+int av_get_padded_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
+{
+ int c, bits = 0;
+ int log2_pixels = pixdesc->log2_chroma_w + pixdesc->log2_chroma_h;
+ int steps[4] = {0};
+
+ for (c = 0; c < pixdesc->nb_components; c++) {
+ AVComponentDescriptor *comp = &pixdesc->comp[c];
+ int s = c == 1 || c == 2 ? 0 : log2_pixels;
+ steps[comp->plane] = (comp->step_minus1 + 1) << s;
+ }
+ for (c = 0; c < 4; c++)
+ bits += steps[c];
+
+ if(!(pixdesc->flags & PIX_FMT_BITSTREAM))
+ bits *= 8;
+
+ return bits >> log2_pixels;
+}
+