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make oss sample spec configurable

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@77 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-07-16 17:51:53 +00:00
parent 74bbf31c37
commit 554b01b6b3
6 changed files with 108 additions and 37 deletions
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70
src/oss-util.c
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@ -62,27 +62,39 @@ fail:
}
int pa_oss_auto_format(int fd, struct pa_sample_spec *ss) {
int format, channels, speed;
int format, channels, speed, reqformat;
static const int format_trans[] = {
[PA_SAMPLE_U8] = AFMT_U8,
[PA_SAMPLE_ALAW] = AFMT_A_LAW,
[PA_SAMPLE_ULAW] = AFMT_MU_LAW,
[PA_SAMPLE_S16LE] = AFMT_S16_LE,
[PA_SAMPLE_S16BE] = AFMT_S16_BE,
[PA_SAMPLE_FLOAT32LE] = AFMT_QUERY, /* not supported */
[PA_SAMPLE_FLOAT32BE] = AFMT_QUERY, /* not supported */
};
assert(fd >= 0 && ss);
format = AFMT_S16_NE;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_S16_NE) {
int f = AFMT_S16_NE == AFMT_S16_LE ? AFMT_S16_BE : AFMT_S16_LE;
format = f;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != f) {
format = AFMT_U8;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_U8) {
fprintf(stderr, "SNDCTL_DSP_SETFMT: %s\n", format != AFMT_U8 ? "No supported sample format" : strerror(errno));
return -1;
reqformat = format = format_trans[ss->format];
if (reqformat == AFMT_QUERY || ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != reqformat) {
format = AFMT_S16_NE;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_S16_NE) {
int f = AFMT_S16_NE == AFMT_S16_LE ? AFMT_S16_BE : AFMT_S16_LE;
format = f;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != f) {
format = AFMT_U8;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_U8) {
fprintf(stderr, "SNDCTL_DSP_SETFMT: %s\n", format != AFMT_U8 ? "No supported sample format" : strerror(errno));
return -1;
} else
ss->format = PA_SAMPLE_U8;
} else
ss->format = PA_SAMPLE_U8;
ss->format = f == AFMT_S16_LE ? PA_SAMPLE_S16LE : PA_SAMPLE_S16BE;
} else
ss->format = f == AFMT_S16_LE ? PA_SAMPLE_S16LE : PA_SAMPLE_S16BE;
} else
ss->format = PA_SAMPLE_S16NE;
ss->format = PA_SAMPLE_S16NE;
}
channels = 2;
channels = ss->channels;
if (ioctl(fd, SNDCTL_DSP_CHANNELS, &channels) < 0) {
fprintf(stderr, "SNDCTL_DSP_CHANNELS: %s\n", strerror(errno));
return -1;
@ -90,7 +102,7 @@ int pa_oss_auto_format(int fd, struct pa_sample_spec *ss) {
assert(channels);
ss->channels = channels;
speed = 44100;
speed = ss->rate;
if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
fprintf(stderr, "SNDCTL_DSP_SPEED: %s\n", strerror(errno));
return -1;
@ -100,3 +112,27 @@ int pa_oss_auto_format(int fd, struct pa_sample_spec *ss) {
return 0;
}
static int log2(int v) {
int k = 0;
for (;;) {
v >>= 1;
if (!v) break;
k++;
}
return k;
}
int pa_oss_set_fragments(int fd, int nfrags, int frag_size) {
int arg;
arg = ((int) nfrags << 16) | log2(frag_size);
if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &arg) < 0) {
fprintf(stderr, "SNDCTL_DSP_SETFRAGMENT: %s\n", strerror(errno));
return -1;
}
return 0;
}