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engine: client: avi: use typeof() to declare function pointers to ffmpeg API

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This commit is contained in:
Alibek Omarov
2026-04-09 09:52:52 +05:00
parent a219ca7371
commit bb734456f6
1 changed files with 68 additions and 0 deletions
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68
engine/client/avi/avi_ffmpeg.h
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@@ -26,6 +26,72 @@ GNU General Public License for more details.
#if XASH_FFMPEG_DLOPEN
// using typeof gives more resilience to function declaration changes
// but it's only available in GCC and standardized in C23
#if defined(__GNUC__) || __STDC_VERSION__ >= 202311L
#define SUPPORTED_AVU_VERSION_MAJOR LIBAVUTIL_VERSION_MAJOR
#define SUPPORTED_AVF_VERSION_MAJOR LIBAVFORMAT_VERSION_MAJOR
#define SUPPORTED_AVC_VERSION_MAJOR LIBAVCODEC_VERSION_MAJOR
#define SUPPORTED_SWR_VERSION_MAJOR LIBSWRESAMPLE_VERSION_MAJOR
#define SUPPORTED_SWS_VERSION_MAJOR LIBSWSCALE_VERSION_MAJOR
#define F( func ) \
typedef typeof( func ) func##_t; \
func##_t *p##func
// libavutil
F( avutil_version );
F( av_frame_alloc );
F( av_frame_free );
F( av_frame_ref );
F( av_frame_unref );
F( av_strerror );
F( av_free );
F( av_get_bytes_per_sample );
F( av_get_media_type_string );
F( av_image_alloc );
// libavformat
F( avformat_version );
F( av_find_best_stream );
F( av_read_frame );
F( av_seek_frame );
F( avformat_close_input );
F( avformat_find_stream_info );
F( avformat_open_input );
// libavcodec
F( avcodec_version );
F( av_packet_alloc );
F( av_packet_free );
F( av_packet_unref );
F( avcodec_alloc_context3 );
F( avcodec_find_decoder );
F( avcodec_flush_buffers );
F( avcodec_free_context );
F( avcodec_open2 );
F( avcodec_parameters_to_context );
F( avcodec_receive_frame );
F( avcodec_send_packet );
// libswresample
F( swresample_version );
F( swr_alloc_set_opts2 );
F( swr_convert );
F( swr_free );
F( swr_init );
// libswscale
F( swscale_version );
F( sws_freeContext );
F( sws_getContext );
F( sws_scale );
#undef F
#else // !defined(__GNUC__) && __STDC_VERSION__ < 202311L
// the following symbols were taken from ffmpeg public headers
// on each major ffmpeg uprgade, they must be validated
// ffmpeg guarantees API and ABI compatibility between major versions
@@ -105,6 +171,8 @@ void (*psws_freeContext)( struct SwsContext *swsContext );
struct SwsContext *(*psws_getContext)( int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param );
int (*psws_scale)( struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[] );
#endif // defined(__GNUC__) || __STDC_VERSION__ >= 202311L
#else // !XASH_FFMPEG_DLOPEN
#define SUPPORTED_AVU_VERSION_MAJOR LIBAVUTIL_VERSION_MAJOR