From: Jaroslav Kysela <perex@perex.cz>
Date: Fri, 18 Feb 2000 18:12:50 +0000 (+0000)
Subject: Loopback API improvement - added silence block.
X-Git-Tag: v1.0.3~1320
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=b3160628560add422f5c00acc2f1d97f7cc5f175;p=alsa-lib.git

Loopback API improvement - added silence block.
---

diff --git a/include/pcm.h b/include/pcm.h
index 2797e364..39854535 100644
--- a/include/pcm.h
+++ b/include/pcm.h
@@ -167,7 +167,8 @@ typedef struct snd_pcm_loopback_callbacks {
 	void (*data) (void *private_data, char *buffer, size_t count);
 	void (*position_change) (void *private_data, unsigned int pos);
 	void (*format_change) (void *private_data, snd_pcm_format_t *format);
-	char *reserved[32];		/* reserved for the future use - must be NULL!!! */
+	void (*silence) (void *private_data, size_t count);
+	void *reserved[31];		/* reserved for the future use - must be NULL!!! */
 } snd_pcm_loopback_callbacks_t;
 
 int snd_pcm_loopback_open(snd_pcm_loopback_t **handle, int card, int device, int subdev, int mode);
diff --git a/src/pcm/pcm_loopback.c b/src/pcm/pcm_loopback.c
index 74b86ae8..9b07c69b 100644
--- a/src/pcm/pcm_loopback.c
+++ b/src/pcm/pcm_loopback.c
@@ -229,6 +229,10 @@ ssize_t snd_pcm_loopback_read(snd_pcm_loopback_t *lb, snd_pcm_loopback_callbacks
 					callbacks->position_change(callbacks->private_data, pos);
 			}
 			break;
+		case SND_PCM_LB_TYPE_SILENCE:
+			if (callbacks->silence)
+				callbacks->silence(callbacks->private_data, header.size);
+			break;
 		}
 	}
 	return result;