diff options
Diffstat (limited to 'libhb/deca52.c')
| -rw-r--r-- | libhb/deca52.c | 97 |
1 files changed, 90 insertions, 7 deletions
diff --git a/libhb/deca52.c b/libhb/deca52.c index 6695d3687..1495611da 100644 --- a/libhb/deca52.c +++ b/libhb/deca52.c @@ -38,9 +38,11 @@ struct hb_work_private_s }; -int deca52Init( hb_work_object_t *, hb_job_t * ); -int deca52Work( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** ); -void deca52Close( hb_work_object_t * ); +static int deca52Init( hb_work_object_t *, hb_job_t * ); +static int deca52Work( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** ); +static void deca52Close( hb_work_object_t * ); +static int deca52BSInfo( hb_work_object_t * , const hb_buffer_t *, + hb_work_info_t * ); hb_work_object_t hb_deca52 = { @@ -48,7 +50,9 @@ hb_work_object_t hb_deca52 = "AC3 decoder", deca52Init, deca52Work, - deca52Close + deca52Close, + 0, + deca52BSInfo }; /*********************************************************************** @@ -85,7 +89,7 @@ static sample_t dynrng_call (sample_t c, void *data) *********************************************************************** * Allocate the work object, initialize liba52 **********************************************************************/ -int deca52Init( hb_work_object_t * w, hb_job_t * job ) +static int deca52Init( hb_work_object_t * w, hb_job_t * job ) { hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) ); hb_audio_t * audio = w->audio; @@ -119,7 +123,7 @@ int deca52Init( hb_work_object_t * w, hb_job_t * job ) *********************************************************************** * Free memory **********************************************************************/ -void deca52Close( hb_work_object_t * w ) +static void deca52Close( hb_work_object_t * w ) { hb_work_private_t * pv = w->private_data; a52_free( pv->state ); @@ -134,7 +138,7 @@ void deca52Close( hb_work_object_t * w ) * Add the given buffer to the data we already have, and decode as much * as we can **********************************************************************/ -int deca52Work( hb_work_object_t * w, hb_buffer_t ** buf_in, +static int deca52Work( hb_work_object_t * w, hb_buffer_t ** buf_in, hb_buffer_t ** buf_out ) { hb_work_private_t * pv = w->private_data; @@ -276,3 +280,82 @@ static hb_buffer_t * Decode( hb_work_object_t * w ) return buf; } +static int deca52BSInfo( hb_work_object_t *w, const hb_buffer_t *b, + hb_work_info_t *info ) +{ + int i, rate, bitrate, flags; + + memset( info, 0, sizeof(*info) ); + + /* since AC3 frames don't line up with MPEG ES frames scan the + * entire frame for an AC3 sync pattern. */ + for ( i = 0; i < b->size - 7; ++i ) + { + if( a52_syncinfo( &b->data[i], &flags, &rate, &bitrate ) != 0 ) + { + break; + } + } + if ( i >= b->size - 7 ) + { + /* didn't find AC3 sync */ + return 0; + } + + info->name = "AC-3"; + info->rate = rate; + info->rate_base = 1; + info->bitrate = bitrate; + info->flags = flags; + if ( (flags & A52_CHANNEL_MASK) == A52_DOLBY ) + { + info->flags |= AUDIO_F_DOLBY; + } + + switch( flags & A52_CHANNEL_MASK ) + { + /* mono sources */ + case A52_MONO: + case A52_CHANNEL1: + case A52_CHANNEL2: + info->channel_layout = HB_INPUT_CH_LAYOUT_MONO; + break; + /* stereo input */ + case A52_CHANNEL: + case A52_STEREO: + info->channel_layout = HB_INPUT_CH_LAYOUT_STEREO; + break; + /* dolby (DPL1 aka Dolby Surround = 4.0 matrix-encoded) input */ + case A52_DOLBY: + info->channel_layout = HB_INPUT_CH_LAYOUT_DOLBY; + break; + /* 3F/2R input */ + case A52_3F2R: + info->channel_layout = HB_INPUT_CH_LAYOUT_3F2R; + break; + /* 3F/1R input */ + case A52_3F1R: + info->channel_layout = HB_INPUT_CH_LAYOUT_3F1R; + break; + /* other inputs */ + case A52_3F: + info->channel_layout = HB_INPUT_CH_LAYOUT_3F; + break; + case A52_2F1R: + info->channel_layout = HB_INPUT_CH_LAYOUT_2F1R; + break; + case A52_2F2R: + info->channel_layout = HB_INPUT_CH_LAYOUT_2F2R; + break; + /* unknown */ + default: + info->channel_layout = HB_INPUT_CH_LAYOUT_STEREO; + } + + if (flags & A52_LFE) + { + info->channel_layout |= HB_INPUT_CH_LAYOUT_HAS_LFE; + } + + return 1; +} |