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authorMax Kellermann <max@duempel.org>2008-10-23 20:00:51 +0200
committerMax Kellermann <max@duempel.org>2008-10-23 20:00:51 +0200
commit6b1c54ef9646abddfbd4960c207b32426300a90c (patch)
tree5b3ae6bf5fc377cf9c705c85948ab5b85e31743c /src/pcm_resample.h
parent098991f8e8a974d2eee39645fa23c43a4c8b06c1 (diff)
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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.
Diffstat (limited to 'src/pcm_resample.h')
-rw-r--r--src/pcm_resample.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/src/pcm_resample.h b/src/pcm_resample.h
new file mode 100644
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--- /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