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wavpack: read first byte from wvc stream

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Instead of manually waiting for the input stream to become ready (to
catch server errors), just read the first byte.  Since the
wavpack_input has the capability to push back one byte, we can simply
re-feed it.  Advantage is: decoder_read() handles everything for us,
i.e. waiting for the stream, polling for decoder commands and error
handling.
This commit is contained in:
Max Kellermann 2008-11-04 17:10:03 +01:00
parent 3cf54591e9
commit 097bccd4ae
1 changed files with 13 additions and 25 deletions
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38
src/decoder/wavpack_plugin.c
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@ -431,13 +431,16 @@ static bool wavpack_trydecode(struct input_stream *is)
}
static bool
wavpack_open_wvc(struct decoder *decoder, struct input_stream *is_wvc)
wavpack_open_wvc(struct decoder *decoder, struct input_stream *is_wvc,
struct wavpack_input *wpi)
{
char tmp[MPD_PATH_MAX];
const char *utf8url;
size_t len;
char *wvc_url = NULL;
bool ret;
char first_byte;
size_t nbytes;
/*
* As we use dc->utf8url, this function will be bad for
@ -469,28 +472,15 @@ wavpack_open_wvc(struct decoder *decoder, struct input_stream *is_wvc)
* And we try to buffer in order to get know
* about a possible 404 error.
*/
for (;;) {
if (input_stream_eof(is_wvc)) {
/*
* EOF is reached even without
* a single byte is read...
* So, this is not good :/
*/
input_stream_close(is_wvc);
return false;
}
nbytes = decoder_read(decoder, is_wvc,
&first_byte, sizeof(first_byte));
if (nbytes == 0)
return false;
if (input_stream_buffer(is_wvc) >= 0)
return true;
if (decoder_get_command(decoder) != DECODE_COMMAND_NONE) {
input_stream_close(is_wvc);
return false;
}
/* Save some CPU */
my_usleep(1000);
}
/* push it back */
wavpack_input_init(wpi, decoder, is_wvc);
wpi->last_byte = first_byte;
return true;
}
/*
@ -505,10 +495,8 @@ wavpack_streamdecode(struct decoder * decoder, struct input_stream *is)
int open_flags = OPEN_2CH_MAX | OPEN_NORMALIZE /*| OPEN_STREAMING*/;
struct wavpack_input isp, isp_wvc;
if (wavpack_open_wvc(decoder, &is_wvc)) {
wavpack_input_init(&isp_wvc, decoder, &is_wvc);
if (wavpack_open_wvc(decoder, &is_wvc, &isp_wvc))
open_flags |= OPEN_WVC;
}
wavpack_input_init(&isp, decoder, is);
wpc = WavpackOpenFileInputEx(&mpd_is_reader, &isp, &isp_wvc, error,