pcm_utils: moved code to pcm_resample.c

Separate the resampling code from the rest of pcm_utils.c.  Create two
sub-libraries: pcm_resample_libsamplerate.c and
pcm_resample_fallback.c.

1 files changed, 63 insertions, 0 deletions

diff --git a/src/pcm_resample.h b/src/pcm_resample.h
new file mode 100644
index 000000000..d6001550a
--- /dev/null
+++ b/src/pcm_resample.h
@@ -0,0 +1,63 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * Copyright (C) 2008 Max Kellermann <max@duempel.org>
+ * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef MPD_PCM_RESAMPLE_H
+#define MPD_PCM_RESAMPLE_H
+
+#include "config.h"
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#ifdef HAVE_LIBSAMPLERATE
+#include <samplerate.h>
+#endif
+
+struct pcm_resample_state {
+#ifdef HAVE_LIBSAMPLERATE
+	SRC_STATE *state;
+	SRC_DATA data;
+	size_t data_in_size;
+	size_t data_out_size;
+
+	struct {
+		unsigned src_rate;
+		unsigned dest_rate;
+		uint8_t channels;
+	} prev;
+
+	bool error;
+#else
+	/* struct must not be empty */
+	int dummy;
+#endif
+};
+
+void pcm_resample_init(struct pcm_resample_state *state);
+
+size_t
+pcm_resample_16(uint8_t channels,
+		unsigned src_rate,
+		const int16_t *src_buffer, size_t src_size,
+		unsigned dest_rate,
+		int16_t *dest_buffer, size_t dest_size,
+		struct pcm_resample_state *state);
+
+#endif