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/* |
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* SID_Amiga.h - 6581 emulation, Amiga specific stuff |
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* |
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* Frodo (C) 1994-1997,2002-2005 Christian Bauer |
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* |
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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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|
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#include <dos/dostags.h> |
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#include <hardware/cia.h> |
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#include <proto/exec.h> |
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#include <proto/dos.h> |
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#include <proto/ahi.h> |
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#include <proto/graphics.h> |
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|
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|
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// Library bases |
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struct Library *AHIBase; |
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|
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// CIA-A base |
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extern struct CIA ciaa; |
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|
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|
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/* |
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* Initialization, create sub-process |
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*/ |
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|
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void DigitalRenderer::init_sound(void) |
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{ |
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// Find our (main) task |
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main_task = FindTask(NULL); |
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|
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// Create signal for communication |
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main_sig = AllocSignal(-1); |
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|
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// Create sub-process and wait until it is ready |
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if ((sound_process = CreateNewProcTags( |
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NP_Entry, (ULONG)&sub_invoc, |
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NP_Name, (ULONG)"Frodo Sound Process", |
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NP_Priority, 1, |
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NP_ExitData, (ULONG)this, // Easiest way to supply sub_invoc with this pointer |
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TAG_DONE)) != NULL) |
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Wait(1 << main_sig); |
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} |
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|
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|
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/* |
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* Destructor, delete sub-process |
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*/ |
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|
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DigitalRenderer::~DigitalRenderer() |
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{ |
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// Tell sub-process to quit and wait for completion |
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if (sound_process != NULL) { |
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Signal(&(sound_process->pr_Task), 1 << quit_sig); |
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Wait(1 << main_sig); |
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} |
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|
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// Free signal |
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FreeSignal(main_sig); |
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} |
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|
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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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|
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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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|
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/* |
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* Pause sound output |
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*/ |
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|
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void DigitalRenderer::Pause(void) |
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{ |
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if (sound_process != NULL) |
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Signal(&(sound_process->pr_Task), 1 << pause_sig); |
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} |
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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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|
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void DigitalRenderer::Resume(void) |
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{ |
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if (sound_process != NULL) |
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Signal(&(sound_process->pr_Task), 1 << resume_sig); |
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} |
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|
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|
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/* |
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* Sound sub-process |
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*/ |
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|
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void DigitalRenderer::sub_invoc(void) |
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{ |
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// Get pointer to the DigitalRenderer object and call sub_func() |
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DigitalRenderer *r = (DigitalRenderer *)((struct Process *)FindTask(NULL))->pr_ExitData; |
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r->sub_func(); |
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} |
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|
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void DigitalRenderer::sub_func(void) |
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{ |
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ahi_port = NULL; |
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ahi_io = NULL; |
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ahi_ctrl = NULL; |
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sample[0].ahisi_Address = sample[1].ahisi_Address = NULL; |
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ready = FALSE; |
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|
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// Create signals for communication |
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quit_sig = AllocSignal(-1); |
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pause_sig = AllocSignal(-1); |
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resume_sig = AllocSignal(-1); |
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ahi_sig = AllocSignal(-1); |
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|
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// Open AHI |
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if ((ahi_port = CreateMsgPort()) == NULL) |
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goto wait_for_quit; |
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if ((ahi_io = (struct AHIRequest *)CreateIORequest(ahi_port, sizeof(struct AHIRequest))) == NULL) |
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goto wait_for_quit; |
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ahi_io->ahir_Version = 2; |
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if (OpenDevice(AHINAME, AHI_NO_UNIT, (struct IORequest *)ahi_io, NULL)) |
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goto wait_for_quit; |
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AHIBase = (struct Library *)ahi_io->ahir_Std.io_Device; |
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|
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// Initialize callback hook |
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sf_hook.h_Entry = sound_func; |
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|
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// Open audio control structure |
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if ((ahi_ctrl = AHI_AllocAudio( |
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AHIA_AudioID, 0x0002000b, |
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AHIA_MixFreq, SAMPLE_FREQ, |
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AHIA_Channels, 1, |
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AHIA_Sounds, 2, |
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AHIA_SoundFunc, (ULONG)&sf_hook, |
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AHIA_UserData, (ULONG)this, |
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TAG_DONE)) == NULL) |
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goto wait_for_quit; |
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|
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// Prepare SampleInfos and load sounds (two sounds for double buffering) |
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sample[0].ahisi_Type = AHIST_M16S; |
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sample[0].ahisi_Length = SAMPLE_FREQ / CALC_FREQ; |
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sample[0].ahisi_Address = AllocVec(SAMPLE_FREQ / CALC_FREQ * 2, MEMF_PUBLIC | MEMF_CLEAR); |
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sample[1].ahisi_Type = AHIST_M16S; |
