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vlc/modules/codec/speex.c

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/*****************************************************************************
* speex.c: speex decoder/packetizer/encoder module making use of libspeex.
*****************************************************************************
* Copyright (C) 2003-2009 VLC authors and VideoLAN
*
* 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_configuration.h>
#include <vlc_plugin.h>
#include <vlc_input_item.h>
#include <vlc_codec.h>
#include "../demux/xiph.h"
#include <ogg/ogg.h>
#include <speex/speex.h>
#include <speex/speex_header.h>
#include <speex/speex_stereo.h>
#include <speex/speex_callbacks.h>
#include <assert.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int OpenDecoder ( vlc_object_t * );
static int OpenPacketizer( vlc_object_t * );
static void CloseDecoder ( vlc_object_t * );
#ifdef ENABLE_SOUT
static int OpenEncoder ( vlc_object_t * );
static void CloseEncoder ( encoder_t * );
#endif
#define ENC_CFG_PREFIX "sout-speex-"
#define ENC_MODE_TEXT N_("Mode" )
#define ENC_MODE_LONGTEXT N_( \
"Enforce the mode of the encoder." )
#define ENC_QUALITY_TEXT N_("Encoding quality")
#define ENC_QUALITY_LONGTEXT N_( \
"Enforce a quality between 0 (low) and 10 (high)." )
#define ENC_COMPLEXITY_TEXT N_("Encoding complexity" )
#define ENC_COMPLEXITY_LONGTEXT N_( \
"Enforce the complexity of the encoder." )
#define ENC_MAXBITRATE_TEXT N_( "Maximal bitrate" )
#define ENC_MAXBITRATE_LONGTEXT N_( \
"Enforce the maximal VBR bitrate" )
#define ENC_CBR_TEXT N_( "CBR encoding" )
#define ENC_CBR_LONGTEXT N_( \
"Enforce a constant bitrate encoding (CBR) instead of default " \
"variable bitrate encoding (VBR)." )
#define ENC_VAD_TEXT N_( "Voice activity detection" )
#define ENC_VAD_LONGTEXT N_( \
"Enable voice activity detection (VAD). It is automatically " \
"activated in VBR mode." )
#define ENC_DTX_TEXT N_( "Discontinuous Transmission" )
#define ENC_DTX_LONGTEXT N_( \
"Enable discontinuous transmission (DTX)." )
static const int pi_enc_mode_values[] = { 0, 1, 2 };
static const char * const ppsz_enc_mode_descriptions[] = {
N_("Narrow-band (8kHz)"), N_("Wide-band (16kHz)"), N_("Ultra-wideband (32kHz)")
};
vlc_module_begin ()
set_subcategory( SUBCAT_INPUT_ACODEC )
set_description( N_("Speex audio decoder") )
set_capability( "audio decoder", 100 )
set_shortname( N_("Speex") )
set_callbacks( OpenDecoder, CloseDecoder )
add_submodule ()
set_description( N_("Speex audio packetizer") )
set_capability( "packetizer", 100 )
set_callbacks( OpenPacketizer, CloseDecoder )
#ifdef ENABLE_SOUT
add_submodule ()
set_description( N_("Speex audio encoder") )
set_capability( "audio encoder", 100 )
set_callback( OpenEncoder )
add_integer( ENC_CFG_PREFIX "mode", 0, ENC_MODE_TEXT,
ENC_MODE_LONGTEXT )
change_integer_list( pi_enc_mode_values, ppsz_enc_mode_descriptions )
add_integer( ENC_CFG_PREFIX "complexity", 3, ENC_COMPLEXITY_TEXT,
ENC_COMPLEXITY_LONGTEXT )
change_integer_range( 1, 10 )
add_bool( ENC_CFG_PREFIX "cbr", false, ENC_CBR_TEXT,
ENC_CBR_LONGTEXT )
add_float( ENC_CFG_PREFIX "quality", 8.0, ENC_QUALITY_TEXT,
ENC_QUALITY_LONGTEXT )
change_float_range( 0.0, 10.0 )
add_integer( ENC_CFG_PREFIX "max-bitrate", 0, ENC_MAXBITRATE_TEXT,
ENC_MAXBITRATE_LONGTEXT )
add_bool( ENC_CFG_PREFIX "vad", true, ENC_VAD_TEXT,
ENC_VAD_LONGTEXT )
add_bool( ENC_CFG_PREFIX "dtx", false, ENC_DTX_TEXT,
ENC_DTX_LONGTEXT )
/* TODO agc, noise suppression, */
