Is even Phonon really used for snappy/lightweight audio playback?
It *appears* that PulseAudio is usable according to here:
http://maemo.org/development/sdks/maemo_5_api_documentation/
With the code below on host, I can get a wav file to play. That same wav
file won't play when I move everything to scratchbox... I get the
following...
[sbox-FREMANTLE_X86: ~/test2] > fakeroot run-standalone.sh ./test2 cat1.wav
main.cpp: pa_simple_new() failed: Connection refused
Does anyone know what could be wrong?
I compiled with qmake -project and added the pulseaudio-simple library with
LIBS+=
--------------------CODE START------------------
/***
This file is part of PulseAudio.
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <pulse/simple.h>
#include <pulse/error.h>
#include <pulse/gccmacro.h>
#define BUFSIZE 1024
int main(int argc, char*argv[]) {
/* The Sample format to use */
/*static const pa_sample_spec ss = {
.format = PA_SAMPLE_S16LE,
.rate = 44100,
.channels = 2
};*/
static const pa_sample_spec ss = {PA_SAMPLE_U8, 22050, 1};
pa_simple *s = NULL;
int ret = 1;
int error;
/* replace STDIN with the specified file if needed */
if (argc > 1) {
int fd;
if ((fd = open(argv[1], O_RDONLY)) < 0) {
fprintf(stderr, __FILE__": open() failed: %s\n",
strerror(errno));
goto finish;
}
if (dup2(fd, STDIN_FILENO) < 0) {
fprintf(stderr, __FILE__": dup2() failed: %s\n",
strerror(errno));
goto finish;
}
close(fd);
}
/* Create a new playback stream */
if (!(s = pa_simple_new(NULL, argv[0], PA_STREAM_PLAYBACK, NULL,
"playback", &ss, NULL, NULL, &error))) {
fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n",
pa_strerror(error));
goto finish;
}
for (;;) {
uint8_t buf[BUFSIZE];
ssize_t r;
#if 0
pa_usec_t latency;
if ((latency = pa_simple_get_latency(s, &error)) == (pa_usec_t) -1)
{
fprintf(stderr, __FILE__": pa_simple_get_latency() failed:
%s\n", pa_strerror(error));
goto finish;
}
fprintf(stderr, "%0.0f usec \r", (float)latency);
#endif
/* Read some data ... */
if ((r = read(STDIN_FILENO, buf, sizeof(buf))) <= 0) {
if (r == 0) /* EOF */
break;
fprintf(stderr, __FILE__": read() failed: %s\n",
strerror(errno));
goto finish;
}
/* ... and play it */
if (pa_simple_write(s, buf, (size_t) r, &error) < 0) {
fprintf(stderr, __FILE__": pa_simple_write() failed: %s\n",
pa_strerror(error));
goto finish;
}
}
/* Make sure that every single sample was played */
if (pa_simple_drain(s, &error) < 0) {
fprintf(stderr, __FILE__": pa_simple_drain() failed: %s\n",
pa_strerror(error));
goto finish;
}
ret = 0;
finish:
if (s)
pa_simple_free(s);
return ret;
}
------------------CODE END-------------------
On Wed, Oct 28, 2009 at 5:31 PM, Antonio Aloisio
<[email protected]>wrote:
> Hi,
> You can use phonon to play video and sound with Qt for fremantle.
> It's available in current 4.5 community port as well as in the official 4.6
> port.
> It's cross-platform, anyhow you can read more about that at:
> http://doc.trolltech.com/4.5/phonon-overview.html
>
> Br,
> Antonio
>
>
> On Wed, Oct 28, 2009 at 5:12 PM, Tim Teulings <[email protected]> wrote:
>
>> Hello!
>>
>> > Isn't it a bit of an overkill to set up an entire GST pipeline just to
>> > play
>> > a blip sound?
>>
>> Yes, but if you want to play your own sound or any sound on the filesystem
>> this seems the
>> way to go (libcanberra is for predefined sounds for predefined events).
>> Lower level ways are likely forbitten, higher level ways likely require
>> more code.
>>
>> > Is there something more lightweight?
>>
>> You can use "playbin" (or playbin2?) for simplifing the pipeline building
>> process. That still
>> makes it a number of lines of code (but of course you will wrap that into
>> a
>> helper method :-)).
>>
>> --
>> Gruß...
>> Tim
>> _______________________________________________
>> maemo-developers mailing list
>> [email protected]
>> https://lists.maemo.org/mailman/listinfo/maemo-developers
>>
>
>
>
> --
>
> Pablo Picasso<http://www.brainyquote.com/quotes/authors/p/pablo_picasso.html>
> - "Computers are useless. They can only give you answers."
> _______________________________________________
> maemo-developers mailing list
> [email protected]
> https://lists.maemo.org/mailman/listinfo/maemo-developers
>
>
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