99 lines
1.5 KiB
C
99 lines
1.5 KiB
C
/*
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* SID_linux.i - 6581 emulation, Linux specific stuff
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*
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* Frodo (C) 1994-1997,2002 Christian Bauer
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* Wii sound stuff by Simon Kagstrom
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*/
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#include "gcaudio.h"
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#include "VIC.h"
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#include "Network.h"
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/*
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* Initialization
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*/
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void DigitalRenderer::init_sound(void)
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{
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this->sndbufsize = 512;
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ready = false;
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InitialiseAudio();
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ResetAudio();
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this->sound_buffer = new int16[this->sndbufsize];
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memset(this->sound_buffer, 0, sizeof(int16) * this->sndbufsize);
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ready = true;
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}
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/*
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* Destructor
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*/
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DigitalRenderer::~DigitalRenderer()
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{
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StopAudio();
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}
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/*
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* Pause sound output
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*/
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void DigitalRenderer::Pause(void)
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{
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StopAudio();
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}
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/*
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* Resume sound output
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*/
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void DigitalRenderer::Resume(void)
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{
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/* Done by PlayAudio() */
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}
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/*
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* Fill buffer, sample volume (for sampled voice)
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*/
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void DigitalRenderer::PushVolume(uint8 volume)
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{
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static int divisor = 0;
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static int to_output = 0;
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sample_buf[sample_in_ptr] = volume;
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sample_in_ptr = (sample_in_ptr + 1) % SAMPLE_BUF_SIZE;
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/*
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* Now see how many samples have to be added for this line
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*/
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divisor += SAMPLE_FREQ;
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while (divisor >= 0)
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divisor -= TOTAL_RASTERS*SCREEN_FREQ, to_output++;
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/*
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* Calculate the sound data only when we have enough to fill
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* the buffer entirely.
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*/
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if (to_output >= sndbufsize) {
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int datalen = sndbufsize;
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to_output -= datalen;
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calc_buffer(sound_buffer, datalen * 2);
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PlaySound(sound_buffer, datalen);
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}
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}
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void DigitalRenderer::EmulateLine(void)
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{
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if (!ready || TheC64->IsPaused())
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return;
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this->PushVolume(volume);
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}
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