decoder/ffmpeg: move code to pcm/Interleave.cxx

src/pcm/Interleave.cxx

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2003-2015 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 "Interleave.hxx"
+
+#include <stdint.h>
+#include <string.h>
+
+static void
+GenericPcmInterleave(uint8_t *dest, ConstBuffer<const uint8_t *> src,
+		     size_t n_frames, size_t sample_size)
+{
+	for (size_t frame = 0; frame < n_frames; ++frame) {
+		for (size_t channel = 0; channel < src.size; ++channel) {
+			memcpy(dest, src[channel] + frame * sample_size,
+			       sample_size);
+			dest += sample_size;
+		}
+	}
+}
+
+void
+PcmInterleave(void *dest, ConstBuffer<const void *> src,
+	      size_t n_frames, size_t sample_size)
+{
+	GenericPcmInterleave((uint8_t *)dest,
+			     ConstBuffer<const uint8_t *>((const uint8_t *const*)src.data,
+							  src.size),
+			     n_frames, sample_size);
+}

src/pcm/Interleave.hxx

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2003-2015 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 "util/ConstBuffer.hxx"
+
+/**
+ * Interleave planar PCM samples from #src to #dest.
+ */
+void
+PcmInterleave(void *dest, ConstBuffer<const void *> src,
+	      size_t n_frames, size_t sample_size);
+
+#endif