diff options
Diffstat (limited to 'src/modules/alsa/alsa-util.c')
| -rw-r--r-- | src/modules/alsa/alsa-util.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/modules/alsa/alsa-util.c b/src/modules/alsa/alsa-util.c index 274fef45..9be8153b 100644 --- a/src/modules/alsa/alsa-util.c +++ b/src/modules/alsa/alsa-util.c @@ -1586,6 +1586,43 @@ snd_pcm_sframes_t pa_alsa_safe_avail(snd_pcm_t *pcm, size_t hwbuf_size, const pa return n; } +int pa_alsa_safe_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delay, size_t hwbuf_size, const pa_sample_spec *ss) { + ssize_t k; + size_t abs_k; + int r; + + pa_assert(pcm); + pa_assert(delay); + pa_assert(hwbuf_size > 0); + pa_assert(ss); + + /* Some ALSA driver expose weird bugs, let's inform the user about + * what is going on */ + + if ((r = snd_pcm_delay(pcm, delay)) < 0) + return r; + + k = (ssize_t) *delay * (ssize_t) pa_frame_size(ss); + + abs_k = k >= 0 ? (size_t) k : (size_t) -k; + + if (abs_k >= hwbuf_size * 3 || + abs_k >= pa_bytes_per_second(ss)*10) + + PA_ONCE_BEGIN { + char *dn = pa_alsa_get_driver_name_by_pcm(pcm); + pa_log(_("snd_pcm_delay() returned a value that is exceptionally large: %li bytes (%s%lu ms).\n" + "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers."), + (signed long) k, + k < 0 ? "-" : "", + (unsigned long) (pa_bytes_to_usec(abs_k, ss) / PA_USEC_PER_MSEC), + pa_strnull(dn)); + pa_xfree(dn); + } PA_ONCE_END; + + return 0; +} + int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames, size_t hwbuf_size, const pa_sample_spec *ss) { int r; snd_pcm_uframes_t before; |