- don't access nonexistent converter goups

- don't try to create formats for converter groups that don't exist
- don't allow playback or recording if there is no corresponding
converter group
- don't try to set audio processing parameters on converter groups
that don't exist

allows playback (or record) only devices to work, such as the
azalias found on ATI graphics devices.

note, the ATI devices generally attach before the onboard devices
do.  that means they will be audio0 and onboard devices will be audio1.
don't forget to make sure the /dev/{audio[ctl],mixer,sound} links
point to the nodes of the device you want to be the default.

tested by naddy@, thanks

1 files changed, 101 insertions, 65 deletions

diff --git a/sys/dev/pci/azalia.c b/sys/dev/pci/azalia.c
index 6e41212dd58..ea394c3c57c 100644
--- a/sys/dev/pci/azalia.c
+++ b/sys/dev/pci/azalia.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: azalia.c,v 1.76 2008/11/28 21:33:26 jakemsr Exp $	*/
+/*	$OpenBSD: azalia.c,v 1.77 2008/11/30 03:50:29 jakemsr Exp $	*/
 /*	$NetBSD: azalia.c,v 1.20 2006/05/07 08:31:44 kent Exp $	*/
 
 /*-
@@ -1306,9 +1306,6 @@ azalia_codec_init(codec_t *this)
 	}
 #endif
 
-	/* set invalid values for azalia_codec_construct_format() to work */
-	this->dacs.cur = -1;
-	this->adcs.cur = -1;
 	err = azalia_codec_construct_format(this, 0, 0);
 	if (err)
 		return err;
@@ -1345,47 +1342,60 @@ azalia_codec_construct_format(codec_t *this, int newdac, int newadc)
 	int nbits, c, chan, i, err;
 	nid_t nid;
 
-	this->dacs.cur = newdac;
-	group = &this->dacs.groups[this->dacs.cur];
-	bits_rates = this->w[group->conv[0]].d.audio.bits_rates;
-	nbits = 0;
-	if (bits_rates & COP_PCM_B8)
-		nbits++;
-	if (bits_rates & COP_PCM_B16)
-		nbits++;
-	if (bits_rates & COP_PCM_B20)
-		nbits++;
-	if (bits_rates & COP_PCM_B24)
-		nbits++;
-	if (bits_rates & COP_PCM_B32)
-		nbits++;
-	if (nbits == 0) {
-		printf("%s: invalid DAC PCM format: 0x%8.8x\n",
-		    XNAME(this->az), bits_rates);
-		return -1;
+	variation = 0;
+
+	if (this->dacs.ngroups > 0 && newdac < this->dacs.ngroups &&
+	    newdac >= 0) {
+		this->dacs.cur = newdac;
+		group = &this->dacs.groups[this->dacs.cur];
+		bits_rates = this->w[group->conv[0]].d.audio.bits_rates;
+		nbits = 0;
+		if (bits_rates & COP_PCM_B8)
+			nbits++;
+		if (bits_rates & COP_PCM_B16)
+			nbits++;
+		if (bits_rates & COP_PCM_B20)
+			nbits++;
+		if (bits_rates & COP_PCM_B24)
+			nbits++;
+		if (bits_rates & COP_PCM_B32)
+			nbits++;
+		if (nbits == 0) {
+			printf("%s: invalid DAC PCM format: 0x%8.8x\n",
+			    XNAME(this->az), bits_rates);
+			return -1;
+		}
+		variation += group->nconv * nbits;
 	}
-	variation = group->nconv * nbits;
 
-	this->adcs.cur = newadc;
-	group = &this->adcs.groups[this->adcs.cur];
-	bits_rates = this->w[group->conv[0]].d.audio.bits_rates;
-	nbits = 0;
-	if (bits_rates & COP_PCM_B8)
-		nbits++;
-	if (bits_rates & COP_PCM_B16)
-		nbits++;
-	if (bits_rates & COP_PCM_B20)
-		nbits++;
-	if (bits_rates & COP_PCM_B24)
-		nbits++;
-	if (bits_rates & COP_PCM_B32)
-		nbits++;
-	if (nbits == 0) {
-		printf("%s: invalid ADC PCM format: 0x%8.8x\n",
-		    XNAME(this->az), bits_rates);
+	if (this->adcs.ngroups > 0 && newadc < this->adcs.ngroups &&
+	    newadc >= 0) {
+		this->adcs.cur = newadc;
+		group = &this->adcs.groups[this->adcs.cur];
+		bits_rates = this->w[group->conv[0]].d.audio.bits_rates;
+		nbits = 0;
+		if (bits_rates & COP_PCM_B8)
+			nbits++;
+		if (bits_rates & COP_PCM_B16)
+			nbits++;
+		if (bits_rates & COP_PCM_B20)
+			nbits++;
+		if (bits_rates & COP_PCM_B24)
+			nbits++;
+		if (bits_rates & COP_PCM_B32)
+			nbits++;
+		if (nbits == 0) {
+			printf("%s: invalid ADC PCM format: 0x%8.8x\n",
+			    XNAME(this->az), bits_rates);
+			return -1;
+		}
+		variation += group->nconv * nbits;
+	}
+
+	if (variation == 0) {
+		DPRINTF(("%s: no converter groups\n", XNAME(this->az)));
 		return -1;
 	}
-	variation += group->nconv * nbits;
 
 	if (this->formats != NULL)
 		free(this->formats, M_DEVBUF);
@@ -1399,29 +1409,35 @@ azalia_codec_construct_format(codec_t *this, int newdac, int newadc)
 	}
 
