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vlc/modules/codec/vorbis.c

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/*****************************************************************************
* vorbis.c: vorbis decoder/encoder/packetizer module using of libvorbis.
*****************************************************************************
* Copyright (C) 2001-2012 VLC authors and VideoLAN
* Copyright (C) 2007 Société des arts technologiques
* Copyright (C) 2007 Savoir-faire Linux
*
*
* Authors: Gildas Bazin <gbazin@videolan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_codec.h>
#include <vlc_charset.h>
#include <vlc_aout.h>
#include <vlc_input_item.h>
#include <vlc_sout.h>
#include "../demux/xiph.h"
#include <ogg/ogg.h>
#ifdef MODULE_NAME_IS_tremor
# include <tremor/ivorbiscodec.h>
# define INTERLEAVE_TYPE int32_t
#else
# include <vorbis/codec.h>
# define INTERLEAVE_TYPE float
# ifdef ENABLE_SOUT
# define HAVE_VORBIS_ENCODER
# include <vorbis/vorbisenc.h>
# ifndef OV_ECTL_RATEMANAGE_AVG
# define OV_ECTL_RATEMANAGE_AVG 0x0
# endif
# endif
#endif
/*****************************************************************************
* decoder_sys_t : vorbis decoder descriptor
*****************************************************************************/
typedef struct
{
/* Module mode */
bool b_packetizer;
bool b_has_headers;
/*
* Vorbis properties
*/
vorbis_info vi; /* struct that stores all the static vorbis bitstream
settings */
vorbis_comment vc; /* struct that stores all the bitstream user
* comments */
vorbis_dsp_state vd; /* central working state for the packet->PCM
* decoder */
vorbis_block vb; /* local working space for packet->PCM decode */
/*
* Common properties
*/
date_t end_date;
int i_last_block_size;
/*
** Channel reordering
*/
uint8_t pi_chan_table[AOUT_CHAN_MAX];
} decoder_sys_t;
static const int pi_channels_maps[9] =
{
0,
AOUT_CHAN_CENTER,
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
| AOUT_CHAN_REARRIGHT,
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE,
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARCENTER | AOUT_CHAN_MIDDLELEFT
| AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE,
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT
| AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
| AOUT_CHAN_LFE,
};
/*
** channel order as defined in http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9
*/
/* recommended vorbis channel order for 8 channels */
static const uint32_t pi_8channels_in[] =
{ AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,AOUT_CHAN_LFE, 0 };
/* recommended vorbis channel order for 7 channels */
static const uint32_t pi_7channels_in[] =
{ AOUT_CHAN_LEFT, AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT,
AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
AOUT_CHAN_REARCENTER, AOUT_CHAN_LFE, 0 };
/* 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_REARLEFT, AOUT_CHAN_REARRIGHT, 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 };
/****************************************************************************
* Local prototypes
****************************************************************************/
static int OpenDecoder ( vlc_object_t * );
static int OpenPacketizer( vlc_object_t * );
static void CloseDecoder ( vlc_object_t * );
static int DecodeAudio ( decoder_t *, block_t * );
static block_t *Packetize ( decoder_t *, block_t ** );
static void Flush( decoder_t * );
static int ProcessHeaders( decoder_t * );
static block_t *ProcessPacket ( decoder_t *, ogg_packet *, block_t ** );
static block_t *DecodePacket( decoder_t *, ogg_packet * );