#endif
vlc_module_end ()
static const char *const ppsz_enc_options[] = {
"mode", "complexity", "cbr", "quality", "max-bitrate", "vad", "dtx", NULL
};
/*****************************************************************************
* decoder_sys_t : speex decoder descriptor
*****************************************************************************/
typedef struct
{
/* Module mode */
bool b_packetizer;
/*
* Input properties
*/
bool b_has_headers;
int i_frame_in_packet;
/*
* Speex properties
*/
SpeexBits bits;
SpeexHeader *p_header;
SpeexStereoState stereo;
void *p_state;
unsigned int rtp_rate;
/*
* Common properties
*/
date_t end_date;
} decoder_sys_t;
/****************************************************************************
* Local prototypes
****************************************************************************/
static block_t *Packetize ( decoder_t *, block_t ** );
static int DecodeAudio ( decoder_t *, block_t * );
static int DecodeRtpSpeexPacket( decoder_t *, block_t *);
static int ProcessHeaders( decoder_t * );
static int ProcessInitialHeader ( decoder_t *, ogg_packet * );
static block_t *ProcessPacket( decoder_t *, ogg_packet *, block_t ** );
static void Flush( decoder_t * );
static block_t *DecodePacket( decoder_t *, ogg_packet * );
static block_t *SendPacket( decoder_t *, block_t * );
static void ParseSpeexComments( decoder_t *, ogg_packet * );
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_SPEEX )
return VLC_EGENERIC;
/* Allocate the memory needed to store the decoder's structure */
if( ( p_dec->p_sys = p_sys = malloc(sizeof(decoder_sys_t)) ) == NULL )
return VLC_ENOMEM;
p_sys->bits.buf_size = 0;
p_sys->b_packetizer = b_packetizer;
p_sys->rtp_rate = p_dec->fmt_in->audio.i_rate;
p_sys->b_has_headers = false;
date_Set( &p_sys->end_date, VLC_TICK_INVALID );
if( b_packetizer )
{
p_dec->fmt_out.i_codec = VLC_CODEC_SPEEX;
p_dec->pf_packetize = Packetize;
}
else
{
/* Set output properties */
p_dec->fmt_out.i_codec = VLC_CODEC_S16N;
/*
Set callbacks
If the codec is spxr then this decoder is
being invoked on a Speex stream arriving via RTP.
A special decoder callback is used.
*/
if (p_dec->fmt_in->i_original_fourcc == VLC_FOURCC('s', 'p', 'x', 'r'))
{
msg_Dbg( p_dec, "Using RTP version of Speex decoder @ rate %d.",
p_dec->fmt_in->audio.i_rate );
p_dec->pf_decode = DecodeRtpSpeexPacket;
}
else
{
p_dec->pf_decode = DecodeAudio;
}
}
p_dec->pf_flush = Flush;
p_sys->p_state = NULL;
p_sys->p_header = NULL;
p_sys->i_frame_in_packet = 0;
return VLC_SUCCESS;
}
/*****************************************************************************
* OpenDecoder: probe the decoder and return score
*****************************************************************************/
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 );
}
static int CreateDefaultHeader( decoder_t *p_dec )
{
ogg_packet oggpacket;
SpeexHeader *p_header = malloc( sizeof(SpeexHeader) );
if( !p_header )
return VLC_ENOMEM;
const int rate = p_dec->fmt_in->audio.i_rate;
const unsigned i_mode = (rate / 8000) >> 1;
const SpeexMode *mode;
int ret = VLC_SUCCESS;
oggpacket.packet = NULL;
switch( rate )
{
case 8000:
case 16000:
case 32000:
mode = speex_lib_get_mode( i_mode );
break;
default:
msg_Err( p_dec, "Unexpected rate %d", rate );
ret = VLC_EGENERIC;
goto cleanup;
}
speex_init_header( p_header, rate, p_dec->fmt_in->audio.i_channels, mode );
p_header->frames_per_packet = 160 << i_mode;
oggpacket.packet = (unsigned char *) speex_header_to_packet( p_header,
