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event: add PULL_INPUT event

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Rename some events, add an explicit event to pull input
This commit is contained in:
Wim Taymans 2016-06-06 22:29:07 +02:00
parent e56f120559
commit 6377b9bd12
4 changed files with 21 additions and 109 deletions
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90
pinos/tests/alsa-utils.c
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@ -9,74 +9,6 @@
static int verbose = 0; /* verbose flag */
#if 0
static void
generate_sine(const snd_pcm_channel_area_t *areas,
snd_pcm_uframes_t offset,
int count, double *_phase)
{
static double max_phase = 2. * M_PI;
double phase = *_phase;
double step = max_phase*freq/(double)rate;
unsigned char *samples[channels];
int steps[channels];
unsigned int chn;
int format_bits = snd_pcm_format_width(format);
unsigned int maxval = (1 << (format_bits - 1)) - 1;
int bps = format_bits / 8; /* bytes per sample */
int phys_bps = snd_pcm_format_physical_width(format) / 8;
int big_endian = snd_pcm_format_big_endian(format) == 1;
int to_unsigned = snd_pcm_format_unsigned(format) == 1;
int is_float = (format == SND_PCM_FORMAT_FLOAT_LE ||
format == SND_PCM_FORMAT_FLOAT_BE);
/* verify and prepare the contents of areas */
for (chn = 0; chn < channels; chn++) {
if ((areas[chn].first % 8) != 0) {
printf("areas[%i].first == %i, aborting...\n", chn, areas[chn].first);
exit(EXIT_FAILURE);
}
samples[chn] = /*(signed short *)*/(((unsigned char *)areas[chn].addr) + (areas[chn].first / 8));
if ((areas[chn].step % 16) != 0) {
printf("areas[%i].step == %i, aborting...\n", chn, areas[chn].step);
exit(EXIT_FAILURE);
}
steps[chn] = areas[chn].step / 8;
samples[chn] += offset * steps[chn];
}
/* fill the channel areas */
while (count-- > 0) {
union {
float f;
int i;
} fval;
int res, i;
if (is_float) {
fval.f = sin(phase) * maxval;
res = fval.i;
} else
res = sin(phase) * maxval;
if (to_unsigned)
res ^= 1U << (format_bits - 1);
for (chn = 0; chn < channels; chn++) {
/* Generate data in native endian format */
if (big_endian) {
for (i = 0; i < bps; i++)
*(samples[chn] + phys_bps - 1 - i) = (res >> i * 8) & 0xff;
} else {
for (i = 0; i < bps; i++)
*(samples[chn] + i) = (res >> i * 8) & 0xff;
}
samples[chn] += steps[chn];
}
phase += step;
if (phase >= max_phase)
phase -= max_phase;
}
*_phase = phase;
}
#endif
#define CHECK(s,msg) if ((err = (s)) < 0) { printf (msg ": %s\n", snd_strerror(err)); return err; }
static snd_pcm_format_t
@ -236,26 +168,6 @@ xrun_recovery (snd_pcm_t *handle, int err)
return err;
}
#if 0
/*
* Transfer method - write and wait for room in buffer using poll
*/
static int
wait_for_poll (snd_pcm_t *handle, struct pollfd *ufds, unsigned int count)
{
unsigned short revents;
while (1) {
poll(ufds, count, -1);
snd_pcm_poll_descriptors_revents(handle, ufds, count, &revents);
if (revents & POLLERR)
return -EIO;
if (revents & POLLOUT)
return 0;
}
}
#endif
/*
* Transfer method - direct write only
*/
@ -335,7 +247,7 @@ direct_loop (void *user_data)
event.refcount = 1;
event.notify = NULL;
event.type = SPI_EVENT_TYPE_NEED_INPUT;
event.type = SPI_EVENT_TYPE_PULL_INPUT;
event.port_id = 0;
event.data = buffer;