libhb/encvorbis.c

   1 /* $Id: encvorbis.c,v 1.6 2005/03/05 15:08:32 titer Exp $
   2
   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. */
   6
   7 #include "hb.h"
   8
   9 #include "vorbis/vorbisenc.h"
  10
  11 #define OGGVORBIS_FRAME_SIZE 1024
  12
  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 * );
  16
  17 hb_work_object_t hb_encvorbis =
  18 {
  19     WORK_ENCVORBIS,
  20     "Vorbis encoder (libvorbis)",
  21     encvorbisInit,
  22     encvorbisWork,
  23     encvorbisClose
  24 };
  25
  26 struct hb_work_private_s
  27 {
  28     hb_job_t   * job;
  29
  30     vorbis_info        vi;
  31     vorbis_comment     vc;
  32     vorbis_dsp_state   vd;
  33     vorbis_block       vb;
  34
  35     unsigned long   input_samples;
  36     uint8_t       * buf;
  37     uint64_t        pts;
  38
  39     hb_list_t     * list;
  40     int           out_discrete_channels;
  41     int           channel_map[6];
  42     int64_t       prev_blocksize;
  43 };
  44
  45 int encvorbisInit( hb_work_object_t * w, hb_job_t * job )
  46 {
  47     int i;
  48     ogg_packet header[3];
  49     struct ovectl_ratemanage2_arg  ctl_rate_arg;
  50
  51     hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
  52     w->private_data = pv;
  53     pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(w->amixdown);
  54
  55     pv->job   = job;
  56
  57     hb_log( "encvorbis: opening libvorbis" );
  58
  59     /* init */
  60     vorbis_info_init( &pv->vi );
  61     if( vorbis_encode_setup_managed( &pv->vi, pv->out_discrete_channels,
  62           job->arate, -1, 1000 * job->abitrate, -1 ) )
  63     {
  64         hb_log( "encvorbis: vorbis_encode_setup_managed failed" );
  65         *job->die = 1;
  66         return 0;
  67     }
  68
  69     if( vorbis_encode_ctl( &pv->vi, OV_ECTL_RATEMANAGE2_GET, &ctl_rate_arg) )
  70     {
  71         hb_log( "encvorbis: vorbis_encode_ctl( ratemanage2_get ) failed" );
  72     }
  73
  74     ctl_rate_arg.bitrate_average_kbps = 1000 * job->abitrate;
  75     ctl_rate_arg.management_active = 1;
  76
  77     if( vorbis_encode_ctl( &pv->vi, OV_ECTL_RATEMANAGE2_SET, &ctl_rate_arg ) ||
  78           vorbis_encode_setup_init( &pv->vi ) )
  79     {
  80         hb_log( "encvorbis: vorbis_encode_ctl( ratemanage2_set ) OR vorbis_encode_setup_init failed" );
  81         *job->die = 1;
  82         return 0;
  83     }
  84
  85     /* add a comment */
  86     vorbis_comment_init( &pv->vc );
  87     vorbis_comment_add_tag( &pv->vc, "Encoder", "HandBrake");
  88     vorbis_comment_add_tag( &pv->vc, "LANGUAGE", w->config->vorbis.language);
  89
  90     /* set up the analysis state and auxiliary encoding storage */
  91     vorbis_analysis_init( &pv->vd, &pv->vi);
  92     vorbis_block_init( &pv->vd, &pv->vb);
  93
  94     /* get the 3 headers */
  95     vorbis_analysis_headerout( &pv->vd, &pv->vc,
  96                                &header[0], &header[1], &header[2] );
  97     for( i = 0; i < 3; i++ )
  98     {
  99         memcpy( w->config->vorbis.headers[i], &header[i],
 100                 sizeof( ogg_packet ) );
 101         memcpy( w->config->vorbis.headers[i] + sizeof( ogg_packet ),
 102                 header[i].packet, header[i].bytes );
 103     }
 104
 105     pv->input_samples = pv->out_discrete_channels * OGGVORBIS_FRAME_SIZE;
 106     pv->buf = malloc( pv->input_samples * sizeof( float ) );
 107
 108     pv->list = hb_list_init();
 109
 110     switch (pv->out_discrete_channels) {
 111         case 1:
 112             pv->channel_map[0] = 0;
 113             break;
 114         case 6:
 115             pv->channel_map[0] = 0;
 116             pv->channel_map[1] = 2;
 117             pv->channel_map[2] = 1;
 118             pv->channel_map[3] = 4;
 119             pv->channel_map[4] = 5;
 120             pv->channel_map[5] = 3;
 121             break;
 122         default:
 123             hb_log("encvorbis.c: Unable to correctly proccess %d channels, assuming stereo.", pv->out_discrete_channels);
 124         case 2:
 125             // Assume stereo
 126             pv->channel_map[0] = 0;
 127             pv->channel_map[1] = 1;
 128             break;
 129     }
 130
 131     return 0;
 132 }
 133
 134 /***********************************************************************
