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#pragma once
#include <list>
#include "decoder.h"
namespace ffmpeg {
/**
* Class uses FFMPEG library to decode media streams.
* Media bytes can be explicitly provided through read-callback
* or fetched internally by FFMPEG library
*/
class SyncDecoder : public Decoder {
public:
// Allocation of memory must be done with a proper alignment.
class AVByteStorage : public ByteStorage {
public:
explicit AVByteStorage(size_t n);
~AVByteStorage() override;
void ensure(size_t n) override;
uint8_t* writableTail() override;
void append(size_t n) override;
void trim(size_t n) override;
const uint8_t* data() const override;
size_t length() const override;
size_t tail() const override;
void clear() override;
private:
size_t offset_{0};
size_t length_{0};
size_t capacity_{0};
uint8_t* buffer_{nullptr};
};
public:
int decode(DecoderOutputMessage* out, uint64_t timeoutMs) override;
private:
void push(DecoderOutputMessage&& buffer) override;
void onInit() override;
std::unique_ptr<ByteStorage> createByteStorage(size_t n) override;
private:
std::list<DecoderOutputMessage> queue_;
bool eof_{false};
};
} // namespace ffmpeg
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