/*****************************************************************************
* vorbis.c: vorbis decoder/encoder/packetizer module making use of libvorbis.
*****************************************************************************
- * Copyright (C) 2001-2003 VideoLAN
+ * Copyright (C) 2001-2003 the VideoLAN team
* $Id$
*
* Authors: Gildas Bazin <gbazin@videolan.org>
audio_date_t end_date;
int i_last_block_size;
+ /*
+ ** Channel reordering
+ */
+ int pi_chan_table[AOUT_CHAN_MAX];
};
static int pi_channels_maps[7] =
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE
};
+/*
+** channel order as defined in http://www.ogghelp.com/ogg/glossary.cfm#Audio_Channels
+*/
+
+/* recommended vorbis channel order for 6 channels */
+static const uint32_t pi_6channels_in[] =
+{ AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
+ AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,AOUT_CHAN_LFE,0 };
+
+/* recommended vorbis channel order for 4 channels */
+static const uint32_t pi_4channels_in[] =
+{ AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
+
+/* recommended vorbis channel order for 3 channels */
+static const uint32_t pi_3channels_in[] =
+{ AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, 0 };
+
+/* our internal channel order (WG-4 order) */
+static const uint32_t pi_channels_out[] =
+{ AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
+ AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
+
/****************************************************************************
* Local prototypes
****************************************************************************/
static void ParseVorbisComments( decoder_t * );
+static void ConfigureChannelOrder(int *, int, uint32_t, vlc_bool_t );
+
#ifdef MODULE_NAME_IS_tremor
-static void Interleave ( int32_t *, const int32_t **, int, int );
+static void Interleave ( int32_t *, const int32_t **, int, int, int * );
#else
-static void Interleave ( float *, const float **, int, int );
+static void Interleave ( float *, const float **, int, int, int * );
#endif
#ifndef MODULE_NAME_IS_tremor
set_callbacks( OpenEncoder, CloseEncoder );
#endif
- add_integer( ENC_CFG_PREFIX "quality", 3, NULL, ENC_QUALITY_TEXT,
+ add_integer( ENC_CFG_PREFIX "quality", 0, NULL, ENC_QUALITY_TEXT,
ENC_QUALITY_LONGTEXT, VLC_FALSE );
add_integer( ENC_CFG_PREFIX "max-bitrate", 0, NULL, ENC_MAXBR_TEXT,
ENC_MAXBR_LONGTEXT, VLC_FALSE );
if( p_sys->i_headers == 0 && p_dec->fmt_in.i_extra )
{
/* Headers already available as extra data */
+ msg_Dbg( p_dec, "Headers already available as extra data" );
p_sys->i_headers = 3;
}
else if( oggpacket.bytes && p_sys->i_headers < 3 )
p_dec->fmt_in.p_extra, p_dec->fmt_out.i_extra );
}
+ ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
+ p_dec->fmt_out.audio.i_physical_channels, VLC_TRUE);
+
return VLC_SUCCESS;
}
/* Interleave the samples */
#ifdef MODULE_NAME_IS_tremor
Interleave( (int32_t *)p_aout_buffer->p_buffer,
- (const int32_t **)pp_pcm, p_sys->vi.channels, i_samples );
+ (const int32_t **)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table);
#else
Interleave( (float *)p_aout_buffer->p_buffer,
- (const float **)pp_pcm, p_sys->vi.channels, i_samples );
+ (const float **)pp_pcm, p_sys->vi.channels, i_samples, p_sys->pi_chan_table);
#endif
/* Tell libvorbis how many samples we actually consumed */
input_Control( p_input, INPUT_ADD_INFO, _("Vorbis comment"),
psz_name, psz_value );
/* HACK, we should use meta */
- if( strstr( psz_name, "artist" ) )
+ if( strcasestr( psz_name, "artist" ) )
{
input_Control( p_input, INPUT_ADD_INFO, _("Meta-information"),
_("Artist"), psz_value );
}
- else if( strstr( psz_name, "title" ) )
+ else if( strcasestr( psz_name, "title" ) )
{
p_input->input.p_item->psz_name = strdup( psz_value );
}
}
}
+/*****************************************************************************
+ * Interleave: helper function to interleave channels
+ *****************************************************************************/
+static void ConfigureChannelOrder(int *pi_chan_table, int i_channels, uint32_t i_channel_mask, vlc_bool_t b_decode)
+{
+ const uint32_t *pi_channels_in;
+ switch( i_channels )
+ {
+ case 6:
+ case 5:
+ pi_channels_in = pi_6channels_in;
+ break;
+ case 4:
+ pi_channels_in = pi_4channels_in;
+ break;
+ case 3:
+ pi_channels_in = pi_3channels_in;
+ break;
+ default:
+ {
+ int i;
+ for( i = 0; i< i_channels; ++i )
+ {
+ pi_chan_table[i] = i;
+ }
+ return;
+ }
+ }
+
+ if( b_decode )
+ aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
+ i_channel_mask & AOUT_CHAN_PHYSMASK,
+ i_channels,
+ pi_chan_table );
+ else
+ aout_CheckChannelReorder( pi_channels_out, pi_channels_in,
+ i_channel_mask & AOUT_CHAN_PHYSMASK,
+ i_channels,
+ pi_chan_table );
+}
+
/*****************************************************************************
* Interleave: helper function to interleave channels
*****************************************************************************/
#ifdef MODULE_NAME_IS_tremor
static void Interleave( int32_t *p_out, const int32_t **pp_in,
- int i_nb_channels, int i_samples )
+ int i_nb_channels, int i_samples, int *pi_chan_table)
{
int i, j;
for ( j = 0; j < i_samples; j++ )
for ( i = 0; i < i_nb_channels; i++ )
- p_out[j * i_nb_channels + i] = pp_in[i][j] * (FIXED32_ONE >> 24);
+ p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j] * (FIXED32_ONE >> 24);
}
#else
static void Interleave( float *p_out, const float **pp_in,
- int i_nb_channels, int i_samples )
+ int i_nb_channels, int i_samples, int *pi_chan_table )
{
int i, j;
for ( j = 0; j < i_samples; j++ )
for ( i = 0; i < i_nb_channels; i++ )
- p_out[j * i_nb_channels + i] = pp_in[i][j];
+ p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j];
}
#endif
* Common properties
*/
mtime_t i_pts;
+
+ /*
+ ** Channel reordering
+ */
+ int pi_chan_table[AOUT_CHAN_MAX];
+
};
/*****************************************************************************
p_sys->i_samples_delay = 0;
p_sys->i_pts = 0;
+ ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
+ p_enc->fmt_in.audio.i_physical_channels, VLC_TRUE);
+
return VLC_SUCCESS;
}
for( j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
{
buffer[i][j]= ((float *)p_aout_buf->p_buffer)
- [j * p_sys->i_channels + i ];
+ [j * p_sys->i_channels + p_sys->pi_chan_table[i]];
}
}