static bool
wavpack_open_wvc(struct decoder *decoder, struct input_stream *is_wvc,
struct wavpack_input *wpi)
{
char *utf8url;
char *wvc_url = NULL;
bool ret;
char first_byte;
size_t nbytes;
/*
* As we use dc->utf8url, this function will be bad for
* single files. utf8url is not absolute file path :/
*/
utf8url = decoder_get_uri(decoder);
if (utf8url == NULL) {
return false;
}
wvc_url = g_strconcat(utf8url, "c", NULL);
g_free(utf8url);
ret = input_stream_open(is_wvc, wvc_url);
g_free(wvc_url);
if (!ret) {
return false;
}
/*
* And we try to buffer in order to get know
* about a possible 404 error.
*/
nbytes = decoder_read(
decoder, is_wvc, &first_byte, sizeof(first_byte)
);
if (nbytes == 0) {
input_stream_close(is_wvc);
return false;
}
/* push it back */
wavpack_input_init(wpi, decoder, is_wvc);
wpi->last_byte = first_byte;
return true;
}
static struct input_stream *
wavpack_open_wvc(struct decoder *decoder, const char *uri,
struct wavpack_input *wpi)
{
struct input_stream *is_wvc;
char *wvc_url = NULL;
char first_byte;
size_t nbytes;
/*
* As we use dc->utf8url, this function will be bad for
* single files. utf8url is not absolute file path :/
*/
if (uri == NULL)
return false;
wvc_url = g_strconcat(uri, "c", NULL);
is_wvc = input_stream_open(wvc_url, NULL);
g_free(wvc_url);
if (is_wvc == NULL)
return NULL;
/*
* And we try to buffer in order to get know
* about a possible 404 error.
*/
nbytes = decoder_read(
decoder, is_wvc, &first_byte, sizeof(first_byte)
);
if (nbytes == 0) {
input_stream_close(is_wvc);
return NULL;
}
/* push it back */
wavpack_input_init(wpi, decoder, is_wvc);
wpi->last_byte = first_byte;
return is_wvc;
}
/*
* Decodes a stream.
*/
static void
wavpack_streamdecode(struct decoder * decoder, struct input_stream *is)
{
char error[ERRORLEN];
WavpackContext *wpc;
struct input_stream *is_wvc;
int open_flags = OPEN_NORMALIZE;
struct wavpack_input isp, isp_wvc;
bool can_seek = is->seekable;
is_wvc = wavpack_open_wvc(decoder, is->uri, &isp_wvc);
if (is_wvc != NULL) {
open_flags |= OPEN_WVC;
can_seek &= is_wvc->seekable;
}
if (!can_seek) {
open_flags |= OPEN_STREAMING;
}
wavpack_input_init(&isp, decoder, is);
wpc = WavpackOpenFileInputEx(
&mpd_is_reader, &isp,
open_flags & OPEN_WVC ? &isp_wvc : NULL,
error, open_flags, 23
);
if (wpc == NULL) {
g_warning("failed to open WavPack stream: %s\n", error);
return;
}
wavpack_decode(decoder, wpc, can_seek);
WavpackCloseFile(wpc);
if (open_flags & OPEN_WVC) {
input_stream_close(is_wvc);
}
}
