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#include <fcntl.h>
27
28#include <media/stagefright/foundation/ADebug.h>
29
30namespace android {
31
32OMXMaster::OMXMaster()
33    : mVendorLibHandle(NULL) {
34
35    pid_t pid = getpid();
36    char filename[20];
37    snprintf(filename, sizeof(filename), "/proc/%d/comm", pid);
38    int fd = open(filename, O_RDONLY);
39    if (fd < 0) {
40      ALOGW("couldn't determine process name");
41      strlcpy(mProcessName, "<unknown>", sizeof(mProcessName));
42    } else {
43      ssize_t len = read(fd, mProcessName, sizeof(mProcessName));
44      if (len < 2) {
45        ALOGW("couldn't determine process name");
46        strlcpy(mProcessName, "<unknown>", sizeof(mProcessName));
47      } else {
48        // the name is newline terminated, so erase the newline
49        mProcessName[len - 1] = 0;
50      }
51      close(fd);
52    }
53
54    addVendorPlugin();
55    addPlugin(new SoftOMXPlugin);
56}
57
58OMXMaster::~OMXMaster() {
59    clearPlugins();
60
61    if (mVendorLibHandle != NULL) {
62        dlclose(mVendorLibHandle);
63        mVendorLibHandle = NULL;
64    }
65}
66
67void OMXMaster::addVendorPlugin() {
68    addPlugin("libstagefrighthw.so");
69}
70
71void OMXMaster::addPlugin(const char *libname) {
72    mVendorLibHandle = dlopen(libname, RTLD_NOW);
73
74    if (mVendorLibHandle == NULL) {
75        return;
76    }
77
78    typedef OMXPluginBase *(*CreateOMXPluginFunc)();
79    CreateOMXPluginFunc createOMXPlugin =
80        (CreateOMXPluginFunc)dlsym(
81                mVendorLibHandle, "createOMXPlugin");
82    if (!createOMXPlugin)
83        createOMXPlugin = (CreateOMXPluginFunc)dlsym(
84                mVendorLibHandle, "_ZN7android15createOMXPluginEv");
85
86    if (createOMXPlugin) {
87        addPlugin((*createOMXPlugin)());
88    }
89}
90
91void OMXMaster::addPlugin(OMXPluginBase *plugin) {
92    Mutex::Autolock autoLock(mLock);
93
94    mPlugins.push_back(plugin);
95
96    OMX_U32 index = 0;
97
98    char name[128];
99    OMX_ERRORTYPE err;
100    while ((err = plugin->enumerateComponents(
101                    name, sizeof(name), index++)) == OMX_ErrorNone) {
102        String8 name8(name);
103
104        if (mPluginByComponentName.indexOfKey(name8) >= 0) {
105            ALOGE("A component of name '%s' already exists, ignoring this one.",
106                 name8.string());
107
108            continue;
109        }
110
111        mPluginByComponentName.add(name8, plugin);
112    }
113
114    if (err != OMX_ErrorNoMore) {
115        ALOGE("OMX plugin failed w/ error 0x%08x after registering %zu "
116             "components", err, mPluginByComponentName.size());
117    }
118}
119
120void OMXMaster::clearPlugins() {
121    Mutex::Autolock autoLock(mLock);
122
123    typedef void (*DestroyOMXPluginFunc)(OMXPluginBase*);
124    DestroyOMXPluginFunc destroyOMXPlugin =
125        (DestroyOMXPluginFunc)dlsym(
126                mVendorLibHandle, "destroyOMXPlugin");
127
128    mPluginByComponentName.clear();
129
130    for (List<OMXPluginBase *>::iterator it = mPlugins.begin();
131            it != mPlugins.end(); ++it) {
132        if (destroyOMXPlugin)
133            destroyOMXPlugin(*it);
134        else
135            delete *it;
136        *it = NULL;
137    }
138
139    mPlugins.clear();
140}
141
142OMX_ERRORTYPE OMXMaster::makeComponentInstance(
143        const char *name,
144        const OMX_CALLBACKTYPE *callbacks,
145        OMX_PTR appData,
146        OMX_COMPONENTTYPE **component) {
147    ALOGI("makeComponentInstance(%s) in %s process", name, mProcessName);
148    Mutex::Autolock autoLock(mLock);
149
150    *component = NULL;
151
152    ssize_t index = mPluginByComponentName.indexOfKey(String8(name));
153
154    if (index < 0) {
155        return OMX_ErrorInvalidComponentName;
156    }
157
158    OMXPluginBase *plugin = mPluginByComponentName.valueAt(index);
159    OMX_ERRORTYPE err =
160        plugin->makeComponentInstance(name, callbacks, appData, component);
161
162    if (err != OMX_ErrorNone) {
163        return err;
164    }
165
166    mPluginByInstance.add(*component, plugin);
167
168    return err;
169}
170
171OMX_ERRORTYPE OMXMaster::destroyComponentInstance(
172        OMX_COMPONENTTYPE *component) {
173    Mutex::Autolock autoLock(mLock);
174
175    ssize_t index = mPluginByInstance.indexOfKey(component);
176
177    if (index < 0) {
178        return OMX_ErrorBadParameter;
179    }
180
181    OMXPluginBase *plugin = mPluginByInstance.valueAt(index);
182    mPluginByInstance.removeItemsAt(index);
183
184    return plugin->destroyComponentInstance(component);
185}
186
187OMX_ERRORTYPE OMXMaster::enumerateComponents(
188        OMX_STRING name,
189        size_t size,
190        OMX_U32 index) {
191    Mutex::Autolock autoLock(mLock);
192
193    size_t numComponents = mPluginByComponentName.size();
194
195    if (index >= numComponents) {
196        return OMX_ErrorNoMore;
197    }
198
199    const String8 &name8 = mPluginByComponentName.keyAt(index);
200
201    CHECK(size >= 1 + name8.size());
202    strcpy(name, name8.string());
203
204    return OMX_ErrorNone;
205}
206
207OMX_ERRORTYPE OMXMaster::getRolesOfComponent(
208        const char *name,
209        Vector<String8> *roles) {
210    Mutex::Autolock autoLock(mLock);
211
212    roles->clear();
213
214    ssize_t index = mPluginByComponentName.indexOfKey(String8(name));
215
216    if (index < 0) {
217        return OMX_ErrorInvalidComponentName;
218    }
219
220    OMXPluginBase *plugin = mPluginByComponentName.valueAt(index);
221    return plugin->getRolesOfComponent(name, roles);
222}
223
224}  // namespace android
225