/**
* Opens the input stream with input_stream_open(), and waits until
* the stream gets ready. If a decoder STOP command is received
* during that, it cancels the operation (but does not close the
* stream).
*
* Unlock the decoder before calling this function.
*
* @return an input_stream on success or if #DECODE_COMMAND_STOP is
* received, NULL on error
*/
static struct input_stream *
decoder_input_stream_open(struct decoder_control *dc, const char *uri)
{
GError *error = NULL;
struct input_stream *is;
is = input_stream_open(uri, &error);
if (is == NULL) {
if (error != NULL) {
g_warning("%s", error->message);
g_error_free(error);
}
return NULL;
}
/* wait for the input stream to become ready; its metadata
will be available then */
while (!is->ready &&
decoder_lock_get_command(dc) != DECODE_COMMAND_STOP) {
int ret;
ret = input_stream_buffer(is, &error);
if (ret < 0) {
input_stream_close(is);
g_warning("%s", error->message);
g_error_free(error);
return NULL;
}
}
return is;
}
static int
dump_input_stream(struct input_stream *is)
{
GError *error = NULL;
char buffer[4096];
size_t num_read;
ssize_t num_written;
/* wait until the stream becomes ready */
while (!is->ready) {
int ret = input_stream_buffer(is, &error);
if (ret < 0) {
/* error */
g_warning("%s", error->message);
g_error_free(error);
return 2;
}
if (ret == 0)
/* nothing was buffered - wait */
g_usleep(10000);
}
/* print meta data */
if (is->mime != NULL)
g_printerr("MIME type: %s\n", is->mime);
/* read data and tags from the stream */
while (!input_stream_eof(is)) {
struct tag *tag = input_stream_tag(is);
if (tag != NULL) {
g_printerr("Received a tag:\n");
tag_save(stderr, tag);
tag_free(tag);
}
num_read = input_stream_read(is, buffer, sizeof(buffer),
&error);
if (num_read == 0) {
if (error != NULL) {
g_warning("%s", error->message);
g_error_free(error);
}
break;
}
num_written = write(1, buffer, num_read);
if (num_written <= 0)
break;
}
return 0;
}
/**
* This is a wrapper for input_stream_buffer(). It assumes that the
* decoder is currently locked, and temporarily unlocks it while
* calling input_stream_buffer(). We shouldn't hold the lock during a
* potentially blocking operation.
*/
static bool
decoder_input_buffer(struct decoder_control *dc, struct input_stream *is)
{
GError *error = NULL;
int ret;
decoder_unlock(dc);
ret = input_stream_buffer(is, &error);
if (ret < 0) {
g_warning("%s", error->message);
g_error_free(error);
}
decoder_lock(dc);
return ret > 0;
}
struct playlist_provider *
playlist_list_open_path(const char *path_fs)
{
GError *error = NULL;
const char *suffix;
struct input_stream *is;
struct playlist_provider *playlist;
assert(path_fs != NULL);
suffix = uri_get_suffix(path_fs);
if (suffix == NULL || !playlist_suffix_supported(suffix))
return NULL;
is = input_stream_open(path_fs, &error);
if (is == NULL) {
if (error != NULL) {
g_warning("%s", error->message);
g_error_free(error);
}
return NULL;
}
while (!is->ready) {
int ret = input_stream_buffer(is, &error);
if (ret < 0) {
input_stream_close(is);
g_warning("%s", error->message);
g_error_free(error);
return NULL;
}
}
playlist = playlist_list_open_stream_suffix(is, suffix);
if (playlist == NULL)
input_stream_close(is);
return playlist;
}
