#define V4L_M2M_DEFAULT_OPTS \
{ "num_output_buffers", "Number of buffers in the output context",\
- OFFSET(output.num_buffers), AV_OPT_TYPE_INT, { .i64 = 16 }, 6, INT_MAX, FLAGS }
+ OFFSET(num_output_buffers), AV_OPT_TYPE_INT, { .i64 = 16 }, 6, INT_MAX, FLAGS }
-typedef struct V4L2m2mContext
-{
- AVClass *class;
+typedef struct V4L2m2mContext {
char devname[PATH_MAX];
int fd;
V4L2Context capture;
V4L2Context output;
- /* refcount of buffers held by the user */
- atomic_uint refcount;
-
/* dynamic stream reconfig */
AVCodecContext *avctx;
sem_t refsync;
+ atomic_uint refcount;
int reinit;
/* null frame/packet received */
int draining;
+
+ /* Reference to self; only valid while codec is active. */
+ AVBufferRef *self_ref;
} V4L2m2mContext;
+typedef struct V4L2m2mPriv
+{
+ AVClass *class;
+
+ V4L2m2mContext *context;
+ AVBufferRef *context_ref;
+
+ int num_output_buffers;
+ int num_capture_buffers;
+} V4L2m2mPriv;
+
+/**
+ * Allocate a new context and references for a V4L2 M2M instance.
+ *
+ * @param[in] ctx The AVCodecContext instantiated by the encoder/decoder.
+ * @param[out] ctx The V4L2m2mContext.
+ *
+ * @returns 0 in success, a negative error code otherwise.
+ */
+int ff_v4l2_m2m_create_context(AVCodecContext *avctx, V4L2m2mContext **s);
+
+
/**
* Probes the video nodes looking for the required codec capabilities.
*