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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.
+ */
+
+#ifndef MPD_PCM_RESAMPLE_HXX
+#define MPD_PCM_RESAMPLE_HXX
+
+#include "check.h"
+#include "pcm_buffer.h"
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#ifdef HAVE_LIBSAMPLERATE
+#include <samplerate.h>
+#endif
+
+/**
+ * This object is statically allocated (within another struct), and
+ * holds buffer allocations and the state for the resampler.
+ */
+struct PcmResampler {
+#ifdef HAVE_LIBSAMPLERATE
+ SRC_STATE *state;
+ SRC_DATA data;
+
+ struct pcm_buffer in, out;
+
+ struct {
+ unsigned src_rate;
+ unsigned dest_rate;
+ unsigned channels;
+ } prev;
+
+ int error;
+#endif
+
+ struct pcm_buffer buffer;
+
+ PcmResampler();
+ ~PcmResampler();
+
+ /**
+ * @see pcm_convert_reset()
+ */
+ void Reset();
+
+ /**
+ * Resamples 32 bit float data.
+ *
+ * @param channels the number of channels
+ * @param src_rate the source sample rate
+ * @param src the source PCM buffer
+ * @param src_size the size of #src in bytes
+ * @param dest_rate the requested destination sample rate
+ * @param dest_size_r returns the number of bytes of the destination buffer
+ * @return the destination buffer
+ */
+ const float *ResampleFloat(unsigned channels, unsigned src_rate,
+ const float *src_buffer, size_t src_size,
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r);
+
+ /**
+ * Resamples 16 bit PCM data.
+ *
+ * @param channels the number of channels
+ * @param src_rate the source sample rate
+ * @param src the source PCM buffer
+ * @param src_size the size of #src in bytes
+ * @param dest_rate the requested destination sample rate
+ * @param dest_size_r returns the number of bytes of the destination buffer
+ * @return the destination buffer
+ */
+ const int16_t *Resample16(unsigned channels, unsigned src_rate,
+ const int16_t *src_buffer, size_t src_size,
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r);
+
+ /**
+ * Resamples 32 bit PCM data.
+ *
+ * @param channels the number of channels
+ * @param src_rate the source sample rate
+ * @param src the source PCM buffer
+ * @param src_size the size of #src in bytes
+ * @param dest_rate the requested destination sample rate
+ * @param dest_size_r returns the number of bytes of the destination buffer
+ * @return the destination buffer
+ */
+ const int32_t *Resample32(unsigned channels, unsigned src_rate,
+ const int32_t *src_buffer, size_t src_size,
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r);
+
+ /**
+ * Resamples 24 bit PCM data.
+ *
+ * @param channels the number of channels
+ * @param src_rate the source sample rate
+ * @param src the source PCM buffer
+ * @param src_size the size of #src in bytes
+ * @param dest_rate the requested destination sample rate
+ * @param dest_size_r returns the number of bytes of the destination buffer
+ * @return the destination buffer
+ */
+ const int32_t *Resample24(unsigned channels, unsigned src_rate,
+ const int32_t *src_buffer, size_t src_size,
+ unsigned dest_rate, size_t *dest_size_r,
+ GError **error_r)
+ {
+ /* reuse the 32 bit code - the resampler code doesn't care if
+ the upper 8 bits are actually used */
+ return Resample32(channels, src_rate, src_buffer, src_size,
+ dest_rate, dest_size_r, error_r);
+ }
+};
+
+bool
+pcm_resample_global_init(GError **error_r);
+
+#endif