StreamingSource.cpp revision 42e549e4ab54802d788c43e3a04a85b7a1a95e97 
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      mEOS(false) {
38}
39
40NuPlayer::StreamingSource::~StreamingSource() {
41}
42
43void NuPlayer::StreamingSource::start() {
44    mStreamListener = new NuPlayerStreamListener(mSource, 0);
45    mTSParser = new ATSParser;
46
47    mStreamListener->start();
48}
49
50bool NuPlayer::StreamingSource::feedMoreTSData() {
51    if (mEOS) {
52        return false;
53    }
54
55    for (int32_t i = 0; i < 10; ++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            mEOS = true;
64            break;
65        } else if (n == INFO_DISCONTINUITY) {
66            ATSParser::DiscontinuityType type = ATSParser::DISCONTINUITY_SEEK;
67
68            int32_t formatChange;
69            if (extra != NULL
70                    && extra->findInt32(
71                        IStreamListener::kKeyFormatChange, &formatChange)
72                    && formatChange != 0) {
73                type = ATSParser::DISCONTINUITY_FORMATCHANGE;
74            }
75
76            mTSParser->signalDiscontinuity(type, extra);
77        } else if (n < 0) {
78            CHECK_EQ(n, -EWOULDBLOCK);
79            break;
80        } else {
81            if (buffer[0] == 0x00) {
82                // XXX legacy
83                mTSParser->signalDiscontinuity(
84                        buffer[1] == 0x00
85                            ? ATSParser::DISCONTINUITY_SEEK
86                            : ATSParser::DISCONTINUITY_FORMATCHANGE,
87                        extra);
88            } else {
89                mTSParser->feedTSPacket(buffer, sizeof(buffer));
90            }
91        }
92    }
93
94    return true;
95}
96
97sp<MetaData> NuPlayer::StreamingSource::getFormat(bool audio) {
98    ATSParser::SourceType type =
99        audio ? ATSParser::AUDIO : ATSParser::VIDEO;
100
101    sp<AnotherPacketSource> source =
102        static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
103
104    if (source == NULL) {
105        return NULL;
106    }
107
108    return source->getFormat();
109}
110
111status_t NuPlayer::StreamingSource::dequeueAccessUnit(
112        bool audio, sp<ABuffer> *accessUnit) {
113    ATSParser::SourceType type =
114        audio ? ATSParser::AUDIO : ATSParser::VIDEO;
115
116    sp<AnotherPacketSource> source =
117        static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
118
119    if (source == NULL) {
120        return -EWOULDBLOCK;
121    }
122
123    status_t finalResult;
124    if (!source->hasBufferAvailable(&finalResult)) {
125        return finalResult == OK ? -EWOULDBLOCK : finalResult;
126    }
127
128    return source->dequeueAccessUnit(accessUnit);
129}
130
131}  // namespace android
132
133