GenericSource.cpp revision 632740c58119a132ce19f6d498e39c5c3773971a 
1/*
2 * Copyright (C) 2012 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#include "GenericSource.h"
18
19#include "AnotherPacketSource.h"
20
21#include <media/stagefright/foundation/ABuffer.h>
22#include <media/stagefright/foundation/ADebug.h>
23#include <media/stagefright/foundation/AMessage.h>
24#include <media/stagefright/DataSource.h>
25#include <media/stagefright/FileSource.h>
26#include <media/stagefright/MediaBuffer.h>
27#include <media/stagefright/MediaDefs.h>
28#include <media/stagefright/MediaExtractor.h>
29#include <media/stagefright/MediaSource.h>
30#include <media/stagefright/MetaData.h>
31
32namespace android {
33
34NuPlayer::GenericSource::GenericSource(
35        const sp<AMessage> &notify,
36        const sp<IMediaHTTPService> &httpService,
37        const char *url,
38        const KeyedVector<String8, String8> *headers)
39    : Source(notify),
40      mDurationUs(0ll),
41      mAudioIsVorbis(false) {
42    DataSource::RegisterDefaultSniffers();
43
44    sp<DataSource> dataSource =
45        DataSource::CreateFromURI(httpService, url, headers);
46    CHECK(dataSource != NULL);
47
48    initFromDataSource(dataSource);
49}
50
51NuPlayer::GenericSource::GenericSource(
52        const sp<AMessage> &notify,
53        int fd, int64_t offset, int64_t length)
54    : Source(notify),
55      mDurationUs(0ll),
56      mAudioIsVorbis(false) {
57    DataSource::RegisterDefaultSniffers();
58
59    sp<DataSource> dataSource = new FileSource(dup(fd), offset, length);
60
61    initFromDataSource(dataSource);
62}
63
64void NuPlayer::GenericSource::initFromDataSource(
65        const sp<DataSource> &dataSource) {
66    sp<MediaExtractor> extractor = MediaExtractor::Create(dataSource);
67
68    CHECK(extractor != NULL);
69
70    sp<MetaData> fileMeta = extractor->getMetaData();
71    if (fileMeta != NULL) {
72        int64_t duration;
73        if (fileMeta->findInt64(kKeyDuration, &duration)) {
74            mDurationUs = duration;
75        }
76    }
77
78    for (size_t i = 0; i < extractor->countTracks(); ++i) {
79        sp<MetaData> meta = extractor->getTrackMetaData(i);
80
81        const char *mime;
82        CHECK(meta->findCString(kKeyMIMEType, &mime));
83
84        sp<MediaSource> track;
85
86        if (!strncasecmp(mime, "audio/", 6)) {
87            if (mAudioTrack.mSource == NULL) {
88                mAudioTrack.mSource = track = extractor->getTrack(i);
89
90                if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
91                    mAudioIsVorbis = true;
92                } else {
93                    mAudioIsVorbis = false;
94                }
95            }
96        } else if (!strncasecmp(mime, "video/", 6)) {
97            if (mVideoTrack.mSource == NULL) {
98                mVideoTrack.mSource = track = extractor->getTrack(i);
99            }
100        }
101
102        if (track != NULL) {
103            int64_t durationUs;
104            if (meta->findInt64(kKeyDuration, &durationUs)) {
105                if (durationUs > mDurationUs) {
106                    mDurationUs = durationUs;
107                }
108            }
109        }
110    }
111}
112
113NuPlayer::GenericSource::~GenericSource() {
114}
115
116void NuPlayer::GenericSource::prepareAsync() {
117    if (mVideoTrack.mSource != NULL) {
118        sp<MetaData> meta = mVideoTrack.mSource->getFormat();
119
120        int32_t width, height;
121        CHECK(meta->findInt32(kKeyWidth, &width));
122        CHECK(meta->findInt32(kKeyHeight, &height));
123
124        notifyVideoSizeChanged(width, height);
125    }
126
127    notifyFlagsChanged(
128            FLAG_CAN_PAUSE
129            | FLAG_CAN_SEEK_BACKWARD
130            | FLAG_CAN_SEEK_FORWARD
131            | FLAG_CAN_SEEK);
132
133    notifyPrepared();
134}
135
136void NuPlayer::GenericSource::start() {
137    ALOGI("start");
138
139    if (mAudioTrack.mSource != NULL) {
140        CHECK_EQ(mAudioTrack.mSource->start(), (status_t)OK);
141
142        mAudioTrack.mPackets =
143            new AnotherPacketSource(mAudioTrack.mSource->getFormat());
144
145        readBuffer(true /* audio */);
146    }
147
148    if (mVideoTrack.mSource != NULL) {
