AC3 passthrough on Audigy

AC3 passthrough on Audigy

[Boris Shingarov]

Peter,

This is very interesting.  You mean this patch will enable passthrough
without the need for ld10k1, right?  I will give it a try and let you
know what my results are.

Boris



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Re: AC3 passthrough on Audigy

[James Courtier-Dutton]

Boris Shingarov wrote:
> Peter,
> 
> This is very interesting.  You mean this patch will enable passthrough
> without the need for ld10k1, right?  I will give it a try and let you
> know what my results are.
> 
> Boris
> 
> 
It does passthrough using a standard PCM channel. No special TRAM tricks 
needed.
Only works if you send it 2 channel, 16 bit, 48khz PCM stream.
and then outputs AC3 at 48khz over SPDIF.

Cheers
James



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AC3 passthrough on Audigy

[p z oooo]

[-- Attachment #1: Type: TEXT/plain, Size: 978 bytes --]

Hi,

This is taken from oss driver. It is not tested (I don't own 
receiver). Can someone try it, maybe this works, I don't know.

Audigy.conf - copy this to /usr/share/alsa/cards/ and overwrite old 
one (make backup).

emu10k1.h.patch - patch for file alsa-driver/alsa-
kernel/include/emu10k1.h

emufx.c.patch - patch for file alsa-driver/alsa-
kernel/pci/emu10k1/emufx.c

If this doesn't work try to comment out lines
A_OP(icode, &ptr, iSKIP, A_GPR_COND, A_GPR_COND, A_GPR(gpr - 2), 
A_C_00000001);
A_OP(icode, &ptr, iACC3, A_GPR(tmp + 2), A_C_00000000, A_C_00010000, 
A_GPR(tmp + 2));

And if this doesn't work too, then delete this mail.

Peter Zubaj

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================================================================

[-- Attachment #2: C:\pt\Audigy.conf --]
[-- Type: APPLICATION/octet-stream, Size: 3525 bytes --]

#
# Configuration for the Audigy chip
#

<confdir:pcm/front.conf>

Audigy.pcm.front.0 {
	@args [ CARD  ]
	@args.CARD {
		type string
	}
	type hw
	card $CARD
	device 0
}	

<confdir:pcm/rear.conf>

Audigy.pcm.rear.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type hooks
	slave.pcm {
		type hw
		card $CARD
		device 0
	}
	hooks.0 {
		type ctl_elems
		hook_args [
			{
				name "Wave Surround Playback Volume"
				preserve true
				lock true
				value [ 0 0 ]
			}
			{
				name "EMU10K1 PCM Send Volume"
				index { @func private_pcm_subdevice }
				lock true
				value [ 0 0 0 0 0 0 0 0  0 0 255 0 0 0 0 0  0 0 0 255 0 0 0 0 ]
			}
		]
	}
}	

<confdir:pcm/center_lfe.conf>

Audigy.pcm.center_lfe.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type hooks
	slave.pcm {
		type hw
		card $CARD
		device 0
	}
	hooks.0 {
		type ctl_elems
		hook_args [
			{
				name "Wave Center Playback Volume"
				preserve true
				lock true
				value 0
			}
			{
				name "Wave LFE Playback Volume"
				preserve true
				lock true
				value 0
			}
			{
				name "EMU10K1 PCM Send Volume"
				index { @func private_pcm_subdevice }
				lock true
				value [ 0 0 0 0 0 0 0 0  255 0 0 0 0 0 0 0  0 255 0 0 0 0 0 0 ]
			}
			{
				name "EMU10K1 PCM Send Routing"
				index { @func private_pcm_subdevice }
				lock true
				value [ 0 1 2 3 0 0 0 0  6 7 0 1 0 0 0 0  6 7 0 1 0 0 0 0 ]
			}
		]
	}
}	

<confdir:pcm/surround40.conf>

Audigy.pcm.surround40.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type multi
	slaves [
		{
			pcm {
				@func concat
				strings [
					"cards.Audigy.pcm.front.0:CARD=" $CARD
				]
			}
			channels 2
		}
		{
			pcm {
				@func concat
				strings [
					"cards.Audigy.pcm.rear.0:CARD=" $CARD
				]
			}
			channels 2
		}
	]
	bindings [
		{ slave 0 channel 0 }
		{ slave 0 channel 1 }
		{ slave 1 channel 0 }
		{ slave 1 channel 1 }
	]
}

