av_free(line);
}
- for (y = 0; y < img->frame->height; y++) {
- for (x = 0; x < img->frame->width; x++) {
- p = GET_PIXEL(img->frame, x, y);
- i = p[2];
- if (i >= pal->frame->width) {
- AV_WB32(p, 0x00000000);
- } else {
- const uint8_t *pi = GET_PIXEL(pal->frame, i, 0);
- AV_COPY32(p, pi);
+ // switch to local palette if it's worth initializing it
+ if (img->frame->height * img->frame->width > 300) {
+ uint8_t palette[256 * 4];
+ const int size = pal->frame->width * 4;
+ av_assert0(size <= 1024U);
+ memcpy(palette, GET_PIXEL(pal->frame, 0, 0), size); // copy palette
+ // set extra entries to transparent black
+ memset(palette + size, 0, 256 * 4 - size);
+ for (y = 0; y < img->frame->height; y++) {
+ for (x = 0; x < img->frame->width; x++) {
+ p = GET_PIXEL(img->frame, x, y);
+ i = p[2];
+ AV_COPY32(p, &palette[i * 4]);
+ }
+ }
+ } else {
+ for (y = 0; y < img->frame->height; y++) {
+ for (x = 0; x < img->frame->width; x++) {
+ p = GET_PIXEL(img->frame, x, y);
+ i = p[2];
+ if (i >= pal->frame->width) {
+ AV_WB32(p, 0x00000000);
+ } else {
+ const uint8_t *pi = GET_PIXEL(pal->frame, i, 0);
+ AV_COPY32(p, pi);
+ }
}
}
}