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| author | Takashi Iwai <tiwai@suse.de> | 2015-01-28 11:29:05 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-01-28 19:50:54 (GMT) |
| commit | 0416980d0a2bc10acff1c2329159577036e5666b (patch) | |
| tree | 0344dfb49f4d4480c5b2d201af5267df0eaa4370 /sound/usb/line6/playback.c | |
| parent | 247d95ee6dd22e5323ecf7a73ff64110ef2fa2da (diff) | |
| download | linux-0416980d0a2bc10acff1c2329159577036e5666b.tar.xz | |
ALSA: line6: Fix volume calculation for big-endian
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/line6/playback.c')
| -rw-r--r-- | sound/usb/line6/playback.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/sound/usb/line6/playback.c b/sound/usb/line6/playback.c index 1708c05..ae41124 100644 --- a/sound/usb/line6/playback.c +++ b/sound/usb/line6/playback.c @@ -31,14 +31,16 @@ static void change_volume(struct urb *urb_out, int volume[], return; /* maximum volume - no change */ if (bytes_per_frame == 4) { - short *p, *buf_end; + __le16 *p, *buf_end; - p = (short *)urb_out->transfer_buffer; + p = (__le16 *)urb_out->transfer_buffer; buf_end = p + urb_out->transfer_buffer_length / sizeof(*p); for (; p < buf_end; ++p) { - int val = (*p * volume[chn & 1]) >> 8; - *p = clamp(val, 0x7fff, -0x8000); + short pv = le16_to_cpu(*p); + int val = (pv * volume[chn & 1]) >> 8; + pv = clamp(val, 0x7fff, -0x8000); + *p = cpu_to_le16(pv); ++chn; } } else if (bytes_per_frame == 6) { @@ -114,15 +116,18 @@ static void add_monitor_signal(struct urb *urb_out, unsigned char *signal, return; /* zero volume - no change */ if (bytes_per_frame == 4) { - short *pi, *po, *buf_end; + __le16 *pi, *po, *buf_end; - pi = (short *)signal; - po = (short *)urb_out->transfer_buffer; + pi = (__le16 *)signal; + po = (__le16 *)urb_out->transfer_buffer; buf_end = po + urb_out->transfer_buffer_length / sizeof(*po); for (; po < buf_end; ++pi, ++po) { - int val = *po + ((*pi * volume) >> 8); - *po = clamp(val, 0x7fff, -0x8000); + short pov = le16_to_cpu(*po); + short piv = le16_to_cpu(*pi); + int val = pov + ((piv * volume) >> 8); + pov = clamp(val, 0x7fff, -0x8000); + *po = cpu_to_le16(pov); } } |