mirror of https://github.com/davisking/dlib.git
91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
|
// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
|
||
|
/*
|
||
|
|
||
|
This is an example illustrating the use of the ffmpeg wrappers.
|
||
|
It attempts to read audio from a microphone if available, and saves the audio to wav.
|
||
|
*/
|
||
|
|
||
|
#include <iostream>
|
||
|
#include <chrono>
|
||
|
#include <dlib/media.h>
|
||
|
#include <dlib/cmd_line_parser.h>
|
||
|
|
||
|
using namespace std;
|
||
|
using namespace std::chrono;
|
||
|
using namespace std::chrono_literals;
|
||
|
using namespace dlib;
|
||
|
using namespace dlib::ffmpeg;
|
||
|
|
||
|
int main(const int argc, const char** argv)
|
||
|
try
|
||
|
{
|
||
|
command_line_parser parser;
|
||
|
parser.add_option("t", "capture time in seconds", 1);
|
||
|
parser.add_option("i", "input microphone device. E.g. hw:0,0", 1);
|
||
|
parser.add_option("o", "output audio file. E.g. recording.m4a, recording.wav", 1);
|
||
|
parser.add_option("codec", "audio codec. E.g. aac, pcm_s16le", 1);
|
||
|
|
||
|
parser.set_group_name("Help Options");
|
||
|
parser.add_option("h", "alias of --help");
|
||
|
parser.add_option("help", "display this message and exit");
|
||
|
|
||
|
parser.parse(argc, argv);
|
||
|
const char* one_time_opts[] = {"t", "i", "o", "codec"};
|
||
|
parser.check_one_time_options(one_time_opts);
|
||
|
|
||
|
if (parser.option("h") || parser.option("help"))
|
||
|
{
|
||
|
parser.print_options();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
const seconds time{get_option(parser, "t", 1)};
|
||
|
const std::string device = get_option(parser, "i", "hw:0,0");
|
||
|
const std::string filename = get_option(parser, "o", "recording.m4a");
|
||
|
const std::string codec = get_option(parser, "codec", "aac");
|
||
|
|
||
|
// Open microphone
|
||
|
demuxer cap([&] {
|
||
|
demuxer::args args;
|
||
|
args.filepath = device;
|
||
|
args.input_format = "alsa";
|
||
|
return args;
|
||
|
}());
|
||
|
|
||
|
if (!cap.is_open())
|
||
|
{
|
||
|
cout << "Failed to open device: " << device << '\n';
|
||
|
return EXIT_FAILURE;
|
||
|
}
|
||
|
|
||
|
// Create WAV file
|
||
|
muxer writer([&] {
|
||
|
muxer::args args;
|
||
|
args.filepath = filename;
|
||
|
args.enable_image = false;
|
||
|
args.args_audio.codec_name = codec;
|
||
|
args.args_audio.sample_rate = cap.sample_rate();
|
||
|
args.args_audio.channel_layout = cap.channel_layout();
|
||
|
args.args_audio.fmt = cap.sample_fmt();
|
||
|
return args;
|
||
|
}());
|
||
|
|
||
|
if (!writer.is_open())
|
||
|
{
|
||
|
cout << "Failed to open wav file" << endl;
|
||
|
return EXIT_FAILURE;
|
||
|
}
|
||
|
|
||
|
// Pull and push
|
||
|
const auto start = high_resolution_clock::now();
|
||
|
frame f;
|
||
|
while (cap.read(f) && (high_resolution_clock::now() - start) < time)
|
||
|
writer.push(std::move(f));
|
||
|
|
||
|
return EXIT_SUCCESS;
|
||
|
}
|
||
|
catch (const std::exception& e)
|
||
|
{
|
||
|
printf("%s\n", e.what());
|
||
|
return EXIT_FAILURE;
|
||
|
}
|