File 0043-pcm-dmix-dshare-delay-calculation-fixes-and-cleanups.patch of Package alsa

From 0de72e63d7bd180566c71f6fb01d7719525ee326 Mon Sep 17 00:00:00 2001
From: Jaroslav Kysela <perex@perex.cz>
Date: Tue, 19 Jan 2021 11:17:00 +0100
Subject: [PATCH 43/44] pcm: dmix/dshare - delay calculation fixes and cleanups

Unfortunately, we cannot use status->avail from slave, because this value
does not wrap to the buffer size and it may even overflow slave boundary
(endless run). We can use only hw_ptr from slave.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---
 src/pcm/pcm_dmix.c   | 5 ++---
 src/pcm/pcm_dshare.c | 5 ++---
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/pcm/pcm_dmix.c b/src/pcm/pcm_dmix.c
index 5b7472d90c58..be2675aff0f3 100644
--- a/src/pcm/pcm_dmix.c
+++ b/src/pcm/pcm_dmix.c
@@ -488,8 +488,7 @@ static int snd_pcm_dmix_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
 	case SNDRV_PCM_STATE_DRAINING:
 	case SNDRV_PCM_STATE_RUNNING:
 		snd_pcm_dmix_sync_ptr0(pcm, status->hw_ptr);
-		status->delay += snd_pcm_mmap_playback_delay(pcm)
-				+ status->avail - dmix->spcm->buffer_size;
+		status->delay = snd_pcm_mmap_playback_delay(pcm);
 		break;
 	default:
 		break;
@@ -518,7 +517,7 @@ static int snd_pcm_dmix_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
 	case SNDRV_PCM_STATE_PREPARED:
 	case SNDRV_PCM_STATE_SUSPENDED:
 	case STATE_RUN_PENDING:
-		*delayp = snd_pcm_mmap_playback_hw_avail(pcm);
+		*delayp = snd_pcm_mmap_playback_delay(pcm);
 		return 0;
 	case SNDRV_PCM_STATE_XRUN:
 		return -EPIPE;
diff --git a/src/pcm/pcm_dshare.c b/src/pcm/pcm_dshare.c
index 8a6725729bc7..10243013714d 100644
--- a/src/pcm/pcm_dshare.c
+++ b/src/pcm/pcm_dshare.c
@@ -237,8 +237,7 @@ static int snd_pcm_dshare_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
 	case SNDRV_PCM_STATE_DRAINING:
 	case SNDRV_PCM_STATE_RUNNING:
 		snd_pcm_dshare_sync_ptr0(pcm, status->hw_ptr);
-		status->delay += snd_pcm_mmap_playback_delay(pcm)
-				+ status->avail - dshare->spcm->buffer_size;
+		status->delay += snd_pcm_mmap_playback_delay(pcm);
 		break;
 	default:
 		break;
@@ -290,7 +289,7 @@ static int snd_pcm_dshare_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
 	case SNDRV_PCM_STATE_PREPARED:
 	case SNDRV_PCM_STATE_SUSPENDED:
 	case STATE_RUN_PENDING:
-		*delayp = snd_pcm_mmap_playback_hw_avail(pcm);
+		*delayp = snd_pcm_mmap_playback_delay(pcm);
 		return 0;
 	case SNDRV_PCM_STATE_XRUN:
 		return -EPIPE;
-- 
2.26.2