AMRExtractor::AMRExtractor(const sp<DataSource> &source)
: mDataSource(source),
mInitCheck(NO_INIT),
mOffsetTableLength(0) {
String8 mimeType;
float confidence;
if (!SniffAMR(mDataSource, &mimeType, &confidence, NULL)) {
return;
}
mIsWide = (mimeType == MEDIA_MIMETYPE_AUDIO_AMR_WB);
mMeta = new MetaData;
mMeta->setCString(
kKeyMIMEType, mIsWide ? MEDIA_MIMETYPE_AUDIO_AMR_WB
: MEDIA_MIMETYPE_AUDIO_AMR_NB);
mMeta->setInt32(kKeyChannelCount, 1);
mMeta->setInt32(kKeySampleRate, mIsWide ? 16000 : 8000);
off64_t offset = mIsWide ? 9 : 6;
off64_t streamSize;
size_t frameSize, numFrames = 0;
int64_t duration = 0;
if (mDataSource->getSize(&streamSize) == OK) {
while (offset < streamSize) {
status_t status = getFrameSizeByOffset(source, offset, mIsWide, &frameSize);
if (status == ERROR_END_OF_STREAM) {
break;
} else if (status != OK) {
return;
}
if ((numFrames % 50 == 0) && (numFrames / 50 < OFFSET_TABLE_LEN)) {
CHECK_EQ(mOffsetTableLength, numFrames / 50);
mOffsetTable[mOffsetTableLength] = offset - (mIsWide ? 9: 6);
mOffsetTableLength ++;
}
offset += frameSize;
duration += 20000; // Each frame is 20ms
numFrames ++;
}
mMeta->setInt64(kKeyDuration, duration);
}
mInitCheck = OK;
}
MediaExtractor::ExtractorDef GETEXTRACTORDEF() {
return {
MediaExtractor::EXTRACTORDEF_VERSION,
UUID("c86639c9-2f31-40ac-a715-fa01b4493aaf"),
1,
"AMR Extractor",
[](
DataSourceBase *source,
float *confidence,
void **,
MediaExtractor::FreeMetaFunc *) -> MediaExtractor::CreatorFunc {
if (SniffAMR(source, nullptr, confidence)) {
return [](
DataSourceBase *source,
void *) -> MediaExtractor* {
return new AMRExtractor(source);};
}
return NULL;
}
};
}
AMRExtractor::AMRExtractor(const sp<DataSource> &source)
: mDataSource(source),
mInitCheck(NO_INIT),
mOffsetTableLength(0) {
String8 mimeType;
float confidence;
if (!SniffAMR(mDataSource, &mimeType, &confidence, NULL)) {
return;
}
mIsWide = (mimeType == MEDIA_MIMETYPE_AUDIO_AMR_WB);
mMeta = new MetaData;
mMeta->setCString(
kKeyMIMEType, mIsWide ? MEDIA_MIMETYPE_AUDIO_AMR_WB
: MEDIA_MIMETYPE_AUDIO_AMR_NB);
mMeta->setInt32(kKeyChannelCount, 1);
mMeta->setInt32(kKeySampleRate, mIsWide ? 16000 : 8000);
off64_t offset = mIsWide ? 9 : 6;
off64_t streamSize;
size_t frameSize, numFrames = 0;
int64_t duration = 0;
#ifdef MTK_AOSP_ENHANCEMENT
status_t ret = 0;
bool streamingFlag = mDataSource->flags() & DataSource::kIsCachingDataSource;
char *pData = new char [Buffer_Count_Readed];
ssize_t dataLen = 0;
size_t dataOffset = 0;
SXLOGD("AMRExtractor--is streaming flag=%d, pData:0x%x", streamingFlag, pData);
#endif
if (mDataSource->getSize(&streamSize) == OK) {
while (offset < streamSize) {
#ifdef MTK_AOSP_ENHANCEMENT
if (pData) {
if (dataLen==0) {
dataLen = mDataSource->readAt(offset, (void *)pData, Buffer_Count_Readed);
if (dataLen < 0) {
return;
}
dataOffset = 0;
}
ret = getFrameSizeByOffset_MMIO((uint8_t *)pData, dataLen, dataOffset, offset, mIsWide, &frameSize);
if (ret==NO_MEMORY) {
dataLen = 0;
continue;
}
}else {
ret = getFrameSizeByOffset(source, offset, mIsWide, &frameSize);
}
if (ret==ERROR_END_OF_STREAM) {
break;
}else if(ret!=OK) {
if (pData) delete [] pData;
pData = 0;
SXLOGD("AMRExtractor--getFrameSizeByOffset is not ok!");
return;
}
#else
if (getFrameSizeByOffset(source, offset, mIsWide, &frameSize) != OK) {
return;
}
#endif
if ((numFrames % 50 == 0) && (numFrames / 50 < OFFSET_TABLE_LEN)) {
CHECK_EQ(mOffsetTableLength, numFrames / 50);
mOffsetTable[mOffsetTableLength] = offset - (mIsWide ? 9: 6);
mOffsetTableLength ++;
}
#ifdef MTK_AOSP_ENHANCEMENT
else if(streamingFlag&&(numFrames>=50*OFFSET_TABLE_LEN)) {
duration += 20000*(streamSize - offset)/((offset - (mIsWide ? 9: 6))/(off64_t)numFrames);
SXLOGV("AMRExtractor--end duration=%lld, frame size = %lld", duration, (offset - (mIsWide ? 9: 6))/(off64_t)numFrames);
break;
}
#endif
offset += frameSize;
duration += 20000; // Each frame is 20ms
numFrames ++;
}
mMeta->setInt64(kKeyDuration, duration);
}
#ifdef MTK_AOSP_ENHANCEMENT
if (pData) delete [] pData;
pData = 0;
SXLOGD("AMRExtractor--constructor out -");
#endif
mInitCheck = OK;
}