Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 643 insertions, 0 deletions

diff --git a/sound/oss/emu10k1/cardwo.c b/sound/oss/emu10k1/cardwo.c
new file mode 100644
index 00000000000..54daca4f57b
--- /dev/null
+++ b/sound/oss/emu10k1/cardwo.c
@@ -0,0 +1,643 @@
+/*
+ **********************************************************************
+ *     cardwo.c - PCM output HAL for emu10k1 driver
+ *     Copyright 1999, 2000 Creative Labs, Inc.
+ *
+ **********************************************************************
+ *
+ *     Date                 Author          Summary of changes
+ *     ----                 ------          ------------------
+ *     October 20, 1999     Bertrand Lee    base code release
+ *
+ **********************************************************************
+ *
+ *     This program is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of
+ *     the License, or (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public
+ *     License along with this program; if not, write to the Free
+ *     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
+ *     USA.
+ *
+ **********************************************************************
+ */
+
+#include <linux/poll.h>
+#include "hwaccess.h"
+#include "8010.h"
+#include "voicemgr.h"
+#include "cardwo.h"
+#include "audio.h"
+
+static u32 samplerate_to_linearpitch(u32 samplingrate)
+{
+	samplingrate = (samplingrate << 8) / 375;
+	return (samplingrate >> 1) + (samplingrate & 1);
+}
+
+static void query_format(struct emu10k1_wavedevice *wave_dev, struct wave_format *wave_fmt)
+{
+	int i, j, do_passthrough = 0, is_ac3 = 0;
+	struct emu10k1_card *card = wave_dev->card;
+	struct woinst *woinst = wave_dev->woinst;
+
+	if ((wave_fmt->channels > 2) && (wave_fmt->id != AFMT_S16_LE) && (wave_fmt->id != AFMT_U8))
+		wave_fmt->channels = 2;
+
+	if ((wave_fmt->channels < 1) || (wave_fmt->channels > WAVEOUT_MAXVOICES))
+		wave_fmt->channels = 2;
+
+	if (wave_fmt->channels == 2)
+		woinst->num_voices = 1;
+	else
+		woinst->num_voices = wave_fmt->channels;
+
+	if (wave_fmt->samplingrate >= 0x2ee00)
+		wave_fmt->samplingrate = 0x2ee00;
+
+	wave_fmt->passthrough = 0;
+	do_passthrough = is_ac3 = 0;
+
+	if (card->pt.selected)
+		do_passthrough = 1;
+
+	switch (wave_fmt->id) {
+	case AFMT_S16_LE:
+		wave_fmt->bitsperchannel = 16;
+		break;
+	case AFMT_U8:
+		wave_fmt->bitsperchannel = 8;
+		break;
+	case AFMT_AC3:
+		do_passthrough = 1;
+		is_ac3 = 1;
+		break;
+	default:
+		wave_fmt->id = AFMT_S16_LE;
+		wave_fmt->bitsperchannel = 16;
+		break;
+	}	
+	if (do_passthrough) {
+		/* currently only one waveout instance may use pass-through */
+		if (woinst->state != WAVE_STATE_CLOSED || 
+		    card->pt.state != PT_STATE_INACTIVE ||
+		    (wave_fmt->samplingrate != 48000 && !is_ac3)) {
+			DPF(2, "unable to set pass-through mode\n");
+		} else if (USE_PT_METHOD1) {
+			i = emu10k1_find_control_gpr(&card->mgr, card->pt.patch_name, card->pt.intr_gpr_name);
+			j = emu10k1_find_control_gpr(&card->mgr, card->pt.patch_name, card->pt.enable_gpr_name);
+			if (i < 0 || j < 0)
+				DPF(2, "unable to set pass-through mode\n");
+			else {
+				wave_fmt->samplingrate = 48000;
+				wave_fmt->channels = 2;
