158 lines
3.8 KiB
C++
158 lines
3.8 KiB
C++
/*
|
|
* Copyright 2003-2019 The Music Player Daemon Project
|
|
* http://www.musicpd.org
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "ConfigGlue.hxx"
|
|
#include "fs/Path.hxx"
|
|
#include "fs/NarrowPath.hxx"
|
|
#include "AudioParser.hxx"
|
|
#include "AudioFormat.hxx"
|
|
#include "filter/LoadOne.hxx"
|
|
#include "filter/Filter.hxx"
|
|
#include "filter/Prepared.hxx"
|
|
#include "pcm/Volume.hxx"
|
|
#include "mixer/MixerControl.hxx"
|
|
#include "system/Error.hxx"
|
|
#include "system/FileDescriptor.hxx"
|
|
#include "util/ConstBuffer.hxx"
|
|
#include "util/StringBuffer.hxx"
|
|
#include "util/RuntimeError.hxx"
|
|
#include "util/PrintException.hxx"
|
|
|
|
#include <memory>
|
|
#include <stdexcept>
|
|
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
void
|
|
mixer_set_volume(gcc_unused Mixer *mixer,
|
|
gcc_unused unsigned volume)
|
|
{
|
|
}
|
|
|
|
static std::unique_ptr<PreparedFilter>
|
|
LoadFilter(const ConfigData &config, const char *name)
|
|
{
|
|
const auto *param = config.FindBlock(ConfigBlockOption::AUDIO_FILTER,
|
|
"name", name);
|
|
if (param == nullptr)
|
|
throw FormatRuntimeError("No such configured filter: %s",
|
|
name);
|
|
|
|
return filter_configured_new(*param);
|
|
}
|
|
|
|
static size_t
|
|
ReadOrThrow(FileDescriptor fd, void *buffer, size_t size)
|
|
{
|
|
auto nbytes = fd.Read(buffer, size);
|
|
if (nbytes < 0)
|
|
throw MakeErrno("Read failed");
|
|
|
|
return nbytes;
|
|
}
|
|
|
|
static size_t
|
|
ReadFrames(FileDescriptor fd, void *_buffer, size_t size, size_t frame_size)
|
|
{
|
|
auto buffer = (uint8_t *)_buffer;
|
|
|
|
size = (size / frame_size) * frame_size;
|
|
|
|
size_t nbytes = ReadOrThrow(fd, buffer, size);
|
|
|
|
const size_t modulo = nbytes % frame_size;
|
|
if (modulo > 0) {
|
|
size_t rest = frame_size - modulo;
|
|
fd.FullRead(buffer + nbytes, rest);
|
|
nbytes += rest;
|
|
}
|
|
|
|
return nbytes;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
try {
|
|
if (argc < 3 || argc > 4) {
|
|
fprintf(stderr, "Usage: run_filter CONFIG NAME [FORMAT] <IN\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
const FromNarrowPath config_path = argv[1];
|
|
|
|
AudioFormat audio_format(44100, SampleFormat::S16, 2);
|
|
|
|
/* read configuration file (mpd.conf) */
|
|
|
|
const auto config = AutoLoadConfigFile(config_path);
|
|
|
|
/* parse the audio format */
|
|
|
|
if (argc > 3)
|
|
audio_format = ParseAudioFormat(argv[3], false);
|
|
|
|
const size_t in_frame_size = audio_format.GetFrameSize();
|
|
|
|
/* initialize the filter */
|
|
|
|
auto prepared_filter = LoadFilter(config, argv[2]);
|
|
|
|
/* open the filter */
|
|
|
|
auto filter = prepared_filter->Open(audio_format);
|
|
|
|
const AudioFormat out_audio_format = filter->GetOutAudioFormat();
|
|
|
|
fprintf(stderr, "audio_format=%s\n",
|
|
ToString(out_audio_format).c_str());
|
|
|
|
/* play */
|
|
|
|
FileDescriptor input_fd(STDIN_FILENO);
|
|
FileDescriptor output_fd(STDOUT_FILENO);
|
|
|
|
while (true) {
|
|
char buffer[4096];
|
|
|
|
ssize_t nbytes = ReadFrames(input_fd, buffer, sizeof(buffer),
|
|
in_frame_size);
|
|
if (nbytes == 0)
|
|
break;
|
|
|
|
auto dest = filter->FilterPCM({(const void *)buffer, (size_t)nbytes});
|
|
output_fd.FullWrite(dest.data, dest.size);
|
|
}
|
|
|
|
while (true) {
|
|
auto dest = filter->Flush();
|
|
if (dest.IsNull())
|
|
break;
|
|
output_fd.FullWrite(dest.data, dest.size);
|
|
}
|
|
|
|
/* cleanup and exit */
|
|
|
|
return EXIT_SUCCESS;
|
|
} catch (...) {
|
|
PrintException(std::current_exception());
|
|
return EXIT_FAILURE;
|
|
}
|