Dear Lixin,
On 20.05.2015 04:10, golden wrote:
> Dear PulseAudio forks,
>
>
> I`m making a function to get the buffer latency of pa_stream(with
> PA_STREAM_AUTO_TIMING_UPDATE flag), here is what it looks like
What type of mainloop are you using?
>
>
> void operation_done_callback(pa_stream* , bool, void*)
> {
> LOGD("operation_done");
> }
>
> int64_t audiostream::getBufferLatencySize()
> {
> // m_stream is a pointer of pa_stream
> pa_operation* o = pa_stream_update_timing_info(m_stream,
> operation_done_callback, this);
> LOGD("enter PA_WAIT_OPEARION2DONE loop");
> if (o != NULL) {
> while (sync && pa_operation_get_state(o) !=
> PA_OPERATION_DONE)
> ;
Where does sync come from?
Maybe you try
while (sync && pa_operation_get_state(o) == PA_OPERATION_RUNNING)
instead, then at least the function should always return. The way you
implemented it, the function will never return if pa_operation_get_state()
returns PA_OPERATION_CANCELLED.
> pa_operation_unref(o);
> o = NULL;
> } else {
> LOGD("PA_WAIT_OPEARION2DONE operation is NULL");
> }
>
> LOGD("exit PA_WAIT_OPEARION2DONE loop");
>
> const pa_timing_info* t = pa_stream_get_timing_info(s);
> if (!t) {
> return -1;
> }
> return t->write_index - t->read_index;
> }
>
> I want that the user can get the accurate result when he calls
> this function,
> so every time if user called getBufferLatencySize, I call
> pa_stream_update_timing_info and wait this operation done, and this
> function is called in user thread.
>
> Sometimes this operation is never finished, and the operation
> done callback is never called.
>
> Don't know what I'm doing wrong, any advice will be appreciated,
> Thanks!
>
>
>
>
> BR,
> Lixin
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