muxer.cpp revision a0cf6c4d7d13c73feef5b88760b52b18289b0db2 
1/*
2 * Copyright (C) 2013 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 "muxer"
19#include <inttypes.h>
20#include <sys/types.h>
21#include <sys/stat.h>
22#include <fcntl.h>
23#include <utils/Log.h>
24
25#include <binder/ProcessState.h>
26#include <media/IMediaHTTPService.h>
27#include <media/stagefright/foundation/ABuffer.h>
28#include <media/stagefright/foundation/ADebug.h>
29#include <media/stagefright/foundation/ALooper.h>
30#include <media/stagefright/foundation/AMessage.h>
31#include <media/stagefright/foundation/AString.h>
32#include <media/stagefright/DataSource.h>
33#include <media/stagefright/MediaCodec.h>
34#include <media/stagefright/MediaDefs.h>
35#include <media/stagefright/MediaMuxer.h>
36#include <media/stagefright/MetaData.h>
37#include <media/stagefright/NuMediaExtractor.h>
38
39static void usage(const char *me) {
40    fprintf(stderr, "usage: %s [-a] [-v] [-s <trim start time>]"
41                    " [-e <trim end time>] [-o <output file>]"
42                    " <input video file>\n", me);
43    fprintf(stderr, "       -h help\n");
44    fprintf(stderr, "       -a use audio\n");
45    fprintf(stderr, "       -v use video\n");
46    fprintf(stderr, "       -s Time in milli-seconds when the trim should start\n");
47    fprintf(stderr, "       -e Time in milli-seconds when the trim should end\n");
48    fprintf(stderr, "       -o output file name. Default is /sdcard/muxeroutput.mp4\n");
49
50    exit(1);
51}
52
53using namespace android;
54
55static int muxing(
56        const char *path,
57        bool useAudio,
58        bool useVideo,
59        const char *outputFileName,
60        bool enableTrim,
61        int trimStartTimeMs,
62        int trimEndTimeMs,
63        int rotationDegrees) {
64    sp<NuMediaExtractor> extractor = new NuMediaExtractor;
65    if (extractor->setDataSource(NULL /* httpService */, path) != OK) {
66        fprintf(stderr, "unable to instantiate extractor. %s\n", path);
67        return 1;
68    }
69
70    if (outputFileName == NULL) {
71        outputFileName = "/sdcard/muxeroutput.mp4";
72    }
73
74    ALOGV("input file %s, output file %s", path, outputFileName);
75    ALOGV("useAudio %d, useVideo %d", useAudio, useVideo);
76
77    int fd = open(outputFileName, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR);
78
79    if (fd < 0) {
80        ALOGE("couldn't open file");
81        return fd;
82    }
83    sp<MediaMuxer> muxer = new MediaMuxer(fd,
84                                          MediaMuxer::OUTPUT_FORMAT_MPEG_4);
85    close(fd);
86
87    size_t trackCount = extractor->countTracks();
88    // Map the extractor's track index to the muxer's track index.
89    KeyedVector<size_t, ssize_t> trackIndexMap;
90    size_t bufferSize = 1 * 1024 * 1024;  // default buffer size is 1MB.
91
92    bool haveAudio = false;
93    bool haveVideo = false;
94
95    int64_t trimStartTimeUs = trimStartTimeMs * 1000;
96    int64_t trimEndTimeUs = trimEndTimeMs * 1000;
97    bool trimStarted = false;
98    int64_t trimOffsetTimeUs = 0;
99
100    for (size_t i = 0; i < trackCount; ++i) {
101        sp<AMessage> format;
102        status_t err = extractor->getTrackFormat(i, &format);
103        CHECK_EQ(err, (status_t)OK);
104        ALOGV("extractor getTrackFormat: %s", format->debugString().c_str());
105
106        AString mime;
107        CHECK(format->findString("mime", &mime));
108
109        bool isAudio = !strncasecmp(mime.c_str(), "audio/", 6);
110        bool isVideo = !strncasecmp(mime.c_str(), "video/", 6);
111
112        if (useAudio && !haveAudio && isAudio) {
113            haveAudio = true;
114        } else if (useVideo && !haveVideo && isVideo) {
115            haveVideo = true;
116        } else {
117            continue;
118        }
119
120        if (isVideo) {
121            int width , height;
122            CHECK(format->findInt32("width", &width));
123            CHECK(format->findInt32("height", &height));
124            bufferSize = width * height * 4;  // Assuming it is maximally 4BPP
125        }
126
127        int64_t duration;
128        CHECK(format->findInt64("durationUs", &duration));
129
130        // Since we got the duration now, correct the start time.
