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-rw-r--r--src/pcm/GlueResampler.cxx85
1 files changed, 85 insertions, 0 deletions
diff --git a/src/pcm/GlueResampler.cxx b/src/pcm/GlueResampler.cxx
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+++ b/src/pcm/GlueResampler.cxx
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+/*
+ * Copyright (C) 2003-2014 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 "GlueResampler.hxx"
+#include "ConfiguredResampler.hxx"
+#include "Resampler.hxx"
+
+#include <assert.h>
+
+GluePcmResampler::GluePcmResampler()
+ :resampler(pcm_resampler_create()) {}
+
+GluePcmResampler::~GluePcmResampler()
+{
+ delete resampler;
+}
+
+bool
+GluePcmResampler::Open(AudioFormat src_format, unsigned new_sample_rate,
+ Error &error)
+{
+ assert(src_format.IsValid());
+ assert(audio_valid_sample_rate(new_sample_rate));
+
+ AudioFormat requested_format = src_format;
+ AudioFormat dest_format = resampler->Open(requested_format,
+ new_sample_rate,
+ error);
+ if (!dest_format.IsValid())
+ return false;
+
+ assert(requested_format.channels == src_format.channels);
+ assert(dest_format.channels == src_format.channels);
+ assert(dest_format.sample_rate == new_sample_rate);
+
+ if (requested_format.format != src_format.format &&
+ !format_converter.Open(src_format.format, requested_format.format,
+ error))
+ return false;
+
+ src_sample_format = src_format.format;
+ requested_sample_format = requested_format.format;
+ output_sample_format = dest_format.format;
+ return true;
+}
+
+void
+GluePcmResampler::Close()
+{
+ if (requested_sample_format != src_sample_format)
+ format_converter.Close();
+
+ resampler->Close();
+}
+
+ConstBuffer<void>
+GluePcmResampler::Resample(ConstBuffer<void> src, Error &error)
+{
+ assert(!src.IsNull());
+
+ if (requested_sample_format != src_sample_format) {
+ src = format_converter.Convert(src, error);
+ if (src.IsNull())
+ return nullptr;
+ }
+
+ return resampler->Resample(src, error);
+}