Attachment 97540 Details for Bug 77595 – A test program causing the daemon to abort

A test program causing the daemon to abort

PulseSeekBug.c (text/plain), 3.34 KB, created by Felipe Sateler on 2014-04-17 21:52:05 UTC

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Creator: Felipe Sateler

Created: 2014-04-17 21:52:05 UTC

Size: 3.34 KB

patch

obsolete

>/* Test program using the asynchronous API.
> * This is demonstrating a problem where the playback under-runs, but
> * yet the stream lists a writable size of 0.  Those are contracidtory,
> * if it is under-running it should have space available, if there isn't
> * any space available it shouldn't be under-running.  Adding some
> * debugging to src/pulse/stream.c shows that the s->requested_bytes
> * is negative, but returns 0 on negative.
> *
> * At least this is the case as of PulseAudio 0.9.21, seems to be fixed
> * in the git code grabbed on 09-18-2010, I didn't look into when it
> * was fixed.
> */
>
>#include <pulse/pulseaudio.h>
>#include <stdio.h>
>#include <string.h>
>#include <unistd.h>
>
>// If it isn't a multiple of the sample size, 4, 8, 12, etc the pulseaudio
>// daemon asserts and dies.
>#define SEEK 1
>
>void writable(pa_stream *p, size_t nbytes, void *userdata)
>{
>	char *buffer;
>
>	/* pa_stream_begin_write "If you place (size_t) -1 in *nbytes on
>	 * invocation the memory size will be chosen automatically (which is
>	 * recommended to do)." (from the OggPulseAudio.h)
>	 */
>	nbytes=(size_t)-1;
>	pa_stream_begin_write(p, (void**)&buffer, &nbytes);
>	
>	// fill the buffer with audio here...
>	memset(buffer, 0, nbytes);
>
>	pa_stream_write(p, buffer, nbytes, NULL, SEEK, PA_SEEK_RELATIVE);
>	printf("wrote %ld, offset %d\n", 1L*nbytes, SEEK);
>}
>
>int main(int argc, char **argv)
>{
>	pa_threaded_mainloop *mainloop=NULL;
>	pa_mainloop_api *api=NULL;
>	pa_context *context=NULL;
>	pa_stream *stream=NULL;
>	pa_sample_spec spec;
>	pa_context_state_t cstate;
>
>	mainloop=pa_threaded_mainloop_new();
>	if(!mainloop)
>	{
>		fprintf(stderr, "Failed to create PulseAudio main loop\n");
>		return 1;
>	}
>	api=pa_threaded_mainloop_get_api(mainloop);
>	pa_threaded_mainloop_start(mainloop);
>
>	pa_threaded_mainloop_lock(mainloop);
>	context=pa_context_new(api, __PRETTY_FUNCTION__);
>	pa_context_connect(context, NULL, (pa_context_flags_t)0, NULL);
>	pa_threaded_mainloop_unlock(mainloop);
>
>	spec.format=PA_SAMPLE_S16LE;
>	spec.rate=48000;
>	spec.channels=2;
>	pa_channel_map map;
>	pa_channel_map_init_auto(&map, spec.channels, PA_CHANNEL_MAP_DEFAULT);
>
>	for(;;)
>	{
>		pa_threaded_mainloop_lock(mainloop);
>		cstate=pa_context_get_state(context);
>		pa_threaded_mainloop_unlock(mainloop);
>		if(cstate>=PA_CONTEXT_READY)
>			break;
>		usleep(1000);
>	}
>
>	pa_threaded_mainloop_lock(mainloop);
>	stream=pa_stream_new(context, __func__, &spec, &map);
>	if(!stream)
>		return 1;
>	pa_stream_set_write_callback(stream, writable, NULL);
>	pa_stream_flags_t flags = (pa_stream_flags_t)(
>		PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_AUTO_TIMING_UPDATE);
>	pa_stream_connect_playback(stream, NULL, NULL, flags, NULL, NULL);
>	pa_threaded_mainloop_unlock(mainloop);
>
>	for(;;)
>	{
>		sleep(1);
>		pa_threaded_mainloop_lock(mainloop);
>		printf("Stream state %d, suspended %d, "
>			"corked %d, writable size %ld\n",
>			pa_stream_get_state(stream),
>			pa_stream_is_suspended(stream),
>			pa_stream_is_corked(stream),
>			1L*pa_stream_writable_size(stream));
>		pa_threaded_mainloop_unlock(mainloop);
>	}
>
>	// shutdown
>	pa_stream_disconnect(stream);
>	pa_stream_unref(stream);
>	if(mainloop)
>	{
>		pa_context_disconnect(context);
>		pa_context_unref(context);
>		context=NULL;
>		pa_threaded_mainloop_free(mainloop);
>		mainloop=NULL;
>		api=NULL; // freed with mainloop
>	}
>	return 0;
>}

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