mirror of
https://github.com/qemu/qemu.git
synced 2024-11-28 14:24:02 +08:00
bea29e9f2e
The pulseaudio backend currently converts, clips and copies audio playback samples in the mixing-engine sample buffer multiple times. In qpa_get_buffer_out() the function pa_stream_begin_write() returns a rather large buffer and this allows audio_pcm_hw_run_out() in audio/audio.c to copy all samples in the mixing-engine buffer to the pulse audio buffer. Immediately after copying, qpa_write() notices with a call to pa_stream_writable_size() that pulse audio only needs a smaller part of the copied samples and ignores the rest. This copy and ignore process happens several times for each audio sample. To fix this behaviour, call pa_stream_writable_size() in qpa_get_buffer_out() to limit the number of samples audio_pcm_hw_run_out() will convert. With this change the pulseaudio pcm_ops functions put_buffer_out and write are no longer identical and a separate qpa_put_buffer_out is needed. Signed-off-by: Volker Rümelin <vr_qemu@t-online.de> Message-id: 9315afe5-5958-c0b4-ea1e-14769511a9d5@t-online.de Message-Id: <20210110100239.27588-13-vr_qemu@t-online.de> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> |
||
|---|---|---|
| .. | ||
| alsaaudio.c | ||
| audio_int.h | ||
| audio_legacy.c | ||
| audio_template.h | ||
| audio_win_int.c | ||
| audio_win_int.h | ||
| audio.c | ||
| audio.h | ||
| coreaudio.c | ||
| dsound_template.h | ||
| dsoundaudio.c | ||
| jackaudio.c | ||
| meson.build | ||
| mixeng_template.h | ||
| mixeng.c | ||
| mixeng.h | ||
| noaudio.c | ||
| ossaudio.c | ||
| paaudio.c | ||
| rate_template.h | ||
| sdlaudio.c | ||
| spiceaudio.c | ||
| trace-events | ||
| trace.h | ||
| wavaudio.c | ||
| wavcapture.c | ||