+				card->pt.pos_gpr = emu10k1_find_control_gpr(&card->mgr, card->pt.patch_name,
+									    card->pt.pos_gpr_name);
+				wave_fmt->passthrough = 1;
+				card->pt.intr_gpr = i;
+				card->pt.enable_gpr = j;
+				card->pt.state = PT_STATE_INACTIVE;
+			
+				DPD(2, "is_ac3 is %d\n", is_ac3);
+				card->pt.ac3data = is_ac3;
+				wave_fmt->bitsperchannel = 16;
+			}
+		}else{
+			DPF(2, "Using Passthrough Method 2\n");
+			card->pt.enable_gpr = emu10k1_find_control_gpr(&card->mgr, card->pt.patch_name,
+								       card->pt.enable_gpr_name);
+			wave_fmt->passthrough = 2;
+			wave_fmt->bitsperchannel = 16;
+		}
+	}
+
+	wave_fmt->bytesperchannel = wave_fmt->bitsperchannel >> 3;
+	wave_fmt->bytespersample = wave_fmt->channels * wave_fmt->bytesperchannel;
+	wave_fmt->bytespersec = wave_fmt->bytespersample * wave_fmt->samplingrate;
+
+	if (wave_fmt->channels == 2)
+		wave_fmt->bytespervoicesample = wave_fmt->channels * wave_fmt->bytesperchannel;
+	else
+		wave_fmt->bytespervoicesample = wave_fmt->bytesperchannel;
+}
+
+static int get_voice(struct emu10k1_card *card, struct woinst *woinst, unsigned int voicenum)
+{
+	struct emu_voice *voice = &woinst->voice[voicenum];
+
+	/* Allocate voices here, if no voices available, return error. */
+
+	voice->usage = VOICE_USAGE_PLAYBACK;
+
+	voice->flags = 0;
+
+	if (woinst->format.channels == 2)
+		voice->flags |= VOICE_FLAGS_STEREO;
+
+	if (woinst->format.bitsperchannel == 16)
+		voice->flags |= VOICE_FLAGS_16BIT;
+
+	if (emu10k1_voice_alloc(card, voice) < 0) {
+		voice->usage = VOICE_USAGE_FREE;
+		return -1;
+	}
+
+	/* Calculate pitch */
+	voice->initial_pitch = (u16) (srToPitch(woinst->format.samplingrate) >> 8);
+	voice->pitch_target = samplerate_to_linearpitch(woinst->format.samplingrate);
+
+	DPD(2, "Initial pitch --> %#x\n", voice->initial_pitch);
+
+	voice->startloop = (voice->mem.emupageindex << 12) /
+	 woinst->format.bytespervoicesample;
+	voice->endloop = voice->startloop + woinst->buffer.size / woinst->format.bytespervoicesample;
+	voice->start = voice->startloop;
+
+	
+	voice->params[0].volume_target = 0xffff;
+	voice->params[0].initial_fc = 0xff;
+	voice->params[0].initial_attn = 0x00;
+	voice->params[0].byampl_env_sustain = 0x7f;
+	voice->params[0].byampl_env_decay = 0x7f;
+
+	
+	if (voice->flags & VOICE_FLAGS_STEREO) {
+		if (woinst->format.passthrough == 2) {
+			voice->params[0].send_routing  = voice->params[1].send_routing  = card->waveout.send_routing[ROUTE_PT];
+			voice->params[0].send_routing2 = voice->params[1].send_routing2 = card->waveout.send_routing2[ROUTE_PT];
+			voice->params[0].send_dcba = 0xff;
+			voice->params[1].send_dcba = 0xff00;
+			voice->params[0].send_hgfe = voice->params[1].send_hgfe=0;
+		} else {
+			voice->params[0].send_dcba = card->waveout.send_dcba[SEND_LEFT];
+			voice->params[0].send_hgfe = card->waveout.send_hgfe[SEND_LEFT];
+			voice->params[1].send_dcba = card->waveout.send_dcba[SEND_RIGHT];
+			voice->params[1].send_hgfe = card->waveout.send_hgfe[SEND_RIGHT];
+
+			if (woinst->device) {
+				// /dev/dps1
+				voice->params[0].send_routing  = voice->params[1].send_routing  = card->waveout.send_routing[ROUTE_PCM1];
+				voice->params[0].send_routing2 = voice->params[1].send_routing2 = card->waveout.send_routing2[ROUTE_PCM1];
