c412d6251e
This patch prepares support for floating point samples (and probably other formats). It changes the meaning of the "bits" attribute from a bit count to a symbolic value.
174 lines
3.9 KiB
C
174 lines
3.9 KiB
C
/*
|
|
* 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 "config.h"
|
|
#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;
|
|
struct audio_format_string af_string;
|
|
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, SAMPLE_FORMAT_S16, 2);
|
|
|
|
g_thread_init(NULL);
|
|
|
|
/* read configuration file (mpd.conf) */
|
|
|
|
config_global_init();
|
|
success = config_read_file(argv[1], &error);
|
|
if (!success) {
|
|
g_printerr("%s:", error->message);
|
|
g_error_free(error);
|
|
return 1;
|
|
}
|
|
|
|
/* parse the audio format */
|
|
|
|
if (argc > 3) {
|
|
success = audio_format_parse(&audio_format, argv[3],
|
|
false, &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=%s\n",
|
|
audio_format_to_string(out_audio_format, &af_string));
|
|
|
|
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;
|
|
}
|