Commit 59987d76 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont
Browse files

endian: endian conversion code from format

parent add4be43
......@@ -51,10 +51,12 @@ SOURCES_a52tofloat32 = converter/a52tofloat32.c
SOURCES_dtstospdif = converter/dtstospdif.c
SOURCES_dtstofloat32 = converter/dtstofloat32.c
SOURCES_mpgatofixed32 = converter/mpgatofixed32.c
SOURCES_audio_endian = converter/endian.c
SOURCES_audio_format = converter/format.c
libvlc_LTLIBRARIES += \
liba52tospdif_plugin.la \
libaudio_endian_plugin.la \
libaudio_format_plugin.la \
libdtstospdif_plugin.la
......
/*****************************************************************************
* endian.c : PCM endian converter
*****************************************************************************
* Copyright (C) 2002-2005 VLC authors and VideoLAN
* Copyright (C) 2010 Laurent Aimar
* Copyright (C) 2012 Rémi Denis-Courmont
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
* Laurent Aimar <fenrir _AT_ videolan _DOT_ 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.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_aout.h>
#include <vlc_block.h>
#include <vlc_filter.h>
static int Open(vlc_object_t *);
vlc_module_begin()
set_description(N_("Audio filter for endian conversion"))
set_category(CAT_AUDIO)
set_subcategory(SUBCAT_AUDIO_MISC)
set_capability("audio converter", 2)
set_callbacks(Open, NULL)
vlc_module_end()
static block_t *Filter16(filter_t *filter, block_t *block)
{
uint16_t *data = (uint16_t *)block->p_buffer;
for (size_t i = 0; i < block->i_buffer / 2; i++)
data[i] = bswap16 (data[i]);
(void) filter;
return block;
}
static block_t *Filter24(filter_t *filter, block_t *block)
{
uint8_t *data = (uint8_t *)block->p_buffer;
for (size_t i = 0; i < block->i_buffer; i += 3) {
uint8_t buf = data[i];
data[i] = data[i + 2];
data[i + 2] = buf;
}
(void) filter;
return block;
}
static block_t *Filter32(filter_t *filter, block_t *block)
{
uint32_t *data = (uint32_t *)block->p_buffer;
for (size_t i = 0; i < block->i_buffer / 4; i++)
data[i] = bswap32 (data[i]);
(void) filter;
return block;
}
static block_t *Filter64(filter_t *filter, block_t *block)
{
uint64_t *data = (uint64_t *)block->p_buffer;
for (size_t i = 0; i < block->i_buffer / 8; i++)
data[i] = bswap64 (data[i]);
(void) filter;
return block;
}
static const vlc_fourcc_t list[][2] = {
{ VLC_CODEC_F64B, VLC_CODEC_F64L },
{ VLC_CODEC_F32B, VLC_CODEC_F32L },
{ VLC_CODEC_S16B, VLC_CODEC_S16L },
{ VLC_CODEC_S24B, VLC_CODEC_S24L },
{ VLC_CODEC_S32B, VLC_CODEC_S32L },
{ VLC_CODEC_S16B, VLC_CODEC_S16L },
{ VLC_CODEC_S24B, VLC_CODEC_S24L },
{ VLC_CODEC_S32B, VLC_CODEC_S32L },
};
static int Open(vlc_object_t *object)
{
filter_t *filter = (filter_t *)object;
const audio_sample_format_t *src = &filter->fmt_in.audio;
const audio_sample_format_t *dst = &filter->fmt_out.audio;
if (!AOUT_FMTS_SIMILAR(src, dst))
return VLC_EGENERIC;
for (size_t i = 0; i < sizeof (list) / sizeof (list[0]); i++) {
if (src->i_format == list[i][0]) {
if (dst->i_format != list[i][1])
goto ok;
break;
}
if (src->i_format == list[i][1]) {
if (dst->i_format == list[i][0])
goto ok;
break;
}
}
return VLC_EGENERIC;
ok:
switch (src->i_bitspersample) {
case 16:
filter->pf_audio_filter = Filter16;
break;
case 24:
filter->pf_audio_filter = Filter24;
break;
case 32:
filter->pf_audio_filter = Filter32;
break;
case 64:
filter->pf_audio_filter = Filter64;
break;
}
return VLC_SUCCESS;
}
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