h264: Apply offset for proper CAPTURE mmap

There's an offset that applies to CAPTURE queue,
and apparently is obtained via QUERYBUF. Instead
of doing the QUERYBUF dance, just apply the offset.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>

libv4l-rockchip_v2/libvepu/h264e/h264e.c

@@ -660,18 +660,24 @@ static int h264e_assemble_bitstream(struct rk_venc *ictx, int fd,
 		return -1;
 
 	if (buffer->m.planes[0].bytesused + ctx->stream_header_size >
-	    buffer->m.planes[0].length)
+	    buffer->m.planes[0].length) {
+		fprintf(stderr, "Not enough space for H264 header\n");
 		return -1;
+	}
 
 	buffer->length = 1;
 
+#define DST_QUEUE_OFF_BASE (1 << 30)
 	buf = mmap(NULL, buffer->m.planes[0].length,
 			PROT_READ | PROT_WRITE,
 			MAP_SHARED, fd,
-			buffer->m.planes[0].m.mem_offset);
+			buffer->m.planes[0].m.mem_offset + DST_QUEUE_OFF_BASE);
 
-	if (buf == MAP_FAILED)
+	if (buf == MAP_FAILED) {
+		fprintf(stderr, "mmap failure! mem_offset %x\n",
+			buffer->m.planes[0].m.mem_offset + DST_QUEUE_OFF_BASE);
 		return -1;
+	}
 
 	memmove((uint8_t *)buf + ctx->stream_header_size, buf,
 		buffer->m.planes[0].bytesused);