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authorbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2006-04-24 21:58:30 +0000
committerbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2006-04-24 21:58:30 +0000
commitfd06c37550b43980e8d641bb109c219cbe001d13 (patch)
tree785a969324a3bcd45cce511775a15891e3cc673d
parent52328140e2892c0f7033f6857f1a96da1680bf79 (diff)
PC speaker emulation (Joachim Henke)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1851 c046a42c-6fe2-441c-8c8c-71466251a162
-rw-r--r--Changelog1
-rw-r--r--Makefile.target2
-rw-r--r--hw/i8254.c12
-rw-r--r--hw/pc.c20
-rw-r--r--hw/pcspk.c147
-rw-r--r--vl.c9
-rw-r--r--vl.h6
7 files changed, 177 insertions, 20 deletions
diff --git a/Changelog b/Changelog
index d07a7ebb71..871d8fcd67 100644
--- a/Changelog
+++ b/Changelog
@@ -2,6 +2,7 @@ version 0.8.1:
- USB tablet support (Brad Campbell, Anthony Liguori)
- win32 host serial support (Kazu)
+ - PC speaker support (Joachim Henke)
version 0.8.0:
diff --git a/Makefile.target b/Makefile.target
index be2fcfe4a4..bbb755d2d6 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -310,7 +310,7 @@ VL_OBJS+= ne2000.o rtl8139.o
ifeq ($(TARGET_BASE_ARCH), i386)
# Hardware support
VL_OBJS+= ide.o pckbd.o ps2.o vga.o $(SOUND_HW) dma.o $(AUDIODRV)
-VL_OBJS+= fdc.o mc146818rtc.o serial.o i8259.o i8254.o pc.o
+VL_OBJS+= fdc.o mc146818rtc.o serial.o i8259.o i8254.o pcspk.o pc.o
VL_OBJS+= cirrus_vga.o mixeng.o apic.o parallel.o
DEFINES += -DHAS_AUDIO
endif
diff --git a/hw/i8254.c b/hw/i8254.c
index 6f05168274..a4097632eb 100644
--- a/hw/i8254.c
+++ b/hw/i8254.c
@@ -209,6 +209,18 @@ int pit_get_gate(PITState *pit, int channel)
return s->gate;
}
+int pit_get_initial_count(PITState *pit, int channel)
+{
+ PITChannelState *s = &pit->channels[channel];
+ return s->count;
+}
+
+int pit_get_mode(PITState *pit, int channel)
+{
+ PITChannelState *s = &pit->channels[channel];
+ return s->mode;
+}
+
static inline void pit_load_count(PITChannelState *s, int val)
{
if (val == 0)
diff --git a/hw/pc.c b/hw/pc.c
index fb8f87032a..38c75d471c 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -36,8 +36,6 @@
#define KERNEL_PARAMS_ADDR 0x00090000
#define KERNEL_CMDLINE_ADDR 0x00099000
-int speaker_data_on;
-int dummy_refresh_clock;
static fdctrl_t *floppy_controller;
static RTCState *rtc_state;
static PITState *pit;
@@ -273,21 +271,6 @@ static void cmos_init(int ram_size, int boot_device, BlockDriverState **hd_table
// rtc_set_memory(s, 0x38, 1);
}
-static void speaker_ioport_write(void *opaque, uint32_t addr, uint32_t val)
-{
- speaker_data_on = (val >> 1) & 1;
- pit_set_gate(pit, 2, val & 1);
-}
-
-static uint32_t speaker_ioport_read(void *opaque, uint32_t addr)
-{
- int out;
- out = pit_get_out(pit, 2, qemu_get_clock(vm_clock));
- dummy_refresh_clock ^= 1;
- return (speaker_data_on << 1) | pit_get_gate(pit, 2) | (out << 5) |
- (dummy_refresh_clock << 4);
-}
-
void ioport_set_a20(int enable)
{
/* XXX: send to all CPUs ? */
@@ -783,8 +766,6 @@ static void pc_init1(int ram_size, int vga_ram_size, int boot_device,
}
rtc_state = rtc_init(0x70, 8);
