On Wed, Jul 15, 2015 at 07:48:52PM +0000, Paul B Mahol wrote:
> Signed-off-by: Paul B Mahol <one...@gmail.com>
[...]
> +static void filter_3x3(ConvolutionContext *s, AVFrame *in, AVFrame *out, int
> plane)
> +{
> + const uint8_t *src = in->data[plane];
> + uint8_t *dst = out->data[plane];
> + const int stride = in->linesize[plane];
> + const int bstride = s->bstride;
> + const int height = s->planeheight[plane];
> + const int width = s->planewidth[plane];
> + uint8_t *p0 = s->buffer + 16;
> + uint8_t *p1 = p0 + bstride;
> + uint8_t *p2 = p1 + bstride;
> + uint8_t *orig = p0, *end = p2;
> + const int *matrix = s->matrix[plane];
> + const float rdiv = s->rdiv;
> + const float bias = s->bias;
> + int y, x;
> +
> + line_copy8(p0, src + stride, width, 1);
> + line_copy8(p1, src, width, 1);
> +
> + for (y = 0; y < height; y++) {
> + src += stride * (y < height - 1 ? 1 : -1);
> + line_copy8(p2, src, width, 1);
> +
> + for (x = 0; x < width; x++) {
> + int sum = p0[x - 1] * matrix[0] +
> + p0[x] * matrix[1] +
> + p0[x + 1] * matrix[2] +
> + p1[x - 1] * matrix[3] +
> + p1[x] * matrix[4] +
> + p1[x + 1] * matrix[5] +
> + p2[x - 1] * matrix[6] +
> + p2[x] * matrix[7] +
> + p2[x + 1] * matrix[8];
> + sum = (int)(sum * rdiv + bias + 0.5f);> + dst[x] = av_clip(sum, 0, 255); could use av_clip_uint8() -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Why not whip the teacher when the pupil misbehaves? -- Diogenes of Sinope
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