static int waveout_open(sample_format_t sf)
{
WAVEFORMATEX format;
int rc, i;
/* WAVEFORMATEX does not support channels > 2, waveOutWrite() wants little endian signed PCM */
if (sf_get_bigendian(sf) || !sf_get_signed(sf) || sf_get_channels(sf) > 2) {
return -OP_ERROR_SAMPLE_FORMAT;
}
memset(&format, 0, sizeof(format));
format.cbSize = sizeof(format);
format.wFormatTag = WAVE_FORMAT_PCM;
format.nChannels = sf_get_channels(sf);
format.nSamplesPerSec = sf_get_rate(sf);
format.wBitsPerSample = sf_get_bits(sf);
format.nAvgBytesPerSec = sf_get_second_size(sf);
format.nBlockAlign = sf_get_frame_size(sf);
if ((rc = waveOutOpen(&wave_out, WAVE_MAPPER, &format, 0, 0, CALLBACK_NULL)) != MMSYSERR_NOERROR) {
switch (rc) {
case MMSYSERR_ALLOCATED:
errno = EBUSY;
return -OP_ERROR_ERRNO;
case MMSYSERR_BADDEVICEID:
case MMSYSERR_NODRIVER:
errno = ENODEV;
return -OP_ERROR_ERRNO;
case MMSYSERR_NOMEM:
errno = ENOMEM;
return -OP_ERROR_ERRNO;
case WAVERR_BADFORMAT:
return -OP_ERROR_SAMPLE_FORMAT;
}
return -OP_ERROR_INTERNAL;
}
/* reset buffers */
for (i = 0; i < buffer_count; i++) {
buffers[i].dwFlags = 0;
}
buffer_idx = 0;
buffers_free = buffer_count;
waveout_sf = sf;
return 0;
}
static inline unsigned int buffer_second_size(void)
{
return sf_get_second_size(buffer_sf);
}
static int oss_set_sf(sample_format_t sf)
{
int tmp, log2_fragment_size, nr_fragments, bytes_per_second;
oss_reset();
oss_sf = sf;
#ifdef SNDCTL_DSP_CHANNELS
tmp = sf_get_channels(oss_sf);
if (ioctl(oss_fd, SNDCTL_DSP_CHANNELS, &tmp) == -1)
return -1;
#else
tmp = sf_get_channels(oss_sf) - 1;
if (ioctl(oss_fd, SNDCTL_DSP_STEREO, &tmp) == -1)
return -1;
#endif
if (sf_get_bits(oss_sf) == 16) {
if (sf_get_signed(oss_sf)) {
if (sf_get_bigendian(oss_sf)) {
tmp = AFMT_S16_BE;
} else {
tmp = AFMT_S16_LE;
}
} else {
if (sf_get_bigendian(oss_sf)) {
tmp = AFMT_U16_BE;
} else {
tmp = AFMT_U16_LE;
}
}
} else if (sf_get_bits(oss_sf) == 8) {
if (sf_get_signed(oss_sf)) {
tmp = AFMT_S8;
} else {
tmp = AFMT_U8;
}
} else if (sf_get_bits(oss_sf) == 32 && sf_get_signed(oss_sf)) {
if (sf_get_bigendian(oss_sf)) {
tmp = AFMT_S32_BE;
} else {
tmp = AFMT_S32_LE;
}
} else if (sf_get_bits(oss_sf) == 24 && sf_get_signed(oss_sf) && !sf_get_bigendian(oss_sf)) {
tmp = AFMT_S24_PACKED;
} else {
d_print("unsupported sample format: %c%u_%s\n",
sf_get_signed(oss_sf) ? 'S' : 'U', sf_get_bits(oss_sf),
sf_get_bigendian(oss_sf) ? "BE" : "LE");
return -1;
}
if (ioctl(oss_fd, SNDCTL_DSP_SAMPLESIZE, &tmp) == -1)
return -1;
tmp = sf_get_rate(oss_sf);
if (ioctl(oss_fd, SNDCTL_DSP_SPEED, &tmp) == -1)
return -1;
bytes_per_second = sf_get_second_size(oss_sf);
log2_fragment_size = 0;
while (1 << log2_fragment_size < bytes_per_second / 25)
log2_fragment_size++;
log2_fragment_size--;
nr_fragments = 32;
/* bits 0..15 = size of fragment, 16..31 = log2(number of fragments) */
tmp = (nr_fragments << 16) + log2_fragment_size;
if (ioctl(oss_fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1)
return -1;
return 0;
}
