Hello.
My configuration:
mashine at91sam9263
OS linux-2.6.28
sound system alsa
driver ac97c
When I play the files through playfile - everything works fine.
but when I'm the same file played through resamlefile - played only the
first frame.
After that audio stream freezes.
I found the FAQ on the site with description of the work through
splitcomb and rewrote the source code like this:
------cut---------
/* Calculate number of samples per frame to be taken from file port */
ptime = samples_per_frame * 1000 / sampling_rate;
/* Create the file port. */
status = pjmedia_wav_player_port_create( pool, argv[pj_optind], ptime, 0,
0, &file_port);
if (status != PJ_SUCCESS) {
app_perror(THIS_FILE, "Unable to open file", status);
return 1;
}
/* File must have same number of channels. */
if (file_port->info.channel_count != (unsigned)channel_count) {
PJ_LOG(3,(THIS_FILE, "Error: file has different number of channels. "
"Perhaps you'd need -c option?"));
pjmedia_port_destroy(file_port);
return 1;
}
/* Create the resample port. */
status = pjmedia_resample_port_create( pool, file_port,
sampling_rate, 0,
&resample_port);
if (status != PJ_SUCCESS) {
app_perror(THIS_FILE, "Unable to create resample port", status);
return 1;
}
pjmedia_splitcomb_create(
pool,
sampling_rate, /*CLOCK_RATE*/
1,
samples_per_frame, /*SAMPLES_PER_FRAME*/
bits_per_sample, /*BITS*/
0,
&splitcomb
);
pjmedia_splitcomb_create_rev_channel(
pool,
splitcomb,
0,
0,
&rev
); /* Create sound player port. */
status = pjmedia_snd_port_create(
pool, /* pool */
dev_id, /* device */
dev_id, /* device */
sampling_rate, /* clock rate. */
channel_count, /* # of channels. */
samples_per_frame, /* samples per frame. */
bits_per_sample, /* bits per sample. */
0, /* options */
&snd_port /* returned port */
);
if (status != PJ_SUCCESS) {
app_perror(THIS_FILE, "Unable to open sound device", status);
return 1;
}
/* Connect resample port to sound device */
status = pjmedia_snd_port_connect( snd_port, splitcomb);
if (status != PJ_SUCCESS) {
app_perror(THIS_FILE, "Error connecting sound ports", status);
return 1;
}
pjmedia_master_port_create (pool, rev, resample_port, 0, &m);
pjmedia_master_port_start (m);
/* Dump memory usage */
dump_pool_usage(THIS_FILE, &cp);
------cut---------
Out of program:
------cut---------
10:17:06.380 os_core_unix.c pjlib 1.8.10 for POSIX initialized
10:17:06.509 pa_dev.c PortAudio sound library initialized, status=0
10:17:06.509 pa_dev.c PortAudio host api count=1
10:17:06.509 pa_dev.c Sound device count=1
10:17:06.511 pjlib select() I/O Queue created (0x7601c)
10:17:06.515 wav_player.c File player 'Front_Center.wav' created: samp.rate=48000, ch=1, bufsize=4KB, filesize=137KB
10:17:06.515 resample.c resample created: high qualiy, large filter, in/out rate=48000/16000
10:17:06.516 resample.c resample created: high qualiy, large filter, in/out rate=16000/48000
10:17:06.539 pa_dev.c Opened device /dev/dsp(OSS)//dev/dsp(OSS) for recording and playback, sample rate=16000, ch=1, bits=16, 320 samples per frame, input latency=96 ms, output latency=96 ms
10:17:06.539 pa_dev.c Starting /dev/dsp stream..
10:17:06.573 pa_dev.c Recorder thread started
10:17:06.573 os_core_unix.c Info: possibly re-registering existing thread
10:17:06.573 pa_dev.c Player thread started
10:17:06.574 pa_dev.c Done, status=0
10:17:06.574 resampleplay.c Total pool memory allocated=67 KB, used=63 KB
10:17:06.594 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:06.607 scombdb-up Underflow, buf_cnt=0, will generate 1 frame
10:17:06.630 scombdb-up Underflow, buf_cnt=0, will generate 1 frame
10:17:06.654 scombdb-up Underflow, buf_cnt=0, will generate 1 frame
Playing Front_Center.wav at sampling rate 16000 (original file sampling rate=48000)
Press <ENTER> to stop playing and quit
10:17:06.678 scombdb-up Underflow, buf_cnt=0, will generate 1 frame
10:17:06.678 scombdb-up Underflow, buf_cnt=0, will generate 1 frame
10:17:06.720 scombdb-up Underflow, buf_cnt=0, will generate 1 frame
10:17:06.747 scombdb-up Underflow, buf_cnt=0, will generate 1 frame
10:17:06.773 scombdb-dn 320 samples reduced, buf_cnt=2240
10:17:06.773 scombdb-up Underflow, buf_cnt=0, will generate 1 frame
10:17:07.153 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.234 scombdb-up 481 samples reduced, buf_cnt=2079
10:17:07.234 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.315 scombdb-up 401 samples reduced, buf_cnt=1998
10:17:07.315 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.383 scombdb-up 98 samples reduced, buf_cnt=2220
10:17:07.383 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.464 scombdb-up 529 samples reduced, buf_cnt=2011
10:17:07.464 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.545 scombdb-up 91 samples reduced, buf_cnt=2240
10:17:07.545 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.612 scombdb-up 379 samples reduced, buf_cnt=2181
10:17:07.613 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.694 scombdb-up 492 samples reduced, buf_cnt=2009
10:17:07.694 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.775 scombdb-up 98 samples reduced, buf_cnt=2231
10:17:07.775 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.842 scombdb-up 385 samples reduced, buf_cnt=2166
10:17:07.842 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:07.923 scombdb-up 356 samples reduced, buf_cnt=2130
10:17:07.923 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:08.004 scombdb-up 316 samples reduced, buf_cnt=2134
10:17:08.004 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:08.072 scombdb-up 220 samples reduced, buf_cnt=2234
10:17:08.072 scombdb-dn Underflow, buf_cnt=0, will generate 1 frame
10:17:08.153 scombdb-up 351 samples reduced, buf_cnt=2203
10:17:08.153 scomb-rev Pausing media flow on downstream direction (level=-14)
10:17:08.175 scomb-rev Pausing media flow on upstream direction (level=14)
10:17:09.206 wav_player.c File port Front_Center.wav EOF
10:17:09.206 wav_player.c
------cut---------
What's the problem?
Please, help
