status_t DataConverter::convert(const sp<MediaCodecBuffer> &source, sp<MediaCodecBuffer> &target) {
CHECK(source->base() != target->base());
size_t size = targetSize(source->size());
status_t err = OK;
if (size > target->capacity()) {
ALOGE("data size (%zu) is greater than buffer capacity (%zu)",
size, // this is the data received/to be converted
target->capacity()); // this is out buffer size
err = FAILED_TRANSACTION;
} else {
err = safeConvert(source, target);
}
target->setRange(0, err == OK ? size : 0);
return err;
}
status_t NuMediaExtractor::readSampleData(const sp<ABuffer> &buffer) {
Mutex::Autolock autoLock(mLock);
ssize_t minIndex = fetchTrackSamples();
if (minIndex < 0) {
return ERROR_END_OF_STREAM;
}
TrackInfo *info = &mSelectedTracks.editItemAt(minIndex);
size_t sampleSize = info->mSample->range_length();
if (info->mTrackFlags & kIsVorbis) {
// Each sample's data is suffixed by the number of page samples
// or -1 if not available.
sampleSize += sizeof(int32_t);
}
if (buffer->capacity() < sampleSize) {
return -ENOMEM;
}
const uint8_t *src =
(const uint8_t *)info->mSample->data()
+ info->mSample->range_offset();
memcpy((uint8_t *)buffer->data(), src, info->mSample->range_length());
if (info->mTrackFlags & kIsVorbis) {
int32_t numPageSamples;
if (!info->mSample->meta_data()->findInt32(
kKeyValidSamples, &numPageSamples)) {
numPageSamples = -1;
}
memcpy((uint8_t *)buffer->data() + info->mSample->range_length(),
&numPageSamples,
sizeof(numPageSamples));
}
buffer->setRange(0, sampleSize);
return OK;
}
