pcm_convert: convert to C++

1 files changed, 114 insertions, 0 deletions

diff --git a/src/PcmConvert.hxx b/src/PcmConvert.hxx
new file mode 100644
index 000000000..bec30af45
--- /dev/null
+++ b/src/PcmConvert.hxx
@@ -0,0 +1,114 @@
+/*
+ * 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 PCM_CONVERT_HXX
+#define PCM_CONVERT_HXX
+
+extern "C" {
+#include "pcm_dsd.h"
+#include "pcm_resample.h"
+#include "pcm_dither.h"
+#include "pcm_buffer.h"
+}
+
+#include <glib.h>
+
+struct audio_format;
+
+/**
+ * This object is statically allocated (within another struct), and
+ * holds buffer allocations and the state for all kinds of PCM
+ * conversions.
+ */
+class PcmConvert {
+	struct pcm_dsd dsd;
+
+	struct pcm_resample_state resample;
+
+	struct pcm_dither dither;
+
+	/** the buffer for converting the sample format */
+	struct pcm_buffer format_buffer;
+
+	/** the buffer for converting the channel count */
+	struct pcm_buffer channels_buffer;
+
+public:
+	PcmConvert();
+	~PcmConvert();
+
+
+	/**
+	 * Reset the pcm_convert_state object.  Use this at the
+	 * boundary between two distinct songs and each time the
+	 * format changes.
+	 */
+	void Reset();
+
+	/**
+	 * Converts PCM data between two audio formats.
+	 *
+	 * @param src_format the source audio format
+	 * @param src the source PCM buffer
+	 * @param src_size the size of #src in bytes
+	 * @param dest_format the requested destination audio format
+	 * @param dest_size_r returns the number of bytes of the destination buffer
+	 * @param error_r location to store the error occurring, or NULL to
+	 * ignore errors
+	 * @return the destination buffer, or NULL on error
+	 */
+	const void *Convert(const audio_format *src_format,
+			    const void *src, size_t src_size,
+			    const audio_format *dest_format,
+			    size_t *dest_size_r,
+			    GError **error_r);
+
+private:
+	const int16_t *Convert16(const audio_format *src_format,
+				 const void *src_buffer, size_t src_size,
+				 const audio_format *dest_format,
+				 size_t *dest_size_r,
+				 GError **error_r);
+
+	const int32_t *Convert24(const audio_format *src_format,
+				 const void *src_buffer, size_t src_size,
+				 const audio_format *dest_format,
+				 size_t *dest_size_r,
+				 GError **error_r);
+
+	const int32_t *Convert32(const audio_format *src_format,
+				 const void *src_buffer, size_t src_size,
+				 const audio_format *dest_format,
+				 size_t *dest_size_r,
+				 GError **error_r);
+
+	const float *ConvertFloat(const audio_format *src_format,
+				  const void *src_buffer, size_t src_size,
+				  const audio_format *dest_format,
+				  size_t *dest_size_r,
+				  GError **error_r);
+};
+
+static inline GQuark
+pcm_convert_quark(void)
+{
+	return g_quark_from_static_string("pcm_convert");
+}
+
+#endif