NuPlayerDecoder.cpp revision 0523da8f16557a85395da86ab76be6d8cb771da0 
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 "NuPlayerDecoder"
19#include <utils/Log.h>
20
21#include "NuPlayerDecoder.h"
22
23#include <media/stagefright/foundation/ABuffer.h>
24#include <media/stagefright/foundation/ADebug.h>
25#include <media/stagefright/foundation/AMessage.h>
26#include <media/stagefright/ACodec.h>
27#include <media/stagefright/MediaDefs.h>
28
29namespace android {
30
31NuPlayer::Decoder::Decoder(
32        const sp<AMessage> &notify,
33        const sp<NativeWindowWrapper> &nativeWindow)
34    : mNotify(notify),
35      mNativeWindow(nativeWindow) {
36}
37
38NuPlayer::Decoder::~Decoder() {
39}
40
41void NuPlayer::Decoder::configure(const sp<AMessage> &format) {
42    CHECK(mCodec == NULL);
43
44    AString mime;
45    CHECK(format->findString("mime", &mime));
46
47    sp<AMessage> notifyMsg =
48        new AMessage(kWhatCodecNotify, id());
49
50    mCSDIndex = 0;
51    for (size_t i = 0;; ++i) {
52        sp<ABuffer> csd;
53        if (!format->findBuffer(StringPrintf("csd-%d", i).c_str(), &csd)) {
54            break;
55        }
56
57        mCSD.push(csd);
58    }
59
60    if (mNativeWindow != NULL) {
61        format->setObject("native-window", mNativeWindow);
62    }
63
64    // Current video decoders do not return from OMX_FillThisBuffer
65    // quickly, violating the OpenMAX specs, until that is remedied
66    // we need to invest in an extra looper to free the main event
67    // queue.
68    bool needDedicatedLooper = !strncasecmp(mime.c_str(), "video/", 6);
69
70    mFormat = format;
71    mCodec = new ACodec;
72
73    if (needDedicatedLooper && mCodecLooper == NULL) {
74        mCodecLooper = new ALooper;
75        mCodecLooper->setName("NuPlayerDecoder");
76        mCodecLooper->start(false, false, ANDROID_PRIORITY_AUDIO);
77    }
78
79    (needDedicatedLooper ? mCodecLooper : looper())->registerHandler(mCodec);
80
81    mCodec->setNotificationMessage(notifyMsg);
82    mCodec->initiateSetup(format);
83}
84
85void NuPlayer::Decoder::onMessageReceived(const sp<AMessage> &msg) {
86    switch (msg->what()) {
87        case kWhatCodecNotify:
88        {
89            int32_t what;
90            CHECK(msg->findInt32("what", &what));
91
92            if (what == ACodec::kWhatFillThisBuffer) {
93                onFillThisBuffer(msg);
94            } else {
95                sp<AMessage> notify = mNotify->dup();
96                notify->setMessage("codec-request", msg);
97                notify->post();
98            }
99            break;
100        }
101
102        default:
103            TRESPASS();
104            break;
105    }
106}
107
108void NuPlayer::Decoder::onFillThisBuffer(const sp<AMessage> &msg) {
109    sp<AMessage> reply;
110    CHECK(msg->findMessage("reply", &reply));
111
112#if 0
113    sp<ABuffer> outBuffer;
114    CHECK(msg->findBuffer("buffer", &outBuffer));
115#else
116    sp<ABuffer> outBuffer;
117#endif
118
119    if (mCSDIndex < mCSD.size()) {
120        outBuffer = mCSD.editItemAt(mCSDIndex++);
121        outBuffer->meta()->setInt64("timeUs", 0);
122
123        reply->setBuffer("buffer", outBuffer);
124        reply->post();
125        return;
126    }
127
128    sp<AMessage> notify = mNotify->dup();
129    notify->setMessage("codec-request", msg);
130    notify->post();
131}
132
133void NuPlayer::Decoder::signalFlush() {
134    if (mCodec != NULL) {
135        mCodec->signalFlush();
136    }
137}
138
139void NuPlayer::Decoder::signalResume() {
140    if (mCodec != NULL) {
141        mCodec->signalResume();
142    }
143}
144
145void NuPlayer::Decoder::initiateShutdown() {
146    if (mCodec != NULL) {
147        mCodec->initiateShutdown();
148    }
149}
150
151bool NuPlayer::Decoder::supportsSeamlessAudioFormatChange(const sp<AMessage> &targetFormat) const {
152    if (targetFormat == NULL) {
153        return true;
154    }
155
156    AString mime;
157    if (!targetFormat->findString("mime", &mime)) {
158        return false;
159    }
160
161    if (!strcasecmp(mime.c_str(), MEDIA_MIMETYPE_AUDIO_AAC)) {
162        // field-by-field comparison
163        const char * keys[] = { "channel-count", "sample-rate", "is-adts" };
164        for (unsigned int i = 0; i < sizeof(keys) / sizeof(keys[0]); i++) {
165            int32_t oldVal, newVal;
166            if (!mFormat->findInt32(keys[i], &oldVal) || !targetFormat->findInt32(keys[i], &newVal)
167                    || oldVal != newVal) {
168                return false;
169            }
170        }
171
172        sp<ABuffer> oldBuf, newBuf;
173        if (mFormat->findBuffer("csd-0", &oldBuf) && targetFormat->findBuffer("csd-0", &newBuf)) {
174            if (oldBuf->size() != newBuf->size()) {
175                return false;
176            }
177            return !memcmp(oldBuf->data(), newBuf->data(), oldBuf->size());
178        }
179    }
180    return false;
181}
182
183bool NuPlayer::Decoder::supportsSeamlessFormatChange(const sp<AMessage> &targetFormat) const {
184    if (mFormat == NULL) {
185        return false;
186    }
187
188    if (targetFormat == NULL) {
189        return true;
190    }
191
192    AString oldMime, newMime;
193    if (!mFormat->findString("mime", &oldMime)
194            || !targetFormat->findString("mime", &newMime)
195            || !(oldMime == newMime)) {
196        return false;
197    }
198
199    bool audio = !strncasecmp(oldMime.c_str(), "audio/", strlen("audio/"));
200    bool seamless;
201    if (audio) {
202        seamless = supportsSeamlessAudioFormatChange(targetFormat);
203    } else {
204        seamless = mCodec != NULL && mCodec->isConfiguredForAdaptivePlayback();
205    }
206
207    ALOGV("%s seamless support for %s", seamless ? "yes" : "no", oldMime.c_str());
208    return seamless;
209}
210
211}  // namespace android
212
213