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/*****************************************************************
* gmerlin-avdecoder - a general purpose multimedia decoding library
*
* Copyright (c) 2001 - 2012 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#include <string.h>
#include <avdec_private.h>
#include <parser.h>
#include <videoparser_priv.h>
#include <bitstream.h>
static int parse_frame_vp9(bgav_video_parser_t * parser,
bgav_packet_t * p,
int64_t pts_orig)
{
int val;
bgav_bitstream_t b;
int show_frame;
int show_existing_frame;
int frame_type;
int profile;
int profile_high_bit;
int profile_low_bit;
memset(&b, 0, sizeof(b));
bgav_bitstream_init(&b, p->data, p->data_size);
// frame_marker shall be equal to 2
if(!bgav_bitstream_get(&b, &val, 2) ||
(val != 2))
{
return 0;
}
if(!bgav_bitstream_get(&b, &profile_low_bit, 1) ||
!bgav_bitstream_get(&b, &profile_high_bit, 1))
{
return 0;
}
profile = (profile_high_bit << 1) | profile_low_bit;
if(profile == 3)
{
/* reserved_zero */
if(!bgav_bitstream_get(&b, &val, 1) || (val != 0))
return 0;
}
/* Show existing frame */
if(!bgav_bitstream_get(&b, &show_existing_frame, 1))
return 0;
if(show_existing_frame)
{
PACKET_SET_CODING_TYPE(p, BGAV_CODING_TYPE_P);
return 1;
}
if(!bgav_bitstream_get(&b, &frame_type, 1) ||
!bgav_bitstream_get(&b, &show_frame, 1))
return 0;
// fprintf(stderr, "frame type: %d, show_frame: %d\n",
// frame_type, show_frame);
if(!show_frame)
p->flags |= GAVL_PACKET_NOOUTPUT;
else
{
if(!frame_type)
PACKET_SET_CODING_TYPE(p, BGAV_CODING_TYPE_I);
else
PACKET_SET_CODING_TYPE(p, BGAV_CODING_TYPE_P);
}
/*
if(!(p->data[0] & 0x10))
p->flags |= GAVL_PACKET_NOOUTPUT;
else if(PACKET_GET_KEYFRAME(p))
PACKET_SET_CODING_TYPE(p, BGAV_CODING_TYPE_I);
else
PACKET_SET_CODING_TYPE(p, BGAV_CODING_TYPE_P);
*/
return 1;
}
void bgav_video_parser_init_vp9(bgav_video_parser_t * parser)
{
parser->parse_frame = parse_frame_vp9;
}
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