(int *) &oggpacket.bytes );
if( !oggpacket.packet )
{
ret = VLC_ENOMEM;
goto cleanup;
}
oggpacket.b_o_s = 1;
oggpacket.e_o_s = 0;
oggpacket.granulepos = -1;
oggpacket.packetno = 0;
ret = ProcessInitialHeader( p_dec, &oggpacket );
if( ret != VLC_SUCCESS )
{
msg_Err( p_dec, "default Speex header is corrupted" );
}
cleanup:
free( oggpacket.packet );
free( p_header );
return ret;
}
/****************************************************************************
* 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;
block_t *block = *pp_block;
if( block != NULL )
{
if( block->i_flags & (BLOCK_FLAG_CORRUPTED|BLOCK_FLAG_DISCONTINUITY) )
{
Flush( p_dec );
if( block->i_flags & BLOCK_FLAG_CORRUPTED )
{
block_Release( block );
*pp_block = NULL;
return NULL;
}
}
/* Block to Ogg packet */
oggpacket.packet = block->p_buffer;
oggpacket.bytes = 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( !p_dec->fmt_in->p_extra )
{
msg_Warn( p_dec, "Header missing, using default settings" );
if( CreateDefaultHeader( p_dec ) )
{
if( block != NULL )
block_Release( block );
return NULL;
}
}
else if( ProcessHeaders( p_dec ) )
{
if( block != NULL )
block_Release( 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 Speex 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 < 2 )
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( ProcessInitialHeader( p_dec, &oggpacket ) != VLC_SUCCESS )
{
msg_Err( p_dec, "initial Speex header is corrupted" );
return VLC_EGENERIC;
}
/* 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];
ParseSpeexComments( p_dec, &oggpacket );
if( p_sys->b_packetizer )
{
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 );
}
return VLC_SUCCESS;
}
/*****************************************************************************
* ProcessInitialHeader: processes the initial Speex header packet.
*****************************************************************************/
static int ProcessInitialHeader( decoder_t *p_dec, ogg_packet *p_oggpacket )
{
decoder_sys_t *p_sys = p_dec->p_sys;
void *p_state;
SpeexHeader *p_header;
const SpeexMode *p_mode;
SpeexCallback callback;
p_sys->p_header = p_header =
speex_packet_to_header( (char *)p_oggpacket->packet,
p_oggpacket->bytes );
if( !p_header )
{
msg_Err( p_dec, "cannot read Speex header" );
return VLC_EGENERIC;
}
if( p_header->mode >= SPEEX_NB_MODES || p_header->mode < 0 )
{
msg_Err( p_dec, "mode number %d does not (yet/any longer) exist in "
"this version of libspeex.", p_header->mode );
return VLC_EGENERIC;
}
p_mode = speex_mode_list[p_header->mode];
if( p_mode == NULL )
return VLC_EGENERIC;
if( p_header->speex_version_id > 1 )
{
msg_Err( p_dec, "this file was encoded with Speex bit-stream "
"version %d which is not supported by this decoder.",
p_header->speex_version_id );
return VLC_EGENERIC;
}
if( p_mode->bitstream_version < p_header->mode_bitstream_version )
{
msg_Err( p_dec, "file encoded with a newer version of Speex." );
return VLC_EGENERIC;
}
if( p_mode->bitstream_version > p_header->mode_bitstream_version )
{
msg_Err( p_dec, "file encoded with an older version of Speex." );
return VLC_EGENERIC;
}
msg_Dbg( p_dec, "Speex %d Hz audio using %s mode %s%s",
p_header->rate, p_mode->modeName,
( p_header->nb_channels == 1 ) ? " (mono" : " (stereo",
p_header->vbr ? ", VBR)" : ")" );
/* Take care of speex decoder init */
speex_bits_init( &p_sys->bits );
p_sys->p_state = p_state = speex_decoder_init( p_mode );
if( !p_state )
{
