| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #pragma once |
| |
| #include <audio-utils/audio-stream.h> |
| #include <zircon/types.h> |
| |
| class SineSource : public audio::utils::AudioSource { |
| public: |
| SineSource() { } |
| |
| zx_status_t Init(float freq, |
| float amp, |
| float duration_secs, |
| uint32_t frame_rate, |
| uint32_t channels, |
| audio_sample_format_t sample_format); |
| |
| zx_status_t GetFormat(Format* out_format) final; |
| zx_status_t GetFrames(void* buffer, uint32_t buf_space, uint32_t* out_packed); |
| bool finished() const final { return (frames_produced_ >= frames_to_produce_); } |
| |
| private: |
| using GetFramesThunk = zx_status_t (SineSource::*)(void* buffer, |
| uint32_t buf_space, |
| uint32_t* out_packed); |
| |
| template <audio_sample_format_t SAMPLE_FORMAT> |
| zx_status_t InitInternal(); |
| |
| template <audio_sample_format_t SAMPLE_FORMAT> |
| zx_status_t GetFramesInternal(void* buffer, uint32_t buf_space, uint32_t* out_packed); |
| |
| uint64_t frames_to_produce_; |
| uint64_t frames_produced_; |
| double amp_; |
| double sine_scalar_; |
| uint32_t frame_rate_; |
| uint32_t channels_; |
| uint32_t frame_size_; |
| audio_sample_format_t sample_format_; |
| GetFramesThunk get_frames_thunk_ = nullptr; |
| }; |