diff options
| author | Volker Rümelin <vr_qemu@t-online.de> | 2023-02-24 20:05:52 +0100 |
|---|---|---|
| committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2023-03-06 10:30:23 +0400 |
| commit | a9ea567873ba8d532520f194413ff28f37065c00 (patch) | |
| tree | c25cdae272de3f9ffbd94439cc7255496cd9c50f /audio/mixeng.h | |
| parent | fbde1edf06dad792ef3e9f51e3f52a49669bdd40 (diff) | |
audio: make recording packet length calculation exact
Introduce the new function st_rate_frames_out() to calculate the
exact number of audio output frames the resampling code can
generate from a given number of audio input frames. When upsampling,
this function returns the maximum number of output frames.
This new function replaces the audio_frontend_frames_in()
function, which calculated the average number of output frames
rounded down to the nearest integer. The audio_frontend_frames_in()
function was additionally used to limit the number of output frames
to the resample buffer size. In audio_pcm_sw_read() the variable
resample_buf.size replaces the open coded audio_frontend_frames_in()
function. In audio_run_in() an additional MIN() function is
necessary.
After this patch the audio packet length calculation for audio
recording is exact.
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20230224190555.7409-12-vr_qemu@t-online.de>
Diffstat (limited to 'audio/mixeng.h')
| -rw-r--r-- | audio/mixeng.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/audio/mixeng.h b/audio/mixeng.h index 64c1e231cc..f9de7cffeb 100644 --- a/audio/mixeng.h +++ b/audio/mixeng.h @@ -52,6 +52,7 @@ void st_rate_flow(void *opaque, st_sample *ibuf, st_sample *obuf, void st_rate_flow_mix(void *opaque, st_sample *ibuf, st_sample *obuf, size_t *isamp, size_t *osamp); void st_rate_stop (void *opaque); +uint32_t st_rate_frames_out(void *opaque, uint32_t frames_in); uint32_t st_rate_frames_in(void *opaque, uint32_t frames_out); void mixeng_clear (struct st_sample *buf, int len); void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol); |