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/* $Id: encfaac.c,v 1.13 2005/03/03 17:21:57 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
#include "faac.h"
struct hb_work_private_s
{
hb_job_t * job;
faacEncHandle * faac;
unsigned long input_samples;
unsigned long output_bytes;
uint8_t * buf;
hb_list_t * list;
int64_t pts;
int out_discrete_channels;
};
int encfaacInit( hb_work_object_t *, hb_job_t * );
int encfaacWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
void encfaacClose( hb_work_object_t * );
hb_work_object_t hb_encfaac =
{
WORK_ENCFAAC,
"AAC encoder (libfaac)",
encfaacInit,
encfaacWork,
encfaacClose
};
/***********************************************************************
* hb_work_encfaac_init
***********************************************************************
*
**********************************************************************/
int encfaacInit( hb_work_object_t * w, hb_job_t * job )
{
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
faacEncConfigurationPtr cfg;
uint8_t * bytes;
unsigned long length;
w->private_data = pv;
pv->job = job;
/* pass the number of channels used into the private work data */
pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(w->amixdown);
pv->faac = faacEncOpen( job->arate, pv->out_discrete_channels, &pv->input_samples,
&pv->output_bytes );
pv->buf = malloc( pv->input_samples * sizeof( float ) );
cfg = faacEncGetCurrentConfiguration( pv->faac );
cfg->mpegVersion = MPEG4;
cfg->aacObjectType = LOW;
cfg->allowMidside = 1;
if (pv->out_discrete_channels == 6) {
/* we are preserving 5.1 audio into 6-channel AAC,
so indicate that we have an lfe channel */
cfg->useLfe = 1;
} else {
cfg->useLfe = 0;
}
cfg->useTns = 0;
cfg->bitRate = job->abitrate * 1000 / pv->out_discrete_channels; /* Per channel */
cfg->bandWidth = 0;
cfg->outputFormat = 0;
cfg->inputFormat = FAAC_INPUT_FLOAT;
if (pv->out_discrete_channels == 6) {
/* we are preserving 5.1 audio into 6-channel AAC, and need to
re-map the output of deca52 into our own mapping - the mapping
below is the default mapping expected by QuickTime */
/* This doesn't seem to be correct for VLC on Linux */
cfg->channel_map[0] = 2;
cfg->channel_map[1] = 1;
cfg->channel_map[2] = 3;
cfg->channel_map[3] = 4;
cfg->channel_map[4] = 5;
cfg->channel_map[5] = 0;
}
if( !faacEncSetConfiguration( pv->faac, cfg ) )
{
hb_log( "faacEncSetConfiguration failed" );
}
if( faacEncGetDecoderSpecificInfo( pv->faac, &bytes, &length ) < 0 )
{
hb_log( "faacEncGetDecoderSpecificInfo failed" );
}
memcpy( w->config->aac.bytes, bytes, length );
w->config->aac.length = length;
free( bytes );
pv->list = hb_list_init();
pv->pts = -1;
return 0;
}
/***********************************************************************
* Close
***********************************************************************
*
**********************************************************************/
void encfaacClose( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
faacEncClose( pv->faac );
free( pv->buf );
hb_list_empty( &pv->list );
free( pv );
w->private_data = NULL;
}
/***********************************************************************
* Encode
***********************************************************************
*
**********************************************************************/
static hb_buffer_t * Encode( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * buf;
uint64_t pts, pos;
if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
{
/* Need more data */
return NULL;
}
hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
&pts, &pos );
buf = hb_buffer_init( pv->output_bytes );
buf->start = pts + 90000 * pos / pv->out_discrete_channels / sizeof( float ) / pv->job->arate;
buf->stop = buf->start + 90000 * pv->input_samples / pv->job->arate / pv->out_discrete_channels;
buf->size = faacEncEncode( pv->faac, (int32_t *) pv->buf,
pv->input_samples, buf->data, pv->output_bytes );
buf->key = 1;
if( !buf->size )
{
/* Encoding was successful but we got no data. Try to encode
more */
hb_buffer_close( &buf );
return Encode( w );
}
else if( buf->size < 0 )
{
hb_log( "faacEncEncode failed" );
hb_buffer_close( &buf );
return NULL;
}
return buf;
}
/***********************************************************************
* Work
***********************************************************************
*
**********************************************************************/
int encfaacWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * buf;
hb_list_add( pv->list, *buf_in );
*buf_in = NULL;
*buf_out = buf = Encode( w );
while( buf )
{
buf->next = Encode( w );
buf = buf->next;
}
return HB_WORK_OK;
}
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