static const struct audio_format *
ao_filter_open(struct audio_output *ao,
struct audio_format *audio_format,
GError **error_r)
{
assert(audio_format_valid(audio_format));
/* the replay_gain filter cannot fail here */
if (ao->replay_gain_filter != NULL)
filter_open(ao->replay_gain_filter, audio_format, error_r);
if (ao->other_replay_gain_filter != NULL)
filter_open(ao->other_replay_gain_filter, audio_format,
error_r);
const struct audio_format *af
= filter_open(ao->filter, audio_format, error_r);
if (af == NULL) {
if (ao->replay_gain_filter != NULL)
filter_close(ao->replay_gain_filter);
if (ao->other_replay_gain_filter != NULL)
filter_close(ao->other_replay_gain_filter);
}
return af;
}
static void
ao_filter_close(struct audio_output *ao)
{
if (ao->replay_gain_filter != NULL)
filter_close(ao->replay_gain_filter);
if (ao->other_replay_gain_filter != NULL)
filter_close(ao->other_replay_gain_filter);
filter_close(ao->filter);
}
static void
autoconvert_filter_close(struct filter *_filter)
{
struct autoconvert_filter *filter =
(struct autoconvert_filter *)_filter;
if (filter->convert != NULL) {
filter_close(filter->convert);
filter_free(filter->convert);
}
filter_close(filter->filter);
}
static const struct audio_format *
autoconvert_filter_open(struct filter *_filter,
struct audio_format *in_audio_format,
GError **error_r)
{
struct autoconvert_filter *filter =
(struct autoconvert_filter *)_filter;
const struct audio_format *out_audio_format;
assert(audio_format_valid(in_audio_format));
/* open the "real" filter */
filter->in_audio_format = *in_audio_format;
out_audio_format = filter_open(filter->filter,
&filter->in_audio_format, error_r);
if (out_audio_format == NULL)
return NULL;
/* need to convert? */
if (!audio_format_equals(&filter->in_audio_format, in_audio_format)) {
/* yes - create a convert_filter */
struct audio_format audio_format2 = *in_audio_format;
const struct audio_format *audio_format3;
filter->convert = filter_new(&convert_filter_plugin, NULL,
error_r);
if (filter->convert == NULL) {
filter_close(filter->filter);
return NULL;
}
audio_format3 = filter_open(filter->convert, &audio_format2,
error_r);
if (audio_format3 == NULL) {
filter_free(filter->convert);
filter_close(filter->filter);
return NULL;
}
assert(audio_format_equals(&audio_format2, in_audio_format));
convert_filter_set(filter->convert, &filter->in_audio_format);
} else
/* no */
filter->convert = NULL;
return out_audio_format;
}
static void
chain_close_child(gpointer data, G_GNUC_UNUSED gpointer user_data)
{
struct filter *filter = data;
filter_close(filter);
}
static const struct audio_format *
chain_open_child(struct filter *filter,
const struct audio_format *prev_audio_format,
GError **error_r)
{
struct audio_format conv_audio_format = *prev_audio_format;
const struct audio_format *next_audio_format;
next_audio_format = filter_open(filter, &conv_audio_format, error_r);
if (next_audio_format == NULL)
return NULL;
if (!audio_format_equals(&conv_audio_format, prev_audio_format)) {
struct audio_format_string s;
filter_close(filter);
g_set_error(error_r, filter_quark(), 0,
"Audio format not supported by filter '%s': %s",
filter->plugin->name,
audio_format_to_string(prev_audio_format, &s));
return NULL;
}
return next_audio_format;
}
static void
ao_reopen_filter(struct audio_output *ao)
{
const struct audio_format *filter_audio_format;
GError *error = NULL;
filter_close(ao->filter);
filter_audio_format = filter_open(ao->filter, &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);
/* this is a little code duplication fro ao_close(),
but we cannot call this function because we must
not call filter_close(ao->filter) again */
ao->pipe = NULL;
ao->chunk = NULL;
ao->open = false;
ao->fail_timer = g_timer_new();
g_mutex_unlock(ao->mutex);
ao_plugin_close(ao->plugin, ao->data);
g_mutex_lock(ao->mutex);
return;
}
convert_filter_set(ao->convert_filter, &ao->out_audio_format);
}
static void
quh_signal_handler (int signum)
{
switch (signum)
{
case SIGINT:
case SIGTERM:
if (quh.filter_chain)
filter_close (quh.filter_chain, &quh.nfo);
fflush (stdout);
fputs ("Quh: break", stderr);
exit (0);
break;
default:
break;
}
}
/**
* Close all filters in the chain until #until is reached. #until
* itself is not closed.
