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| author | Jaroslav Kysela <perex@perex.cz> | 2023-05-05 17:52:40 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-05-05 18:23:50 +0200 |
| commit | 781b4da64b9e3dafb356b7365e7ecf273e879602 (patch) | |
| tree | 35bdcb22f19bc084e65c5c522a049c7051efbb29 /sound | |
| parent | 2fbaa44a59887f9fd70c986f39c4ac9aebd0c8a1 (diff) | |
| download | linux-rpi-781b4da64b9e3dafb356b7365e7ecf273e879602.tar.gz linux-rpi-781b4da64b9e3dafb356b7365e7ecf273e879602.tar.bz2 linux-rpi-781b4da64b9e3dafb356b7365e7ecf273e879602.zip | |
ALSA: pcm: fix playback silence - correct incremental silencing
Commit 9a826ddba6e ("[ALSA] pcm core: fix silence_start calculations")
came with exactly the right commit message, but the patch just made
things broken in a different way: We'd fill at a too low address if the
area was already partially zeroed, so we'd under-fill. This affected
both thresholded mode (where it was somewhat less likely) and top-up
mode (where it would be the case consistently).
Co-developed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20230505155244.2312199-3-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/core/pcm_lib.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 6ad67e7e740c..5ddb74a12030 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -87,9 +87,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram if (avail > runtime->buffer_size) avail = runtime->buffer_size; runtime->silence_filled = avail > 0 ? avail : 0; - runtime->silence_start = (runtime->status->hw_ptr + - runtime->silence_filled) % - runtime->boundary; + runtime->silence_start = runtime->status->hw_ptr; } else { ofs = runtime->status->hw_ptr; frames = new_hw_ptr - ofs; @@ -98,10 +96,8 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram runtime->silence_filled -= frames; if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { runtime->silence_filled = 0; - runtime->silence_start = new_hw_ptr; - } else { - runtime->silence_start = ofs; } + runtime->silence_start = new_hw_ptr; } frames = runtime->buffer_size - runtime->silence_filled; } @@ -109,7 +105,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram return; if (frames == 0) return; - ofs = runtime->silence_start % runtime->buffer_size; + ofs = (runtime->silence_start + runtime->silence_filled) % runtime->buffer_size; while (frames > 0) { transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; err = fill_silence_frames(substream, ofs, transfer); |