msg_Err( p_dec, "decoder initialization failed" );
return VLC_EGENERIC;
}
if( p_header->nb_channels == 2 )
{
SpeexStereoState stereo = SPEEX_STEREO_STATE_INIT;
p_sys->stereo = stereo;
callback.callback_id = SPEEX_INBAND_STEREO;
callback.func = speex_std_stereo_request_handler;
callback.data = &p_sys->stereo;
speex_decoder_ctl( p_state, SPEEX_SET_HANDLER, &callback );
}
if( p_header->nb_channels <= 0 ||
p_header->nb_channels > 5 )
{
msg_Err( p_dec, "invalid number of channels (not between 1 and 5): %i",
p_header->nb_channels );
return VLC_EGENERIC;
}
/* Setup the format */
p_dec->fmt_out.audio.i_physical_channels =
vlc_chan_maps[p_header->nb_channels];
p_dec->fmt_out.audio.i_channels = p_header->nb_channels;
p_dec->fmt_out.audio.i_rate = p_header->rate;
date_Init( &p_sys->end_date, p_header->rate, 1 );
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 Speex 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;
/* Date management */
if( p_block && 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;
}
*pp_block = NULL; /* To avoid being fed the same packet again */
if( p_sys->b_packetizer )
{
if ( p_sys->p_header->frames_per_packet > 1 )
{
short *p_frame_holder = NULL;
int i_bits_before = 0, i_bits_after = 0, i_bytes_in_speex_frame = 0,
i_pcm_output_size = 0, i_bits_in_speex_frame = 0;
block_t *p_new_block = NULL;
i_pcm_output_size = p_sys->p_header->frame_size;
p_frame_holder = (short*)xmalloc( sizeof(short)*i_pcm_output_size );
speex_bits_read_from( &p_sys->bits, (char*)p_oggpacket->packet,
p_oggpacket->bytes);
i_bits_before = speex_bits_remaining( &p_sys->bits );
speex_decode_int(p_sys->p_state, &p_sys->bits, p_frame_holder);
i_bits_after = speex_bits_remaining( &p_sys->bits );
i_bits_in_speex_frame = i_bits_before - i_bits_after;
i_bytes_in_speex_frame = ( i_bits_in_speex_frame +
(8 - (i_bits_in_speex_frame % 8)) )
/ 8;
p_new_block = block_Alloc( i_bytes_in_speex_frame );
memset( p_new_block->p_buffer, 0xff, i_bytes_in_speex_frame );
/*
* Copy the first frame in this packet to a new packet.
*/
speex_bits_rewind( &p_sys->bits );
speex_bits_write( &p_sys->bits,
(char*)p_new_block->p_buffer,
(int)i_bytes_in_speex_frame );
/*
* Move the remaining part of the original packet (subsequent
* frames, if there are any) into the beginning
* of the original packet so
* they are preserved following the realloc.
* Note: Any bits that
* remain in the initial packet
* are "filler" if they do not constitute
* an entire byte.
*/
if ( i_bits_after > 7 )
{
/* round-down since we rounded-up earlier (to include
* the speex terminator code.
*/
i_bytes_in_speex_frame--;
speex_bits_write( &p_sys->bits,
(char*)p_block->p_buffer,
p_block->i_buffer - i_bytes_in_speex_frame );
p_block = block_Realloc( p_block,
0,
p_block->i_buffer-i_bytes_in_speex_frame );
*pp_block = p_block;
}
else
{
speex_bits_reset( &p_sys->bits );
}
free( p_frame_holder );
return SendPacket( p_dec, p_new_block);
}
else
{
return SendPacket( p_dec, p_block );
}
}
else
{
block_t *p_aout_buffer = DecodePacket( p_dec, p_oggpacket );
if( p_block )
block_Release( p_block );
return p_aout_buffer;
}
}
static int DecodeRtpSpeexPacket( decoder_t *p_dec, block_t *p_speex_bit_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_aout_buffer;
int i_decode_ret;
unsigned int i_speex_frame_size;
if ( !p_speex_bit_block || p_speex_bit_block->i_pts == VLC_TICK_INVALID )
return VLCDEC_SUCCESS;
/*
If the SpeexBits buffer size is 0 (a default value),
we know that a proper initialization has not yet been done.
