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Diffstat (limited to '')
-rw-r--r-- | third_party/libwebrtc/modules/audio_coding/neteq/tools/input_audio_file.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_coding/neteq/tools/input_audio_file.h b/third_party/libwebrtc/modules/audio_coding/neteq/tools/input_audio_file.h new file mode 100644 index 0000000000..f538b295a3 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_coding/neteq/tools/input_audio_file.h @@ -0,0 +1,62 @@ +/* + * 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_ |