Work on negotiation

Add helpers to convert between pinos and gstreamer formats.
Use pinos formats in the API.
Work on removing some hardcoded stuff and instead use the real format
from the pinos server.
Use memfd and sealing.

spa/include/spa/buffer.h

@@ -102,37 +102,29 @@ typedef struct {
 /**
  * SpaData:
  * @mem: reference to the memory to use
- * @offset: ofset in memory
- * @size: size of memory
  * @stride: stride of memory if applicable
  */
 typedef struct {
-  SpaMemoryRef mem;
-  off_t        offset;
-  size_t       size;
-  size_t       stride;
+  SpaMemoryChunk mem;
+  ssize_t        stride;
 } SpaData;
 
 /**
  * SpaBuffer:
  * @id: buffer id
  * @mem: reference to the memory for this buffer
- * @offset: offset inside memory
- * @size: of of memory
  * @n_metas: number of metadata
  * @metas: offset of array of @n_metas metadata
  * @n_datas: number of data pointers
  * @datas: offset of array of @n_datas data pointers
  */
 struct _SpaBuffer {
-  uint32_t          id;
-  SpaMemoryRef      mem;
-  off_t             offset;
-  size_t            size;
-  unsigned int      n_metas;
-  off_t             metas;
-  unsigned int      n_datas;
-  off_t             datas;
+  uint32_t       id;
+  SpaMemoryChunk mem;
+  unsigned int   n_metas;
+  off_t          metas;
+  unsigned int   n_datas;
+  off_t          datas;
 };
 
 #define SPA_BUFFER_METAS(b)        (SPA_MEMBER ((b), (b)->metas, SpaMeta))

spa/include/spa/control.h

@@ -91,8 +91,8 @@ typedef enum {
 /*  SPA_CONTROL_CMD_NODE_UPDATE */
 typedef struct {
   uint32_t        change_mask;
-  uint32_t        max_input_ports;
-  uint32_t        max_output_ports;
+  unsigned int    max_input_ports;
+  unsigned int    max_output_ports;
   const SpaProps *props;
 } SpaControlCmdNodeUpdate;
 
@@ -100,8 +100,8 @@ typedef struct {
 typedef struct {
   uint32_t           port_id;
   uint32_t           change_mask;
-  uint32_t           direction;
-  uint32_t           n_possible_formats;
+  SpaDirection       direction;
+  unsigned int       n_possible_formats;
   const SpaFormat  **possible_formats;
   const SpaProps    *props;
   const SpaPortInfo *info;
@@ -132,8 +132,8 @@ typedef struct {
 
 /* SPA_CONTROL_CMD_ADD_PORT */
 typedef struct {
-  uint32_t port_id;
-  uint32_t direction;
+  uint32_t     port_id;
+  SpaDirection direction;
 } SpaControlCmdAddPort;
 
 /* SPA_CONTROL_CMD_REMOVE_PORT */
@@ -152,7 +152,7 @@ typedef struct {
 typedef struct {
   uint32_t   port_id;
   uint32_t   id;
-  uint32_t   size;
+  size_t     size;
   void      *value;
 } SpaControlCmdSetProperty;
 
@@ -164,24 +164,22 @@ typedef struct {
   uint32_t     port_id;
   SpaMemoryRef mem;
   uint32_t     mem_type;
-  uint32_t     fd_index;
+  unsigned int fd_index;
   uint32_t     flags;
-  uint64_t     size;
+  size_t       size;
 } SpaControlCmdAddMem;
 
 /* SPA_CONTROL_CMD_REMOVE_MEM */
 typedef struct {
-  uint32_t port_id;
+  uint32_t     port_id;
   SpaMemoryRef mem;
 } SpaControlCmdRemoveMem;
 
 /* SPA_CONTROL_CMD_ADD_BUFFER */
 typedef struct {
-  uint32_t     port_id;
-  uint32_t     buffer_id;
-  SpaMemoryRef mem;
-  off_t        offset;
-  size_t       size;
+  uint32_t       port_id;
+  uint32_t       buffer_id;
+  SpaMemoryChunk mem;
 } SpaControlCmdAddBuffer;
 
 /* SPA_CONTROL_CMD_REMOVE_BUFFER */
@@ -194,16 +192,16 @@ typedef struct {
 typedef struct {
   uint32_t port_id;
   uint32_t buffer_id;
-  uint64_t offset;
-  uint64_t size;
+  off_t    offset;
+  size_t   size;
 } SpaControlCmdProcessBuffer;
 
 /* SPA_CONTROL_CMD_REUSE_BUFFER */
 typedef struct {
   uint32_t port_id;
   uint32_t buffer_id;
-  uint64_t offset;
-  uint64_t size;
+  off_t    offset;
+  size_t   size;
 } SpaControlCmdReuseBuffer;
 
 
@@ -221,7 +219,8 @@ SpaResult          spa_control_iter_next        (SpaControlIter *iter);
 SpaResult          spa_control_iter_end         (SpaControlIter *iter);
 
 SpaControlCmd      spa_control_iter_get_cmd     (SpaControlIter *iter);
-void *             spa_control_iter_get_data    (SpaControlIter *iter, size_t *size);
+void *             spa_control_iter_get_data    (SpaControlIter *iter,
+                                                 size_t *size);
 
 SpaResult          spa_control_iter_parse_cmd   (SpaControlIter *iter,
                                                  void           *command);

spa/include/spa/format.h

@@ -62,22 +62,34 @@ typedef enum {
  * @media_type: media type
  * @media_subtype: subtype
  * @mem: memory reference
+ * @offset: offset in memory
+ * @size: size in memory
  */
 struct _SpaFormat {
   SpaProps         props;
   SpaMediaType     media_type;
   SpaMediaSubType  media_subtype;
-  SpaMemoryRef     mem;
+  SpaMemoryChunk   mem;
 };
 
-#define spa_format_ref(f)    spa_memory_ref(&(f)->mem)
-#define spa_format_unref(f)  spa_memory_unref(&(f)->mem)
+static inline void
+spa_format_ref (SpaFormat *format)
+{
+  spa_memory_ref (&format->mem.mem);
+}
+
+static inline void
+spa_format_unref (SpaFormat *format)
+{
+  spa_memory_unref (&format->mem.mem);
+}
 
 typedef enum {
   SPA_PROP_ID_INVALID            = 0,
   SPA_PROP_ID_MEDIA_CUSTOM_START = 200,
 } SpaFormatProps;
 
+
 #ifdef __cplusplus
 }  /* extern "C" */
 #endif

spa/include/spa/memory.h

@@ -26,6 +26,7 @@ extern "C" {
 
 typedef struct _SpaMemory SpaMemory;
 typedef struct _SpaMemoryRef SpaMemoryRef;
+typedef struct _SpaMemoryChunk SpaMemoryChunk;
 typedef struct _SpaMemoryPool SpaMemoryPool;
 
 #include <spa/defs.h>
@@ -48,12 +49,27 @@ typedef enum {
  * SpaMemoryRef:
  * @pool_id: the pool id
  * @id: mem_id
+ *
+ * A reference to a block of memory
  */
 struct _SpaMemoryRef {
   uint32_t  pool_id;
   uint32_t  id;
 };
 
+/**
+ * SpaMemoryChunk:
+ * @mem: the memory
+ * @offset: the offset in the memory
+ * @size: the size in the memory
+ *
+ * A reference to a part of memory
+ */
+struct _SpaMemoryChunk {
+  SpaMemoryRef mem;
+  off_t        offset;
+  size_t       size;
+};
 /**
  * SpaMemory:
  * @refcount: a refcount