StreamingSource.cpp revision 078cfcf7cce9185ec7559910d08b0bc02bfc88a3 
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(ATSParser::TS_TIMESTAMPS_ARE_ABSOLUTE);
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 < 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            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                status_t err = mTSParser->feedTSPacket(buffer, sizeof(buffer));
90
91                if (err != OK) {
92                    LOGE("TS Parser returned error %d", err);
93
94                    mTSParser->signalEOS(err);
95                    mEOS = true;
96                    break;
97                }
98            }
99        }
100    }
101
102    return true;
103}
104
105sp<MetaData> NuPlayer::StreamingSource::getFormat(bool audio) {
106    ATSParser::SourceType type =
107        audio ? ATSParser::AUDIO : ATSParser::VIDEO;
108
109    sp<AnotherPacketSource> source =
110        static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
111
112    if (source == NULL) {
113        return NULL;
114    }
115
116    return source->getFormat();
117}
118
119status_t NuPlayer::StreamingSource::dequeueAccessUnit(
120        bool audio, sp<ABuffer> *accessUnit) {
121    ATSParser::SourceType type =
122        audio ? ATSParser::AUDIO : ATSParser::VIDEO;
123
124    sp<AnotherPacketSource> source =
125        static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get());
126
127    if (source == NULL) {
128        return -EWOULDBLOCK;
129    }
130
131    status_t finalResult;
132    if (!source->hasBufferAvailable(&finalResult)) {
133        return finalResult == OK ? -EWOULDBLOCK : finalResult;
134    }
135
136    return source->dequeueAccessUnit(accessUnit);
137}
138
139}  // namespace android
140
141