+			} else {
+				voice->params[0].send_routing  = voice->params[1].send_routing  = card->waveout.send_routing[ROUTE_PCM];
+				voice->params[0].send_routing2 = voice->params[1].send_routing2 = card->waveout.send_routing2[ROUTE_PCM];
+			}
+		}
+		
+		voice->params[1].volume_target = 0xffff;
+		voice->params[1].initial_fc = 0xff;
+		voice->params[1].initial_attn = 0x00;
+		voice->params[1].byampl_env_sustain = 0x7f;
+		voice->params[1].byampl_env_decay = 0x7f;
+	} else {
+		if (woinst->num_voices > 1) {
+			// Multichannel pcm
+			voice->params[0].send_dcba=0xff;
+			voice->params[0].send_hgfe=0;
+			if (card->is_audigy) {
+				voice->params[0].send_routing = 0x3f3f3f00 + card->mchannel_fx + voicenum;
+				voice->params[0].send_routing2 = 0x3f3f3f3f;
+			} else {
+				voice->params[0].send_routing = 0xfff0 + card->mchannel_fx + voicenum;
+			}
+			
+		} else {
+			voice->params[0].send_dcba = card->waveout.send_dcba[SEND_MONO];
+			voice->params[0].send_hgfe = card->waveout.send_hgfe[SEND_MONO];
+
+			if (woinst->device) {
+				voice->params[0].send_routing = card->waveout.send_routing[ROUTE_PCM1];
+				voice->params[0].send_routing2 = card->waveout.send_routing2[ROUTE_PCM1];
+			} else {
+				voice->params[0].send_routing = card->waveout.send_routing[ROUTE_PCM];
+				voice->params[0].send_routing2 = card->waveout.send_routing2[ROUTE_PCM];
+			}
+		}
+	}
+
+	DPD(2, "voice: startloop=%#x, endloop=%#x\n", voice->startloop, voice->endloop);
+
+	emu10k1_voice_playback_setup(voice);
+
+	return 0;
+}
+
+int emu10k1_waveout_open(struct emu10k1_wavedevice *wave_dev)
+{
+	struct emu10k1_card *card = wave_dev->card;
+	struct woinst *woinst = wave_dev->woinst;
+	struct waveout_buffer *buffer = &woinst->buffer;
+	unsigned int voicenum;
+	u16 delay;
+
+	DPF(2, "emu10k1_waveout_open()\n");
+
+	for (voicenum = 0; voicenum < woinst->num_voices; voicenum++) {
+		if (emu10k1_voice_alloc_buffer(card, &woinst->voice[voicenum].mem, woinst->buffer.pages) < 0) {
+			ERROR();
+			emu10k1_waveout_close(wave_dev);
+			return -1;
+		}
+
+		if (get_voice(card, woinst, voicenum) < 0) {
+			ERROR();
+			emu10k1_waveout_close(wave_dev);
+			return -1;
+		}
+	}
+
+	buffer->fill_silence = 0;
+	buffer->silence_bytes = 0;
+	buffer->silence_pos = 0;
+	buffer->hw_pos = 0;
+	buffer->free_bytes = woinst->buffer.size;
+
+	delay = (48000 * woinst->buffer.fragment_size) /
+		 (woinst->format.samplingrate * woinst->format.bytespervoicesample);
+
+	emu10k1_timer_install(card, &woinst->timer, delay);
+
+	woinst->state = WAVE_STATE_OPEN;
+
+	return 0;
+}
+
+void emu10k1_waveout_close(struct emu10k1_wavedevice *wave_dev)
+{
+	struct emu10k1_card *card = wave_dev->card;
+	struct woinst *woinst = wave_dev->woinst;
+	unsigned int voicenum;
+
+	DPF(2, "emu10k1_waveout_close()\n");
+
+	emu10k1_waveout_stop(wave_dev);
+
+	emu10k1_timer_uninstall(card, &woinst->timer);
+
+	for (voicenum = 0; voicenum < woinst->num_voices; voicenum++) {
+		emu10k1_voice_free(&woinst->voice[voicenum]);
+		emu10k1_voice_free_buffer(card, &woinst->voice[voicenum].mem);
+	}
+
+	woinst->state = WAVE_STATE_CLOSED;
+}
+
+void emu10k1_waveout_start(struct emu10k1_wavedevice *wave_dev)
+{
