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Only convert bits per sample between different encoding formats.

This commit is contained in:
Robert Reif 2005-11-16 11:22:06 +00:00 committed by Alexandre Julliard
parent aa730cc9e4
commit 014ab5e249
1 changed files with 54 additions and 42 deletions
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96
dlls/winmm/wavemap/wavemap.c
View File

@ -194,7 +194,7 @@ static DWORD wodOpen(LPDWORD lpdwUser, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
}
}
if ((dwFlags & WAVE_FORMAT_DIRECT) == 0 && lpDesc->lpFormat->wFormatTag == WAVE_FORMAT_PCM) {
if ((dwFlags & WAVE_FORMAT_DIRECT) == 0) {
WAVEFORMATEX wfx;
wfx.wFormatTag = WAVE_FORMAT_PCM;
@ -208,51 +208,63 @@ static DWORD wodOpen(LPDWORD lpdwUser, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
default: goto error; \
}
/* Our resampling algorithm is quite primitive so first try
* to just change the bit depth and number of channels
*/
for (i = ndlo; i < ndhi; i++) {
wfx.nSamplesPerSec=lpDesc->lpFormat->nSamplesPerSec;
wfx.nChannels = lpDesc->lpFormat->nChannels;
TRY(wfx.nSamplesPerSec, 16);
TRY(wfx.nSamplesPerSec, 8);
wfx.nChannels ^= 3;
TRY(wfx.nSamplesPerSec, 16);
TRY(wfx.nSamplesPerSec, 8);
}
if (lpDesc->lpFormat->wFormatTag != WAVE_FORMAT_PCM) {
/* Format changed so keep sample rate and number of channels
* the same and just change the bit depth
*/
for (i = ndlo; i < ndhi; i++) {
wfx.nSamplesPerSec=lpDesc->lpFormat->nSamplesPerSec;
wfx.nChannels = lpDesc->lpFormat->nChannels;
TRY(wfx.nSamplesPerSec, 16);
TRY(wfx.nSamplesPerSec, 8);
}
} else {
/* Our resampling algorithm is quite primitive so first try
* to just change the bit depth and number of channels
*/
for (i = ndlo; i < ndhi; i++) {
wfx.nSamplesPerSec=lpDesc->lpFormat->nSamplesPerSec;
wfx.nChannels = lpDesc->lpFormat->nChannels;
TRY(wfx.nSamplesPerSec, 16);
TRY(wfx.nSamplesPerSec, 8);
wfx.nChannels ^= 3;
TRY(wfx.nSamplesPerSec, 16);
TRY(wfx.nSamplesPerSec, 8);
}
for (i = ndlo; i < ndhi; i++) {
/* first try with same stereo/mono option as source */
wfx.nChannels = lpDesc->lpFormat->nChannels;
TRY(96000, 16);
TRY(48000, 16);
TRY(44100, 16);
TRY(22050, 16);
TRY(11025, 16);
for (i = ndlo; i < ndhi; i++) {
/* first try with same stereo/mono option as source */
wfx.nChannels = lpDesc->lpFormat->nChannels;
TRY(96000, 16);
TRY(48000, 16);
TRY(44100, 16);
TRY(22050, 16);
TRY(11025, 16);
/* 2^3 => 1, 1^3 => 2, so if stereo, try mono (and the other way around) */
wfx.nChannels ^= 3;
TRY(96000, 16);
TRY(48000, 16);
TRY(44100, 16);
TRY(22050, 16);
TRY(11025, 16);
/* 2^3 => 1, 1^3 => 2, so if stereo, try mono (and the other way around) */
wfx.nChannels ^= 3;
TRY(96000, 16);
TRY(48000, 16);
TRY(44100, 16);
TRY(22050, 16);
TRY(11025, 16);
/* first try with same stereo/mono option as source */
wfx.nChannels = lpDesc->lpFormat->nChannels;
TRY(96000, 8);
TRY(48000, 8);
TRY(44100, 8);
TRY(22050, 8);
TRY(11025, 8);
/* first try with same stereo/mono option as source */
wfx.nChannels = lpDesc->lpFormat->nChannels;
TRY(96000, 8);
TRY(48000, 8);
TRY(44100, 8);
TRY(22050, 8);
TRY(11025, 8);
/* 2^3 => 1, 1^3 => 2, so if stereo, try mono (and the other way around) */
wfx.nChannels ^= 3;
TRY(96000, 8);
TRY(48000, 8);
TRY(44100, 8);
TRY(22050, 8);
TRY(11025, 8);
/* 2^3 => 1, 1^3 => 2, so if stereo, try mono (and the other way around) */
wfx.nChannels ^= 3;
TRY(96000, 8);
TRY(48000, 8);
TRY(44100, 8);
TRY(22050, 8);
TRY(11025, 8);
}
}
#undef TRY
}