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audio(3) playback test program
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Authored By
christos
Jul 11 2024, 5:31 PM
Size
3 KB
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audio(3) playback test program
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#include <audio.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void
print_audio_info(struct audio_device *d)
{
struct audio_channel *c;
printf("name=%s\n", d->name);
printf("desc=%s\n", d->desc);
printf("unit=%d\n", d->unit);
printf("devnode=%s\n", d->devnode);
printf("is_default=%d\n", d->is_default);
printf("format=%#08x\n", d->format);
printf("rate=%d\n", d->rate);
printf("channels=%d\n", d->channels);
if (d->mixer != NULL)
printf("mixer=%s\n", d->mixer->name);
printf("caps=%#08x\n", d->caps);
if (d->caps & PCM_CAP_TRIGGER)
printf("\tPCM_CAP_TRIGGER (Trigger start)\n");
if (d->caps & PCM_CAP_MMAP)
printf("\tPCM_CAP_MMAP (Memory mapping)\n");
if (d->caps & PCM_CAP_MULTI)
printf("\tPCM_CAP_MULTI (Multiple open)\n");
if (d->caps & PCM_CAP_INPUT)
printf("\tPCM_CAP_INPUT (Recording)\n");
if (d->caps & PCM_CAP_OUTPUT)
printf("\tPCM_CAP_OUTPUT (Playback)\n");
if (d->caps & PCM_CAP_DUPLEX)
printf("\tPCM_CAP_DUPLEX (Duplex)\n");
if (d->caps & PCM_CAP_VIRTUAL)
printf("\tPCM_CAP_VIRTUAL (Virtual device)\n");
if (d->caps & PCM_CAP_ANALOGIN)
printf("\tPCM_CAP_ANALOGIN (Analog input)\n");
if (d->caps & PCM_CAP_ANALOGOUT)
printf("\tPCM_CAP_ANALOGOUT (Analog output)\n");
if (d->caps & PCM_CAP_DIGITALIN)
printf("\tPCM_CAP_DIGITALIN (Digital input)\n");
if (d->caps & PCM_CAP_DIGITALOUT)
printf("\tPCM_CAP_DIGITALOUT (Digital output)\n");
if (d->caps & PCM_CAP_REALTIME)
printf("\tPCM_CAP_REALTIME (High precision latency control)\n");
printf("open_mode=%#04x\n", d->open_mode);
if (d->open_mode & AUDIO_REC)
printf("\tAUDIO_REC (Recording)\n");
if (d->open_mode & AUDIO_PLAY)
printf("\tAUDIO_PLAY (Playback)\n");
if (d->open_mode & AUDIO_EXCL)
printf("\tAUDIO_EXCL (Exclusive access)\n");
if (d->open_mode & AUDIO_NBIO)
printf("\tAUDIO_NBIO (Non-blocking IO)\n");
if (d->open_mode & AUDIO_MMAP)
printf("\tAUDIO_MMAP (Memory mapped IO)\n");
if (d->chan_rec) {
c = d->chan_rec;
printf("chan_rec=%s\n", c->name);
printf("\tunit=%d\n", c->unit);
printf("\trate=%d\n", c->rate);
printf("\tformat=%#08x\n", c->format);
printf("\tmin_rate=%d\n", c->min_rate);
printf("\tmax_rate=%d\n", c->max_rate);
printf("\tcaps=%#08x\n", c->caps);
printf("\tbufsz=%ld\n", c->bufsz);
printf("\tsample_size=%ld\n", c->sample_size);
printf("\tframe_size=%ld\n", c->frame_size);
printf("\tframe_total=%d\n", c->frame_total);
}
if (d->chan_play) {
c = d->chan_play;
printf("chan_play=%s\n", c->name);
printf("\tunit=%d\n", c->unit);
printf("\trate=%d\n", c->rate);
printf("\tformat=%#08x\n", c->format);
printf("\tmin_rate=%d\n", c->min_rate);
printf("\tmax_rate=%d\n", c->max_rate);
printf("\tcaps=%#08x\n", c->caps);
printf("\tbufsz=%ld\n", c->bufsz);
printf("\tsample_size=%ld\n", c->sample_size);
printf("\tframe_size=%ld\n", c->frame_size);
printf("\tframe_total=%d\n", c->frame_total);
}
}
int
main(int argc, char *argv[])
{
struct audio_device *d;
d = audio_open(argv[1], AUDIO_PLAY, AFMT_S32_NE, 2, 48000);
if (d == NULL)
err(1, "audio_open");
print_audio_info(d);
for (;;) {
char buf[d->chan_play->bufsz];
ssize_t n;
n = read(STDIN_FILENO, buf, sizeof(buf));
if (n < 0)
err(1, "read");
n = audio_write(d, buf, sizeof(buf));
}
audio_close(d);
return (0);
}

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audio(3) playback test program (3 KB)

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