static block_t *SendPacket( decoder_t *, ogg_packet *, block_t * );
static void ParseVorbisComments( decoder_t * );
static void ConfigureChannelOrder(uint8_t *, int, uint32_t );
#ifdef HAVE_VORBIS_ENCODER
static int OpenEncoder ( vlc_object_t * );
static void CloseEncoder ( vlc_object_t * );
static block_t *Encode ( encoder_t *, block_t * );
#endif
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define ENC_QUALITY_TEXT N_("Encoding quality")
#define ENC_QUALITY_LONGTEXT N_( \
"Enforce a quality between 1 (low) and 10 (high), instead " \
"of specifying a particular bitrate. This will produce a VBR stream." )
#define ENC_MAXBR_TEXT N_("Maximum encoding bitrate")
#define ENC_MAXBR_LONGTEXT N_( \
"Maximum bitrate in kbps. This is useful for streaming applications." )
#define ENC_MINBR_TEXT N_("Minimum encoding bitrate")
#define ENC_MINBR_LONGTEXT N_( \
"Minimum bitrate in kbps. This is useful for encoding for a fixed-size channel." )
#define ENC_CBR_TEXT N_("CBR encoding")
#define ENC_CBR_LONGTEXT N_( \
"Force a constant bitrate encoding (CBR)." )
vlc_module_begin ()
set_shortname( "Vorbis" )
set_description( N_("Vorbis audio decoder") )
#ifdef MODULE_NAME_IS_tremor
set_capability( "audio decoder", 90 )
#else
set_capability( "audio decoder", 100 )
#endif
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_ACODEC )
set_callbacks( OpenDecoder, CloseDecoder )
add_submodule ()
set_description( N_("Vorbis audio packetizer") )
set_capability( "packetizer", 100 )
set_callbacks( OpenPacketizer, CloseDecoder )
#ifdef HAVE_VORBIS_ENCODER
# define ENC_CFG_PREFIX "sout-vorbis-"
add_submodule ()
set_description( N_("Vorbis audio encoder") )
set_capability( "encoder", 130 )
set_callbacks( OpenEncoder, CloseEncoder )
add_integer( ENC_CFG_PREFIX "quality", 0, ENC_QUALITY_TEXT,
ENC_QUALITY_LONGTEXT, false )
change_integer_range( 0, 10 )
add_integer( ENC_CFG_PREFIX "max-bitrate", 0, ENC_MAXBR_TEXT,
ENC_MAXBR_LONGTEXT, false )
add_integer( ENC_CFG_PREFIX "min-bitrate", 0, ENC_MINBR_TEXT,
ENC_MINBR_LONGTEXT, false )
add_bool( ENC_CFG_PREFIX "cbr", false, ENC_CBR_TEXT,
ENC_CBR_LONGTEXT, false )
#endif
vlc_module_end ()
#ifdef HAVE_VORBIS_ENCODER
static const char *const ppsz_enc_options[] = {
"quality", "max-bitrate", "min-bitrate", "cbr", NULL
};
#endif
static int OpenCommon( vlc_object_t *p_this, bool b_packetizer )
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
if( p_dec->fmt_in.i_codec != VLC_CODEC_VORBIS )
return VLC_EGENERIC;
/* Allocate the memory needed to store the decoder's structure */
p_dec->p_sys = p_sys = malloc( sizeof(*p_sys) );
if( unlikely( !p_sys ) )
return VLC_ENOMEM;
/* Misc init */
date_Set( &p_sys->end_date, VLC_TICK_INVALID );
p_sys->i_last_block_size = 0;
p_sys->b_packetizer = b_packetizer;
p_sys->b_has_headers = false;
/* Take care of vorbis init */
vorbis_info_init( &p_sys->vi );
vorbis_comment_init( &p_sys->vc );
if( b_packetizer )
{
p_dec->fmt_out.i_codec = VLC_CODEC_VORBIS;
p_dec->pf_packetize = Packetize;
}
else
{
#ifdef MODULE_NAME_IS_tremor
p_dec->fmt_out.i_codec = VLC_CODEC_S32N;
#else
p_dec->fmt_out.i_codec = VLC_CODEC_FL32;
#endif
p_dec->pf_decode = DecodeAudio;
}
p_dec->pf_flush = Flush;
return VLC_SUCCESS;
}
static int OpenDecoder( vlc_object_t *p_this )
{
return OpenCommon( p_this, false );
}
static int OpenPacketizer( vlc_object_t *p_this )
{
return OpenCommon( p_this, true );
}
/****************************************************************************
* DecodeBlock: the whole thing
****************************************************************************
* This function must be fed with ogg packets.
