LookingGlass/client/decoders/h264.c

/*
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
*/

#include "lg-decoder.h"

#include "debug.h"

#include <stdlib.h>
#include <string.h>

struct Inst
{
  bool initialized;

  LG_RendererFormat format;
};

static bool         lgd_h264_create         (void ** opaque);
static void         lgd_h264_destroy        (void  * opaque);
static bool         lgd_h264_initialize     (void  * opaque, const LG_RendererFormat format);
static void         lgd_h264_deinitialize   (void  * opaque);
static LG_OutFormat lgd_h264_get_out_format (void  * opaque);
static unsigned int lgd_h264_get_frame_pitch(void  * opaque);
static bool         lgd_h264_decode(void * opaque, uint8_t * dst, size_t dstSize, const uint8_t * src, size_t srcSize);

static bool lgd_h264_create(void ** opaque)
{
  // create our local storage
  *opaque = malloc(sizeof(struct Inst));
  if (!*opaque)
  {
    DEBUG_INFO("Failed to allocate %lu bytes", sizeof(struct Inst));
    return false;
  }
  memset(*opaque, 0, sizeof(struct Inst));

  //struct Inst * this = (struct Inst *)*opaque;

  return true;
}

static void lgd_h264_destroy(void * opaque)
{
  struct Inst * this = (struct Inst *)opaque;
  lgd_h264_deinitialize(opaque);
  free(this);
}

static bool lgd_h264_initialize(void * opaque, const LG_RendererFormat format)
{
  struct Inst * this = (struct Inst *)opaque;
  if (this->initialized)
    lgd_h264_deinitialize(opaque);

  memcpy(&this->format, &format, sizeof(LG_RendererFormat));
  return true;
}

static void lgd_h264_deinitialize(void * opaque)
{
  struct Inst * this = (struct Inst *)opaque;
  if (!this->initialized)
    return;

  memset(this, 0, sizeof(struct Inst));
}

static LG_OutFormat lgd_h264_get_out_format(void * opaque)
{
  return LG_OUTPUT_BGRA;
}

static unsigned int lgd_h264_get_frame_pitch(void * opaque)
{
  struct Inst * this = (struct Inst *)opaque;
  return this->format.width * 4;
}

static bool lgd_h264_decode(void * opaque, uint8_t * dst, size_t dstSize, const uint8_t * src, size_t srcSize)
{
  return true;
}

const LG_Decoder LGD_H264 =
{
  .name            = "H.264",
  .create          = lgd_h264_create,
  .destroy         = lgd_h264_destroy,
  .initialize      = lgd_h264_initialize,
  .deinitialize    = lgd_h264_deinitialize,
  .get_out_format  = lgd_h264_get_out_format,
  .get_frame_pitch = lgd_h264_get_frame_pitch,
  .decode          = lgd_h264_decode
};