diff options
Diffstat (limited to 'libavutil/hwcontext.h')
-rw-r--r-- | libavutil/hwcontext.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libavutil/hwcontext.h b/libavutil/hwcontext.h index 037ca64224..49c7a21c1e 100644 --- a/libavutil/hwcontext.h +++ b/libavutil/hwcontext.h @@ -269,6 +269,32 @@ int av_hwdevice_ctx_create(AVBufferRef **device_ctx, enum AVHWDeviceType type, const char *device, AVDictionary *opts, int flags); /** + * Create a new device of the specified type from an existing device. + * + * If the source device is a device of the target type or was originally + * derived from such a device (possibly through one or more intermediate + * devices of other types), then this will return a reference to the + * existing device of the same type as is requested. + * + * Otherwise, it will attempt to derive a new device from the given source + * device. If direct derivation to the new type is not implemented, it will + * attempt the same derivation from each ancestor of the source device in + * turn looking for an implemented derivation method. + * + * @param dst_ctx On success, a reference to the newly-created + * AVHWDeviceContext. + * @param type The type of the new device to create. + * @param src_ctx A reference to an existing AVHWDeviceContext which will be + * used to create the new device. + * @param flags Currently unused; should be set to zero. + * @return Zero on success, a negative AVERROR code on failure. + */ +int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ctx, + enum AVHWDeviceType type, + AVBufferRef *src_ctx, int flags); + + +/** * Allocate an AVHWFramesContext tied to a given device context. * * @param device_ctx a reference to a AVHWDeviceContext. This function will make |