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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_BASE_DECODER_H_
#define MEDIA_BASE_DECODER_H_
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "media/base/media_export.h"
#include "media/base/status.h"
namespace media {
// List of known AudioDecoder implementations; recorded to UKM, always add new
// values to the end and do not reorder or delete values from this list.
enum class AudioDecoderType : int {
kUnknown = 0, // Decoder name string is not recognized or n/a.
kFFmpeg = 1, // FFmpegAudioDecoder
kMojo = 2, // MojoAudioDecoder
kDecrypting = 3, // DecryptingAudioDecoder
kMediaCodec = 4, // MediaCodecAudioDecoder (Android)
kBroker = 5, // AudioDecoderBroker
kTesting = 6, // Never send this to UKM, for tests only.
// Keep this at the end and equal to the last entry.
kMaxValue = kTesting,
};
// List of known VideoDecoder implementations; recorded to UKM, always add new
// values to the end and do not reorder or delete values from this list.
enum class VideoDecoderType : int {
kUnknown = 0, // Decoder name string is not recognized or n/a.
// kGpu = 1, // GpuVideoDecoder (DEPRECATED)
kFFmpeg = 2, // FFmpegVideoDecoder
kVpx = 3, // VpxVideoDecoder
kAom = 4, // AomVideoDecoder
kMojo = 5, // MojoVideoDecoder
kDecrypting = 6, // DecryptingVideoDecoder
kDav1d = 7, // Dav1dVideoDecoder
kFuchsia = 8, // FuchsiaVideoDecoder
kMediaCodec = 9, // MediaCodecVideoDecoder (Android)
kGav1 = 10, // Gav1VideoDecoder
kD3D11 = 11, // D3D11VideoDecoder
kVaapi = 12, // VaapiVideoDecoder
kBroker = 13, // VideoDecoderBroker (Webcodecs)
kVda = 14, // VDAVideoDecoder
// kChromeOs = 15, // DEPRECATED, should be kVaapi or kV4L2 instead.
kV4L2 = 16, // V4L2VideoDecoder
kTesting = 17, // Never send this to UKM, for tests only.
// Keep this at the end and equal to the last entry.
kMaxValue = kTesting
};
MEDIA_EXPORT std::string GetDecoderName(AudioDecoderType type);
MEDIA_EXPORT std::string GetDecoderName(VideoDecoderType type);
MEDIA_EXPORT std::ostream& operator<<(std::ostream& out, AudioDecoderType type);
MEDIA_EXPORT std::ostream& operator<<(std::ostream& out, VideoDecoderType type);
class MEDIA_EXPORT Decoder {
public:
virtual ~Decoder();
// Returns true if the implementation is expected to be implemented by the
// platform. The value should be available immediately after construction and
// should not change within the lifetime of a decoder instance.
virtual bool IsPlatformDecoder() const;
// Returns true if the implementation supports decoding configs with
// encryption.
// TODO(crbug.com/1099488): Sometimes it's not possible to give a definitive
// yes or no answer unless more context is given. While this doesn't pose any
// problems, it does allow incompatible decoders to pass the filtering step in
// |DecoderSelector| potentially slowing down the selection process.
virtual bool SupportsDecryption() const;
protected:
Decoder();
};
} // namespace media
#endif // MEDIA_BASE_DECODER_H_
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