| /* |
| * Copyright (c) 2013 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_CODING_NETEQ_TOOLS_AUDIO_LOOP_H_ |
| #define WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_LOOP_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "webrtc/base/array_view.h" |
| #include "webrtc/base/constructormagic.h" |
| #include "webrtc/typedefs.h" |
| |
| namespace webrtc { |
| namespace test { |
| |
| // Class serving as an infinite source of audio, realized by looping an audio |
| // clip. |
| class AudioLoop { |
| public: |
| AudioLoop() |
| : next_index_(0), |
| loop_length_samples_(0), |
| block_length_samples_(0) { |
| } |
| |
| virtual ~AudioLoop() {} |
| |
| // Initializes the AudioLoop by reading from |file_name|. The loop will be no |
| // longer than |max_loop_length_samples|, if the length of the file is |
| // greater. Otherwise, the loop length is the same as the file length. |
| // The audio will be delivered in blocks of |block_length_samples|. |
| // Returns false if the initialization failed, otherwise true. |
| bool Init(const std::string file_name, size_t max_loop_length_samples, |
| size_t block_length_samples); |
| |
| // Returns a (pointer,size) pair for the next block of audio. The size is |
| // equal to the |block_length_samples| Init() argument. |
| rtc::ArrayView<const int16_t> GetNextBlock(); |
| |
| private: |
| size_t next_index_; |
| size_t loop_length_samples_; |
| size_t block_length_samples_; |
| std::unique_ptr<int16_t[]> audio_array_; |
| |
| RTC_DISALLOW_COPY_AND_ASSIGN(AudioLoop); |
| }; |
| |
| } // namespace test |
| } // namespace webrtc |
| #endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_LOOP_H_ |