main/multimedia/videoplayer/vlc/files/vlc-2.2.4-alsa-large-buffers.patch

X-Git-Url: https://git.videolan.org/?p=vlc.git;a=blobdiff_plain;f=modules%2Faudio_output%2Falsa.c;h=4e9fd53592d048baa8b57f30df15ab5806139d07;hp=2d1f99e9cb743bca12c6bdf32cc84a92d07fda8b;hb=47f74a83c161173b0d15e95dab8ceb7c97de51b4;hpb=6ae2905ef7fbc7de3a3a4a1bdf8ad6df46ce570a

diff --git a/modules/audio_output/alsa.c b/modules/audio_output/alsa.c
index 2d1f99e..4e9fd53 100644
--- a/modules/audio_output/alsa.c
+++ b/modules/audio_output/alsa.c
@@ -495,6 +495,15 @@ static int Start (audio_output_t *aout, audio_sample_format_t *restrict fmt)
     }
     sys->rate = fmt->i_rate;
 
+#if 1 /* work-around for period-long latency outputs (e.g. PulseAudio): */
+    param = AOUT_MIN_PREPARE_TIME;
+    val = snd_pcm_hw_params_set_period_time_near (pcm, hw, &param, NULL);
+    if (val)
+    {
+        msg_Err (aout, "cannot set period: %s", snd_strerror (val));
+        goto error;
+    }
+#endif
     /* Set buffer size */
     param = AOUT_MAX_ADVANCE_TIME;
     val = snd_pcm_hw_params_set_buffer_time_near (pcm, hw, &param, NULL);
@@ -503,14 +512,22 @@ static int Start (audio_output_t *aout, audio_sample_format_t *restrict fmt)
         msg_Err (aout, "cannot set buffer duration: %s", snd_strerror (val));
         goto error;
     }
-
-    param = AOUT_MIN_PREPARE_TIME;
+#if 0
+    val = snd_pcm_hw_params_get_buffer_time (hw, &param, NULL);
+    if (val)
+    {
+        msg_Warn (aout, "cannot get buffer time: %s", snd_strerror(val));
+        param = AOUT_MIN_PREPARE_TIME;
+    }
+    else
+        param /= 2;
     val = snd_pcm_hw_params_set_period_time_near (pcm, hw, &param, NULL);
     if (val)
     {
         msg_Err (aout, "cannot set period: %s", snd_strerror (val));
         goto error;
     }
+#endif
 
     /* Commit hardware parameters */
     val = snd_pcm_hw_params (pcm, hw);