shithub: openh264

ref: 92e48ba2dfef47ee79f49d0e6f99a8de6b0a9f5d
dir: /codec/console/enc/src/bundlewelsenc.cpp/

/*!
 * \copy
 *     Copyright (c)  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.
 *
 */
#include <string.h>
#include <Carbon/Carbon.h>
#include <CoreFoundation/CFBundle.h>

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

#include "bundleloader.h"
#include "codec_api.h"

typedef long (*LPCreateWelsCSEncoder) (ISVCEncoder** ppEncoder);
typedef void (*LPDestroyWelsCSEncoder) (ISVCEncoder* pEncoder);

CFBundleRef g_at264Module = nil;

const char H264EncoderDLL[] = "welsenc.bundle";

int WelsEncGetCurrentModulePath (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);

  int locateNumber = 1;

  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;

}

int32_t WelsEncBundleLoad() {

  char achPath[512] = {0};

  WelsEncGetCurrentModulePath (achPath, 512);
  strlcat (achPath, H264EncoderDLL, 512);

  g_at264Module = LoadBundle (achPath);

  if (g_at264Module == NULL)
    return 1;
  else
    return 0;
}

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

int32_t WelsEncBundleCreateEncoder (ISVCEncoder** ppEncoder) {
  if (!g_at264Module)
    return 1;

  LPCreateWelsCSEncoder pfuncCreateCSEnc =
    (LPCreateWelsCSEncoder)GetProcessAddress (g_at264Module, "CreateSVCEncoder");

  if (pfuncCreateCSEnc != NULL) {
    return (pfuncCreateCSEnc (ppEncoder));
  }

  return 1;
}

int32_t WelsEncBundleDestroyEncoder (ISVCEncoder* pEncoder) {
  if (!g_at264Module)
    return 1;

  LPDestroyWelsCSEncoder pfuncDestroyCSEnc =
    (LPDestroyWelsCSEncoder)GetProcessAddress (g_at264Module, "DestroySVCEncoder");

  if (pfuncDestroyCSEnc != NULL) {
    pfuncDestroyCSEnc (pEncoder);
    return 0;
  } else
    return 1;
}