*/
static void
chain_close_until(struct filter_chain *chain, const struct filter *until)
{
GSList *i = chain->children;
struct filter *filter;
while (true) {
/* this assertion fails if #until does not exist
(anymore) */
assert(i != NULL);
if (i->data == until)
/* don't close this filter */
break;
/* close this filter */
filter = i->data;
filter_close(filter);
i = g_slist_next(i);
}
}
static void
ao_close(struct audio_output *ao, bool drain)
{
assert(ao->open);
ao->pipe = NULL;
ao->chunk = NULL;
ao->open = false;
g_mutex_unlock(ao->mutex);
if (drain)
ao_plugin_drain(ao->plugin, ao->data);
else
ao_plugin_cancel(ao->plugin, ao->data);
ao_plugin_close(ao->plugin, ao->data);
filter_close(ao->filter);
g_mutex_lock(ao->mutex);
g_debug("closed plugin=%s name=\"%s\"", ao->plugin->name, ao->name);
}
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);
/* initialize GLib */
g_thread_init(NULL);
g_log_set_default_handler(my_log_func, 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;
}
int main(int argc, char **argv){
/* extract program name from path. e.g. /path/to/MArCd -> MArCd */
const char* separator = strrchr(argv[0], '/');
if ( separator ){
program_name = separator + 1;
} else {
program_name = argv[0];
}
struct filter filter;
if ( filter_from_argv(&argc, argv, &filter) != 0 ){
return 0; /* error already shown */
}
int op, option_index = -1;
while ( (op = getopt_long(argc, argv, shortopts, longopts, &option_index)) != -1 ){
switch (op){
case 0: /* long opt */
case '?': /* unknown opt */
break;
case '1':
case '2':
case '3':
case '4':
{
const unsigned int mask = (7<<FORMAT_LAYER_BIT);
flags &= ~mask; /* reset all layer bits */
flags |= (op-'0')<<FORMAT_LAYER_BIT;
break;
}
case 'd': /* --calender */
flags |= FORMAT_DATE_STR | FORMAT_DATE_UTC;
break;
case 'D': /* --localtime */
flags |= FORMAT_DATE_STR | FORMAT_DATE_LOCALTIME;
break;
case 'a': /* --absolute */
flags &= ~FORMAT_REL_TIMESTAMP;
break;
case 'r': /* --relative */
flags |= FORMAT_REL_TIMESTAMP;
break;
case 'H': /* --headers */
flags |= FORMAT_HEADER;
break;
case 'p': /* --packets */
max_packets = atoi(optarg);
break;
case 'c': /* --packets */
max_matched_packets = atoi(optarg);
break;
case 't': /* --timeout */
{
int tmp = atoi(optarg);
timeout.tv_sec = tmp / 1000;
timeout.tv_usec = tmp % 1000 * 1000;
}
break;
case 'x': /* --hexdump */
flags |= FORMAT_HEXDUMP;
break;
case 'i': /* --iface */
iface = optarg;
break;
case ARGUMENT_VERSION: /* --version */
show_version();
return 0;
case 'h': /* --help */
show_usage();
return 0;
default:
fprintf (stderr, "%s: argument '-%c' declared but not handled\n", argv[0], op);
}
}
int ret;
/* Open stream(s) */
struct stream* stream;
if ( (ret=stream_from_getopt(&stream, argv, optind, argc, iface, "-", program_name, 0)) != 0 ) {
return ret; /* Error already shown */
}
const stream_stat_t* stat = stream_get_stat(stream);
stream_print_info(stream, stderr);
/* handle C-c */
signal(SIGINT, handle_sigint);
/* setup formatter */
struct format format;
format_setup(&format, flags);
uint64_t matched = 0;
while ( keep_running ) {
/* A short timeout is used to allow the application to "breathe", i.e
* terminate if SIGINT was received. */
struct timeval tv = timeout;
/* Read the next packet */
cap_head* cp;
ret = stream_read(stream, &cp, NULL, &tv);
if ( ret == EAGAIN ){
continue; /* timeout */
} else if ( ret != 0 ){
break; /* shutdown or error */
}
/* identify connection even if filter doesn't match so id will be
* deterministic when changing the filter */
connection_id(cp);
if ( filter_match(&filter, cp->payload, cp) ){
format_pkg(stdout, &format, cp);
matched++;
} else {
format_ignore(stdout, &format, cp);
}
if ( max_packets > 0 && stat->matched >= max_packets) {
/* Read enough pkts lets break. */
break;
}
if ( max_matched_packets > 0 && matched >= max_matched_packets) {
/* Read enough pkts lets break. */
break;
}
}
/* if ret == -1 the stream was closed properly (e.g EOF or TCP shutdown)
* In addition EINTR should not give any errors because it is implied when the
* user presses C-c */
if ( ret > 0 && ret != EINTR ){
fprintf(stderr, "stream_read() returned 0x%08X: %s\n", ret, caputils_error_string(ret));
}
/* Write stats */
fprintf(stderr, "%"PRIu64" packets read.\n", stat->read);
fprintf(stderr, "%"PRIu64" packets matched filter.\n", matched);
/* Release resources */
stream_close(stream);
filter_close(&filter);
return 0;
}
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->fail_timer == NULL);
assert(ao->pipe != NULL);
assert(ao->chunk == 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 = filter_open(ao->filter, &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;
}
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);
filter_close(ao->filter);
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));
}