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 faacEncConfigurationPtr cfg;
56 /* pass the number of channels used into the private work data */
57 pv->out_discrete_channels = HB_AMIXDOWN_GET_DISCRETE_CHANNEL_COUNT(w->amixdown);
59 pv->faac = faacEncOpen( job->arate, pv->out_discrete_channels, &pv->input_samples,
61 pv->buf = malloc( pv->input_samples * sizeof( float ) );
63 cfg = faacEncGetCurrentConfiguration( pv->faac );
64 cfg->mpegVersion = MPEG4;
65 cfg->aacObjectType = LOW;
66 cfg->allowMidside = 1;
68 if (pv->out_discrete_channels == 6) {
69 /* we are preserving 5.1 audio into 6-channel AAC,
70 so indicate that we have an lfe channel */
77 cfg->bitRate = job->abitrate * 1000 / pv->out_discrete_channels; /* Per channel */
79 cfg->outputFormat = 0;
80 cfg->inputFormat = FAAC_INPUT_FLOAT;
82 if (w->amixdown == HB_AMIXDOWN_6CH && w->source_acodec == HB_ACODEC_AC3)
84 /* we are preserving 5.1 AC-3 audio into 6-channel AAC, and need to
85 re-map the output of deca52 into our own mapping - the mapping
86 below is the default mapping expected by QuickTime */
87 /* DTS output from libdca is already in the right mapping for QuickTime */
88 /* This doesn't seem to be correct for VLC on Linux */
89 cfg->channel_map[0] = 2;
90 cfg->channel_map[1] = 1;
91 cfg->channel_map[2] = 3;
92 cfg->channel_map[3] = 4;
93 cfg->channel_map[4] = 5;
94 cfg->channel_map[5] = 0;
97 if( !faacEncSetConfiguration( pv->faac, cfg ) )
99 hb_log( "faacEncSetConfiguration failed" );
104 if( faacEncGetDecoderSpecificInfo( pv->faac, &bytes, &length ) < 0 )
106 hb_log( "faacEncGetDecoderSpecificInfo failed" );
110 memcpy( w->config->aac.bytes, bytes, length );
111 w->config->aac.length = length;
114 pv->list = hb_list_init();
120 /***********************************************************************
122 ***********************************************************************
124 **********************************************************************/
125 void encfaacClose( hb_work_object_t * w )
127 hb_work_private_t * pv = w->private_data;
128 faacEncClose( pv->faac );
130 hb_list_empty( &pv->list );
132 w->private_data = NULL;
135 /***********************************************************************
137 ***********************************************************************
139 **********************************************************************/
140 static hb_buffer_t * Encode( hb_work_object_t * w )
142 hb_work_private_t * pv = w->private_data;
146 if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
152 hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
155 buf = hb_buffer_init( pv->output_bytes );
156 buf->start = pts + 90000 * pos / pv->out_discrete_channels / sizeof( float ) / pv->job->arate;
157 buf->stop = buf->start + 90000 * pv->input_samples / pv->job->arate / pv->out_discrete_channels;
158 buf->size = faacEncEncode( pv->faac, (int32_t *) pv->buf,
159 pv->input_samples, buf->data, pv->output_bytes );
164 /* Encoding was successful but we got no data. Try to encode
166 hb_buffer_close( &buf );
169 else if( buf->size < 0 )
171 hb_log( "faacEncEncode failed" );
172 hb_buffer_close( &buf );
179 /***********************************************************************
181 ***********************************************************************
183 **********************************************************************/
184 int encfaacWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
185 hb_buffer_t ** buf_out )
187 hb_work_private_t * pv = w->private_data;
190 hb_list_add( pv->list, *buf_in );
193 *buf_out = buf = Encode( w );
197 buf->next = Encode( w );