sp<MetaData> setMPEG4Format(AVCodecContext *avctx)
{
ALOGV("MPEG4");
sp<ABuffer> csd = new ABuffer(avctx->extradata_size);
memcpy(csd->data(), avctx->extradata, avctx->extradata_size);
sp<ABuffer> esds = MakeMPEGVideoESDS(csd);
sp<MetaData> meta = new MetaData;
meta->setData(kKeyESDS, kTypeESDS, esds->data(), esds->size());
meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG4);
return meta;
}
status_t ESExtractor::Track::dequeueAccessUnitMPEGVideo(sp<ABuffer> &mAccessUnit) {
const uint8_t *data = mExtractor->mBuffer->data();
size_t size = mExtractor->mBuffer->size();
bool sawPictureStart = false;
int pprevStartCode = -1;
int prevStartCode = -1;
int currentStartCode = -1;
size_t offset = 0;
size_t lastGOPOff = -1;
while (offset + 3 < size) {
if (U24_AT(data + offset) != 0x000001) {
++offset;
continue;
}
pprevStartCode = prevStartCode;
prevStartCode = currentStartCode;
currentStartCode = data[offset + 3];
ALOGV("pprevStartCode:0x%x,prevStartCode:0x%x,currentStartCode:0x%x,offset:%d",pprevStartCode,prevStartCode,currentStartCode,offset);
if (currentStartCode == 0xb3 && mQueueFormat == NULL) {
memmove(mExtractor->mBuffer->data(), mExtractor->mBuffer->data() + offset, size - offset);
size -= offset;
offset = 0;
mExtractor->mBuffer->setRange(0, size);
}
if ((prevStartCode == 0xb3 && currentStartCode != 0xb5)
|| (pprevStartCode == 0xb3 && prevStartCode == 0xb5)) {
// seqHeader without/with extension
if (mQueueFormat == NULL) {
CHECK_GE(size, 7u);
unsigned width =
(data[4] << 4) | data[5] >> 4;
unsigned height =
((data[5] & 0x0f) << 8) | data[6];
mQueueFormat = new MetaData;
mQueueFormat->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG2);
mQueueFormat->setInt32(kKeyWidth, (int32_t)width);
mQueueFormat->setInt32(kKeyHeight, (int32_t)height);
ALOGI("found MPEG2 video codec config (%d x %d)", width, height);
sp<ABuffer> csd = new ABuffer(offset);
memcpy(csd->data(), data, offset);
memmove(mExtractor->mBuffer->data(),
mExtractor->mBuffer->data() + offset,
mExtractor->mBuffer->size() - offset);
mExtractor->mBuffer->setRange(0, mExtractor->mBuffer->size() - offset);
size -= offset;
offset = 0;
sp<ABuffer> esds = MakeMPEGVideoESDS(csd);
mQueueFormat->setData(kKeyESDS, kTypeESDS, esds->data(), esds->size());
ALOGV("dequeueAccessUnitMPEGVideo:get mQueueFormat,return GETFORMATDONE");
return GETFORMATDONE;
}
}
if (mQueueFormat != NULL && (currentStartCode == 0x00 || (sawPictureStart && currentStartCode == 0xB7))) { //ALPS00473447
// Picture start
ALOGV("dequeueAccessUnitMPEGVideo:Picture start");
if (!sawPictureStart) {
sawPictureStart = true;
} else {
mAccessUnit = new ABuffer(offset);
memcpy(mAccessUnit->data(), data, offset);
memmove(mExtractor->mBuffer->data(),
mExtractor->mBuffer->data() + offset,
mExtractor->mBuffer->size() - offset);
mExtractor->mBuffer->setRange(0, mExtractor->mBuffer->size() - offset);
offset = 0;
mAccessUnit->meta()->setInt32("invt", (int32_t)true);
mAccessUnit->meta()->setInt64("timeUs", 0);
ALOGV("dequeueAccessUnitMPEGVideo:return OPCONTINUE");
return GETAUDONE;
}
}
++offset;
}