****************************************************************************/
static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
ogg_packet oggpacket;
if( *pp_block )
{
/* Block to Ogg packet */
oggpacket.packet = (*pp_block)->p_buffer;
oggpacket.bytes = (*pp_block)->i_buffer;
}
else
{
if( p_sys->b_packetizer ) return NULL;
/* Block to Ogg packet */
oggpacket.packet = NULL;
oggpacket.bytes = 0;
}
oggpacket.granulepos = -1;
oggpacket.b_o_s = 0;
oggpacket.e_o_s = 0;
oggpacket.packetno = 0;
/* Check for headers */
if( !p_sys->b_has_headers )
{
if( ProcessHeaders( p_dec ) )
{
if( *pp_block )
block_Release( *pp_block );
return NULL;
}
p_sys->b_has_headers = true;
}
return ProcessPacket( p_dec, &oggpacket, pp_block );
}
static int DecodeAudio( decoder_t *p_dec, block_t *p_block )
{
if( p_block == NULL ) /* No Drain */
return VLCDEC_SUCCESS;
block_t **pp_block = &p_block, *p_out;
while( ( p_out = DecodeBlock( p_dec, pp_block ) ) != NULL )
decoder_QueueAudio( p_dec, p_out );
return VLCDEC_SUCCESS;
}
static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
{
if( pp_block == NULL ) /* No Drain */
return NULL;
return DecodeBlock( p_dec, pp_block );
}
/*****************************************************************************
* ProcessHeaders: process Vorbis headers.
*****************************************************************************/
static int ProcessHeaders( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
ogg_packet oggpacket;
unsigned pi_size[XIPH_MAX_HEADER_COUNT];
const void *pp_data[XIPH_MAX_HEADER_COUNT];
unsigned i_count;
if( xiph_SplitHeaders( pi_size, pp_data, &i_count,
p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra) )
return VLC_EGENERIC;
if( i_count < 3 )
return VLC_EGENERIC;
oggpacket.granulepos = -1;
oggpacket.e_o_s = 0;
oggpacket.packetno = 0;
/* Take care of the initial Vorbis header */
oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
oggpacket.bytes = pi_size[0];
oggpacket.packet = (void *)pp_data[0];
if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
{
msg_Err( p_dec, "this bitstream does not contain Vorbis audio data");
return VLC_EGENERIC;
}
/* Setup the format */
p_dec->fmt_out.audio.i_rate = p_sys->vi.rate;
p_dec->fmt_out.audio.i_channels = p_sys->vi.channels;
if( p_dec->fmt_out.audio.i_channels >= ARRAY_SIZE(pi_channels_maps) )
{
msg_Err( p_dec, "invalid number of channels (1-%zu): %i",
ARRAY_SIZE(pi_channels_maps),
p_dec->fmt_out.audio.i_channels );
return VLC_EGENERIC;
}
p_dec->fmt_out.audio.i_physical_channels =
pi_channels_maps[p_sys->vi.channels];
p_dec->fmt_out.i_bitrate = __MAX( 0, (int32_t) p_sys->vi.bitrate_nominal );
date_Init( &p_sys->end_date, p_sys->vi.rate, 1 );
msg_Dbg( p_dec, "channels:%d samplerate:%ld bitrate:%ud",
p_sys->vi.channels, p_sys->vi.rate, p_dec->fmt_out.i_bitrate );
/* The next packet in order is the comments header */
oggpacket.b_o_s = 0;
oggpacket.bytes = pi_size[1];
oggpacket.packet = (void *)pp_data[1];
if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
{
msg_Err( p_dec, "2nd Vorbis header is corrupted" );
return VLC_EGENERIC;
}
ParseVorbisComments( p_dec );
/* The next packet in order is the codebooks header
* We need to watch out that this packet is not missing as a
* missing or corrupted header is fatal. */
oggpacket.b_o_s = 0;
oggpacket.bytes = pi_size[2];
oggpacket.packet = (void *)pp_data[2];
if( vorbis_synthesis_headerin( &p_sys->vi, &p_sys->vc, &oggpacket ) < 0 )
{
msg_Err( p_dec, "3rd Vorbis header is corrupted" );
return VLC_EGENERIC;
}
if( !p_sys->b_packetizer )
{
/* Initialize the Vorbis packet->PCM decoder */
vorbis_synthesis_init( &p_sys->vd, &p_sys->vi );
vorbis_block_init( &p_sys->vd, &p_sys->vb );
}
else
{
void* p_extra = realloc( p_dec->fmt_out.p_extra,
p_dec->fmt_in.i_extra );
if( unlikely( p_extra == NULL ) )
{
return VLC_ENOMEM;
}
p_dec->fmt_out.p_extra = p_extra;
p_dec->fmt_out.i_extra = p_dec->fmt_in.i_extra;
memcpy( p_dec->fmt_out.p_extra,
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);
return VLC_SUCCESS;
}
/*****************************************************************************
* Flush:
*****************************************************************************/
static void Flush( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
date_Set( &p_sys->end_date, VLC_TICK_INVALID );
}
/*****************************************************************************
* ProcessPacket: processes a Vorbis packet.
