/**
* Mix (at most) the given number of bytes into the given position of the
* device buffer, from the secondary buffer "dsb" (starting at the current
* mix position for that buffer).
*
* Returns the number of bytes actually mixed into the device buffer. This
* will match fraglen unless the end of the secondary buffer is reached
* (and it is not looping).
*
* dsb = the secondary buffer to mix from
* writepos = position (offset) in device buffer to write at
* fraglen = number of bytes to mix
*/
static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
{
INT len = fraglen;
BYTE *ibuf, *volbuf;
DWORD oldpos, mixbufpos;
TRACE("sec_mixpos=%d/%d\n", dsb->sec_mixpos, dsb->buflen);
TRACE("(%p,%d,%d)\n",dsb,writepos,fraglen);
if (len % dsb->device->pwfx->nBlockAlign) {
INT nBlockAlign = dsb->device->pwfx->nBlockAlign;
ERR("length not a multiple of block size, len = %d, block size = %d\n", len, nBlockAlign);
len -= len % nBlockAlign; /* data alignment */
}
/* Resample buffer to temporary buffer specifically allocated for this purpose, if needed */
oldpos = dsb->sec_mixpos;
DSOUND_MixToTemporary(dsb, len);
ibuf = dsb->device->tmp_buffer;
/* Apply volume if needed */
volbuf = DSOUND_MixerVol(dsb, len);
if (volbuf)
ibuf = volbuf;
mixbufpos = DSOUND_bufpos_to_mixpos(dsb->device, writepos);
/* Now mix the temporary buffer into the devices main buffer */
if ((writepos + len) <= dsb->device->buflen)
dsb->device->mixfunction(ibuf, dsb->device->mix_buffer + mixbufpos, len);
else
{
DWORD todo = dsb->device->buflen - writepos;
dsb->device->mixfunction(ibuf, dsb->device->mix_buffer + mixbufpos, todo);
dsb->device->mixfunction(ibuf + todo, dsb->device->mix_buffer, len - todo);
}
/* check for notification positions */
if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
dsb->state != STATE_STARTING) {
INT ilen = DSOUND_BufPtrDiff(dsb->buflen, dsb->sec_mixpos, oldpos);
DSOUND_CheckEvent(dsb, oldpos, ilen);
}
/* increase mix position */
dsb->primary_mixpos += len;
dsb->primary_mixpos %= dsb->device->buflen;
return len;
}
/**
* Mix (at most) the given number of bytes into the given position of the
* device buffer, from the secondary buffer "dsb" (starting at the current
* mix position for that buffer).
*
* Returns the number of bytes actually mixed into the device buffer. This
* will match fraglen unless the end of the secondary buffer is reached
* (and it is not looping).
*
* dsb = the secondary buffer to mix from
* writepos = position (offset) in device buffer to write at
* fraglen = number of bytes to mix
*/
static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
{
INT len = fraglen;
float *ibuf;
DWORD oldpos;
UINT frames = fraglen / dsb->device->pwfx->nBlockAlign;
TRACE("sec_mixpos=%d/%d\n", dsb->sec_mixpos, dsb->buflen);
TRACE("(%p,%d,%d)\n",dsb,writepos,fraglen);
if (len % dsb->device->pwfx->nBlockAlign) {
INT nBlockAlign = dsb->device->pwfx->nBlockAlign;
ERR("length not a multiple of block size, len = %d, block size = %d\n", len, nBlockAlign);
len -= len % nBlockAlign; /* data alignment */
}
/* Resample buffer to temporary buffer specifically allocated for this purpose, if needed */
oldpos = dsb->sec_mixpos;
DSOUND_MixToTemporary(dsb, frames);
ibuf = dsb->device->tmp_buffer;
/* Apply volume if needed */
DSOUND_MixerVol(dsb, frames);
mixieee32(ibuf, dsb->device->mix_buffer, frames * dsb->device->pwfx->nChannels);
/* check for notification positions */
if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
dsb->state != STATE_STARTING) {
INT ilen = DSOUND_BufPtrDiff(dsb->buflen, dsb->sec_mixpos, oldpos);
DSOUND_CheckEvent(dsb, oldpos, ilen);
}
return len;
}
/**
* Mix (at most) the given number of bytes into the given position of the
* device buffer, from the secondary buffer "dsb" (starting at the current
* mix position for that buffer).
