/******************************************************************************* multichannel.c libquicktime - A library for reading and writing quicktime/avi/mp4 files. http://libquicktime.sourceforge.net Copyright (C) 2002 Heroine Virtual Ltd. Copyright (C) 2002-2007 Members of the libquicktime project. This library 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. 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA*******************************************************************************/ /* Multichannel support for libquicktime.*/#include "lqt_private.h"#include <stdlib.h>#include <string.h>static struct  {  lqt_channel_t ch;  char * name;  }channels[] =  {    { LQT_CHANNEL_UNKNOWN,            "Unknown"     },    { LQT_CHANNEL_FRONT_LEFT,         "Front Left"  },    { LQT_CHANNEL_FRONT_RIGHT,        "Front Right" },    { LQT_CHANNEL_FRONT_CENTER,       "Front Center" },    { LQT_CHANNEL_FRONT_CENTER_LEFT,  "Front Center Left" },    { LQT_CHANNEL_FRONT_CENTER_RIGHT, "Front Center Right" },    { LQT_CHANNEL_BACK_LEFT,          "Back Left" },    { LQT_CHANNEL_BACK_RIGHT,         "Back Right" },    { LQT_CHANNEL_BACK_CENTER,        "Back Center" },    { LQT_CHANNEL_SIDE_LEFT,          "Side Left" },    { LQT_CHANNEL_SIDE_RIGHT,         "Side Right" },#if 0    { LQT_CHANNEL_TOP_FRONT_LEFT,     "Top Front Left" },    { LQT_CHANNEL_TOP_FRONT_RIGHT,    "Top Front Right" },    { LQT_CHANNEL_TOP_FRONT_CENTER,   "Top Front Center" },    { LQT_CHANNEL_TOP_BACK_LEFT,      "Top Back Left" },    { LQT_CHANNEL_TOP_BACK_RIGHT,     "Top Back Right" },    { LQT_CHANNEL_TOP_BACK_CENTER,    "Top Back Center" },#endif    { LQT_CHANNEL_LFE,                "LFE" }  };const char * lqt_channel_to_string(lqt_channel_t ch)  {  int i;  for(i = 0; i < sizeof(channels) / sizeof(channels[0]); i++)    {    if(channels[i].ch == ch)      return channels[i].name;    }  return channels[0].name;  }void lqt_set_channel_setup(quicktime_t * file, int track, lqt_channel_t * ch)  {  if(!file->atracks[track].channel_setup)    file->atracks[track].channel_setup = calloc(file->atracks[track].channels,                                                sizeof(*file->atracks[track].channel_setup));    memcpy(file->atracks[track].channel_setup, ch, sizeof(*ch)*file->atracks[track].channels);  quicktime_set_chan(&(file->atracks[track]));  }const lqt_channel_t * lqt_get_channel_setup(quicktime_t * file, int track)  {  if((track >= file->total_atracks) || (track < 0))    return (lqt_channel_t*)0;  return file->atracks[track].channel_setup;  }