[FFmpeg-devel] [PATCH] hwcontext_videotoolbox: add vt_device_derive

[gnattu]

There is no device context to be setup, nor devices to be
selected with VideoToolbox. Just a simple return would allow
us to use derived device in filters like
`hwupload=derive_device=videotoolbox`

Signed-off-by: Gnattu OC <gnattuoc at me.com>
---
 libavutil/hwcontext_videotoolbox.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libavutil/hwcontext_videotoolbox.c b/libavutil/hwcontext_videotoolbox.c
index fe469dc161..d13199eca7 100644
--- a/libavutil/hwcontext_videotoolbox.c
+++ b/libavutil/hwcontext_videotoolbox.c
@@ -759,6 +759,14 @@ static int vt_device_create(AVHWDeviceContext *ctx, const char *device,
     return 0;
 }
 
+static int vt_device_derive(AVHWDeviceContext *device_ctx,
+                            AVHWDeviceContext *src_ctx, AVDictionary *opts,
+                            int flags)
+{
+    // There is no context to be setup with VT, just return.
+    return 0;
+}
+
 const HWContextType ff_hwcontext_type_videotoolbox = {
     .type                 = AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
     .name                 = "videotoolbox",
@@ -766,6 +774,7 @@ const HWContextType ff_hwcontext_type_videotoolbox = {
     .frames_priv_size     = sizeof(VTFramesContext),
 
     .device_create        = vt_device_create,
+    .device_derive        = vt_device_derive,
     .frames_hwctx_size    = sizeof(AVVTFramesContext),
     .frames_init          = vt_frames_init,
     .frames_get_buffer    = vt_get_buffer,
-- 
2.39.3 (Apple Git-145)