211 lines
6.8 KiB
C
211 lines
6.8 KiB
C
/* Quicktime muxer plugin for GStreamer
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* Copyright (C) 2008 Thiago Sousa Santos <thiagoss@embedded.ufcg.edu.br>
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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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/*
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* Unless otherwise indicated, Source Code is licensed under MIT license.
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* See further explanation attached in License Statement (distributed in the file
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* LICENSE).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "properties.h"
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/* if needed, re-allocate buffer to ensure size bytes can be written into it
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* at offset */
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void
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prop_copy_ensure_buffer (guint8 ** buffer, guint64 * bsize, guint64 * offset,
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guint64 size)
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{
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if (buffer && *bsize - *offset < size) {
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*bsize += size + 10 * 1024;
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*buffer = g_realloc (*buffer, *bsize);
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}
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}
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static guint64
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copy_func (void *prop, guint size, guint8 ** buffer, guint64 * bsize,
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guint64 * offset)
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{
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if (buffer) {
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prop_copy_ensure_buffer (buffer, bsize, offset, size);
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memcpy (*buffer + *offset, prop, size);
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}
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*offset += size;
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return size;
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}
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#define INT_ARRAY_COPY_FUNC_FAST(name, datatype) \
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guint64 prop_copy_ ## name ## _array (datatype *prop, guint size, \
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guint8 ** buffer, guint64 * bsize, guint64 * offset) { \
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return copy_func (prop, sizeof (datatype) * size, buffer, bsize, offset);\
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}
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#define INT_ARRAY_COPY_FUNC(name, datatype) \
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guint64 prop_copy_ ## name ## _array (datatype *prop, guint size, \
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guint8 ** buffer, guint64 * bsize, guint64 * offset) { \
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guint i; \
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\
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for (i = 0; i < size; i++) { \
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prop_copy_ ## name (prop[i], buffer, bsize, offset); \
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} \
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return sizeof (datatype) * size; \
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}
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/* INTEGERS */
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guint64
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prop_copy_uint8 (guint8 prop, guint8 ** buffer, guint64 * size,
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guint64 * offset)
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{
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return copy_func (&prop, sizeof (guint8), buffer, size, offset);
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}
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guint64
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prop_copy_uint16 (guint16 prop, guint8 ** buffer, guint64 * size,
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guint64 * offset)
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{
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prop = GUINT16_TO_BE (prop);
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return copy_func (&prop, sizeof (guint16), buffer, size, offset);
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}
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guint64
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prop_copy_uint32 (guint32 prop, guint8 ** buffer, guint64 * size,
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guint64 * offset)
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{
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prop = GUINT32_TO_BE (prop);
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return copy_func (&prop, sizeof (guint32), buffer, size, offset);
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}
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guint64
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prop_copy_uint64 (guint64 prop, guint8 ** buffer, guint64 * size,
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guint64 * offset)
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{
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prop = GUINT64_TO_BE (prop);
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return copy_func (&prop, sizeof (guint64), buffer, size, offset);
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}
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guint64
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prop_copy_int32 (gint32 prop, guint8 ** buffer, guint64 * size,
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guint64 * offset)
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{
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prop = GINT32_TO_BE (prop);
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return copy_func (&prop, sizeof (guint32), buffer, size, offset);
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}
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/* uint8 can use direct copy in any case, and may be used for large quantity */
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INT_ARRAY_COPY_FUNC_FAST (uint8, guint8);
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/* not used in large quantity anyway */
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INT_ARRAY_COPY_FUNC (uint16, guint16);
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INT_ARRAY_COPY_FUNC (uint32, guint32);
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INT_ARRAY_COPY_FUNC (uint64, guint64);
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/* FOURCC */
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guint64
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prop_copy_fourcc (guint32 prop, guint8 ** buffer, guint64 * size,
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guint64 * offset)
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{
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prop = GINT32_TO_LE (prop);
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return copy_func (&prop, sizeof (guint32), buffer, size, offset);
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}
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INT_ARRAY_COPY_FUNC (fourcc, guint32);
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/**
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* prop_copy_fixed_size_string:
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* @string: the string to be copied
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* @str_size: size of the string
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* @buffer: the array to copy the string to
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* @offset: the position in the buffer array.
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* This value is updated to the point right after the copied string.
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*
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* Copies a string of bytes without placing its size at the beginning.
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*
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* Returns: the number of bytes copied
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*/
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guint64
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prop_copy_fixed_size_string (guint8 * string, guint str_size, guint8 ** buffer,
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guint64 * size, guint64 * offset)
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{
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return copy_func (string, str_size * sizeof (guint8), buffer, size, offset);
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}
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/**
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* prop_copy_size_string:
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*
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* @string: the string to be copied
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* @str_size: size of the string
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* @buffer: the array to copy the string to
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* @offset: the position in the buffer array.
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* This value is updated to the point right after the copied string.
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*
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* Copies a string and its size to an array. Example:
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* string = 'abc\0'
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* result in the array: [3][a][b][c] (each [x] represents a position)
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*
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* Returns: the number of bytes copied
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*/
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guint64
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prop_copy_size_string (guint8 * string, guint str_size, guint8 ** buffer,
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guint64 * size, guint64 * offset)
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{
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guint64 original_offset = *offset;
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prop_copy_uint8 (str_size, buffer, size, offset);
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prop_copy_fixed_size_string (string, str_size, buffer, size, offset);
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return *offset - original_offset;
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}
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/**
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* prop_copy_null_terminated_string:
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* @string: the string to be copied
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* @buffer: the array to copy the string to
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* @offset: the position in the buffer array.
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* This value is updated to the point right after the copied string.
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*
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* Copies a string including its null terminating char to an array.
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*
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* Returns: the number of bytes copied
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*/
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guint64
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prop_copy_null_terminated_string (gchar * string, guint8 ** buffer,
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guint64 * size, guint64 * offset)
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{
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guint64 original_offset = *offset;
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guint len = strlen (string);
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prop_copy_fixed_size_string ((guint8 *) string, len, buffer, size, offset);
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prop_copy_uint8 ('\0', buffer, size, offset);
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return *offset - original_offset;
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}
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