diff options
| author | Volker Rümelin <vr_qemu@t-online.de> | 2023-02-24 20:05:53 +0100 |
|---|---|---|
| committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2023-03-06 10:30:23 +0400 |
| commit | e1e6a6fcc9921a76a32109af515146f85ccc5f84 (patch) | |
| tree | 79759fb46a8a02377e75f4ef520854f79e278091 /audio/audio_template.h | |
| parent | a9ea567873ba8d532520f194413ff28f37065c00 (diff) | |
audio: handle leftover audio frame from upsampling
Upsampling may leave one remaining audio frame in the input
buffer. The emulated audio playback devices are currently
resposible to write this audio frame again in the next write
cycle. Push that task down to audio_pcm_sw_write.
This is another step towards an audio callback interface that
guarantees that when audio frontends are told they can write
n audio frames, they can actually do so.
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20230224190555.7409-13-vr_qemu@t-online.de>
Diffstat (limited to 'audio/audio_template.h')
| -rw-r--r-- | audio/audio_template.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/audio/audio_template.h b/audio/audio_template.h index a0b653f52c..0d8aab6fad 100644 --- a/audio/audio_template.h +++ b/audio/audio_template.h @@ -138,6 +138,12 @@ static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw) return -1; } + /* + * Allocate one additional audio frame that is needed for upsampling + * if the resample buffer size is small. For large buffer sizes take + * care of overflows. + */ + samples = samples < INT_MAX ? samples + 1 : INT_MAX; sw->resample_buf.buffer = g_new0(st_sample, samples); sw->resample_buf.size = samples; sw->resample_buf.pos = 0; |