<confdir:pcm/surround51.conf>

Audigy.pcm.surround51.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type multi
	slaves [
		{
			pcm {
				@func concat
				strings [
					"cards.Audigy.pcm.front.0:CARD=" $CARD
				]
			}
			channels 2
		}
		{
			pcm {
				@func concat
				strings [
					"cards.Audigy.pcm.rear.0:CARD=" $CARD
				]
			}
			channels 2
		}
		{
			pcm {
				@func concat
				strings [
					"cards.Audigy.pcm.center_lfe.0:CARD=" $CARD
				]
			}
			channels 2
		}
	]
	bindings [
		{ slave 0 channel 0 }
		{ slave 0 channel 1 }
		{ slave 1 channel 0 }
		{ slave 1 channel 1 }
		{ slave 2 channel 0 }
		{ slave 2 channel 1 }
	]
}

<confdir:pcm/iec958.conf>

Audigy.pcm.iec958.0 {
	@args [ CARD AES0 AES1 AES2 AES3 ]
	@args.CARD {
		type string
	}
	@args.AES0 {
		type integer
	}
	@args.AES1 {
		type integer
	}
	@args.AES2 {
		type integer
	}
	@args.AES3 {
		type integer
	}
	type hooks
	slave.pcm {
		type hw
		card $CARD
		device 0
	}

	hooks.0 {
		type ctl_elems
		hook_args [
			{
				name "IEC958 Playback Default"
				lock true
				preserve true
				value [ $AES0 $AES1 $AES2 $AES3 ]
			}
			{
				name "IEC958 Optical Raw Playback Switch"
				lock true
				preserve true
				value [ 1 1 ]
			}
			{
				name "EMU10K1 PCM Send Volume"
				index { @func private_pcm_subdevice }
				lock true
				value [ 0 0 0 0 0 0 0 0  255 0 0 0 0 0 0 0  0 255 0 0 0 0 0 0 ]
			}
			{
				name "EMU10K1 PCM Send Routing"
				index { @func private_pcm_subdevice }
				lock true
				value [ 0 1 2 3 0 0 0 0  20 21 0 1 0 0 0 0   20 21 0 1 0 0 0 0 ]
			}
			{
				name "Audigy Analog/Digital Output Jack"
				lock true
				preserve true
				value 1
			}
		]
	}
}

[-- Attachment #3: C:\pt\emu10k1.h.patch --]
[-- Type: APPLICATION/octet-stream, Size: 338 bytes --]

--- emu10k1.h.old	2003-07-25 12:37:39.000000000 +0200
+++ emu10k1.h	2003-08-25 21:15:46.000000000 +0200
@@ -1152,6 +1152,8 @@
 #define FXBUS_MIDI_RIGHT	0x05
 #define FXBUS_PCM_CENTER	0x06
 #define FXBUS_PCM_LFE		0x07
+#define FXBUS_PT_LEFT		20
+#define FXBUS_PT_RIGHT		21
 #define FXBUS_MIDI_REVERB	0x0c
 #define FXBUS_MIDI_CHORUS	0x0d
 

[-- Attachment #4: C:\pt\emufx.c.patch --]
[-- Type: APPLICATION/octet-stream, Size: 2571 bytes --]

--- emufx.c.old	2003-07-25 12:39:38.000000000 +0200
+++ emufx.c	2003-08-25 22:19:02.000000000 +0200
@@ -1235,6 +1235,7 @@
  */
 
