Stu Leak
68df790d27
Major improvements to UnifiedPlayer: 1. GetFrameImage() now works when paused for responsive UI updates 2. Play() method properly starts FFmpeg process 3. Frame display loop runs continuously for smooth video display 4. Disabled audio temporarily to fix video playback fundamentals 5. Simplified FFmpeg command to focus on video stream only Player now: - Generates video frames correctly - Shows video when paused - Has responsive progress tracking - Starts playback properly Next steps: Re-enable audio playback once video is stable
76 lines
1.8 KiB
ArmAsm
76 lines
1.8 KiB
ArmAsm
// SPDX-License-Identifier: Apache-2.0
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// SPDX-FileCopyrightText: 2025 The Ebitengine Authors
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//go:build linux
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#include "textflag.h"
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#include "go_asm.h"
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#include "funcdata.h"
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#include "abi_loong64.h"
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TEXT callbackasm1(SB), NOSPLIT|NOFRAME, $0
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NO_LOCAL_POINTERS
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SUBV $(16*8), R3, R14
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MOVD F0, 0(R14)
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MOVD F1, 8(R14)
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MOVD F2, 16(R14)
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MOVD F3, 24(R14)
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MOVD F4, 32(R14)
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MOVD F5, 40(R14)
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MOVD F6, 48(R14)
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MOVD F7, 56(R14)
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MOVV R4, 64(R14)
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MOVV R5, 72(R14)
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MOVV R6, 80(R14)
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MOVV R7, 88(R14)
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MOVV R8, 96(R14)
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MOVV R9, 104(R14)
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MOVV R10, 112(R14)
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MOVV R11, 120(R14)
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// Adjust SP by frame size.
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SUBV $(22*8), R3
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// It is important to save R30 because the go assembler
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// uses it for move instructions for a variable.
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// This line:
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// MOVV ·callbackWrap_call(SB), R4
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// Creates the instructions:
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// PCALAU12I off1(PC), R30
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// MOVV off2(R30), R4
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// R30 is a callee saved register so we are responsible
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// for ensuring its value doesn't change. So save it and
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// restore it at the end of this function.
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// R1 is the link register. crosscall2 doesn't save it
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// so it's saved here.
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MOVV R1, 0(R3)
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MOVV R30, 8(R3)
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// Create a struct callbackArgs on our stack.
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MOVV $(callbackArgs__size)(R3), R13
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MOVV R12, callbackArgs_index(R13) // callback index
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MOVV R14, callbackArgs_args(R13) // address of args vector
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MOVV $0, callbackArgs_result(R13) // result
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// Move parameters into registers
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// Get the ABIInternal function pointer
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// without <ABIInternal> by using a closure.
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MOVV ·callbackWrap_call(SB), R4
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MOVV (R4), R4 // fn unsafe.Pointer
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MOVV R13, R5 // frame (&callbackArgs{...})
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MOVV $0, R7 // ctxt uintptr
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JAL crosscall2(SB)
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// Get callback result.
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MOVV $(callbackArgs__size)(R3), R13
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MOVV callbackArgs_result(R13), R4
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// Restore LR and R30
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MOVV 0(R3), R1
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MOVV 8(R3), R30
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ADDV $(22*8), R3
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RET
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