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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_BASE_DECODER_BUFFER_SIDE_DATA_H_
#define MEDIA_BASE_DECODER_BUFFER_SIDE_DATA_H_
#include <stdint.h>
#include <optional>
#include <variant>
#include <vector>
#include "base/containers/heap_array.h"
#include "base/time/time.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/media_export.h"
#include "media/base/video_decoder_config.h"
namespace media {
struct MEDIA_EXPORT DecoderBufferSideData {
DecoderBufferSideData();
~DecoderBufferSideData();
DecoderBufferSideData(const DecoderBufferSideData&) = delete;
DecoderBufferSideData operator=(DecoderBufferSideData&) = delete;
DecoderBufferSideData& operator=(DecoderBufferSideData&& other);
DecoderBufferSideData(DecoderBufferSideData&& other);
// Returns true if all the fields in the other struct match ours.
bool Matches(const DecoderBufferSideData& other) const;
// Copies all the fields into a new DecoderBufferSideData and returns it.
std::unique_ptr<DecoderBufferSideData> Clone() const;
// VP9 specific information.
std::vector<uint32_t> spatial_layers;
base::HeapArray<uint8_t> alpha_data;
// ITU-T35 metadata.
base::HeapArray<uint8_t> itu_t35_data;
// Secure buffer handle corresponding to the decrypted contents of the
// associated DecoderBuffer. A non-zero value indicates this was set.
//
// Required by some hardware content protection mechanisms to ensure the
// decrypted buffer never leaves secure memory. When set, this DecoderBuffer
// generally carries the partially (headers in the clear) encrypted payload;
uint64_t secure_handle = 0;
// Duration of (audio) samples from the beginning and end of this frame
// which should be discarded after decoding. A value of kInfiniteDuration
// for the first value indicates the entire frame should be discarded; the
// second value must be base::TimeDelta() in this case.
using DiscardPadding = std::pair<base::TimeDelta, base::TimeDelta>;
DiscardPadding discard_padding;
// If set, it signals that the current end of stream buffer is for a config
// change. The upcoming config may be used by the decoder to make more optimal
// decisions around reallocation and flushing. Only set on EOS buffers.
using ConfigVariant = std::variant<AudioDecoderConfig, VideoDecoderConfig>;
std::optional<ConfigVariant> next_config;
};
} // namespace media
#endif // MEDIA_BASE_DECODER_BUFFER_SIDE_DATA_H_
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