pcm_resample: convert to C++

1 files changed, 153 insertions, 0 deletions

diff --git a/src/pcm/PcmResample.cxx b/src/pcm/PcmResample.cxx
new file mode 100644
index 000000000..60265380e
--- /dev/null
+++ b/src/pcm/PcmResample.cxx
@@ -0,0 +1,153 @@
+/*
+ * 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 "conf.h"
+#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(GError **error_r)
+{
+#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_r);
+	else
+		return true;
+#else
+	(void)error_r;
+	return true;
+#endif
+}
+
+PcmResampler::PcmResampler()
+{
+#ifdef HAVE_LIBSAMPLERATE
+	if (pcm_resample_lsr_enabled())
+		pcm_resample_lsr_init(this);
+	else
+#endif
+		pcm_resample_fallback_init(this);
+}
+
+PcmResampler::~PcmResampler()
+{
+#ifdef HAVE_LIBSAMPLERATE
+	if (pcm_resample_lsr_enabled())
+		pcm_resample_lsr_deinit(this);
+	else
+#endif
+		pcm_resample_fallback_deinit(this);
+}
+
+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,
+			    GError **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(this, 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,
+			 GError **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(this, 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,
+			 GError **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(this, channels,
+					src_rate, src_buffer, src_size,
+					dest_rate, dest_size_r);
+}