1 files changed, 108 insertions, 0 deletions
diff --git a/video/hwdec.h b/video/hwdec.h
new file mode 100644
index 0000000..723c60f
--- /dev/null
+++ b/video/hwdec.h
@@ -0,0 +1,108 @@
+#ifndef MP_HWDEC_H_
+#define MP_HWDEC_H_
+
+#include <libavutil/buffer.h>
+
+#include "options/m_option.h"
+
+struct mp_image_pool;
+
+struct mp_hwdec_ctx {
+    const char *driver_name; // NULL if unknown/not loaded
+
+    // libavutil-wrapped context, if available.
+    struct AVBufferRef *av_device_ref; // AVHWDeviceContext*
+
+    // List of allowed IMGFMT_s, terminated with 0.
+    // If NULL, all software formats are considered to be supported.
+    const int *supported_formats;
+    // HW format used by the hwdec
+    int hw_imgfmt;
+
+    // The name of this hwdec's matching conversion filter if available.
+    // This will be used for hardware conversion of frame formats.
+    // NULL otherwise.
+    const char *conversion_filter_name;
+
+    // The libavutil hwconfig to be used when querying constraints for the
+    // conversion filter. Can be NULL if no special config is required.
+    void *conversion_config;
+};
+
+// Used to communicate hardware decoder device handles from VO to video decoder.
+struct mp_hwdec_devices;
+
+struct mp_hwdec_devices *hwdec_devices_create(void);
+void hwdec_devices_destroy(struct mp_hwdec_devices *devs);
+
+struct mp_hwdec_ctx *hwdec_devices_get_by_imgfmt(struct mp_hwdec_devices *devs,
+                                                 int hw_imgfmt);
+
+// For code which still strictly assumes there is 1 (or none) device.
+struct mp_hwdec_ctx *hwdec_devices_get_first(struct mp_hwdec_devices *devs);
+
+// Return the n-th device. NULL if none.
+struct mp_hwdec_ctx *hwdec_devices_get_n(struct mp_hwdec_devices *devs, int n);
+
+// Add this to the list of internal devices. Adding the same pointer twice must
+// be avoided.
+void hwdec_devices_add(struct mp_hwdec_devices *devs, struct mp_hwdec_ctx *ctx);
+
+// Remove this from the list of internal devices. Idempotent/ignores entries
+// not added yet. This is not thread-safe.
+void hwdec_devices_remove(struct mp_hwdec_devices *devs, struct mp_hwdec_ctx *ctx);
+
+struct hwdec_imgfmt_request {
+    int imgfmt;
+    bool probing;
+};
+
+// Can be used to enable lazy loading of an API with hwdec_devices_request().
+// If used at all, this must be set/unset during initialization/uninitialization,
+// as concurrent use with hwdec_devices_request() is a race condition.
+void hwdec_devices_set_loader(struct mp_hwdec_devices *devs,
+    void (*load_api)(void *ctx, struct hwdec_imgfmt_request *params),
+    void *load_api_ctx);
+
+// Cause VO to lazily load all devices for a specified img format, and will
+// block until this is done (even if not available). Pass IMGFMT_NONE to load
+// all available devices.
+void hwdec_devices_request_for_img_fmt(struct mp_hwdec_devices *devs,
+                                       struct hwdec_imgfmt_request *params);
+
+// Return "," concatenated list (for introspection/debugging). Use talloc_free().
+char *hwdec_devices_get_names(struct mp_hwdec_devices *devs);
+
+struct mp_image;
+struct mpv_global;
+
+struct hwcontext_create_dev_params {
+    bool probing;   // if true, don't log errors if unavailable
+};
+
+// Per AV_HWDEVICE_TYPE_* functions, queryable via hwdec_get_hwcontext_fns().
+// All entries are strictly optional.
+struct hwcontext_fns {
+    int av_hwdevice_type;
+    // Fill in special format-specific requirements.
+    void (*refine_hwframes)(struct AVBufferRef *hw_frames_ctx);
+    // Returns a AVHWDeviceContext*. Used for copy hwdecs.
+    struct AVBufferRef *(*create_dev)(struct mpv_global *global,
+                                      struct mp_log *log,
+                                      struct hwcontext_create_dev_params *params);
+    // Return whether this is using some sort of sub-optimal emulation layer.
+    bool (*is_emulated)(struct AVBufferRef *hw_device_ctx);
+};
+
+// The parameter is of type enum AVHWDeviceType (as in int to avoid extensive
+// recursive includes). May return NULL for unknown device types.
+const struct hwcontext_fns *hwdec_get_hwcontext_fns(int av_hwdevice_type);
+
+extern const struct hwcontext_fns hwcontext_fns_cuda;
+extern const struct hwcontext_fns hwcontext_fns_d3d11;
+extern const struct hwcontext_fns hwcontext_fns_drmprime;
+extern const struct hwcontext_fns hwcontext_fns_dxva2;
+extern const struct hwcontext_fns hwcontext_fns_vaapi;
+extern const struct hwcontext_fns hwcontext_fns_vdpau;
+
+#endif