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Diffstat (limited to 'third_party/libwebrtc/modules/audio_processing/transient/test/readPCM.m')
-rw-r--r-- | third_party/libwebrtc/modules/audio_processing/transient/test/readPCM.m | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/transient/test/readPCM.m b/third_party/libwebrtc/modules/audio_processing/transient/test/readPCM.m new file mode 100644 index 0000000000..cd3cef8a3c --- /dev/null +++ b/third_party/libwebrtc/modules/audio_processing/transient/test/readPCM.m @@ -0,0 +1,26 @@ +% +% Copyright (c) 2014 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. +% + +function [x, t] = readPCM(file, fs) +%[x, t] = readPCM(file, fs) +% +%Reads a signal from a PCM file. +% +%x: The read signal after normalization. +%t: The respective time vector. +% +%file: The PCM file where the signal is stored in int16 format. +%fs: The signal sample rate in Hertz. +fid = fopen(file); +x = fread(fid, inf, 'int16'); +fclose(fid); +x = x - mean(x); +x = x / max(abs(x)); +t = 0:(1 / fs):((length(x) - 1) / fs); |