NuPlayerDecoderBase.cpp revision 3b032b3865fd93173aadca0591eeea32853206f9 
1/*
2 * Copyright (C) 2010 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 "NuPlayerDecoderBase"
19#include <utils/Log.h>
20#include <inttypes.h>
21
22#include "NuPlayerDecoderBase.h"
23
24#include "NuPlayerRenderer.h"
25
26#include <media/stagefright/foundation/ADebug.h>
27#include <media/stagefright/foundation/AMessage.h>
28
29namespace android {
30
31NuPlayer::DecoderBase::DecoderBase(const sp<AMessage> &notify)
32    :  mNotify(notify),
33       mBufferGeneration(0),
34       mRequestInputBuffersPending(false) {
35    // Every decoder has its own looper because MediaCodec operations
36    // are blocking, but NuPlayer needs asynchronous operations.
37    mDecoderLooper = new ALooper;
38    mDecoderLooper->setName("NPDecoder");
39    mDecoderLooper->start(false, false, ANDROID_PRIORITY_AUDIO);
40}
41
42NuPlayer::DecoderBase::~DecoderBase() {
43    mDecoderLooper->unregisterHandler(id());
44    mDecoderLooper->stop();
45}
46
47static
48status_t PostAndAwaitResponse(
49        const sp<AMessage> &msg, sp<AMessage> *response) {
50    status_t err = msg->postAndAwaitResponse(response);
51
52    if (err != OK) {
53        return err;
54    }
55
56    if (!(*response)->findInt32("err", &err)) {
57        err = OK;
58    }
59
60    return err;
61}
62
63void NuPlayer::DecoderBase::configure(const sp<AMessage> &format) {
64    sp<AMessage> msg = new AMessage(kWhatConfigure, this);
65    msg->setMessage("format", format);
66    msg->post();
67}
68
69void NuPlayer::DecoderBase::init() {
70    mDecoderLooper->registerHandler(this);
71}
72
73void NuPlayer::DecoderBase::setRenderer(const sp<Renderer> &renderer) {
74    sp<AMessage> msg = new AMessage(kWhatSetRenderer, this);
75    msg->setObject("renderer", renderer);
76    msg->post();
77}
78
79status_t NuPlayer::DecoderBase::getInputBuffers(Vector<sp<ABuffer> > *buffers) const {
80    sp<AMessage> msg = new AMessage(kWhatGetInputBuffers, this);
81    msg->setPointer("buffers", buffers);
82
83    sp<AMessage> response;
84    return PostAndAwaitResponse(msg, &response);
85}
86
87void NuPlayer::DecoderBase::signalFlush() {
88    (new AMessage(kWhatFlush, this))->post();
89}
90
91void NuPlayer::DecoderBase::signalResume(bool notifyComplete) {
92    sp<AMessage> msg = new AMessage(kWhatResume, this);
93    msg->setInt32("notifyComplete", notifyComplete);
94    msg->post();
95}
96
97void NuPlayer::DecoderBase::initiateShutdown() {
98    (new AMessage(kWhatShutdown, this))->post();
99}
100
101void NuPlayer::DecoderBase::onRequestInputBuffers() {
102    if (mRequestInputBuffersPending) {
103        return;
104    }
105
106    // doRequestBuffers() return true if we should request more data
107    if (doRequestBuffers()) {
108        mRequestInputBuffersPending = true;
109
110        sp<AMessage> msg = new AMessage(kWhatRequestInputBuffers, this);
111        msg->post(10 * 1000ll);
112    }
113}
114
115void NuPlayer::DecoderBase::onMessageReceived(const sp<AMessage> &msg) {
116
117    switch (msg->what()) {
118        case kWhatConfigure:
119        {
120            sp<AMessage> format;
121            CHECK(msg->findMessage("format", &format));
122            onConfigure(format);
123            break;
124        }
125
126        case kWhatSetRenderer:
127        {
128            sp<RefBase> obj;
129            CHECK(msg->findObject("renderer", &obj));
130            onSetRenderer(static_cast<Renderer *>(obj.get()));
131            break;
132        }
133
134        case kWhatGetInputBuffers:
135        {
136            sp<AReplyToken> replyID;
137            CHECK(msg->senderAwaitsResponse(&replyID));
138
139            Vector<sp<ABuffer> > *dstBuffers;
140            CHECK(msg->findPointer("buffers", (void **)&dstBuffers));
141
142            onGetInputBuffers(dstBuffers);
143
144            (new AMessage)->postReply(replyID);
145            break;
146        }
147
148        case kWhatRequestInputBuffers:
149        {
150            mRequestInputBuffersPending = false;
151            onRequestInputBuffers();
152            break;
153        }
154
155        case kWhatFlush:
156        {
157            onFlush();
158            break;
159        }
160
161        case kWhatResume:
162        {
163            int32_t notifyComplete;
164            CHECK(msg->findInt32("notifyComplete", &notifyComplete));
165
166            onResume(notifyComplete);
167            break;
168        }
169
170        case kWhatShutdown:
171        {
172            onShutdown(true);
173            break;
174        }
175
176        default:
177            TRESPASS();
178            break;
179    }
180}
181
182void NuPlayer::DecoderBase::handleError(int32_t err)
183{
184    // We cannot immediately release the codec due to buffers still outstanding
185    // in the renderer.  We signal to the player the error so it can shutdown/release the
186    // decoder after flushing and increment the generation to discard unnecessary messages.
187
188    ++mBufferGeneration;
189
190    sp<AMessage> notify = mNotify->dup();
191    notify->setInt32("what", kWhatError);
192    notify->setInt32("err", err);
193    notify->post();
194}
195
196}  // namespace android
197
198