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/*
* Copyright (C) 2003-2009 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 "conf.h"
#include "audio_parser.h"
#include "audio_format.h"
#include "filter_plugin.h"
#include "pcm_volume.h"
#include <glib.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
static const struct config_param *
find_named_config_block(const char *block, const char *name)
{
const struct config_param *param = NULL;
while ((param = config_get_next_param(block, param)) != NULL) {
const char *current_name =
config_get_block_string(param, "name", NULL);
if (current_name != NULL && strcmp(current_name, name) == 0)
return param;
}
return NULL;
}
static struct filter *
load_filter(const char *name)
{
const struct config_param *param;
struct filter *filter;
GError *error = NULL;
param = find_named_config_block("filter", name);
if (param == NULL) {
g_printerr("No such configured filter: %s\n", name);
return false;
}
filter = filter_configured_new(param, &error);
if (filter == NULL) {
g_printerr("Failed to load filter: %s\n", error->message);
g_error_free(error);
return NULL;
}
return filter;
}
int main(int argc, char **argv)
{
struct audio_format audio_format;
bool success;
GError *error = NULL;
struct filter *filter;
const struct audio_format *out_audio_format;
char buffer[4096];
size_t frame_size;
if (argc < 3 || argc > 4) {
g_printerr("Usage: run_filter CONFIG NAME [FORMAT] <IN\n");
return 1;
}
audio_format_init(&audio_format, 44100, 16, 2);
g_thread_init(NULL);
/* read configuration file (mpd.conf) */
config_global_init();
config_read_file(argv[1]);
/* parse the audio format */
if (argc > 3) {
success = audio_format_parse(&audio_format, argv[3], &error);
if (!success) {
g_printerr("Failed to parse audio format: %s\n",
error->message);
g_error_free(error);
return 1;
}
}
/* initialize the filter */
filter = load_filter(argv[2]);
if (filter == NULL)
return 1;
/* open the filter */
out_audio_format = filter_open(filter, &audio_format, &error);
if (out_audio_format == NULL) {
g_printerr("Failed to open filter: %s\n", error->message);
g_error_free(error);
filter_free(filter);
return 1;
}
g_printerr("audio_format=%u:%u:%u\n", out_audio_format->sample_rate,
out_audio_format->bits, out_audio_format->channels);
frame_size = audio_format_frame_size(&audio_format);
/* play */
while (true) {
ssize_t nbytes;
size_t length;
const void *dest;
nbytes = read(0, buffer, sizeof(buffer));
if (nbytes <= 0)
break;
dest = filter_filter(filter, buffer, (size_t)nbytes,
&length, &error);
if (dest == NULL) {
g_printerr("Filter failed: %s\n", error->message);
filter_close(filter);
filter_free(filter);
return 1;
}
nbytes = write(1, dest, length);
if (nbytes < 0) {
g_printerr("Failed to write: %s\n", strerror(errno));
filter_close(filter);
filter_free(filter);
return 1;
}
}
/* cleanup and exit */
filter_close(filter);
filter_free(filter);
config_global_finish();
return 0;
}
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