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Fixed bug in capture stop. Only current header should be returned to 

app.
Make wave fragment size adjustable to guarantee better than 10 ms
latency.  Makes a difference for 8 kHz voice apps.
This commit is contained in:
Robert Reif 2003-11-04 04:20:47 +00:00 committed by Alexandre Julliard
parent 35645ca40c
commit 0c55534707
1 changed files with 54 additions and 14 deletions
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68
dlls/winmm/wineoss/audio.c
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@ -375,7 +375,7 @@ static DWORD OSS_RawOpenDevice(OSS_DEVICE* ossdev, int strict_format)
error:
close(fd);
return WAVERR_BADFORMAT;
error2:
error2:
close(fd);
return MMSYSERR_ERROR;
}
@ -1534,12 +1534,21 @@ static DWORD wodOpen(WORD wDevID, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
* let's try to fragment the above 64KB (256 * 2^8) */
audio_fragment = 0x01000008;
} else {
/* shockwave player uses only 4 1k-fragments at a rate of 22050 bytes/sec
* thus leading to 46ms per fragment, and a turnaround time of 185ms
/* A wave device must have a worst case latency of 10 ms so calculate
* the largest fragment size less than 10 ms long.
*/
/* 16 fragments max, 2^10=1024 bytes per fragment */
audio_fragment = 0x000F000A;
int fsize = lpDesc->lpFormat->nAvgBytesPerSec / 100; /* 10 ms chunk */
int shift = 0;
while ((1 << shift) <= fsize)
shift++;
shift--;
audio_fragment = 0x00100000 + shift; /* 16 fragments of 2^shift */
}
TRACE("using %d %d byte fragments (%ld ms)\n", audio_fragment >> 16,
1 << (audio_fragment & 0xffff),
((1 << (audio_fragment & 0xffff)) * 1000) / lpDesc->lpFormat->nAvgBytesPerSec);
if (wwo->state != WINE_WS_CLOSED) return MMSYSERR_ALLOCATED;
/* we want to be able to mmap() the device, which means it must be opened readable,
* otherwise mmap() will fail (at least under Linux) */
@ -2794,6 +2803,34 @@ static DWORD CALLBACK widRecorder(LPVOID pmt)
}
break;
case WINE_WM_STOPPING:
wwi->state = WINE_WS_STOPPED;
wwi->dwTotalRecorded = 0;
if (wwi->state != WINE_WS_STOPPED)
{
if (wwi->ossdev->bTriggerSupport)
{
/* stop the recording */
wwi->ossdev->bInputEnabled = FALSE;
enable = getEnables(wwi->ossdev);
if (ioctl(wwi->ossdev->fd, SNDCTL_DSP_SETTRIGGER, &enable) < 0) {
wwi->ossdev->bInputEnabled = FALSE;
ERR("ioctl(%s, SNDCTL_DSP_SETTRIGGER) failed (%s)\n", wwi->ossdev->dev_name, strerror(errno));
}
}
/* return current buffer to app */
lpWaveHdr = wwi->lpQueuePtr;
if (lpWaveHdr)
{
LPWAVEHDR lpNext = lpWaveHdr->lpNext;
TRACE("stop %p %p\n", lpWaveHdr, lpWaveHdr->lpNext);
lpWaveHdr->dwFlags &= ~WHDR_INQUEUE;
lpWaveHdr->dwFlags |= WHDR_DONE;
widNotifyClient(wwi, WIM_DATA, (DWORD)lpWaveHdr, 0);
wwi->lpQueuePtr = lpNext;
}
}
SetEvent(ev);
break;
case WINE_WM_RESETTING:
wwi->state = WINE_WS_STOPPED;
wwi->dwTotalRecorded = 0;
@ -2888,18 +2925,21 @@ static DWORD widOpen(WORD wDevID, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
* to do hardware playback without hardware capture. */
audio_fragment = wwi->ossdev->audio_fragment;
} else {
/* This is actually hand tuned to work so that my SB Live:
* - does not skip
* - does not buffer too much
* when sending with the Shoutcast winamp plugin
*/
/* 15 fragments max, 2^10 = 1024 bytes per fragment */
audio_fragment = 0x000F000A;
/* A wave device must have a worst case latency of 10 ms so calculate
* the largest fragment size less than 10 ms long.
*/
int fsize = lpDesc->lpFormat->nAvgBytesPerSec / 100; /* 10 ms chunk */
int shift = 0;
while ((1 << shift) <= fsize)
shift++;
shift--;
audio_fragment = 0x00100000 + shift; /* 16 fragments of 2^shift */
}
}
TRACE("using %d %d byte fragments\n", audio_fragment >> 16,
1 << (audio_fragment & 0xffff));
TRACE("using %d %d byte fragments (%ld ms)\n", audio_fragment >> 16,
1 << (audio_fragment & 0xffff),
((1 << (audio_fragment & 0xffff)) * 1000) / lpDesc->lpFormat->nAvgBytesPerSec);
ret = OSS_OpenDevice(wwi->ossdev, O_RDONLY, &audio_fragment,
1,