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cebix |
1.1 |
/* |
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* SID_Be.h - 6581 emulation, Be specific stuff |
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* |
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cebix |
1.2 |
* Frodo (C) 1994-1997,2002-2003 Christian Bauer |
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cebix |
1.1 |
* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include <MediaKit.h> |
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#include "C64.h" |
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/* |
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* Initialization, open subscriber |
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*/ |
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void DigitalRenderer::init_sound(void) |
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{ |
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in_stream = false; |
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the_stream = new BDACStream(); |
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the_sub = new BSubscriber("Frodo SID emulation"); |
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ready = the_sub->Subscribe(the_stream) == B_NO_ERROR; |
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if (ready) { |
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the_stream->SetSamplingRate(SAMPLE_FREQ); |
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the_stream->SetStreamBuffers(SAMPLE_FREQ / CALC_FREQ * 4, 4); // Must be called after EnterStream() |
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the_sub->EnterStream(NULL, true, this, stream_func, NULL, true); |
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in_stream = true; |
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} |
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} |
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/* |
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* Destructor, close subscriber |
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*/ |
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DigitalRenderer::~DigitalRenderer() |
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{ |
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if (ready) { |
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if (in_stream) { |
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the_sub->ExitStream(true); |
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in_stream = false; |
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} |
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the_stream->SetStreamBuffers(4096, 8); |
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the_sub->Unsubscribe(); |
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ready = false; |
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} |
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delete the_sub; |
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delete the_stream; |
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} |
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/* |
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* Sample volume (for sampled voice) |
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*/ |
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void DigitalRenderer::EmulateLine(void) |
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{ |
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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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/* |
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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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if (in_stream) { |
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the_sub->ExitStream(true); |
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in_stream = false; |
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} |
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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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if (!in_stream) { |
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the_sub->EnterStream(NULL, true, this, stream_func, NULL, true); |
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in_stream = true; |
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} |
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} |
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/* |
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* Stream function |
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*/ |
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bool DigitalRenderer::stream_func(void *arg, char *buf, size_t count, void *header) |
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{ |
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((DigitalRenderer *)arg)->calc_buffer((int16 *)buf, count); |
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((DigitalRenderer *)arg)->the_c64->SoundSync(); |
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return true; |
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} |
