/* Quicktime muxer plugin for GStreamer

 * Copyright (C) 2008 Thiago Sousa Santos <thiagoss@embedded.ufcg.edu.br>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

/*

 * Unless otherwise indicated, Source Code is licensed under MIT license.

 * See further explanation attached in License Statement (distributed in the file

 * LICENSE).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy of

 * this software and associated documentation files (the "Software"), to deal in

 * the Software without restriction, including without limitation the rights to

 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies

 * of the Software, and to permit persons to whom the Software is furnished to do

 * so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in all

 * copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */

#include "properties.h"

/* if needed, re-allocate buffer to ensure size bytes can be written into it

 * at offset */

void

prop_copy_ensure_buffer (guint8 ** buffer, guint64 * bsize, guint64 * offset,

    guint64 size)

{

  if (buffer && *bsize - *offset < size) {

    *bsize += size + 10 * 1024;

    *buffer = g_realloc (*buffer, *bsize);

  }

}

static guint64

copy_func (void *prop, guint size, guint8 ** buffer, guint64 * bsize,

    guint64 * offset)

{

  if (buffer) {

    prop_copy_ensure_buffer (buffer, bsize, offset, size);

    memcpy (*buffer + *offset, prop, size);

  }

  *offset += size;

  return size;

}

#define INT_ARRAY_COPY_FUNC_FAST(name, datatype) 			\

guint64 prop_copy_ ## name ## _array (datatype *prop, guint size,	\

    guint8 ** buffer, guint64 * bsize, guint64 * offset) { 		\

  return copy_func (prop, sizeof (datatype) * size, buffer, bsize, offset);\

}

#define INT_ARRAY_COPY_FUNC(name, datatype) 				\

guint64 prop_copy_ ## name ## _array (datatype *prop, guint size,	\

    guint8 ** buffer, guint64 * bsize, guint64 * offset) { 		\

  guint i;								\

									\

  for (i = 0; i < size; i++) {						\

    prop_copy_ ## name (prop[i], buffer, bsize, offset);		\

  }									\

  return sizeof (datatype) * size;					\

}

/* INTEGERS */

guint64

prop_copy_uint8 (guint8 prop, guint8 ** buffer, guint64 * size,

    guint64 * offset)

{

  return copy_func (&prop, sizeof (guint8), buffer, size, offset);

}

guint64

prop_copy_uint16 (guint16 prop, guint8 ** buffer, guint64 * size,

    guint64 * offset)

{

  prop = GUINT16_TO_BE (prop);

  return copy_func (&prop, sizeof (guint16), buffer, size, offset);

}

guint64

prop_copy_uint32 (guint32 prop, guint8 ** buffer, guint64 * size,

    guint64 * offset)

{

  prop = GUINT32_TO_BE (prop);

  return copy_func (&prop, sizeof (guint32), buffer, size, offset);

}

guint64

prop_copy_uint64 (guint64 prop, guint8 ** buffer, guint64 * size,

    guint64 * offset)

{

  prop = GUINT64_TO_BE (prop);

  return copy_func (&prop, sizeof (guint64), buffer, size, offset);

}

guint64

prop_copy_int32 (gint32 prop, guint8 ** buffer, guint64 * size,

    guint64 * offset)

{

  prop = GINT32_TO_BE (prop);

  return copy_func (&prop, sizeof (guint32), buffer, size, offset);

}

/* uint8 can use direct copy in any case, and may be used for large quantity */

INT_ARRAY_COPY_FUNC_FAST (uint8, guint8);

/* not used in large quantity anyway */

INT_ARRAY_COPY_FUNC (uint16, guint16);

INT_ARRAY_COPY_FUNC (uint32, guint32);

INT_ARRAY_COPY_FUNC (uint64, guint64);

/* FOURCC */

guint64

prop_copy_fourcc (guint32 prop, guint8 ** buffer, guint64 * size,

    guint64 * offset)

{

  prop = GINT32_TO_LE (prop);

  return copy_func (&prop, sizeof (guint32), buffer, size, offset);

}

INT_ARRAY_COPY_FUNC (fourcc, guint32);

/**

 * Copies a string of bytes without placing its size at the beginning.

 *

 * @string: the string to be copied

 * @str_size: size of the string

 * @buffer: the array to copy the string to

 * @offset: the position in the buffer array.

 * This value is updated to the point right after the copied string.

 *

 * Returns: the number of bytes copied

 */

guint64

prop_copy_fixed_size_string (guint8 * string, guint str_size, guint8 ** buffer,

    guint64 * size, guint64 * offset)

{

  return copy_func (string, str_size * sizeof (guint8), buffer, size, offset);

}

/**

 * Copies a string and its size to an array. Example:

 * string = 'abc\0'

 * result in the array: [3][a][b][c]  (each [x] represents a position)

 *

 * @string: the string to be copied

 * @str_size: size of the string

 * @buffer: the array to copy the string to

 * @offset: the position in the buffer array.

 * This value is updated to the point right after the copied string.

 *

 * Returns: the number of bytes copied

 */

guint64

prop_copy_size_string (guint8 * string, guint str_size, guint8 ** buffer,

    guint64 * size, guint64 * offset)

{

  guint64 original_offset = *offset;

  prop_copy_uint8 (str_size, buffer, size, offset);

  prop_copy_fixed_size_string (string, str_size, buffer, size, offset);

  return *offset - original_offset;

}

/**

 * Copies a string including its null terminating char to an array.

 *

 * @string: the string to be copied

 * @buffer: the array to copy the string to

 * @offset: the position in the buffer array.

 * This value is updated to the point right after the copied string.

 *

 * Returns: the number of bytes copied

 */

guint64

prop_copy_null_terminated_string (gchar * string, guint8 ** buffer,

    guint64 * size, guint64 * offset)

{

  guint64 original_offset = *offset;

  guint len = strlen (string);

  prop_copy_fixed_size_string ((guint8 *) string, len, buffer, size, offset);

  prop_copy_uint8 ('\0', buffer, size, offset);

  return *offset - original_offset;

}