- register_ioport_read(0x61, 1, 1, speaker_ioport_read, NULL);
- register_ioport_write(0x61, 1, 1, speaker_ioport_write, NULL);
register_ioport_read(0x92, 1, 1, ioport92_read, NULL);
register_ioport_write(0x92, 1, 1, ioport92_write, NULL);
@@ -794,6 +775,7 @@ static void pc_init1(int ram_size, int vga_ram_size, int boot_device,
}
isa_pic = pic_init(pic_irq_request, first_cpu);
pit = pit_init(0x40, 0);
+ pcspk_init(pit);
if (pci_enabled) {
pic_set_alt_irq_func(isa_pic, ioapic_set_irq, ioapic);
}
diff --git a/hw/pcspk.c b/hw/pcspk.c
new file mode 100644
index 0000000000..2e30662a25
--- /dev/null
+++ b/hw/pcspk.c
@@ -0,0 +1,147 @@
+/*
+ * 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 "vl.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 {
+ uint8_t sample_buf[PCSPK_BUF_LEN];
+ QEMUSoundCard card;
+ SWVoiceOut *voice;
+ PITState *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;
+ unsigned int n;
+
+ if (pit_get_mode(s->pit, 2) != 3)
+ return;
+
+ n = pit_get_initial_count(s->pit, 2);
+ /* 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(AudioState *audio)
+{
+ PCSpkState *s = &pcspk_state;
+ audsettings_t as = {PCSPK_SAMPLE_RATE, 1, AUD_FMT_U8};
+
+ if (!audio) {
+ AUD_log(s_spk, "No audio state\n");
+ return -1;
+ }
+ AUD_register_card(audio, s_spk, &s->card);
+
+ s->voice = AUD_open_out(&s->card, s->voice, s_spk, s, pcspk_callback, &as, 0);
+ if (!s->voice) {
+ AUD_log(s_spk, "Could not open voice\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static uint32_t pcspk_ioport_read(void *opaque, uint32_t addr)
+{
+ PCSpkState *s = opaque;
+ int out;
+
+ s->dummy_refresh_clock ^= (1 << 4);
+ out = pit_get_out(s->pit, 2, qemu_get_clock(vm_clock)) << 5;
+
+ return pit_get_gate(s->pit, 2) | (s->data_on << 1) | s->dummy_refresh_clock | out;
+}
+
+static void pcspk_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ 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);
+ }
+}
+
+void pcspk_init(PITState *pit)
+{
+ PCSpkState *s = &pcspk_state;
+
+ s->pit = pit;
+ register_ioport_read(0x61, 1, 1, pcspk_ioport_read, s);
+ register_ioport_write(0x61, 1, 1, pcspk_ioport_write, s);
+}
diff --git a/vl.c b/vl.c
index 36b7e24fe3..3b83ed2f2d 100644
--- a/vl.c
+++ b/vl.c
@@ -4862,6 +4862,15 @@ void register_machines(void)
#ifdef HAS_AUDIO
struct soundhw soundhw[] = {
+#ifdef TARGET_I386
+ {
+ "pcspk",
+ "PC speaker",
+ 0,
+ 1,
+ { .init_isa = pcspk_audio_init }
+ },
+#endif
{
"sb16",
"Creative Sound Blaster 16",
diff --git a/vl.h b/vl.h
index 72381ec8f6..964ca8a8fe 100644
--- a/vl.h
+++ b/vl.h
@@ -819,8 +819,14 @@ typedef struct PITState PITState;
PITState *pit_init(int base, int irq);
void pit_set_gate(PITState *pit, int channel, int val);
int pit_get_gate(PITState *pit, int channel);
+int pit_get_initial_count(PITState *pit, int channel);
+int pit_get_mode(PITState *pit, int channel);
int pit_get_out(PITState *pit, int channel, int64_t current_time);
+/* pcspk.c */
+void pcspk_init(PITState *);
+int pcspk_audio_init(AudioState *);
+
/* pc.c */
extern QEMUMachine pc_machine;
extern QEMUMachine isapc_machine;