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More fixups in DSound.

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This commit is contained in:
Themaister 2011-08-05 14:01:58 +02:00
parent ac4219bcde
commit 9aef33aabd
1 changed files with 33 additions and 37 deletions
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70
audio/dsound.c
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@ -54,20 +54,26 @@ static inline void get_positions(dsound_t *ds, DWORD *read_ptr, DWORD *write_ptr
#define CHUNK_SIZE 256
#define BUFFER_ERROR ((void*)-1)
static inline void* grab_chunk(dsound_t *ds, DWORD write_ptr)
struct audio_lock
{
void *chunk = NULL;
DWORD bytes = 0;
HRESULT res = IDirectSoundBuffer_Lock(ds->dsb, write_ptr, CHUNK_SIZE, &chunk, &bytes, NULL, NULL, 0);
void *chunk1;
DWORD size1;
void *chunk2;
DWORD size2;
};
static inline bool grab_region(dsound_t *ds, DWORD write_ptr, struct audio_lock *region)
{
HRESULT res = IDirectSoundBuffer_Lock(ds->dsb, write_ptr, CHUNK_SIZE, &region->chunk1, &region->size1, &region->chunk2, &region->size2, 0);
if (res == DSERR_BUFFERLOST)
{
res = IDirectSoundBuffer_Restore(ds->dsb);
if (res != DS_OK)
return BUFFER_ERROR;
return false;
res = IDirectSoundBuffer_Lock(ds->dsb, write_ptr, CHUNK_SIZE, &chunk, &bytes, NULL, NULL, 0);
res = IDirectSoundBuffer_Lock(ds->dsb, write_ptr, CHUNK_SIZE, &region->chunk1, &region->size1, &region->chunk2, &region->size2, 0);
if (res != DS_OK)
return NULL;
return false;
}
const char *err;
@ -91,22 +97,17 @@ static inline void* grab_chunk(dsound_t *ds, DWORD write_ptr)
}
if (err)
SSNES_WARN("[DirectSound error]: %s\n", err);
if (bytes != CHUNK_SIZE)
{
SSNES_ERR("[DirectSound]: Could not lock as much data as requested, this should not happen!\n");
if (chunk)
IDirectSoundBuffer_Unlock(ds->dsb, chunk, bytes, NULL, 0);
return NULL;
SSNES_WARN("[DirectSound error]: %s\n", err);
return false;
}
return chunk;
return true;
}
static inline void release_chunk(dsound_t *ds, void *ptr)
static inline void release_region(dsound_t *ds, const struct audio_lock *region)
{
IDirectSoundBuffer_Unlock(ds->dsb, ptr, CHUNK_SIZE, NULL, 0);
IDirectSoundBuffer_Unlock(ds->dsb, region->chunk1, region->size1, region->chunk2, region->size2);
}
static DWORD CALLBACK dsound_thread(PVOID data)
@ -139,44 +140,39 @@ static DWORD CALLBACK dsound_thread(PVOID data)
}
else if (fifo_avail < CHUNK_SIZE) // Got space to write, but nothing in FIFO (underrun), fill block with silence.
{
void *chunk;
if ((chunk = grab_chunk(ds, write_ptr)) == BUFFER_ERROR)
struct audio_lock region;
if (!grab_region(ds, write_ptr, &region))
{
ds->thread_alive = false;
SetEvent(ds->event);
break;
}
else if (chunk == NULL)
{
Sleep(1);
continue;
}
memset(chunk, 0, CHUNK_SIZE);
release_chunk(ds, chunk);
write_ptr = (write_ptr + CHUNK_SIZE) & buffer_mask;
memset(region.chunk1, 0, region.size1);
memset(region.chunk2, 0, region.size2);
release_region(ds, &region);
write_ptr = (write_ptr + region.size1 + region.size2) & buffer_mask;
}
else // All is good. Pull from it and notify FIFO :D
{
void *chunk;
if ((chunk = grab_chunk(ds, write_ptr)) == BUFFER_ERROR)
struct audio_lock region;
if (!grab_region(ds, write_ptr, &region))
{
ds->thread_alive = false;
SetEvent(ds->event);
break;
}
else if (chunk == NULL)
{
Sleep(1);
continue;
}
EnterCriticalSection(&ds->crit);
fifo_read(ds->buffer, chunk, CHUNK_SIZE);
if (region.chunk1)
fifo_read(ds->buffer, region.chunk1, region.size1);
if (region.chunk2)
fifo_read(ds->buffer, region.chunk2, region.size2);
LeaveCriticalSection(&ds->crit);
release_chunk(ds, chunk);
write_ptr = (write_ptr + CHUNK_SIZE) & buffer_mask;
release_region(ds, &region);
write_ptr = (write_ptr + region.size1 + region.size2) & buffer_mask;
SetEvent(ds->event);
}