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/*
* 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 MODULES_AUDIO_CODING_NETEQ_TOOLS_INPUT_AUDIO_FILE_H_
#define MODULES_AUDIO_CODING_NETEQ_TOOLS_INPUT_AUDIO_FILE_H_
#include <stdio.h>
#include <string>
#include "absl/strings/string_view.h"
namespace webrtc {
namespace test {
// Class for handling a looping input audio file.
class InputAudioFile {
public:
explicit InputAudioFile(absl::string_view file_name, bool loop_at_end = true);
virtual ~InputAudioFile();
InputAudioFile(const InputAudioFile&) = delete;
InputAudioFile& operator=(const InputAudioFile&) = delete;
// Reads `samples` elements from source file to `destination`. Returns true
// if the read was successful, otherwise false. If the file end is reached,
// the file is rewound and reading continues from the beginning.
// The output `destination` must have the capacity to hold `samples` elements.
virtual bool Read(size_t samples, int16_t* destination);
// Fast-forwards (`samples` > 0) or -backwards (`samples` < 0) the file by the
// indicated number of samples. Just like Read(), Seek() starts over at the
// beginning of the file if the end is reached. However, seeking backwards
// past the beginning of the file is not possible.
virtual bool Seek(int samples);
// Creates a multi-channel signal from a mono signal. Each sample is repeated
// `channels` times to create an interleaved multi-channel signal where all
// channels are identical. The output `destination` must have the capacity to
// hold samples * channels elements. Note that `source` and `destination` can
// be the same array (i.e., point to the same address).
static void DuplicateInterleaved(const int16_t* source,
size_t samples,
size_t channels,
int16_t* destination);
private:
FILE* fp_;
const bool loop_at_end_;
};
} // namespace test
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_NETEQ_TOOLS_INPUT_AUDIO_FILE_H_