forked from KolibriOS/kolibrios
171 lines
3.2 KiB
NASM
171 lines
3.2 KiB
NASM
format MS COFF
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include "snd.inc"
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include "proc32.inc"
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section '.text' align 16 code readable executable
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public _test_wav@4
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; convert WAVEHEADER into PCM_x_xx_xx constant
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align 4
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proc _test_wav@4 stdcall, hdr:dword
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mov eax, [hdr]
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cmp dword [eax], 0x46464952
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jne .fail
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cmp dword [eax+8], 0x45564157
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jne .fail
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cmp word [eax+20], 1
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jne .fail
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mov ecx, dword [eax+24]
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mov edx, 22050
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cmp ecx, edx
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ja .high
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je .l_22
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cmp ecx, 8000
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je .l_8
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cmp ecx, 11025
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je .l_11
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cmp ecx, 12000
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je .l_12
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cmp ecx, 16000
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je .l_16
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.fail:
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xor eax, eax
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ret
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.high:
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cmp ecx, 24000
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je .LN56
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cmp ecx, 32000
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je .LN65
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cmp ecx, 44100
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je .LN74
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cmp ecx, 48000
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jne .fail
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movzx ecx, word [eax+22]
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dec ecx
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je .LN79
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dec ecx
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jne .LN74
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mov edx, 19
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jmp .done
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.LN79:
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mov edx, 20
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jmp .done
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.LN74:
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movzx ecx, word [eax+22]
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dec ecx
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je .LN70
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dec ecx
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jne .LN65
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mov edx, 21
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jmp .done
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.LN70:
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mov edx, 22
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jmp .done
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.LN65:
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movzx ecx, word [eax+22]
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dec ecx
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je .LN61
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dec ecx
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jne .LN56
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mov edx, 23
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jmp .done
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.LN61:
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mov edx, 24
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jmp .done
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.LN56:
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movzx ecx, word [eax+22]
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dec ecx
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je .LN52
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dec ecx
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je .LN50
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.l_22:
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movzx ecx, word [eax+22]
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dec ecx
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je .LN43
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dec ecx
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je .LN41
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.l_16:
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movzx ecx, word [eax+22]
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dec ecx
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je .LN34
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dec ecx
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je .LN32
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.l_12:
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movzx ecx, word [eax+22]
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dec ecx
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je .LN25
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dec ecx
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je .LN23
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.l_11:
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movzx ecx, word [eax+22]
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dec ecx
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je .LN16
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dec ecx
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je .LN14
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.l_8:
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movzx ecx, word [eax+22]
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dec ecx
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je .LN7
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dec ecx
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jne .fail
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mov edx, 35
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jmp .done
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.LN7:
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mov edx, 36
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jmp .done
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.LN14:
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mov edx, 33
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jmp .done
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.LN16:
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mov edx, 34
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jmp .done
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.LN23:
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mov edx, 31
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jmp .done
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.LN25:
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mov edx, 32
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jmp .done
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.LN32:
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mov edx, 29
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jmp .done
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.LN34:
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mov edx, 30
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jmp .done
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.LN41:
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mov edx, 27
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jmp .done
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.LN43:
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mov edx, 28
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jmp .done
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.LN50:
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mov edx, 25
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jmp .done
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.LN52:
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mov edx, 26
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.done:
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xor ecx, ecx
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cmp word [eax+34], 16
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setne cl
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dec ecx
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and ecx, -18
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add ecx, edx
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mov eax, ecx
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ret
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endp
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