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/* $Id: encvorbis.c,v 1.6 2005/03/05 15:08:32 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 "vorbis/vorbisenc.h"
#define OGGVORBIS_FRAME_SIZE 1024
int encvorbisInit( hb_work_object_t *, hb_job_t * );
int encvorbisWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
void encvorbisClose( hb_work_object_t * );
hb_work_object_t hb_encvorbis =
{
WORK_ENCVORBIS,
"Vorbis encoder (libvorbis)",
encvorbisInit,
encvorbisWork,
encvorbisClose
};
struct hb_work_private_s
{
hb_job_t * job;
vorbis_info vi;
vorbis_comment vc;
vorbis_dsp_state vd;
vorbis_block vb;
unsigned long input_samples;
uint8_t * buf;
uint64_t pts;
hb_list_t * list;
int out_discrete_channels;
int channel_map[6];
};
int encvorbisInit( hb_work_object_t * w, hb_job_t * job )
{
int i;
ogg_packet header[3];
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
w->private_data = pv;
pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(w->amixdown);
pv->job = job;
hb_log( "encvorbis: opening libvorbis" );
/* init */
vorbis_info_init( &pv->vi );
if( vorbis_encode_setup_managed( &pv->vi, pv->out_discrete_channels,
job->arate, -1, 1000 * job->abitrate, -1 ) ||
vorbis_encode_ctl( &pv->vi, OV_ECTL_RATEMANAGE_AVG, NULL ) ||
vorbis_encode_setup_init( &pv->vi ) )
{
hb_log( "encvorbis: vorbis_encode_setup_managed failed" );
}
/* add a comment */
vorbis_comment_init( &pv->vc );
vorbis_comment_add_tag( &pv->vc, "Encoder", "HandBrake");
vorbis_comment_add_tag( &pv->vc, "LANGUAGE", w->config->vorbis.language);
/* set up the analysis state and auxiliary encoding storage */
vorbis_analysis_init( &pv->vd, &pv->vi);
vorbis_block_init( &pv->vd, &pv->vb);
/* get the 3 headers */
vorbis_analysis_headerout( &pv->vd, &pv->vc,
&header[0], &header[1], &header[2] );
for( i = 0; i < 3; i++ )
{
memcpy( w->config->vorbis.headers[i], &header[i],
sizeof( ogg_packet ) );
memcpy( w->config->vorbis.headers[i] + sizeof( ogg_packet ),
header[i].packet, header[i].bytes );
}
pv->input_samples = pv->out_discrete_channels * OGGVORBIS_FRAME_SIZE;
pv->buf = malloc( pv->input_samples * sizeof( float ) );
pv->list = hb_list_init();
switch (pv->out_discrete_channels) {
case 1:
pv->channel_map[0] = 0;
break;
case 6:
pv->channel_map[0] = 0;
pv->channel_map[1] = 2;
pv->channel_map[2] = 1;
pv->channel_map[3] = 4;
pv->channel_map[4] = 5;
pv->channel_map[5] = 3;
break;
default:
hb_log("encvorbis.c: Unable to correctly proccess %d channels, assuming stereo.", pv->out_discrete_channels);
case 2:
// Assume stereo
pv->channel_map[0] = 0;
pv->channel_map[1] = 1;
break;
}
return 0;
}
/***********************************************************************
* Close
***********************************************************************
*
**********************************************************************/
void encvorbisClose( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
vorbis_block_clear( &pv->vb );
vorbis_dsp_clear( &pv->vd );
vorbis_comment_clear( &pv->vc );
vorbis_info_clear( &pv->vi );
hb_list_empty( &pv->list );
free( pv->buf );
free( pv );
w->private_data = NULL;
}
/***********************************************************************
* Flush
***********************************************************************
*
**********************************************************************/
static hb_buffer_t * Flush( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * buf;
if( vorbis_analysis_blockout( &pv->vd, &pv->vb ) == 1 )
{
ogg_packet op;
vorbis_analysis( &pv->vb, NULL );
vorbis_bitrate_addblock( &pv->vb );
if( vorbis_bitrate_flushpacket( &pv->vd, &op ) )
{
buf = hb_buffer_init( sizeof( ogg_packet ) + op.bytes );
memcpy( buf->data, &op, sizeof( ogg_packet ) );
memcpy( buf->data + sizeof( ogg_packet ), op.packet,
op.bytes );
buf->frametype = HB_FRAME_AUDIO;
buf->start = pv->pts; /* No exact, but who cares - the OGM
muxer doesn't use it */
buf->stop = buf->start +
90000 * OGGVORBIS_FRAME_SIZE + pv->job->arate;
return buf;
}
}
return NULL;
}
/***********************************************************************
* Encode
***********************************************************************
*
**********************************************************************/
static hb_buffer_t * Encode( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * buf;
float ** buffer;
int i, j;
/* Try to extract more data */
if( ( buf = Flush( w ) ) )
{
return buf;
}
if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
{
return NULL;
}
/* Process more samples */
hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
&pv->pts, NULL );
buffer = vorbis_analysis_buffer( &pv->vd, OGGVORBIS_FRAME_SIZE );
for( i = 0; i < OGGVORBIS_FRAME_SIZE; i++ )
{
for( j = 0; j < pv->out_discrete_channels; j++)
{
buffer[j][i] = ((float *) pv->buf)[(pv->out_discrete_channels * i + pv->channel_map[j])] / 32768.f;
}
}
vorbis_analysis_wrote( &pv->vd, OGGVORBIS_FRAME_SIZE );
/* Try to extract again */
return Flush( w );
}
/***********************************************************************
* Work
***********************************************************************
*
**********************************************************************/
int encvorbisWork( 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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