| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <media/stagefright/foundation/ADebug.h> |
| #include <media/stagefright/AMRWriter.h> |
| #include <media/stagefright/MediaBuffer.h> |
| #include <media/stagefright/MediaDefs.h> |
| #include <media/stagefright/MediaErrors.h> |
| #include <media/stagefright/MediaSource.h> |
| #include <media/stagefright/MetaData.h> |
| #include <media/mediarecorder.h> |
| #include <sys/prctl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| |
| namespace android { |
| |
| AMRWriter::AMRWriter(const char *filename) |
| : mFd(-1), |
| mInitCheck(NO_INIT), |
| mStarted(false), |
| mPaused(false), |
| mResumed(false) { |
| |
| mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR); |
| if (mFd >= 0) { |
| mInitCheck = OK; |
| } |
| } |
| |
| AMRWriter::AMRWriter(int fd) |
| : mFd(dup(fd)), |
| mInitCheck(mFd < 0? NO_INIT: OK), |
| mStarted(false), |
| mPaused(false), |
| mResumed(false) { |
| } |
| |
| AMRWriter::~AMRWriter() { |
| if (mStarted) { |
| reset(); |
| } |
| |
| if (mFd != -1) { |
| close(mFd); |
| mFd = -1; |
| } |
| } |
| |
| status_t AMRWriter::initCheck() const { |
| return mInitCheck; |
| } |
| |
| status_t AMRWriter::addSource(const sp<MediaSource> &source) { |
| if (mInitCheck != OK) { |
| return mInitCheck; |
| } |
| |
| if (mSource != NULL) { |
| // AMR files only support a single track of audio. |
| return UNKNOWN_ERROR; |
| } |
| |
| sp<MetaData> meta = source->getFormat(); |
| |
| const char *mime; |
| CHECK(meta->findCString(kKeyMIMEType, &mime)); |
| |
| bool isWide = false; |
| if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_WB)) { |
| isWide = true; |
| } else if (strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AMR_NB)) { |
| return ERROR_UNSUPPORTED; |
| } |
| |
| int32_t channelCount; |
| int32_t sampleRate; |
| CHECK(meta->findInt32(kKeyChannelCount, &channelCount)); |
| CHECK_EQ(channelCount, 1); |
| CHECK(meta->findInt32(kKeySampleRate, &sampleRate)); |
| CHECK_EQ(sampleRate, (isWide ? 16000 : 8000)); |
| |
| mSource = source; |
| |
| const char *kHeader = isWide ? "#!AMR-WB\n" : "#!AMR\n"; |
| ssize_t n = strlen(kHeader); |
| if (write(mFd, kHeader, n) != n) { |
| return ERROR_IO; |
| } |
| |
| return OK; |
| } |
| |
| status_t AMRWriter::start(MetaData *params) { |
| if (mInitCheck != OK) { |
| return mInitCheck; |
| } |
| |
| if (mSource == NULL) { |
| return UNKNOWN_ERROR; |
| } |
| |
| if (mStarted && mPaused) { |
| mPaused = false; |
| mResumed = true; |
| return OK; |
| } else if (mStarted) { |
| // Already started, does nothing |
| return OK; |
| } |
| |
| status_t err = mSource->start(); |
| |
| if (err != OK) { |
| return err; |
| } |
| |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); |
| |
| mReachedEOS = false; |
| mDone = false; |
| |
| pthread_create(&mThread, &attr, ThreadWrapper, this); |
| pthread_attr_destroy(&attr); |
| |
| mStarted = true; |
| |
| return OK; |
| } |
| |
| status_t AMRWriter::pause() { |
| if (!mStarted) { |
| return OK; |
| } |
| mPaused = true; |
| return OK; |
| } |
| |
| status_t AMRWriter::reset() { |
| if (!mStarted) { |
| return OK; |
| } |
| |
| mDone = true; |
| |
| void *dummy; |
| pthread_join(mThread, &dummy); |
| |
| status_t err = (status_t) dummy; |
| { |
| status_t status = mSource->stop(); |
| if (err == OK && |
| (status != OK && status != ERROR_END_OF_STREAM)) { |
| err = status; |
| } |
| } |
| |
| mStarted = false; |
| return err; |
| } |
| |
| bool AMRWriter::exceedsFileSizeLimit() { |
| if (mMaxFileSizeLimitBytes == 0) { |
| return false; |
| } |
| return mEstimatedSizeBytes >= mMaxFileSizeLimitBytes; |
| } |
| |
| bool AMRWriter::exceedsFileDurationLimit() { |
| if (mMaxFileDurationLimitUs == 0) { |
| return false; |
| } |
| return mEstimatedDurationUs >= mMaxFileDurationLimitUs; |
| } |
| |
| // static |
| void *AMRWriter::ThreadWrapper(void *me) { |
| return (void *) static_cast<AMRWriter *>(me)->threadFunc(); |
| } |
| |
| status_t AMRWriter::threadFunc() { |
| mEstimatedDurationUs = 0; |
| mEstimatedSizeBytes = 0; |
| bool stoppedPrematurely = true; |
| int64_t previousPausedDurationUs = 0; |
| int64_t maxTimestampUs = 0; |
| status_t err = OK; |
| |
| prctl(PR_SET_NAME, (unsigned long)"AMRWriter", 0, 0, 0); |
| while (!mDone) { |
| MediaBuffer *buffer; |
| err = mSource->read(&buffer); |
| |
| if (err != OK) { |
| break; |
| } |
| |
| if (mPaused) { |
| buffer->release(); |
| buffer = NULL; |
| continue; |
| } |
| |
| mEstimatedSizeBytes += buffer->range_length(); |
| if (exceedsFileSizeLimit()) { |
| buffer->release(); |
| buffer = NULL; |
| notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); |
| break; |
| } |
| |
| int64_t timestampUs; |
| CHECK(buffer->meta_data()->findInt64(kKeyTime, ×tampUs)); |
| if (timestampUs > mEstimatedDurationUs) { |
| mEstimatedDurationUs = timestampUs; |
| } |
| if (mResumed) { |
| previousPausedDurationUs += (timestampUs - maxTimestampUs - 20000); |
| mResumed = false; |
| } |
| timestampUs -= previousPausedDurationUs; |
| ALOGV("time stamp: %lld, previous paused duration: %lld", |
| timestampUs, previousPausedDurationUs); |
| if (timestampUs > maxTimestampUs) { |
| maxTimestampUs = timestampUs; |
| } |
| |
| if (exceedsFileDurationLimit()) { |
| buffer->release(); |
| buffer = NULL; |
| notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); |
| break; |
| } |
| ssize_t n = write(mFd, |
| (const uint8_t *)buffer->data() + buffer->range_offset(), |
| buffer->range_length()); |
| |
| if (n < (ssize_t)buffer->range_length()) { |
| buffer->release(); |
| buffer = NULL; |
| err = ERROR_IO; |
| break; |
| } |
| |
| if (err != OK) { |
| break; |
| } |
| |
| if (stoppedPrematurely) { |
| stoppedPrematurely = false; |
| } |
| |
| buffer->release(); |
| buffer = NULL; |
| } |
| |
| if ((err == OK || err == ERROR_END_OF_STREAM) && stoppedPrematurely) { |
| err = ERROR_MALFORMED; |
| } |
| |
| close(mFd); |
| mFd = -1; |
| mReachedEOS = true; |
| if (err == ERROR_END_OF_STREAM) { |
| return OK; |
| } |
| return err; |
| } |
| |
| bool AMRWriter::reachedEOS() { |
| return mReachedEOS; |
| } |
| |
| } // namespace android |