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avfilter/vf_histogram: use const for variables that are not supposed to change 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-10-04 16:48:19 +00:00
parent e41ea866fc
commit a2c14ba2b1
1 changed files with 13 additions and 13 deletions
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26
libavfilter/vf_histogram.c
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@ -247,9 +247,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
out->pts = in->pts;
for (k = 0; k < h->ncomp; k++) {
int is_chroma = (k == 1 || k == 2);
int dst_h = FF_CEIL_RSHIFT(outlink->h, (is_chroma ? h->desc->log2_chroma_h : 0));
int dst_w = FF_CEIL_RSHIFT(outlink->w, (is_chroma ? h->desc->log2_chroma_w : 0));
const int is_chroma = (k == 1 || k == 2);
const int dst_h = FF_CEIL_RSHIFT(outlink->h, (is_chroma ? h->desc->log2_chroma_h : 0));
const int dst_w = FF_CEIL_RSHIFT(outlink->w, (is_chroma ? h->desc->log2_chroma_w : 0));
for (i = 0; i < dst_h ; i++)
memset(out->data[h->desc->comp[k].plane] +
i * out->linesize[h->desc->comp[k].plane],
@ -260,7 +260,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
case MODE_LEVELS:
for (k = 0; k < h->ncomp; k++) {
const int p = h->desc->comp[k].plane;
int start = k * (h->level_height + h->scale_height) * h->display_mode;
const int start = k * (h->level_height + h->scale_height) * h->display_mode;
double max_hval_log;
unsigned max_hval = 0;
@ -299,16 +299,16 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
break;
case MODE_WAVEFORM:
for (k = 0; k < h->ncomp; k++) {
int offset = k * 256 * h->display_mode;
const int offset = k * 256 * h->display_mode;
gen_waveform(h, in, out, k, h->step, offset, h->waveform_mode);
}
break;
case MODE_COLOR:
for (i = 0; i < inlink->h; i++) {
int iw1 = i * in->linesize[1];
int iw2 = i * in->linesize[2];
const int iw1 = i * in->linesize[1];
const int iw2 = i * in->linesize[2];
for (j = 0; j < inlink->w; j++) {
int pos = in->data[1][iw1 + j] * out->linesize[0] + in->data[2][iw2 + j];
const int pos = in->data[1][iw1 + j] * out->linesize[0] + in->data[2][iw2 + j];
if (out->data[0][pos] < 255)
out->data[0][pos]++;
}
@ -325,12 +325,12 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
break;
case MODE_COLOR2:
for (i = 0; i < inlink->h; i++) {
int iw1 = i * in->linesize[1];
int iw2 = i * in->linesize[2];
const int iw1 = i * in->linesize[1];
const int iw2 = i * in->linesize[2];
for (j = 0; j < inlink->w; j++) {
int u = in->data[1][iw1 + j];
int v = in->data[2][iw2 + j];
int pos = u * out->linesize[0] + v;
const int u = in->data[1][iw1 + j];
const int v = in->data[2][iw2 + j];
const int pos = u * out->linesize[0] + v;
if (!out->data[0][pos])
out->data[0][pos] = FFABS(128 - u) + FFABS(128 - v);
out->data[1][pos] = u;