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 "OMXMaster"
19#include <utils/Log.h>
20
21#include "OMXMaster.h"
22
23#include "SoftOMXPlugin.h"
24
25#include <dlfcn.h>
26
27#include <media/stagefright/foundation/ADebug.h>
28
29namespace android {
30
31OMXMaster::OMXMaster()
32    : mVendorLibHandle(NULL) {
33    addVendorPlugin();
34    addPlugin(new SoftOMXPlugin);
35}
36
37OMXMaster::~OMXMaster() {
38    clearPlugins();
39
40    if (mVendorLibHandle != NULL) {
41        dlclose(mVendorLibHandle);
42        mVendorLibHandle = NULL;
43    }
44}
45
46void OMXMaster::addVendorPlugin() {
47    addPlugin("libstagefrighthw.so");
48}
49
50void OMXMaster::addPlugin(const char *libname) {
51    mVendorLibHandle = dlopen(libname, RTLD_NOW);
52
53    if (mVendorLibHandle == NULL) {
54        return;
55    }
56
57    typedef OMXPluginBase *(*CreateOMXPluginFunc)();
58    CreateOMXPluginFunc createOMXPlugin =
59        (CreateOMXPluginFunc)dlsym(
60                mVendorLibHandle, "createOMXPlugin");
61    if (!createOMXPlugin)
62        createOMXPlugin = (CreateOMXPluginFunc)dlsym(
63                mVendorLibHandle, "_ZN7android15createOMXPluginEv");
64
65    if (createOMXPlugin) {
66        addPlugin((*createOMXPlugin)());
67    }
68}
69
70void OMXMaster::addPlugin(OMXPluginBase *plugin) {
71    Mutex::Autolock autoLock(mLock);
72
73    mPlugins.push_back(plugin);
74
75    OMX_U32 index = 0;
76
77    char name[128];
78    OMX_ERRORTYPE err;
79    while ((err = plugin->enumerateComponents(
80                    name, sizeof(name), index++)) == OMX_ErrorNone) {
81        String8 name8(name);
82
83        if (mPluginByComponentName.indexOfKey(name8) >= 0) {
84            ALOGE("A component of name '%s' already exists, ignoring this one.",
85                 name8.string());
86
87            continue;
88        }
89
90        mPluginByComponentName.add(name8, plugin);
91    }
92
93    if (err != OMX_ErrorNoMore) {
94        ALOGE("OMX plugin failed w/ error 0x%08x after registering %zu "
95             "components", err, mPluginByComponentName.size());
96    }
97}
98
99void OMXMaster::clearPlugins() {
100    Mutex::Autolock autoLock(mLock);
101
102    typedef void (*DestroyOMXPluginFunc)(OMXPluginBase*);
103    DestroyOMXPluginFunc destroyOMXPlugin =
104        (DestroyOMXPluginFunc)dlsym(
105                mVendorLibHandle, "destroyOMXPlugin");
106
107    mPluginByComponentName.clear();
108
109    for (List<OMXPluginBase *>::iterator it = mPlugins.begin();
110            it != mPlugins.end(); ++it) {
111        if (destroyOMXPlugin)
112            destroyOMXPlugin(*it);
113        else
114            delete *it;
115        *it = NULL;
116    }
117
118    mPlugins.clear();
119}
120
121OMX_ERRORTYPE OMXMaster::makeComponentInstance(
122        const char *name,
123        const OMX_CALLBACKTYPE *callbacks,
124        OMX_PTR appData,
125        OMX_COMPONENTTYPE **component) {
126    Mutex::Autolock autoLock(mLock);
127
128    *component = NULL;
129
130    ssize_t index = mPluginByComponentName.indexOfKey(String8(name));
131
132    if (index < 0) {
133        return OMX_ErrorInvalidComponentName;
134    }
135
136    OMXPluginBase *plugin = mPluginByComponentName.valueAt(index);
137    OMX_ERRORTYPE err =
138        plugin->makeComponentInstance(name, callbacks, appData, component);
139
140    if (err != OMX_ErrorNone) {
141        return err;
142    }
143
144    mPluginByInstance.add(*component, plugin);
145
146    return err;
147}
148
149OMX_ERRORTYPE OMXMaster::destroyComponentInstance(
150        OMX_COMPONENTTYPE *component) {
151    Mutex::Autolock autoLock(mLock);
152
153    ssize_t index = mPluginByInstance.indexOfKey(component);
154
155    if (index < 0) {
156        return OMX_ErrorBadParameter;
157    }
158
159    OMXPluginBase *plugin = mPluginByInstance.valueAt(index);
160    mPluginByInstance.removeItemsAt(index);
161
162    return plugin->destroyComponentInstance(component);
163}
164
165OMX_ERRORTYPE OMXMaster::enumerateComponents(
166        OMX_STRING name,
167        size_t size,
168        OMX_U32 index) {
169    Mutex::Autolock autoLock(mLock);
170
171    size_t numComponents = mPluginByComponentName.size();
172
173    if (index >= numComponents) {
174        return OMX_ErrorNoMore;
175    }
176
177    const String8 &name8 = mPluginByComponentName.keyAt(index);
178
179    CHECK(size >= 1 + name8.size());
180    strcpy(name, name8.string());
181
182    return OMX_ErrorNone;
183}
184
185OMX_ERRORTYPE OMXMaster::getRolesOfComponent(
186        const char *name,
187        Vector<String8> *roles) {
188    Mutex::Autolock autoLock(mLock);
189
190    roles->clear();
191
192    ssize_t index = mPluginByComponentName.indexOfKey(String8(name));
193
194    if (index < 0) {
195        return OMX_ErrorInvalidComponentName;
196    }
197
198    OMXPluginBase *plugin = mPluginByComponentName.valueAt(index);
199    return plugin->getRolesOfComponent(name, roles);
200}
201
202}  // namespace android
203