gecko/gfx/ycbcr/ycbcr_to_rgb565.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Tom Brinkman <reportbase@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "ycbcr_to_rgb565.h"
//The logic for have_ycbcr_to_rgb565 is taken from pixman-cpu.c
#if !defined (HAVE_ARM_NEON)
int have_ycbcr_to_rgb565 ()
{
return 0;
}
#else
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <elf.h>
#ifdef ANDROID
int have_ycbcr_to_rgb565 ()
{
static int have_ycbcr_to_rgb565_initialized = 0;
static int arm_has_neon = 0;
if (!have_ycbcr_to_rgb565_initialized)
{
have_ycbcr_to_rgb565_initialized = 1;
char buf[1024];
const char* ver_token = "CPU architecture: ";
FILE* f = fopen("/proc/cpuinfo", "r");
if (!f) {
return 0;
}
fread(buf, sizeof(char), 1024, f);
arm_has_neon = strstr(buf, "neon") != NULL;
fclose(f);
}
return arm_has_neon;
}
#else
int have_ycbcr_to_rgb565 ()
{
static int have_ycbcr_to_rgb565_initialized = 0;
static int arm_has_neon = 0;
if (!have_ycbcr_to_rgb565_initialized)
{
have_ycbcr_to_rgb565_initialized = 1;
int fd;
Elf32_auxv_t aux;
fd = open ("/proc/self/auxv", O_RDONLY);
if (fd >= 0)
{
while (read (fd, &aux, sizeof(Elf32_auxv_t)) == sizeof(Elf32_auxv_t))
{
if (aux.a_type == AT_HWCAP)
{
uint32_t hwcap = aux.a_un.a_val;
arm_has_neon = (hwcap & 4096) != 0;
break;
}
}
close (fd);
}
}
return arm_has_neon;
}
#endif //ANDROID
#endif //_MSC_VER