*/
static void init_loop_filter(Vp3DecodeContext *s)
{
- int *bounding_values = s->bounding_values_array + 127;
- int filter_limit;
- int x;
- int value;
-
- filter_limit = s->filter_limit_values[s->qps[0]];
- av_assert0(filter_limit < 128U);
-
- /* set up the bounding values */
- memset(s->bounding_values_array, 0, 256 * sizeof(int));
- for (x = 0; x < filter_limit; x++) {
- bounding_values[-x] = -x;
- bounding_values[x] = x;
- }
- for (x = value = filter_limit; x < 128 && value; x++, value--) {
- bounding_values[ x] = value;
- bounding_values[-x] = -value;
- }
- if (value)
- bounding_values[128] = value;
- bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
+ ff_vp3dsp_set_bounding_values(s->bounding_values_array, s->filter_limit_values[s->qps[0]]);
}
/*
#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
+#include "libavutil/avassert.h"
#include "avcodec.h"
#include "rnd_avg.h"
if (ARCH_MIPS)
ff_vp3dsp_init_mips(c, flags);
}
+
+/*
+ * This function initializes the loop filter boundary limits if the frame's
+ * quality index is different from the previous frame's.
+ *
+ * where sizeof(bounding_values_array) is 256 * sizeof(int)
+ *
+ * The filter_limit_values may not be larger than 127.
+ */
+void ff_vp3dsp_set_bounding_values(int * bounding_values_array, int filter_limit)
+{
+ int *bounding_values = bounding_values_array + 127;
+ int x;
+ int value;
+
+ av_assert0(filter_limit < 128U);
+
+ /* set up the bounding values */
+ memset(bounding_values_array, 0, 256 * sizeof(int));
+ for (x = 0; x < filter_limit; x++) {
+ bounding_values[-x] = -x;
+ bounding_values[x] = x;
+ }
+ for (x = value = filter_limit; x < 128 && value; x++, value--) {
+ bounding_values[ x] = value;
+ bounding_values[-x] = -value;
+ }
+ if (value)
+ bounding_values[128] = value;
+ bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
+}
void ff_vp3dsp_init_x86(VP3DSPContext *c, int flags);
void ff_vp3dsp_init_mips(VP3DSPContext *c, int flags);
+void ff_vp3dsp_set_bounding_values(int * bound_values_array, int filter_limit);
+
#endif /* AVCODEC_VP3DSP_H */