*****************************************************************************/
static block_t *ProcessPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_block = *pp_block;
*pp_block = NULL; /* To avoid being fed the same packet again */
if( !p_block )
return NULL;
if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
{
Flush( p_dec );
if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
{
block_Release(p_block);
return NULL;
}
}
/* Date management */
if( p_block->i_pts != VLC_TICK_INVALID &&
p_block->i_pts != date_Get( &p_sys->end_date ) )
{
date_Set( &p_sys->end_date, p_block->i_pts );
}
if( date_Get( &p_sys->end_date ) == VLC_TICK_INVALID )
{
/* We've just started the stream, wait for the first PTS. */
if( p_block ) block_Release( p_block );
return NULL;
}
if( p_sys->b_packetizer )
{
return SendPacket( p_dec, p_oggpacket, p_block );
}
else
{
block_t *p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
if( p_block )
block_Release( p_block );
return p_aout_buffer;
}
}
/*****************************************************************************
* Interleave: helper function to interleave channels
*****************************************************************************/
static void Interleave( INTERLEAVE_TYPE *p_out, const INTERLEAVE_TYPE **pp_in,
int i_nb_channels, int i_samples, uint8_t *pi_chan_table)
{
for( int j = 0; j < i_samples; j++ )
for( int i = 0; i < i_nb_channels; i++ )
{
#ifdef MODULE_NAME_IS_tremor
union { int32_t i; uint32_t u;} spl;
spl.u = ((uint32_t)pp_in[i][j]) << 8;
p_out[j * i_nb_channels + pi_chan_table[i]] = spl.i;
#else
p_out[j * i_nb_channels + pi_chan_table[i]] = pp_in[i][j];
#endif
}
}
/*****************************************************************************
* DecodePacket: decodes a Vorbis packet.
*****************************************************************************/
static block_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
{
decoder_sys_t *p_sys = p_dec->p_sys;
int i_samples;
INTERLEAVE_TYPE **pp_pcm;
if( p_oggpacket->bytes &&
vorbis_synthesis( &p_sys->vb, p_oggpacket ) == 0 )
vorbis_synthesis_blockin( &p_sys->vd, &p_sys->vb );
/* **pp_pcm is a multichannel float vector. In stereo, for
* example, pp_pcm[0] is left, and pp_pcm[1] is right. i_samples is
* the size of each channel. Convert the float values
* (-1.<=range<=1.) to whatever PCM format and write it out */
if( ( i_samples = vorbis_synthesis_pcmout( &p_sys->vd, &pp_pcm ) ) > 0 )
{
block_t *p_aout_buffer;
if( decoder_UpdateAudioFormat( p_dec ) ) return NULL;
p_aout_buffer =
decoder_NewAudioBuffer( p_dec, i_samples );
if( p_aout_buffer == NULL ) return NULL;
/* Interleave the samples */
Interleave( (INTERLEAVE_TYPE*)p_aout_buffer->p_buffer,
(const INTERLEAVE_TYPE**)pp_pcm, p_sys->vi.channels, i_samples,
p_sys->pi_chan_table);
/* Tell libvorbis how many samples we actually consumed */
vorbis_synthesis_read( &p_sys->vd, i_samples );
/* Date management */
p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
p_aout_buffer->i_length = date_Increment( &p_sys->end_date,
i_samples ) - p_aout_buffer->i_pts;
return p_aout_buffer;
}
else
{
return NULL;
}
}
/*****************************************************************************
* SendPacket: send an ogg dated packet to the stream output.
