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/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "PcmResampleInternal.hxx"
#ifdef HAVE_LIBSAMPLERATE
#include "ConfigGlobal.hxx"
#include "ConfigOption.hxx"
#endif
#include <string.h>
#ifdef HAVE_LIBSAMPLERATE
static bool lsr_enabled;
#endif
#ifdef HAVE_LIBSAMPLERATE
static bool
pcm_resample_lsr_enabled(void)
{
return lsr_enabled;
}
#endif
bool
pcm_resample_global_init(Error &error)
{
#ifdef HAVE_LIBSAMPLERATE
const char *converter =
config_get_string(CONF_SAMPLERATE_CONVERTER, "");
lsr_enabled = strcmp(converter, "internal") != 0;
if (lsr_enabled)
return pcm_resample_lsr_global_init(converter, error);
else
return true;
#else
(void)error;
return true;
#endif
}
PcmResampler::PcmResampler()
{
#ifdef HAVE_LIBSAMPLERATE
if (pcm_resample_lsr_enabled())
pcm_resample_lsr_init(this);
#endif
}
PcmResampler::~PcmResampler()
{
#ifdef HAVE_LIBSAMPLERATE
if (pcm_resample_lsr_enabled())
pcm_resample_lsr_deinit(this);
#endif
}
void
PcmResampler::Reset()
{
#ifdef HAVE_LIBSAMPLERATE
pcm_resample_lsr_reset(this);
#endif
}
const float *
PcmResampler::ResampleFloat(unsigned channels, unsigned src_rate,
const float *src_buffer, size_t src_size,
unsigned dest_rate, size_t *dest_size_r,
Error &error_r)
{
#ifdef HAVE_LIBSAMPLERATE
if (pcm_resample_lsr_enabled())
return pcm_resample_lsr_float(this, channels,
src_rate, src_buffer, src_size,
dest_rate, dest_size_r,
error_r);
#else
(void)error_r;
#endif
/* sizeof(float)==sizeof(int32_t); the fallback resampler does
not do any math on the sample values, so this hack is
possible: */
return (const float *)
pcm_resample_fallback_32(buffer, channels,
src_rate, (const int32_t *)src_buffer,
src_size,
dest_rate, dest_size_r);
}
const int16_t *
PcmResampler::Resample16(unsigned channels,
unsigned src_rate, const int16_t *src_buffer, size_t src_size,
unsigned dest_rate, size_t *dest_size_r,
Error &error_r)
{
#ifdef HAVE_LIBSAMPLERATE
if (pcm_resample_lsr_enabled())
return pcm_resample_lsr_16(this, channels,
src_rate, src_buffer, src_size,
dest_rate, dest_size_r,
error_r);
#else
(void)error_r;
#endif
return pcm_resample_fallback_16(buffer, channels,
src_rate, src_buffer, src_size,
dest_rate, dest_size_r);
}
const int32_t *
PcmResampler::Resample32(unsigned channels, unsigned src_rate,
const int32_t *src_buffer, size_t src_size,
unsigned dest_rate, size_t *dest_size_r,
Error &error_r)
{
#ifdef HAVE_LIBSAMPLERATE
if (pcm_resample_lsr_enabled())
return pcm_resample_lsr_32(this, channels,
src_rate, src_buffer, src_size,
dest_rate, dest_size_r,
error_r);
#else
(void)error_r;
#endif
return pcm_resample_fallback_32(buffer, channels,
src_rate, src_buffer, src_size,
dest_rate, dest_size_r);
}
const int32_t *
PcmResampler::Resample24(unsigned channels, unsigned src_rate,
const int32_t *src_buffer, size_t src_size,
unsigned dest_rate, size_t *dest_size_r,
Error &error_r)
{
#ifdef HAVE_LIBSAMPLERATE
if (pcm_resample_lsr_enabled())
return pcm_resample_lsr_24(this, channels,
src_rate, src_buffer, src_size,
dest_rate, dest_size_r,
error_r);
#else
(void)error_r;
#endif
/* reuse the 32 bit code - the resampler code doesn't care if
the upper 8 bits are actually used */
return pcm_resample_fallback_32(buffer, channels,
src_rate, src_buffer, src_size,
dest_rate, dest_size_r);
}
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