diff options
Diffstat (limited to 'hw/pcspk.c')
| -rw-r--r-- | hw/pcspk.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/hw/pcspk.c b/hw/pcspk.c deleted file mode 100644 index d533415950..0000000000 --- a/hw/pcspk.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * QEMU PC speaker emulation - * - * Copyright (c) 2006 Joachim Henke - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "hw/hw.h" -#include "hw/pc.h" -#include "hw/isa.h" -#include "audio/audio.h" -#include "qemu/timer.h" -#include "hw/i8254.h" -#include "hw/pcspk.h" - -#define PCSPK_BUF_LEN 1792 -#define PCSPK_SAMPLE_RATE 32000 -#define PCSPK_MAX_FREQ (PCSPK_SAMPLE_RATE >> 1) -#define PCSPK_MIN_COUNT ((PIT_FREQ + PCSPK_MAX_FREQ - 1) / PCSPK_MAX_FREQ) - -typedef struct { - ISADevice dev; - MemoryRegion ioport; - uint32_t iobase; - uint8_t sample_buf[PCSPK_BUF_LEN]; - QEMUSoundCard card; - SWVoiceOut *voice; - void *pit; - unsigned int pit_count; - unsigned int samples; - unsigned int play_pos; - int data_on; - int dummy_refresh_clock; -} PCSpkState; - -static const char *s_spk = "pcspk"; -static PCSpkState *pcspk_state; - -static inline void generate_samples(PCSpkState *s) -{ - unsigned int i; - - if (s->pit_count) { - const uint32_t m = PCSPK_SAMPLE_RATE * s->pit_count; - const uint32_t n = ((uint64_t)PIT_FREQ << 32) / m; - - /* multiple of wavelength for gapless looping */ - s->samples = (PCSPK_BUF_LEN * PIT_FREQ / m * m / (PIT_FREQ >> 1) + 1) >> 1; - for (i = 0; i < s->samples; ++i) - s->sample_buf[i] = (64 & (n * i >> 25)) - 32; - } else { - s->samples = PCSPK_BUF_LEN; - for (i = 0; i < PCSPK_BUF_LEN; ++i) - s->sample_buf[i] = 128; /* silence */ - } -} - -static void pcspk_callback(void *opaque, int free) -{ - PCSpkState *s = opaque; - PITChannelInfo ch; - unsigned int n; - - pit_get_channel_info(s->pit, 2, &ch); - - if (ch.mode != 3) { - return; - } - - n = ch.initial_count; - /* avoid frequencies that are not reproducible with sample rate */ - if (n < PCSPK_MIN_COUNT) - n = 0; - - if (s->pit_count != n) { - s->pit_count = n; - s->play_pos = 0; - generate_samples(s); - } - - while (free > 0) { - n = audio_MIN(s->samples - s->play_pos, (unsigned int)free); - n = AUD_write(s->voice, &s->sample_buf[s->play_pos], n); - if (!n) - break; - s->play_pos = (s->play_pos + n) % s->samples; - free -= n; - } -} - -int pcspk_audio_init(ISABus *bus) -{ - PCSpkState *s = pcspk_state; - struct audsettings as = {PCSPK_SAMPLE_RATE, 1, AUD_FMT_U8, 0}; - - AUD_register_card(s_spk, &s->card); - - s->voice = AUD_open_out(&s->card, s->voice, s_spk, s, pcspk_callback, &as); - if (!s->voice) { - AUD_log(s_spk, "Could not open voice\n"); - return -1; - } - - return 0; -} - -static uint64_t pcspk_io_read(void *opaque, hwaddr addr, - unsigned size) -{ - PCSpkState *s = opaque; - PITChannelInfo ch; - - pit_get_channel_info(s->pit, 2, &ch); - - s->dummy_refresh_clock ^= (1 << 4); - - return ch.gate | (s->data_on << 1) | s->dummy_refresh_clock | - (ch.out << 5); -} - -static void pcspk_io_write(void *opaque, hwaddr addr, uint64_t val, - unsigned size) -{ - PCSpkState *s = opaque; - const int gate = val & 1; - - s->data_on = (val >> 1) & 1; - pit_set_gate(s->pit, 2, gate); - if (s->voice) { - if (gate) /* restart */ - s->play_pos = 0; - AUD_set_active_out(s->voice, gate & s->data_on); - } -} - -static const MemoryRegionOps pcspk_io_ops = { - .read = pcspk_io_read, - .write = pcspk_io_write, - .impl = { - .min_access_size = 1, - .max_access_size = 1, - }, -}; - -static int pcspk_initfn(ISADevice *dev) -{ - PCSpkState *s = DO_UPCAST(PCSpkState, dev, dev); - - memory_region_init_io(&s->ioport, &pcspk_io_ops, s, "elcr", 1); - isa_register_ioport(dev, &s->ioport, s->iobase); - - pcspk_state = s; - - return 0; -} - -static Property pcspk_properties[] = { - DEFINE_PROP_HEX32("iobase", PCSpkState, iobase, -1), - DEFINE_PROP_PTR("pit", PCSpkState, pit), - DEFINE_PROP_END_OF_LIST(), -}; - -static void pcspk_class_initfn(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); - - ic->init = pcspk_initfn; - dc->no_user = 1; - dc->props = pcspk_properties; -} - -static const TypeInfo pcspk_info = { - .name = "isa-pcspk", - .parent = TYPE_ISA_DEVICE, - .instance_size = sizeof(PCSpkState), - .class_init = pcspk_class_initfn, -}; - -static void pcspk_register(void) -{ - type_register_static(&pcspk_info); -} -type_init(pcspk_register) |