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path: root/libavcodec/hevc_sei.c
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Diffstat (limited to 'libavcodec/hevc_sei.c')
-rw-r--r--libavcodec/hevc_sei.c136
1 files changed, 99 insertions, 37 deletions
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c
index 8b84abfb45..24f27c88b5 100644
--- a/libavcodec/hevc_sei.c
+++ b/libavcodec/hevc_sei.c
@@ -5,39 +5,43 @@
* Copyright (C) 2012 - 2013 Gildas Cocherel
* Copyright (C) 2013 Vittorio Giovara
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "golomb.h"
#include "hevc.h"
+#include "golomb.h"
static void decode_nal_sei_decoded_picture_hash(HEVCContext *s,
int payload_size)
{
int cIdx, i;
- GetBitContext *gb = &s->HEVClc.gb;
- uint8_t hash_type = get_bits(gb, 8);
+ uint8_t hash_type;
+ //uint16_t picture_crc;
+ //uint32_t picture_checksum;
+ GetBitContext *gb = &s->HEVClc->gb;
+ hash_type = get_bits(gb, 8);
- for (cIdx = 0; cIdx < 3; cIdx++) {
+ for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) {
if (hash_type == 0) {
s->is_md5 = 1;
- for (i = 0; i < 16; i++)
+ for (i = 0; i < 16; i++) {
s->md5[cIdx][i] = get_bits(gb, 8);
- } else if (hash_type == 1) {
+ }
+ } else if( hash_type == 1) {
// picture_crc = get_bits(gb, 16);
skip_bits(gb, 16);
} else if (hash_type == 2) {
@@ -47,34 +51,76 @@ 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;
+ GetBitContext *gb = &s->HEVClc->gb;
int cancel, type, quincunx;
- 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
+ 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
// the following skips spatial_flipping_flag frame0_flipped_flag
// field_views_flag current_frame_is_frame0_flag
// frame0_self_contained_flag frame1_self_contained_flag
skip_bits(gb, 6);
- if (quincunx == 0 && type != 5)
- skip_bits(gb, 16); // frame[01]_grid_position_[xy]
- skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
- skip_bits1(gb); // frame_packing_arrangement_persistance_flag
+ if ( quincunx == 0 && type != 5 )
+ skip_bits(gb, 16); // frame[01]_grid_position_[xy]
+ skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
+ skip_bits1(gb); // frame_packing_arrangement_persistance_flag
+ }
+ skip_bits1(gb); // upsampled_aspect_ratio_flag
+}
+
+static int decode_pic_timing(HEVCContext *s)
+{
+ GetBitContext *gb = &s->HEVClc->gb;
+ HEVCSPS *sps = (HEVCSPS*)s->sps_list[s->active_seq_parameter_set_id]->data;
+
+ if (!sps)
+ return(AVERROR(ENOMEM));
+
+ if (sps->vui.frame_field_info_present_flag) {
+ int pic_struct = get_bits(gb, 4);
+ s->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
+ if (pic_struct == 2) {
+ av_log(s->avctx, AV_LOG_DEBUG, "BOTTOM Field\n");
+ s->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
+ } else if (pic_struct == 1) {
+ av_log(s->avctx, AV_LOG_DEBUG, "TOP Field\n");
+ s->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
+ }
+ get_bits(gb, 2); // source_scan_type
+ get_bits(gb, 1); // duplicate_flag
}
- skip_bits1(gb); // upsampled_aspect_ratio_flag
+ return 1;
+}
+
+static void active_parameter_sets(HEVCContext *s)
+{
+ GetBitContext *gb = &s->HEVClc->gb;
+ int num_sps_ids_minus1;
+ int i;
+
+ get_bits(gb, 4); // active_video_parameter_set_id
+ get_bits(gb, 1); // self_contained_cvs_flag
+ get_bits(gb, 1); // num_sps_ids_minus1
+ num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1
+
+ s->active_seq_parameter_set_id = get_ue_golomb_long(gb);
+
+ for (i = 1; i <= num_sps_ids_minus1; i++)
+ get_ue_golomb_long(gb); // active_seq_parameter_set_id[i]
}
static int decode_nal_sei_message(HEVCContext *s)
{
- GetBitContext *gb = &s->HEVClc.gb;
+ GetBitContext *gb = &s->HEVClc->gb;
int payload_type = 0;
int payload_size = 0;
@@ -82,32 +128,44 @@ static int decode_nal_sei_message(HEVCContext *s)
av_log(s->avctx, AV_LOG_DEBUG, "Decoding SEI\n");
while (byte == 0xFF) {
- byte = get_bits(gb, 8);
+ byte = get_bits(gb, 8);
payload_type += byte;
}
byte = 0xFF;
while (byte == 0xFF) {
- byte = get_bits(gb, 8);
+ byte = get_bits(gb, 8);
payload_size += byte;
}
if (s->nal_unit_type == NAL_SEI_PREFIX) {
- if (payload_type == 256)
+ if (payload_type == 256 /*&& s->decode_checksum_sei*/) {
decode_nal_sei_decoded_picture_hash(s, payload_size);
- else if (payload_type == 45)
- decode_nal_sei_frame_packing_arrangement(&s->HEVClc);
- else {
+ return 1;
+ } else if (payload_type == 45) {
+ decode_nal_sei_frame_packing_arrangement(s);
+ return 1;
+ } else if (payload_type == 1){
+ int ret = decode_pic_timing(s);
+ av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
+ skip_bits(gb, 8*payload_size);
+ return ret;
+ } else if (payload_type == 129){
+ active_parameter_sets(s);
av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
- skip_bits(gb, 8 * payload_size);
+ return 1;
+ } else {
+ av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
+ skip_bits(gb, 8*payload_size);
+ return 1;
}
} else { /* nal_unit_type == NAL_SEI_SUFFIX */
- if (payload_type == 132)
+ if (payload_type == 132 /* && s->decode_checksum_sei */)
decode_nal_sei_decoded_picture_hash(s, payload_size);
else {
av_log(s->avctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", payload_type);
- skip_bits(gb, 8 * payload_size);
+ skip_bits(gb, 8*payload_size);
}
+ return 1;
}
- return 0;
}
static int more_rbsp_data(GetBitContext *gb)
@@ -117,8 +175,12 @@ static int more_rbsp_data(GetBitContext *gb)
int ff_hevc_decode_nal_sei(HEVCContext *s)
{
+ int ret;
+
do {
- decode_nal_sei_message(s);
- } while (more_rbsp_data(&s->HEVClc.gb));
- return 0;
+ ret = decode_nal_sei_message(s);
+ if (ret < 0)
+ return(AVERROR(ENOMEM));
+ } while (more_rbsp_data(&s->HEVClc->gb));
+ return 1;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-18 12:10:57 +0300