On 2/17/26 06:27, Sergei Heifetz wrote:
PCSPK (PC Speaker) is an embedded audio device. We don't want it to use audio
when QEMU is configured with `--disable-audio`. This is achieved with minimal,
non-invasive changes to the code.
In essence, the changes ensure that PCSPK does not use the corresponding
audio backend, while functioning the same way in non-audio aspects.
Signed-off-by: Sergei Heifetz <[email protected]>
---
hw/audio/pcspk.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/hw/audio/pcspk.c b/hw/audio/pcspk.c
index 916c56fa4c..03fe816024 100644
--- a/hw/audio/pcspk.c
+++ b/hw/audio/pcspk.c
@@ -36,10 +36,12 @@
#include "qom/object.h"
#include "trace.h"
+#ifdef CONFIG_AUDIO
#define PCSPK_BUF_LEN 1792
#define PCSPK_SAMPLE_RATE 32000
#define PCSPK_MAX_FREQ (PCSPK_SAMPLE_RATE >> 1)
#define PCSPK_MIN_COUNT DIV_ROUND_UP(PIT_FREQ, PCSPK_MAX_FREQ)
+#endif
Not needed.
OBJECT_DECLARE_SIMPLE_TYPE(PCSpkState, PC_SPEAKER)
@@ -48,18 +50,25 @@ struct PCSpkState {
MemoryRegion ioport;
uint32_t iobase;
+#ifdef CONFIG_AUDIO
uint8_t sample_buf[PCSPK_BUF_LEN];
+#endif
AudioBackend *audio_be;
+#ifdef CONFIG_AUDIO
SWVoiceOut *voice;
+#endif
PITCommonState *pit;
+#ifdef CONFIG_AUDIO
unsigned int pit_count;
unsigned int samples;
unsigned int play_pos;
+#endif
Please reorder the fields to have a single #ifdef/#endif. Also leave out
DEFINE_AUDIO_PROPERTIES(PCSpkState, audio_be),
which lets you remove audio_be.
Thanks,
Paolo
uint8_t data_on;
uint8_t dummy_refresh_clock;
bool migrate;
};
+#ifdef CONFIG_AUDIO
static const char *s_spk = "pcspk";
static inline void generate_samples(PCSpkState *s)
@@ -131,6 +140,7 @@ static int pcspk_audio_init(PCSpkState *s)
return 0;
}
+#endif
static uint64_t pcspk_io_read(void *opaque, hwaddr addr,
unsigned size)
@@ -161,11 +171,13 @@ static void pcspk_io_write(void *opaque, hwaddr addr,
uint64_t val,
s->data_on = (val >> 1) & 1;
pit_set_gate(s->pit, 2, gate);
+#ifdef CONFIG_AUDIO
if (s->voice) {
if (gate) /* restart */
s->play_pos = 0;
AUD_set_active_out(s->voice, gate & s->data_on);
}
+#endif
}
static const MemoryRegionOps pcspk_io_ops = {
@@ -196,10 +208,12 @@ static void pcspk_realizefn(DeviceState *dev, Error
**errp)
isa_register_ioport(isadev, &s->ioport, s->iobase);
+#ifdef CONFIG_AUDIO
if (s->audio_be && AUD_backend_check(&s->audio_be, errp)) {
pcspk_audio_init(s);
return;
}
+#endif
}
static bool migrate_needed(void *opaque)
