static void
ao_open(struct audio_output *ao)
{
bool success;
GError *error = NULL;
const struct audio_format *filter_audio_format;
struct audio_format_string af_string;
assert(!ao->open);
assert(ao->pipe != NULL);
assert(ao->chunk == NULL);
assert(audio_format_valid(&ao->in_audio_format));
if (ao->fail_timer != NULL) {
/* this can only happen when this
output thread fails while
audio_output_open() is run in the
player thread */
g_timer_destroy(ao->fail_timer);
ao->fail_timer = NULL;
}
/* enable the device (just in case the last enable has failed) */
if (!ao_enable(ao))
/* still no luck */
return;
/* open the filter */
filter_audio_format = ao_filter_open(ao, &ao->in_audio_format, &error);
if (filter_audio_format == NULL) {
g_warning("Failed to open filter for \"%s\" [%s]: %s",
ao->name, ao->plugin->name, error->message);
g_error_free(error);
ao->fail_timer = g_timer_new();
return;
}
assert(audio_format_valid(filter_audio_format));
ao->out_audio_format = *filter_audio_format;
audio_format_mask_apply(&ao->out_audio_format,
&ao->config_audio_format);
g_mutex_unlock(ao->mutex);
success = ao_plugin_open(ao->plugin, ao->data,
&ao->out_audio_format,
&error);
g_mutex_lock(ao->mutex);
assert(!ao->open);
if (!success) {
g_warning("Failed to open \"%s\" [%s]: %s",
ao->name, ao->plugin->name, error->message);
g_error_free(error);
ao_filter_close(ao);
ao->fail_timer = g_timer_new();
return;
}
convert_filter_set(ao->convert_filter, &ao->out_audio_format);
ao->open = true;
g_debug("opened plugin=%s name=\"%s\" "
"audio_format=%s",
ao->plugin->name, ao->name,
audio_format_to_string(&ao->out_audio_format, &af_string));
if (!audio_format_equals(&ao->in_audio_format,
&ao->out_audio_format))
g_debug("converting from %s",
audio_format_to_string(&ao->in_audio_format,
&af_string));
}
int main(int argc, char **argv)
{
struct audio_output ao;
struct audio_format audio_format;
struct audio_format_string af_string;
bool success;
GError *error = NULL;
char buffer[4096];
ssize_t nbytes;
size_t frame_size, length = 0, play_length, consumed;
if (argc < 3 || argc > 4) {
g_printerr("Usage: run_output 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;
}
/* initialize the audio output */
if (!load_audio_output(&ao, argv[2]))
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;
}
}
/* open the audio output */
success = ao_plugin_open(ao.plugin, ao.data, &audio_format, &error);
if (!success) {
g_printerr("Failed to open audio output: %s\n",
error->message);
g_error_free(error);
return 1;
}
g_printerr("audio_format=%s\n",
audio_format_to_string(&audio_format, &af_string));
frame_size = audio_format_frame_size(&audio_format);
/* play */
while (true) {
if (length < sizeof(buffer)) {
nbytes = read(0, buffer + length, sizeof(buffer) - length);
if (nbytes <= 0)
break;
length += (size_t)nbytes;
}
play_length = (length / frame_size) * frame_size;
if (play_length > 0) {
consumed = ao_plugin_play(ao.plugin, ao.data,
buffer, play_length,
&error);
if (consumed == 0) {
g_printerr("Failed to play: %s\n",
error->message);
g_error_free(error);
return 1;
}
assert(consumed <= length);
assert(consumed % frame_size == 0);
length -= consumed;
memmove(buffer, buffer + consumed, length);
}
}
/* cleanup and exit */
ao_plugin_close(ao.plugin, ao.data);
ao_plugin_finish(ao.plugin, ao.data);
g_mutex_free(ao.mutex);
config_global_finish();
return 0;
}