 135  * Close
 136  ***********************************************************************
 137  *
 138  **********************************************************************/
 139 void encvorbisClose( hb_work_object_t * w )
 140 {
 141     hb_work_private_t * pv = w->private_data;
 142
 143     vorbis_block_clear( &pv->vb );
 144     vorbis_dsp_clear( &pv->vd );
 145     vorbis_comment_clear( &pv->vc );
 146     vorbis_info_clear( &pv->vi );
 147
 148     hb_list_empty( &pv->list );
 149
 150     free( pv->buf );
 151     free( pv );
 152     w->private_data = NULL;
 153 }
 154
 155 /***********************************************************************
 156  * Flush
 157  ***********************************************************************
 158  *
 159  **********************************************************************/
 160 static hb_buffer_t * Flush( hb_work_object_t * w )
 161 {
 162     hb_work_private_t * pv = w->private_data;
 163     hb_buffer_t * buf;
 164     int64_t     blocksize = 0;
 165
 166     if( vorbis_analysis_blockout( &pv->vd, &pv->vb ) == 1 )
 167     {
 168         ogg_packet op;
 169
 170         vorbis_analysis( &pv->vb, NULL );
 171         vorbis_bitrate_addblock( &pv->vb );
 172
 173         if( vorbis_bitrate_flushpacket( &pv->vd, &op ) )
 174         {
 175             buf = hb_buffer_init( sizeof( ogg_packet ) + op.bytes );
 176             memcpy( buf->data, &op, sizeof( ogg_packet ) );
 177             memcpy( buf->data + sizeof( ogg_packet ), op.packet,
 178                     op.bytes );
 179             blocksize = vorbis_packet_blocksize(&pv->vi, &op);
 180             buf->frametype   = HB_FRAME_AUDIO;
 181             buf->start = (int64_t)(vorbis_granule_time(&pv->vd, op.granulepos) * 90000);
 182             buf->stop  = (int64_t)(vorbis_granule_time(&pv->vd, (pv->prev_blocksize + blocksize)/4 + op.granulepos) * 90000);
 183             /* The stop time isn't accurate for the first ~3 packets, as the actual blocksize depends on the previous _and_ current packets. */
 184             pv->prev_blocksize = blocksize;
 185             return buf;
 186         }
 187     }
 188
 189     return NULL;
 190 }
 191
 192 /***********************************************************************
 193  * Encode
 194  ***********************************************************************
 195  *
 196  **********************************************************************/
 197 static hb_buffer_t * Encode( hb_work_object_t * w )
 198 {
 199     hb_work_private_t * pv = w->private_data;
 200     hb_buffer_t * buf;
 201     float ** buffer;
 202     int i, j;
 203
 204     /* Try to extract more data */
 205     if( ( buf = Flush( w ) ) )
 206     {
 207         return buf;
 208     }
 209
 210     if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
 211     {
 212         return NULL;
 213     }
 214
 215     /* Process more samples */
 216     hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
 217                       &pv->pts, NULL );
 218     buffer = vorbis_analysis_buffer( &pv->vd, OGGVORBIS_FRAME_SIZE );
 219     for( i = 0; i < OGGVORBIS_FRAME_SIZE; i++ )
 220     {
 221         for( j = 0; j < pv->out_discrete_channels; j++)
 222         {
 223             buffer[j][i] = ((float *) pv->buf)[(pv->out_discrete_channels * i + pv->channel_map[j])] / 32768.f;
 224         }
 225     }
 226     vorbis_analysis_wrote( &pv->vd, OGGVORBIS_FRAME_SIZE );
 227
 228     /* Try to extract again */
 229     return Flush( w );
 230 }
 231
 232 /***********************************************************************
 233  * Work
 234  ***********************************************************************
 235  *
 236  **********************************************************************/
 237 int encvorbisWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
 238                    hb_buffer_t ** buf_out )
 239 {
 240     hb_work_private_t * pv = w->private_data;
 241     hb_buffer_t * buf;
 242
 243     hb_list_add( pv->list, *buf_in );
 244     *buf_in = NULL;
 245
 246     *buf_out = buf = Encode( w );
 247
 248     while( buf )
 249     {
 250         buf->next = Encode( w );
 251         buf       = buf->next;
 252     }
 253
 254     return HB_WORK_OK;
 255 }