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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_BASE_FAKE_AUDIO_RENDER_CALLBACK_H_
#define MEDIA_BASE_FAKE_AUDIO_RENDER_CALLBACK_H_
#include <vector>
#include "media/base/audio_renderer_sink.h"
#include "testing/gmock/include/gmock/gmock.h"
namespace media {
// Fake RenderCallback which will fill each request with a sine wave. Sine
// state is kept across callbacks. State can be reset to default via reset().
class FakeAudioRenderCallback : public AudioRendererSink::RenderCallback {
public:
// The function used to fulfill Render() is f(x) = sin(2 * PI * x * |step|),
// where x = [|number_of_frames| * m, |number_of_frames| * (m + 1)] and m =
// the number of Render() calls fulfilled thus far.
explicit FakeAudioRenderCallback(double step);
virtual ~FakeAudioRenderCallback();
// Renders a sine wave into the provided audio data buffer. If |half_fill_|
// is set, will only fill half the buffer.
int Render(const std::vector<float*>& audio_data, int number_of_frames,
int audio_delay_milliseconds) OVERRIDE;
MOCK_METHOD0(OnRenderError, void());
// Toggles only filling half the requested amount during Render().
void set_half_fill(bool half_fill) { half_fill_ = half_fill; }
// Reset the sine state to initial value.
void reset() { x_ = 0; }
private:
bool half_fill_;
double x_;
double step_;
DISALLOW_COPY_AND_ASSIGN(FakeAudioRenderCallback);
};
} // namespace media
#endif // MEDIA_BASE_FAKE_AUDIO_RENDER_CALLBACK_H_
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