+	struct emu10k1_card *card = wave_dev->card;
+	struct woinst *woinst = wave_dev->woinst;
+	struct pt_data *pt = &card->pt;
+
+	DPF(2, "emu10k1_waveout_start()\n");
+
+	if (woinst->format.passthrough == 2) {
+		emu10k1_pt_setup(wave_dev);
+		sblive_writeptr(card, (card->is_audigy ? A_GPR_BASE : GPR_BASE) + pt->enable_gpr, 0, 1);
+		pt->state = PT_STATE_PLAYING;
+	}
+
+	/* Actual start */
+	emu10k1_voices_start(woinst->voice, woinst->num_voices, woinst->total_played);
+
+	emu10k1_timer_enable(card, &woinst->timer);
+
+	woinst->state |= WAVE_STATE_STARTED;
+}
+
+int emu10k1_waveout_setformat(struct emu10k1_wavedevice *wave_dev, struct wave_format *format)
+{
+	struct emu10k1_card *card = wave_dev->card;
+	struct woinst *woinst = wave_dev->woinst;
+	unsigned int voicenum;
+	u16 delay;
+
+	DPF(2, "emu10k1_waveout_setformat()\n");
+
+	if (woinst->state & WAVE_STATE_STARTED)
+		return -1;
+
+	query_format(wave_dev, format);
+
+	if (woinst->format.samplingrate != format->samplingrate ||
+	    woinst->format.channels != format->channels ||
+	    woinst->format.bitsperchannel != format->bitsperchannel) {
+
+		woinst->format = *format;
+
+		if (woinst->state == WAVE_STATE_CLOSED)
+			return 0;
+
+		emu10k1_timer_uninstall(card, &woinst->timer);
+
+		for (voicenum = 0; voicenum < woinst->num_voices; voicenum++) {
+			emu10k1_voice_free(&woinst->voice[voicenum]);
+
+			if (get_voice(card, woinst, voicenum) < 0) {
+				ERROR();
+				emu10k1_waveout_close(wave_dev);
+				return -1;
+			}
+		}
+
+		delay = (48000 * woinst->buffer.fragment_size) /
+			 (woinst->format.samplingrate * woinst->format.bytespervoicesample);
+
+		emu10k1_timer_install(card, &woinst->timer, delay);
+	}
+
+	return 0;
+}
+
+void emu10k1_waveout_stop(struct emu10k1_wavedevice *wave_dev)
+{
+	struct emu10k1_card *card = wave_dev->card;
+	struct woinst *woinst = wave_dev->woinst;
+
+	DPF(2, "emu10k1_waveout_stop()\n");
+
+	if (!(woinst->state & WAVE_STATE_STARTED))
+		return;
+
+	emu10k1_timer_disable(card, &woinst->timer);
+
+	/* Stop actual voices */
+	emu10k1_voices_stop(woinst->voice, woinst->num_voices);
+
+	emu10k1_waveout_update(woinst);
+
+	woinst->state &= ~WAVE_STATE_STARTED;
+}
+
+/**
+ * emu10k1_waveout_getxfersize -
+ *
+ * gives the total free bytes on the voice buffer, including silence bytes
+ * (basically: total_free_bytes = free_bytes + silence_bytes).
+ *
+ */
+void emu10k1_waveout_getxfersize(struct woinst *woinst, u32 *total_free_bytes)
+{
+	struct waveout_buffer *buffer = &woinst->buffer;
+	int pending_bytes;
+
+	if (woinst->mmapped) {
+		*total_free_bytes = buffer->free_bytes;
+		return;
+	}
+
+	pending_bytes = buffer->size - buffer->free_bytes;
+
+	buffer->fill_silence = (pending_bytes < (signed) buffer->fragment_size * 2) ? 1 : 0;
+
+	if (pending_bytes > (signed) buffer->silence_bytes) {
+		*total_free_bytes = (buffer->free_bytes + buffer->silence_bytes);
+	} else {
+		*total_free_bytes = buffer->size;
+		buffer->silence_bytes = pending_bytes;
+		if (pending_bytes < 0) {
+			buffer->silence_pos = buffer->hw_pos;
+			buffer->silence_bytes = 0;
+			buffer->free_bytes = buffer->size;
+			DPF(1, "buffer underrun\n");
+		}
+	}
+}
+
+/**
+ * copy_block -
+ *
+ * copies a block of pcm data to a voice buffer.
