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(XAudio) If xa->nonblock is true - point write callback to

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specialized version of the function
This commit is contained in:
twinaphex 2020-01-02 20:33:21 +01:00
parent 42c3072ff9
commit 41e32ea949
1 changed files with 61 additions and 2 deletions
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63
audio/drivers/xaudio.c
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@ -322,7 +322,7 @@ static void *xa_init(const char *device, unsigned rate, unsigned latency,
return xa;
}
static ssize_t xa_write(void *data, const void *buf, size_t size)
static ssize_t xa_write_nonblock(void *data, const void *buf, size_t size)
{
unsigned bytes;
xa_t *xa = (xa_t*)data;
@ -387,6 +387,59 @@ static ssize_t xa_write(void *data, const void *buf, size_t size)
return size;
}
static ssize_t xa_write(void *data, const void *buf, size_t size)
{
xa_t *xa = (xa_t*)data;
xaudio2_t *handle = xa->xa;
const uint8_t *buffer = (const uint8_t*)buf;
unsigned bytes = size;
while (bytes)
{
unsigned need = MIN(bytes, handle->bufsize - handle->bufptr);
memcpy(handle->buf + handle->write_buffer *
handle->bufsize + handle->bufptr,
buffer, need);
handle->bufptr += need;
buffer += need;
bytes -= need;
if (handle->bufptr == handle->bufsize)
{
XAUDIO2_BUFFER xa2buffer;
while (handle->buffers == MAX_BUFFERS - 1)
WaitForSingleObject(handle->hEvent, INFINITE);
xa2buffer.Flags = 0;
xa2buffer.AudioBytes = handle->bufsize;
xa2buffer.pAudioData = handle->buf + handle->write_buffer * handle->bufsize;
xa2buffer.PlayBegin = 0;
xa2buffer.PlayLength = 0;
xa2buffer.LoopBegin = 0;
xa2buffer.LoopLength = 0;
xa2buffer.LoopCount = 0;
xa2buffer.pContext = NULL;
if (FAILED(IXAudio2SourceVoice_SubmitSourceBuffer(
handle->pSourceVoice, &xa2buffer, NULL)))
{
if (size > 0)
return -1;
return 0;
}
InterlockedIncrement((LONG volatile*)&handle->buffers);
handle->bufptr = 0;
handle->write_buffer = (handle->write_buffer + 1) & MAX_BUFFERS_MASK;
}
}
return size;
}
static bool xa_stop(void *data)
{
xa_t *xa = (xa_t*)data;
@ -406,7 +459,13 @@ static void xa_set_nonblock_state(void *data, bool state)
{
xa_t *xa = (xa_t*)data;
if (xa)
xa->nonblock = state;
{
xa->nonblock = state;
if (xa->nonblock)
audio_xa.write = xa_write_nonblock;
else
audio_xa.write = xa_write;
}
}
static bool xa_start(void *data, bool is_shutdown)