*
* Returns the number of bytes actually mixed into the device buffer. This
* will match fraglen unless the end of the secondary buffer is reached
* (and it is not looping).
*
* dsb = the secondary buffer to mix from
* writepos = position (offset) in device buffer to write at
* fraglen = number of bytes to mix
*/
static DWORD DSOUND_MixInBuffer(IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD fraglen)
{
INT len = fraglen, ilen;
BYTE *ibuf = (dsb->tmp_buffer ? dsb->tmp_buffer : dsb->buffer->memory) + dsb->buf_mixpos, *volbuf;
DWORD oldpos, mixbufpos;
TRACE("buf_mixpos=%d/%d sec_mixpos=%d/%d\n", dsb->buf_mixpos, dsb->tmp_buffer_len, dsb->sec_mixpos, dsb->buflen);
TRACE("(%p,%d,%d)\n",dsb,writepos,fraglen);
assert(dsb->buf_mixpos + len <= dsb->tmp_buffer_len);
if (len % dsb->device->pwfx->nBlockAlign) {
INT nBlockAlign = dsb->device->pwfx->nBlockAlign;
ERR("length not a multiple of block size, len = %d, block size = %d\n", len, nBlockAlign);
len -= len % nBlockAlign; /* data alignment */
}
/* Resample buffer to temporary buffer specifically allocated for this purpose, if needed */
DSOUND_MixToTemporary(dsb, dsb->sec_mixpos, DSOUND_bufpos_to_secpos(dsb, dsb->buf_mixpos+len) - dsb->sec_mixpos, TRUE);
if (dsb->resampleinmixer)
ibuf = dsb->device->tmp_buffer;
/* Apply volume if needed */
volbuf = DSOUND_MixerVol(dsb, len);
if (volbuf)
ibuf = volbuf;
mixbufpos = DSOUND_bufpos_to_mixpos(dsb->device, writepos);
/* Now mix the temporary buffer into the devices main buffer */
if ((writepos + len) <= dsb->device->buflen)
dsb->device->mixfunction(ibuf, dsb->device->mix_buffer + mixbufpos, len);
else
{
DWORD todo = dsb->device->buflen - writepos;
dsb->device->mixfunction(ibuf, dsb->device->mix_buffer + mixbufpos, todo);
dsb->device->mixfunction(ibuf + todo, dsb->device->mix_buffer, len - todo);
}
oldpos = dsb->sec_mixpos;
dsb->buf_mixpos += len;
if (dsb->buf_mixpos >= dsb->tmp_buffer_len) {
if (dsb->buf_mixpos > dsb->tmp_buffer_len)
ERR("Mixpos (%u) past buflen (%u), capping...\n", dsb->buf_mixpos, dsb->tmp_buffer_len);
if (dsb->playflags & DSBPLAY_LOOPING) {
dsb->buf_mixpos -= dsb->tmp_buffer_len;
} else if (dsb->buf_mixpos >= dsb->tmp_buffer_len) {
dsb->buf_mixpos = dsb->sec_mixpos = 0;
dsb->state = STATE_STOPPED;
}
DSOUND_RecalcFreqAcc(dsb);
}
dsb->sec_mixpos = DSOUND_bufpos_to_secpos(dsb, dsb->buf_mixpos);
ilen = DSOUND_BufPtrDiff(dsb->buflen, dsb->sec_mixpos, oldpos);
/* check for notification positions */
if (dsb->dsbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY &&
dsb->state != STATE_STARTING) {
DSOUND_CheckEvent(dsb, oldpos, ilen);
}
/* increase mix position */
dsb->primary_mixpos += len;
if (dsb->primary_mixpos >= dsb->device->buflen)
dsb->primary_mixpos -= dsb->device->buflen;
return len;
}
