1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17//#define LOG_NDEBUG 0 18#define LOG_TAG "TestPlayerStub" 19#include "utils/Log.h" 20 21#include "TestPlayerStub.h" 22 23#include <dlfcn.h> // for dlopen/dlclose 24#include <stdlib.h> 25#include <string.h> 26#include <cutils/properties.h> 27#include <utils/Errors.h> // for status_t 28 29#include "media/MediaPlayerInterface.h" 30 31 32namespace { 33using android::status_t; 34using android::MediaPlayerBase; 35 36const char *kTestUrlScheme = "test:"; 37const char *kUrlParam = "url="; 38 39const char *kBuildTypePropName = "ro.build.type"; 40const char *kEngBuild = "eng"; 41const char *kTestBuild = "test"; 42 43// @return true if the current build is 'eng' or 'test'. 44bool isTestBuild() 45{ 46 char prop[PROPERTY_VALUE_MAX] = { '\0', }; 47 48 property_get(kBuildTypePropName, prop, '\0'); 49 return strcmp(prop, kEngBuild) == 0 || strcmp(prop, kTestBuild) == 0; 50} 51 52// @return true if the url scheme is 'test:' 53bool isTestUrl(const char *url) 54{ 55 return url && strncmp(url, kTestUrlScheme, strlen(kTestUrlScheme)) == 0; 56} 57 58} // anonymous namespace 59 60namespace android { 61 62TestPlayerStub::TestPlayerStub() 63 :mUrl(NULL), mFilename(NULL), mContentUrl(NULL), 64 mHandle(NULL), mNewPlayer(NULL), mDeletePlayer(NULL), 65 mPlayer(NULL) { } 66 67TestPlayerStub::~TestPlayerStub() 68{ 69 resetInternal(); 70} 71 72status_t TestPlayerStub::initCheck() 73{ 74 return isTestBuild() ? OK : INVALID_OPERATION; 75} 76 77// Parse mUrl to get: 78// * The library to be dlopened. 79// * The url to be passed to the real setDataSource impl. 80// 81// mUrl is expected to be in following format: 82// 83// test:<name of the .so>?url=<url for setDataSource> 84// 85// The value of the url parameter is treated as a string (no 86// unescaping of illegal charaters). 87status_t TestPlayerStub::parseUrl() 88{ 89 if (strlen(mUrl) < strlen(kTestUrlScheme)) { 90 resetInternal(); 91 return BAD_VALUE; 92 } 93 94 char *i = mUrl + strlen(kTestUrlScheme); 95 96 mFilename = i; 97 98 while (*i != '\0' && *i != '?') { 99 ++i; 100 } 101 102 if (*i == '\0' || strncmp(i + 1, kUrlParam, strlen(kUrlParam)) != 0) { 103 resetInternal(); 104 return BAD_VALUE; 105 } 106 *i = '\0'; // replace '?' to nul-terminate mFilename 107 108 mContentUrl = i + 1 + strlen(kUrlParam); 109 return OK; 110} 111 112// Load the dynamic library. 113// Create the test player. 114// Call setDataSource on the test player with the url in param. 115status_t TestPlayerStub::setDataSource( 116 const char *url, const KeyedVector<String8, String8> *headers) { 117 if (!isTestUrl(url) || NULL != mHandle) { 118 return INVALID_OPERATION; 119 } 120 121 mUrl = strdup(url); 122 123 status_t status = parseUrl(); 124 125 if (OK != status) { 126 resetInternal(); 127 return status; 128 } 129 130 ::dlerror(); // Clears any pending error. 131 132 // Load the test player from the url. dlopen will fail if the lib 133 // is not there. dls are under /system/lib 134 // None of the entry points should be NULL. 135 mHandle = ::dlopen(mFilename, RTLD_NOW | RTLD_GLOBAL); 136 if (!mHandle) { 137 LOGE("dlopen failed: %s", ::dlerror()); 138 resetInternal(); 139 return UNKNOWN_ERROR; 140 } 141 142 // Load the 2 entry points to create and delete instances. 143 const char *err; 144 mNewPlayer = reinterpret_cast<NEW_PLAYER>(dlsym(mHandle, 145 "newPlayer")); 146 err = ::dlerror(); 147 if (err || mNewPlayer == NULL) { 148 // if err is NULL the string <null> is inserted in the logs => 149 // mNewPlayer was NULL. 150 LOGE("dlsym for newPlayer failed %s", err); 151 resetInternal(); 152 return UNKNOWN_ERROR; 153 } 154 155 mDeletePlayer = reinterpret_cast<DELETE_PLAYER>(dlsym(mHandle, 156 "deletePlayer")); 157 err = ::dlerror(); 158 if (err || mDeletePlayer == NULL) { 159 LOGE("dlsym for deletePlayer failed %s", err); 160 resetInternal(); 161 return UNKNOWN_ERROR; 162 } 163 164 mPlayer = (*mNewPlayer)(); 165 return mPlayer->setDataSource(mContentUrl, headers); 166} 167 168// Internal cleanup. 169status_t TestPlayerStub::resetInternal() 170{ 171 if(mUrl) { 172 free(mUrl); 173 mUrl = NULL; 174 } 175 mFilename = NULL; 176 mContentUrl = NULL; 177 178 if (mPlayer) { 179 LOG_ASSERT(mDeletePlayer != NULL, "mDeletePlayer is null"); 180 (*mDeletePlayer)(mPlayer); 181 mPlayer = NULL; 182 } 183 184 if (mHandle) { 185 ::dlclose(mHandle); 186 mHandle = NULL; 187 } 188 return OK; 189} 190 191/* static */ bool TestPlayerStub::canBeUsed(const char *url) 192{ 193 return isTestBuild() && isTestUrl(url); 194} 195 196} // namespace android 197