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| author | Volker Rümelin <vr_qemu@t-online.de> | 2022-03-01 20:13:06 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2022-03-04 11:05:13 +0100 |
| commit | 9833438ef624155de879d4ed57ecfcd3464a0bbe (patch) | |
| tree | 2774d4652e970f5ff9fb2d5caa96204882d5765a /audio/sdlaudio.c | |
| parent | 669b95229d13e3c521c2f50bcc9ca0503efb3c5f (diff) | |
| download | qemu-9833438ef624155de879d4ed57ecfcd3464a0bbe.zip qemu-9833438ef624155de879d4ed57ecfcd3464a0bbe.tar.gz qemu-9833438ef624155de879d4ed57ecfcd3464a0bbe.tar.bz2 | |
audio: restore mixing-engine playback buffer size
Commit ff095e5231 "audio: api for mixeng code free backends"
introduced another FIFO for the audio subsystem with exactly the
same size as the mixing-engine FIFO. Most audio backends use
this generic FIFO. The generic FIFO used together with the
mixing-engine FIFO doubles the audio FIFO size, because that's
just two independent FIFOs connected together in series.
For audio playback this nearly doubles the playback latency.
This patch restores the effective mixing-engine playback buffer
size to a pre v4.2.0 size by only accepting the amount of
samples for the mixing-engine queue which the downstream queue
accepts.
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Reviewed-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-Id: <20220301191311.26695-10-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'audio/sdlaudio.c')
| -rw-r--r-- | audio/sdlaudio.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/audio/sdlaudio.c b/audio/sdlaudio.c index d6f3aa1..e605c78 100644 --- a/audio/sdlaudio.c +++ b/audio/sdlaudio.c @@ -309,6 +309,7 @@ static void sdl_callback_in(void *opaque, Uint8 *buf, int len) SDL_UnlockAudioDevice(sdl->devid); \ } +SDL_WRAPPER_FUNC(buffer_get_free, size_t, (HWVoiceOut *hw), (hw), Out) SDL_WRAPPER_FUNC(get_buffer_out, void *, (HWVoiceOut *hw, size_t *size), (hw, size), Out) SDL_WRAPPER_FUNC(put_buffer_out, size_t, @@ -471,6 +472,8 @@ static struct audio_pcm_ops sdl_pcm_ops = { .fini_out = sdl_fini_out, /* wrapper for audio_generic_write */ .write = sdl_write, + /* wrapper for audio_generic_buffer_get_free */ + .buffer_get_free = sdl_buffer_get_free, /* wrapper for audio_generic_get_buffer_out */ .get_buffer_out = sdl_get_buffer_out, /* wrapper for audio_generic_put_buffer_out */ |