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 (w->amixdown == HB_AMIXDOWN_6CH && w->source_acodec == HB_ACODEC_AC3)
  83     {
  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;
  95         }
  96
  97     if( !faacEncSetConfiguration( pv->faac, cfg ) )
  98     {
  99         hb_log( "faacEncSetConfiguration failed" );
 100         *job->die = 1;
 101         return 0;
 102     }
 103
 104     if( faacEncGetDecoderSpecificInfo( pv->faac, &bytes, &length ) < 0 )
 105     {
 106         hb_log( "faacEncGetDecoderSpecificInfo failed" );
 107         *job->die = 1;
 108         return 0;
 109     }
 110     memcpy( w->config->aac.bytes, bytes, length );
 111     w->config->aac.length = length;
 112     free( bytes );
 113
 114     pv->list = hb_list_init();
 115     pv->pts  = -1;
 116
 117     return 0;
 118 }
 119
 120 /***********************************************************************
 121  * Close
 122  ***********************************************************************
 123  *
 124  **********************************************************************/
 125 void encfaacClose( hb_work_object_t * w )
 126 {
 127     hb_work_private_t * pv = w->private_data;
 128     faacEncClose( pv->faac );
 129     free( pv->buf );
 130     hb_list_empty( &pv->list );
 131     free( pv );
 132     w->private_data = NULL;
 133 }
 134
 135 /***********************************************************************
 136  * Encode
 137  ***********************************************************************
 138  *
 139  **********************************************************************/
 140 static hb_buffer_t * Encode( hb_work_object_t * w )
 141 {
 142     hb_work_private_t * pv = w->private_data;
 143     hb_buffer_t * buf;
 144     uint64_t      pts, pos;
 145
 146     if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
 147     {
 148         /* Need more data */
 149         return NULL;
 150     }
 151
 152     hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
 153                       &pts, &pos );
 154
 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 );
 160     buf->frametype   = HB_FRAME_AUDIO;
 161
 162     if( !buf->size )
 163     {
 164         /* Encoding was successful but we got no data. Try to encode
 165            more */
 166         hb_buffer_close( &buf );
 167         return Encode( w );
 168     }
 169     else if( buf->size < 0 )
 170     {
 171         hb_log( "faacEncEncode failed" );
 172         hb_buffer_close( &buf );
 173         return NULL;
 174     }
 175
 176     return buf;
 177 }
 178
 179 /***********************************************************************
 180  * Work
 181  ***********************************************************************
 182  *
 183  **********************************************************************/
 184 int encfaacWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
 185                  hb_buffer_t ** buf_out )
 186 {
 187     hb_work_private_t * pv = w->private_data;
 188     hb_buffer_t * buf;
 189
 190     hb_list_add( pv->list, *buf_in );
 191     *buf_in = NULL;
 192
 193     *buf_out = buf = Encode( w );
 194
 195     while( buf )
 196     {
 197         buf->next = Encode( w );
 198         buf       = buf->next;
 199     }
 200
 201     return HB_WORK_OK;
 202 }
 203