72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* This program is a command line interface to MPD's software volume
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* library (pcm_volume.c).
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*
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*/
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#include "config.h"
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#include "pcm/PcmVolume.hxx"
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#include "AudioParser.hxx"
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#include "audio_format.h"
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#include "stdbin.h"
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#include <glib.h>
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#include <stddef.h>
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#include <unistd.h>
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int main(int argc, char **argv)
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{
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GError *error = NULL;
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struct audio_format audio_format;
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bool ret;
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static char buffer[4096];
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ssize_t nbytes;
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if (argc > 2) {
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g_printerr("Usage: software_volume [FORMAT] <IN >OUT\n");
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return 1;
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}
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if (argc > 1) {
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ret = audio_format_parse(&audio_format, argv[1],
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false, &error);
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if (!ret) {
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g_printerr("Failed to parse audio format: %s\n",
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error->message);
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return 1;
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}
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} else
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audio_format_init(&audio_format, 48000, SAMPLE_FORMAT_S16, 2);
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while ((nbytes = read(0, buffer, sizeof(buffer))) > 0) {
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if (!pcm_volume(buffer, nbytes,
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sample_format(audio_format.format),
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PCM_VOLUME_1 / 2)) {
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g_printerr("pcm_volume() has failed\n");
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return 2;
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}
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G_GNUC_UNUSED ssize_t ignored = write(1, buffer, nbytes);
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}
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}
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