media/cast/test/utility/generate_timecode_audio.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <algorithm>
   6 #include <cstdio>
   7 #include <cstdlib>
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/logging.h"
  12 #include "media/cast/test/utility/audio_utility.h"
  13
  14 const size_t kSamplingFrequency = 48000;
  15
  16 int main(int argc, char **argv) {
  17   if (argc < 3) {
  18     fprintf(stderr, "Usage: %s <fps> <frames> >output.s16le\n", argv[0]);
  19     exit(1);
  20   }
  21   int fps = atoi(argv[1]);
  22   const uint32 frames = static_cast<uint32>(std::max(0, atoi(argv[2])));
  23   std::vector<float> samples(kSamplingFrequency / fps);
  24   size_t num_samples = 0;
  25   for (uint32 frame_id = 1; frame_id <= frames; frame_id++) {
  26     CHECK(media::cast::EncodeTimestamp(
  27         frame_id, num_samples, samples.size(), &samples.front()));
  28     num_samples += samples.size();
  29     for (size_t i = 0; i < samples.size(); ++i) {
  30       const int16 sample_s16 = static_cast<int16>(samples[i] * kint16max);
  31       putchar(sample_s16 & 0xff);
  32       putchar(sample_s16 >> 8);
  33       putchar(sample_s16 & 0xff);
  34       putchar(sample_s16 >> 8);
  35     }
  36   }
  37 }