ffmpeg: Support setting the hardware device to use when filtering

This only supports one device globally, but more can be used by
passing them with input streams in hw_frames_ctx or by deriving new
devices inside a filter graph with hwmap.

(cherry picked from commit e669db76108de8d7a36c2274c99da82cc94d1dd1)

1 files changed, 1 insertions, 0 deletions

diff --git a/ffmpeg.h b/ffmpeg.h
index fbb9172d74..c3854bcb4a 100644
--- a/ffmpeg.h
+++ b/ffmpeg.h
@@ -628,6 +628,7 @@ extern AVBufferRef *hw_device_ctx;
 #if CONFIG_QSV
 extern char *qsv_device;
 #endif
+extern HWDevice *filter_hw_device;
 
 
 void term_init(void);