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audio: mode selection

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Matheus
2026-08-07 08:27:17 -03:00
parent c75b45436a
commit c194569d65
3 changed files with 403 additions and 26 deletions
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kernel-src/io/audio/audio.c
+51 -7
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@@ -7,9 +7,26 @@
static size_t bytes_to_frames(int fmt, int channels, size_t bytes) {
size_t sample_size = 0;
switch (fmt) {
case AUDIO_FORMAT_S8:
case AUDIO_FORMAT_U8:
sample_size = 1;
break;
case AUDIO_FORMAT_S16_BE:
case AUDIO_FORMAT_S16_LE:
case AUDIO_FORMAT_U16_BE:
case AUDIO_FORMAT_U16_LE:
sample_size = 2;
break;
case AUDIO_FORMAT_S24_PACKED:
case AUDIO_FORMAT_S24_BE:
case AUDIO_FORMAT_S24_LE:
sample_size = 3;
break;
case AUDIO_FORMAT_S32_BE:
case AUDIO_FORMAT_S32_LE:
case AUDIO_FORMAT_FLOAT:
sample_size = 4;
break;
}
return bytes / (sample_size * channels);
@@ -238,26 +255,53 @@ static int audio_ioctl(int minor, unsigned long request, void *arg, int *result,
}
case SNDCTL_DSP_SPEED: {
int speed;
stream->ops->get_info(stream, AUDIO_STREAM_INFO_SPEED, &speed);
error = USERCOPY_POSSIBLY_FROM_USER(&speed, arg, sizeof(speed));
if (error)
break;
error = USERCOPY_POSSIBLY_TO_USER(arg, &speed, sizeof(speed));
int selected;
error = stream->ops->set_speed(stream, speed, &selected);
if (error)
break;
error = USERCOPY_POSSIBLY_TO_USER(arg, &selected, sizeof(selected));
break;
}
case SNDCTL_DSP_CHANNELS: {
int channels;
stream->ops->get_info(stream, AUDIO_STREAM_INFO_CHANNELS, &channels);
error = USERCOPY_POSSIBLY_FROM_USER(&channels, arg, sizeof(channels));
if (error)
break;
error = USERCOPY_POSSIBLY_TO_USER(arg, &channels, sizeof(channels));
int selected;
error = stream->ops->set_channels(stream, channels, &selected);
if (error)
break;
error = USERCOPY_POSSIBLY_TO_USER(arg, &selected, sizeof(selected));
break;
}
case SNDCTL_DSP_GETFMTS:
case SNDCTL_DSP_SETFMT: {
case SNDCTL_DSP_GETFMTS: {
int fmt;
stream->ops->get_info(stream, AUDIO_STREAM_INFO_FORMAT, &fmt);
stream->ops->get_info(stream, AUDIO_STREAM_INFO_SUPPORTED_FORMATS, &fmt);
error = USERCOPY_POSSIBLY_TO_USER(arg, &fmt, sizeof(fmt));
break;
}
case SNDCTL_DSP_SETFMT: {
int fmt;
error = USERCOPY_POSSIBLY_FROM_USER(&fmt, arg, sizeof(fmt));
if (error)
break;
int selected;
error = stream->ops->set_format(stream, fmt, &selected);
if (error)
break;
error = USERCOPY_POSSIBLY_TO_USER(arg, &selected, sizeof(selected));
break;
}
case SNDCTL_DSP_SETFRAGMENT: {
int f = ((AUDIO_RINGBUFFER_SIZE / fragment_size) << 16) | log2(fragment_size);
error = USERCOPY_POSSIBLY_TO_USER(arg, &f, sizeof(f));