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60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
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/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_LOOP_H_
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#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_LOOP_H_
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#include <string>
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#include "webrtc/base/constructormagic.h"
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#include "webrtc/system_wrappers/interface/scoped_ptr.h"
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#include "webrtc/typedefs.h"
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namespace webrtc {
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namespace test {
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// Class serving as an infinite source of audio, realized by looping an audio
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// clip.
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class AudioLoop {
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public:
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AudioLoop()
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: next_index_(0),
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loop_length_samples_(0),
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block_length_samples_(0) {
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}
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virtual ~AudioLoop() {}
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// Initializes the AudioLoop by reading from |file_name|. The loop will be no
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// longer than |max_loop_length_samples|, if the length of the file is
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// greater. Otherwise, the loop length is the same as the file length.
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// The audio will be delivered in blocks of |block_length_samples|.
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// Returns false if the initialization failed, otherwise true.
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bool Init(const std::string file_name, size_t max_loop_length_samples,
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size_t block_length_samples);
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// Returns a pointer to the next block of audio. The number given as
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// |block_length_samples| to the Init() function determines how many samples
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// that can be safely read from the pointer.
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const int16_t* GetNextBlock();
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private:
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size_t next_index_;
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size_t loop_length_samples_;
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size_t block_length_samples_;
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scoped_ptr<int16_t[]> audio_array_;
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DISALLOW_COPY_AND_ASSIGN(AudioLoop);
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};
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} // namespace test
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_LOOP_H_
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