StreamingSource.cpp revision bfcc8d8ab7c56bc013bd221a29e1ecf3a6390813 
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    mTSParser = new ATSParser(ATSParser::TS_TIMESTAMPS_ARE_ABSOLUTE);
46
47    mStreamListener->start();
48}
49
50status_t NuPlayer::StreamingSource::feedMoreTSData() {
51    if (mFinalResult != OK) {
52        return mFinalResult;
53    }
54
55    for (int32_t i = 0; i < 50; ++i) {
56        char buffer[188];
57        sp<AMessage> extra;
58        ssize_t n = mStreamListener->read(buffer, sizeof(buffer), &extra);
59
60        if (n == 0) {
61            LOGI("input data EOS reached.");
62            mTSParser->signalEOS(ERROR_END_OF_STREAM);
63            mFinalResult = ERROR_END_OF_STREAM;
64            break;
65        } else if (n == INFO_DISCONTINUITY) {
66            int32_t type = ATSParser::DISCONTINUITY_SEEK;
67
68            int32_t mask;
69            if (extra != NULL
70                    && extra->findInt32(
71                        IStreamListener::kKeyDiscontinuityMask, &mask)) {
72                if (mask == 0) {
73                    LOGE("Client specified an illegal discontinuity type.");
74                    return ERROR_UNSUPPORTED;
75                }
76
77                type = mask;
78            }
79
80            mTSParser->signalDiscontinuity(
81                    (ATSParser::DiscontinuityType)type, extra);
82        } else if (n < 0) {
83            CHECK_EQ(n, -EWOULDBLOCK);
84            break;
85        } else {
86            if (buffer[0] == 0x00) {
87                // XXX legacy
88                mTSParser->signalDiscontinuity(
89                        buffer[1] == 0x00
90                            ? ATSParser::DISCONTINUITY_SEEK
91                            : ATSParser::DISCONTINUITY_FORMATCHANGE,
92                        extra);
93            } else {
94                status_t err = mTSParser->feedTSPacket(buffer, sizeof(buffer));
95
96                if (err != OK) {
97                    LOGE("TS Parser returned error %d", err);
98
99                    mTSParser->signalEOS(err);
100                    mFinalResult = err;
101                    break;
102                }
103            }
104        }
105    }
106
107    return OK;
108}
109
110sp<MetaData> NuPlayer::StreamingSource::getFormat(bool audio) {
111    ATSParser::SourceType type =
112        audio ? ATSParser::AUDIO : ATSParser::VIDEO;
113
114    sp<AnotherPacketSource> source =
115        static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
116
117    if (source == NULL) {
118        return NULL;
119    }
120
121    return source->getFormat();
122}
123
124status_t NuPlayer::StreamingSource::dequeueAccessUnit(
125        bool audio, sp<ABuffer> *accessUnit) {
126    ATSParser::SourceType type =
127        audio ? ATSParser::AUDIO : ATSParser::VIDEO;
128
129    sp<AnotherPacketSource> source =
130        static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
131
132    if (source == NULL) {
133        return -EWOULDBLOCK;
134    }
135
136    status_t finalResult;
137    if (!source->hasBufferAvailable(&finalResult)) {
138        return finalResult == OK ? -EWOULDBLOCK : finalResult;
139    }
140
141    return source->dequeueAccessUnit(accessUnit);
142}
143
144}  // namespace android
145
146