Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 91 insertions, 0 deletions

diff --git a/media/libcubeb/src/cubeb_resampler.h b/media/libcubeb/src/cubeb_resampler.h
new file mode 100644
index 0000000000..711a3771d4
--- /dev/null
+++ b/media/libcubeb/src/cubeb_resampler.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright © 2014 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#ifndef CUBEB_RESAMPLER_H
+#define CUBEB_RESAMPLER_H
+
+#include "cubeb/cubeb.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+typedef struct cubeb_resampler cubeb_resampler;
+
+typedef enum {
+  CUBEB_RESAMPLER_QUALITY_VOIP,
+  CUBEB_RESAMPLER_QUALITY_DEFAULT,
+  CUBEB_RESAMPLER_QUALITY_DESKTOP
+} cubeb_resampler_quality;
+
+typedef enum {
+  CUBEB_RESAMPLER_RECLOCK_NONE,
+  CUBEB_RESAMPLER_RECLOCK_INPUT
+} cubeb_resampler_reclock;
+
+/**
+ * Create a resampler to adapt the requested sample rate into something that
+ * is accepted by the audio backend.
+ * @param stream A cubeb_stream instance supplied to the data callback.
+ * @param input_params Used to calculate bytes per frame and buffer size for
+ * resampling of the input side of the stream. NULL if input should not be
+ * resampled.
+ * @param output_params Used to calculate bytes per frame and buffer size for
+ * resampling of the output side of the stream. NULL if output should not be
+ * resampled.
+ * @param target_rate The sampling rate after resampling for the input side of
+ * the stream, and/or the sampling rate prior to resampling of the output side
+ * of the stream.
+ * @param callback A callback to request data for resampling.
+ * @param user_ptr User data supplied to the data callback.
+ * @param quality Quality of the resampler.
+ * @retval A non-null pointer if success.
+ */
+cubeb_resampler *
+cubeb_resampler_create(cubeb_stream * stream,
+                       cubeb_stream_params * input_params,
+                       cubeb_stream_params * output_params,
+                       unsigned int target_rate, cubeb_data_callback callback,
+                       void * user_ptr, cubeb_resampler_quality quality,
+                       cubeb_resampler_reclock reclock);
+
+/**
+ * Fill the buffer with frames acquired using the data callback. Resampling will
+ * happen if necessary.
+ * @param resampler A cubeb_resampler instance.
+ * @param input_buffer A buffer of input samples
+ * @param input_frame_count The size of the buffer. Returns the number of frames
+ * consumed.
+ * @param output_buffer The buffer to be filled.
+ * @param output_frames_needed Number of frames that should be produced.
+ * @retval Number of frames that are actually produced.
+ * @retval CUBEB_ERROR on error.
+ */
+long
+cubeb_resampler_fill(cubeb_resampler * resampler, void * input_buffer,
+                     long * input_frame_count, void * output_buffer,
+                     long output_frames_needed);
+
+/**
+ * Destroy a cubeb_resampler.
+ * @param resampler A cubeb_resampler instance.
+ */
+void
+cubeb_resampler_destroy(cubeb_resampler * resampler);
+
+/**
+ * Returns the latency, in frames, of the resampler.
+ * @param resampler A cubeb resampler instance.
+ * @retval The latency, in frames, induced by the resampler.
+ */
+long
+cubeb_resampler_latency(cubeb_resampler * resampler);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* CUBEB_RESAMPLER_H */