*****************************************************************************/
static block_t *SendPacket( decoder_t *p_dec, ogg_packet *p_oggpacket,
block_t *p_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
int i_block_size, i_samples;
i_block_size = vorbis_packet_blocksize( &p_sys->vi, p_oggpacket );
if( i_block_size < 0 ) i_block_size = 0; /* non audio packet */
i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
p_sys->i_last_block_size = i_block_size;
/* Date management */
p_block->i_dts = p_block->i_pts = date_Get( &p_sys->end_date );
p_block->i_length = date_Increment( &p_sys->end_date, i_samples ) - p_block->i_pts;
return p_block;
}
/*****************************************************************************
* ParseVorbisComments
*****************************************************************************/
static void ParseVorbisComments( decoder_t *p_dec )
{
char *psz_name, *psz_value, *psz_comment;
int i = 0;
decoder_sys_t *p_sys = p_dec->p_sys;
while( i < p_sys->vc.comments )
{
psz_comment = strdup( p_sys->vc.user_comments[i] );
if( !psz_comment )
break;
psz_name = psz_comment;
psz_value = strchr( psz_comment, '=' );
/* Don't add empty values */
if( psz_value && psz_value[1] != '\0')
{
*psz_value = '\0';
psz_value++;
if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_GAIN" ) ||
!strcasecmp( psz_name, "RG_RADIO" ) )
{
audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
r->pb_gain[AUDIO_REPLAY_GAIN_TRACK] = true;
r->pf_gain[AUDIO_REPLAY_GAIN_TRACK] = us_atof( psz_value );
}
else if( !strcasecmp( psz_name, "REPLAYGAIN_TRACK_PEAK" ) ||
!strcasecmp( psz_name, "RG_PEAK" ) )
{
audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
r->pb_peak[AUDIO_REPLAY_GAIN_TRACK] = true;
r->pf_peak[AUDIO_REPLAY_GAIN_TRACK] = us_atof( psz_value );
}
else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_GAIN" ) ||
!strcasecmp( psz_name, "RG_AUDIOPHILE" ) )
{
audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
r->pb_gain[AUDIO_REPLAY_GAIN_ALBUM] = true;
r->pf_gain[AUDIO_REPLAY_GAIN_ALBUM] = us_atof( psz_value );
}
else if( !strcasecmp( psz_name, "REPLAYGAIN_ALBUM_PEAK" ) )
{
audio_replay_gain_t *r = &p_dec->fmt_out.audio_replay_gain;
r->pb_peak[AUDIO_REPLAY_GAIN_ALBUM] = true;
r->pf_peak[AUDIO_REPLAY_GAIN_ALBUM] = us_atof( psz_value );
}
else if( !strcasecmp( psz_name, "METADATA_BLOCK_PICTURE" ) )
{ /* Do nothing, for now */ }
else
{
if( !p_dec->p_description )
p_dec->p_description = vlc_meta_New();
if( p_dec->p_description )
vlc_meta_AddExtra( p_dec->p_description, psz_name, psz_value );
}
}
free( psz_comment );
i++;
}
}
/*****************************************************************************
*
*****************************************************************************/
static void ConfigureChannelOrder(uint8_t *pi_chan_table, int i_channels,
uint32_t i_channel_mask)
{
const uint32_t *pi_channels_in;
switch( i_channels )
{
case 8:
pi_channels_in = pi_8channels_in;
break;
case 7:
pi_channels_in = pi_7channels_in;
break;
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:
for( int i = 0; i< i_channels; ++i )
pi_chan_table[i] = i;
return;
}
aout_CheckChannelReorder( pi_channels_in, NULL,
i_channel_mask, pi_chan_table );
}
/*****************************************************************************
* CloseDecoder: vorbis decoder destruction
*****************************************************************************/
static void CloseDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
if( !p_sys->b_packetizer && p_sys->b_has_headers )
{
vorbis_block_clear( &p_sys->vb );
vorbis_dsp_clear( &p_sys->vd );
}
vorbis_comment_clear( &p_sys->vc );
vorbis_info_clear( &p_sys->vi ); /* must be called last */
free( p_sys );
}
#ifdef HAVE_VORBIS_ENCODER
/*****************************************************************************
* encoder_sys_t : vorbis encoder descriptor
*****************************************************************************/
typedef struct
{
/*
* Vorbis properties
*/
vorbis_info vi; /* struct that stores all the static vorbis bitstream
settings */
vorbis_comment vc; /* struct that stores all the bitstream user
* comments */
vorbis_dsp_state vd; /* central working state for the packet->PCM
* decoder */
vorbis_block vb; /* local working space for packet->PCM decode */
