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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../output_api.h"
#include "../utils.h"
#include "../log.h"
#include <ao/ao.h>
static int driverInitCount;
typedef struct _AoData {
int writeSize;
int driverId;
ao_option *options;
ao_device *device;
} AoData;
static AoData *newAoData(void)
{
AoData *ret = xmalloc(sizeof(AoData));
ret->device = NULL;
ret->options = NULL;
return ret;
}
static void audioOutputAo_error(void)
{
if (errno == AO_ENOTLIVE) {
ERROR("not a live ao device\n");
} else if (errno == AO_EOPENDEVICE) {
ERROR("not able to open audio device\n");
} else if (errno == AO_EBADOPTION) {
ERROR("bad driver option\n");
}
}
static void *audioOutputAo_initDriver(struct audio_output *ao,
mpd_unused const struct audio_format *audio_format,
ConfigParam * param)
{
ao_info *ai;
char *duplicated;
char *stk1;
char *stk2;
char *n1;
char *key;
char *value;
char *test;
AoData *ad = newAoData();
BlockParam *blockParam;
if ((blockParam = getBlockParam(param, "write_size"))) {
ad->writeSize = strtol(blockParam->value, &test, 10);
if (*test != '\0') {
FATAL("\"%s\" is not a valid write size at line %i\n",
blockParam->value, blockParam->line);
}
} else
ad->writeSize = 1024;
if (driverInitCount == 0) {
ao_initialize();
}
driverInitCount++;
blockParam = getBlockParam(param, "driver");
if (!blockParam || 0 == strcmp(blockParam->value, "default")) {
ad->driverId = ao_default_driver_id();
} else if ((ad->driverId = ao_driver_id(blockParam->value)) < 0) {
FATAL("\"%s\" is not a valid ao driver at line %i\n",
blockParam->value, blockParam->line);
}
if ((ai = ao_driver_info(ad->driverId)) == NULL) {
FATAL("problems getting driver info for device defined at line %i\n"
"you may not have permission to the audio device\n", param->line);
}
DEBUG("using ao driver \"%s\" for \"%s\"\n", ai->short_name,
audio_output_get_name(ao));
blockParam = getBlockParam(param, "options");
if (blockParam) {
duplicated = xstrdup(blockParam->value);
} else
duplicated = xstrdup("");
if (strlen(duplicated)) {
stk1 = NULL;
n1 = strtok_r(duplicated, ";", &stk1);
while (n1) {
stk2 = NULL;
key = strtok_r(n1, "=", &stk2);
if (!key)
FATAL("problems parsing options \"%s\"\n", n1);
/*found = 0;
for(i=0;i<ai->option_count;i++) {
if(strcmp(ai->options[i],key)==0) {
found = 1;
break;
}
}
if(!found) {
FATAL("\"%s\" is not an option for "
"\"%s\" ao driver\n",key,
ai->short_name);
} */
value = strtok_r(NULL, "", &stk2);
if (!value)
FATAL("problems parsing options \"%s\"\n", n1);
ao_append_option(&ad->options, key, value);
n1 = strtok_r(NULL, ";", &stk1);
}
}
free(duplicated);
return ad;
}
static void freeAoData(AoData * ad)
{
ao_free_options(ad->options);
free(ad);
}
static void audioOutputAo_finishDriver(void *data)
{
AoData *ad = (AoData *)data;
freeAoData(ad);
driverInitCount--;
if (driverInitCount == 0)
ao_shutdown();
}
static void audioOutputAo_dropBufferedAudio(mpd_unused void *data)
{
/* not supported by libao */
}
static void audioOutputAo_closeDevice(void *data)
{
AoData *ad = (AoData *)data;
if (ad->device) {
ao_close(ad->device);
ad->device = NULL;
}
}
static int audioOutputAo_openDevice(void *data,
struct audio_format *audio_format)
{
ao_sample_format format;
AoData *ad = (AoData *)data;
if (ad->device) {
audioOutputAo_closeDevice(ad);
}
format.bits = audio_format->bits;
format.rate = audio_format->sample_rate;
format.byte_format = AO_FMT_NATIVE;
format.channels = audio_format->channels;
ad->device = ao_open_live(ad->driverId, &format, ad->options);
if (ad->device == NULL)
return -1;
return 0;
}
/**
* For whatever reason, libao wants a non-const pointer. Let's hope
* it does not write to the buffer, and use the union deconst hack to
* work around this API misdesign.
*/
static int ao_play_deconst(ao_device *device, const void *output_samples,
uint_32 num_bytes)
{
union {
const void *in;
void *out;
} u;
u.in = output_samples;
return ao_play(device, u.out, num_bytes);
}
static int audioOutputAo_play(void *data, const char *playChunk, size_t size)
{
AoData *ad = (AoData *)data;
size_t chunk_size;
if (ad->device == NULL)
return -1;
while (size > 0) {
chunk_size = (size_t)ad->writeSize > size
? size : (size_t)ad->writeSize;
if (ao_play_deconst(ad->device, playChunk, chunk_size) == 0) {
audioOutputAo_error();
ERROR("closing audio device due to write error\n");
audioOutputAo_closeDevice(ad);
return -1;
}
playChunk += chunk_size;
size -= chunk_size;
}
return 0;
}
const struct audio_output_plugin aoPlugin = {
.name = "ao",
.init = audioOutputAo_initDriver,
.finish = audioOutputAo_finishDriver,
.open = audioOutputAo_openDevice,
.play = audioOutputAo_play,
.cancel = audioOutputAo_dropBufferedAudio,
.close = audioOutputAo_closeDevice,
};
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