108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/*
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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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#include <cfloat>
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#include <cstdio>
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#include <cstdlib>
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#include <memory>
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#include <vector>
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#include "modules/audio_processing/transient/file_utils.h"
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#include "modules/audio_processing/transient/transient_detector.h"
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#include "rtc_base/system/file_wrapper.h"
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using webrtc::FileWrapper;
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using webrtc::TransientDetector;
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// Application to generate a RTP timing file.
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// Opens the PCM file and divides the signal in frames.
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// Creates a send times array, one for each step.
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// Each block that contains a transient, has an infinite send time.
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// The resultant array is written to a DAT file
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// Returns -1 on error or |lost_packets| otherwise.
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int main(int argc, char* argv[]) {
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if (argc != 5) {
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printf("\n%s - Application to generate a RTP timing file.\n\n", argv[0]);
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printf("%s PCMfile DATfile chunkSize sampleRate\n\n", argv[0]);
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printf("Opens the PCMfile with sampleRate in Hertz.\n");
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printf("Creates a send times array, one for each chunkSize ");
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printf("milliseconds step.\n");
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printf("Each block that contains a transient, has an infinite send time. ");
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printf("The resultant array is written to a DATfile.\n\n");
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return 0;
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}
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FileWrapper pcm_file = FileWrapper::OpenReadOnly(argv[1]);
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if (!pcm_file.is_open()) {
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printf("\nThe %s could not be opened.\n\n", argv[1]);
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return -1;
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}
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FileWrapper dat_file = FileWrapper::OpenWriteOnly(argv[2]);
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if (!dat_file.is_open()) {
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printf("\nThe %s could not be opened.\n\n", argv[2]);
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return -1;
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}
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int chunk_size_ms = atoi(argv[3]);
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if (chunk_size_ms <= 0) {
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printf("\nThe chunkSize must be a positive integer\n\n");
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return -1;
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}
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int sample_rate_hz = atoi(argv[4]);
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if (sample_rate_hz <= 0) {
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printf("\nThe sampleRate must be a positive integer\n\n");
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return -1;
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}
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TransientDetector detector(sample_rate_hz);
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int lost_packets = 0;
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size_t audio_buffer_length = chunk_size_ms * sample_rate_hz / 1000;
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std::unique_ptr<float[]> audio_buffer(new float[audio_buffer_length]);
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std::vector<float> send_times;
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// Read first buffer from the PCM test file.
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size_t file_samples_read = ReadInt16FromFileToFloatBuffer(
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&pcm_file, audio_buffer_length, audio_buffer.get());
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for (int time = 0; file_samples_read > 0; time += chunk_size_ms) {
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// Pad the rest of the buffer with zeros.
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for (size_t i = file_samples_read; i < audio_buffer_length; ++i) {
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audio_buffer[i] = 0.0;
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}
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float value =
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detector.Detect(audio_buffer.get(), audio_buffer_length, NULL, 0);
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if (value < 0.5f) {
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value = time;
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} else {
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value = FLT_MAX;
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++lost_packets;
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}
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send_times.push_back(value);
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// Read next buffer from the PCM test file.
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file_samples_read = ReadInt16FromFileToFloatBuffer(
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&pcm_file, audio_buffer_length, audio_buffer.get());
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}
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size_t floats_written =
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WriteFloatBufferToFile(&dat_file, send_times.size(), &send_times[0]);
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if (floats_written == 0) {
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printf("\nThe send times could not be written to DAT file\n\n");
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return -1;
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}
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pcm_file.Close();
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dat_file.Close();
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return lost_packets;
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}
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