From 00d5cfc107dfadf6a3476e5e8679e1067e800cee Mon Sep 17 00:00:00 2001
From: XANTRONIX Development
Date: Sat, 19 Mar 2022 16:23:49 -0400
Subject: Fix buffer size calculation in src/riff.c

---
 src/riff.c | 42 ++++++++++++++++++++++++++----------------
 1 file changed, 26 insertions(+), 16 deletions(-)

diff --git a/src/riff.c b/src/riff.c
index d50ed60..a1bb908 100644
--- a/src/riff.c
+++ b/src/riff.c
@@ -13,7 +13,7 @@ struct _xas_riff {
     int fd;
 
     size_t size,
-           blksize;
+           buffer_size;
 
     xas_audio_format format;
 };
@@ -92,9 +92,9 @@ static xas_riff *new_file(const char *path,
         goto error_fstat;
     }
 
-    riff->file    = path;
-    riff->size    = 0;
-    riff->blksize = st.st_blksize;
+    riff->file        = path;
+    riff->size        = 0;
+    riff->buffer_size = st.st_blksize / format.channels / format.sample_size;
 
     riff->format.channels    = format.channels;
     riff->format.sample_size = format.sample_size;
@@ -210,10 +210,9 @@ static xas_riff *open_fd(int fd) {
         goto error_malloc_riff;
     }
 
-    riff->file    = NULL;
-    riff->fd      = fd;
-    riff->size    = 0;
-    riff->blksize = st.st_blksize;
+    riff->file = NULL;
+    riff->fd   = fd;
+    riff->size = 0;
 
     riff->format.channels    = 0;
     riff->format.sample_size = 0;
@@ -233,6 +232,10 @@ static xas_riff *open_fd(int fd) {
         goto error_wave_header_parse;
     }
 
+    riff->buffer_size = st.st_blksize
+                      / riff->format.channels
+                      / riff->format.sample_size;
+
     return riff;
 
 error_wave_header_parse:
@@ -266,9 +269,12 @@ static xas_riff *open_file(const char *path, int flags) {
         goto error_fstat;
     }
 
-    riff->file    = path;
-    riff->size    = 0;
-    riff->blksize = st.st_blksize;
+    riff->file = path;
+    riff->size = 0;
+
+    riff->buffer_size = st.st_blksize
+                      / riff->format.channels
+                      / riff->format.sample_size;
 
     riff->format.channels    = 0;
     riff->format.sample_size = 0;
@@ -292,6 +298,10 @@ static xas_riff *open_file(const char *path, int flags) {
         goto error_wave_header_parse;
     }
 
+    riff->buffer_size = st.st_blksize
+                      / riff->format.channels
+                      / riff->format.sample_size;
+
     return riff;
 
 error_wave_header_parse:
@@ -372,7 +382,7 @@ xas_audio_stream *xas_riff_new_file(const char *path,
         if ((stream = xas_audio_stream_new_sink((xas_audio_drain)audio_drain,
                                                   (xas_audio_cleanup)close_file,
                                                   format,
-                                                  riff->blksize,
+                                                  riff->buffer_size,
                                                   riff)) == NULL) {
             goto error_audio_stream_new_sink;
         }
@@ -380,7 +390,7 @@ xas_audio_stream *xas_riff_new_file(const char *path,
         if ((stream = xas_audio_stream_new_source((xas_audio_fill)audio_fill,
                                                     (xas_audio_cleanup)close_file,
                                                     format,
-                                                    riff->blksize,
+                                                    riff->buffer_size,
                                                     riff)) == NULL) {
             goto error_audio_stream_new_sink;
         }
@@ -407,7 +417,7 @@ xas_audio_stream *xas_riff_open_file(const char *path, int flags) {
         if ((stream = xas_audio_stream_new_sink((xas_audio_drain)audio_drain,
                                                   (xas_audio_cleanup)close_file,
                                                   riff->format,
-                                                  riff->blksize,
+                                                  riff->buffer_size,
                                                   riff)) == NULL) {
             goto error_audio_stream_new_sink;
         }
@@ -415,7 +425,7 @@ xas_audio_stream *xas_riff_open_file(const char *path, int flags) {
         if ((stream = xas_audio_stream_new_source((xas_audio_fill)audio_fill,
                                                     (xas_audio_cleanup)close_file,
                                                     riff->format,
-                                                    riff->blksize,
+                                                    riff->buffer_size,
                                                     riff)) == NULL) {
             goto error_audio_stream_new_sink;
         }
@@ -441,7 +451,7 @@ xas_audio_stream *xas_riff_open_fd(int fd) {
     if ((stream = xas_audio_stream_new_source((xas_audio_fill)audio_fill,
                                                 (xas_audio_cleanup)close_file,
                                                 riff->format,
-                                                riff->blksize,
+                                                riff->buffer_size,
                                                 riff)) == NULL) {
         goto error_audio_stream_new_sink;
     }
-- 
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