obs-ffmpeg: Use new side-data FFmpeg 6.1 API

Fixes for using FFmpeg 6.1 due to deprecations. Uses `#if` macros to
allow builds for using older versions of FFmpeg.

This commit replaces usage of `av_stream_add_side_data(...)` with
`av_packet_side_data_add(...)`, as the former was deprecated in favor of
the latter.

The FFmpeg commit that deprecated `av_stream_add_side_data(...)` is [1].

The FFmpeg commit that introduced `av_packet_side_data_add(...)` is [2].

Note that the deprecation commit is after the new API function. The
commit in between [3] appears to be changes that migrates to the usage
of the new API function.

[1]: avformat/avformat: use the side data from AVStream.codecpar
https://github.com/FFmpeg/FFmpeg/commit/5432d2aacad5fa7420fe2d9369ed061d521e92d6

[2]: avcodec/packet: add generic side data helpers
https://github.com/FFmpeg/FFmpeg/commit/74279227dd28d01b447edb8e617a545982171c2c

[3]: avcodec/codec_par: add side data to AVCodecParameters
https://github.com/FFmpeg/FFmpeg/commit/21d7cc6fa9a26e94965fa71b25655d07568450fe

plugins/obs-ffmpeg/ffmpeg-mux/ffmpeg-mux.c

@@ -498,9 +498,17 @@ static void create_video_stream(struct ffmpeg_mux *ffm)
 			av_content_light_metadata_alloc(&content_size);
 		content->MaxCLL = max_luminance;
 		content->MaxFALL = max_luminance;
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60, 31, 102)
 		av_stream_add_side_data(ffm->video_stream,
 					AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
 					(uint8_t *)content, content_size);
+#else
+		av_packet_side_data_add(
+			&ffm->video_stream->codecpar->coded_side_data,
+			&ffm->video_stream->codecpar->nb_coded_side_data,
+			AV_PKT_DATA_CONTENT_LIGHT_LEVEL, (uint8_t *)content,
+			content_size, 0);
+#endif
 
 		AVMasteringDisplayMetadata *const mastering =
 			av_mastering_display_metadata_alloc();
@@ -516,10 +524,18 @@ static void create_video_stream(struct ffmpeg_mux *ffm)
 		mastering->max_luminance = av_make_q(max_luminance, 1);
 		mastering->has_primaries = 1;
 		mastering->has_luminance = 1;
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60, 31, 102)
 		av_stream_add_side_data(ffm->video_stream,
 					AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
 					(uint8_t *)mastering,
 					sizeof(*mastering));
+#else
+		av_packet_side_data_add(
+			&ffm->video_stream->codecpar->coded_side_data,
+			&ffm->video_stream->codecpar->nb_coded_side_data,
+			AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
+			(uint8_t *)mastering, sizeof(*mastering), 0);
+#endif
 	}
 
 	if (ffm->output->oformat->flags & AVFMT_GLOBALHEADER)

plugins/obs-ffmpeg/obs-ffmpeg-mpegts.c

@@ -168,9 +168,17 @@ static bool create_video_stream(struct ffmpeg_output *stream,
 			av_content_light_metadata_alloc(&content_size);
 		content->MaxCLL = hdr_nominal_peak_level;
 		content->MaxFALL = hdr_nominal_peak_level;
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60, 31, 102)
 		av_stream_add_side_data(data->video,
 					AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
 					(uint8_t *)content, content_size);
+#else
+		av_packet_side_data_add(
+			&data->video->codecpar->coded_side_data,
+			&data->video->codecpar->nb_coded_side_data,
+			AV_PKT_DATA_CONTENT_LIGHT_LEVEL, (uint8_t *)content,
+			content_size, 0);
+#endif
 
 		AVMasteringDisplayMetadata *const mastering =
 			av_mastering_display_metadata_alloc();
@@ -186,10 +194,18 @@ static bool create_video_stream(struct ffmpeg_output *stream,
 		mastering->max_luminance = av_make_q(hdr_nominal_peak_level, 1);
 		mastering->has_primaries = 1;
 		mastering->has_luminance = 1;
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60, 31, 102)
 		av_stream_add_side_data(data->video,
 					AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
 					(uint8_t *)mastering,
 					sizeof(*mastering));
+#else
+		av_packet_side_data_add(
+			&data->video->codecpar->coded_side_data,
+			&data->video->codecpar->nb_coded_side_data,
+			AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
+			(uint8_t *)mastering, sizeof(*mastering), 0);
+#endif
 	}
 	context = avcodec_alloc_context3(NULL);
 	context->codec_type = codec->type;

plugins/obs-ffmpeg/obs-ffmpeg-output.c

@@ -213,9 +213,17 @@ static bool create_video_stream(struct ffmpeg_data *data)
 			av_content_light_metadata_alloc(&content_size);
 		content->MaxCLL = hdr_nominal_peak_level;
 		content->MaxFALL = hdr_nominal_peak_level;
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60, 31, 102)
 		av_stream_add_side_data(data->video,
 					AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
 					(uint8_t *)content, content_size);
+#else
+		av_packet_side_data_add(
+			&data->video->codecpar->coded_side_data,
+			&data->video->codecpar->nb_coded_side_data,
+			AV_PKT_DATA_CONTENT_LIGHT_LEVEL, (uint8_t *)content,
+			content_size, 0);
+#endif
 
 		AVMasteringDisplayMetadata *const mastering =
 			av_mastering_display_metadata_alloc();
@@ -231,10 +239,18 @@ static bool create_video_stream(struct ffmpeg_data *data)
 		mastering->max_luminance = av_make_q(hdr_nominal_peak_level, 1);
 		mastering->has_primaries = 1;
 		mastering->has_luminance = 1;
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(60, 31, 102)
 		av_stream_add_side_data(data->video,
 					AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
 					(uint8_t *)mastering,
 					sizeof(*mastering));
+#else
+		av_packet_side_data_add(
+			&data->video->codecpar->coded_side_data,
+			&data->video->codecpar->nb_coded_side_data,
+			AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
+			(uint8_t *)mastering, sizeof(*mastering), 0);
+#endif
 	}
 
 	closest_format = data->config.format;