1 /* $Id: enclame.c,v 1.9 2005/03/05 14:27:05 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. */
11 int enclameInit( hb_work_object_t *, hb_job_t * );
12 int enclameWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
13 void enclameClose( hb_work_object_t * );
15 hb_work_object_t hb_enclame =
18 "MP3 encoder (libmp3lame)",
24 struct hb_work_private_s
29 lame_global_flags * lame;
31 unsigned long input_samples;
32 unsigned long output_bytes;
39 int enclameInit( hb_work_object_t * w, hb_job_t * job )
41 hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
46 hb_log( "enclame: opening libmp3lame" );
48 pv->lame = lame_init();
49 lame_set_brate( pv->lame, job->abitrate );
50 lame_set_in_samplerate( pv->lame, job->arate );
51 lame_set_out_samplerate( pv->lame, job->arate );
52 lame_init_params( pv->lame );
54 pv->input_samples = 1152 * 2;
55 pv->output_bytes = LAME_MAXMP3BUFFER;
56 pv->buf = malloc( pv->input_samples * sizeof( float ) );
58 pv->list = hb_list_init();
64 /***********************************************************************
66 ***********************************************************************
68 **********************************************************************/
69 void enclameClose( hb_work_object_t * w )
73 /***********************************************************************
75 ***********************************************************************
77 **********************************************************************/
78 static hb_buffer_t * Encode( hb_work_object_t * w )
80 hb_work_private_t * pv = w->private_data;
82 int16_t samples_s16[1152 * 2];
86 if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
91 hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
94 for( i = 0; i < 1152 * 2; i++ )
96 samples_s16[i] = ((float*) pv->buf)[i];
99 buf = hb_buffer_init( pv->output_bytes );
100 buf->start = pts + 90000 * pos / 2 / sizeof( float ) / pv->job->arate;
101 buf->stop = buf->start + 90000 * 1152 / pv->job->arate;
102 buf->size = lame_encode_buffer_interleaved( pv->lame, samples_s16,
103 1152, buf->data, LAME_MAXMP3BUFFER );
108 /* Encoding was successful but we got no data. Try to encode
110 hb_buffer_close( &buf );
113 else if( buf->size < 0 )
115 hb_log( "enclame: lame_encode_buffer failed" );
116 hb_buffer_close( &buf );
123 /***********************************************************************
125 ***********************************************************************
127 **********************************************************************/
128 int enclameWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
129 hb_buffer_t ** buf_out )
131 hb_work_private_t * pv = w->private_data;
134 hb_list_add( pv->list, *buf_in );
137 *buf_out = buf = Encode( w );
141 buf->next = Encode( w );