 #define A_GPR_ACCU 0xd6
+#define A_GPR_COND 0xd7
 
 static int __devinit _snd_emu10k1_audigy_init_efx(emu10k1_t *emu)
 {
@@ -1502,13 +1503,7 @@
 		A_OP(icode, &ptr, iMAC0, A_GPR(playback+1+SND_EMU10K1_PLAYBACK_CHANNELS), A_C_00000000, A_GPR(gpr+1), A_GPR(playback+1+SND_EMU10K1_PLAYBACK_CHANNELS));
 		snd_emu10k1_init_stereo_control(&controls[nctl++], "Wave Master Playback Volume", gpr, 0);
 		gpr += 2;
-	}
-
-	/* digital outputs */
-	A_PUT_STEREO_OUTPUT(A_EXTOUT_FRONT_L, A_EXTOUT_FRONT_R, playback + SND_EMU10K1_PLAYBACK_CHANNELS);
-	A_PUT_STEREO_OUTPUT(A_EXTOUT_REAR_L, A_EXTOUT_REAR_R, playback+2 + SND_EMU10K1_PLAYBACK_CHANNELS);
-	A_PUT_OUTPUT(A_EXTOUT_CENTER, playback+4 + SND_EMU10K1_PLAYBACK_CHANNELS);
-	A_PUT_OUTPUT(A_EXTOUT_LFE, playback+5 + SND_EMU10K1_PLAYBACK_CHANNELS);
+	}	
 
 	/* analog speakers */
 	if (emu->revision == 4) { /* audigy2 */
@@ -1523,6 +1518,29 @@
 	/* headphone */
 	A_PUT_STEREO_OUTPUT(A_EXTOUT_HEADPHONE_L, A_EXTOUT_HEADPHONE_R, playback + SND_EMU10K1_PLAYBACK_CHANNELS);
 
+	/* digital outputs */
+//	A_PUT_STEREO_OUTPUT(A_EXTOUT_FRONT_L, A_EXTOUT_FRONT_R, playback + SND_EMU10K1_PLAYBACK_CHANNELS);
+
+	/* IEC958 Optical Raw Playback Switch */ 
+	icode->gpr_map[gpr++] = 0x1008;
+	icode->gpr_map[gpr++] = 0xffff0000;
+	for (z = 0; z < 2; z++) {
+		A_OP(icode, &ptr, iMAC0, A_GPR(tmp + 2), A_FXBUS(FXBUS_PT_LEFT + z), A_C_00000000, A_C_00000000);
+		A_OP(icode, &ptr, iSKIP, A_GPR_COND, A_GPR_COND, A_GPR(gpr - 2), A_C_00000001);
+		A_OP(icode, &ptr, iACC3, A_GPR(tmp + 2), A_C_00000000, A_C_00010000, A_GPR(tmp + 2));
+		A_OP(icode, &ptr, iANDXOR, A_GPR(tmp + 2), A_GPR(tmp + 2), A_GPR(gpr - 1), A_C_00000000);
+		A_SWITCH(icode, &ptr, tmp + 0, tmp + 2, gpr + z);
+		A_SWITCH_NEG(icode, &ptr, tmp + 1, gpr + z);
+		A_SWITCH(icode, &ptr, tmp + 1, playback + SND_EMU10K1_PLAYBACK_CHANNELS + z, tmp + 1);
+		A_OP(icode, &ptr, iACC3, A_EXTOUT(A_EXTOUT_FRONT_L + z), A_GPR(tmp + 0), A_GPR(tmp + 1), A_C_00000000);
+	}
+	snd_emu10k1_init_stereo_onoff_control(controls + nctl++, "IEC958 Optical Raw Playback Switch", gpr, 0);
+	gpr += 2;
+	
+	A_PUT_STEREO_OUTPUT(A_EXTOUT_REAR_L, A_EXTOUT_REAR_R, playback+2 + SND_EMU10K1_PLAYBACK_CHANNELS);
+	A_PUT_OUTPUT(A_EXTOUT_CENTER, playback+4 + SND_EMU10K1_PLAYBACK_CHANNELS);
+	A_PUT_OUTPUT(A_EXTOUT_LFE, playback+5 + SND_EMU10K1_PLAYBACK_CHANNELS);
+
 	/* ADC buffer */
 	A_PUT_OUTPUT(A_EXTOUT_ADC_CAP_L, capture);
 	A_PUT_OUTPUT(A_EXTOUT_ADC_CAP_R, capture+1);

