485 lines
15 KiB
C
485 lines
15 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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* 2002 Thomas Vander Stichele <thomas@apestaart.org>
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*
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* gstutils.h: Header for various utility functions
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#pragma once
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#include <glib.h>
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G_BEGIN_DECLS
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/* Define PUT and GET functions for unaligned memory */
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#define _FP_GET(__data, __idx, __size, __shift) \
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(((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift))
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#define _FP_PUT(__data, __idx, __size, __shift, __num) \
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(((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff)
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#ifndef __GTK_DOC_IGNORE__
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/**
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* FP_READ_UINT64_BE:
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* @data: memory location
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*
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* Read a 64 bit unsigned integer value in big endian format from the memory buffer.
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*/
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/**
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* FP_READ_UINT64_LE:
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* @data: memory location
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*
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* Read a 64 bit unsigned integer value in little endian format from the memory buffer.
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*/
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#define _FP_READ_UINT64_BE(data) (_FP_GET (data, 0, 64, 56) | \
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_FP_GET (data, 1, 64, 48) | \
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_FP_GET (data, 2, 64, 40) | \
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_FP_GET (data, 3, 64, 32) | \
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_FP_GET (data, 4, 64, 24) | \
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_FP_GET (data, 5, 64, 16) | \
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_FP_GET (data, 6, 64, 8) | \
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_FP_GET (data, 7, 64, 0))
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#define _FP_READ_UINT64_LE(data) (_FP_GET (data, 7, 64, 56) | \
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_FP_GET (data, 6, 64, 48) | \
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_FP_GET (data, 5, 64, 40) | \
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_FP_GET (data, 4, 64, 32) | \
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_FP_GET (data, 3, 64, 24) | \
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_FP_GET (data, 2, 64, 16) | \
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_FP_GET (data, 1, 64, 8) | \
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_FP_GET (data, 0, 64, 0))
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#define FP_READ_UINT64_BE(data) _fpi_slow_read64_be((const guint8 *)(data))
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static inline guint64 _fpi_slow_read64_be (const guint8 * data) {
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return _FP_READ_UINT64_BE (data);
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}
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#define FP_READ_UINT64_LE(data) _fpi_slow_read64_le((const guint8 *)(data))
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static inline guint64 _fpi_slow_read64_le (const guint8 * data) {
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return _FP_READ_UINT64_LE (data);
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}
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/**
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* FP_READ_UINT32_BE:
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* @data: memory location
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*
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* Read a 32 bit unsigned integer value in big endian format from the memory buffer.
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*/
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/**
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* FP_READ_UINT32_LE:
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* @data: memory location
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*
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* Read a 32 bit unsigned integer value in little endian format from the memory buffer.
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*/
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#define _FP_READ_UINT32_BE(data) (_FP_GET (data, 0, 32, 24) | \
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_FP_GET (data, 1, 32, 16) | \
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_FP_GET (data, 2, 32, 8) | \
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_FP_GET (data, 3, 32, 0))
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#define _FP_READ_UINT32_LE(data) (_FP_GET (data, 3, 32, 24) | \
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_FP_GET (data, 2, 32, 16) | \
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_FP_GET (data, 1, 32, 8) | \
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_FP_GET (data, 0, 32, 0))
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#define FP_READ_UINT32_BE(data) _fpi_slow_read32_be((const guint8 *)(data))
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static inline guint32 _fpi_slow_read32_be (const guint8 * data) {
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return _FP_READ_UINT32_BE (data);
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}
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#define FP_READ_UINT32_LE(data) _fpi_slow_read32_le((const guint8 *)(data))
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static inline guint32 _fpi_slow_read32_le (const guint8 * data) {
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return _FP_READ_UINT32_LE (data);
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}
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/**
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* FP_READ_UINT24_BE:
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* @data: memory location
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*
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* Read a 24 bit unsigned integer value in big endian format from the memory buffer.
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*/
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#define _FP_READ_UINT24_BE(data) (_FP_GET (data, 0, 32, 16) | \
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_FP_GET (data, 1, 32, 8) | \
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_FP_GET (data, 2, 32, 0))
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#define FP_READ_UINT24_BE(data) _fpi_slow_read24_be((const guint8 *)(data))
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static inline guint32 _fpi_slow_read24_be (const guint8 * data) {
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return _FP_READ_UINT24_BE (data);
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}
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/**
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* FP_READ_UINT24_LE:
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* @data: memory location
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*
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* Read a 24 bit unsigned integer value in little endian format from the memory buffer.
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*/
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#define _FP_READ_UINT24_LE(data) (_FP_GET (data, 2, 32, 16) | \
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_FP_GET (data, 1, 32, 8) | \
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_FP_GET (data, 0, 32, 0))
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#define FP_READ_UINT24_LE(data) _fpi_slow_read24_le((const guint8 *)(data))
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static inline guint32 _fpi_slow_read24_le (const guint8 * data) {
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return _FP_READ_UINT24_LE (data);
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}
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/**
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* FP_READ_UINT16_BE:
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* @data: memory location
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*
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* Read a 16 bit unsigned integer value in big endian format from the memory buffer.
