/* $Id: encvorbis.c,v 1.6 2005/03/05 15:08:32 titer Exp $ This file is part of the HandBrake source code. Homepage: . 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; }