#define BIAS (0x84) /* Bias for linear code. */
-/*
- * alaw2linear() - Convert an A-law value to 16-bit linear PCM
- *
- */
+/* alaw2linear() - Convert an A-law value to 16-bit linear PCM */
static av_cold int alaw2linear(unsigned char a_val)
{
int t;
{
int i, j, v, v1, v2;
- j = 0;
- for(i=0;i<128;i++) {
- if (i != 127) {
- v1 = xlaw2linear(i ^ mask);
- v2 = xlaw2linear((i + 1) ^ mask);
- v = (v1 + v2 + 4) >> 3;
- } else {
- v = 8192;
- }
- for(;j<v;j++) {
+ j = 1;
+ linear_to_xlaw[8192] = mask;
+ for(i=0;i<127;i++) {
+ v1 = xlaw2linear(i ^ mask);
+ v2 = xlaw2linear((i + 1) ^ mask);
+ v = (v1 + v2 + 4) >> 3;
+ for(;j<v;j+=1) {
+ linear_to_xlaw[8192 - j] = (i ^ (mask ^ 0x80));
linear_to_xlaw[8192 + j] = (i ^ mask);
- if (j > 0)
- linear_to_xlaw[8192 - j] = (i ^ (mask ^ 0x80));
}
}
+ for(;j<8192;j++) {
+ linear_to_xlaw[8192 - j] = (127 ^ (mask ^ 0x80));
+ linear_to_xlaw[8192 + j] = (127 ^ mask);
+ }
linear_to_xlaw[0] = linear_to_xlaw[1];
}