1 files changed, 81 insertions, 0 deletions

diff --git a/firmware/export/pcm-internal.h b/firmware/export/pcm-internal.h
new file mode 100644
index 0000000000..d69138f534
--- /dev/null
+++ b/firmware/export/pcm-internal.h
@@ -0,0 +1,81 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 by Linus Nielsen Feltzing
+ * Copyright (C) 2011 by Michael Sevakis
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef PCM_INTERNAL_H
+#define PCM_INTERNAL_H
+
+/** The following are for internal use between pcm.c and target-
+    specific portion **/
+
+/* Called by the bottom layer ISR when more data is needed. Returns non-
+ * zero size if more data is to be played. Setting start to NULL
+ * forces stop. */
+void pcm_play_get_more_callback(void **start, size_t *size);
+
+/* Called by the bottom layer ISR after next transfer has begun in order
+   to fill more data for next "get more" callback to implement double-buffered
+   callbacks - except for a couple ASM handlers, help drivers to implement
+   this functionality with minimal overhead */
+static FORCE_INLINE void pcm_play_dma_started_callback(void)
+{
+    extern void (* pcm_play_dma_started)(void);
+    void (* callback)(void) = pcm_play_dma_started;
+    if (callback)
+        callback();
+}
+
+extern unsigned long pcm_curr_sampr;
+extern unsigned long pcm_sampr;
+extern int pcm_fsel;
+
+#ifdef HAVE_PCM_DMA_ADDRESS
+void * pcm_dma_addr(void *addr);
+#endif
+
+extern volatile bool pcm_playing;
+extern volatile bool pcm_paused;
+
+void pcm_play_dma_lock(void);
+void pcm_play_dma_unlock(void);
+void pcm_play_dma_init(void) INIT_ATTR;
+void pcm_play_dma_start(const void *addr, size_t size);
+void pcm_play_dma_stop(void);
+void pcm_play_dma_pause(bool pause);
+const void * pcm_play_dma_get_peak_buffer(int *count);
+
+void pcm_dma_apply_settings(void);
+
+#ifdef HAVE_RECORDING
+
+/* DMA transfer in is currently active */
+extern volatile bool pcm_recording;
+
+/* APIs implemented in the target-specific portion */
+void pcm_rec_dma_init(void);
+void pcm_rec_dma_close(void);
+void pcm_rec_dma_start(void *addr, size_t size);
+void pcm_rec_dma_record_more(void *start, size_t size);
+void pcm_rec_dma_stop(void);
+const void * pcm_rec_dma_get_peak_buffer(void);
+
+#endif /* HAVE_RECORDING */
+
+#endif /* PCM_INTERNAL_H */