* #30480: video: backport av_pix_fmt_desc_get

daemon/src/video/libav_deps.h

@@ -75,6 +75,14 @@ extern "C" {
 #if !LIBAVUTIL_VERSION_CHECK(51, 42, 0, 74, 100) && !defined(FF_API_PIX_FMT)
 #define AVPixelFormat PixelFormat
 #define PIXEL_FORMAT(FMT) PIX_FMT_ ## FMT
+
+static inline const AVPixFmtDescriptor *av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
+{
+    if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)
+        return NULL;
+    return &av_pix_fmt_descriptors[pix_fmt];
+}
+
 #else
 #define PIXEL_FORMAT(FMT) AV_PIX_FMT_ ## FMT
 #endif

daemon/src/video/video_base.cpp

@@ -220,6 +220,10 @@ static int flipHorizontal(AVFrame *frame)
     uint8_t *inrow, *outrow;
     int step, hsub, vsub;
     const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get((AVPixelFormat) libav_utils::libav_pixel_format(frame->format));
+    if (!pix_desc) {
+        ERROR("Could not get pixel descriptor");
+        return -1;
+    }
     int max_step[4];    ///< max pixel step for each plane, expressed as a number of bytes
     av_image_fill_max_pixsteps(max_step, NULL, pix_desc);