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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 <aac_frame.h>
#include <stdlib.h>
#define LOG_DOMAIN "aac_frame"
#ifdef HAVE_NEAACDEC_H
#include <neaacdec.h>
// #define DUMP_DECODE
/*
* Backwards compatibility names (currently in neaacdec.h,
* but might be removed in future versions)
*/
#ifndef faacDecHandle
/* structs */
#define faacDecHandle NeAACDecHandle
#define faacDecConfiguration NeAACDecConfiguration
#define faacDecConfigurationPtr NeAACDecConfigurationPtr
#define faacDecFrameInfo NeAACDecFrameInfo
/* functions */
#define faacDecGetErrorMessage NeAACDecGetErrorMessage
#define faacDecSetConfiguration NeAACDecSetConfiguration
#define faacDecGetCurrentConfiguration NeAACDecGetCurrentConfiguration
#define faacDecInit NeAACDecInit
#define faacDecInit2 NeAACDecInit2
#define faacDecInitDRM NeAACDecInitDRM
#define faacDecPostSeekReset NeAACDecPostSeekReset
#define faacDecOpen NeAACDecOpen
#define faacDecClose NeAACDecClose
#define faacDecDecode NeAACDecDecode
#define AudioSpecificConfig NeAACDecAudioSpecificConfig
#endif
#else
#include <faad.h>
#endif
struct bgav_aac_frame_s
{
faacDecHandle dec;
unsigned long samplerate;
unsigned char channels;
const bgav_options_t * opt;
faacDecFrameInfo frame_info;
};
bgav_aac_frame_t * bgav_aac_frame_create(const bgav_options_t * opt,
uint8_t * header, int header_len)
{
bgav_aac_frame_t * ret;
ret = calloc(1, sizeof(*ret));
if(header)
{
ret->dec = faacDecOpen();
faacDecInit2(ret->dec, header,
header_len,
&ret->samplerate, &ret->channels);
}
ret->opt = opt;
return ret;
}
void bgav_aac_frame_destroy(bgav_aac_frame_t * f)
{
if(f->dec)
faacDecClose(f->dec);
free(f);
}
int bgav_aac_frame_parse(bgav_aac_frame_t * f,
uint8_t * data, int data_len,
int * bytes_used, int * samples)
{
float * frame;
if(!f->dec)
{
f->dec = faacDecOpen();
faacDecInit(f->dec, data,
data_len,
&f->samplerate, &f->channels);
}
#ifdef DUMP_DECODE
bgav_dprintf("faacDecDecode %d bytes\n", data_len);
gavl_hexdump(data, (data_len > 16) ? 16 : data_len, 16);
#endif
memset(&f->frame_info, 0, sizeof(f->frame_info));
frame = faacDecDecode(f->dec, &f->frame_info, data, data_len);
if(!frame)
{
if(f->frame_info.error == 14) /* Too little data */
return 0;
else
{
gavl_log(GAVL_LOG_ERROR, LOG_DOMAIN,
"faacDecDecode failed %s",
faacDecGetErrorMessage(f->frame_info.error));
return -1;
}
}
if(bytes_used)
*bytes_used = f->frame_info.bytesconsumed;
if(samples)
*samples = f->frame_info.samples / f->channels;
// fprintf(stderr, "AAC frame: %d %d\n",
// *bytes_used, *samples);
return 1;
}
void bgav_aac_frame_get_audio_format(bgav_aac_frame_t * frame,
gavl_audio_format_t * format)
{
format->samplerate = frame->samplerate;
format->num_channels = frame->channels;
bgav_faad_set_channel_setup(&frame->frame_info,
format);
format->samples_per_frame = frame->frame_info.samples / frame->channels;
}
static const struct
{
int faad_channel;
gavl_channel_id_t gavl_channel;
}
channels[] =
{
{ FRONT_CHANNEL_CENTER, GAVL_CHID_FRONT_CENTER },
{ FRONT_CHANNEL_LEFT, GAVL_CHID_FRONT_LEFT },
{ FRONT_CHANNEL_RIGHT, GAVL_CHID_FRONT_RIGHT },
{ SIDE_CHANNEL_LEFT, GAVL_CHID_SIDE_LEFT },
{ SIDE_CHANNEL_RIGHT, GAVL_CHID_SIDE_RIGHT },
{ BACK_CHANNEL_LEFT, GAVL_CHID_REAR_LEFT },
{ BACK_CHANNEL_RIGHT, GAVL_CHID_REAR_RIGHT },
{ BACK_CHANNEL_CENTER, GAVL_CHID_REAR_CENTER },
{ LFE_CHANNEL, GAVL_CHID_LFE },
{ UNKNOWN_CHANNEL, GAVL_CHID_NONE }
};
static gavl_channel_id_t get_channel(int ch)
{
int i;
for(i = 0; i < sizeof(channels)/sizeof(channels[0]); i++)
{
if(channels[i].faad_channel == ch)
return channels[i].gavl_channel;
}
return GAVL_CHID_AUX;
}
void bgav_faad_set_channel_setup(faacDecFrameInfo * frame_info,
gavl_audio_format_t * format)
{
int i;
/* This method fails for HE-AAC streams. So we
use our own detection for mono and stereo */
if(format->num_channels > 2)
{
for(i = 0; i < format->num_channels; i++)
format->channel_locations[i] =
get_channel(frame_info->channel_position[i]);
}
else
gavl_set_channel_setup(format);
}
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