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sample[1].ahisi_Length = SAMPLE_FREQ / CALC_FREQ; |
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sample[1].ahisi_Address = AllocVec(SAMPLE_FREQ / CALC_FREQ * 2, MEMF_PUBLIC | MEMF_CLEAR); |
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if (sample[0].ahisi_Address == NULL || sample[1].ahisi_Address == NULL) |
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goto wait_for_quit; |
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AHI_LoadSound(0, AHIST_DYNAMICSAMPLE, &sample[0], ahi_ctrl); |
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AHI_LoadSound(1, AHIST_DYNAMICSAMPLE, &sample[1], ahi_ctrl); |
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|
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// Set parameters |
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play_buf = 0; |
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AHI_SetVol(0, 0x10000, 0x8000, ahi_ctrl, AHISF_IMM); |
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AHI_SetFreq(0, SAMPLE_FREQ, ahi_ctrl, AHISF_IMM); |
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AHI_SetSound(0, play_buf, 0, 0, ahi_ctrl, AHISF_IMM); |
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|
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// Start audio output |
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AHI_ControlAudio(ahi_ctrl, AHIC_Play, TRUE, TAG_DONE); |
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|
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// We are now ready for commands |
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ready = TRUE; |
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Signal(main_task, 1 << main_sig); |
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|
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// Accept and execute commands |
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for (;;) { |
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ULONG sigs = Wait((1 << quit_sig) | (1 << pause_sig) | (1 << resume_sig) | (1 << ahi_sig)); |
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|
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// Quit sub-process |
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if (sigs & (1 << quit_sig)) |
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goto quit; |
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|
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// Pause sound output |
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if (sigs & (1 << pause_sig)) |
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AHI_ControlAudio(ahi_ctrl, AHIC_Play, FALSE, TAG_DONE); |
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|
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// Resume sound output |
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if (sigs & (1 << resume_sig)) |
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AHI_ControlAudio(ahi_ctrl, AHIC_Play, TRUE, TAG_DONE); |
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|
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// Calculate next buffer |
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if (sigs & (1 << ahi_sig)) |
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calc_buffer((int16 *)(sample[play_buf].ahisi_Address), sample[play_buf].ahisi_Length * 2); |
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} |
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|
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wait_for_quit: |
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// Initialization failed, wait for quit signal |
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Wait(1 << quit_sig); |
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|
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quit: |
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// Free everything |
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if (ahi_ctrl != NULL) { |
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AHI_ControlAudio(ahi_ctrl, AHIC_Play, FALSE, TAG_DONE); |
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AHI_FreeAudio(ahi_ctrl); |
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CloseDevice((struct IORequest *)ahi_io); |
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} |
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|
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FreeVec(sample[0].ahisi_Address); |
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FreeVec(sample[1].ahisi_Address); |
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|
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if (ahi_io != NULL) |
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DeleteIORequest((struct IORequest *)ahi_io); |
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|
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if (ahi_port != NULL) |
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DeleteMsgPort(ahi_port); |
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|
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FreeSignal(quit_sig); |
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FreeSignal(pause_sig); |
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FreeSignal(resume_sig); |
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FreeSignal(ahi_sig); |
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|
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// Quit (synchronized with main task) |
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Forbid(); |
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Signal(main_task, 1 << main_sig); |
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} |
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|
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|
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/* |
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* AHI sound callback, play next buffer and signal sub-process |
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*/ |
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|
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ULONG DigitalRenderer::sound_func(void) |
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{ |
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register struct AHIAudioCtrl *ahi_ctrl asm ("a2"); |
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DigitalRenderer *r = (DigitalRenderer *)ahi_ctrl->ahiac_UserData; |
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r->play_buf ^= 1; |
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AHI_SetSound(0, r->play_buf, 0, 0, ahi_ctrl, 0); |
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Signal(&(r->sound_process->pr_Task), 1 << (r->ahi_sig)); |
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return 0; |
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} |
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|
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|
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/* |
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* Renderer for SID card |
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*/ |
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|
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// Renderer class |
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class SIDCardRenderer : public SIDRenderer { |
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public: |
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SIDCardRenderer(); |
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virtual ~SIDCardRenderer(); |
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|
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virtual void Reset(void); |
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virtual void EmulateLine(void) {} |
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virtual void WriteRegister(uint16 adr, uint8 byte); |
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virtual void NewPrefs(Prefs *prefs) {} |
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virtual void Pause(void) {} |
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virtual void Resume(void) {} |
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|
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private: |
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UBYTE *sid_base; // SID card base pointer |
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}; |
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|
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// Constructor: Reset SID |
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SIDCardRenderer::SIDCardRenderer() |
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{ |
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sid_base = (UBYTE *)0xa00001; |
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Reset(); |
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} |
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|
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// Destructor: Reset SID |
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SIDCardRenderer::~SIDCardRenderer() |
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{ |
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Reset(); |
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} |
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|
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// Reset SID |
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void SIDCardRenderer::Reset(void) |
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{ |
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WaitTOF(); |
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ciaa.ciapra |= CIAF_LED; |
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WaitTOF(); |
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ciaa.ciapra &= ~CIAF_LED; |
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} |
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|
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// Write to register |
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void SIDCardRenderer::WriteRegister(uint16 adr, uint8 byte) |
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{ |
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sid_base[adr << 1] = byte; |
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} |