1 /* $Id: encfaac.c,v 1.13 2005/03/03 17:21:57 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 struct hb_work_private_s
16 unsigned long input_samples;
17 unsigned long output_bytes;
23 int out_discrete_channels;
27 int encfaacInit( hb_work_object_t *, hb_job_t * );
28 int encfaacWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
29 void encfaacClose( hb_work_object_t * );
31 hb_work_object_t hb_encfaac =
34 "AAC encoder (libfaac)",
40 /***********************************************************************
41 * hb_work_encfaac_init
42 ***********************************************************************
44 **********************************************************************/
45 int encfaacInit( hb_work_object_t * w, hb_job_t * job )
47 hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
48 hb_audio_t * audio = w->audio;
49 faacEncConfigurationPtr cfg;
57 /* pass the number of channels used into the private work data */
58 pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(audio->config.out.mixdown);
60 pv->faac = faacEncOpen( audio->config.out.samplerate, pv->out_discrete_channels, &pv->input_samples,
62 pv->buf = malloc( pv->input_samples * sizeof( float ) );
64 cfg = faacEncGetCurrentConfiguration( pv->faac );
65 cfg->mpegVersion = MPEG4;
66 cfg->aacObjectType = LOW;
67 cfg->allowMidside = 1;
69 if (pv->out_discrete_channels == 6) {
70 /* we are preserving 5.1 audio into 6-channel AAC,
71 so indicate that we have an lfe channel */
78 cfg->bitRate = audio->config.out.bitrate * 1000 / pv->out_discrete_channels; /* Per channel */
80 cfg->outputFormat = 0;
81 cfg->inputFormat = FAAC_INPUT_FLOAT;
83 if (audio->config.out.mixdown == HB_AMIXDOWN_6CH && audio->config.in.codec == HB_ACODEC_AC3)
85 /* we are preserving 5.1 AC-3 audio into 6-channel AAC, and need to
86 re-map the output of deca52 into our own mapping - the mapping
87 below is the default mapping expected by QuickTime */
88 /* DTS output from libdca is already in the right mapping for QuickTime */
89 /* This doesn't seem to be correct for VLC on Linux */
90 cfg->channel_map[0] = 2;
91 cfg->channel_map[1] = 1;
92 cfg->channel_map[2] = 3;
93 cfg->channel_map[3] = 4;
94 cfg->channel_map[4] = 5;
95 cfg->channel_map[5] = 0;
98 if( !faacEncSetConfiguration( pv->faac, cfg ) )
100 hb_log( "faacEncSetConfiguration failed" );
105 if( faacEncGetDecoderSpecificInfo( pv->faac, &bytes, &length ) < 0 )
107 hb_log( "faacEncGetDecoderSpecificInfo failed" );
111 memcpy( w->config->aac.bytes, bytes, length );
112 w->config->aac.length = length;
115 pv->list = hb_list_init();
121 /***********************************************************************
123 ***********************************************************************
125 **********************************************************************/
126 void encfaacClose( hb_work_object_t * w )
128 hb_work_private_t * pv = w->private_data;
129 faacEncClose( pv->faac );
131 hb_list_empty( &pv->list );
133 w->private_data = NULL;
136 /***********************************************************************
138 ***********************************************************************
140 **********************************************************************/
141 static hb_buffer_t * Encode( hb_work_object_t * w )
143 hb_work_private_t * pv = w->private_data;
144 hb_audio_t * audio = w->audio;
148 if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
154 hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
157 buf = hb_buffer_init( pv->output_bytes );
158 buf->start = pts + 90000 * pos / pv->out_discrete_channels / sizeof( float ) / audio->config.out.samplerate;
159 buf->stop = buf->start + 90000 * pv->input_samples / audio->config.out.samplerate / pv->out_discrete_channels;
160 buf->size = faacEncEncode( pv->faac, (int32_t *) pv->buf,
161 pv->input_samples, buf->data, pv->output_bytes );
162 buf->frametype = HB_FRAME_AUDIO;
166 /* Encoding was successful but we got no data. Try to encode
168 hb_buffer_close( &buf );
171 else if( buf->size < 0 )
173 hb_log( "faacEncEncode failed" );
174 hb_buffer_close( &buf );
181 /***********************************************************************
183 ***********************************************************************
185 **********************************************************************/
186 int encfaacWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
187 hb_buffer_t ** buf_out )
189 hb_work_private_t * pv = w->private_data;
192 hb_list_add( pv->list, *buf_in );
195 *buf_out = buf = Encode( w );
199 buf->next = Encode( w );