return 0;
}
-#define BIQUAD_FILTER(name, type, min, max) \
+#define BIQUAD_FILTER(name, type, min, max, need_clipping) \
static void biquad_## name (const void *input, void *output, int len, \
double *in1, double *in2, \
double *out1, double *out2, \
for (i = 0; i+1 < len; i++) { \
o2 = i2 * b2 + i1 * b1 + ibuf[i] * b0 + o2 * a2 + o1 * a1; \
i2 = ibuf[i]; \
- if (o2 < min) { \
+ if (need_clipping && o2 < min) { \
av_log(NULL, AV_LOG_WARNING, "clipping\n"); \
obuf[i] = min; \
- } else if (o2 > max) { \
+ } else if (need_clipping && o2 > max) { \
av_log(NULL, AV_LOG_WARNING, "clipping\n"); \
obuf[i] = max; \
} else { \
i++; \
o1 = i1 * b2 + i2 * b1 + ibuf[i] * b0 + o1 * a2 + o2 * a1; \
i1 = ibuf[i]; \
- if (o1 < min) { \
+ if (need_clipping && o1 < min) { \
av_log(NULL, AV_LOG_WARNING, "clipping\n"); \
obuf[i] = min; \
- } else if (o1 > max) { \
+ } else if (need_clipping && o1 > max) { \
av_log(NULL, AV_LOG_WARNING, "clipping\n"); \
obuf[i] = max; \
} else { \
i1 = ibuf[i]; \
o2 = o1; \
o1 = o0; \
- if (o0 < min) { \
+ if (need_clipping && o0 < min) { \
av_log(NULL, AV_LOG_WARNING, "clipping\n"); \
obuf[i] = min; \
- } else if (o0 > max) { \
+ } else if (need_clipping && o0 > max) { \
av_log(NULL, AV_LOG_WARNING, "clipping\n"); \
obuf[i] = max; \
} else { \
*out2 = o2; \
}
-BIQUAD_FILTER(s16, int16_t, INT16_MIN, INT16_MAX)
-BIQUAD_FILTER(s32, int32_t, INT32_MIN, INT32_MAX)
-BIQUAD_FILTER(flt, float, -1., 1.)
-BIQUAD_FILTER(dbl, double, -1., 1.)
+BIQUAD_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
+BIQUAD_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
+BIQUAD_FILTER(flt, float, -1., 1., 0)
+BIQUAD_FILTER(dbl, double, -1., 1., 0)
static int config_output(AVFilterLink *outlink)
{