Fixes null reference bug introduced by audio hook changes that affects various OS...

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@310547 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/audiohook.c b/main/audiohook.c
index bb510e3..a1d658c 100644 (file)
--- a/main/audiohook.c
+++ b/main/audiohook.c
@@ -311,25 +311,26 @@ static struct ast_frame *audiohook_read_frame_both(struct ast_audiohook *audioho
        ast_debug(1, "Failed to get %d samples from write factory %p\n", (int)samples, &audiohook->write_factory);
 
        /* Basically we figure out which buffer to use... and if mixing can be done here */
-       if (!read_buf && !write_buf)
-               return NULL;
-
-       if (read_buf) {
-               final_buf = buf1;
-               frame.data.ptr = final_buf;
+       if (read_buf && read_reference) {
+               frame.data.ptr = buf1;
                *read_reference = ast_frdup(&frame);
        }
-
-       if (write_buf) {
-               final_buf = buf2;
-               frame.data.ptr = final_buf;
+       if (write_buf && write_reference) {
+               frame.data.ptr = buf2;
                *write_reference = ast_frdup(&frame);
        }
 
        if (read_buf && write_buf) {
-               for (i = 0, data1 = read_buf, data2 = write_buf; i < samples; i++, data1++, data2++)
+               for (i = 0, data1 = read_buf, data2 = write_buf; i < samples; i++, data1++, data2++) {
                        ast_slinear_saturated_add(data1, data2);
+               }
+               final_buf = buf1;
+       } else if (read_buf) {
                final_buf = buf1;
+       } else if (write_buf) {
+               final_buf = buf2;
+       } else {
+               return NULL;
        }
 
        /* Make the final buffer part of the frame, so it gets duplicated fine */