Test if the audio subsystem can handle extreme up- and down-
sampling ratios like 44100/1 and 1/44100. For some time these
used to trigger QEMU aborts. The test was taken from
https://gitlab.com/qemu-project/qemu/-/issues/71 where it was
used to demonstrate a very different issue.
Suggested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Thanks for working on this
It seems to show something different though:
"
A bug was just triggered in audio_calloc
Save all your work and restart without audio
I am sorry
"
AUD_open_out() is called with audsettings: {freq = 1, nchannels = 2, fmt = AUDIO_FORMAT_S16, endianness = 0}
And that's it. Any idea?
---
tests/qtest/ac97-test.c | 40 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 39 insertions(+), 1 deletion(-)
diff --git a/tests/qtest/ac97-test.c b/tests/qtest/ac97-test.c
index 74103efdfa..ce25f1d588 100644
--- a/tests/qtest/ac97-test.c
+++ b/tests/qtest/ac97-test.c
@@ -42,16 +42,54 @@ static void *ac97_create(void *pci_bus, QGuestAllocator *alloc, void *addr)
return &ac97->obj;
}
+/*
+ * This is rather a test of the audio subsystem and not an AC97 test. Test if
+ * the audio subsystem can handle a 44100/1 upsample ratio. With an audio
+ * mixing buffer size of 1024 audio frames, the audio subsystem should either
+ * generate 1024 output frames from 0.0232 input frames or silently give up.
+ */
+static void ac97_playback_upsample(void *obj, void *data, QGuestAllocator *alloc)
+{
+ QAC97 *ac97 = obj;
+ QPCIDevice *dev = &ac97->dev;
+ QPCIBar bar0;
+
+ qpci_device_enable(dev);
+ bar0 = qpci_iomap(dev, 0, NULL);
+ qpci_io_writew(dev, bar0, 0x2c, 0x1);
+}
+
+/*
+ * This test is similar to the playback upsample test. This time the audio
+ * subsystem should either generate 0.0232 audio frames from 1024 input frames
+ * or silently give up.
+ */
+static void ac97_record_downsample(void *obj, void *data, QGuestAllocator *alloc)
+{
+ QAC97 *ac97 = obj;
+ QPCIDevice *dev = &ac97->dev;
+ QPCIBar bar0;
+
+ qpci_device_enable(dev);
+ bar0 = qpci_iomap(dev, 0, NULL);
+ qpci_io_writew(dev, bar0, 0x32, 0x1);
+}
+
static void ac97_register_nodes(void)
{
QOSGraphEdgeOptions opts = {
- .extra_device_opts = "addr=04.0",
+ .extra_device_opts = "addr=04.0,audiodev=snd0",
+ .after_cmd_line = "-audiodev none,id=snd0"
+ ",out.frequency=44100,in.frequency=44100",
};
add_qpci_address(&opts, &(QPCIAddress) { .devfn = QPCI_DEVFN(4, 0) });
qos_node_create_driver("AC97", ac97_create);
qos_node_produces("AC97", "pci-device");
qos_node_consumes("AC97", "pci-bus", &opts);
+
+ qos_add_test("playback_upsample", "AC97", ac97_playback_upsample, NULL);
+ qos_add_test("record_downsample", "AC97", ac97_record_downsample, NULL);
}
libqos_init(ac97_register_nodes);
--
2.35.3