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*/
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/**
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* FP_READ_UINT16_LE:
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* @data: memory location
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*
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* Read a 16 bit unsigned integer value in little endian format from the memory buffer.
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*/
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#define _FP_READ_UINT16_BE(data) (_FP_GET (data, 0, 16, 8) | \
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_FP_GET (data, 1, 16, 0))
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#define _FP_READ_UINT16_LE(data) (_FP_GET (data, 1, 16, 8) | \
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_FP_GET (data, 0, 16, 0))
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#define FP_READ_UINT16_BE(data) _fpi_slow_read16_be((const guint8 *)(data))
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static inline guint16 _fpi_slow_read16_be (const guint8 * data) {
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return _FP_READ_UINT16_BE (data);
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}
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#define FP_READ_UINT16_LE(data) _fpi_slow_read16_le((const guint8 *)(data))
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static inline guint16 _fpi_slow_read16_le (const guint8 * data) {
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return _FP_READ_UINT16_LE (data);
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}
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/**
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* FP_READ_UINT8:
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* @data: memory location
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*
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* Read an 8 bit unsigned integer value from the memory buffer.
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*/
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#define FP_READ_UINT8(data) (_FP_GET (data, 0, 8, 0))
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/**
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* FP_WRITE_UINT64_BE:
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* @data: memory location
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* @val: value to store
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*
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* Store a 64 bit unsigned integer value in big endian format into the memory buffer.
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*/
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/**
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* FP_WRITE_UINT64_LE:
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* @data: memory location
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* @val: value to store
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*
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* Store a 64 bit unsigned integer value in little endian format into the memory buffer.
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*/
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#define FP_WRITE_UINT64_BE(data,val) do { \
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gpointer __put_data = data; \
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guint64 __put_val = val; \
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_FP_PUT (__put_data, 0, 64, 56, __put_val); \
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_FP_PUT (__put_data, 1, 64, 48, __put_val); \
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_FP_PUT (__put_data, 2, 64, 40, __put_val); \
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_FP_PUT (__put_data, 3, 64, 32, __put_val); \
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_FP_PUT (__put_data, 4, 64, 24, __put_val); \
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_FP_PUT (__put_data, 5, 64, 16, __put_val); \
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_FP_PUT (__put_data, 6, 64, 8, __put_val); \
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_FP_PUT (__put_data, 7, 64, 0, __put_val); \
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} while (0)
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#define FP_WRITE_UINT64_LE(data,val) do { \
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gpointer __put_data = data; \
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guint64 __put_val = val; \
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_FP_PUT (__put_data, 0, 64, 0, __put_val); \
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_FP_PUT (__put_data, 1, 64, 8, __put_val); \
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_FP_PUT (__put_data, 2, 64, 16, __put_val); \
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_FP_PUT (__put_data, 3, 64, 24, __put_val); \
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_FP_PUT (__put_data, 4, 64, 32, __put_val); \
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_FP_PUT (__put_data, 5, 64, 40, __put_val); \
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_FP_PUT (__put_data, 6, 64, 48, __put_val); \
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_FP_PUT (__put_data, 7, 64, 56, __put_val); \
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} while (0)
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/**
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* FP_WRITE_UINT32_BE:
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* @data: memory location
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* @val: value to store
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*
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* Store a 32 bit unsigned integer value in big endian format into the memory buffer.
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*/
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/**
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* FP_WRITE_UINT32_LE:
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* @data: memory location
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* @val: value to store
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*
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* Store a 32 bit unsigned integer value in little endian format into the memory buffer.
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*/
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#define FP_WRITE_UINT32_BE(data,val) do { \
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gpointer __put_data = data; \
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guint32 __put_val = val; \
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_FP_PUT (__put_data, 0, 32, 24, __put_val); \
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_FP_PUT (__put_data, 1, 32, 16, __put_val); \
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_FP_PUT (__put_data, 2, 32, 8, __put_val); \
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_FP_PUT (__put_data, 3, 32, 0, __put_val); \
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} while (0)
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#define FP_WRITE_UINT32_LE(data,val) do { \
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gpointer __put_data = data; \
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guint32 __put_val = val; \
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_FP_PUT (__put_data, 0, 32, 0, __put_val); \
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_FP_PUT (__put_data, 1, 32, 8, __put_val); \
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_FP_PUT (__put_data, 2, 32, 16, __put_val); \
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_FP_PUT (__put_data, 3, 32, 24, __put_val); \
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} while (0)
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/**
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* FP_WRITE_UINT24_BE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 24 bit unsigned integer value in big endian format into the memory buffer.
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*/
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#define FP_WRITE_UINT24_BE(data, num) do { \
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gpointer __put_data = data; \
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guint32 __put_val = num; \
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_FP_PUT (__put_data, 0, 32, 16, __put_val); \
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_FP_PUT (__put_data, 1, 32, 8, __put_val); \
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_FP_PUT (__put_data, 2, 32, 0, __put_val); \
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} while (0)
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/**
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* FP_WRITE_UINT24_LE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 24 bit unsigned integer value in little endian format into the memory buffer.
