summaryrefslogtreecommitdiffstats
path: root/src/modules/alsa-util.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/modules/alsa-util.c')
-rw-r--r--src/modules/alsa-util.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/src/modules/alsa-util.c b/src/modules/alsa-util.c
index ffe7795e..39cea494 100644
--- a/src/modules/alsa-util.c
+++ b/src/modules/alsa-util.c
@@ -30,6 +30,7 @@
#include <pulse/sample.h>
#include <pulse/xmalloc.h>
+#include <pulse/timeval.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
@@ -1109,3 +1110,62 @@ pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll) {
return item;
}
+
+snd_pcm_sframes_t pa_alsa_safe_avail_update(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss) {
+ snd_pcm_sframes_t n;
+ size_t k;
+
+ pa_assert(pcm);
+ pa_assert(hwbuf_size > 0);
+ pa_assert(ss);
+
+ /* Some ALSA driver expose weird bugs, let's inform the user about
+ * what is going on */
+
+ n = snd_pcm_avail_update(pcm);
+
+ if (n <= 0)
+ return n;
+
+ k = (size_t) n * pa_frame_size(ss);
+
+ if (k >= hwbuf_size * 3 ||
+ k >= pa_bytes_per_second(ss)*10)
+ pa_log("snd_pcm_avail_update() returned a value that is exceptionally large: %lu bytes (%lu ms) "
+ "Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio developers.",
+ (unsigned long) k, (unsigned long) pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC);
+
+ return n;
+}
+
+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;
+ size_t k;
+
+ pa_assert(pcm);
+ pa_assert(areas);
+ pa_assert(offset);
+ pa_assert(frames);
+ pa_assert(hwbuf_size > 0);
+ pa_assert(ss);
+
+ before = *frames;
+
+ r = snd_pcm_mmap_begin(pcm, areas, offset, frames);
+
+ if (r < 0)
+ return r;
+
+ k = (size_t) *frames * pa_frame_size(ss);
+
+ if (*frames > before ||
+ k >= hwbuf_size * 3 ||
+ k >= pa_bytes_per_second(ss)*10)
+
+ pa_log("snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu bytes (%lu ms) "
+ "Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio developers.",
+ (unsigned long) k, (unsigned long) pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC);
+
+ return r;
+}