shithub: openh264

ref: 26307c1263d2408e3dac06b8c766df75806d99d8
dir: /codec/console/dec/src/load_bundle_functions.cpp/

/*!
 * \copy
 *     Copyright (c)  2011-2013, Cisco Systems
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted provided that the following conditions
 *     are met:
 *
 *        * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions and the following disclaimer.
 *
 *        * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions and the following disclaimer in
 *          the documentation and/or other materials provided with the
 *          distribution.
 *
 *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *     COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 *     CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 *     ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *     POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * \file	load_bundle_functions.cpp
 *
 * \brief	load bundle and function on Mac platform
 *
 * \date	Created on 03/15/2011
 *
 * \description : 1. Load bundle: welsdec.bundle
 *                2. Load address of function
 *                3. Create or destroy decoder
 *
 *************************************************************************************
 */




#include <string.h>
#include <Carbon/Carbon.h>
#include <CoreFoundation/CFBundle.h>

#include <dlfcn.h>
#include <string>

#include "dec_console.h"
#include "codec_api.h"

typedef long (*LPCreateWelsCSDecoder) (ISVCDecoder** ppDecoder);
typedef void (*LPDestroyWelsCSDecoder) (ISVCDecoder* pDecoder);


typedef long (*LPCreateVHDController)();
typedef void (*LPDestroyVHDController)();

CFBundleRef g_at264Module = nil;

const char H264DecoderDLL[] = "welsdec.bundle";

CFBundleRef g_at264ModuleHWD = nil;


////////////////////////////////////////////////////////////////////////////////////////
int GetCurrentModulePath (char* lpModulePath, const int iPathMax) {
  if (lpModulePath == NULL || iPathMax <= 0) {
    return -1;
  }

  memset (lpModulePath, 0, iPathMax);

  char cCurrentPath[PATH_MAX];
  memset (cCurrentPath, 0, PATH_MAX);

  Dl_info 	dlInfo;
  static int  sDummy;
  dladdr ((void*)&sDummy, &dlInfo);

  strlcpy (cCurrentPath, dlInfo.dli_fname, PATH_MAX);

#if defined(__apple__)
  // whether is self a framework ?
  int locateNumber = 1;
  struct FSRef currentPath;
  OSStatus iStatus = FSPathMakeRef ((unsigned char*)cCurrentPath, &currentPath, NULL);
  if (noErr == iStatus) {
    LSItemInfoRecord  info;
    iStatus = LSCopyItemInfoForRef (&currentPath, kLSRequestExtension, &info);
    if (noErr == iStatus && NULL == info.extension) {
      locateNumber = 4;
    }
  }
#else
  int locateNumber = 1;
#endif

  std::string strPath (cCurrentPath);
  int pos = std::string::npos;
  for (int i = 0; i < locateNumber; i++) {
    pos = strPath.rfind ('/');
    if (std::string::npos == pos) {
      break;
    }
    strPath.erase (pos);
  }
  if (std::string::npos == pos) {
    return -2;
  }
  cCurrentPath[pos] = 0;

  strlcpy (lpModulePath, cCurrentPath, iPathMax);
  strlcat (lpModulePath, "/", iPathMax);

  return 0;
}

CFBundleRef LoadBundle (const char* lpBundlePath) {
  if (lpBundlePath == NULL) {
    return NULL;
  }

  CFStringRef bundlePath = CFStringCreateWithCString (kCFAllocatorSystemDefault, lpBundlePath,
                           CFStringGetSystemEncoding());
  if (NULL == bundlePath) {
    return NULL;
  }

  CFURLRef bundleURL = CFURLCreateWithString (kCFAllocatorSystemDefault, bundlePath, NULL);
  if (NULL == bundleURL) {
    return NULL;
  }
#endif

  // 2.get bundle ref
  CFBundleRef bundleRef = CFBundleCreate (kCFAllocatorSystemDefault, bundleURL);
  CFRelease (bundleURL);

  if (NULL != bundleRef) {
  }

  return bundleRef;
}

void* GetProcessAddress (CFBundleRef bundleRef, const char* lpProcName) {
  void* processAddress = NULL;
  if (NULL != bundleRef) {
    CFStringRef cfProcName = CFStringCreateWithCString (kCFAllocatorSystemDefault, lpProcName, CFStringGetSystemEncoding());
    processAddress = CFBundleGetFunctionPointerForName (bundleRef, cfProcName);
    CFRelease (cfProcName);
  }
  return processAddress;
}


////////////////////////

bool load_bundle_welsdec() {

  char achPath[512] = {0};

  GetCurrentModulePath (achPath, 512);
  strlcat (achPath, H264DecoderDLL, 512);

  g_at264Module = LoadBundle (achPath);

  if (g_at264Module == NULL)
    return false;

  return true;

}

void free_bundle_welsdec() {
  if (g_at264Module != NULL) {
    CFBundleUnloadExecutable (g_at264Module);
  }
}

bool get_functions_address_create_decoder (ISVCDecoder** ppDecoder) {
  if (!g_at264Module)
    return false;

  LPCreateWelsCSDecoder pfuncCreateSWDec =
    (LPCreateWelsCSDecoder)GetProcessAddress (g_at264Module, "CreateSVCDecoder");

  LPCreateVHDController pfuncCreateHWDec =
    (LPCreateVHDController)GetProcessAddress (g_at264Module, "CreateSVCVHDController");


  if (pfuncCreateSWDec != NULL) {
    pfuncCreateSWDec (ppDecoder);
  } else {
    return false;
  }

  if (pfuncCreateHWDec != NULL) {
    pfuncCreateHWDec();
  } else {
    return false;
  }

  return true;

}

bool get_functions_address_free_decoder (ISVCDecoder* pDecoder) {
  if (!g_at264Module)
    return false;

  LPDestroyWelsCSDecoder pfuncDestroySWDec =
    (LPDestroyWelsCSDecoder)GetProcessAddress (g_at264Module, "DestroySVCDecoder");

  LPDestroyVHDController pfuncDestroyHWDec =
    (LPDestroyVHDController)GetProcessAddress (g_at264Module, "DestroySVCVHDController");

  if (pfuncDestroySWDec != NULL) {
    pfuncDestroySWDec (pDecoder);
  } else {
    return false;
  }

  if (pfuncDestroyHWDec != NULL) {
    pfuncDestroyHWDec();
  } else {
    return false;
  }

  return true;
}