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https://github.com/LadybirdBrowser/ladybird
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a4f126554d
Add IPC messages and server-side implementation for streaming animated image decode. Instead of decoding all frames upfront, only decode an initial batch and keep the decoder alive for on-demand frame requests. New IPC messages: - request_animation_frames: request decode of a batch of frames - stop_animation_decode: clean up a decode session - did_decode_animation_frames: deliver decoded frames to client - did_fail_animation_decode: report decode errors The existing did_decode_image message gains a session_id parameter (0 for single-shot decode, non-zero for streaming sessions).
77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/HashMap.h>
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#include <ImageDecoder/Forward.h>
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#include <ImageDecoder/ImageDecoderClientEndpoint.h>
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#include <ImageDecoder/ImageDecoderServerEndpoint.h>
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#include <LibCore/AnonymousBuffer.h>
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#include <LibGfx/BitmapSequence.h>
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#include <LibGfx/ColorSpace.h>
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#include <LibGfx/ImageFormats/ImageDecoder.h>
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#include <LibIPC/ConnectionFromClient.h>
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#include <LibThreading/BackgroundAction.h>
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namespace ImageDecoder {
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class ConnectionFromClient final
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: public IPC::ConnectionFromClient<ImageDecoderClientEndpoint, ImageDecoderServerEndpoint> {
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C_OBJECT(ConnectionFromClient);
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public:
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~ConnectionFromClient() override = default;
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virtual void die() override;
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struct DecodeResult {
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bool is_animated = false;
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u32 loop_count = 0;
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u32 frame_count = 0;
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Gfx::FloatPoint scale { 1, 1 };
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Gfx::BitmapSequence bitmaps;
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Vector<u32> durations;
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Gfx::ColorSpace color_profile;
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// Non-null for streaming animated sessions:
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RefPtr<Gfx::ImageDecoder> decoder;
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Core::AnonymousBuffer encoded_data;
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};
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struct AnimationSession {
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Core::AnonymousBuffer encoded_data;
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RefPtr<Gfx::ImageDecoder> decoder;
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u32 frame_count { 0 };
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};
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private:
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using Job = Threading::BackgroundAction<DecodeResult>;
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using FrameDecodeResult = Vector<Gfx::ImageFrameDescriptor>;
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using FrameDecodeJob = Threading::BackgroundAction<FrameDecodeResult>;
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explicit ConnectionFromClient(NonnullOwnPtr<IPC::Transport>);
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virtual Messages::ImageDecoderServer::DecodeImageResponse decode_image(Core::AnonymousBuffer, Optional<Gfx::IntSize> ideal_size, Optional<ByteString> mime_type) override;
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virtual void cancel_decoding(i64 image_id) override;
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virtual void request_animation_frames(i64 session_id, u32 start_frame_index, u32 count) override;
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virtual void stop_animation_decode(i64 session_id) override;
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virtual Messages::ImageDecoderServer::ConnectNewClientsResponse connect_new_clients(size_t count) override;
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virtual Messages::ImageDecoderServer::InitTransportResponse init_transport(int peer_pid) override;
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ErrorOr<IPC::File> connect_new_client();
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NonnullRefPtr<Job> make_decode_image_job(i64 image_id, Core::AnonymousBuffer, Optional<Gfx::IntSize> ideal_size, Optional<ByteString> mime_type);
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i64 m_next_image_id { 0 };
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i64 m_next_session_id { 1 };
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HashMap<i64, NonnullRefPtr<Job>> m_pending_jobs;
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HashMap<i64, NonnullOwnPtr<AnimationSession>> m_animation_sessions;
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HashMap<i64, NonnullRefPtr<FrameDecodeJob>> m_pending_frame_jobs;
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};
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}
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