mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2026-06-13 17:38:20 +02:00
d4e0d51c15
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@63 fefdeb5f-60dc-0310-8127-8f9354f1896f
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
#include <assert.h>
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#include <sys/soundcard.h>
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#include <sys/ioctl.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "oss-util.h"
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int pa_oss_open(const char *device, int *mode, int* pcaps) {
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int fd = -1;
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assert(device && mode && (*mode == O_RDWR || *mode == O_RDONLY || *mode == O_WRONLY));
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if (*mode == O_RDWR) {
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if ((fd = open(device, O_RDWR|O_NDELAY)) >= 0) {
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int dcaps, *tcaps;
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ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0);
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tcaps = pcaps ? pcaps : &dcaps;
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if (ioctl(fd, SNDCTL_DSP_GETCAPS, tcaps) < 0) {
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fprintf(stderr, __FILE__": SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
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goto fail;
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}
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if (*tcaps & DSP_CAP_DUPLEX)
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return fd;
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close(fd);
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}
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if ((fd = open(device, (*mode = O_WRONLY)|O_NDELAY)) < 0) {
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if ((fd = open(device, (*mode = O_RDONLY)|O_NDELAY)) < 0) {
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fprintf(stderr, __FILE__": open('%s'): %s\n", device, strerror(errno));
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goto fail;
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}
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}
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} else {
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if ((fd = open(device, *mode|O_NDELAY)) < 0) {
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fprintf(stderr, __FILE__": open('%s'): %s\n", device, strerror(errno));
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goto fail;
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}
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}
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if (pcaps) {
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if (ioctl(fd, SNDCTL_DSP_GETCAPS, pcaps) < 0) {
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fprintf(stderr, "SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
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goto fail;
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}
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}
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return fd;
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fail:
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if (fd >= 0)
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close(fd);
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return fd;
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}
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int pa_oss_auto_format(int fd, struct pa_sample_spec *ss) {
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int format, channels, speed;
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assert(fd >= 0 && ss);
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format = AFMT_S16_NE;
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if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_S16_NE) {
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int f = AFMT_S16_NE == AFMT_S16_LE ? AFMT_S16_BE : AFMT_S16_LE;
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format = f;
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if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != f) {
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format = AFMT_U8;
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if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_U8) {
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fprintf(stderr, "SNDCTL_DSP_SETFMT: %s\n", format != AFMT_U8 ? "No supported sample format" : strerror(errno));
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return -1;
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} else
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ss->format = PA_SAMPLE_U8;
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} else
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ss->format = f == AFMT_S16_LE ? PA_SAMPLE_S16LE : PA_SAMPLE_S16BE;
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} else
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ss->format = PA_SAMPLE_S16NE;
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channels = 2;
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if (ioctl(fd, SNDCTL_DSP_CHANNELS, &channels) < 0) {
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fprintf(stderr, "SNDCTL_DSP_CHANNELS: %s\n", strerror(errno));
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return -1;
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}
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assert(channels);
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ss->channels = channels;
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speed = 44100;
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if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
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fprintf(stderr, "SNDCTL_DSP_SPEED: %s\n", strerror(errno));
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return -1;
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}
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assert(speed);
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ss->rate = speed;
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return 0;
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}
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