* @param y the vertical coordinate of the first pixel to read
* @param w the width of the line to read, that is the number of
* values to write to \p dst
+ * @param read_pal_component if not zero and the format is a paletted
+ * format writes to \p dst the values corresponding to the palette
+ * component \p c in data[1], rather than the palette indexes in
+ * data[0]. The behavior is undefined if the format is not paletted.
*/
-static inline void read_line(uint16_t *dst, const uint8_t *data[4], const int linesize[4], const AVPixFmtDescriptor *desc, int x, int y, int c, int w)
+static inline void read_line(uint16_t *dst, const uint8_t *data[4], const int linesize[4],
+ const AVPixFmtDescriptor *desc, int x, int y, int c, int w, int read_pal_component)
{
AVComponentDescriptor comp= desc->comp[c];
int plane= comp.plane;
while(w--){
int val = show_bits(&gb, depth);
- if(flags & PIX_FMT_PAL)
+ if(read_pal_component)
val= data[1][4*val + c];
skip_bits(&gb, step);
*dst++= val;
if(flags & PIX_FMT_BE) val= AV_RB16(p);
else val= AV_RL16(p);
val = (val>>shift) & mask;
- if(flags & PIX_FMT_PAL)
+ if(read_pal_component)
val= data[1][4*val + c];
p+= step;
*dst++= val;