From: Jaroslav Kysela perex@perex.cz
The code tracking the added samples in thresholded mode and the code tracking the just played samples in top-up mode are semantically identical, so factor it out to a common function to enhance readability.
Signed-off-by: Jaroslav Kysela perex@perex.cz Signed-off-by: Oswald Buddenhagen oswald.buddenhagen@gmx.de --- v2: - nicer function name and variable name - improved language of commit message --- sound/core/pcm_lib.c | 42 ++++++++++++++++++++++-------------------- 1 file changed, 22 insertions(+), 20 deletions(-)
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index a1838130c830..670572c9a8cc 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -33,6 +33,25 @@ static int fill_silence_frames(struct snd_pcm_substream *substream, snd_pcm_uframes_t off, snd_pcm_uframes_t frames);
+ +static inline void update_silence_vars(struct snd_pcm_runtime *runtime, + snd_pcm_uframes_t ptr, + snd_pcm_uframes_t new_ptr) +{ + snd_pcm_sframes_t delta; + + delta = new_ptr - ptr; + if (delta == 0) + return; + if (delta < 0) + delta += runtime->boundary; + if ((snd_pcm_uframes_t)delta < runtime->silence_filled) + runtime->silence_filled -= delta; + else + runtime->silence_filled = 0; + runtime->silence_start = new_ptr; +} + /* * fill ring buffer with silence * runtime->silence_start: starting pointer to silence area @@ -49,18 +68,9 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram int err;
if (runtime->silence_size < runtime->boundary) { - snd_pcm_sframes_t noise_dist, n; + snd_pcm_sframes_t noise_dist; snd_pcm_uframes_t appl_ptr = READ_ONCE(runtime->control->appl_ptr); - if (runtime->silence_start != appl_ptr) { - n = appl_ptr - runtime->silence_start; - if (n < 0) - n += runtime->boundary; - if ((snd_pcm_uframes_t)n < runtime->silence_filled) - runtime->silence_filled -= n; - else - runtime->silence_filled = 0; - runtime->silence_start = appl_ptr; - } + update_silence_vars(runtime, runtime->silence_start, appl_ptr); /* initialization outside pointer updates */ if (new_hw_ptr == ULONG_MAX) new_hw_ptr = runtime->status->hw_ptr; @@ -87,15 +97,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram runtime->silence_filled = avail > 0 ? avail : 0; runtime->silence_start = runtime->status->hw_ptr; } else { - ofs = runtime->status->hw_ptr; - frames = new_hw_ptr - ofs; - if ((snd_pcm_sframes_t)frames < 0) - frames += runtime->boundary; - runtime->silence_filled -= frames; - if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { - runtime->silence_filled = 0; - } - runtime->silence_start = new_hw_ptr; + update_silence_vars(runtime, runtime->status->hw_ptr, new_hw_ptr); } frames = runtime->buffer_size - runtime->silence_filled; }