1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdio.h> 18 #include <inttypes.h> 19 #include <math.h> 20 #include <vector> 21 #include <audio_utils/primitives.h> 22 #include <audio_utils/sndfile.h> 23 #include <media/AudioBufferProvider.h> 24 #include <media/AudioMixer.h> 25 #include "test_utils.h" 26 27 /* Testing is typically through creation of an output WAV file from several 28 * source inputs, to be later analyzed by an audio program such as Audacity. 29 * 30 * Sine or chirp functions are typically more useful as input to the mixer 31 * as they show up as straight lines on a spectrogram if successfully mixed. 32 * 33 * A sample shell script is provided: mixer_to_wave_tests.sh 34 */ 35 36 using namespace android; 37 38 static void usage(const char* name) { 39 fprintf(stderr, "Usage: %s [-f] [-m] [-c channels]" 40 " [-s sample-rate] [-o <output-file>] [-a <aux-buffer-file>] [-P csv]" 41 " (<input-file> | <command>)+\n", name); 42 fprintf(stderr, " -f enable floating point input track by default\n"); 43 fprintf(stderr, " -m enable floating point mixer output\n"); 44 fprintf(stderr, " -c number of mixer output channels\n"); 45 fprintf(stderr, " -s mixer sample-rate\n"); 46 fprintf(stderr, " -o <output-file> WAV file, pcm16 (or float if -m specified)\n"); 47 fprintf(stderr, " -a <aux-buffer-file>\n"); 48 fprintf(stderr, " -P # frames provided per call to resample() in CSV format\n"); 49 fprintf(stderr, " <input-file> is a WAV file\n"); 50 fprintf(stderr, " <command> can be 'sine:[(i|f),]<channels>,<frequency>,<samplerate>'\n"); 51 fprintf(stderr, " 'chirp:[(i|f),]<channels>,<samplerate>'\n"); 52 } 53 54 static int writeFile(const char *filename, const void *buffer, 55 uint32_t sampleRate, uint32_t channels, size_t frames, bool isBufferFloat) { 56 if (filename == NULL) { 57 return 0; // ok to pass in NULL filename 58 } 59 // write output to file. 60 SF_INFO info; 61 info.frames = 0; 62 info.samplerate = sampleRate; 63 info.channels = channels; 64 info.format = SF_FORMAT_WAV | (isBufferFloat ? SF_FORMAT_FLOAT : SF_FORMAT_PCM_16); 65 printf("saving file:%s channels:%u samplerate:%u frames:%zu\n", 66 filename, info.channels, info.samplerate, frames); 67 SNDFILE *sf = sf_open(filename, SFM_WRITE, &info); 68 if (sf == NULL) { 69 perror(filename); 70 return EXIT_FAILURE; 71 } 72 if (isBufferFloat) { 73 (void) sf_writef_float(sf, (float*)buffer, frames); 74 } else { 75 (void) sf_writef_short(sf, (short*)buffer, frames); 76 } 77 sf_close(sf); 78 return EXIT_SUCCESS; 79 } 80 81 const char *parseFormat(const char *s, bool *useFloat) { 82 if (!strncmp(s, "f,", 2)) { 83 *useFloat = true; 84 return s + 2; 85 } 86 if (!strncmp(s, "i,", 2)) { 87 *useFloat = false; 88 return s + 2; 89 } 90 return s; 91 } 92 93 int main(int argc, char* argv[]) { 94 const char* const progname = argv[0]; 95 bool useInputFloat = false; 96 bool useMixerFloat = false; 97 bool useRamp = true; 98 uint32_t outputSampleRate = 48000; 99 uint32_t outputChannels = 2; // stereo for now 100 std::vector<int> Pvalues; 101 const char* outputFilename = NULL; 102 const char* auxFilename = NULL; 103 std::vector<int32_t> names; 104 std::vector<SignalProvider> providers; 105 std::vector<audio_format_t> formats; 106 107 for (int ch; (ch = getopt(argc, argv, "fmc:s:o:a:P:")) != -1;) { 108 switch (ch) { 109 case 'f': 110 useInputFloat = true; 111 break; 112 case 'm': 113 useMixerFloat = true; 114 break; 115 case 'c': 116 outputChannels = atoi(optarg); 117 break; 118 case 's': 119 outputSampleRate = atoi(optarg); 