bridge: add dsp_stream_free_buffers()

Free a previously allocated stream data buffer.

Used by strmcopy command.

Signed-off-by: Víctor Manuel Jáquez Leal <vjaquez@igalia.com>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>

dsp_bridge.c

@@ -146,6 +146,7 @@
 #define STRM_ALLOCATEBUFFER	_IOWR(DB, DB_IOC(DB_STRM, 0), unsigned long)
 #define STRM_IDLE		_IOW(DB, DB_IOC(DB_STRM, 5), unsigned long)
 #define STRM_RECLAIM		_IOWR(DB, DB_IOC(DB_STRM, 8), unsigned long)
+#define STRM_FREEBUFFER	_IOWR(DB, DB_IOC(DB_STRM, 2), unsigned long)
 
 int dsp_open(void)
 {
@@ -1149,3 +1150,36 @@ bool dsp_stream_allocate_buffers(int handle,
 
 	return true;
 }
+
+struct stream_free_buffers {
+	void *stream;
+	unsigned char **buff;
+	unsigned int num_buf;
+};
+
+bool dsp_stream_free_buffers(int handle,
+			     void *stream,
+			     unsigned char **buff,
+			     unsigned int num_buf)
+{
+	unsigned int i;
+	struct stream_info info;
+	if (!get_stream_info(handle, stream, &info, sizeof(struct stream_info)))
+		return false;
+
+	if (info.segment) {
+		struct stream_free_buffers arg = {
+			.stream = stream,
+			.buff = buff,
+			.num_buf = num_buf,
+		};
+		return DSP_SUCCEEDED(ioctl(handle, STRM_FREEBUFFER, &arg));
+	}
+
+	for (i = 0; i < num_buf; i++) {
+		free(buff[i]);
+		buff[i] = NULL;
+	}
+
+	return true;
+}

dsp_bridge.h

@@ -435,4 +435,9 @@ bool dsp_stream_allocate_buffers(int handle,
 				 unsigned char **buff,
 				 unsigned int num_buf);
 
+bool dsp_stream_free_buffers(int handle,
+			     void *stream,
+			     unsigned char **buff,
+			     unsigned int num_buf);
+
 #endif /* DSP_BRIDGE_H */