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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 <stdlib.h>
#include <string.h>
#include <config.h>
#include <avdec_private.h>
#include <parser.h>
#include <audioparser_priv.h>
#include <vorbis/codec.h>
#define LOG_DOMAIN "parse_vorbis"
typedef struct
{
vorbis_info vi;
vorbis_comment vc;
long last_blocksize;
} vorbis_priv_t;
static int parse_frame_vorbis(bgav_audio_parser_t * parser, bgav_packet_t * p)
{
ogg_packet op;
long blocksize;
vorbis_priv_t * priv = parser->priv;
memset(&op, 0, sizeof(op));
op.bytes = p->data_size;
op.packet = p->data;
blocksize = vorbis_packet_blocksize(&priv->vi, &op);
if(priv->last_blocksize)
p->duration = (priv->last_blocksize + blocksize) / 4;
else
p->duration = 0;
// fprintf(stderr, "Parse vorbis: %"PRId64"\n", p->duration);
priv->last_blocksize = blocksize;
return 1;
}
static void cleanup_vorbis(bgav_audio_parser_t * parser)
{
vorbis_priv_t * priv = parser->priv;
vorbis_comment_clear(&priv->vc);
vorbis_info_clear(&priv->vi);
free(priv);
}
static void reset_vorbis(bgav_audio_parser_t * parser)
{
vorbis_priv_t * priv = parser->priv;
priv->last_blocksize = 0;
}
void bgav_audio_parser_init_vorbis(bgav_audio_parser_t * parser)
{
vorbis_priv_t * priv;
ogg_packet op;
int i;
int len;
priv = calloc(1, sizeof(*priv));
parser->priv = priv;
/* Get extradata and initialize codec */
vorbis_info_init(&priv->vi);
vorbis_comment_init(&priv->vc);
memset(&op, 0, sizeof(op));
if(!parser->s->ci.global_header)
{
gavl_log(GAVL_LOG_ERROR, LOG_DOMAIN, "No extradata found");
return;
}
op.b_o_s = 1;
for(i = 0; i < 3; i++)
{
op.packet =
gavl_extract_xiph_header(parser->s->ci.global_header, parser->s->ci.global_header_len,
i, &len);
if(!op.packet)
{
gavl_log(GAVL_LOG_ERROR, LOG_DOMAIN,
"Truncated vorbis header %d", i+1);
return;
}
if(i)
op.b_o_s = 0;
op.bytes = len;
if(vorbis_synthesis_headerin(&priv->vi, &priv->vc,
&op) < 0)
{
gavl_log(GAVL_LOG_ERROR, LOG_DOMAIN,
"Packet %d is not a vorbis header", i+1);
return;
}
op.packetno++;
}
parser->parse_frame = parse_frame_vorbis;
parser->cleanup = cleanup_vorbis;
parser->reset = reset_vorbis;
}
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