52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
// Copyright The Music Player Daemon Project
|
|
|
|
/*
|
|
* This program is a command line interface to MPD's software volume
|
|
* library (pcm_volume.c).
|
|
*
|
|
*/
|
|
|
|
#include "pcm/Volume.hxx"
|
|
#include "pcm/AudioParser.hxx"
|
|
#include "pcm/AudioFormat.hxx"
|
|
#include "util/PrintException.hxx"
|
|
|
|
#include <stdio.h>
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
try {
|
|
static std::byte buffer[4096];
|
|
ssize_t nbytes;
|
|
|
|
if (argc > 2) {
|
|
fprintf(stderr, "Usage: software_volume [FORMAT] <IN >OUT\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
AudioFormat audio_format(48000, SampleFormat::S16, 2);
|
|
if (argc > 1)
|
|
audio_format = ParseAudioFormat(argv[1], false);
|
|
|
|
PcmVolume pv;
|
|
const auto out_sample_format = pv.Open(audio_format.format, false);
|
|
|
|
if (out_sample_format != audio_format.format)
|
|
fprintf(stderr, "Converting to %s\n",
|
|
sample_format_to_string(out_sample_format));
|
|
|
|
while ((nbytes = read(0, buffer, sizeof(buffer))) > 0) {
|
|
auto dest = pv.Apply({buffer, size_t(nbytes)});
|
|
[[maybe_unused]] ssize_t ignored = write(1, dest.data(), dest.size());
|
|
}
|
|
|
|
pv.Close();
|
|
} catch (...) {
|
|
PrintException(std::current_exception());
|
|
return EXIT_FAILURE;
|
|
}
|