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pcm_resample.h
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/*
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* Copyright (C) 2003-2010 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_PCM_RESAMPLE_H
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#define MPD_PCM_RESAMPLE_H
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#include "
check.h
"
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#include "
pcm_buffer.h
"
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#ifdef HAVE_LIBSAMPLERATE
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#include <samplerate.h>
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#endif
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struct
pcm_resample_state
{
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#ifdef HAVE_LIBSAMPLERATE
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SRC_STATE *state;
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SRC_DATA data;
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struct
pcm_buffer
in, out;
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struct
{
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unsigned
src_rate;
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unsigned
dest_rate;
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uint8_t channels;
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} prev;
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int
error;
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#endif
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struct
pcm_buffer
buffer
;
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};
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void
pcm_resample_init
(
struct
pcm_resample_state
*state);
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void
pcm_resample_deinit
(
struct
pcm_resample_state
*state);
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const
int16_t *
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pcm_resample_16
(
struct
pcm_resample_state
*state,
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uint8_t channels,
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unsigned
src_rate,
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const
int16_t *src_buffer,
size_t
src_size,
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unsigned
dest_rate,
size_t
*dest_size_r,
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GError **error_r);
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const
int32_t *
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pcm_resample_32
(
struct
pcm_resample_state
*state,
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uint8_t channels,
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unsigned
src_rate,
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const
int32_t *src_buffer,
size_t
src_size,
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unsigned
dest_rate,
size_t
*dest_size_r,
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GError **error_r);
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static
inline
const
int32_t *
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pcm_resample_24
(
struct
pcm_resample_state
*state,
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uint8_t channels,
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unsigned
src_rate,
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const
int32_t *src_buffer,
size_t
src_size,
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unsigned
dest_rate,
size_t
*dest_size_r,
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GError **error_r)
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{
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/* reuse the 32 bit code - the resampler code doesn't care if
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the upper 8 bits are actually used */
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return
pcm_resample_32
(state, channels,
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src_rate, src_buffer, src_size,
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dest_rate, dest_size_r, error_r);
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}
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#endif
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