+ * Notice that the voice buffer is actually a set of disjointed memory pages.
+ *
+ */
+static void copy_block(void **dst, u32 str, u8 __user *src, u32 len)
+{
+	unsigned int pg;
+	unsigned int pgoff;
+	unsigned int k;
+
+	pg = str / PAGE_SIZE;
+	pgoff = str % PAGE_SIZE;
+
+	if (len > PAGE_SIZE - pgoff) {
+		k = PAGE_SIZE - pgoff;
+		if (__copy_from_user((u8 *)dst[pg] + pgoff, src, k))
+			return;
+		len -= k;
+		while (len > PAGE_SIZE) {
+			if (__copy_from_user(dst[++pg], src + k, PAGE_SIZE))
+				return;
+			k += PAGE_SIZE;
+			len -= PAGE_SIZE;
+		}
+		if (__copy_from_user(dst[++pg], src + k, len))
+			return;
+
+	} else
+		__copy_from_user((u8 *)dst[pg] + pgoff, src, len);
+}
+
+/**
+ * copy_ilv_block -
+ *
+ * copies a block of pcm data containing n interleaved channels to n mono voice buffers.
+ * Notice that the voice buffer is actually a set of disjointed memory pages.
+ *
+ */
+static void copy_ilv_block(struct woinst *woinst, u32 str, u8 __user *src, u32 len) 
+{
+        unsigned int pg;
+	unsigned int pgoff;
+	unsigned int voice_num;
+	struct emu_voice *voice = woinst->voice;
+
+	pg = str / PAGE_SIZE;
+	pgoff = str % PAGE_SIZE;
+
+	while (len) { 
+		for (voice_num = 0; voice_num < woinst->num_voices; voice_num++) {
+			if (__copy_from_user((u8 *)(voice[voice_num].mem.addr[pg]) + pgoff, src, woinst->format.bytespervoicesample))
+				return;
+			src += woinst->format.bytespervoicesample;
+		}
+
+		len -= woinst->format.bytespervoicesample;
+
+		pgoff += woinst->format.bytespervoicesample;
+		if (pgoff >= PAGE_SIZE) {
+			pgoff = 0;
+			pg++;
+		}
+	}
+}
+
+/**
+ * fill_block -
+ *
+ * fills a set voice buffers with a block of a given sample.
+ *
+ */
+static void fill_block(struct woinst *woinst, u32 str, u8 data, u32 len)
+{
+	unsigned int pg;
+	unsigned int pgoff;
+	unsigned int voice_num;
+        struct emu_voice *voice = woinst->voice;
+	unsigned int  k;
+
+	pg = str / PAGE_SIZE;
+	pgoff = str % PAGE_SIZE;
+
+	if (len > PAGE_SIZE - pgoff) {
+		k = PAGE_SIZE - pgoff;
+		for (voice_num = 0; voice_num < woinst->num_voices; voice_num++)
+			memset((u8 *)voice[voice_num].mem.addr[pg] + pgoff, data, k);
+		len -= k;
+		while (len > PAGE_SIZE) {
+			pg++;
+			for (voice_num = 0; voice_num < woinst->num_voices; voice_num++)
+				memset(voice[voice_num].mem.addr[pg], data, PAGE_SIZE);
+
+			len -= PAGE_SIZE;
+		}
+		pg++;
+		for (voice_num = 0; voice_num < woinst->num_voices; voice_num++)
+			memset(voice[voice_num].mem.addr[pg], data, len);
+
+	} else {
+		for (voice_num = 0; voice_num < woinst->num_voices; voice_num++)
+			memset((u8 *)voice[voice_num].mem.addr[pg] + pgoff, data, len);
+	}
+}
+
+/**
+ * emu10k1_waveout_xferdata -
+ *
+ * copies pcm data to the voice buffer. Silence samples
+ * previously added to the buffer are overwritten.