 	/* register formats for playback */
-	group = &this->dacs.groups[this->dacs.cur];
-	for (c = 0; c < group->nconv; c++) {
-		chan = 0;
-		bits_rates = ~0;
-		for (i = 0; i <= c; i++) {
-			nid = group->conv[i];
-			chan += WIDGET_CHANNELS(&this->w[nid]);
-			bits_rates &= this->w[nid].d.audio.bits_rates;
+	if (this->dacs.ngroups > 0) {
+		group = &this->dacs.groups[this->dacs.cur];
+		for (c = 0; c < group->nconv; c++) {
+			chan = 0;
+			bits_rates = ~0;
+			for (i = 0; i <= c; i++) {
+				nid = group->conv[i];
+				chan += WIDGET_CHANNELS(&this->w[nid]);
+				bits_rates &= this->w[nid].d.audio.bits_rates;
+			}
+			azalia_codec_add_bits(this, chan, bits_rates,
+			    AUMODE_PLAY);
 		}
-		azalia_codec_add_bits(this, chan, bits_rates, AUMODE_PLAY);
 	}
 
 	/* register formats for recording */
-	group = &this->adcs.groups[this->adcs.cur];
-	for (c = 0; c < group->nconv; c++) {
-		chan = 0;
-		bits_rates = ~0;
-		for (i = 0; i <= c; i++) {
-			nid = group->conv[i];
-			chan += WIDGET_CHANNELS(&this->w[nid]);
-			bits_rates &= this->w[nid].d.audio.bits_rates;
+	if (this->adcs.ngroups > 0) {
+		group = &this->adcs.groups[this->adcs.cur];
+		for (c = 0; c < group->nconv; c++) {
+			chan = 0;
+			bits_rates = ~0;
+			for (i = 0; i <= c; i++) {
+				nid = group->conv[i];
+				chan += WIDGET_CHANNELS(&this->w[nid]);
+				bits_rates &= this->w[nid].d.audio.bits_rates;
+			}
+			azalia_codec_add_bits(this, chan, bits_rates,
+			    AUMODE_RECORD);
 		}
-		azalia_codec_add_bits(this, chan, bits_rates, AUMODE_RECORD);
 	}
 
 	err = azalia_create_encodings(this);
@@ -2312,6 +2328,12 @@ azalia_set_params_sub(codec_t *codec, int mode, audio_params_t *par)
 	oenc = par->encoding;
 	opre = par->precision;
 
+	if ((mode == AUMODE_PLAY && codec->dacs.ngroups == 0) ||
+	    (mode == AUMODE_RECORD && codec->adcs.ngroups == 0)) {
+		azalia_get_default_params(NULL, mode, par);
+		return 0;
+	}
+
 	i = azalia_match_format(codec, mode, par);
 	if (i == codec->nformats && par->channels == 1) {
 		/* find a 2 channel format and emulate mono */
@@ -2585,12 +2607,19 @@ azalia_trigger_output(void *v, void *start, void *end, int blk,
 	int err;
 	uint16_t fmt;
 
+	az = v;
+
+	if (az->codecs[az->codecno].dacs.ngroups == 0) {
+		DPRINTF(("%s: can't play without a DAC\n", __func__));
+		return ENXIO;
+	}
+
 	err = azalia_params2fmt(param, &fmt);
 	if (err)
 		return EINVAL;
 
-	az = v;
-	return azalia_stream_start(&az->pstream, start, end, blk, intr, arg, fmt);
+	return azalia_stream_start(&az->pstream, start, end, blk, intr,
+	    arg, fmt);
 }
 
 int
@@ -2601,16 +2630,23 @@ azalia_trigger_input(void *v, void *start, void *end, int blk,
 	int err;
 	uint16_t fmt;
 
-	DPRINTFN(1, ("%s: this=%p start=%p end=%p blk=%d {enc=%u %uch %u/%ubit %uHz}\n",
+	DPRINTFN(1, ("%s: this=%p start=%p end=%p blk=%d {enc=%u %uch %ubit %uHz}\n",
 	    __func__, v, start, end, blk, param->encoding, param->channels,
-	    param->precision, param->precision, param->sample_rate));
+	    param->precision, param->sample_rate));
+
+	az = v;
+
+	if (az->codecs[az->codecno].adcs.ngroups == 0) {
+		DPRINTF(("%s: can't record without an ADC\n", __func__));
+		return ENXIO;
+	}
 
 	err = azalia_params2fmt(param, &fmt);
 	if (err)
 		return EINVAL;
 
-	az = v;
-	return azalia_stream_start(&az->rstream, start, end, blk, intr, arg, fmt);
+	return azalia_stream_start(&az->rstream, start, end, blk, intr,
+	    arg, fmt);
 }
 
 /* --------------------------------