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fix some dumb sync bugs

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This commit is contained in:
Glenn Maynard
2002-12-29 00:19:05 +00:00
parent 99c7352994
commit f87e63a386
2 changed files with 7 additions and 6 deletions
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stepmania/src/arch/Sound/DSoundHelpers.cpp
+5 -4
View File
@@ -151,7 +151,7 @@ bool DSoundBuf::get_output_buf(char **buffer, unsigned *bufsiz, int *play_pos, i
/* Increment last_cursor_pos to point at where the data we're about to
* ask for will actually be played. */
last_cursor_pos += buffersize_frames();
last_cursor_pos += num_bytes_empty / samplesize();
buffer_locked = true;
@@ -169,9 +169,10 @@ int DSoundBuf::GetPosition() const
{
DWORD cursor, junk;
buf->GetCurrentPosition(&cursor, &junk);
int last_fill = write_cursor;
int cursor_frames = int(cursor) / samplesize();
int write_cursor_frames = write_cursor / samplesize();
int frames_behind = (last_fill - int(cursor)) / samplesize();
int frames_behind = write_cursor_frames - cursor_frames;
if(frames_behind <= 0)
frames_behind += buffersize_frames(); /* unwrap */
@@ -187,7 +188,7 @@ int DSoundBuf::GetPosition() const
void DSoundBuf::Play()
{
HRESULT hr = buf->Play(0, 0, DSBPLAY_LOOPING);
buf->Play(0, 0, DSBPLAY_LOOPING);
}
void DSoundBuf::Stop()
stepmania/src/arch/Sound/DSoundHelpers.h
+2 -2
View File
@@ -25,9 +25,9 @@ class DSoundBuf
int channels, samplerate, samplebits, buffersize;
int buffersize_frames() const { return buffersize / samplesize(); }
int samplesize() const { return samplebits; }
int samplesize() const { return channels*samplebits/8; }
int write_cursor, last_cursor_pos;
int write_cursor, last_cursor_pos; /* frames */
mutable int LastPosition;
bool buffer_locked;