int i_last_block_size;
int i_samples_delay;
/*
** Channel reordering
*/
uint8_t pi_chan_table[AOUT_CHAN_MAX];
} encoder_sys_t;
/*****************************************************************************
* OpenEncoder: probe the encoder and return score
*****************************************************************************/
static int OpenEncoder( vlc_object_t *p_this )
{
encoder_t *p_enc = (encoder_t *)p_this;
encoder_sys_t *p_sys;
int i_quality, i_min_bitrate, i_max_bitrate;
ogg_packet header[3];
if( p_enc->fmt_out.i_codec != VLC_CODEC_VORBIS &&
!p_enc->obj.force )
{
return VLC_EGENERIC;
}
/* Allocate the memory needed to store the decoder's structure */
if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
return VLC_ENOMEM;
p_enc->p_sys = p_sys;
p_enc->pf_encode_audio = Encode;
p_enc->fmt_in.i_codec = VLC_CODEC_FL32;
p_enc->fmt_out.i_codec = VLC_CODEC_VORBIS;
if( p_enc->fmt_in.audio.i_channels >= ARRAY_SIZE(pi_channels_maps) )
{
p_enc->fmt_in.audio.i_channels = ARRAY_SIZE(pi_channels_maps) - 1;
msg_Warn( p_enc, "lowering channel count to %u", p_enc->fmt_in.audio.i_channels );
}
config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
i_quality = var_GetInteger( p_enc, ENC_CFG_PREFIX "quality" );
if( i_quality > 10 ) i_quality = 10;
if( i_quality < 0 ) i_quality = 0;
if( var_GetBool( p_enc, ENC_CFG_PREFIX "cbr" ) ) i_quality = 0;
i_max_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "max-bitrate" );
i_min_bitrate = var_GetInteger( p_enc, ENC_CFG_PREFIX "min-bitrate" );
/* Initialize vorbis encoder */
vorbis_info_init( &p_sys->vi );
if( i_quality > 0 )
{
/* VBR mode */
if( vorbis_encode_setup_vbr( &p_sys->vi,
p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
i_quality * 0.1 ) )
{
vorbis_info_clear( &p_sys->vi );
free( p_enc->p_sys );
msg_Err( p_enc, "VBR mode initialisation failed %"PRIu8"x(%uHz,q=%d)",
p_enc->fmt_in.audio.i_channels,
p_enc->fmt_in.audio.i_rate, i_quality );
return VLC_EGENERIC;
}
/* Do we have optional hard quality restrictions? */
if( i_max_bitrate > 0 || i_min_bitrate > 0 )
{
struct ovectl_ratemanage_arg ai;
vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_GET, &ai );
ai.bitrate_hard_min = i_min_bitrate;
ai.bitrate_hard_max = i_max_bitrate;
ai.management_active = 1;
vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, &ai );
}
else
{
/* Turn off management entirely */
vorbis_encode_ctl( &p_sys->vi, OV_ECTL_RATEMANAGE_SET, NULL );
}
}
else
{
if( vorbis_encode_setup_managed( &p_sys->vi,
p_enc->fmt_in.audio.i_channels, p_enc->fmt_in.audio.i_rate,
i_min_bitrate > 0 ? i_min_bitrate * 1000: -1,
p_enc->fmt_out.i_bitrate,
i_max_bitrate > 0 ? i_max_bitrate * 1000: -1 ) )
{
vorbis_info_clear( &p_sys->vi );
msg_Err( p_enc, "CBR mode initialisation failed %"PRIu8"x(%uHz,r=%u)",
p_enc->fmt_in.audio.i_channels,
p_enc->fmt_in.audio.i_rate,
p_enc->fmt_out.i_bitrate);
free( p_enc->p_sys );
return VLC_EGENERIC;
}
}
vorbis_encode_setup_init( &p_sys->vi );
/* Add a comment */
vorbis_comment_init( &p_sys->vc);
vorbis_comment_add_tag( &p_sys->vc, "ENCODER", "VLC media player");
/* Set up the analysis state and auxiliary encoding storage */
vorbis_analysis_init( &p_sys->vd, &p_sys->vi );
vorbis_block_init( &p_sys->vd, &p_sys->vb );
/* Create and store headers */
vorbis_analysis_headerout( &p_sys->vd, &p_sys->vc,
&header[0], &header[1], &header[2]);
for( int i = 0; i < 3; i++ )
{
if( xiph_AppendHeaders( &p_enc->fmt_out.i_extra, &p_enc->fmt_out.p_extra,
header[i].bytes, header[i].packet ) )
{
p_enc->fmt_out.i_extra = 0;
p_enc->fmt_out.p_extra = NULL;
}
}
assert(p_sys->vi.channels > 0 && (size_t) p_sys->vi.channels < ARRAY_SIZE(pi_channels_maps) );
p_enc->fmt_out.audio.i_channels = p_enc->fmt_in.audio.i_channels =
p_sys->vi.channels;
p_enc->fmt_out.audio.i_physical_channels =
p_enc->fmt_in.audio.i_physical_channels =
pi_channels_maps[p_sys->vi.channels];
p_sys->i_last_block_size = 0;
p_sys->i_samples_delay = 0;
ConfigureChannelOrder(p_sys->pi_chan_table, p_sys->vi.channels,
p_enc->fmt_in.audio.i_physical_channels);
return VLC_SUCCESS;
}
/****************************************************************************
* Encode: the whole thing
****************************************************************************
* This function spits out ogg packets.
