audio.c

Wine-20031016

	/* this will be used to check if the given wave header has been fully played or not... */
        lpWaveHdr->reserved = lpWaveHdr->dwBufferLength;
        /* If we wrote all current wavehdr, skip to the next one */
        wodPlayer_PlayPtrNext(wwo);
    }
    *frames -= written;
    wwo->dwPlayedTotal += snd_pcm_frames_to_bytes(wwo->p_handle, written);

    return written;
}


/**************************************************************************
 * 				wodPlayer_NotifyCompletions	[internal]
 *
 * Notifies and remove from queue all wavehdrs which have been played to
 * the speaker (ie. they have cleared the ALSA buffer).  If force is true,
 * we notify all wavehdrs and remove them all from the queue even if they
 * are unplayed or part of a loop.
 */
static DWORD wodPlayer_NotifyCompletions(WINE_WAVEOUT* wwo, BOOL force)
{
    LPWAVEHDR		lpWaveHdr;

    /* Start from lpQueuePtr and keep notifying until:
     * - we hit an unwritten wavehdr
     * - we hit the beginning of a running loop
     * - we hit a wavehdr which hasn't finished playing
     */
    while ((lpWaveHdr = wwo->lpQueuePtr) &&
           (force ||
            (lpWaveHdr != wwo->lpPlayPtr &&
             lpWaveHdr != wwo->lpLoopPtr &&
             lpWaveHdr->reserved == lpWaveHdr->dwBufferLength))) {

	wwo->lpQueuePtr = lpWaveHdr->lpNext;

	lpWaveHdr->dwFlags &= ~WHDR_INQUEUE;
	lpWaveHdr->dwFlags |= WHDR_DONE;

	wodNotifyClient(wwo, WOM_DONE, (DWORD)lpWaveHdr, 0);
    }
    return  (lpWaveHdr && lpWaveHdr != wwo->lpPlayPtr && lpWaveHdr != wwo->lpLoopPtr) ?
        wodPlayer_NotifyWait(wwo, lpWaveHdr) : INFINITE;
}


void wait_for_poll(snd_pcm_t *handle, struct pollfd *ufds, unsigned int count)
{
    unsigned short revents;

    if (snd_pcm_state(handle) != SND_PCM_STATE_RUNNING)
	return;

    while (1) {
	poll(ufds, count, -1);
	snd_pcm_poll_descriptors_revents(handle, ufds, count, &revents);

	if (revents & POLLERR)
	    return;

	/*if (revents & POLLOUT)
		return 0;*/
    }
}


/**************************************************************************
 * 				wodPlayer_Reset			[internal]
 *
 * wodPlayer helper. Resets current output stream.
 */
static	void	wodPlayer_Reset(WINE_WAVEOUT* wwo)
{
    enum win_wm_message	msg;
    DWORD		        param;
    HANDLE		        ev;
    int                         err;

    /* flush all possible output */
    wait_for_poll(wwo->p_handle, wwo->ufds, wwo->count);

    /* updates current notify list */
    wodPlayer_NotifyCompletions(wwo, FALSE);

    if ( (err = snd_pcm_drop(wwo->p_handle)) < 0) {
	FIXME("flush: %s\n", snd_strerror(err));
	wwo->hThread = 0;
	wwo->state = WINE_WS_STOPPED;
	ExitThread(-1);
    }
    if ( (err = snd_pcm_prepare(wwo->p_handle)) < 0 )
        ERR("pcm prepare failed: %s\n", snd_strerror(err));

    /* remove any buffer */
    wodPlayer_NotifyCompletions(wwo, TRUE);

    wwo->lpPlayPtr = wwo->lpQueuePtr = wwo->lpLoopPtr = NULL;
    wwo->state = WINE_WS_STOPPED;

    /* remove any existing message in the ring */
    EnterCriticalSection(&wwo->msgRing.msg_crst);
    /* return all pending headers in queue */
    while (ALSA_RetrieveRingMessage(&wwo->msgRing, &msg, &param, &ev))
    {
        if (msg != WINE_WM_HEADER)
        {
            FIXME("shouldn't have headers left\n");
            SetEvent(ev);
            continue;
        }
        ((LPWAVEHDR)param)->dwFlags &= ~WHDR_INQUEUE;
        ((LPWAVEHDR)param)->dwFlags |= WHDR_DONE;

        wodNotifyClient(wwo, WOM_DONE, param, 0);
    }
    ResetEvent(wwo->msgRing.msg_event);
    LeaveCriticalSection(&wwo->msgRing.msg_crst);
}

