From: Jaroslav Kysela <perex@perex.cz>
Date: Wed, 21 Jan 2026 10:58:43 +0000 (+0100)
Subject: lib: introduce compress_get_hpointer64
X-Git-Tag: v1.2.16~23
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=724b1fc9893c2afccad19d197220552e05125b72;p=tinycompress.git

lib: introduce compress_get_hpointer64

Allow to pass unwrapped avail value to applications. Introduce
new compress_get_hpointer64() function and change callback
in ops.

Use UINT_MAX limiting rather than blind wrap like in the previous
code in compress_get_hpointer().

Closes: https://github.com/alsa-project/tinycompress/pull/31
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/include/tinycompress/compress_ops.h b/include/tinycompress/compress_ops.h
index 7eabeb3..7a4ffc9 100644
--- a/include/tinycompress/compress_ops.h
+++ b/include/tinycompress/compress_ops.h
@@ -23,7 +23,7 @@ struct compress_ops {
 			unsigned int flags, struct compr_config *config);
 	void (*close)(void *compress_data);
 	int (*get_hpointer)(void *compress_data,
-			unsigned int *avail, struct timespec *tstamp);
+			unsigned long long *avail, struct timespec *tstamp);
 	int (*get_tstamp)(void *compress_data,
 			unsigned long long *samples, unsigned int *sampling_rate);
 	int (*write)(void *compress_data, const void *buf, size_t size);
diff --git a/include/tinycompress/tinycompress.h b/include/tinycompress/tinycompress.h
index 8d9677b..f954f25 100644
--- a/include/tinycompress/tinycompress.h
+++ b/include/tinycompress/tinycompress.h
@@ -139,6 +139,18 @@ int compress_get_hpointer(struct compress *compress,
 		unsigned int *avail, struct timespec *tstamp);
 
 
+/*
+ * compress_get_hpointe64r: get the hw timestamp
+ * return 0 on success, negative on error
+ *
+ * @compress: compress stream on which query is made
+ * @avail: buffer availble for write/read, in bytes
+ * @tstamp: hw time
+ */
+int compress_get_hpointer64(struct compress *compress,
+		unsigned long long *avail, struct timespec *tstamp);
+
+
 /*
  * compress_get_tstamp: get the raw hw timestamp
  * return 0 on success, negative on error
diff --git a/src/lib/compress.c b/src/lib/compress.c
index 0c537ac..d9ec77a 100644
--- a/src/lib/compress.c
+++ b/src/lib/compress.c
@@ -58,6 +58,7 @@
 #include <dlfcn.h>
 #include <stdio.h>
 #include <string.h>
+#include <limits.h>
 #include <sys/errno.h>
 #include <sys/time.h>
 #include "tinycompress/tinycompress.h"
@@ -202,6 +203,21 @@ void compress_close(struct compress *compress)
 
 int compress_get_hpointer(struct compress *compress,
 		unsigned int *avail, struct timespec *tstamp)
+{
+	unsigned long long _avail;
+	int ret;
+
+	ret = compress->ops->get_hpointer(compress->data, &_avail, tstamp);
+	if (ret >= 0) {
+		if (_avail > UINT_MAX)
+			_avail = UINT_MAX;
+		*avail = (unsigned int)_avail;
+	}
+	return ret;
+}
+
+int compress_get_hpointer64(struct compress *compress,
+		unsigned long long *avail, struct timespec *tstamp)
 {
 	return compress->ops->get_hpointer(compress->data, avail, tstamp);
 }
diff --git a/src/lib/compress_hw.c b/src/lib/compress_hw.c
index 6e372c5..1519d71 100644
--- a/src/lib/compress_hw.c
+++ b/src/lib/compress_hw.c
@@ -237,7 +237,7 @@ static void compress_hw_avail64_from_32(struct snd_compr_avail64 *avail64,
 }
 
 static int compress_hw_get_hpointer(void *data,
-		unsigned int *avail, struct timespec *tstamp)
+		unsigned long long *avail, struct timespec *tstamp)
 {
 	struct compress_hw_data *compress = (struct compress_hw_data *)data;
 	struct snd_compr_avail kavail32;
@@ -263,7 +263,7 @@ static int compress_hw_get_hpointer(void *data,
 
 	if (0 == kavail64.tstamp.sampling_rate)
 		return oops(compress, ENODATA, "sample rate unknown");
-	*avail = (unsigned int)kavail64.avail;
+	*avail = kavail64.avail;
 	time = kavail64.tstamp.pcm_io_frames / kavail64.tstamp.sampling_rate;
 	tstamp->tv_sec = time;
 	time = kavail64.tstamp.pcm_io_frames % kavail64.tstamp.sampling_rate;