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hevc: parse frame packing arrangement SEI messages and save relevant stereo3d information

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This commit is contained in:
Vittorio Giovara 2013-11-10 23:23:57 +01:00
parent 3d1d175367
commit acb77dff6a
3 changed files with 56 additions and 5 deletions
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40
libavcodec/hevc.c
View File

@ -29,6 +29,7 @@
#include "libavutil/md5.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/stereo3d.h"
#include "bytestream.h"
#include "cabac_functions.h"
@ -2347,6 +2348,41 @@ static void restore_tqb_pixels(HEVCContext *s)
}
}
static int set_side_data(HEVCContext *s)
{
AVFrame *out = s->ref->frame;
if (s->sei_frame_packing_present &&
s->frame_packing_arrangement_type >= 3 &&
s->frame_packing_arrangement_type <= 5 &&
s->content_interpretation_type > 0 &&
s->content_interpretation_type < 3) {
AVStereo3D *stereo = av_stereo3d_create_side_data(out);
if (!stereo)
return AVERROR(ENOMEM);
switch (s->frame_packing_arrangement_type) {
case 3:
if (s->quincunx_subsampling)
stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
else
stereo->type = AV_STEREO3D_SIDEBYSIDE;
break;
case 4:
stereo->type = AV_STEREO3D_TOPBOTTOM;
break;
case 5:
stereo->type = AV_STEREO3D_FRAMESEQUENCE;
break;
}
if (s->content_interpretation_type == 2)
stereo->flags = AV_STEREO3D_FLAG_INVERT;
}
return 0;
}
static int hevc_frame_start(HEVCContext *s)
{
HEVCLocalContext *lc = &s->HEVClc;
@ -2381,6 +2417,10 @@ static int hevc_frame_start(HEVCContext *s)
goto fail;
}
ret = set_side_data(s);
if (ret < 0)
goto fail;
av_frame_unref(s->output_frame);
ret = ff_hevc_output_frame(s, s->output_frame, 0);
if (ret < 0)

6
libavcodec/hevc.h
View File

@ -920,6 +920,12 @@ typedef struct HEVCContext {
int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
int nuh_layer_id;
/** frame packing arrangement variables */
int sei_frame_packing_present;
int frame_packing_arrangement_type;
int content_interpretation_type;
int quincunx_subsampling;
} HEVCContext;
int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps,

15
libavcodec/hevc_sei.c
View File

@ -46,17 +46,17 @@ static void decode_nal_sei_decoded_picture_hash(HEVCContext *s)
}
}
static void decode_nal_sei_frame_packing_arrangement(HEVCLocalContext *lc)
static void decode_nal_sei_frame_packing_arrangement(HEVCContext *s)
{
GetBitContext *gb = &lc->gb;
int cancel, type, quincunx;
GetBitContext *gb = &s->HEVClc.gb;
int cancel, type, quincunx, content;
get_ue_golomb(gb); // frame_packing_arrangement_id
cancel = get_bits1(gb); // frame_packing_cancel_flag
if (cancel == 0) {
type = get_bits(gb, 7); // frame_packing_arrangement_type
quincunx = get_bits1(gb); // quincunx_sampling_flag
skip_bits(gb, 6); // content_interpretation_type
content = get_bits(gb, 6); // content_interpretation_type
// the following skips spatial_flipping_flag frame0_flipped_flag
// field_views_flag current_frame_is_frame0_flag
@ -69,6 +69,11 @@ static void decode_nal_sei_frame_packing_arrangement(HEVCLocalContext *lc)
skip_bits1(gb); // frame_packing_arrangement_persistance_flag
}
skip_bits1(gb); // upsampled_aspect_ratio_flag
s->sei_frame_packing_present = (cancel == 0);
s->frame_packing_arrangement_type = type;
s->content_interpretation_type = content;
s->quincunx_subsampling = quincunx;
}
static int decode_nal_sei_message(HEVCContext *s)
@ -93,7 +98,7 @@ static int decode_nal_sei_message(HEVCContext *s)
if (payload_type == 256)
decode_nal_sei_decoded_picture_hash(s);
else if (payload_type == 45)
decode_nal_sei_frame_packing_arrangement(&s->HEVClc);
decode_nal_sei_frame_packing_arrangement(s);
else {
av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
skip_bits(gb, 8 * payload_size);