/**************************************************************************
 * 		      wodPlayer_ProcessMessages			[internal]
 */
static void wodPlayer_ProcessMessages(WINE_WAVEOUT* wwo)
{
    LPWAVEHDR           lpWaveHdr;
    enum win_wm_message	msg;
    DWORD		param;
    HANDLE		ev;
    int                 err;

    while (ALSA_RetrieveRingMessage(&wwo->msgRing, &msg, &param, &ev)) {
    /* TRACE("Received %s %lx\n", wodPlayerCmdString[msg - WM_USER - 1], param); */

	switch (msg) {
	case WINE_WM_PAUSING:
	    if ( snd_pcm_state(wwo->p_handle) == SND_PCM_STATE_RUNNING )
	     {
		err = snd_pcm_pause(wwo->p_handle, 1);
		if ( err < 0 )
		    ERR("pcm_pause failed: %s\n", snd_strerror(err));
	     }
	    wwo->state = WINE_WS_PAUSED;
	    SetEvent(ev);
	    break;
	case WINE_WM_RESTARTING:
            if (wwo->state == WINE_WS_PAUSED)
            {
		if ( snd_pcm_state(wwo->p_handle) == SND_PCM_STATE_PAUSED )
		 {
		    err = snd_pcm_pause(wwo->p_handle, 0);
		    if ( err < 0 )
		        ERR("pcm_pause failed: %s\n", snd_strerror(err));
		 }
                wwo->state = WINE_WS_PLAYING;
            }
	    SetEvent(ev);
	    break;
	case WINE_WM_HEADER:
	    lpWaveHdr = (LPWAVEHDR)param;

	    /* insert buffer at the end of queue */
	    {
		LPWAVEHDR*	wh;
		for (wh = &(wwo->lpQueuePtr); *wh; wh = &((*wh)->lpNext));
		*wh = lpWaveHdr;
	    }
            if (!wwo->lpPlayPtr)
                wodPlayer_BeginWaveHdr(wwo,lpWaveHdr);
	    if (wwo->state == WINE_WS_STOPPED)
		wwo->state = WINE_WS_PLAYING;
	    break;
	case WINE_WM_RESETTING:
	    wodPlayer_Reset(wwo);
	    SetEvent(ev);
	    break;
        case WINE_WM_UPDATE:
            wodUpdatePlayedTotal(wwo, NULL);
	    SetEvent(ev);
            break;
        case WINE_WM_BREAKLOOP:
            if (wwo->state == WINE_WS_PLAYING && wwo->lpLoopPtr != NULL) {
                /* ensure exit at end of current loop */
                wwo->dwLoops = 1;
            }
	    SetEvent(ev);
            break;
	case WINE_WM_CLOSING:
	    /* sanity check: this should not happen since the device must have been reset before */
	    if (wwo->lpQueuePtr || wwo->lpPlayPtr) ERR("out of sync\n");
	    wwo->hThread = 0;
	    wwo->state = WINE_WS_CLOSED;
	    SetEvent(ev);
	    ExitThread(0);
	    /* shouldn't go here */
	default:
	    FIXME("unknown message %d\n", msg);
	    break;
	}
    }
}

/**************************************************************************
 * 			     wodPlayer_FeedDSP			[internal]
 * Feed as much sound data as we can into the DSP and return the number of
 * milliseconds before it will be necessary to feed the DSP again.
 */
static DWORD wodPlayer_FeedDSP(WINE_WAVEOUT* wwo)
{
    DWORD               availInQ = snd_pcm_avail_update(wwo->p_handle);

