pcm_buffer: add assertions

src/pcm_buffer.c

@@ -32,6 +32,8 @@ align_8k(size_t size)
 void *
 pcm_buffer_get(struct pcm_buffer *buffer, size_t size)
 {
+	assert(buffer != NULL);
+
 	if (buffer->size < size) {
 		/* free the old buffer */
 		g_free(buffer->buffer);
@@ -40,5 +42,7 @@ pcm_buffer_get(struct pcm_buffer *buffer, size_t size)
 		buffer->buffer = g_malloc(buffer->size);
 	}
 
+	assert(buffer->size >= size);
+
 	return buffer->buffer;
 }

src/pcm_buffer.h

@@ -22,6 +22,8 @@
 
 #include <glib.h>
 
+#include <assert.h>
+
 /**
  * Manager for a temporary buffer which grows as needed.  We could
  * allocate a new buffer every time pcm_convert() is called, but that
@@ -39,6 +41,8 @@ struct pcm_buffer {
 static inline void
 pcm_buffer_init(struct pcm_buffer *buffer)
 {
+	assert(buffer != NULL);
+
 	buffer->buffer = NULL;
 	buffer->size = 0;
 }
@@ -49,6 +53,8 @@ pcm_buffer_init(struct pcm_buffer *buffer)
 static inline void
 pcm_buffer_deinit(struct pcm_buffer *buffer)
 {
+	assert(buffer != NULL);
+
 	g_free(buffer->buffer);
 
 	buffer->buffer = NULL;