*/
if ( p_sys->bits.buf_size==0 )
{
p_sys->p_header = malloc(sizeof(SpeexHeader));
if ( !p_sys->p_header )
{
msg_Err( p_dec, "Could not allocate a Speex header.");
return VLCDEC_SUCCESS;
}
const SpeexMode *mode = speex_lib_get_mode((p_sys->rtp_rate / 8000) >> 1);
speex_init_header( p_sys->p_header,p_sys->rtp_rate, 1, mode );
speex_bits_init( &p_sys->bits );
p_sys->p_state = speex_decoder_init( mode );
if ( !p_sys->p_state )
{
msg_Err( p_dec, "Could not allocate a Speex decoder." );
free( p_sys->p_header );
return VLCDEC_SUCCESS;
}
/*
Assume that variable bit rate is enabled. Also assume
that there is only one frame per packet.
*/
p_sys->p_header->vbr = 1;
p_sys->p_header->frames_per_packet = 1;
p_dec->fmt_out.audio.i_channels = p_sys->p_header->nb_channels;
p_dec->fmt_out.audio.i_physical_channels =
vlc_chan_maps[p_sys->p_header->nb_channels];
p_dec->fmt_out.audio.i_rate = p_sys->p_header->rate;
if ( speex_mode_query( &speex_nb_mode,
SPEEX_MODE_FRAME_SIZE,
&i_speex_frame_size ) )
{
msg_Err( p_dec, "Could not determine the frame size." );
speex_decoder_destroy( p_sys->p_state );
free( p_sys->p_header );
return VLCDEC_SUCCESS;
}
p_dec->fmt_out.audio.i_bytes_per_frame = i_speex_frame_size;
date_Init(&p_sys->end_date, p_sys->p_header->rate, 1);
}
/*
If the SpeexBits are initialized but there is
still no header, an error must be thrown.
*/
if ( !p_sys->p_header )
{
msg_Err( p_dec, "There is no valid Speex header found." );
return VLCDEC_SUCCESS;
}
if ( date_Get( &p_sys->end_date ) == VLC_TICK_INVALID )
date_Set( &p_sys->end_date, p_speex_bit_block->i_dts );
/*
Ask for a new audio output buffer and make sure
we get one.
*/
if( decoder_UpdateAudioFormat( p_dec ) )
p_aout_buffer = NULL;
else
p_aout_buffer = decoder_NewAudioBuffer( p_dec,
p_sys->p_header->frame_size );
if ( !p_aout_buffer || p_aout_buffer->i_buffer == 0 )
{
msg_Err(p_dec, "Oops: No new buffer was returned!");
return VLCDEC_SUCCESS;
}
/*
Read the Speex payload into the SpeexBits buffer.
*/
speex_bits_read_from( &p_sys->bits,
(char*)p_speex_bit_block->p_buffer,
p_speex_bit_block->i_buffer );
/*
Decode the input and ensure that no errors
were encountered.
*/
i_decode_ret = speex_decode_int( p_sys->p_state, &p_sys->bits,
(int16_t*)p_aout_buffer->p_buffer );
if ( i_decode_ret < 0 )
{
msg_Err( p_dec, "Decoding failed. Perhaps we have a bad stream?" );
return VLCDEC_SUCCESS;
}
/*
Handle date management on the audio output buffer.
*/
p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
p_aout_buffer->i_length = date_Increment( &p_sys->end_date,
p_sys->p_header->frame_size ) - p_aout_buffer->i_pts;
p_sys->i_frame_in_packet++;
block_Release( p_speex_bit_block );
decoder_QueueAudio( p_dec, p_aout_buffer );
return VLCDEC_SUCCESS;
}
/*****************************************************************************
* DecodePacket: decodes a Speex packet.
