* Public libavcodec VDA header.
*/
+#include "libavcodec/avcodec.h"
#include "libavcodec/version.h"
#include <stdint.h>
OSType cv_pix_fmt_type;
/**
- * The current bitstream buffer.
+ * unused
*/
uint8_t *priv_bitstream;
/**
- * The current size of the bitstream.
+ * unused
*/
int priv_bitstream_size;
/**
- * The reference size used for fast reallocation.
+ * unused
*/
int priv_allocated_size;
};
/** Destroy the video decoder. */
int ff_vda_destroy_decoder(struct vda_context *vda_ctx);
+/**
+ * This struct holds all the information that needs to be passed
+ * between the caller and libavcodec for initializing VDA decoding.
+ * Its size is not a part of the public ABI, it must be allocated with
+ * av_vda_alloc_context() and freed with av_free().
+ */
+typedef struct AVVDAContext {
+ /**
+ * VDA decoder object. Created and freed by the caller.
+ */
+ VDADecoder decoder;
+
+ /**
+ * The output callback that must be passed to VDADecoderCreate.
+ * Set by av_vda_alloc_context().
+ */
+ VDADecoderOutputCallback output_callback;
+
+ /**
+ * CVPixelBuffer Format Type that VDA will use for decoded frames; set by
+ * the caller.
+ */
+ OSType cv_pix_fmt_type;
+} AVVDAContext;
+
+/**
+ * Allocate and initialize a VDA context.
+ *
+ * This function should be called from the get_format() callback when the caller
+ * selects the AV_PIX_FMT_VDA format. The caller must then create the decoder
+ * object (using the output callback provided by libavcodec) that will be used
+ * for VDA-accelerated decoding.
+ *
+ * When decoding with VDA is finished, the caller must destroy the decoder
+ * object and free the VDA context using av_free().
+ *
+ * @return the newly allocated context or NULL on failure
+ */
+AVVDAContext *av_vda_alloc_context(void);
+
+/**
+ * This is a convenience function that creates and sets up the VDA context using
+ * an internal implementation.
+ *
+ * @param avctx the corresponding codec context
+ *
+ * @return >= 0 on success, a negative AVERROR code on failure
+ */
+int av_vda_default_init(AVCodecContext *avctx);
+
+/**
+ * This is a convenience function that creates and sets up the VDA context using
+ * an internal implementation.
+ *
+ * @param avctx the corresponding codec context
+ * @param vdactx the VDA context to use
+ *
+ * @return >= 0 on success, a negative AVERROR code on failure
+ */
+int av_vda_default_init2(AVCodecContext *avctx, AVVDAContext *vdactx);
+
+/**
+ * This function must be called to free the VDA context initialized with
+ * av_vda_default_init().
+ *
+ * @param avctx the corresponding codec context
+ */
+void av_vda_default_free(AVCodecContext *avctx);
+
/**
* @}
*/