[FFmpeg-cvslog] hevc: parse display orientation SEI message
Vittorio Giovara
git at videolan.org
Thu Jul 10 00:25:26 CEST 2014
ffmpeg | branch: master | Vittorio Giovara <vittorio.giovara at gmail.com> | Wed Jul 2 12:02:15 2014 -0400| [0569a7e0bd2006d9a5248d17a1f4bf3ca654ae50] | committer: Vittorio Giovara
hevc: parse display orientation SEI message
Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0569a7e0bd2006d9a5248d17a1f4bf3ca654ae50
---
libavcodec/hevc.c | 15 +++++++++++++++
libavcodec/hevc.h | 5 +++++
libavcodec/hevc_sei.c | 17 +++++++++++++++++
3 files changed, 37 insertions(+)
diff --git a/libavcodec/hevc.c b/libavcodec/hevc.c
index 9ba136d..13f989b 100644
--- a/libavcodec/hevc.c
+++ b/libavcodec/hevc.c
@@ -25,6 +25,7 @@
#include "libavutil/attributes.h"
#include "libavutil/common.h"
+#include "libavutil/display.h"
#include "libavutil/internal.h"
#include "libavutil/md5.h"
#include "libavutil/opt.h"
@@ -2457,6 +2458,20 @@ static int set_side_data(HEVCContext *s)
stereo->flags = AV_STEREO3D_FLAG_INVERT;
}
+ if (s->sei_display_orientation_present &&
+ (s->sei_anticlockwise_rotation || s->sei_hflip || s->sei_vflip)) {
+ double angle = s->sei_anticlockwise_rotation * 360 / (double) (1 << 16);
+ AVFrameSideData *rotation = av_frame_new_side_data(out,
+ AV_FRAME_DATA_DISPLAYMATRIX,
+ sizeof(int32_t) * 9);
+ if (!rotation)
+ return AVERROR(ENOMEM);
+
+ av_display_rotation_set((int32_t *)rotation->data, angle);
+ av_display_matrix_flip((int32_t *)rotation->data,
+ s->sei_vflip, s->sei_hflip);
+ }
+
return 0;
}
diff --git a/libavcodec/hevc.h b/libavcodec/hevc.h
index 4b8bcf8..978681b 100644
--- a/libavcodec/hevc.h
+++ b/libavcodec/hevc.h
@@ -859,6 +859,11 @@ typedef struct HEVCContext {
int frame_packing_arrangement_type;
int content_interpretation_type;
int quincunx_subsampling;
+
+ /** display orientation */
+ int sei_display_orientation_present;
+ int sei_anticlockwise_rotation;
+ int sei_hflip, sei_vflip;
} HEVCContext;
int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps,
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c
index b011596..978a0e3 100644
--- a/libavcodec/hevc_sei.c
+++ b/libavcodec/hevc_sei.c
@@ -71,6 +71,21 @@ static void decode_nal_sei_frame_packing_arrangement(HEVCContext *s)
skip_bits1(gb); // upsampled_aspect_ratio_flag
}
+static void decode_nal_sei_display_orientation(HEVCContext *s)
+{
+ GetBitContext *gb = &s->HEVClc.gb;
+
+ s->sei_display_orientation_present = !get_bits1(gb);
+
+ if (s->sei_display_orientation_present) {
+ s->sei_hflip = get_bits1(gb); // hor_flip
+ s->sei_vflip = get_bits1(gb); // ver_flip
+
+ s->sei_anticlockwise_rotation = get_bits(gb, 16);
+ skip_bits1(gb); // display_orientation_persistence_flag
+ }
+}
+
static int decode_nal_sei_message(HEVCContext *s)
{
GetBitContext *gb = &s->HEVClc.gb;
@@ -94,6 +109,8 @@ static int decode_nal_sei_message(HEVCContext *s)
decode_nal_sei_decoded_picture_hash(s);
else if (payload_type == 45)
decode_nal_sei_frame_packing_arrangement(s);
+ else if (payload_type == 47)
+ decode_nal_sei_display_orientation(s);
else {
av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
skip_bits(gb, 8 * payload_size);
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