Introduce AVCPP_API_HAS_AVSIDEDATADESCRIPTOR

AVSideDataDescriptor and related functionality was introduced about
ffmpeg 7.0. Handle it to build with ffmpeg 4.0+

Author: h4tr3d

src/avcpp/avcompat.h

@@ -49,6 +49,8 @@ extern "C" {
 #endif // if AVCPP_HAS_AVFORMAT
 // AVBuffer API switch to size_t
 #define AVCPP_API_AVBUFFER_SIZE_T (AVCPP_AVUTIL_VERSION_MAJOR >= 57)
+// AVSideDataDescriptor exisits
+#define AVCPP_API_HAS_AVSIDEDATADESCRIPTOR (AVCPP_AVUTIL_VERSION_INT >= AV_VERSION_INT(59, 10, 100))
 
 #if defined(__ICL) || defined (__INTEL_COMPILER)
 #    define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:1478))

src/avcpp/frame.cpp

@@ -893,6 +893,7 @@ Dictionary FrameSideData::metadata() const noexcept
     return m_raw ? Dictionary{m_raw->metadata, false} : Dictionary{};
 }
 
+#if AVCPP_API_HAS_AVSIDEDATADESCRIPTOR
 std::optional<AVSideDataDescriptor> FrameSideData::descriptor() const noexcept
 {
     return m_raw ? descriptor(m_raw->type) : std::nullopt;
@@ -903,6 +904,7 @@ std::optional<AVSideDataDescriptor> FrameSideData::descriptor(AVFrameSideDataTyp
     auto desc = av_frame_side_data_desc(type);
     return desc ? std::optional(*desc) : std::nullopt;
 }
+#endif
 
 bool FrameSideData::empty() const noexcept
 {

src/avcpp/frame.h

@@ -53,10 +53,12 @@ class FrameSideData : public FFWrapperPtr<AVFrameSideData>
      */
     Dictionary metadata() const noexcept;
 
-    std::optional<AVSideDataDescriptor> descriptor() const noexcept;
-
     static std::string_view name(AVFrameSideDataType type) noexcept;
+
+#if AVCPP_API_HAS_AVSIDEDATADESCRIPTOR
+    std::optional<AVSideDataDescriptor> descriptor() const noexcept;
     static std::optional<AVSideDataDescriptor> descriptor(AVFrameSideDataType type) noexcept;
+#endif // AVCPP_API_HAS_AVSIDEDATADESCRIPTOR
 
     bool empty() const noexcept;
     operator bool() const noexcept;