void ossPrimitiveFileOp::Close()
{
if (isValid() && (!_bIsStdout)) {
oss_close(_fileHandle);
_fileHandle = OSS_INVALID_HANDLE_FD_VALUE;
}
}
static void
oss_close_in(void)
{
oss_close();
if (dsp_mode == O_RDWR)
{
if (oss_open(O_WRONLY))
oss_restore_format();
}
}
static void
oss_close_out(void)
{
oss_close();
if (dsp_mode == O_RDWR)
{
if (oss_open(O_RDONLY))
oss_restore_format();
}
/* Ack all remaining packets */
while (!rdpsnd_queue_empty())
rdpsnd_queue_next(0);
}
static int oss_open(sample_format_t sf, const channel_position_t *channel_map)
{
int oss_version = 0;
oss_fd = open(oss_dsp_device, O_WRONLY);
if (oss_fd == -1)
return -1;
ioctl(oss_fd, OSS_GETVERSION, &oss_version);
d_print("oss version: %#08x\n", oss_version);
if (oss_set_sf(sf) == -1) {
oss_close();
return -1;
}
return 0;
}
/* "Public" function, called from a libspotify callback */
G_MODULE_EXPORT int audio_delivery(const sp_audioformat* format, const void* frames, int num_frames) {
int ret;
g_mutex_lock(&g_oss_mutex);
/* What are we supposed to do here? */
if (num_frames == 0) {
/* Pause: close the device */
if (g_oss_fd != -1)
oss_close();
ret = 0;
}
else {
if (g_oss_fd == -1) {
/* Some frames to play, but the device is closed: open it and set it up */
oss_open();
oss_setup(format);
}
/* Is the device ready to be written to? */
ret = poll(&g_pfd, 1, 0);
if (ret == -1)
g_error("Can't poll OSS device: %s", g_strerror(errno));
else if (ret != 0) {
/* Ok, we can write to the device without blocking */
ret = write(g_oss_fd, frames, g_oss_frame_size * num_frames);
if (ret == -1)
g_error("Can't write to OSS device: %s", g_strerror(errno));
ret /= g_oss_frame_size;
}
}
g_mutex_unlock(&g_oss_mutex);
return ret;
}
static RD_BOOL
oss_set_format(RD_WAVEFORMATEX * pwfx)
{
int fragments;
static RD_BOOL driver_broken = False;
assert(dsp_fd != -1);
if (dsp_configured)
{
if ((pwfx->wBitsPerSample == 8) && (format != AFMT_U8))
return False;
if ((pwfx->wBitsPerSample == 16) && (format != AFMT_S16_LE))
return False;
if ((pwfx->nChannels == 2) != ! !stereo)
return False;
if (pwfx->nSamplesPerSec != snd_rate)
return False;
return True;
}
ioctl(dsp_fd, SNDCTL_DSP_RESET, NULL);
ioctl(dsp_fd, SNDCTL_DSP_SYNC, NULL);
if (pwfx->wBitsPerSample == 8)
format = AFMT_U8;
else if (pwfx->wBitsPerSample == 16)
format = AFMT_S16_LE;
samplewidth = pwfx->wBitsPerSample / 8;
if (ioctl(dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
{
perror("SNDCTL_DSP_SETFMT");
oss_close();
return False;
}
if (pwfx->nChannels == 2)
{
stereo = 1;
samplewidth *= 2;
}
else
{
stereo = 0;
}
if (ioctl(dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
{
perror("SNDCTL_DSP_CHANNELS");
oss_close();
return False;
}
oss_driver.need_resampling = 0;
snd_rate = pwfx->nSamplesPerSec;
if (ioctl(dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1)
{
uint32 rates[] = { 44100, 48000, 0 };
uint32 *prates = rates;
while (*prates != 0)
{
if ((pwfx->nSamplesPerSec != *prates)
&& (ioctl(dsp_fd, SNDCTL_DSP_SPEED, prates) != -1))
{
oss_driver.need_resampling = 1;
snd_rate = *prates;
if (rdpsnd_dsp_resample_set
(snd_rate, pwfx->wBitsPerSample, pwfx->nChannels) == False)
{
error("rdpsnd_dsp_resample_set failed");
oss_close();
return False;
}
break;
}
prates++;
}
if (*prates == 0)
{
perror("SNDCTL_DSP_SPEED");
oss_close();
return False;
}
}
/* try to get 12 fragments of 2^12 bytes size */
fragments = (12 << 16) + 12;
ioctl(dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);
if (!driver_broken)
{
audio_buf_info info;
memset(&info, 0, sizeof(info));
if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
{
perror("SNDCTL_DSP_GETOSPACE");
oss_close();
return False;
}
if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0)
{
fprintf(stderr,
"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
info.fragments, info.fragstotal, info.fragsize);
driver_broken = True;
}
}
dsp_configured = True;
return True;
}