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*/
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#define FP_WRITE_UINT24_LE(data, num) do { \
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gpointer __put_data = data; \
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guint32 __put_val = num; \
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_FP_PUT (__put_data, 0, 32, 0, __put_val); \
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_FP_PUT (__put_data, 1, 32, 8, __put_val); \
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_FP_PUT (__put_data, 2, 32, 16, __put_val); \
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} while (0)
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/**
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* FP_WRITE_UINT16_BE:
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* @data: memory location
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* @val: value to store
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*
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* Store a 16 bit unsigned integer value in big endian format into the memory buffer.
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*/
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/**
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* FP_WRITE_UINT16_LE:
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* @data: memory location
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* @val: value to store
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*
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* Store a 16 bit unsigned integer value in little endian format into the memory buffer.
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*/
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#define FP_WRITE_UINT16_BE(data,val) do { \
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gpointer __put_data = data; \
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guint16 __put_val = val; \
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_FP_PUT (__put_data, 0, 16, 8, __put_val); \
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_FP_PUT (__put_data, 1, 16, 0, __put_val); \
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} while (0)
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#define FP_WRITE_UINT16_LE(data,val) do { \
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gpointer __put_data = data; \
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guint16 __put_val = val; \
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_FP_PUT (__put_data, 0, 16, 0, __put_val); \
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_FP_PUT (__put_data, 1, 16, 8, __put_val); \
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} while (0)
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/**
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* FP_WRITE_UINT8:
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* @data: memory location
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* @num: value to store
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*
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* Store an 8 bit unsigned integer value into the memory buffer.
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*/
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#define FP_WRITE_UINT8(data, num) do { \
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_FP_PUT (data, 0, 8, 0, num); \
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} while (0)
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/* Float endianness conversion macros */
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/**
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* FP_READ_FLOAT_LE:
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* @data: memory location
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*
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* Read a 32 bit float value in little endian format from the memory buffer.
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*
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* Returns: The floating point value read from @data
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*/
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static inline gfloat
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FP_READ_FLOAT_LE(const guint8 *data)
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{
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union
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{
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guint32 i;
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gfloat f;
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} u;
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u.i = FP_READ_UINT32_LE (data);
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return u.f;
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}
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/**
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* FP_READ_FLOAT_BE:
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* @data: memory location
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*
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* Read a 32 bit float value in big endian format from the memory buffer.
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*
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* Returns: The floating point value read from @data
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*/
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static inline gfloat
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FP_READ_FLOAT_BE(const guint8 *data)
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{
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union
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{
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guint32 i;
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gfloat f;
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} u;
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u.i = FP_READ_UINT32_BE (data);
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return u.f;
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}
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/**
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* FP_READ_DOUBLE_LE:
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* @data: memory location
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*
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* Read a 64 bit double value in little endian format from the memory buffer.
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*
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* Returns: The double-precision floating point value read from @data
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*/
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static inline gdouble
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FP_READ_DOUBLE_LE(const guint8 *data)
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{
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union
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{
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guint64 i;
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gdouble d;
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} u;
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u.i = FP_READ_UINT64_LE (data);
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return u.d;
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}
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/**
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* FP_READ_DOUBLE_BE:
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* @data: memory location
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*
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* Read a 64 bit double value in big endian format from the memory buffer.
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*
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* Returns: The double-precision floating point value read from @data
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*/
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static inline gdouble
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FP_READ_DOUBLE_BE(const guint8 *data)
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{
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union
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{
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guint64 i;
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gdouble d;
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} u;
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u.i = FP_READ_UINT64_BE (data);
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return u.d;
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}
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/**
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* FP_WRITE_FLOAT_LE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 32 bit float value in little endian format into the memory buffer.
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*/
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static inline void
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FP_WRITE_FLOAT_LE(guint8 *data, gfloat num)
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{
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union
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{
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guint32 i;
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gfloat f;
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} u;
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u.f = num;
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FP_WRITE_UINT32_LE (data, u.i);
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}
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/**
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* FP_WRITE_FLOAT_BE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 32 bit float value in big endian format into the memory buffer.
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*/
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static inline void
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FP_WRITE_FLOAT_BE(guint8 *data, gfloat num)
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{
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union
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{
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guint32 i;
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gfloat f;
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} u;
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u.f = num;
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FP_WRITE_UINT32_BE (data, u.i);
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}
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/**
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* FP_WRITE_DOUBLE_LE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 64 bit double value in little endian format into the memory buffer.
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*/
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static inline void
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FP_WRITE_DOUBLE_LE(guint8 *data, gdouble num)
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{
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union
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{
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guint64 i;
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gdouble d;
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} u;
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u.d = num;
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FP_WRITE_UINT64_LE (data, u.i);
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}
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/**
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* FP_WRITE_DOUBLE_BE:
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* @data: memory location
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* @num: value to store
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*
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* Store a 64 bit double value in big endian format into the memory buffer.
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*/
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static inline void
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FP_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
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{
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union
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{
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guint64 i;
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gdouble d;
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} u;
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u.d = num;
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FP_WRITE_UINT64_BE (data, u.i);
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}
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G_END_DECLS
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#endif /* __GTK_DOC_IGNORE__ */
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