path: root/src/lib/ffmpeg-1.1/libavutil/cpu.pas

(*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * This is a part of the Pascal port of ffmpeg.
 * - Changes and updates by the UltraStar Deluxe Team
 *
 * Conversion of libavutil/cpu.h
 * avutil version 52.13.100
 *
 *)

(**
 * @file
 * CPU specific
 *)

const

  AV_CPU_FLAG_FORCE         = $80000000; (* force usage of selected flags (OR) *)

    (* lower 16 bits - CPU features *)
  AV_CPU_FLAG_MMX           = $0001;     ///< standard MMX
  AV_CPU_FLAG_MMXEXT        = $0002;     ///< SSE integer functions or AMD MMX ext
  AV_CPU_FLAG_MMX2          = $0002;     ///< SSE integer functions or AMD MMX ext
  AV_CPU_FLAG_3DNOW         = $0004;     ///< AMD 3DNOW
  AV_CPU_FLAG_SSE           = $0008;     ///< SSE functions
  AV_CPU_FLAG_SSE2          = $0010;     ///< PIV SSE2 functions
  AV_CPU_FLAG_SSE2SLOW      = $40000000; ///< SSE2 supported, but usually not faster
  AV_CPU_FLAG_3DNOWEXT      = $0020;     ///< AMD 3DNowExt
  AV_CPU_FLAG_SSE3          = $0040;     ///< Prescott SSE3 functions
  AV_CPU_FLAG_SSE3SLOW      = $20000000; ///< SSE3 supported, but usually not faster
  AV_CPU_FLAG_SSSE3         = $0080;     ///< Conroe SSSE3 functions
  AV_CPU_FLAG_ATOM          = $10000000; ///< Atom processor, some SSSE3 instructions are slower
  AV_CPU_FLAG_SSE4          = $0100;     ///< Penryn SSE4.1 functions
  AV_CPU_FLAG_SSE42         = $0200;     ///< Nehalem SSE4.2 functions
  AV_CPU_FLAG_AVX           = $4000;     ///< AVX functions: requires OS support even if YMM registers aren't used
  AV_CPU_FLAG_XOP           = $0400;     ///< Bulldozer XOP functions
  AV_CPU_FLAG_FMA4          = $0800;     ///< Bulldozer FMA4 functions
 
  AV_CPU_FLAG_CMOV          = $1001000;  ///< supports cmov instruction
  
  AV_CPU_FLAG_ALTIVEC       = $0001;     ///< standard

  AV_CPU_FLAG_ARMV5TE       = (1 << 0);
  AV_CPU_FLAG_ARMV6         = (1 << 1);
  AV_CPU_FLAG_ARMV6T2       = (1 << 2);
  AV_CPU_FLAG_VFP           = (1 << 3);
  AV_CPU_FLAG_VFPV3         = (1 << 4);
  AV_CPU_FLAG_NEON          = (1 << 5);

(**
 * Return the flags which specify extensions supported by the CPU.
 * The returned value is affected by av_force_cpu_flags() if that was used
 * before. So av_get_cpu_flags() can easily be used in a application to
 * detect the enabled cpu flags.
 *)
function av_get_cpu_flags(): cint;
  cdecl; external av__util;

(**
 * Disables cpu detection and forces the specified flags.
 * -1 is a special case that disables forcing of specific flags.
 *)
procedure av_force_cpu_flags(flags: cint);
  cdecl; external av__util;

(**
 * Set a mask on flags returned by av_get_cpu_flags().
 * This function is mainly useful for testing.
 * Please use av_force_cpu_flags() and av_get_cpu_flags() instead which are more flexible
 *
 * @warning this function is not thread safe.
 *)
procedure av_set_cpu_flags_mask(mask: cint);
  cdecl; external av__util; deprecated;

(**
 * Parse CPU flags from a string.
 *
 * The returned flags contain the specified flags as well as related unspecified flags.
 *
 * This function exists only for compatibility with libav.
 * Please use av_parse_cpu_caps() when possible.
 * @return a combination of AV_CPU_* flags, negative on error.
 *)
function av_parse_cpu_flags(s: {const} PAnsiChar): cint;
  cdecl; external av__util; deprecated;

(**
 * Parse CPU caps from a string and update the given AV_CPU_* flags based on that.
 *
 * @return negative on error.
 *)
function av_parse_cpu_caps(flags: Pcuint, s: {const} PAnsiChar): cint;
  cdecl; external av__util;

(* The following CPU-specific functions shall not be called directly. *)
function ff_get_cpu_flags_arm(): cint;
  cdecl; external av__util;
function ff_get_cpu_flags_ppc(): cint;
  cdecl; external av__util;
function ff_get_cpu_flags_x86(): cint;
  cdecl; external av__util;