcodec/mpeg4videodec: Add support for parsing and exporting video_range
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4b2a186ef02c1fbe7f7cae30a2bdfff72bcc75f7
---
libavcodec/mpeg4video.h | 3 +++
libavcodec/mpeg4videodec.c | 33 +++++++++++++++++++++++++++++++++
2 files changed, 36 insertions(+)
diff --git a/libavcodec/mpeg4video.h b/libavcodec/mpeg4video.h
index 515b008ae4..0ba502d50b 100644
--- a/libavcodec/mpeg4video.h
+++ b/libavcodec/mpeg4video.h
@@ -43,6 +43,9 @@
#define ACE_VO_TYPE 12
#define ADV_SIMPLE_VO_TYPE 17
+#define VOT_VIDEO_ID 1
+#define VOT_STILL_TEXTURE_ID 2
+
// aspect_ratio_info
#define EXTENDED_PAR 15
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index cdd7077f01..e9cba25dd0 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -1754,6 +1754,37 @@ static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb)
return 0;
}
+static int mpeg4_decode_visual_object(MpegEncContext *s, GetBitContext *gb)
+{
+ int visual_object_type;
+ int is_visual_object_identifier = get_bits1(gb);
+
+ if (is_visual_object_identifier) {
+ skip_bits(gb, 4+3);
+ }
+ visual_object_type = get_bits(gb, 4);
+
+ if (visual_object_type == VOT_VIDEO_ID ||
+ visual_object_type == VOT_STILL_TEXTURE_ID) {
+ int video_signal_type = get_bits1(gb);
+ if (video_signal_type) {
+ int video_format = get_bits(gb, 3);
+ int video_range = get_bits1(gb);
+ int color_description = get_bits1(gb);
+
+ s->avctx->color_range = video_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
+
+ if (color_description) {
+ s->avctx->color_primaries = get_bits(gb, 8);
+ s->avctx->color_trc = get_bits(gb, 8);
+ s->avctx->colorspace = get_bits(gb, 8);
+ }
+ }
+ }
+
+ return 0;
+}
+
static int decode_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb)
{
MpegEncContext *s = &ctx->m;
@@ -2684,6 +2715,8 @@ int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb)
mpeg4_decode_gop_header(s, gb);
} else if (startcode == VOS_STARTCODE) {
mpeg4_decode_profile_level(s, gb);
+ } else if (startcode == VISUAL_OBJ_STARTCODE) {
+ mpeg4_decode_visual_object(s, gb);
} else if (startcode == VOP_STARTCODE) {
break;
}
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