+ *
+ */
+void emu10k1_waveout_xferdata(struct woinst *woinst, u8 __user *data, u32 *size)
+{
+	struct waveout_buffer *buffer = &woinst->buffer;
+	struct voice_mem *mem = &woinst->voice[0].mem;
+	u32 sizetocopy, sizetocopy_now, start;
+	unsigned long flags;
+
+	sizetocopy = min_t(u32, buffer->size, *size);
+	*size = sizetocopy;
+
+	if (!sizetocopy)
+		return;
+	
+	spin_lock_irqsave(&woinst->lock, flags);
+	start = (buffer->size + buffer->silence_pos - buffer->silence_bytes) % buffer->size;
+
+	if (sizetocopy > buffer->silence_bytes) {
+		buffer->silence_pos += sizetocopy - buffer->silence_bytes;
+		buffer->free_bytes -= sizetocopy - buffer->silence_bytes;
+		buffer->silence_bytes = 0;
+	} else
+		buffer->silence_bytes -= sizetocopy;
+
+	spin_unlock_irqrestore(&woinst->lock, flags);
+
+	sizetocopy_now = buffer->size - start;
+	if (sizetocopy > sizetocopy_now) {
+		sizetocopy -= sizetocopy_now;
+		if (woinst->num_voices > 1) {
+			copy_ilv_block(woinst, start, data, sizetocopy_now);
+			copy_ilv_block(woinst, 0, data + sizetocopy_now * woinst->num_voices, sizetocopy);
+		} else {
+			copy_block(mem->addr, start, data, sizetocopy_now);
+			copy_block(mem->addr, 0, data + sizetocopy_now, sizetocopy);
+		}
+	} else {
+		if (woinst->num_voices > 1)
+			copy_ilv_block(woinst, start, data, sizetocopy);
+		else
+			copy_block(mem->addr, start, data, sizetocopy);
+	}
+}
+
+/**
+ * emu10k1_waveout_fillsilence -
+ *
+ * adds samples of silence to the voice buffer so that we
+ * don't loop over stale pcm data.
+ *
+ */
+void emu10k1_waveout_fillsilence(struct woinst *woinst)
+{
+	struct waveout_buffer *buffer = &woinst->buffer;
+	u32 sizetocopy, sizetocopy_now, start;
+	u8 filldata;
+	unsigned long flags;
+
+	sizetocopy = buffer->fragment_size;
+
+	if (woinst->format.bitsperchannel == 16)
+		filldata = 0x00;
+	else
+		filldata = 0x80;
+
+	spin_lock_irqsave(&woinst->lock, flags);
+	buffer->silence_bytes += sizetocopy;
+	buffer->free_bytes -= sizetocopy;
+	buffer->silence_pos %= buffer->size;
+	start = buffer->silence_pos;
+	buffer->silence_pos += sizetocopy;
+	spin_unlock_irqrestore(&woinst->lock, flags);
+
+	sizetocopy_now = buffer->size - start;
+
+	if (sizetocopy > sizetocopy_now) {
+		sizetocopy -= sizetocopy_now;
+		fill_block(woinst, start, filldata, sizetocopy_now);
+		fill_block(woinst, 0, filldata, sizetocopy);
+	} else {
+		fill_block(woinst, start, filldata, sizetocopy);
+	}
+}
+
+/**
+ * emu10k1_waveout_update -
+ *
+ * updates the position of the voice buffer hardware pointer (hw_pos)
+ * and the number of free bytes on the buffer (free_bytes).
+ * The free bytes _don't_ include silence bytes that may have been
+ * added to the buffer.
+ *
+ */
+void emu10k1_waveout_update(struct woinst *woinst)
+{
+	u32 hw_pos;
+	u32 diff;
+
+	/* There is no actual start yet */
+	if (!(woinst->state & WAVE_STATE_STARTED)) {
+		hw_pos = woinst->buffer.hw_pos;
+	} else {
+		/* hw_pos in sample units */
+		hw_pos = sblive_readptr(woinst->voice[0].card, CCCA_CURRADDR, woinst->voice[0].num);
+
+		if(hw_pos < woinst->voice[0].start)
+			hw_pos += woinst->buffer.size / woinst->format.bytespervoicesample - woinst->voice[0].start;
+		else
+			hw_pos -= woinst->voice[0].start;
+
+		hw_pos *= woinst->format.bytespervoicesample;
+	}
+
+	diff = (woinst->buffer.size + hw_pos - woinst->buffer.hw_pos) % woinst->buffer.size;
+	woinst->total_played += diff;
+	woinst->buffer.free_bytes += diff;
+	woinst->buffer.hw_pos = hw_pos;
+}