Interleave.hxx

/*
 * Copyright 2003-2017 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.
 */

#ifndef MPD_PCM_INTERLEAVE_HXX
#define MPD_PCM_INTERLEAVE_HXX

#include "check.h"
#include "Compiler.h"
#include "util/ConstBuffer.hxx"

#include <stdint.h>

/**
 * Interleave planar PCM samples from #src to #dest.
 */
void
PcmInterleave(void *gcc_restrict dest, ConstBuffer<const void *> src,
	      size_t n_frames, size_t sample_size);

/**
 * A variant of PcmInterleave() that assumes 32 bit samples (4 bytes
 * per sample).
 */
void
PcmInterleave32(int32_t *gcc_restrict dest, ConstBuffer<const int32_t *> src,
		size_t n_frames);

static inline void
PcmInterleaveFloat(float *gcc_restrict dest, ConstBuffer<const float *> src,
		   size_t n_frames)
{
	PcmInterleave32((int32_t *)dest,
			ConstBuffer<const int32_t *>((const int32_t *const*)src.data,
						      src.size),
			n_frames);
}

#endif