Index: webrtc/modules/audio_mixer/sine_wave_generator.h |
diff --git a/webrtc/modules/audio_mixer/sine_wave_generator.h b/webrtc/modules/audio_mixer/sine_wave_generator.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..7d17293ef02f0face19a5c71954057a23c414d51 |
--- /dev/null |
+++ b/webrtc/modules/audio_mixer/sine_wave_generator.h |
@@ -0,0 +1,38 @@ |
+/* |
+ * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. |
+ * |
+ * Use of this source code is governed by a BSD-style license |
+ * that can be found in the LICENSE file in the root of the source |
+ * tree. An additional intellectual property rights grant can be found |
+ * in the file PATENTS. All contributing project authors may |
+ * be found in the AUTHORS file in the root of the source tree. |
+ */ |
+ |
+#ifndef WEBRTC_MODULES_AUDIO_MIXER_SINE_WAVE_GENERATOR_H_ |
+#define WEBRTC_MODULES_AUDIO_MIXER_SINE_WAVE_GENERATOR_H_ |
+ |
+#include "webrtc/base/checks.h" |
+#include "webrtc/modules/include/module_common_types.h" |
+ |
+namespace webrtc { |
+ |
+class SineWaveGenerator { |
+ public: |
+ SineWaveGenerator(float wave_frequency_hz, int16_t amplitude) |
+ : wave_frequency_hz_(wave_frequency_hz), amplitude_(amplitude) { |
+ RTC_DCHECK_GT(wave_frequency_hz, 0); |
+ } |
+ |
+ // Produces appropriate output based on frame->num_channels_, |
+ // frame->sample_rate_hz_. |
+ void GenerateNextFrame(AudioFrame* frame); |
+ |
+ private: |
+ float phase_ = 0.f; |
+ const float wave_frequency_hz_; |
+ const int16_t amplitude_; |
+}; |
+ |
+} // namespace webrtc |
+ |
+#endif // WEBRTC_MODULES_AUDIO_MIXER_SINE_WAVE_GENERATOR_H_ |