1 /* 2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 #ifndef MODULES_AUDIO_CODING_CODECS_OPUS_TEST_AUDIO_RING_BUFFER_H_ 11 #define MODULES_AUDIO_CODING_CODECS_OPUS_TEST_AUDIO_RING_BUFFER_H_ 12 13 #include <stddef.h> 14 15 #include <memory> 16 #include <vector> 17 18 struct RingBuffer; 19 20 namespace webrtc { 21 22 // A ring buffer tailored for float deinterleaved audio. Any operation that 23 // cannot be performed as requested will cause a crash (e.g. insufficient data 24 // in the buffer to fulfill a read request.) 25 class AudioRingBuffer final { 26 public: 27 // Specify the number of channels and maximum number of frames the buffer will 28 // contain. 29 AudioRingBuffer(size_t channels, size_t max_frames); 30 ~AudioRingBuffer(); 31 32 // Copies |data| to the buffer and advances the write pointer. |channels| must 33 // be the same as at creation time. 34 void Write(const float* const* data, size_t channels, size_t frames); 35 36 // Copies from the buffer to |data| and advances the read pointer. |channels| 37 // must be the same as at creation time. 38 void Read(float* const* data, size_t channels, size_t frames); 39 40 size_t ReadFramesAvailable() const; 41 size_t WriteFramesAvailable() const; 42 43 // Moves the read position. The forward version advances the read pointer 44 // towards the write pointer and the backward verison withdraws the read 45 // pointer away from the write pointer (i.e. flushing and stuffing the buffer 46 // respectively.) 47 void MoveReadPositionForward(size_t frames); 48 void MoveReadPositionBackward(size_t frames); 49 50 private: 51 // TODO(kwiberg): Use std::vector<std::unique_ptr<RingBuffer>> instead. 52 std::vector<RingBuffer*> buffers_; 53 }; 54 55 } // namespace webrtc 56 57 #endif // MODULES_AUDIO_CODING_CODECS_OPUS_TEST_AUDIO_RING_BUFFER_H_ 58