120 break; 121 case 'o': 122 outputFilename = optarg; 123 break; 124 case 'a': 125 auxFilename = optarg; 126 break; 127 case 'P': 128 if (parseCSV(optarg, Pvalues) < 0) { 129 fprintf(stderr, "incorrect syntax for -P option\n"); 130 return EXIT_FAILURE; 131 } 132 break; 133 case '?': 134 default: 135 usage(progname); 136 return EXIT_FAILURE; 137 } 138 } 139 argc -= optind; 140 argv += optind; 141 142 if (argc == 0) { 143 usage(progname); 144 return EXIT_FAILURE; 145 } 146 147 size_t outputFrames = 0; 148 149 // create providers for each track 150 names.resize(argc); 151 providers.resize(argc); 152 formats.resize(argc); 153 for (int i = 0; i < argc; ++i) { 154 static const char chirp[] = "chirp:"; 155 static const char sine[] = "sine:"; 156 static const double kSeconds = 1; 157 bool useFloat = useInputFloat; 158 159 if (!strncmp(argv[i], chirp, strlen(chirp))) { 160 std::vector<int> v; 161 const char *s = parseFormat(argv[i] + strlen(chirp), &useFloat); 162 163 parseCSV(s, v); 164 if (v.size() == 2) { 165 printf("creating chirp(%d %d)\n", v[0], v[1]); 166 if (useFloat) { 167 providers[i].setChirp<float>(v[0], 0, v[1]/2, v[1], kSeconds); 168 formats[i] = AUDIO_FORMAT_PCM_FLOAT; 169 } else { 170 providers[i].setChirp<int16_t>(v[0], 0, v[1]/2, v[1], kSeconds); 171 formats[i] = AUDIO_FORMAT_PCM_16_BIT; 172 } 173 providers[i].setIncr(Pvalues); 174 } else { 175 fprintf(stderr, "malformed input '%s'\n", argv[i]); 176 } 177 } else if (!strncmp(argv[i], sine, strlen(sine))) { 178 std::vector<int> v; 179 const char *s = parseFormat(argv[i] + strlen(sine), &useFloat); 180 181 parseCSV(s, v); 182 if (v.size() == 3) { 183 printf("creating sine(%d %d %d)\n", v[0], v[1], v[2]); 184 if (useFloat) { 185 providers[i].setSine<float>(v[0], v[1], v[2], kSeconds); 186 formats[i] = AUDIO_FORMAT_PCM_FLOAT; 187 } else { 188 providers[i].setSine<int16_t>(v[0], v[1], v[2], kSeconds); 189 formats[i] = AUDIO_FORMAT_PCM_16_BIT; 190 } 191 providers[i].setIncr(Pvalues); 192 } else { 193 fprintf(stderr, "malformed input '%s'\n", argv[i]); 194 } 195 } else { 196 printf("creating filename(%s)\n", argv[i]); 197 if (useInputFloat) { 198 providers[i].setFile<float>(argv[i]); 199 formats[i] = AUDIO_FORMAT_PCM_FLOAT; 200 } else { 201 providers[i].setFile<short>(argv[i]); 202 formats[i] = AUDIO_FORMAT_PCM_16_BIT; 203 } 204 providers[i].setIncr(Pvalues); 205 } 206 // calculate the number of output frames 207 size_t nframes = (int64_t) providers[i].getNumFrames() * outputSampleRate 208 / providers[i].getSampleRate(); 209 if (i == 0 || outputFrames > nframes) { // choose minimum for outputFrames 210 outputFrames = nframes; 211 } 212 } 213 214 // create the output buffer. 215 const size_t outputFrameSize = outputChannels 216 * (useMixerFloat ? sizeof(float) : sizeof(int16_t)); 217 const size_t outputSize = outputFrames * outputFrameSize; 218 const audio_channel_mask_t outputChannelMask = 219 audio_channel_out_mask_from_count(outputChannels); 220 void *outputAddr = NULL; 221 (void) posix_memalign(&outputAddr, 32, outputSize); 222 memset(outputAddr, 0, outputSize); 223 224 // create the aux buffer, if needed. 225 const size_t auxFrameSize = sizeof(int32_t); // Q4.27 always 226 const size_t auxSize = outputFrames * auxFrameSize; 227 void *auxAddr = NULL; 228 if (auxFilename) { 229 (void) posix_memalign(&auxAddr, 32, auxSize); 230 memset(auxAddr, 0, auxSize); 231 } 232 233 // create the mixer. 