1 /* 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "webrtc/modules/audio_coding/neteq/audio_classifier.h" 12 13 #include <math.h> 14 #include <stdio.h> 15 #include <stdlib.h> 16 #include <string.h> 17 18 #include <string> 19 #include <iostream> 20 21 #include "webrtc/system_wrappers/interface/scoped_ptr.h" 22 23 int main(int argc, char* argv[]) { 24 if (argc != 5) { 25 std::cout << "Usage: " << argv[0] << 26 " channels output_type <input file name> <output file name> " 27 << std::endl << std::endl; 28 std::cout << "Where channels can be 1 (mono) or 2 (interleaved stereo),"; 29 std::cout << " outputs can be 1 (classification (boolean)) or 2"; 30 std::cout << " (classification and music probability (float))," 31 << std::endl; 32 std::cout << "and the sampling frequency is assumed to be 48 kHz." 33 << std::endl; 34 return -1; 35 } 36 37 const int kFrameSizeSamples = 960; 38 int channels = atoi(argv[1]); 39 if (channels < 1 || channels > 2) { 40 std::cout << "Disallowed number of channels " << channels << std::endl; 41 return -1; 42 } 43 44 int outputs = atoi(argv[2]); 45 if (outputs < 1 || outputs > 2) { 46 std::cout << "Disallowed number of outputs " << outputs << std::endl; 47 return -1; 48 } 49 50 const int data_size = channels * kFrameSizeSamples; 51 webrtc::scoped_ptr<int16_t[]> in(new int16_t[data_size]); 52 53 std::string input_filename = argv[3]; 54 std::string output_filename = argv[4]; 55 56 std::cout << "Input file: " << input_filename << std::endl; 57 std::cout << "Output file: " << output_filename << std::endl; 58 59 FILE* in_file = fopen(input_filename.c_str(), "rb"); 60 if (!in_file) { 61 std::cout << "Cannot open input file " << input_filename << std::endl; 62 return -1; 63 } 64 65 FILE* out_file = fopen(output_filename.c_str(), "wb"); 66 if (!out_file) { 67 std::cout << "Cannot open output file " << output_filename << std::endl; 68 return -1; 69 } 70 71 webrtc::AudioClassifier classifier; 72 int frame_counter = 0; 73 int music_counter = 0; 74 while (fread(in.get(), sizeof(*in.get()), 75 data_size, in_file) == (size_t) data_size) { 76 bool is_music = classifier.Analysis(in.get(), data_size, channels); 77 if (!fwrite(&is_music, sizeof(is_music), 1, out_file)) { 78 std::cout << "Error writing." << std::endl; 79 return -1; 80 } 81 if (is_music) { 82 music_counter++; 83 } 84 std::cout << "frame " << frame_counter << " decision " << is_music; 85 if (outputs == 2) { 86 float music_prob = classifier.music_probability(); 87 if (!fwrite(&music_prob, sizeof(music_prob), 1, out_file)) { 88 std::cout << "Error writing." << std::endl; 89 return -1; 90 } 91 std::cout << " music prob " << music_prob; 92 } 93 std::cout << std::endl; 94 frame_counter++; 95 } 96 std::cout << frame_counter << " frames processed." << std::endl; 97 if (frame_counter > 0) { 98 float music_percentage = music_counter / static_cast<float>(frame_counter); 99 std::cout << music_percentage << " percent music." << std::endl; 100 } 101 102 fclose(in_file); 103 fclose(out_file); 104 return 0; 105 } 106
