vaapi: move AVHWFramesContext setup code to common code

In a way it can be reused. For now, sw_format and initial_pool_size
determination are still vaapi-specific. I'm hoping this can be eventally
moved to libavcodec in some way. Checking the supported_formats array is
not really vaapi-specific, and could be moved to the generic code path
too, but for now it would make things more complex.

hw_cuda.c can't use this, but hw_vdpau.c will in the following commit.

1 files changed, 4 insertions, 0 deletions

diff --git a/video/decode/lavc.h b/video/decode/lavc.h
index fe7f9937f4..fd1c7feb42 100644
--- a/video/decode/lavc.h
+++ b/video/decode/lavc.h
@@ -64,6 +64,8 @@ typedef struct lavc_ctx {
     int hwdec_fail_count;
 
     struct mp_image_pool *hwdec_swpool;
+
+    AVBufferRef *cached_hw_frames_ctx;
 } vd_ffmpeg_ctx;
 
 struct vd_lavc_hwdec {
@@ -118,6 +120,8 @@ const struct hwdec_profile_entry *hwdec_find_profile(
 bool hwdec_check_codec_support(const char *codec,
                                const struct hwdec_profile_entry *table);
 int hwdec_get_max_refs(struct lavc_ctx *ctx);
+int hwdec_setup_hw_frames_ctx(struct lavc_ctx *ctx, AVBufferRef *device_ctx,
+                              int av_sw_format, int initial_pool_size);
 
 const char *hwdec_find_decoder(const char *codec, const char *suffix);