/**
* Move freqAccNext to freqAcc, and find new values for buffer length and freqAccNext
*/
static void DSOUND_RecalcFreqAcc(IDirectSoundBufferImpl *dsb)
{
if (!dsb->freqneeded) return;
dsb->freqAcc = dsb->freqAccNext;
dsb->tmp_buffer_len = DSOUND_secpos_to_bufpos(dsb, dsb->buflen, 0, &dsb->freqAccNext);
TRACE("New freqadjust: %04x, new buflen: %d\n", dsb->freqAccNext, dsb->tmp_buffer_len);
}
/**
* Recalculate the size for temporary buffer, and new writelead
* Should be called when one of the following things occur:
* - Primary buffer format is changed
* - This buffer format (frequency) is changed
*
* After this, DSOUND_MixToTemporary(dsb, 0, dsb->buflen) should
* be called to refill the temporary buffer with data.
*/
void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
{
BOOL needremix = TRUE, needresample = (dsb->freq != dsb->device->pwfx->nSamplesPerSec);
DWORD bAlign = dsb->pwfx->nBlockAlign, pAlign = dsb->device->pwfx->nBlockAlign;
WAVEFORMATEXTENSIBLE *pwfxe;
BOOL ieee = FALSE;
TRACE("(%p)\n",dsb);
pwfxe = (WAVEFORMATEXTENSIBLE *) dsb->pwfx;
if ((pwfxe->Format.wFormatTag == WAVE_FORMAT_IEEE_FLOAT) || ((pwfxe->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE)
&& (IsEqualGUID(&pwfxe->SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))))
ieee = TRUE;
/* calculate the 10ms write lead */
dsb->writelead = (dsb->freq / 100) * dsb->pwfx->nBlockAlign;
if ((dsb->pwfx->wBitsPerSample == dsb->device->pwfx->wBitsPerSample) &&
(dsb->pwfx->nChannels == dsb->device->pwfx->nChannels) && !needresample && !ieee)
needremix = FALSE;
HeapFree(GetProcessHeap(), 0, dsb->tmp_buffer);
dsb->tmp_buffer = NULL;
dsb->max_buffer_len = dsb->freqAcc = dsb->freqAccNext = 0;
dsb->freqneeded = needresample;
if (ieee)
dsb->convert = convertbpp[4][dsb->device->pwfx->wBitsPerSample/8 - 1];
else
dsb->convert = convertbpp[dsb->pwfx->wBitsPerSample/8 - 1][dsb->device->pwfx->wBitsPerSample/8 - 1];
dsb->resampleinmixer = FALSE;
if (needremix)
{
if (needresample)
DSOUND_RecalcFreqAcc(dsb);
else
dsb->tmp_buffer_len = dsb->buflen / bAlign * pAlign;
dsb->max_buffer_len = dsb->tmp_buffer_len;
if ((dsb->max_buffer_len <= dsb->device->buflen || dsb->max_buffer_len < ds_snd_shadow_maxsize * 1024 * 1024) && ds_snd_shadow_maxsize >= 0)
dsb->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, dsb->max_buffer_len);
if (dsb->tmp_buffer)
FillMemory(dsb->tmp_buffer, dsb->tmp_buffer_len, dsb->device->pwfx->wBitsPerSample == 8 ? 128 : 0);
else
dsb->resampleinmixer = TRUE;
}
else dsb->max_buffer_len = dsb->tmp_buffer_len = dsb->buflen;
dsb->buf_mixpos = DSOUND_secpos_to_bufpos(dsb, dsb->sec_mixpos, 0, NULL);
}
/**
* Recalculate the size for temporary buffer, and new writelead
* Should be called when one of the following things occur:
* - Primary buffer format is changed
* - This buffer format (frequency) is changed
*
* After this, DSOUND_MixToTemporary(dsb, 0, dsb->buflen) should
* be called to refill the temporary buffer with data.
