LookingGlass/client/decoders/null.c

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/*
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 "memcpySSE.h"
#include <stdlib.h>
#include <string.h>
struct Inst
{
LG_RendererFormat format;
const uint8_t * src;
};
static bool lgd_null_create (void ** opaque);
static void lgd_null_destroy (void * opaque);
static bool lgd_null_initialize (void * opaque, const LG_RendererFormat format, SDL_Window * window);
static void lgd_null_deinitialize (void * opaque);
static LG_OutFormat lgd_null_get_out_format (void * opaque);
static unsigned int lgd_null_get_frame_pitch (void * opaque);
static unsigned int lgd_null_get_frame_stride(void * opaque);
static bool lgd_null_decode (void * opaque, const uint8_t * src, size_t srcSize);
static const uint8_t * lgd_null_get_buffer (void * opaque);
static bool lgd_null_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));
return true;
}
static void lgd_null_destroy(void * opaque)
{
free(opaque);
}
static bool lgd_null_initialize(void * opaque, const LG_RendererFormat format, SDL_Window * window)
{
struct Inst * this = (struct Inst *)opaque;
memcpy(&this->format, &format, sizeof(LG_RendererFormat));
return true;
}
static void lgd_null_deinitialize(void * opaque)
{
struct Inst * this = (struct Inst *)opaque;
memset(this, 0, sizeof(struct Inst));
}
static LG_OutFormat lgd_null_get_out_format(void * opaque)
{
struct Inst * this = (struct Inst *)opaque;
switch(this->format.type)
{
case FRAME_TYPE_BGRA : return LG_OUTPUT_BGRA;
case FRAME_TYPE_RGBA : return LG_OUTPUT_RGBA;
case FRAME_TYPE_RGBA10: return LG_OUTPUT_RGBA10;
default:
DEBUG_ERROR("Unknown frame type");
return LG_OUTPUT_INVALID;
}
}
static unsigned int lgd_null_get_frame_pitch(void * opaque)
{
struct Inst * this = (struct Inst *)opaque;
return this->format.pitch;
}
static unsigned int lgd_null_get_frame_stride(void * opaque)
{
struct Inst * this = (struct Inst *)opaque;
return this->format.stride;
}
static bool lgd_null_decode(void * opaque, const uint8_t * src, size_t srcSize)
{
struct Inst * this = (struct Inst *)opaque;
this->src = src;
return true;
}
static const uint8_t * lgd_null_get_buffer(void * opaque)
{
struct Inst * this = (struct Inst *)opaque;
if (!this->src)
return NULL;
return this->src;
}
const LG_Decoder LGD_NULL =
{
.name = "NULL",
.create = lgd_null_create,
.destroy = lgd_null_destroy,
.initialize = lgd_null_initialize,
.deinitialize = lgd_null_deinitialize,
.get_out_format = lgd_null_get_out_format,
.get_frame_pitch = lgd_null_get_frame_pitch,
.get_frame_stride = lgd_null_get_frame_stride,
.decode = lgd_null_decode,
.get_buffer = lgd_null_get_buffer
};