149        CHECK_EQ(mVideoTrack.mSource->start(), (status_t)OK);
150
151        mVideoTrack.mPackets =
152            new AnotherPacketSource(mVideoTrack.mSource->getFormat());
153
154        readBuffer(false /* audio */);
155    }
156}
157
158status_t NuPlayer::GenericSource::feedMoreTSData() {
159    return OK;
160}
161
162sp<MetaData> NuPlayer::GenericSource::getFormatMeta(bool audio) {
163    sp<MediaSource> source = audio ? mAudioTrack.mSource : mVideoTrack.mSource;
164
165    if (source == NULL) {
166        return NULL;
167    }
168
169    return source->getFormat();
170}
171
172status_t NuPlayer::GenericSource::dequeueAccessUnit(
173        bool audio, sp<ABuffer> *accessUnit) {
174    Track *track = audio ? &mAudioTrack : &mVideoTrack;
175
176    if (track->mSource == NULL) {
177        return -EWOULDBLOCK;
178    }
179
180    status_t finalResult;
181    if (!track->mPackets->hasBufferAvailable(&finalResult)) {
182        return finalResult == OK ? -EWOULDBLOCK : finalResult;
183    }
184
185    status_t result = track->mPackets->dequeueAccessUnit(accessUnit);
186
187    readBuffer(audio, -1ll);
188
189    return result;
190}
191
192status_t NuPlayer::GenericSource::getDuration(int64_t *durationUs) {
193    *durationUs = mDurationUs;
194    return OK;
195}
196
197status_t NuPlayer::GenericSource::seekTo(int64_t seekTimeUs) {
198    if (mVideoTrack.mSource != NULL) {
199        int64_t actualTimeUs;
200        readBuffer(false /* audio */, seekTimeUs, &actualTimeUs);
201
202        seekTimeUs = actualTimeUs;
203    }
204
205    if (mAudioTrack.mSource != NULL) {
206        readBuffer(true /* audio */, seekTimeUs);
207    }
208
209    return OK;
210}
211
212void NuPlayer::GenericSource::readBuffer(
213        bool audio, int64_t seekTimeUs, int64_t *actualTimeUs) {
214    Track *track = audio ? &mAudioTrack : &mVideoTrack;
215    CHECK(track->mSource != NULL);
216
217    if (actualTimeUs) {
218        *actualTimeUs = seekTimeUs;
219    }
220
221    MediaSource::ReadOptions options;
222
223    bool seeking = false;
224
225    if (seekTimeUs >= 0) {
226        options.setSeekTo(seekTimeUs);
227        seeking = true;
228    }
229
230    for (;;) {
231        MediaBuffer *mbuf;
232        status_t err = track->mSource->read(&mbuf, &options);
233
234        options.clearSeekTo();
235
236        if (err == OK) {
237            size_t outLength = mbuf->range_length();
238
239            if (audio && mAudioIsVorbis) {
240                outLength += sizeof(int32_t);
241            }
242
243            sp<ABuffer> buffer = new ABuffer(outLength);
244
245            memcpy(buffer->data(),
246                   (const uint8_t *)mbuf->data() + mbuf->range_offset(),
247                   mbuf->range_length());
248
249            if (audio && mAudioIsVorbis) {
250                int32_t numPageSamples;
251                if (!mbuf->meta_data()->findInt32(
252                            kKeyValidSamples, &numPageSamples)) {
253                    numPageSamples = -1;
254                }
255
256                memcpy(buffer->data() + mbuf->range_length(),
257                       &numPageSamples,
258                       sizeof(numPageSamples));
259            }
260
261            int64_t timeUs;
262            CHECK(mbuf->meta_data()->findInt64(kKeyTime, &timeUs));
263
264            buffer->meta()->setInt64("timeUs", timeUs);
265
266            if (actualTimeUs) {
267                *actualTimeUs = timeUs;
268            }
269
270            mbuf->release();
271            mbuf = NULL;
272
273            if (seeking) {
274                track->mPackets->queueDiscontinuity(
275                        ATSParser::DISCONTINUITY_SEEK,
276                        NULL,
277                        true /* discard */);
278            }
279
280            track->mPackets->queueAccessUnit(buffer);
281            break;
282        } else if (err == INFO_FORMAT_CHANGED) {
283#if 0
284            track->mPackets->queueDiscontinuity(
285                    ATSParser::DISCONTINUITY_FORMATCHANGE,
286                    NULL,
287                    false /* discard */);
288#endif
289        } else {
290            track->mPackets->signalEOS(err);
291            break;
292        }
293    }
294}
295
296}  // namespace android
297