171 lines
4.2 KiB
C++
171 lines
4.2 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id$
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2011-2014 The Bochs Project
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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// Common sound module code and dummy sound lowlevel functions
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// Define BX_PLUGGABLE in files that can be compiled into plugins. For
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// platforms that require a special tag on exported symbols, BX_PLUGGABLE
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// is used to know when we are exporting symbols and when we are importing.
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#define BX_PLUGGABLE
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#include "iodev.h"
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#if BX_SUPPORT_SOUNDLOW
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#include "soundlow.h"
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// The dummy sound lowlevel functions. They don't do anything.
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bx_sound_lowlevel_c::bx_sound_lowlevel_c()
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{
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put("soundlow", "SNDLOW");
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record_timer_index = BX_NULL_TIMER_HANDLE;
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}
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bx_sound_lowlevel_c::~bx_sound_lowlevel_c()
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{
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}
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int bx_sound_lowlevel_c::waveready()
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{
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::midiready()
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{
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::openmidioutput(const char *mididev)
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{
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UNUSED(mididev);
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::sendmidicommand(int delta, int command, int length, Bit8u data[])
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{
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UNUSED(delta);
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UNUSED(command);
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UNUSED(length);
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UNUSED(data);
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::closemidioutput()
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{
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::openwaveoutput(const char *wavedev)
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{
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UNUSED(wavedev);
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::startwaveplayback(int frequency, int bits, bx_bool stereo, int format)
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{
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UNUSED(frequency);
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UNUSED(bits);
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UNUSED(stereo);
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UNUSED(format);
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::sendwavepacket(int length, Bit8u data[])
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{
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UNUSED(length);
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UNUSED(data);
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::stopwaveplayback()
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{
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::closewaveoutput()
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{
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::openwaveinput(const char *wavedev, sound_record_handler_t rh)
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{
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UNUSED(wavedev);
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record_handler = rh;
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if (rh != NULL) {
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record_timer_index = bx_pc_system.register_timer(this, record_timer_handler, 1, 1, 0, "soundmod");
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// record timer: inactive, continuous, frequency variable
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}
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::startwaverecord(int frequency, int bits, bx_bool stereo, int format)
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{
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Bit64u timer_val;
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Bit8u shift = 0;
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UNUSED(format);
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if (record_timer_index != BX_NULL_TIMER_HANDLE) {
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if (bits == 16) shift++;
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if (stereo) shift++;
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record_packet_size = (frequency / 10) << shift; // 0.1 sec
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if (record_packet_size > BX_SOUNDLOW_WAVEPACKETSIZE) {
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record_packet_size = BX_SOUNDLOW_WAVEPACKETSIZE;
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}
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timer_val = (Bit64u)record_packet_size * 1000000 / (frequency << shift);
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bx_pc_system.activate_timer(record_timer_index, (Bit32u)timer_val, 1);
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}
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::getwavepacket(int length, Bit8u data[])
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{
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memset(data, 0, length);
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::stopwaverecord()
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{
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if (record_timer_index != BX_NULL_TIMER_HANDLE) {
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bx_pc_system.deactivate_timer(record_timer_index);
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}
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return BX_SOUNDLOW_OK;
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}
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int bx_sound_lowlevel_c::closewaveinput()
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{
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stopwaverecord();
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return BX_SOUNDLOW_OK;
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}
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void bx_sound_lowlevel_c::record_timer_handler(void *this_ptr)
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{
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bx_sound_lowlevel_c *class_ptr = (bx_sound_lowlevel_c *) this_ptr;
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class_ptr->record_timer();
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}
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void bx_sound_lowlevel_c::record_timer(void)
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{
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record_handler(this, record_packet_size);
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}
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#endif
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