131        if (enableTrim) {
132            if (trimStartTimeUs > duration) {
133                fprintf(stderr, "Warning: trimStartTimeUs > duration,"
134                                " reset to 0\n");
135                trimStartTimeUs = 0;
136            }
137        }
138
139        ALOGV("selecting track %zu", i);
140
141        err = extractor->selectTrack(i);
142        CHECK_EQ(err, (status_t)OK);
143
144        ssize_t newTrackIndex = muxer->addTrack(format);
145        if (newTrackIndex < 0) {
146            fprintf(stderr, "%s track (%d) unsupported by muxer\n",
147                    isAudio ? "audio" : "video",
148                    i);
149        } else {
150            trackIndexMap.add(i, newTrackIndex);
151        }
152    }
153
154    int64_t muxerStartTimeUs = ALooper::GetNowUs();
155
156    bool sawInputEOS = false;
157
158    size_t trackIndex = -1;
159    sp<ABuffer> newBuffer = new ABuffer(bufferSize);
160
161    muxer->setOrientationHint(rotationDegrees);
162    muxer->start();
163
164    while (!sawInputEOS) {
165        status_t err = extractor->getSampleTrackIndex(&trackIndex);
166        if (err != OK) {
167            ALOGV("saw input eos, err %d", err);
168            sawInputEOS = true;
169            break;
170        } else if (trackIndexMap.indexOfKey(trackIndex) < 0) {
171            // ALOGV("skipping input from unsupported track %zu", trackIndex);
172            extractor->advance();
173            continue;
174        } else {
175            // ALOGV("reading sample from track index %zu\n", trackIndex);
176            err = extractor->readSampleData(newBuffer);
177            CHECK_EQ(err, (status_t)OK);
178
179            int64_t timeUs;
180            err = extractor->getSampleTime(&timeUs);
181            CHECK_EQ(err, (status_t)OK);
182
183            sp<MetaData> meta;
184            err = extractor->getSampleMeta(&meta);
185            CHECK_EQ(err, (status_t)OK);
186
187            uint32_t sampleFlags = 0;
188            int32_t val;
189            if (meta->findInt32(kKeyIsSyncFrame, &val) && val != 0) {
190                // We only support BUFFER_FLAG_SYNCFRAME in the flag for now.
191                sampleFlags |= MediaCodec::BUFFER_FLAG_SYNCFRAME;
192
193                // We turn on trimming at the sync frame.
194                if (enableTrim && timeUs > trimStartTimeUs &&
195                    timeUs <= trimEndTimeUs) {
196                    if (trimStarted == false) {
197                        trimOffsetTimeUs = timeUs;
198                    }
199                    trimStarted = true;
200                }
201            }
202            // Trim can end at any non-sync frame.
203            if (enableTrim && timeUs > trimEndTimeUs) {
204                trimStarted = false;
205            }
206
207            if (!enableTrim || (enableTrim && trimStarted)) {
208                err = muxer->writeSampleData(newBuffer,
209                                             trackIndexMap.valueFor(trackIndex),
210                                             timeUs - trimOffsetTimeUs, sampleFlags);
211            }
212
213            extractor->advance();
214        }
215    }
216
217    muxer->stop();
218    newBuffer.clear();
219    trackIndexMap.clear();
220
221    int64_t elapsedTimeUs = ALooper::GetNowUs() - muxerStartTimeUs;
222    fprintf(stderr, "SUCCESS: muxer generate the video in %" PRId64 " ms\n",
223            elapsedTimeUs / 1000);
224
225    return 0;
226}
227
228int main(int argc, char **argv) {
229    const char *me = argv[0];
230
231    bool useAudio = false;
232    bool useVideo = false;
233    char *outputFileName = NULL;
234    int trimStartTimeMs = -1;
235    int trimEndTimeMs = -1;
236    int rotationDegrees = 0;
237    // When trimStartTimeMs and trimEndTimeMs seems valid, we turn this switch
238    // to true.
239    bool enableTrim = false;
240
241    int res;
242    while ((res = getopt(argc, argv, "h?avo:s:e:r:")) >= 0) {
243        switch (res) {
244            case 'a':
245            {
246                useAudio = true;
247                break;
248            }
249
250            case 'v':
251            {
252                useVideo = true;
253                break;
254            }
255
256            case 'o':
257            {
258                outputFileName = optarg;
259                break;
260            }
261
262            case 's':
263            {
264                trimStartTimeMs = atoi(optarg);
265                break;
266            }
267
268            case 'e':
269            {
270                trimEndTimeMs = atoi(optarg);
271                break;
272            }
273
274            case 'r':
275            {
276                rotationDegrees = atoi(optarg);
277                break;
278            }
279
280            case '?':
281            case 'h':
282            default:
283            {
284                usage(me);
285            }
286        }
287    }
288
289    argc -= optind;
290    argv += optind;
291
292    if (argc != 1) {
293        usage(me);
294    }
295
296    if (trimStartTimeMs < 0 || trimEndTimeMs < 0) {
297        // If no input on either 's' or 'e', or they are obviously wrong input,
298        // then turn off trimming.
299        ALOGV("Trimming is disabled, copying the whole length video.");
300        enableTrim = false;
301    } else if (trimStartTimeMs > trimEndTimeMs) {
302        fprintf(stderr, "ERROR: start time is bigger\n");
303        return 1;
304    } else {
305        enableTrim = true;
306    }
307
308    if (!useAudio && !useVideo) {
309        fprintf(stderr, "ERROR: Missing both -a and -v, no track to mux then.\n");
310        return 1;
311    }
312    ProcessState::self()->startThreadPool();
313
314    // Make sure setDataSource() works.
315    DataSource::RegisterDefaultSniffers();
316
317    sp<ALooper> looper = new ALooper;
318    looper->start();
319
320    int result = muxing(argv[0], useAudio, useVideo, outputFileName,
321                        enableTrim, trimStartTimeMs, trimEndTimeMs, rotationDegrees);
322
323    looper->stop();
324
325    return result;
326}
327