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path: root/drivers/isdn/mISDN/l1oip_codec.c
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Diffstat (limited to 'drivers/isdn/mISDN/l1oip_codec.c')
-rw-r--r--drivers/isdn/mISDN/l1oip_codec.c36
1 files changed, 17 insertions, 19 deletions
diff --git a/drivers/isdn/mISDN/l1oip_codec.c b/drivers/isdn/mISDN/l1oip_codec.c
index 5a89972624d..a601c847222 100644
--- a/drivers/isdn/mISDN/l1oip_codec.c
+++ b/drivers/isdn/mISDN/l1oip_codec.c
@@ -27,22 +27,22 @@
/*
-How the codec works:
---------------------
+ How the codec works:
+ --------------------
-The volume is increased to increase the dynamic range of the audio signal.
-Each sample is converted to a-LAW with only 16 steps of level resolution.
-A pair of two samples are stored in one byte.
+ The volume is increased to increase the dynamic range of the audio signal.
+ Each sample is converted to a-LAW with only 16 steps of level resolution.
+ A pair of two samples are stored in one byte.
-The first byte is stored in the upper bits, the second byte is stored in the
-lower bits.
+ The first byte is stored in the upper bits, the second byte is stored in the
+ lower bits.
-To speed up compression and decompression, two lookup tables are formed:
+ To speed up compression and decompression, two lookup tables are formed:
-- 16 bits index for two samples (law encoded) with 8 bit compressed result.
-- 8 bits index for one compressed data with 16 bits decompressed result.
+ - 16 bits index for two samples (law encoded) with 8 bit compressed result.
+ - 8 bits index for one compressed data with 16 bits decompressed result.
-NOTE: The bytes are handled as they are law-encoded.
+ NOTE: The bytes are handled as they are law-encoded.
*/
@@ -232,7 +232,7 @@ l1oip_law_to_4bit(u8 *data, int len, u8 *result, u32 *state)
/* send saved byte and first input byte */
if (*state) {
- *result++ = table_com[(((*state)<<8)&0xff00) | (*data++)];
+ *result++ = table_com[(((*state) << 8) & 0xff00) | (*data++)];
len--;
o++;
}
@@ -267,7 +267,7 @@ l1oip_4bit_to_law(u8 *data, int len, u8 *result)
while (i < len) {
r = table_dec[*data++];
- *result++ = r>>8;
+ *result++ = r >> 8;
*result++ = r;
i++;
}
@@ -345,8 +345,8 @@ l1oip_4bit_alloc(int ulaw)
c = alaw_to_4bit[i1];
i2 = 0;
while (i2 < 256) {
- table_com[(i1<<8) | i2] |= (c<<4);
- table_com[(i2<<8) | i1] |= c;
+ table_com[(i1 << 8) | i2] |= (c << 4);
+ table_com[(i2 << 8) | i1] |= c;
i2++;
}
i1++;
@@ -361,8 +361,8 @@ l1oip_4bit_alloc(int ulaw)
sample = _4bit_to_alaw[i1];
i2 = 0;
while (i2 < 16) {
- table_dec[(i1<<4) | i2] |= (sample<<8);
- table_dec[(i2<<4) | i1] |= sample;
+ table_dec[(i1 << 4) | i2] |= (sample << 8);
+ table_dec[(i2 << 4) | i1] |= sample;
i2++;
}
i1++;
@@ -370,5 +370,3 @@ l1oip_4bit_alloc(int ulaw)
return 0;
}
-
-