d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix the order of the stereo channels (left <-> right).

Browse Source 
From the PR:
---snip---
 I think I have found the change which reversed the channels.
 Revision 1.44 of emu10k1.c, which added Audigy support, has the line

 emu_wrptr(sc, v->vnum, FXRT, 0xd01c0000);

 replaced with the following lines:

 if (sc->audigy) {
         emu_wrptr(sc, v->vnum, A_FXRT1, v->fxrt1);
         emu_wrptr(sc, v->vnum, A_FXRT2, v->fxrt2);
         emu_wrptr(sc, v->vnum, A_SENDAMOUNTS, 0);
 }
 else
         emu_wrptr(sc, v->vnum, FXRT, v->fxrt1 << 16);

 where v->fxrt1 << 16 == 0xd10c0000

 I don't have Audigy, so I'm not sure if the problem affects Audigy cards
 too. The order of the channels can't be tested by just altering mixer
 settings. Here's a small program to test if the channels are reversed on
 your sound card:

 #include <sys/soundcard.h>
 #include <fcntl.h>
 #include <unistd.h>

 int main(int argc, char **argv)
 {
 	int fd = open("/dev/dsp", O_WRONLY), format = AFMT_S16_LE;
   int channels = 2, rate = 22050, i;

   /* 450 Hz sine wave on left channel, right channel silent */
   unsigned char samples[] = {0, 0, 0, 0, 94, 16, 0, 0, 120, 32, 0, 0,
     9, 48, 0, 0, 208, 62, 0, 0, 143, 76, 0, 0, 12, 89, 0, 0, 19, 100,
     0, 0, 117, 109, 0, 0, 11, 117, 0, 0, 182, 122, 0, 0, 92, 126, 0,
     0, 239, 127, 0, 0, 105, 127, 0, 0, 202, 124, 0, 0, 32, 120, 0, 0,
     124, 113, 0, 0, 251, 104, 0, 0, 193, 94, 0, 0, 249, 82, 0, 0,
     212, 69, 0, 0, 138, 55, 0, 0, 85, 40, 0, 0, 120, 24, 0, 0, 51, 8,
     0, 0, 205, 247, 0, 0, 136, 231, 0, 0, 171, 215, 0, 0, 118, 200,
     0, 0, 44, 186, 0, 0, 7, 173, 0, 0, 63, 161, 0, 0, 5, 151, 0, 0,
     132, 142, 0, 0, 224, 135, 0, 0, 54, 131, 0, 0, 151, 128, 0, 0,
     17, 128, 0, 0, 164, 129, 0, 0, 74, 133, 0, 0, 245, 138, 0, 0,
     139, 146, 0, 0, 237, 155, 0, 0, 244, 166, 0, 0, 113, 179, 0, 0,
     48, 193, 0, 0, 247, 207, 0, 0, 136, 223, 0, 0, 162, 239, 0, 0};

   ioctl(fd, SNDCTL_DSP_SETFMT,&format);
   ioctl(fd, SNDCTL_DSP_CHANNELS,&channels);
   ioctl(fd, SNDCTL_DSP_SPEED,&rate);

   for(i=0;i<500;i++)
     write(fd, &samples, sizeof(samples));
   write(fd, &samples, 2); /* swap channels */
   for(i=0;i<500;i++)
     write(fd, &samples, sizeof(samples));

   return 0;
 }

 You should hear a sound on the left channel followed by a sound on the
 right channel. If you hear a sound on the right channel first, the
 channels are reversed.
---snip---

Owners of an audigy card should verify if it DTRT and report back.

Noticed by:	Matthias Buelow <mkb@mukappabeta.de>
Submitted by:	Juha-Matti Tilli <juhis@nallukka.net>
PR:		72221
This commit is contained in:
Alexander Leidinger 2005-12-28 17:57:36 +00:00
parent 3f34977614
commit 9190333ce7
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
sys/dev/sound/pci/emu10k1.c
View File

@ -494,12 +494,12 @@ emu_vinit(struct sc_info *sc, struct emu_voice *m, struct emu_voice *s,
m->buf = tmp_addr;
m->slave = s;
if (sc->audigy) {
m->fxrt1 = FXBUS_MIDI_CHORUS | FXBUS_PCM_LEFT << 8 |
FXBUS_PCM_RIGHT << 16 | FXBUS_MIDI_REVERB << 24;
m->fxrt1 = FXBUS_MIDI_CHORUS | FXBUS_PCM_RIGHT << 8 |
FXBUS_PCM_LEFT << 16 | FXBUS_MIDI_REVERB << 24;
m->fxrt2 = 0x3f3f3f3f; /* No effects on second route */
} else {
m->fxrt1 = FXBUS_MIDI_CHORUS | FXBUS_PCM_LEFT << 4 |
FXBUS_PCM_RIGHT << 8 | FXBUS_MIDI_REVERB << 12;
m->fxrt1 = FXBUS_MIDI_CHORUS | FXBUS_PCM_RIGHT << 4 |
FXBUS_PCM_LEFT << 8 | FXBUS_MIDI_REVERB << 12;
m->fxrt2 = 0;
}