avcodec: Add missing FF_API define for libavcodec pix fmt API

avcodec_find_best_pix_fmt2 has been deprecated and replaced by
avcodec_find_best_pix_fmt_of_2 in 2a54ae9df8.
avcodec_find_best_pix_fmt_of_2 and avcodec_get_pix_fmt_loss meanwhile
were deprecated in 617e866e25 when these
functions were de facto moved to libavutil; this has been mentioned in
APIchanges in f7a1c5e4d2. Yet the
attribute_deprecated was never set for the latter two functions and they
were not wrapped in an FF_API define. This commit does this.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavcodec/avcodec.h

@@ -3786,12 +3786,6 @@ void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int
  */
 unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt);
 
-/**
- * @deprecated see av_get_pix_fmt_loss()
- */
-int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
-                             int has_alpha);
-
 /**
  * Find the best pixel format to convert to given a certain source pixel
  * format.  When converting from one pixel format to another, information loss
@@ -3813,15 +3807,24 @@ enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *p
                                             enum AVPixelFormat src_pix_fmt,
                                             int has_alpha, int *loss_ptr);
 
+#if FF_API_AVCODEC_PIX_FMT
+/**
+ * @deprecated see av_get_pix_fmt_loss()
+ */
+attribute_deprecated
+int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
+                             int has_alpha);
 /**
  * @deprecated see av_find_best_pix_fmt_of_2()
  */
+attribute_deprecated
 enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
                                             enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
 
 attribute_deprecated
 enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
                                             enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
+#endif
 
 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
 

libavcodec/imgconvert.c

@@ -44,6 +44,7 @@ void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int
 }
 #endif
 
+#if FF_API_AVCODEC_PIX_FMT
 int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt,
                              enum AVPixelFormat src_pix_fmt,
                              int has_alpha)
@@ -60,9 +61,10 @@ enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt
 enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
                                             enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
 {
-    return avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr);
+    return av_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr);
 }
 
+#endif
 enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list,
                                             enum AVPixelFormat src_pix_fmt,
                                             int has_alpha, int *loss_ptr){
@@ -73,7 +75,7 @@ enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *p
 
     for (i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++) {
         loss = loss_ptr ? *loss_ptr : 0;
-        best = avcodec_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, &loss);
+        best = av_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, &loss);
     }
 
     if (loss_ptr)

libavcodec/version.h

@@ -144,6 +144,9 @@
 #ifndef FF_API_OLD_ENCDEC
 #define FF_API_OLD_ENCDEC          (LIBAVCODEC_VERSION_MAJOR < 59)
 #endif
+#ifndef FF_API_AVCODEC_PIX_FMT
+#define FF_API_AVCODEC_PIX_FMT     (LIBAVCODEC_VERSION_MAJOR < 59)
+#endif
 #ifndef FF_API_THREAD_SAFE_CALLBACKS
 #define FF_API_THREAD_SAFE_CALLBACKS (LIBAVCODEC_VERSION_MAJOR < 60)
 #endif