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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "TestPlayerStub"
#include "utils/Log.h"
#include "TestPlayerStub.h"
#include <dlfcn.h> // for dlopen/dlclose
#include <stdlib.h>
#include <string.h>
#include <cutils/properties.h>
#include <utils/Errors.h> // for status_t
#include "media/MediaPlayerInterface.h"
namespace {
using android::status_t;
using android::MediaPlayerBase;
const char *kTestUrlScheme = "test:";
const char *kUrlParam = "url=";
const char *kBuildTypePropName = "ro.build.type";
const char *kEngBuild = "eng";
const char *kTestBuild = "test";
// @return true if the current build is 'eng' or 'test'.
bool isTestBuild()
{
char prop[PROPERTY_VALUE_MAX] = { '\0', };
property_get(kBuildTypePropName, prop, '\0');
return strcmp(prop, kEngBuild) == 0 || strcmp(prop, kTestBuild) == 0;
}
// @return true if the url scheme is 'test:'
bool isTestUrl(const char *url)
{
return url && strncmp(url, kTestUrlScheme, strlen(kTestUrlScheme)) == 0;
}
} // anonymous namespace
namespace android {
TestPlayerStub::TestPlayerStub()
:mUrl(NULL), mFilename(NULL), mContentUrl(NULL),
mHandle(NULL), mNewPlayer(NULL), mDeletePlayer(NULL),
mPlayer(NULL) { }
TestPlayerStub::~TestPlayerStub()
{
resetInternal();
}
status_t TestPlayerStub::initCheck()
{
return isTestBuild() ? OK : INVALID_OPERATION;
}
// Parse mUrl to get:
// * The library to be dlopened.
// * The url to be passed to the real setDataSource impl.
//
// mUrl is expected to be in following format:
//
// test:<name of the .so>?url=<url for setDataSource>
//
// The value of the url parameter is treated as a string (no
// unescaping of illegal charaters).
status_t TestPlayerStub::parseUrl()
{
if (strlen(mUrl) < strlen(kTestUrlScheme)) {
resetInternal();
return BAD_VALUE;
}
char *i = mUrl + strlen(kTestUrlScheme);
mFilename = i;
while (*i != '\0' && *i != '?') {
++i;
}
if (*i == '\0' || strncmp(i + 1, kUrlParam, strlen(kUrlParam)) != 0) {
resetInternal();
return BAD_VALUE;
}
*i = '\0'; // replace '?' to nul-terminate mFilename
mContentUrl = i + 1 + strlen(kUrlParam);
return OK;
}
// Load the dynamic library.
// Create the test player.
// Call setDataSource on the test player with the url in param.
status_t TestPlayerStub::setDataSource(
const sp<IMediaHTTPService> &httpService,
const char *url,
const KeyedVector<String8, String8> *headers) {
if (!isTestUrl(url) || NULL != mHandle) {
return INVALID_OPERATION;
}
mUrl = strdup(url);
status_t status = parseUrl();
if (OK != status) {
resetInternal();
return status;
}
::dlerror(); // Clears any pending error.
// Load the test player from the url. dlopen will fail if the lib
// is not there. dls are under /system/lib
// None of the entry points should be NULL.
mHandle = ::dlopen(mFilename, RTLD_NOW | RTLD_GLOBAL);
if (!mHandle) {
ALOGE("dlopen failed: %s", ::dlerror());
resetInternal();
return UNKNOWN_ERROR;
}
// Load the 2 entry points to create and delete instances.
const char *err;
mNewPlayer = reinterpret_cast<NEW_PLAYER>(dlsym(mHandle,
"newPlayer"));
err = ::dlerror();
if (err || mNewPlayer == NULL) {
// if err is NULL the string <null> is inserted in the logs =>
// mNewPlayer was NULL.
ALOGE("dlsym for newPlayer failed %s", err);
resetInternal();
return UNKNOWN_ERROR;
}
mDeletePlayer = reinterpret_cast<DELETE_PLAYER>(dlsym(mHandle,
"deletePlayer"));
err = ::dlerror();
if (err || mDeletePlayer == NULL) {
ALOGE("dlsym for deletePlayer failed %s", err);
resetInternal();
return UNKNOWN_ERROR;
}
mPlayer = (*mNewPlayer)();
return mPlayer->setDataSource(httpService, mContentUrl, headers);
}
// Internal cleanup.
status_t TestPlayerStub::resetInternal()
{
if(mUrl) {
free(mUrl);
mUrl = NULL;
}
mFilename = NULL;
mContentUrl = NULL;
if (mPlayer) {
ALOG_ASSERT(mDeletePlayer != NULL, "mDeletePlayer is null");
(*mDeletePlayer)(mPlayer);
mPlayer = NULL;
}
if (mHandle) {
::dlclose(mHandle);
mHandle = NULL;
}
return OK;
}
/* static */ bool TestPlayerStub::canBeUsed(const char *url)
{
return isTestBuild() && isTestUrl(url);
}
} // namespace android
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