1 /* $Id: encvorbis.c,v 1.6 2005/03/05 15:08:32 titer Exp $
3 This file is part of the HandBrake source code.
4 Homepage: <http://handbrake.m0k.org/>.
5 It may be used under the terms of the GNU General Public License. */
9 #include "vorbis/vorbisenc.h"
11 #define OGGVORBIS_FRAME_SIZE 1024
13 int encvorbisInit( hb_work_object_t *, hb_job_t * );
14 int encvorbisWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
15 void encvorbisClose( hb_work_object_t * );
17 hb_work_object_t hb_encvorbis =
20 "Vorbis encoder (libvorbis)",
26 struct hb_work_private_s
35 unsigned long input_samples;
40 int out_discrete_channels;
44 int encvorbisInit( hb_work_object_t * w, hb_job_t * job )
49 hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
51 pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(w->amixdown);
55 hb_log( "encvorbis: opening libvorbis" );
58 vorbis_info_init( &pv->vi );
59 if( vorbis_encode_setup_managed( &pv->vi, pv->out_discrete_channels,
60 job->arate, -1, 1000 * job->abitrate, -1 ) ||
61 vorbis_encode_ctl( &pv->vi, OV_ECTL_RATEMANAGE_AVG, NULL ) ||
62 vorbis_encode_setup_init( &pv->vi ) )
64 hb_log( "encvorbis: vorbis_encode_setup_managed failed" );
68 vorbis_comment_init( &pv->vc );
69 vorbis_comment_add_tag( &pv->vc, "Encoder", "HandBrake");
70 vorbis_comment_add_tag( &pv->vc, "LANGUAGE", w->config->vorbis.language);
72 /* set up the analysis state and auxiliary encoding storage */
73 vorbis_analysis_init( &pv->vd, &pv->vi);
74 vorbis_block_init( &pv->vd, &pv->vb);
76 /* get the 3 headers */
77 vorbis_analysis_headerout( &pv->vd, &pv->vc,
78 &header[0], &header[1], &header[2] );
79 for( i = 0; i < 3; i++ )
81 memcpy( w->config->vorbis.headers[i], &header[i],
82 sizeof( ogg_packet ) );
83 memcpy( w->config->vorbis.headers[i] + sizeof( ogg_packet ),
84 header[i].packet, header[i].bytes );
87 pv->input_samples = pv->out_discrete_channels * OGGVORBIS_FRAME_SIZE;
88 pv->buf = malloc( pv->input_samples * sizeof( float ) );
90 pv->list = hb_list_init();
92 switch (pv->out_discrete_channels) {
94 pv->channel_map[0] = 0;
97 pv->channel_map[0] = 0;
98 pv->channel_map[1] = 2;
99 pv->channel_map[2] = 1;
100 pv->channel_map[3] = 4;
101 pv->channel_map[4] = 5;
102 pv->channel_map[5] = 3;
105 hb_log("encvorbis.c: Unable to correctly proccess %d channels, assuming stereo.", pv->out_discrete_channels);
108 pv->channel_map[0] = 0;
109 pv->channel_map[1] = 1;
116 /***********************************************************************
118 ***********************************************************************
120 **********************************************************************/
121 void encvorbisClose( hb_work_object_t * w )
123 hb_work_private_t * pv = w->private_data;
125 vorbis_block_clear( &pv->vb );
126 vorbis_dsp_clear( &pv->vd );
127 vorbis_comment_clear( &pv->vc );
128 vorbis_info_clear( &pv->vi );
130 hb_list_empty( &pv->list );
134 w->private_data = NULL;
137 /***********************************************************************
139 ***********************************************************************
141 **********************************************************************/
142 static hb_buffer_t * Flush( hb_work_object_t * w )
144 hb_work_private_t * pv = w->private_data;
147 if( vorbis_analysis_blockout( &pv->vd, &pv->vb ) == 1 )
151 vorbis_analysis( &pv->vb, NULL );
152 vorbis_bitrate_addblock( &pv->vb );
154 if( vorbis_bitrate_flushpacket( &pv->vd, &op ) )
156 buf = hb_buffer_init( sizeof( ogg_packet ) + op.bytes );
157 memcpy( buf->data, &op, sizeof( ogg_packet ) );
158 memcpy( buf->data + sizeof( ogg_packet ), op.packet,
160 buf->frametype = HB_FRAME_AUDIO;
161 buf->start = pv->pts; /* No exact, but who cares - the OGM
162 muxer doesn't use it */
163 buf->stop = buf->start +
164 90000 * OGGVORBIS_FRAME_SIZE + pv->job->arate;
173 /***********************************************************************
175 ***********************************************************************
177 **********************************************************************/
178 static hb_buffer_t * Encode( hb_work_object_t * w )
180 hb_work_private_t * pv = w->private_data;
185 /* Try to extract more data */
186 if( ( buf = Flush( w ) ) )
191 if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
196 /* Process more samples */
197 hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
199 buffer = vorbis_analysis_buffer( &pv->vd, OGGVORBIS_FRAME_SIZE );
200 for( i = 0; i < OGGVORBIS_FRAME_SIZE; i++ )
202 for( j = 0; j < pv->out_discrete_channels; j++)
204 buffer[j][i] = ((float *) pv->buf)[(pv->out_discrete_channels * i + pv->channel_map[j])] / 32768.f;
207 vorbis_analysis_wrote( &pv->vd, OGGVORBIS_FRAME_SIZE );
209 /* Try to extract again */
213 /***********************************************************************
215 ***********************************************************************
217 **********************************************************************/
218 int encvorbisWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
219 hb_buffer_t ** buf_out )
221 hb_work_private_t * pv = w->private_data;
224 hb_list_add( pv->list, *buf_in );
227 *buf_out = buf = Encode( w );
231 buf->next = Encode( w );