*****************************************************************************/
static block_t *DecodePacket( decoder_t *p_dec, ogg_packet *p_oggpacket )
{
decoder_sys_t *p_sys = p_dec->p_sys;
if( p_oggpacket->bytes )
{
/* Copy Ogg packet to Speex bitstream */
speex_bits_read_from( &p_sys->bits, (char *)p_oggpacket->packet,
p_oggpacket->bytes );
p_sys->i_frame_in_packet = 0;
}
/* Decode one frame at a time */
if( p_sys->i_frame_in_packet < p_sys->p_header->frames_per_packet )
{
block_t *p_aout_buffer;
if( p_sys->p_header->frame_size == 0 )
return NULL;
if( decoder_UpdateAudioFormat( p_dec ) )
return NULL;
p_aout_buffer =
decoder_NewAudioBuffer( p_dec, p_sys->p_header->frame_size );
if( !p_aout_buffer )
{
return NULL;
}
switch( speex_decode_int( p_sys->p_state, &p_sys->bits,
(int16_t *)p_aout_buffer->p_buffer ) )
{
case -2:
msg_Err( p_dec, "decoding error: corrupted stream?" );
/* fall through */
case -1: /* End of stream */
return NULL;
}
if( speex_bits_remaining( &p_sys->bits ) < 0 )
{
msg_Err( p_dec, "decoding overflow: corrupted stream?" );
}
if( p_sys->p_header->nb_channels == 2 )
speex_decode_stereo_int( (int16_t *)p_aout_buffer->p_buffer,
p_sys->p_header->frame_size,
&p_sys->stereo );
/* Date management */
p_aout_buffer->i_pts = date_Get( &p_sys->end_date );
p_aout_buffer->i_length =
date_Increment( &p_sys->end_date, p_sys->p_header->frame_size )
- p_aout_buffer->i_pts;
p_sys->i_frame_in_packet++;
return p_aout_buffer;
}
else
{
return NULL;
}
}
/*****************************************************************************
* SendPacket: send an ogg packet to the stream output.
*****************************************************************************/
static block_t *SendPacket( decoder_t *p_dec, block_t *p_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
/* 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,
p_sys->p_header->frame_size ) -
p_block->i_pts;
return p_block;
}
/*****************************************************************************
* ParseSpeexComments:
*****************************************************************************/
static void ParseSpeexComments( decoder_t *p_dec, ogg_packet *p_oggpacket )
{
decoder_sys_t *p_sys = p_dec->p_sys;
const SpeexMode *p_mode;
assert( p_sys->p_header->mode < SPEEX_NB_MODES );
p_mode = speex_mode_list[p_sys->p_header->mode];
assert( p_mode != NULL );
if( !p_dec->p_description )
{
p_dec->p_description = vlc_meta_New();
if( !p_dec->p_description )
return;
}
/* */
char *psz_mode;
if( asprintf( &psz_mode, "%s%s", p_mode->modeName, p_sys->p_header->vbr ? " VBR" : "" ) >= 0 )
{
vlc_meta_SetExtra( p_dec->p_description, _("Mode"), psz_mode );
free( psz_mode );
}
/* TODO: finish comments parsing */
VLC_UNUSED( p_oggpacket );
}
/*****************************************************************************
* CloseDecoder: speex 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->p_state )
{
speex_decoder_destroy( p_sys->p_state );
speex_bits_destroy( &p_sys->bits );
}
free( p_sys->p_header );
free( p_sys );
}
#ifdef ENABLE_SOUT
/*****************************************************************************
* encoder_sys_t: encoder descriptor
