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hevc: parse display orientation SEI message

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Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
This commit is contained in:
Vittorio Giovara 2014-07-02 12:02:15 -04:00
parent 18e3d61e9e
commit 0569a7e0bd
3 changed files with 37 additions and 0 deletions
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15
libavcodec/hevc.c
View File

@ -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;
}

5
libavcodec/hevc.h
View File

@ -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,

17
libavcodec/hevc_sei.c
View File

@ -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);