    /* no more room... no need to try to feed */
    while (wwo->lpPlayPtr && availInQ > 0)
        if ( wodPlayer_WriteMaxFrags(wwo, &availInQ) < 0 )
	    break;

    return wodPlayer_DSPWait(wwo);
}

/**************************************************************************
 * 				wodPlayer			[internal]
 */
static	DWORD	CALLBACK	wodPlayer(LPVOID pmt)
{
    WORD	  uDevID = (DWORD)pmt;
    WINE_WAVEOUT* wwo = (WINE_WAVEOUT*)&WOutDev[uDevID];
    DWORD         dwNextFeedTime = INFINITE;   /* Time before DSP needs feeding */
    DWORD         dwNextNotifyTime = INFINITE; /* Time before next wave completion */
    DWORD         dwSleepTime;

    wwo->state = WINE_WS_STOPPED;
    SetEvent(wwo->hStartUpEvent);

    for (;;) {
        /** Wait for the shortest time before an action is required.  If there
         *  are no pending actions, wait forever for a command.
         */
        dwSleepTime = min(dwNextFeedTime, dwNextNotifyTime);
        TRACE("waiting %lums (%lu,%lu)\n", dwSleepTime, dwNextFeedTime, dwNextNotifyTime);
        WaitForSingleObject(wwo->msgRing.msg_event, dwSleepTime);
	wodPlayer_ProcessMessages(wwo);
	if (wwo->state == WINE_WS_PLAYING) {
	    dwNextFeedTime = wodPlayer_FeedDSP(wwo);
	    dwNextNotifyTime = wodPlayer_NotifyCompletions(wwo, FALSE);
	} else {
	    dwNextFeedTime = dwNextNotifyTime = INFINITE;
	}
    }
}

/**************************************************************************
 * 			wodGetDevCaps				[internal]
 */
static DWORD wodGetDevCaps(WORD wDevID, LPWAVEOUTCAPSA lpCaps, DWORD dwSize)
{
    TRACE("(%u, %p, %lu);\n", wDevID, lpCaps, dwSize);

    if (lpCaps == NULL) return MMSYSERR_NOTENABLED;

    if (wDevID >= MAX_WAVEOUTDRV) {
	TRACE("MAX_WAVOUTDRV reached !\n");
	return MMSYSERR_BADDEVICEID;
    }

    memcpy(lpCaps, &WOutDev[wDevID].caps, min(dwSize, sizeof(*lpCaps)));
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 * 				wodOpen				[internal]
 */
static DWORD wodOpen(WORD wDevID, LPWAVEOPENDESC lpDesc, DWORD dwFlags)
{
    WINE_WAVEOUT*	        wwo;
    snd_pcm_hw_params_t *       hw_params;
    snd_pcm_sw_params_t *       sw_params;
    snd_pcm_access_t            access;
    snd_pcm_format_t            format;
    int                         rate;
    unsigned int                buffer_time = 500000;
    unsigned int                period_time = 10000;
    int                         buffer_size;
    snd_pcm_uframes_t           period_size;
    int                         flags;
    snd_pcm_t *                 pcm;
    int                         err;

    snd_pcm_hw_params_alloca(&hw_params);
    snd_pcm_sw_params_alloca(&sw_params);

    TRACE("(%u, %p, %08lX);\n", wDevID, lpDesc, dwFlags);
    if (lpDesc == NULL) {
	WARN("Invalid Parameter !\n");
	return MMSYSERR_INVALPARAM;
    }
    if (wDevID >= MAX_WAVEOUTDRV) {
	TRACE("MAX_WAVOUTDRV reached !\n");
	return MMSYSERR_BADDEVICEID;
    }

    /* only PCM format is supported so far... */
    if (lpDesc->lpFormat->wFormatTag != WAVE_FORMAT_PCM ||
	lpDesc->lpFormat->nChannels == 0 ||
	lpDesc->lpFormat->nSamplesPerSec == 0) {
	WARN("Bad format: tag=%04X nChannels=%d nSamplesPerSec=%ld !\n",
	     lpDesc->lpFormat->wFormatTag, lpDesc->lpFormat->nChannels,
	     lpDesc->lpFormat->nSamplesPerSec);
	return WAVERR_BADFORMAT;
    }

    if (dwFlags & WAVE_FORMAT_QUERY) {
	TRACE("Query format: tag=%04X nChannels=%d nSamplesPerSec=%ld !\n",
	     lpDesc->lpFormat->wFormatTag, lpDesc->lpFormat->nChannels,
	     lpDesc->lpFormat->nSamplesPerSec);
	return MMSYSERR_NOERROR;
    }

    wwo = &WOutDev[wDevID];

    if ((dwFlags & WAVE_DIRECTSOUND) && !(wwo->caps.dwSupport & WAVECAPS_DIRECTSOUND))
	/* not supported, ignore it */
	dwFlags &= ~WAVE_DIRECTSOUND;

