Merge cherrypicks of [15940261] into sc-qpr1-release.

                    if (!in_buf->meta_data().findInt32(kKeyValidSamples, &numPageSamples)) {

                        numPageSamples = -1;

                    }

                    if (cpLen + sizeof(numPageSamples) <= in_buffer->capacity()) {

                        memcpy(in_buffer->base() + cpLen, &numPageSamples, sizeof(numPageSamples));

                        cpLen += sizeof(numPageSamples);

                    } else {

                        ALOGW("Didn't have enough space to copy kKeyValidSamples");

                    }

                }

                res = mCodec->queueInputBuffer(

                        in_ix, 0 /* offset */, in_buf->range_length() + (mIsVorbis ? 4 : 0),

                        in_ix, 0 /* offset */, cpLen,

                        timestampUs, 0 /* flags */);

                if (res != OK) {

                    ALOGI("[%s] failed to queue input buffer #%zu", mComponentName.c_str(), in_ix);