Re: AC3 passthrough on Audigy

[James Courtier-Dutton]

p z oooo wrote:
> Hi,
> 
> This is taken from oss driver. It is not tested (I don't own 
> receiver). Can someone try it, maybe this works, I don't know.
> 
> Audigy.conf - copy this to /usr/share/alsa/cards/ and overwrite old 
> one (make backup).
> 
> emu10k1.h.patch - patch for file alsa-driver/alsa-
> kernel/include/emu10k1.h
> 
> emufx.c.patch - patch for file alsa-driver/alsa-
> kernel/pci/emu10k1/emufx.c
> 
> If this doesn't work try to comment out lines
> A_OP(icode, &ptr, iSKIP, A_GPR_COND, A_GPR_COND, A_GPR(gpr - 2), 
> A_C_00000001);
> A_OP(icode, &ptr, iACC3, A_GPR(tmp + 2), A_C_00000000, A_C_00010000, 
> A_GPR(tmp + 2));
> 
> And if this doesn't work too, then delete this mail.
> 
> Peter Zubaj
> 
Is this just for the Audigy?
Would it work on the Audigy 2 ?
Is so, I have an Audigy 2 that I could install and do a test with.

Cheers
James




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Re: AC3 passthrough on Audigy

[James Courtier-Dutton]

p z oooo wrote:
> Hi,
> 
> This is taken from oss driver. It is not tested (I don't own 
> receiver). Can someone try it, maybe this works, I don't know.
> 
> Audigy.conf - copy this to /usr/share/alsa/cards/ and overwrite old 
> one (make backup).
> 
> emu10k1.h.patch - patch for file alsa-driver/alsa-
> kernel/include/emu10k1.h
> 
> emufx.c.patch - patch for file alsa-driver/alsa-
> kernel/pci/emu10k1/emufx.c
> 
> If this doesn't work try to comment out lines
> A_OP(icode, &ptr, iSKIP, A_GPR_COND, A_GPR_COND, A_GPR(gpr - 2), 
> A_C_00000001);
> A_OP(icode, &ptr, iACC3, A_GPR(tmp + 2), A_C_00000000, A_C_00010000, 
> A_GPR(tmp + 2));
> 
> And if this doesn't work too, then delete this mail.
> 
> Peter Zubaj
> 
I tried this on an Audigy2. It does not work.
The non-audio bits on the SPDIF are set correctly, and Audio data is 
being sent out from the port, so for PCM data it is fine. For non-audio 
AC3 data, it fails. Probably due to the samples getting modified in some 
way as they pass thru the DSP.

Cheers
James




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Re: AC3 passthrough on Audigy

[James Courtier-Dutton]

p z oooo wrote:
> Hi,
> 
> This is taken from oss driver. It is not tested (I don't own 
> receiver). Can someone try it, maybe this works, I don't know.
> 
> Audigy.conf - copy this to /usr/share/alsa/cards/ and overwrite old 
> one (make backup).
> 
> emu10k1.h.patch - patch for file alsa-driver/alsa-
> kernel/include/emu10k1.h
> 
> emufx.c.patch - patch for file alsa-driver/alsa-
> kernel/pci/emu10k1/emufx.c
>

Do NOT comment out the following lines.

> If this doesn't work try to comment out lines
> A_OP(icode, &ptr, iSKIP, A_GPR_COND, A_GPR_COND, A_GPR(gpr - 2), 
> A_C_00000001);
> A_OP(icode, &ptr, iACC3, A_GPR(tmp + 2), A_C_00000000, A_C_00010000, 
> A_GPR(tmp + 2));
> 
> And if this doesn't work too, then delete this mail.
> 
> Peter Zubaj
> 
Your patch works up to a point. It will only work on the Audigy, and not 
the Audigy2.
The Audigy and Audigy2 do things slighly differently.
The L and R channels are reversed on the Audigy2, so I have compensated 
for this by using a different routing in Audigy2.conf.

If you add my patches, this will work with both the Audigy and Audigy2. :-)

emu10k1.c.patch - patch for file 
alsa-driver/alsa-kernel/pci/emu10k1/emu10k1.c  (So that is looks for 
Audigy2.conf)

Audigy2.conf - copy this to /usr/share/alsa/cards/  (It is a new file)

Summary: -
If one combines pzad's patch with my own, we have AC3 passthru working 
on all SB cards. SB Live (Worked before), SB Audigy (with pzas's patch) 
and SB Audigy2 (with my patch).

Please check these into the alsa-kernel cvs.

Cheers
James



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