looking-glass/client/lg-decoder.h

/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/

#pragma once

#include "lg-renderer.h"

#include <stdint.h>
#include <stdbool.h>
#include <SDL2/SDL.h>

#include <GL/gl.h>

typedef enum LG_OutFormat
{
  LG_OUTPUT_INVALID,

  LG_OUTPUT_BGRA,
  LG_OUTPUT_RGBA,
  LG_OUTPUT_RGBA10,
  LG_OUTPUT_YUV420
}
LG_OutFormat;

typedef bool            (* LG_DecoderCreate        )(void ** opaque);
typedef void            (* LG_DecoderDestroy       )(void  * opaque);
typedef bool            (* LG_DecoderInitialize    )(void  * opaque, const LG_RendererFormat format, SDL_Window * window);
typedef void            (* LG_DecoderDeInitialize  )(void  * opaque);
typedef LG_OutFormat    (* LG_DecoderGetOutFormat  )(void  * opaque);
typedef unsigned int    (* LG_DecoderGetFramePitch )(void  * opaque);
typedef unsigned int    (* LG_DecoderGetFrameStride)(void  * opaque);
typedef bool            (* LG_DecoderDecode        )(void  * opaque, const uint8_t * src, size_t srcSize);
typedef const uint8_t * (* LG_DecoderGetBuffer     )(void  * opaque);

typedef bool (* LG_DecoderInitGLTexture  )(void * opaque, GLenum target, GLuint texture, void ** ref);
typedef void (* LG_DecoderFreeGLTexture  )(void * opaque, void * ref);
typedef bool (* LG_DecoderUpdateGLTexture)(void * opaque, void * ref);

typedef struct LG_Decoder
{
  // mandatory support
  const char *             name;
  LG_DecoderCreate         create;
  LG_DecoderDestroy        destroy;
  LG_DecoderInitialize     initialize;
  LG_DecoderDeInitialize   deinitialize;
  LG_DecoderGetOutFormat   get_out_format;
  LG_DecoderGetFramePitch  get_frame_pitch;
  LG_DecoderGetFrameStride get_frame_stride;
  LG_DecoderDecode         decode;
  LG_DecoderGetBuffer      get_buffer;

  // optional support
  const bool                has_gl;
  LG_DecoderInitGLTexture   init_gl_texture;
  LG_DecoderFreeGLTexture   free_gl_texture;
  LG_DecoderUpdateGLTexture update_gl_texture;
}
LG_Decoder;