godot/thirdparty/libtheora/decinfo.c

/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE.   *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
 *                                                                  *
 * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009                *
 * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
 *                                                                  *
 ********************************************************************

  function:
    last mod: $Id$

 ********************************************************************/

#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "decint.h"

/*Only used for fuzzing.*/
#if defined(HAVE_MEMORY_CONSTRAINT)
static const int MAX_FUZZING_WIDTH = 16384;
static const int MAX_FUZZING_HEIGHT = 16384;
#endif


/*Unpacks a series of octets from a given byte array into the pack buffer.
  No checking is done to ensure the buffer contains enough data.
  _opb: The pack buffer to read the octets from.
  _buf: The byte array to store the unpacked bytes in.
  _len: The number of octets to unpack.*/
static void oc_unpack_octets(oc_pack_buf *_opb,char *_buf,size_t _len){ … }

/*Unpacks a 32-bit integer encoded by octets in little-endian form.*/
static long oc_unpack_length(oc_pack_buf *_opb){ … }

static int oc_info_unpack(oc_pack_buf *_opb,th_info *_info){ … }

static int oc_comment_unpack(oc_pack_buf *_opb,th_comment *_tc){ … }

static int oc_setup_unpack(oc_pack_buf *_opb,th_setup_info *_setup){ … }

static void oc_setup_clear(th_setup_info *_setup){ … }

static int oc_dec_headerin(oc_pack_buf *_opb,th_info *_info,
 th_comment *_tc,th_setup_info **_setup,ogg_packet *_op){ … }


/*Decodes one header packet.
  This should be called repeatedly with the packets at the beginning of the
   stream until it returns 0.*/
int th_decode_headerin(th_info *_info,th_comment *_tc,
 th_setup_info **_setup,ogg_packet *_op){ … }

void th_setup_free(th_setup_info *_setup){ … }