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audio: fix audio timer rate conversion bug
Currently the default audio timer frequency is 10000Hz instead of
a period of 10000us. Also the audiodev timer-period property gets
converted like a frequency. Only handling of the legacy
QEMU_AUDIO_TIMER_PERIOD environment variable is correct because
it's actually a frequency.
With this patch the property timer-period is really a timer period
and QEMU_AUDIO_TIMER_PERIOD remains a frequency.
Fixes: 71830221fb
"-audiodev command line option basic implementation."
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Reviewed-by: Zoltán Kővágó <DirtY.iCE.hu@gmail.com>
Message-id: 90b95e4f-39ef-2b01-da6a-857ebaee1ec5@t-online.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
parent
b396733df3
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@ -1471,7 +1471,7 @@ static int audio_init(Audiodev *dev)
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if (dev->timer_period <= 0) {
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s->period_ticks = 1;
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} else {
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s->period_ticks = NANOSECONDS_PER_SECOND / dev->timer_period;
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s->period_ticks = dev->timer_period * SCALE_US;
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}
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e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
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@ -26,6 +26,7 @@
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#include "audio_int.h"
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#include "qemu-common.h"
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#include "qemu/cutils.h"
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#include "qemu/timer.h"
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#include "qapi/error.h"
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#include "qapi/qapi-visit-audio.h"
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#include "qapi/visitor-impl.h"
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@ -338,8 +339,13 @@ static AudiodevListEntry *legacy_opt(const char *drvname)
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handle_per_direction(audio_get_pdo_in(e->dev), "QEMU_AUDIO_ADC_");
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handle_per_direction(audio_get_pdo_out(e->dev), "QEMU_AUDIO_DAC_");
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/* Original description: Timer period in HZ (0 - use lowest possible) */
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get_int("QEMU_AUDIO_TIMER_PERIOD",
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&e->dev->timer_period, &e->dev->has_timer_period);
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if (e->dev->has_timer_period && e->dev->timer_period) {
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e->dev->timer_period = NANOSECONDS_PER_SECOND / 1000 /
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e->dev->timer_period;
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}
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switch (e->dev->driver) {
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case AUDIODEV_DRIVER_ALSA:
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