****************************************************************************/
static block_t *Encode( encoder_t *p_enc, block_t *p_aout_buf )
{
encoder_sys_t *p_sys = p_enc->p_sys;
ogg_packet oggpacket;
block_t *p_block, *p_chain = NULL;
float **buffer;
/* Packets are already flushed, see bellow. */
if( unlikely( !p_aout_buf ) ) return NULL;
vlc_tick_t i_pts = p_aout_buf->i_pts -
vlc_tick_from_samples( p_sys->i_samples_delay,
p_enc->fmt_in.audio.i_rate );
p_sys->i_samples_delay += p_aout_buf->i_nb_samples;
buffer = vorbis_analysis_buffer( &p_sys->vd, p_aout_buf->i_nb_samples );
/* convert samples to float and uninterleave */
const unsigned i_channels = p_enc->fmt_in.audio.i_channels;
for( unsigned int i = 0; i < i_channels; i++ )
{
for( unsigned int j = 0 ; j < p_aout_buf->i_nb_samples ; j++ )
{
buffer[i][j]= ((float *)p_aout_buf->p_buffer)
[j * i_channels + p_sys->pi_chan_table[i]];
}
}
vorbis_analysis_wrote( &p_sys->vd, p_aout_buf->i_nb_samples );
while( vorbis_analysis_blockout( &p_sys->vd, &p_sys->vb ) == 1 )
{
int i_samples;
vorbis_analysis( &p_sys->vb, NULL );
vorbis_bitrate_addblock( &p_sys->vb );
while( vorbis_bitrate_flushpacket( &p_sys->vd, &oggpacket ) )
{
int i_block_size;
p_block = block_Alloc( oggpacket.bytes );
memcpy( p_block->p_buffer, oggpacket.packet, oggpacket.bytes );
i_block_size = vorbis_packet_blocksize( &p_sys->vi, &oggpacket );
if( i_block_size < 0 ) i_block_size = 0;
i_samples = ( p_sys->i_last_block_size + i_block_size ) >> 2;
p_sys->i_last_block_size = i_block_size;
p_block->i_length = vlc_tick_from_samples(i_samples,
p_enc->fmt_in.audio.i_rate);
p_block->i_dts = p_block->i_pts = i_pts;
p_sys->i_samples_delay -= i_samples;
/* Update pts */
i_pts += p_block->i_length;
block_ChainAppend( &p_chain, p_block );
}
}
return p_chain;
}
/*****************************************************************************
* CloseEncoder: vorbis encoder destruction
*****************************************************************************/
static void CloseEncoder( vlc_object_t *p_this )
{
encoder_t *p_enc = (encoder_t *)p_this;
encoder_sys_t *p_sys = p_enc->p_sys;
vorbis_block_clear( &p_sys->vb );
vorbis_dsp_clear( &p_sys->vd );
vorbis_comment_clear( &p_sys->vc );
vorbis_info_clear( &p_sys->vi ); /* must be called last */
free( p_sys );
}
#endif /* HAVE_VORBIS_ENCODER */