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LibVideo: Make VP9::Decoder a subclass of a new abstract VideoDecoder

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This will allow other decoders to be used in place of VP9::Decoder when
new video decoders are implemented, such as AV1.
This commit is contained in:
Zaggy1024 2022-10-29 19:53:24 -05:00 • committed by Andreas Kling
parent 3720f66bb1
commit 2b4b6c5613
4 changed files with 34 additions and 12 deletions
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6
Userland/Applications/VideoPlayer/main.cpp
View file

@ -49,7 +49,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
main_widget->set_layout<GUI::VerticalBoxLayout>();
auto image_widget = TRY(main_widget->try_add<GUI::ImageWidget>());
Video::VP9::Decoder vp9_decoder;
OwnPtr<Video::VideoDecoder> decoder = make<Video::VP9::Decoder>();
size_t cluster_index = 0;
size_t block_index = 0;
size_t frame_index = 0;
@ -76,14 +76,14 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
if (!optional_sample.has_value())
return;
auto result = vp9_decoder.receive_sample(optional_sample.release_value());
auto result = decoder->receive_sample(optional_sample.release_value());
if (result.is_error()) {
outln("Error decoding frame {}: {}", frame_number, result.error().string_literal());
return;
}
auto frame_result = vp9_decoder.get_decoded_frame();
auto frame_result = decoder->get_decoded_frame();
if (frame_result.is_error()) {
outln("Error retrieving frame {}: {}", frame_number, frame_result.error().string_literal());
return;

5
Userland/Libraries/LibVideo/VP9/Decoder.cpp
View file

@ -42,11 +42,6 @@ DecoderErrorOr<void> Decoder::receive_sample(Span<u8 const> chunk_data)
return {};
}
DecoderErrorOr<void> Decoder::receive_sample(ByteBuffer const& chunk_data)
{
return receive_sample(chunk_data.span());
}
void Decoder::dump_frame_info()
{
m_parser->dump_info();

9
Userland/Libraries/LibVideo/VP9/Decoder.h
View file

@ -13,23 +13,24 @@
#include <AK/Span.h>
#include <LibVideo/Color/CodingIndependentCodePoints.h>
#include <LibVideo/DecoderError.h>
#include <LibVideo/VideoDecoder.h>
#include <LibVideo/VideoFrame.h>
#include "Parser.h"
namespace Video::VP9 {
class Decoder {
class Decoder : public VideoDecoder {
friend class Parser;
public:
Decoder();
~Decoder() override { }
/* (8.1) General */
DecoderErrorOr<void> receive_sample(Span<u8 const>);
DecoderErrorOr<void> receive_sample(ByteBuffer const&);
DecoderErrorOr<void> receive_sample(Span<u8 const>) override;
void dump_frame_info();
DecoderErrorOr<NonnullOwnPtr<VideoFrame>> get_decoded_frame();
DecoderErrorOr<NonnullOwnPtr<VideoFrame>> get_decoded_frame() override;
private:
typedef i32 Intermediate;

26
Userland/Libraries/LibVideo/VideoDecoder.h Normal file
View file

@ -0,0 +1,26 @@
/*
* Copyright (c) 2022, Gregory Bertilson <zaggy1024@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/ByteBuffer.h>
#include <AK/NonnullOwnPtr.h>
#include "DecoderError.h"
#include "VideoFrame.h"
namespace Video {
class VideoDecoder {
public:
virtual ~VideoDecoder() {};
virtual DecoderErrorOr<void> receive_sample(Span<u8 const> sample) = 0;
DecoderErrorOr<void> receive_sample(ByteBuffer const& sample) { return receive_sample(sample.span()); }
virtual DecoderErrorOr<NonnullOwnPtr<VideoFrame>> get_decoded_frame() = 0;
};
}