av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
return AVERROR_INVALIDDATA;
}
+ if (!s->font_height) {
+ av_log(avctx, AV_LOG_ERROR, "invalid font height\n");
+ return AVERROR_INVALIDDATA;
+ }
} else {
s->font_height = 8;
s->flags = 0;
break;
}
}
- if (avctx->width < FONT_WIDTH || avctx->height < s->font_height)
+ if (avctx->width < FONT_WIDTH || avctx->height < s->font_height) {
+ av_log(avctx, AV_LOG_ERROR, "Resolution too small for font.\n");
return AVERROR_INVALIDDATA;
+ }
return 0;
}