69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <wchar.h>
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#include "../86box.h"
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#include "../ibm.h"
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#include "sound.h"
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#include "snd_speaker.h"
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int speaker_mute = 0;
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int speaker_gated = 0;
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int speaker_enable = 0, was_speaker_enable = 0;
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int gated,speakval,speakon;
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static int16_t speaker_buffer[SOUNDBUFLEN];
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static int speaker_pos = 0;
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void speaker_update(void)
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{
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int16_t val;
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for (; speaker_pos < sound_pos_global; speaker_pos++)
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{
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if (speaker_gated && was_speaker_enable)
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{
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if (!pit.m[2] || pit.m[2]==4)
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val = speakval;
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else if (pit.l[2] < 0x40)
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val = 0xa00;
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else
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val = speakon ? 0x1400 : 0;
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}
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else
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val = was_speaker_enable ? 0x1400 : 0;
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if (!speaker_enable)
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was_speaker_enable = 0;
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speaker_buffer[speaker_pos] = val;
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}
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}
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static void speaker_get_buffer(int32_t *buffer, int len, void *p)
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{
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int c;
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speaker_update();
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if (!speaker_mute)
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{
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for (c = 0; c < len * 2; c++)
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buffer[c] += speaker_buffer[c >> 1];
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}
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speaker_pos = 0;
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}
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void speaker_init(void)
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{
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sound_add_handler(speaker_get_buffer, NULL);
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speaker_mute = 0;
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}
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