HWAccel: adds Video Decoder Acceleration (VDA) module for Mac OS X.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 140 insertions, 0 deletions

diff --git a/libavcodec/vda.h b/libavcodec/vda.h
new file mode 100644
index 0000000000..3f70cf2cf2
--- /dev/null
+++ b/libavcodec/vda.h
@@ -0,0 +1,140 @@
+/*
+ * VDA HW acceleration
+ *
+ * copyright (c) 2011 Sebastien Zwickert
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VDA_H
+#define AVCODEC_VDA_H
+
+#include <stdint.h>
+
+// emmintrin.h is unable to compile with -std=c99 -Werror=missing-prototypes
+// http://openradar.appspot.com/8026390
+#undef __GNUC_STDC_INLINE__
+
+#define Picture QuickdrawPicture
+
+#include <pthread.h>
+#include "avcodec.h"
+#include <VideoDecodeAcceleration/VDADecoder.h>
+
+/**
+ *  This structure is used to store a decoded frame information and data.
+ */
+typedef struct
+{
+    /**
+    * The PTS of the frame.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by libavcodec.
+    */
+    int64_t             pts;
+
+    /**
+    * The CoreVideo buffer that contains the decoded data.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by libavcodec.
+    */
+    CVPixelBufferRef    cv_buffer;
+
+    /**
+    * A pointer to the next frame.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by libavcodec.
+    */
+    struct vda_frame    *next_frame;
+
+} vda_frame;
+
+/**
+ * This structure is used to provide the necessary configurations and data
+ * to the VDA FFmpeg HWAccel implementation.
+ *
+ * The application must make it available as AVCodecContext.hwaccel_context.
+ */
+struct vda_context {
+
+    /**
+    * VDA decoder object.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by libavcodec.
+    */
+    VDADecoder          decoder;
+
+    /**
+    * VDA frames queue ordered by presentation timestamp.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by libavcodec.
+    */
+    vda_frame           *queue;
+
+    /**
+    * Mutex for locking queue operations.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by libavcodec.
+    */
+    void                *queue_mutex;
+
+    /**
+    * The frame width.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by user.
+    */
+    int                 width;
+
+    /**
+    * The frame height.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by user.
+    */
+    int                 height;
+
+    /**
+    * The frame format.
+    *
+    * - encoding: unused
+    * - decoding: Set/Unset by user.
+    */
+    int                 format;
+};
+
+/** Creates the video decoder. */
+int ff_vda_create_decoder(struct vda_context *vda_ctx,
+                          uint8_t *extradata,
+                          int extradata_size);
+
+/** Destroys the video decoder. */
+int ff_vda_destroy_decoder(struct vda_context *vda_ctx);
+
+/** Returns the top frame of the queue. */
+vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx);
+
+/** Releases the given frame. */
+void ff_vda_release_vda_frame(vda_frame *frame);
+
+#endif /* AVCODEC_VDA_H */