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wavpack: moved code to wavpack_open_wvc()

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Move everything related to finding and initializing the WVC stream to
wavpack_open_wvc().  This greatly simplifies its error handling and
the function wavpack_streamdecode().
This commit is contained in:
Max Kellermann 2008-08-26 08:27:14 +02:00
parent af58de6543
commit 2e822a577d
1 changed files with 67 additions and 80 deletions
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147
src/inputPlugins/wavpack_plugin.c
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@ -434,6 +434,69 @@ static unsigned int wavpack_trydecode(InputStream *is)
return 1;
}
static int wavpack_open_wvc(struct decoder *decoder,
InputStream *is_wvc)
{
char tmp[MPD_PATH_MAX];
const char *utf8url;
size_t len;
char *wvc_url = NULL;
int ret;
/*
* As we use dc->utf8url, this function will be bad for
* single files. utf8url is not absolute file path :/
*/
utf8url = decoder_get_url(decoder, tmp);
if (utf8url == NULL)
return 0;
len = strlen(utf8url);
if (!len)
return 0;
wvc_url = (char *)xmalloc(len + 2); /* +2: 'c' and EOS */
if (wvc_url == NULL)
return 0;
memcpy(wvc_url, utf8url, len);
wvc_url[len] = 'c';
wvc_url[len + 1] = '\0';
ret = openInputStream(is_wvc, wvc_url);
free(wvc_url);
if (ret)
return 0;
/*
* And we try to buffer in order to get know
* about a possible 404 error.
*/
for (;;) {
if (inputStreamAtEOF(is_wvc)) {
/*
* EOF is reached even without
* a single byte is read...
* So, this is not good :/
*/
closeInputStream(is_wvc);
return 0;
}
if (bufferInputStream(is_wvc) >= 0)
return 1;
if (decoder_get_command(decoder) == DECODE_COMMAND_STOP) {
closeInputStream(is_wvc);
return 0;
}
/* Save some CPU */
my_usleep(1000);
}
}
/*
* Decodes a stream.
*/
@ -443,89 +506,15 @@ static int wavpack_streamdecode(struct decoder * decoder, InputStream *is)
WavpackContext *wpc;
InputStream is_wvc;
int open_flags = OPEN_2CH_MAX | OPEN_NORMALIZE /*| OPEN_STREAMING*/;
char *wvc_url = NULL;
int err;
InputStreamPlus isp, isp_wvc;
int canseek;
/* Try to find wvc */
do {
char tmp[MPD_PATH_MAX];
const char *utf8url;
size_t len;
err = 1;
/*
* As we use dc.utf8url, this function will be bad for
* single files. utf8url is not absolute file path :/
*/
utf8url = decoder_get_url(decoder, tmp);
if (utf8url == NULL) {
break;
}
len = strlen(utf8url);
if (!len) {
break;
}
wvc_url = (char *)xmalloc(len + 2); /* +2: 'c' and EOS */
if (wvc_url == NULL) {
break;
}
memcpy(wvc_url, utf8url, len);
wvc_url[len] = 'c';
wvc_url[len + 1] = '\0';
if (openInputStream(&is_wvc, wvc_url)) {
break;
}
/*
* And we try to buffer in order to get know
* about a possible 404 error.
*/
for (;;) {
if (inputStreamAtEOF(&is_wvc)) {
/*
* EOF is reached even without
* a single byte is read...
* So, this is not good :/
*/
break;
}
if (bufferInputStream(&is_wvc) >= 0) {
err = 0;
break;
}
if (decoder_get_command(decoder) == DECODE_COMMAND_STOP) {
break;
}
/* Save some CPU */
my_usleep(1000);
}
if (err) {
closeInputStream(&is_wvc);
break;
}
if (wavpack_open_wvc(decoder, &is_wvc)) {
initInputStreamPlus(&isp_wvc, decoder, &is_wvc);
open_flags |= OPEN_WVC;
} while (0);
}
canseek = can_seek(&isp);
if (wvc_url != NULL) {
if (err) {
free(wvc_url);
wvc_url = NULL;
} else {
initInputStreamPlus(&isp_wvc, decoder, &is_wvc);
}
}
initInputStreamPlus(&isp, decoder, is);
wpc = WavpackOpenFileInputEx(&mpd_is_reader, &isp, &isp_wvc, error,
@ -539,10 +528,8 @@ static int wavpack_streamdecode(struct decoder * decoder, InputStream *is)
wavpack_decode(decoder, wpc, canseek, NULL);
WavpackCloseFile(wpc);
if (wvc_url != NULL) {
if (open_flags & OPEN_WVC)
closeInputStream(&is_wvc);
free(wvc_url);
}
closeInputStream(is);
return 0;