diff options
| -rw-r--r-- | include/sound/pcm.h | 1 | ||||
| -rw-r--r-- | sound/core/pcm_lib.c | 14 | ||||
| -rw-r--r-- | sound/core/pcm_native.c | 2 |
3 files changed, 12 insertions, 5 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index dd76cde..54c4ccf 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -274,6 +274,7 @@ struct snd_pcm_runtime { snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ + unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ /* -- HW params -- */ diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index e9d98be..d6ecca2 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -329,11 +329,15 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, /* delta = "expected next hw_ptr" for in_interrupt != 0 */ delta = runtime->hw_ptr_interrupt + runtime->period_size; if (delta > new_hw_ptr) { - hw_base += runtime->buffer_size; - if (hw_base >= runtime->boundary) - hw_base = 0; - new_hw_ptr = hw_base + pos; - goto __delta; + /* check for double acknowledged interrupts */ + hdelta = jiffies - runtime->hw_ptr_jiffies; + if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { + hw_base += runtime->buffer_size; + if (hw_base >= runtime->boundary) + hw_base = 0; + new_hw_ptr = hw_base + pos; + goto __delta; + } } } /* new_hw_ptr might be lower than old_hw_ptr in case when */ diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 303ac04..2d2e1b6 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -867,6 +867,8 @@ static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_trigger_tstamp(substream); runtime->hw_ptr_jiffies = jiffies; + runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / + runtime->rate; runtime->status->state = state; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && runtime->silence_size > 0) |
