/*
* DSP functions for Indeo Video Interactive codecs (Indeo4 and Indeo5)
*
- * Copyright (c) 2009 Maxim Poliakovski
+ * Copyright (c) 2009-2011 Maxim Poliakovski
*
* This file is part of FFmpeg.
*
}
}
+void ff_ivi_recompose_haar(const IVIPlaneDesc *plane, uint8_t *dst,
+ const int dst_pitch, const int num_bands)
+{
+ int x, y, indx, b0, b1, b2, b3, p0, p1, p2, p3;
+ const IDWTELEM *b0_ptr, *b1_ptr, *b2_ptr, *b3_ptr;
+ int32_t pitch;
+
+ /* all bands should have the same pitch */
+ pitch = plane->bands[0].pitch;
+
+ /* get pointers to the wavelet bands */
+ b0_ptr = plane->bands[0].buf;
+ b1_ptr = plane->bands[1].buf;
+ b2_ptr = plane->bands[2].buf;
+ b3_ptr = plane->bands[3].buf;
+
+ for (y = 0; y < plane->height; y += 2) {
+ for (x = 0, indx = 0; x < plane->width; x += 2, indx++) {
+ /* load coefficients */
+ b0 = b0_ptr[indx]; //should be: b0 = (num_bands > 0) ? b0_ptr[indx] : 0;
+ b1 = b1_ptr[indx]; //should be: b1 = (num_bands > 1) ? b1_ptr[indx] : 0;
+ b2 = b2_ptr[indx]; //should be: b2 = (num_bands > 2) ? b2_ptr[indx] : 0;
+ b3 = b3_ptr[indx]; //should be: b3 = (num_bands > 3) ? b3_ptr[indx] : 0;
+
+ /* haar wavelet recomposition */
+ p0 = (b0 + b1 + b2 + b3 + 2) >> 2;
+ p1 = (b0 + b1 - b2 - b3 + 2) >> 2;
+ p2 = (b0 - b1 + b2 - b3 + 2) >> 2;
+ p3 = (b0 - b1 - b2 + b3 + 2) >> 2;
+
+ /* bias, convert and output four pixels */
+ dst[x] = av_clip_uint8(p0 + 128);
+ dst[x + 1] = av_clip_uint8(p1 + 128);
+ dst[dst_pitch + x] = av_clip_uint8(p2 + 128);
+ dst[dst_pitch + x + 1] = av_clip_uint8(p3 + 128);
+ }// for x
+
+ dst += dst_pitch << 1;
+
+ b0_ptr += pitch;
+ b1_ptr += pitch;
+ b2_ptr += pitch;
+ b3_ptr += pitch;
+ }// for y
+}
+
+/** butterfly operation for the inverse Haar transform */
+#define IVI_HAAR_BFLY(s1, s2, o1, o2, t) \
+ t = (s1 - s2) >> 1;\
+ o1 = (s1 + s2) >> 1;\
+ o2 = t;\
+
+/** inverse 8-point Haar transform */
+#define INV_HAAR8(s1, s5, s3, s7, s2, s4, s6, s8,\
+ d1, d2, d3, d4, d5, d6, d7, d8,\
+ t0, t1, t2, t3, t4, t5, t6, t7, t8) {\
+ t1 = s1 << 1; t5 = s5 << 1;\
+ IVI_HAAR_BFLY(t1, t5, t1, t5, t0); IVI_HAAR_BFLY(t1, s3, t1, t3, t0);\
+ IVI_HAAR_BFLY(t5, s7, t5, t7, t0); IVI_HAAR_BFLY(t1, s2, t1, t2, t0);\
+ IVI_HAAR_BFLY(t3, s4, t3, t4, t0); IVI_HAAR_BFLY(t5, s6, t5, t6, t0);\
+ IVI_HAAR_BFLY(t7, s8, t7, t8, t0);\
+ d1 = COMPENSATE(t1);\
+ d2 = COMPENSATE(t2);\
+ d3 = COMPENSATE(t3);\
+ d4 = COMPENSATE(t4);\
+ d5 = COMPENSATE(t5);\
+ d6 = COMPENSATE(t6);\
+ d7 = COMPENSATE(t7);\
+ d8 = COMPENSATE(t8); }
+
+/** inverse 4-point Haar transform */
+#define INV_HAAR4(s1, s3, s5, s7) {\
+ HAAR_BFLY(s1, s5); HAAR_BFLY(s1, s3); HAAR_BFLY(s5, s7);\
+ s1 = COMPENSATE(s1);\
+ s3 = COMPENSATE(s3);\
+ s5 = COMPENSATE(s5);\
+ s7 = COMPENSATE(s7); }
+
+void ff_ivi_inverse_haar_8x8(const int32_t *in, int16_t *out, uint32_t pitch,
+ const uint8_t *flags)
+{
+ int i, shift, sp1, sp2, sp3, sp4;
+ const int32_t *src;
+ int32_t *dst;
+ int tmp[64];
+ int t0, t1, t2, t3, t4, t5, t6, t7, t8;
+
+ /* apply the InvHaar8 to all columns */
+#define COMPENSATE(x) (x)
+ src = in;
+ dst = tmp;
+ for (i = 0; i < 8; i++) {
+ if (flags[i]) {
+ /* pre-scaling */
+ shift = !(i & 4);
+ sp1 = src[ 0] << shift;
+ sp2 = src[ 8] << shift;
+ sp3 = src[16] << shift;
+ sp4 = src[24] << shift;
+ INV_HAAR8( sp1, sp2, sp3, sp4,
+ src[32], src[40], src[48], src[56],
+ dst[ 0], dst[ 8], dst[16], dst[24],
+ dst[32], dst[40], dst[48], dst[56],
+ t0, t1, t2, t3, t4, t5, t6, t7, t8);
+ } else
+ dst[ 0] = dst[ 8] = dst[16] = dst[24] =
+ dst[32] = dst[40] = dst[48] = dst[56] = 0;
+
+ src++;
+ dst++;
+ }
+#undef COMPENSATE
+
+ /* apply the InvHaar8 to all rows */
+#define COMPENSATE(x) (x)
+ src = tmp;
+ for (i = 0; i < 8; i++) {
+ if ( !src[0] && !src[1] && !src[2] && !src[3]
+ && !src[4] && !src[5] && !src[6] && !src[7]) {
+ memset(out, 0, 8 * sizeof(out[0]));
+ } else {
+ INV_HAAR8(src[0], src[1], src[2], src[3],
+ src[4], src[5], src[6], src[7],
+ out[0], out[1], out[2], out[3],
+ out[4], out[5], out[6], out[7],
+ t0, t1, t2, t3, t4, t5, t6, t7, t8);
+ }
+ src += 8;
+ out += pitch;
+ }
+#undef COMPENSATE
+}
+
+void ff_ivi_dc_haar_2d(const int32_t *in, int16_t *out, uint32_t pitch,
+ int blk_size)
+{
+ int x, y;
+ int16_t dc_coeff;
+
+ dc_coeff = (*in + 0) >> 3;
+
+ for (y = 0; y < blk_size; out += pitch, y++) {
+ for (x = 0; x < blk_size; x++)
+ out[x] = dc_coeff;
+ }
+}
+
/** butterfly operation for the inverse slant transform */
#define IVI_SLANT_BFLY(s1, s2, o1, o2, t) \
t = s1 - s2;\
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