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audio: fix size calculation in AUD_get_buffer_size_out()

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The buffer size calculated by AUD_get_buffer_size_out() is often
incorrect. sw->hw->samples * sw->hw->info.bytes_per_frame is the
size of the mixing engine buffer in audio frames multiplied by
the size of one frame of the audio backend. Due to resampling or
format conversion, the size of the frontend buffer can differ
significantly.

Return the correct buffer size when the mixing engine is used.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20250515054429.7385-3-vr_qemu@t-online.de>
(cherry picked from commit ccb4fec0e5)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Volker Rümelin
2025-05-15 07:44:25 +02:00
committed by Michael Tokarev
parent 47ddae806b
commit 6b12cb6edc
1 changed files with 4 additions and 0 deletions
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4
audio/audio.c
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@@ -909,6 +909,10 @@ int AUD_get_buffer_size_out(SWVoiceOut *sw)
return 0;
}
if (audio_get_pdo_out(sw->s->dev)->mixing_engine) {
return sw->resample_buf.size * sw->info.bytes_per_frame;
}
return sw->hw->samples * sw->hw->info.bytes_per_frame;
}