*****************************************************************************/
#define MAX_FRAME_BYTES 2000
typedef struct
{
/*
* Input properties
*/
char *p_buffer;
char p_buffer_out[MAX_FRAME_BYTES];
/*
* Speex properties
*/
SpeexBits bits;
SpeexHeader header;
SpeexStereoState stereo;
void *p_state;
int i_frames_per_packet;
int i_frames_in_packet;
int i_frame_length;
int i_samples_delay;
int i_frame_size;
} encoder_sys_t;
static block_t *Encode ( encoder_t *, block_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;
const SpeexMode *p_speex_mode = &speex_nb_mode;
int i_tmp, i;
const char *pp_header[2];
int pi_header[2];
uint8_t *p_extra;
if( p_enc->fmt_out.i_codec != VLC_CODEC_SPEEX &&
!p_enc->obj.force )
{
return VLC_EGENERIC;
}
config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
switch( var_GetInteger( p_enc, ENC_CFG_PREFIX "mode" ) )
{
case 1:
msg_Dbg( p_enc, "Using wideband" );
p_speex_mode = &speex_wb_mode;
break;
case 2:
msg_Dbg( p_enc, "Using ultra-wideband" );
p_speex_mode = &speex_uwb_mode;
break;
default:
msg_Dbg( p_enc, "Using narrowband" );
p_speex_mode = &speex_nb_mode;
break;
}
/* 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->fmt_in.i_codec = VLC_CODEC_S16N;
p_enc->fmt_out.i_codec = VLC_CODEC_SPEEX;
speex_init_header( &p_sys->header, p_enc->fmt_in.audio.i_rate,
1, p_speex_mode );
p_sys->header.frames_per_packet = 1;
p_sys->header.vbr = var_GetBool( p_enc, ENC_CFG_PREFIX "cbr" ) ? 0 : 1;
p_sys->header.nb_channels = p_enc->fmt_in.audio.i_channels;
/* Create a new encoder state in narrowband mode */
p_sys->p_state = speex_encoder_init( p_speex_mode );
/* Parameters */
i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX "complexity" );
speex_encoder_ctl( p_sys->p_state, SPEEX_SET_COMPLEXITY, &i_tmp );
i_tmp = var_GetBool( p_enc, ENC_CFG_PREFIX "cbr" ) ? 0 : 1;
speex_encoder_ctl( p_sys->p_state, SPEEX_SET_VBR, &i_tmp );
if( i_tmp == 0 ) /* CBR */
{
i_tmp = var_GetFloat( p_enc, ENC_CFG_PREFIX "quality" );
speex_encoder_ctl( p_sys->p_state, SPEEX_SET_QUALITY, &i_tmp );
i_tmp = var_GetBool( p_enc, ENC_CFG_PREFIX "vad" ) ? 1 : 0;
speex_encoder_ctl( p_sys->p_state, SPEEX_SET_VAD, &i_tmp );
}
else
{
float f_tmp;
f_tmp = var_GetFloat( p_enc, ENC_CFG_PREFIX "quality" );
speex_encoder_ctl( p_sys->p_state, SPEEX_SET_VBR_QUALITY, &f_tmp );
i_tmp = var_GetInteger( p_enc, ENC_CFG_PREFIX "max-bitrate" );
if( i_tmp > 0 )
#ifdef SPEEX_SET_VBR_MAX_BITRATE
speex_encoder_ctl( p_sys->p_state, SPEEX_SET_VBR_MAX_BITRATE, &i_tmp );
#else
msg_Dbg( p_enc, "max-bitrate cannot be set in this version of libspeex");
#endif
}
i_tmp = var_GetBool( p_enc, ENC_CFG_PREFIX "dtx" ) ? 1 : 0;
speex_encoder_ctl( p_sys->p_state, SPEEX_SET_DTX, &i_tmp );
/*Initialization of the structure that holds the bits*/
speex_bits_init( &p_sys->bits );
p_sys->i_frames_in_packet = 0;
p_sys->i_samples_delay = 0;
speex_encoder_ctl( p_sys->p_state, SPEEX_GET_FRAME_SIZE,
&p_sys->i_frame_length );
p_sys->i_frame_size = p_sys->i_frame_length *
sizeof(int16_t) * p_enc->fmt_in.audio.i_channels;
p_sys->p_buffer = xmalloc( p_sys->i_frame_size );
/* Create and store headers */
pp_header[0] = speex_header_to_packet( &p_sys->header, &pi_header[0] );
pp_header[1] = "ENCODER=VLC media player";
