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.fr/>.
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;
42 int64_t prev_blocksize;
45 int encvorbisInit( hb_work_object_t * w, hb_job_t * job )
47 hb_audio_t * audio = w->audio;
51 hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
53 pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(audio->config.out.mixdown);
57 hb_log( "encvorbis: opening libvorbis" );
59 /* 28kbps/channel seems to be the minimum for 6ch vorbis. */
60 int min_bitrate = 28 * pv->out_discrete_channels;
61 if (pv->out_discrete_channels > 2 && audio->config.out.bitrate < min_bitrate)
63 hb_log( "encvorbis: Selected bitrate (%d kbps) too low for %d channel audio.", audio->config.out.bitrate, pv->out_discrete_channels);
64 hb_log( "encvorbis: Resetting bitrate to %d kbps", min_bitrate);
65 /* Naughty! We shouldn't modify the audio from here. */
66 audio->config.out.bitrate = min_bitrate;
70 for( i = 0; i < 3; i++ )
72 // Zero vorbis headers so that we don't crash in mk_laceXiph
73 // when vorbis_encode_setup_managed fails.
74 memset( w->config->vorbis.headers[i], 0, sizeof( ogg_packet ) );
76 vorbis_info_init( &pv->vi );
77 if( vorbis_encode_setup_managed( &pv->vi, pv->out_discrete_channels,
78 audio->config.out.samplerate, -1, 1000 * audio->config.out.bitrate, -1 ) )
80 hb_error( "encvorbis: vorbis_encode_setup_managed failed.\n" );
85 if( vorbis_encode_ctl( &pv->vi, OV_ECTL_RATEMANAGE2_SET, NULL ) ||
86 vorbis_encode_setup_init( &pv->vi ) )
88 hb_error( "encvorbis: vorbis_encode_ctl( ratemanage2_set ) OR vorbis_encode_setup_init failed.\n" );
94 vorbis_comment_init( &pv->vc );
95 vorbis_comment_add_tag( &pv->vc, "Encoder", "HandBrake");
96 vorbis_comment_add_tag( &pv->vc, "LANGUAGE", w->config->vorbis.language);
98 /* set up the analysis state and auxiliary encoding storage */
99 vorbis_analysis_init( &pv->vd, &pv->vi);
100 vorbis_block_init( &pv->vd, &pv->vb);
102 /* get the 3 headers */
103 vorbis_analysis_headerout( &pv->vd, &pv->vc,
104 &header[0], &header[1], &header[2] );
105 for( i = 0; i < 3; i++ )
107 memcpy( w->config->vorbis.headers[i], &header[i],
108 sizeof( ogg_packet ) );
109 memcpy( w->config->vorbis.headers[i] + sizeof( ogg_packet ),
110 header[i].packet, header[i].bytes );
113 pv->input_samples = pv->out_discrete_channels * OGGVORBIS_FRAME_SIZE;
114 pv->buf = malloc( pv->input_samples * sizeof( float ) );
116 pv->list = hb_list_init();
118 switch (pv->out_discrete_channels) {
120 pv->channel_map[0] = 0;
123 // Vorbis use the following channels map = L C R Ls Rs Lfe
124 if( audio->config.in.codec == HB_ACODEC_AC3 )
126 pv->channel_map[0] = 1;
127 pv->channel_map[1] = 2;
128 pv->channel_map[2] = 3;
129 pv->channel_map[3] = 4;
130 pv->channel_map[4] = 5;
131 pv->channel_map[5] = 0;
135 pv->channel_map[0] = 1;
136 pv->channel_map[1] = 0;
137 pv->channel_map[2] = 2;
138 pv->channel_map[3] = 3;
139 pv->channel_map[4] = 4;
140 pv->channel_map[5] = 5;
144 hb_log("encvorbis.c: Unable to correctly proccess %d channels, assuming stereo.", pv->out_discrete_channels);
147 pv->channel_map[0] = 0;
148 pv->channel_map[1] = 1;
155 /***********************************************************************
157 ***********************************************************************
159 **********************************************************************/
160 void encvorbisClose( hb_work_object_t * w )
162 hb_work_private_t * pv = w->private_data;
164 vorbis_block_clear( &pv->vb );
165 vorbis_dsp_clear( &pv->vd );
166 vorbis_comment_clear( &pv->vc );
167 vorbis_info_clear( &pv->vi );
170 hb_list_empty( &pv->list );
174 w->private_data = NULL;
177 /***********************************************************************
179 ***********************************************************************
181 **********************************************************************/
182 static hb_buffer_t * Flush( hb_work_object_t * w )
184 hb_work_private_t * pv = w->private_data;
186 int64_t blocksize = 0;
188 if( vorbis_analysis_blockout( &pv->vd, &pv->vb ) == 1 )
192 vorbis_analysis( &pv->vb, NULL );
193 vorbis_bitrate_addblock( &pv->vb );
195 if( vorbis_bitrate_flushpacket( &pv->vd, &op ) )
197 buf = hb_buffer_init( sizeof( ogg_packet ) + op.bytes );
198 memcpy( buf->data, &op, sizeof( ogg_packet ) );
199 memcpy( buf->data + sizeof( ogg_packet ), op.packet,
201 blocksize = vorbis_packet_blocksize(&pv->vi, &op);
202 buf->frametype = HB_FRAME_AUDIO;
203 buf->start = (int64_t)(vorbis_granule_time(&pv->vd, op.granulepos) * 90000);
204 buf->stop = (int64_t)(vorbis_granule_time(&pv->vd, (pv->prev_blocksize + blocksize)/4 + op.granulepos) * 90000);
205 /* The stop time isn't accurate for the first ~3 packets, as the actual blocksize depends on the previous _and_ current packets. */
206 pv->prev_blocksize = blocksize;
214 /***********************************************************************
216 ***********************************************************************
218 **********************************************************************/
219 static hb_buffer_t * Encode( hb_work_object_t * w )
221 hb_work_private_t * pv = w->private_data;
226 /* Try to extract more data */
227 if( ( buf = Flush( w ) ) )
232 if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
237 /* Process more samples */
238 hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
240 buffer = vorbis_analysis_buffer( &pv->vd, OGGVORBIS_FRAME_SIZE );
241 for( i = 0; i < OGGVORBIS_FRAME_SIZE; i++ )
243 for( j = 0; j < pv->out_discrete_channels; j++)
245 buffer[j][i] = ((float *) pv->buf)[(pv->out_discrete_channels * i + pv->channel_map[j])] / 32768.f;
248 vorbis_analysis_wrote( &pv->vd, OGGVORBIS_FRAME_SIZE );
250 /* Try to extract again */
254 /***********************************************************************
256 ***********************************************************************
258 **********************************************************************/
259 int encvorbisWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
260 hb_buffer_t ** buf_out )
262 hb_work_private_t * pv = w->private_data;
265 if ( (*buf_in)->size <= 0 )
267 /* EOF on input - send it downstream & say we're done */
273 hb_list_add( pv->list, *buf_in );
276 *buf_out = buf = Encode( w );
280 buf->next = Encode( w );