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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 <bgav_dca.h>
#define DCA_HEADER_BYTES 14
typedef struct
{
dts_state_t * state;
} dca_t;
static int parse_frame_dca(bgav_audio_parser_t * parser,
bgav_packet_t * p)
{
int flags, sample_rate, bit_rate, frame_length, frame_bytes;
dca_t * priv = parser->priv;
if(p->data_size < DCA_HEADER_BYTES)
return 0;
frame_bytes = dts_syncinfo(priv->state, p->data,
&flags, &sample_rate, &bit_rate, &frame_length);
if(frame_bytes <= 0)
return 0;
p->duration = frame_length;
if(parser->s->codec_bitrate <= 0)
parser->s->codec_bitrate = bit_rate;
if(parser->s->data.audio.format->channel_locations[0] == GAVL_CHID_NONE)
bgav_dca_flags_2_channel_setup(flags, parser->s->data.audio.format);
// fprintf(stderr, "Parse frame: %d %d\n", p->data_size, frame_bytes);
return 1;
}
static int parse_dca(bgav_audio_parser_t * parser)
{
int i;
int frame_bytes;
int frame_length;
int flags;
int sample_rate;
int bit_rate;
dca_t * priv = parser->priv;
for(i = 0; i < parser->buf.size - DCA_HEADER_BYTES; i++)
{
frame_bytes = dts_syncinfo(priv->state, parser->buf.buffer + i,
&flags, &sample_rate, &bit_rate, &frame_length);
if(frame_bytes)
{
// fprintf(stderr, "Got frame bytes: %d, length: %d\n",
// frame_bytes, frame_length);
if(!parser->have_format)
{
parser->s->data.audio.format->samplerate = sample_rate;
bgav_dca_flags_2_channel_setup(flags, parser->s->data.audio.format);
parser->have_format = 1;
parser->s->codec_bitrate = bit_rate;
return PARSER_HAVE_FORMAT;
}
bgav_audio_parser_set_frame(parser,
i, frame_bytes, frame_length);
return PARSER_HAVE_FRAME;
}
}
return PARSER_NEED_DATA;
}
static void cleanup_dca(bgav_audio_parser_t * parser)
{
dca_t * priv = parser->priv;
if(priv->state)
dts_free(priv->state);
free(priv);
}
void bgav_audio_parser_init_dca(bgav_audio_parser_t * parser)
{
dca_t * priv = calloc(1, sizeof(*priv));
priv->state = dts_init(0);
parser->priv = priv;
parser->parse = parse_dca;
parser->cleanup = cleanup_dca;
parser->parse_frame = parse_frame_dca;
}
void bgav_dca_flags_2_channel_setup(int flags, gavl_audio_format_t * format)
{
switch(flags & DTS_CHANNEL_MASK)
{
case DTS_CHANNEL: // Dual mono. Two independant mono channels.
format->num_channels = 2;
format->channel_locations[0] = GAVL_CHID_FRONT_LEFT;
format->channel_locations[1] = GAVL_CHID_FRONT_RIGHT;
break;
case DTS_MONO: // Mono.
format->num_channels = 1;
format->channel_locations[0] = GAVL_CHID_FRONT_CENTER;
break;
case DTS_STEREO: // Stereo.
case DTS_DOLBY: // Dolby surround compatible stereo.
format->num_channels = 2;
format->channel_locations[0] = GAVL_CHID_FRONT_LEFT;
format->channel_locations[1] = GAVL_CHID_FRONT_RIGHT;
break;
case DTS_3F: // 3 front channels (left, center, right)
format->num_channels = 3;
format->channel_locations[0] = GAVL_CHID_FRONT_CENTER;
format->channel_locations[1] = GAVL_CHID_FRONT_LEFT;
format->channel_locations[2] = GAVL_CHID_FRONT_RIGHT;
break;
case DTS_2F1R: // 2 front, 1 rear surround channel (L, R, S)
format->num_channels = 3;
format->channel_locations[0] = GAVL_CHID_FRONT_LEFT;
format->channel_locations[1] = GAVL_CHID_FRONT_RIGHT;
format->channel_locations[2] = GAVL_CHID_REAR_CENTER;
break;
case DTS_3F1R: // 3 front, 1 rear surround channel (L, C, R, S)
format->num_channels = 4;
format->channel_locations[0] = GAVL_CHID_FRONT_CENTER;
format->channel_locations[1] = GAVL_CHID_FRONT_LEFT;
format->channel_locations[2] = GAVL_CHID_FRONT_RIGHT;
format->channel_locations[3] = GAVL_CHID_REAR_CENTER;
break;
case DTS_2F2R: // 2 front, 2 rear surround channels (L, R, LS, RS)
format->num_channels = 4;
format->channel_locations[0] = GAVL_CHID_FRONT_LEFT;
format->channel_locations[1] = GAVL_CHID_FRONT_RIGHT;
format->channel_locations[2] = GAVL_CHID_REAR_LEFT;
format->channel_locations[3] = GAVL_CHID_REAR_RIGHT;
break;
case DTS_3F2R: // 3 front, 2 rear surround channels (L, C, R, LS, RS)
format->num_channels = 5;
format->channel_locations[0] = GAVL_CHID_FRONT_CENTER;
format->channel_locations[1] = GAVL_CHID_FRONT_LEFT;
format->channel_locations[2] = GAVL_CHID_FRONT_RIGHT;
format->channel_locations[3] = GAVL_CHID_REAR_LEFT;
format->channel_locations[4] = GAVL_CHID_REAR_RIGHT;
break;
}
if(flags & DTS_LFE)
{
format->channel_locations[format->num_channels] =
GAVL_CHID_LFE;
format->num_channels++;
}
}
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