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* configure.ac.in, modules/audio_filter/converter/*: added a s8tofloat32.c and 

u8tofloat32.c converter.
* modules/codec/araw.c: modified to also decode u8 pcm audio samples.
This commit is contained in:
Gildas Bazin 2002-11-08 14:23:49 +00:00
parent d532cf3cad
commit 3c60cbd66f
5 changed files with 198 additions and 3 deletions
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2
configure.ac.in
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@ -552,7 +552,7 @@ PLUGINS="${PLUGINS} idct idctclassic motion mpeg_video spudec mpeg_audio"
#PLUGINS="${PLUGINS} a52old imdct downmix"
PLUGINS="${PLUGINS} lpcm a52"
PLUGINS="${PLUGINS} deinterlace invert yuv wall transform distort clone crop motionblur"
PLUGINS="${PLUGINS} float32tos16 float32tos8 float32tou16 float32tou8 a52tospdif fixed32tofloat32 fixed32tos16 s16tofloat32 s16tofloat32swab"
PLUGINS="${PLUGINS} float32tos16 float32tos8 float32tou16 float32tou8 a52tospdif fixed32tofloat32 fixed32tos16 s16tofloat32 s16tofloat32swab s8tofloat32 u8tofloat32"
PLUGINS="${PLUGINS} trivial_resampler ugly_resampler linear_resampler"
PLUGINS="${PLUGINS} trivial_channel_mixer"
PLUGINS="${PLUGINS} trivial_mixer spdif_mixer"

2
modules/audio_filter/converter/Modules.am
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@ -8,3 +8,5 @@ SOURCES_fixed32tos16 = modules/audio_filter/converter/fixed32tos16.c
SOURCES_fixed32tofloat32 = modules/audio_filter/converter/fixed32tofloat32.c
SOURCES_s16tofloat32 = modules/audio_filter/converter/s16tofloat32.c
SOURCES_s16tofloat32swab = modules/audio_filter/converter/s16tofloat32swab.c
SOURCES_s8tofloat32 = modules/audio_filter/converter/s8tofloat32.c
SOURCES_u8tofloat32 = modules/audio_filter/converter/u8tofloat32.c

96
modules/audio_filter/converter/s8tofloat32.c Normal file
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@ -0,0 +1,96 @@
/*****************************************************************************
* s8tofloat32.c : converter from signed 8 bits integer to float32.
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: s8tofloat32.c,v 1.1 2002/11/08 14:23:49 gbazin Exp $
*
* Authors: Gildas Bazin <gbazin@netcourrier.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <errno.h>
#include <stdlib.h> /* malloc(), free() */
#include <string.h>
#include <vlc/vlc.h>
#include "audio_output.h"
#include "aout_internal.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
aout_buffer_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("audio filter for s8->float32 conversion") );
set_capability( "audio filter", 1 );
set_callbacks( Create, NULL );
vlc_module_end();
/*****************************************************************************
* Create: create and initialize converter
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
aout_filter_t * p_filter = (aout_filter_t *)p_this;
if ( p_filter->input.i_format != VLC_FOURCC('s','8',' ',' ')
|| p_filter->output.i_format != VLC_FOURCC('f','l','3','2') )
{
return -1;
}
if ( !AOUT_FMTS_SIMILAR( &p_filter->input, &p_filter->output ) )
{
return -1;
}
p_filter->pf_do_work = DoWork;
p_filter->b_in_place = VLC_TRUE;
return 0;
}
/*****************************************************************************
* DoWork: convert a buffer
*****************************************************************************/
static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
{
int i = p_in_buf->i_nb_samples * aout_FormatNbChannels( &p_filter->input );
/* We start from the end because b_in_place is true */
s8 * p_in = (s8 *)p_in_buf->p_buffer + i - 1;
float * p_out = (float *)p_out_buf->p_buffer + i - 1;
while( i-- )
{
*p_out = (float)(*p_in) / 128.0;
p_in--; p_out--;
}
p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
p_out_buf->i_nb_bytes = p_in_buf->i_nb_bytes * sizeof(float);
}

96
modules/audio_filter/converter/u8tofloat32.c Normal file
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@ -0,0 +1,96 @@
/*****************************************************************************
* u8tofloat32.c : converter from unsigned 8 bits integer to float32.
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: u8tofloat32.c,v 1.1 2002/11/08 14:23:49 gbazin Exp $
*
* Authors: Gildas Bazin <gbazin@netcourrier.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <errno.h>
#include <stdlib.h> /* malloc(), free() */
#include <string.h>
#include <vlc/vlc.h>
#include "audio_output.h"
#include "aout_internal.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
aout_buffer_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("audio filter for s8->float32 conversion") );
set_capability( "audio filter", 1 );
set_callbacks( Create, NULL );
vlc_module_end();
/*****************************************************************************
* Create: create and initialize converter
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
aout_filter_t * p_filter = (aout_filter_t *)p_this;
if ( p_filter->input.i_format != VLC_FOURCC('u','8',' ',' ')
|| p_filter->output.i_format != VLC_FOURCC('f','l','3','2') )
{
return -1;
}
if ( !AOUT_FMTS_SIMILAR( &p_filter->input, &p_filter->output ) )
{
return -1;
}
p_filter->pf_do_work = DoWork;
p_filter->b_in_place = VLC_TRUE;
return 0;
}
/*****************************************************************************
* DoWork: convert a buffer
*****************************************************************************/
static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
{
int i = p_in_buf->i_nb_samples * aout_FormatNbChannels( &p_filter->input );
/* We start from the end because b_in_place is true */
u8 * p_in = (u8 *)p_in_buf->p_buffer + i - 1;
float * p_out = (float *)p_out_buf->p_buffer + i - 1;
while( i-- )
{
*p_out = ((float)*p_in -128) / 128.0;
p_in--; p_out--;
}
p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
p_out_buf->i_nb_bytes = p_in_buf->i_nb_bytes * sizeof(float);
}

5
modules/codec/araw.c
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@ -2,7 +2,7 @@
* araw.c: Pseudo audio decoder; for raw pcm data
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: araw.c,v 1.5 2002/10/27 16:58:14 gbazin Exp $
* $Id: araw.c,v 1.6 2002/11/08 14:23:49 gbazin Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
@ -233,8 +233,9 @@ static int InitThread( adec_thread_t * p_adec )
case( 4 ):
p_adec->output_format.i_format = VLC_FOURCC('s','3','2','l');
break;
case( 1 ):
p_adec->output_format.i_format = VLC_FOURCC('u','8',' ',' ');
break;
default:
msg_Err( p_adec->p_fifo, "bad parameters(bits/sample)" );
return( -1 );