#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;
+ AVPacket buf_pkt;
+
+ /* Reference to a frame. Only used during encoding */
+ AVFrame *frame;
+
+ /* Reference to self; only valid while codec is active. */
+ AVBufferRef *self_ref;
+
+ /* reference back to V4L2m2mPriv */
+ void *priv;
} 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 V4L2m2mPriv 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(V4L2m2mPriv *priv, V4L2m2mContext **s);
+
+
/**
* Probes the video nodes looking for the required codec capabilities.
*
- * @param[in] ctx The AVCodecContext instantiated by the encoder/decoder.
+ * @param[in] ctx The V4L2m2mPriv instantiated by the encoder/decoder.
*
* @returns 0 if a driver is found, a negative number otherwise.
*/
-int ff_v4l2_m2m_codec_init(AVCodecContext *avctx);
+int ff_v4l2_m2m_codec_init(V4L2m2mPriv *priv);
/**
* Releases all the codec resources if all AVBufferRefs have been returned to the
* ctx. Otherwise keep the driver open.
*
- * @param[in] The AVCodecContext instantiated by the encoder/decoder.
+ * @param[in] The V4L2m2mPriv instantiated by the encoder/decoder.
*
* @returns 0
*
*/
-int ff_v4l2_m2m_codec_end(AVCodecContext *avctx);
+int ff_v4l2_m2m_codec_end(V4L2m2mPriv *priv);
/**
- * Reinitializes the V4L2m2mContext when the driver cant continue processing
+ * Reinitializes the V4L2m2mContext when the driver cannot continue processing
* with the capture parameters.
*
* @param[in] ctx The V4L2m2mContext instantiated by the encoder/decoder.
int ff_v4l2_m2m_codec_reinit(V4L2m2mContext *ctx);
/**
- * Reinitializes the V4L2m2mContext when the driver cant continue processing
+ * Reinitializes the V4L2m2mContext when the driver cannot continue processing
* with the any of the current V4L2Contexts (ie, changes in output and capture).
*
* @param[in] ctx The V4L2m2mContext instantiated by the encoder/decoder.