avcodec: remove ff_is_hwaccel_pix_fmt

It is used only in one place and is unlikely it would be needed
elsewhere.

libavcodec/imgconvert.c

@@ -415,12 +415,6 @@ void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int
     *v_shift = desc->log2_chroma_h;
 }
 
-int ff_is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
-{
-    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
-    return desc->flags & PIX_FMT_HWACCEL;
-}
-
 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
                    enum AVPixelFormat pix_fmt, int width, int height)
 {

libavcodec/internal.h

@@ -85,11 +85,6 @@ struct AVCodecDefault {
     const uint8_t *value;
 };
 
-/**
- * Determine whether pix_fmt is a hardware accelerated format.
- */
-int ff_is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt);
-
 /**
  * Return the hardware accelerated codec for codec codec_id and
  * pixel format pix_fmt.

libavcodec/utils.c

@@ -628,9 +628,15 @@ int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2,
     return 0;
 }
 
+static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+    return desc->flags & PIX_FMT_HWACCEL;
+}
+
 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
 {
-    while (*fmt != AV_PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
+    while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
         ++fmt;
     return fmt[0];
 }