Added interface for GDNative Videodecoder.

Interface and callback api added for Videodecoder support.
Should be able to construct any format videodecoder using
only the given interface.

GSoC 2018 project.

1 files changed, 75 insertions, 0 deletions

diff --git a/modules/gdnative/include/videodecoder/godot_videodecoder.h b/modules/gdnative/include/videodecoder/godot_videodecoder.h
new file mode 100644
index 0000000000..360fc0f5f5
--- /dev/null
+++ b/modules/gdnative/include/videodecoder/godot_videodecoder.h
@@ -0,0 +1,75 @@
+/*************************************************************************/
+/*  godot_videodecoder.h                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef GODOT_NATIVEVIDEODECODER_H
+#define GODOT_NATIVEVIDEODECODER_H
+
+#include <gdnative/gdnative.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GODOTAV_API_MAJOR 0
+#define GODOTAV_API_MINOR 1
+
+typedef struct
+{
+	godot_gdnative_api_version version;
+	void *next;
+	void *(*constructor)(godot_object *);
+	void (*destructor)(void *);
+	const char *(*get_plugin_name)(void);
+	const char **(*get_supported_extensions)(int *count);
+	godot_bool (*open_file)(void *, void *); // data struct, and a FileAccess pointer
+	godot_real (*get_length)(const void *);
+	godot_real (*get_playback_position)(const void *);
+	void (*seek)(void *, godot_real);
+	void (*set_audio_track)(void *, godot_int);
+	void (*update)(void *, godot_real);
+	godot_pool_byte_array *(*get_videoframe)(void *);
+	godot_int (*get_audioframe)(void *, float *, int);
+	godot_int (*get_channels)(const void *);
+	godot_int (*get_mix_rate)(const void *);
+	godot_vector2 (*get_texture_size)(const void *);
+} godot_videodecoder_interface_gdnative;
+
+typedef int (*GDNativeAudioMixCallback)(void *, const float *, int);
+
+// FileAccess wrappers for custom FFmpeg IO
+godot_int GDAPI godot_videodecoder_file_read(void *file_ptr, uint8_t *buf, int buf_size);
+int64_t GDAPI godot_videodecoder_file_seek(void *file_ptr, int64_t pos, int whence);
+void GDAPI godot_videodecoder_register_decoder(const godot_videodecoder_interface_gdnative *p_interface);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GODOT_NATIVEVIDEODECODER_H */