    wwo->p_handle = 0;
    flags = SND_PCM_NONBLOCK;
    if ( dwFlags & WAVE_DIRECTSOUND )
    	flags |= SND_PCM_ASYNC;

    if (snd_pcm_open(&pcm, wwo->device, SND_PCM_STREAM_PLAYBACK, dwFlags))
    {
        ERR("Error open: %s\n", snd_strerror(errno));
	return MMSYSERR_NOTENABLED;
    }

    wwo->wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);

    memcpy(&wwo->waveDesc, lpDesc, 	     sizeof(WAVEOPENDESC));
    memcpy(&wwo->format,   lpDesc->lpFormat, sizeof(PCMWAVEFORMAT));

    if (wwo->format.wBitsPerSample == 0) {
	WARN("Resetting zeroed wBitsPerSample\n");
	wwo->format.wBitsPerSample = 8 *
	    (wwo->format.wf.nAvgBytesPerSec /
	     wwo->format.wf.nSamplesPerSec) /
	    wwo->format.wf.nChannels;
    }

    snd_pcm_hw_params_any(pcm, hw_params);

#define EXIT_ON_ERROR(f,e,txt) do \
{ \
    int err; \
    if ( (err = (f) ) < 0) \
    { \
	ERR(txt ": %s\n", snd_strerror(err)); \
	snd_pcm_close(pcm); \
	return e; \
    } \
} while(0)

    access = SND_PCM_ACCESS_MMAP_INTERLEAVED;
    if ( ( err = snd_pcm_hw_params_set_access(pcm, hw_params, access ) ) < 0) {
        WARN("mmap not available. switching to standard write.\n");
        access = SND_PCM_ACCESS_RW_INTERLEAVED;
	EXIT_ON_ERROR( snd_pcm_hw_params_set_access(pcm, hw_params, access ), MMSYSERR_INVALPARAM, "unable to set access for playback");
	wwo->write = snd_pcm_writei;
    }
    else
	wwo->write = snd_pcm_mmap_writei;

    EXIT_ON_ERROR( snd_pcm_hw_params_set_channels(pcm, hw_params, wwo->format.wf.nChannels), MMSYSERR_INVALPARAM, "unable to set required channels");

    format = (wwo->format.wBitsPerSample == 16) ? SND_PCM_FORMAT_S16_LE : SND_PCM_FORMAT_U8;
    EXIT_ON_ERROR( snd_pcm_hw_params_set_format(pcm, hw_params, format), MMSYSERR_INVALPARAM, "unable to set required format");

    rate = snd_pcm_hw_params_set_rate_near(pcm, hw_params, wwo->format.wf.nSamplesPerSec, 0);
    if (rate < 0) {
	ERR("Rate %ld Hz not available for playback: %s\n", wwo->format.wf.nSamplesPerSec, snd_strerror(rate));
	snd_pcm_close(pcm);
        return WAVERR_BADFORMAT;
    }
    if (rate != wwo->format.wf.nSamplesPerSec) {
	ERR("Rate doesn't match (requested %ld Hz, got %d Hz)\n", wwo->format.wf.nSamplesPerSec, rate);
	snd_pcm_close(pcm);
        return WAVERR_BADFORMAT;
    }
    
    EXIT_ON_ERROR( snd_pcm_hw_params_set_buffer_time_near(pcm, hw_params, buffer_time, 0), MMSYSERR_INVALPARAM, "unable to set buffer time");
    EXIT_ON_ERROR( snd_pcm_hw_params_set_period_time_near(pcm, hw_params, period_time, 0), MMSYSERR_INVALPARAM, "unable to set period time");

    EXIT_ON_ERROR( snd_pcm_hw_params(pcm, hw_params), MMSYSERR_INVALPARAM, "unable to set hw params for playback");
    
    period_size = snd_pcm_hw_params_get_period_size(hw_params, 0);
    buffer_size = snd_pcm_hw_params_get_buffer_size(hw_params);

    snd_pcm_sw_params_current(pcm, sw_params);
    EXIT_ON_ERROR( snd_pcm_sw_params_set_start_threshold(pcm, sw_params, dwFlags & WAVE_DIRECTSOUND ? INT_MAX : 1 ), MMSYSERR_ERROR, "unable to set start threshold");
    EXIT_ON_ERROR( snd_pcm_sw_params_set_silence_size(pcm, sw_params, 0), MMSYSERR_ERROR, "unable to set silence size");