StreamingSource.cpp revision ced1c2f8f6c422063092f5cc5c675ccdebb2dc10 
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 "StreamingSource"
19#include <utils/Log.h>
20
21#include "StreamingSource.h"
22
23#include "ATSParser.h"
24#include "AnotherPacketSource.h"
25#include "NuPlayerStreamListener.h"
26
27#include <media/stagefright/foundation/ABuffer.h>
28#include <media/stagefright/foundation/ADebug.h>
29#include <media/stagefright/foundation/AMessage.h>
30#include <media/stagefright/MediaSource.h>
31#include <media/stagefright/MetaData.h>
32
33namespace android {
34
35NuPlayer::StreamingSource::StreamingSource(
36        const sp<AMessage> &notify,
37        const sp<IStreamSource> &source)
38    : Source(notify),
39      mSource(source),
40      mFinalResult(OK) {
41}
42
43NuPlayer::StreamingSource::~StreamingSource() {
44}
45
46void NuPlayer::StreamingSource::prepareAsync() {
47    notifyVideoSizeChanged();
48    notifyFlagsChanged(0);
49    notifyPrepared();
50}
51
52void NuPlayer::StreamingSource::start() {
53    mStreamListener = new NuPlayerStreamListener(mSource, 0);
54
55    uint32_t sourceFlags = mSource->flags();
56
57    uint32_t parserFlags = ATSParser::TS_TIMESTAMPS_ARE_ABSOLUTE;
58    if (sourceFlags & IStreamSource::kFlagAlignedVideoData) {
59        parserFlags |= ATSParser::ALIGNED_VIDEO_DATA;
60    }
61
62    mTSParser = new ATSParser(parserFlags);
63
64    mStreamListener->start();
65}
66
67status_t NuPlayer::StreamingSource::feedMoreTSData() {
68    if (mFinalResult != OK) {
69        return mFinalResult;
70    }
71
72    for (int32_t i = 0; i < 50; ++i) {
73        char buffer[188];
74        sp<AMessage> extra;
75        ssize_t n = mStreamListener->read(buffer, sizeof(buffer), &extra);
76
77        if (n == 0) {
78            ALOGI("input data EOS reached.");
79            mTSParser->signalEOS(ERROR_END_OF_STREAM);
80            mFinalResult = ERROR_END_OF_STREAM;
81            break;
82        } else if (n == INFO_DISCONTINUITY) {
83            int32_t type = ATSParser::DISCONTINUITY_SEEK;
84
85            int32_t mask;
86            if (extra != NULL
87                    && extra->findInt32(
88                        IStreamListener::kKeyDiscontinuityMask, &mask)) {
89                if (mask == 0) {
90                    ALOGE("Client specified an illegal discontinuity type.");
91                    return ERROR_UNSUPPORTED;
92                }
93
94                type = mask;
95            }
96
97            mTSParser->signalDiscontinuity(
98                    (ATSParser::DiscontinuityType)type, extra);
99        } else if (n < 0) {
100            CHECK_EQ(n, -EWOULDBLOCK);
101            break;
102        } else {
103            if (buffer[0] == 0x00) {
104                // XXX legacy
105
106                if (extra == NULL) {
107                    extra = new AMessage;
108                }
109
110                uint8_t type = buffer[1];
111
112                if (type & 2) {
113                    int64_t mediaTimeUs;
114                    memcpy(&mediaTimeUs, &buffer[2], sizeof(mediaTimeUs));
115
116                    extra->setInt64(IStreamListener::kKeyMediaTimeUs, mediaTimeUs);
117                }
118
119                mTSParser->signalDiscontinuity(
120                        ((type & 1) == 0)
121                            ? ATSParser::DISCONTINUITY_SEEK
122                            : ATSParser::DISCONTINUITY_FORMATCHANGE,
123                        extra);
124            } else {
125                status_t err = mTSParser->feedTSPacket(buffer, sizeof(buffer));
126
127                if (err != OK) {
128                    ALOGE("TS Parser returned error %d", err);
129
130                    mTSParser->signalEOS(err);
131                    mFinalResult = err;
132                    break;
133                }
134            }
135        }
136    }
137
138    return OK;
139}
140
141sp<MetaData> NuPlayer::StreamingSource::getFormatMeta(bool audio) {
142    ATSParser::SourceType type =
143        audio ? ATSParser::AUDIO : ATSParser::VIDEO;
144
145    sp<AnotherPacketSource> source =
146        static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
147
148    if (source == NULL) {
149        return NULL;
150    }
151
152    return source->getFormat();
153}
154
155status_t NuPlayer::StreamingSource::dequeueAccessUnit(
156        bool audio, sp<ABuffer> *accessUnit) {
157    ATSParser::SourceType type =
158        audio ? ATSParser::AUDIO : ATSParser::VIDEO;
159
160    sp<AnotherPacketSource> source =
161        static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
162
163    if (source == NULL) {
164        return -EWOULDBLOCK;
165    }
166
167    status_t finalResult;
168    if (!source->hasBufferAvailable(&finalResult)) {
169        return finalResult == OK ? -EWOULDBLOCK : finalResult;
170    }
171
172    status_t err = source->dequeueAccessUnit(accessUnit);
173
174#if !defined(LOG_NDEBUG) || LOG_NDEBUG == 0
175    if (err == OK) {
176        int64_t timeUs;
177        CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs));
178        ALOGV("dequeueAccessUnit timeUs=%lld us", timeUs);
179    }
180#endif
181
182    return err;
183}
184
185bool NuPlayer::StreamingSource::isRealTime() const {
186    return mSource->flags() & IStreamSource::kFlagIsRealTimeData;
187}
188
189}  // namespace android
190
191