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#include "sync_decoder.h"
#include <c10/util/Logging.h>
namespace ffmpeg {
SyncDecoder::AVByteStorage::AVByteStorage(size_t n) {
ensure(n);
}
SyncDecoder::AVByteStorage::~AVByteStorage() {
av_free(buffer_);
}
void SyncDecoder::AVByteStorage::ensure(size_t n) {
if (tail() < n) {
capacity_ = offset_ + length_ + n;
buffer_ = static_cast<uint8_t*>(av_realloc(buffer_, capacity_));
}
}
uint8_t* SyncDecoder::AVByteStorage::writableTail() {
TORCH_CHECK_LE(offset_ + length_, capacity_);
return buffer_ + offset_ + length_;
}
void SyncDecoder::AVByteStorage::append(size_t n) {
TORCH_CHECK_LE(n, tail());
length_ += n;
}
void SyncDecoder::AVByteStorage::trim(size_t n) {
TORCH_CHECK_LE(n, length_);
offset_ += n;
length_ -= n;
}
const uint8_t* SyncDecoder::AVByteStorage::data() const {
return buffer_ + offset_;
}
size_t SyncDecoder::AVByteStorage::length() const {
return length_;
}
size_t SyncDecoder::AVByteStorage::tail() const {
TORCH_CHECK_LE(offset_ + length_, capacity_);
return capacity_ - offset_ - length_;
}
void SyncDecoder::AVByteStorage::clear() {
offset_ = 0;
length_ = 0;
}
std::unique_ptr<ByteStorage> SyncDecoder::createByteStorage(size_t n) {
return std::make_unique<AVByteStorage>(n);
}
void SyncDecoder::onInit() {
eof_ = false;
queue_.clear();
}
int SyncDecoder::decode(DecoderOutputMessage* out, uint64_t timeoutMs) {
if (eof_ && queue_.empty()) {
return ENODATA;
}
if (queue_.empty()) {
int result = getFrame(timeoutMs);
// assign EOF
eof_ = result == ENODATA;
// check unrecoverable error, any error but ENODATA
if (result && result != ENODATA) {
return result;
}
// still empty
if (queue_.empty()) {
if (eof_) {
return ENODATA;
} else {
LOG(INFO) << "Queue is empty";
return ETIMEDOUT;
}
}
}
*out = std::move(queue_.front());
queue_.pop_front();
return 0;
}
void SyncDecoder::push(DecoderOutputMessage&& buffer) {
queue_.push_back(std::move(buffer));
}
} // namespace ffmpeg
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