pi_header[1] = sizeof("ENCODER=VLC media player");
p_enc->fmt_out.i_extra = 3 * 2 + pi_header[0] + pi_header[1];
p_extra = p_enc->fmt_out.p_extra = xmalloc( p_enc->fmt_out.i_extra );
for( i = 0; i < 2; i++ )
{
*(p_extra++) = pi_header[i] >> 8;
*(p_extra++) = pi_header[i] & 0xFF;
memcpy( p_extra, pp_header[i], pi_header[i] );
p_extra += pi_header[i];
}
static const struct vlc_encoder_operations ops =
{
.close = CloseEncoder,
.encode_audio = Encode,
};
p_enc->ops = &ops;
msg_Dbg( p_enc, "encoding: frame size:%d, channels:%d, samplerate:%d",
p_sys->i_frame_size, p_enc->fmt_in.audio.i_channels,
p_enc->fmt_in.audio.i_rate );
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;
block_t *p_block, *p_chain = NULL;
/* Encoder gets NULL when it's time to flush */
if( unlikely( !p_aout_buf ) ) return NULL;
unsigned char *p_buffer = p_aout_buf->p_buffer;
unsigned i_samples = p_aout_buf->i_nb_samples;
int i_samples_delay = p_sys->i_samples_delay;
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 += i_samples;
while( p_sys->i_samples_delay >= p_sys->i_frame_length )
{
int16_t *p_samples;
int i_out;
if( i_samples_delay )
{
/* Take care of the left-over from last time */
int i_delay_size = i_samples_delay * 2 *
p_enc->fmt_in.audio.i_channels;
int i_size = p_sys->i_frame_size - i_delay_size;
p_samples = (int16_t *)p_sys->p_buffer;
memcpy( p_sys->p_buffer + i_delay_size, p_buffer, i_size );
p_buffer -= i_delay_size;
i_samples += i_samples_delay;
i_samples_delay = 0;
}
else
{
p_samples = (int16_t *)p_buffer;
}
/* Encode current frame */
if( p_enc->fmt_in.audio.i_channels == 2 )
speex_encode_stereo_int( p_samples, p_sys->i_frame_length,
&p_sys->bits );
#if 0
if( p_sys->preprocess )
speex_preprocess( p_sys->preprocess, p_samples, NULL );
#endif
speex_encode_int( p_sys->p_state, p_samples, &p_sys->bits );
p_buffer += p_sys->i_frame_size;
p_sys->i_samples_delay -= p_sys->i_frame_length;
i_samples -= p_sys->i_frame_length;
p_sys->i_frames_in_packet++;
if( p_sys->i_frames_in_packet < p_sys->header.frames_per_packet )
continue;
p_sys->i_frames_in_packet = 0;
speex_bits_insert_terminator( &p_sys->bits );
i_out = speex_bits_write( &p_sys->bits, p_sys->p_buffer_out,
MAX_FRAME_BYTES );
speex_bits_reset( &p_sys->bits );
p_block = block_Alloc( i_out );
memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
p_block->i_length = vlc_tick_from_samples(
p_sys->i_frame_length * p_sys->header.frames_per_packet,
p_enc->fmt_in.audio.i_rate );
p_block->i_dts = p_block->i_pts = i_pts;
/* Update pts */
i_pts += p_block->i_length;
block_ChainAppend( &p_chain, p_block );
}
/* Backup the remaining raw samples */
if( i_samples )
{
memcpy( p_sys->p_buffer + i_samples_delay * 2 *
p_enc->fmt_in.audio.i_channels, p_buffer,
i_samples * 2 * p_enc->fmt_in.audio.i_channels );
}
return p_chain;
}
/*****************************************************************************
* CloseEncoder: encoder destruction
*****************************************************************************/
static void CloseEncoder( encoder_t *p_enc )
{
encoder_sys_t *p_sys = p_enc->p_sys;
speex_encoder_destroy( p_sys->p_state );
speex_bits_destroy( &p_sys->bits );
free( p_sys->p_buffer );
free( p_sys );
}
#endif