1 files changed, 65 insertions, 0 deletions
diff --git a/libavfilter/audio.h b/libavfilter/audio.h
new file mode 100644
index 0000000..051efb2
--- /dev/null
+++ b/libavfilter/audio.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) Stefano Sabatini | stefasab at gmail.com
+ * Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFILTER_AUDIO_H
+#define AVFILTER_AUDIO_H
+
+#include "avfilter.h"
+
+
+/** default handler for get_audio_buffer() for audio inputs */
+AVFilterBufferRef *ff_default_get_audio_buffer(AVFilterLink *link, int perms,
+                                                     int nb_samples);
+
+/** get_audio_buffer() handler for filters which simply pass audio along */
+AVFilterBufferRef *ff_null_get_audio_buffer(AVFilterLink *link, int perms,
+                                                  int nb_samples);
+
+/**
+ * Request an audio samples buffer with a specific set of permissions.
+ *
+ * @param link           the output link to the filter from which the buffer will
+ *                       be requested
+ * @param perms          the required access permissions
+ * @param nb_samples     the number of samples per channel
+ * @return               A reference to the samples. This must be unreferenced with
+ *                       avfilter_unref_buffer when you are finished with it.
+ */
+AVFilterBufferRef *ff_get_audio_buffer(AVFilterLink *link, int perms,
+                                             int nb_samples);
+
+/** default handler for filter_samples() for audio inputs */
+void ff_default_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref);
+
+/** filter_samples() handler for filters which simply pass audio along */
+void ff_null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref);
+
+/**
+ * Send a buffer of audio samples to the next filter.
+ *
+ * @param link       the output link over which the audio samples are being sent
+ * @param samplesref a reference to the buffer of audio samples being sent. The
+ *                   receiving filter will free this reference when it no longer
+ *                   needs it or pass it on to the next filter.
+ */
+void ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref);
+
+#endif /* AVFILTER_AUDIO_H */