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[handbrake-jp/handbrake-jp-git.git] / libhb / encfaac.c
1 /* $Id: encfaac.c,v 1.13 2005/03/03 17:21:57 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 "faac.h"
10
11 struct hb_work_private_s
12 {
13     hb_job_t   * job;
14
15     faacEncHandle * faac;
16     unsigned long   input_samples;
17     unsigned long   output_bytes;
18     uint8_t       * buf;
19
20     hb_list_t     * list;
21     int64_t         pts;
22         
23         int             out_discrete_channels;
24
25 };
26
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 * );
30
31 hb_work_object_t hb_encfaac =
32 {
33     WORK_ENCFAAC,
34     "AAC encoder (libfaac)",
35     encfaacInit,
36     encfaacWork,
37     encfaacClose
38 };
39
40 /***********************************************************************
41  * hb_work_encfaac_init
42  ***********************************************************************
43  *
44  **********************************************************************/
45 int encfaacInit( hb_work_object_t * w, hb_job_t * job )
46 {
47     hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
48     faacEncConfigurationPtr cfg;
49     uint8_t * bytes;
50     unsigned long length;
51
52     w->private_data = pv;
53
54     pv->job   = job;
55
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);
58
59     pv->faac = faacEncOpen( job->arate, pv->out_discrete_channels, &pv->input_samples,
60                            &pv->output_bytes );
61     pv->buf  = malloc( pv->input_samples * sizeof( float ) );
62     
63     cfg                = faacEncGetCurrentConfiguration( pv->faac );
64     cfg->mpegVersion   = MPEG4;
65     cfg->aacObjectType = LOW;
66     cfg->allowMidside  = 1;
67         
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 */
71                 cfg->useLfe    = 1;
72         } else {
73                 cfg->useLfe    = 0;
74         }
75
76     cfg->useTns        = 0;
77     cfg->bitRate       = job->abitrate * 1000 / pv->out_discrete_channels; /* Per channel */
78     cfg->bandWidth     = 0;
79     cfg->outputFormat  = 0;
80     cfg->inputFormat   =  FAAC_INPUT_FLOAT;
81         
82         if (pv->out_discrete_channels == 6) {
83                 /* we are preserving 5.1 audio into 6-channel AAC, and need to
84                 re-map the output of deca52 into our own mapping - the mapping
85                 below is the default mapping expected by QuickTime */
86                 /* This doesn't seem to be correct for VLC on Linux */
87                 cfg->channel_map[0] = 2;
88                 cfg->channel_map[1] = 1;
89                 cfg->channel_map[2] = 3;
90                 cfg->channel_map[3] = 4;
91                 cfg->channel_map[4] = 5;
92                 cfg->channel_map[5] = 0;
93         }
94         
95     if( !faacEncSetConfiguration( pv->faac, cfg ) )
96     {
97         hb_log( "faacEncSetConfiguration failed" );
98         *job->die = 1;
99         return 0;
100     }
101
102     if( faacEncGetDecoderSpecificInfo( pv->faac, &bytes, &length ) < 0 )
103     {
104         hb_log( "faacEncGetDecoderSpecificInfo failed" );
105         *job->die = 1;
106         return 0;
107     }
108     memcpy( w->config->aac.bytes, bytes, length );
109     w->config->aac.length = length;
110     free( bytes );
111
112     pv->list = hb_list_init();
113     pv->pts  = -1;
114
115     return 0;
116 }
117
118 /***********************************************************************
119  * Close
120  ***********************************************************************
121  *
122  **********************************************************************/
123 void encfaacClose( hb_work_object_t * w )
124 {
125     hb_work_private_t * pv = w->private_data;
126     faacEncClose( pv->faac );
127     free( pv->buf );
128     hb_list_empty( &pv->list );
129     free( pv );
130     w->private_data = NULL;
131 }
132
133 /***********************************************************************
134  * Encode
135  ***********************************************************************
136  *
137  **********************************************************************/
138 static hb_buffer_t * Encode( hb_work_object_t * w )
139 {
140     hb_work_private_t * pv = w->private_data;
141     hb_buffer_t * buf;
142     uint64_t      pts, pos;
143
144     if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
145     {
146         /* Need more data */
147         return NULL;
148     }
149
150     hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
151                       &pts, &pos );
152
153     buf        = hb_buffer_init( pv->output_bytes );
154     buf->start = pts + 90000 * pos / pv->out_discrete_channels / sizeof( float ) / pv->job->arate;
155     buf->stop  = buf->start + 90000 * pv->input_samples / pv->job->arate / pv->out_discrete_channels;
156     buf->size  = faacEncEncode( pv->faac, (int32_t *) pv->buf,
157             pv->input_samples, buf->data, pv->output_bytes );
158     buf->key   = 1;
159
160     if( !buf->size )
161     {
162         /* Encoding was successful but we got no data. Try to encode
163            more */
164         hb_buffer_close( &buf );
165         return Encode( w );
166     }
167     else if( buf->size < 0 )
168     {
169         hb_log( "faacEncEncode failed" );
170         hb_buffer_close( &buf );
171         return NULL;
172     }
173
174     return buf;
175 }
176
177 /***********************************************************************
178  * Work
179  ***********************************************************************
180  *
181  **********************************************************************/
182 int encfaacWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
183                  hb_buffer_t ** buf_out )
184 {
185     hb_work_private_t * pv = w->private_data;
186     hb_buffer_t * buf;
187
188     hb_list_add( pv->list, *buf_in );
189     *buf_in = NULL;
190
191     *buf_out = buf = Encode( w );
192
193     while( buf )
194     {
195         buf->next = Encode( w );
196         buf       = buf->next;
197     }
198     
199     return HB_WORK_OK;
200 }
201