234 const size_t mixerFrameCount = 320; // typical numbers may range from 240 or 960 235 AudioMixer *mixer = new AudioMixer(mixerFrameCount, outputSampleRate); 236 audio_format_t mixerFormat = useMixerFloat 237 ? AUDIO_FORMAT_PCM_FLOAT : AUDIO_FORMAT_PCM_16_BIT; 238 float f = AudioMixer::UNITY_GAIN_FLOAT / providers.size(); // normalize volume by # tracks 239 static float f0; // zero 240 241 // set up the tracks. 242 for (size_t i = 0; i < providers.size(); ++i) { 243 //printf("track %d out of %d\n", i, providers.size()); 244 uint32_t channelMask = audio_channel_out_mask_from_count(providers[i].getNumChannels()); 245 const int name = i; 246 const status_t status = mixer->create( 247 name, channelMask, formats[i], AUDIO_SESSION_OUTPUT_MIX); 248 LOG_ALWAYS_FATAL_IF(status != OK); 249 names[i] = name; 250 mixer->setBufferProvider(name, &providers[i]); 251 mixer->setParameter(name, AudioMixer::TRACK, AudioMixer::MAIN_BUFFER, 252 (void *)outputAddr); 253 mixer->setParameter( 254 name, 255 AudioMixer::TRACK, 256 AudioMixer::MIXER_FORMAT, 257 (void *)(uintptr_t)mixerFormat); 258 mixer->setParameter( 259 name, 260 AudioMixer::TRACK, 261 AudioMixer::FORMAT, 262 (void *)(uintptr_t)formats[i]); 263 mixer->setParameter( 264 name, 265 AudioMixer::TRACK, 266 AudioMixer::MIXER_CHANNEL_MASK, 267 (void *)(uintptr_t)outputChannelMask); 268 mixer->setParameter( 269 name, 270 AudioMixer::TRACK, 271 AudioMixer::CHANNEL_MASK, 272 (void *)(uintptr_t)channelMask); 273 mixer->setParameter( 274 name, 275 AudioMixer::RESAMPLE, 276 AudioMixer::SAMPLE_RATE, 277 (void *)(uintptr_t)providers[i].getSampleRate()); 278 if (useRamp) { 279 mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::VOLUME0, &f0); 280 mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::VOLUME1, &f0); 281 mixer->setParameter(name, AudioMixer::RAMP_VOLUME, AudioMixer::VOLUME0, &f); 282 mixer->setParameter(name, AudioMixer::RAMP_VOLUME, AudioMixer::VOLUME1, &f); 283 } else { 284 mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::VOLUME0, &f); 285 mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::VOLUME1, &f); 286 } 287 if (auxFilename) { 288 mixer->setParameter(name, AudioMixer::TRACK, AudioMixer::AUX_BUFFER, 289 (void *) auxAddr); 290 mixer->setParameter(name, AudioMixer::VOLUME, AudioMixer::AUXLEVEL, &f0); 291 mixer->setParameter(name, AudioMixer::RAMP_VOLUME, AudioMixer::AUXLEVEL, &f); 292 } 293 mixer->enable(name); 294 } 295 296 // pump the mixer to process data. 297 size_t i; 298 for (i = 0; i < outputFrames - mixerFrameCount; i += mixerFrameCount) { 299 for (size_t j = 0; j < names.size(); ++j) { 300 mixer->setParameter(names[j], AudioMixer::TRACK, AudioMixer::MAIN_BUFFER, 301 (char *) outputAddr + i * outputFrameSize); 302 if (auxFilename) { 303 mixer->setParameter(names[j], AudioMixer::TRACK, AudioMixer::AUX_BUFFER, 304 (char *) auxAddr + i * auxFrameSize); 305 } 306 } 307 mixer->process(); 308 } 309 outputFrames = i; // reset output frames to the data actually produced. 310 311 // write to files 312 writeFile(outputFilename, outputAddr, 313 outputSampleRate, outputChannels, outputFrames, useMixerFloat); 314 if (auxFilename) { 315 // Aux buffer is always in q4_27 format for O and earlier. 316 // memcpy_to_i16_from_q4_27((int16_t*)auxAddr, (const int32_t*)auxAddr, outputFrames); 317 // Aux buffer is always in float format for P. 318 memcpy_to_i16_from_float((int16_t*)auxAddr, (const float*)auxAddr, outputFrames); 319 writeFile(auxFilename, auxAddr, outputSampleRate, 1, outputFrames, false); 320 } 321 322 delete mixer; 323 free(outputAddr); 324 free(auxAddr); 325 return EXIT_SUCCESS; 326 } 327
