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Code Issues Releases Activity

showinfo: fix computation of Adler checksum

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Previously the code was computing the checksum only for the first line
of each plane.
This commit is contained in:
Stefano Sabatini 2011-05-14 13:20:52 +02:00
parent 10931720cd
commit bb82ea797f
1 changed files with 11 additions and 5 deletions
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16
libavfilter/vf_showinfo.c
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@ -43,13 +43,19 @@ static void end_frame(AVFilterLink *inlink)
AVFilterContext *ctx = inlink->dst; AVFilterContext *ctx = inlink->dst;
ShowInfoContext *showinfo = ctx->priv; ShowInfoContext *showinfo = ctx->priv;
AVFilterBufferRef *picref = inlink->cur_buf; AVFilterBufferRef *picref = inlink->cur_buf;
uint32_t plane_crc[4], crc = 0; uint32_t plane_crc[4] = {0}, crc = 0;
int plane; int i, plane, vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
for (plane = 0; plane < 4; plane++) { for (plane = 0; picref->data[plane] && plane < 4; plane++) {
size_t linesize = av_image_get_linesize(picref->format, picref->video->w, plane); size_t linesize = av_image_get_linesize(picref->format, picref->video->w, plane);
plane_crc[plane] = av_adler32_update(0 , picref->data[plane], linesize); uint8_t *data = picref->data[plane];
crc = av_adler32_update(crc, picref->data[plane], linesize); int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
for (i = 0; i < h; i++) {
plane_crc[plane] = av_adler32_update(plane_crc[plane], data, linesize);
crc = av_adler32_update(crc, data, linesize);
data += picref->linesize[plane];
}
} }
av_log(ctx, AV_LOG_INFO, av_log(ctx, AV_LOG_INFO,