It's never been touched or used in any way since it was added in 2003
and only works for PIX_FMT_PAL8, which makes me conclude that nobody's
ever used it.
---
libavcodec/avcodec.h | 3 +++
libavcodec/imgconvert.c | 2 ++
libavcodec/version.h | 3 +++
3 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index aae5486..46aa9d6 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -3495,6 +3495,7 @@ int avcodec_get_pix_fmt_loss(enum PixelFormat
dst_pix_fmt, enum PixelFormat src_
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum
PixelFormat src_pix_fmt,
int has_alpha, int *loss_ptr);
+#if FF_API_GET_ALPHA_INFO
#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent
pixels */
#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
@@ -3502,8 +3503,10 @@ enum PixelFormat avcodec_find_best_pix_fmt(int64_t
pix_fmt_mask, enum PixelForma
* Tell if an image really has transparent alpha values.
* @return ored mask of FF_ALPHA_xxx constants
*/
+attribute_deprecated
int img_get_alpha_info(const AVPicture *src,
enum PixelFormat pix_fmt, int width, int height);
+#endif
/* deinterlace a picture */
/* deinterlace - if not supported return -1 */
diff --git a/libavcodec/imgconvert.c b/libavcodec/imgconvert.c
index c446aac..eb398f7 100644
--- a/libavcodec/imgconvert.c
+++ b/libavcodec/imgconvert.c
@@ -862,6 +862,7 @@ int av_picture_pad(AVPicture *dst, const AVPicture *src,
int height, int width,
return 0;
}
+#if FF_API_GET_ALPHA_INFO
/* NOTE: we scan all the pixels to have an exact information */
static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
{
@@ -908,6 +909,7 @@ int img_get_alpha_info(const AVPicture *src,
}
return ret;
}
+#endif
#if !(HAVE_MMX && HAVE_YASM)
/* filter parameters: [-1 4 2 4 -1] // 8 */
diff --git a/libavcodec/version.h b/libavcodec/version.h
index ee647be..e5ab5eb 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -98,5 +98,8 @@
#ifndef FF_API_MJPEG_GLOBAL_OPTS
#define FF_API_MJPEG_GLOBAL_OPTS (LIBAVCODEC_VERSION_MAJOR < 54)
#endif
+#ifndef FF_API_GET_ALPHA_INFO
+#define FF_API_GET_ALPHA_INFO (LIBAVCODEC_VERSION_MAJOR < 54)
+#endif
#endif /* AVCODEC_VERSION_H */
--
1.7.6.3
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