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/* $Id: VorbisEnc.c,v 1.9 2004/05/02 16:25:00 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 "HBInternal.h"
/* libvorbis */
#include <vorbis/vorbisenc.h>
#define OGGVORBIS_FRAME_SIZE 1024
struct HBWork
{
HB_WORK_COMMON_MEMBERS
HBHandle * handle;
HBAudio * audio;
int inited;
vorbis_info vi;
vorbis_comment vc;
vorbis_dsp_state vd;
vorbis_block vb;
float position;
int32_t * inputBuffer;
};
/* Local prototypes */
static int VorbisEncWork( HBWork * );
HBWork * HBVorbisEncInit ( HBHandle * handle, HBAudio * audio )
{
HBWork * w = calloc( sizeof( HBWork ), 1 );
w->name = strdup( "VorbisEnc" );
w->work = VorbisEncWork;
w->handle = handle;
w->audio = audio;
w->inputBuffer = malloc( 2 * OGGVORBIS_FRAME_SIZE * sizeof( int32_t ) );
return w;
}
void HBVorbisEncClose( HBWork ** _w )
{
HBWork * w = *_w;
if( w->inited )
{
vorbis_block_clear( &w->vb );
vorbis_dsp_clear( &w->vd );
vorbis_comment_clear( &w->vc );
vorbis_info_clear( &w->vi );
}
free( w->name );
free( w );
*_w = NULL;
}
static HBBuffer *PacketToBuffer( ogg_packet *op )
{
HBBuffer *buf = HBBufferInit( sizeof( ogg_packet ) + op->bytes );
memcpy( buf->data, op, sizeof( ogg_packet ) );
memcpy( buf->data + sizeof( ogg_packet ), op->packet, op->bytes );
return buf;
}
static int VorbisEncWork( HBWork * w )
{
HBAudio * audio = w->audio;
float **buffer;
int i;
float inputBuffer[OGGVORBIS_FRAME_SIZE * 2];
HBBuffer * vorbisBuffer;
if( HBFifoIsHalfFull( audio->outFifo ) )
{
return 0;
}
if( !w->inited )
{
ogg_packet header[3];
if( !HBFifoSize( audio->resampleFifo ) )
{
return 0;
}
w->inited = 1;
/* init */
vorbis_info_init( &w->vi );
if( vorbis_encode_setup_managed( &w->vi, 2,
audio->outSampleRate, -1, 1000 * audio->outBitrate, -1 ) ||
vorbis_encode_ctl( &w->vi, OV_ECTL_RATEMANAGE_AVG, NULL ) ||
vorbis_encode_setup_init( &w->vi ) )
{
HBLog( "HBVorbisEnc: vorbis_encode_setup_managed failed" );
return 0;
}
/* add a comment */
vorbis_comment_init( &w->vc );
vorbis_comment_add_tag( &w->vc, "ENCODER", "HandBrake");
/* set up the analysis state and auxiliary encoding storage */
vorbis_analysis_init( &w->vd, &w->vi);
vorbis_block_init( &w->vd, &w->vb);
/* get the 3 headers */
vorbis_analysis_headerout( &w->vd, &w->vc,
&header[0], &header[1], &header[2] );
for( i = 0; i < 3; i++ )
{
vorbisBuffer = PacketToBuffer( &header[i] );
if( !HBFifoPush( audio->outFifo, &vorbisBuffer ) )
{
HBLog( "HBVorbisEnc: HBFifoPush failed" );
}
}
}
/* Try to extract more data */
if( vorbis_analysis_blockout( &w->vd, &w->vb ) == 1 )
{
ogg_packet op;
vorbis_analysis( &w->vb, NULL );
vorbis_bitrate_addblock( &w->vb );
if( vorbis_bitrate_flushpacket( &w->vd, &op ) )
{
vorbisBuffer = PacketToBuffer( &op );
vorbisBuffer->position = w->position;
if( !HBFifoPush( audio->outFifo, &vorbisBuffer ) )
{
HBLog( "HBVorbisEnc: HBFifoPush failed" );
}
return 1;
}
}
if( !HBFifoGetBytes( audio->resampleFifo, (uint8_t*) inputBuffer,
OGGVORBIS_FRAME_SIZE * 2 * sizeof( float ),
&w->position ) )
{
return 0;
}
buffer = vorbis_analysis_buffer( &w->vd, OGGVORBIS_FRAME_SIZE );
for( i = 0; i < OGGVORBIS_FRAME_SIZE; i++ )
{
buffer[0][i] = inputBuffer[2*i] / 32768.f;
buffer[1][i] = inputBuffer[2*i+1] / 32768.f;
}
vorbis_analysis_wrote( &w->vd, OGGVORBIS_FRAME_SIZE );
return 1;
}
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