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