*/
void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb)
{
BOOL needremix = TRUE, needresample = (dsb->freq != dsb->device->pwfx->nSamplesPerSec);
DWORD bAlign = dsb->pwfx->nBlockAlign, pAlign = dsb->device->pwfx->nBlockAlign;
TRACE("(%p)\n",dsb);
/* calculate the 10ms write lead */
dsb->writelead = (dsb->freq / 100) * dsb->pwfx->nBlockAlign;
if ((dsb->pwfx->wBitsPerSample == dsb->device->pwfx->wBitsPerSample) &&
(dsb->pwfx->nChannels == dsb->device->pwfx->nChannels) && !needresample)
needremix = FALSE;
HeapFree(GetProcessHeap(), 0, dsb->tmp_buffer);
dsb->tmp_buffer = NULL;
dsb->max_buffer_len = dsb->freqAcc = dsb->freqAccNext = 0;
dsb->freqneeded = needresample;
dsb->convert = convertbpp[dsb->pwfx->wBitsPerSample/8 - 1][dsb->device->pwfx->wBitsPerSample/8 - 1];
dsb->resampleinmixer = FALSE;
if (needremix)
{
if (needresample)
DSOUND_RecalcFreqAcc(dsb);
else
dsb->tmp_buffer_len = dsb->buflen / bAlign * pAlign;
dsb->max_buffer_len = dsb->tmp_buffer_len;
if ((dsb->max_buffer_len <= dsb->device->buflen || dsb->max_buffer_len < ds_snd_shadow_maxsize * 1024 * 1024) && ds_snd_shadow_maxsize >= 0)
dsb->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, dsb->max_buffer_len);
if (dsb->tmp_buffer)
FillMemory(dsb->tmp_buffer, dsb->tmp_buffer_len, dsb->device->pwfx->wBitsPerSample == 8 ? 128 : 0);
else
dsb->resampleinmixer = TRUE;
}
else dsb->max_buffer_len = dsb->tmp_buffer_len = dsb->buflen;
dsb->buf_mixpos = DSOUND_secpos_to_bufpos(dsb, dsb->sec_mixpos, 0, NULL);
}
/**
* Mix at most the given amount of data into the allocated temporary buffer
* of the given secondary buffer, starting from the dsb's first currently
* unsampled frame (writepos), translating frequency (pitch), stereo/mono
* and bits-per-sample so that it is ideal for the primary buffer.
* Doesn't perform any mixing - this is a straight copy/convert operation.
*
* dsb = the secondary buffer
* writepos = Starting position of changed buffer
* len = number of bytes to resample from writepos
*
* NOTE: writepos + len <= buflen. When called by mixer, MixOne makes sure of this.
*/
void DSOUND_MixToTemporary(const IDirectSoundBufferImpl *dsb, DWORD writepos, DWORD len, BOOL inmixer)
{
INT size;
BYTE *ibp, *obp, *obp_begin;
INT iAdvance = dsb->pwfx->nBlockAlign;
INT oAdvance = dsb->device->pwfx->nBlockAlign;
DWORD freqAcc, target_writepos = 0, overshot, maxlen;
/* We resample only when needed */
if ((dsb->tmp_buffer && inmixer) || (!dsb->tmp_buffer && !inmixer) || dsb->resampleinmixer != inmixer)
return;
assert(writepos + len <= dsb->buflen);
if (inmixer && writepos + len < dsb->buflen)
len += dsb->pwfx->nBlockAlign;
maxlen = DSOUND_secpos_to_bufpos(dsb, len, 0, NULL);
ibp = dsb->buffer->memory + writepos;
if (!inmixer)
obp_begin = dsb->tmp_buffer;
else if (dsb->device->tmp_buffer_len < maxlen || !dsb->device->tmp_buffer)
{
dsb->device->tmp_buffer_len = maxlen;
if (dsb->device->tmp_buffer)
dsb->device->tmp_buffer = HeapReAlloc(GetProcessHeap(), 0, dsb->device->tmp_buffer, maxlen);
else
dsb->device->tmp_buffer = HeapAlloc(GetProcessHeap(), 0, maxlen);
obp_begin = dsb->device->tmp_buffer;
}
else
obp_begin = dsb->device->tmp_buffer;
TRACE("(%p, %p)\n", dsb, ibp);
size = len / iAdvance;
/* Check for same sample rate */
if (dsb->freq == dsb->device->pwfx->nSamplesPerSec) {
TRACE("(%p) Same sample rate %d = primary %d\n", dsb,
dsb->freq, dsb->device->pwfx->nSamplesPerSec);
obp = obp_begin;
if (!inmixer)
obp += writepos/iAdvance*oAdvance;
cp_fields(dsb, ibp, obp, iAdvance, oAdvance, size, 0, 1 << DSOUND_FREQSHIFT);
return;
}
/* Mix in different sample rates */
TRACE("(%p) Adjusting frequency: %d -> %d\n", dsb, dsb->freq, dsb->device->pwfx->nSamplesPerSec);
target_writepos = DSOUND_secpos_to_bufpos(dsb, writepos, dsb->sec_mixpos, &freqAcc);
overshot = freqAcc >> DSOUND_FREQSHIFT;
if (overshot)
{
if (overshot >= size)
return;
size -= overshot;
writepos += overshot * iAdvance;
if (writepos >= dsb->buflen)
return;
ibp = dsb->buffer->memory + writepos;
freqAcc &= (1 << DSOUND_FREQSHIFT) - 1;
TRACE("Overshot: %d, freqAcc: %04x\n", overshot, freqAcc);
}
if (!inmixer)
obp = obp_begin + target_writepos;
else obp = obp_begin;
/* FIXME: Small problem here when we're overwriting buf_mixpos, it then STILL uses old freqAcc, not sure if it matters or not */
cp_fields(dsb, ibp, obp, iAdvance, oAdvance, size, freqAcc, dsb->freqAdjust);
}
