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Diffstat (limited to 'third_party/libwebrtc/modules/audio_coding/codecs/opus/test/audio_ring_buffer.h')
-rw-r--r-- | third_party/libwebrtc/modules/audio_coding/codecs/opus/test/audio_ring_buffer.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/opus/test/audio_ring_buffer.h b/third_party/libwebrtc/modules/audio_coding/codecs/opus/test/audio_ring_buffer.h new file mode 100644 index 0000000000..a280ca2410 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/codecs/opus/test/audio_ring_buffer.h @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2015 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 MODULES_AUDIO_CODING_CODECS_OPUS_TEST_AUDIO_RING_BUFFER_H_ +#define MODULES_AUDIO_CODING_CODECS_OPUS_TEST_AUDIO_RING_BUFFER_H_ + +#include <stddef.h> + +#include <memory> +#include <vector> + +struct RingBuffer; + +namespace webrtc { + +// A ring buffer tailored for float deinterleaved audio. Any operation that +// cannot be performed as requested will cause a crash (e.g. insufficient data +// in the buffer to fulfill a read request.) +class AudioRingBuffer final { + public: + // Specify the number of channels and maximum number of frames the buffer will + // contain. + AudioRingBuffer(size_t channels, size_t max_frames); + ~AudioRingBuffer(); + + // Copies `data` to the buffer and advances the write pointer. `channels` must + // be the same as at creation time. + void Write(const float* const* data, size_t channels, size_t frames); + + // Copies from the buffer to `data` and advances the read pointer. `channels` + // must be the same as at creation time. + void Read(float* const* data, size_t channels, size_t frames); + + size_t ReadFramesAvailable() const; + size_t WriteFramesAvailable() const; + + // Moves the read position. The forward version advances the read pointer + // towards the write pointer and the backward verison withdraws the read + // pointer away from the write pointer (i.e. flushing and stuffing the buffer + // respectively.) + void MoveReadPositionForward(size_t frames); + void MoveReadPositionBackward(size_t frames); + + private: + // TODO(kwiberg): Use std::vector<std::unique_ptr<RingBuffer>> instead. + std::vector<RingBuffer*> buffers_; +}; + +} // namespace webrtc + +#endif // MODULES_AUDIO_CODING_CODECS_OPUS_TEST_AUDIO_RING_BUFFER_H_ |