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

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

15 files changed, 597 insertions, 3 deletions

diff --git a/Changelog b/Changelog
index c6d88b6cec..0bbeae77fc 100644
--- a/Changelog
+++ b/Changelog
@@ -70,6 +70,7 @@ easier to use. The changes are:
 - 4:2:2 H.264 decoding support
 - Pulseaudio input device
 - Prores encoder
+- Video Decoder Acceleration (VDA) HWAccel module.
 
 version 0.8:
 
diff --git a/MAINTAINERS b/MAINTAINERS
index e9803f3f55..829dfe1a0b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -237,6 +237,7 @@ Hardware acceleration:
   dxva2*                                Laurent Aimar
   libstagefright.cpp                    Mohamed Naufal
   vaapi*                                Gwenole Beauchesne
+  vda*                                  Sebastien Zwickert
   vdpau*                                Carl Eugen Hoyos
 
 
diff --git a/configure b/configure
index e688f587cc..279e4167d7 100755
--- a/configure
+++ b/configure
@@ -111,6 +111,7 @@ Configuration options:
   --enable-vaapi           enable VAAPI code [autodetect]
   --enable-vdpau           enable VDPAU code [autodetect]
   --disable-dxva2          disable DXVA2 code
+  --disable-vda            disable VDA code
   --enable-runtime-cpudetect detect cpu capabilities at runtime (bigger binary)
   --enable-hardcoded-tables use hardcoded tables instead of runtime generation
   --enable-memalign-hack   emulate memalign, interferes with memory debuggers
@@ -1052,6 +1053,7 @@ CONFIG_LIST="
     swscale_alpha
     thumb
     vaapi
+    vda
     vdpau
     version3
     x11grab
@@ -1377,6 +1379,8 @@ h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
 h264_dxva2_hwaccel_deps="dxva2api_h"
 h264_dxva2_hwaccel_select="dxva2 h264_decoder"
 h264_vaapi_hwaccel_select="vaapi"
+h264_vda_hwaccel_deps="VideoDecodeAcceleration_VDADecoder_h"
+h264_vda_hwaccel_select="vda"
 h264_vdpau_decoder_select="vdpau h264_decoder"
 imc_decoder_select="fft mdct sinewin"
 jpegls_decoder_select="golomb"
@@ -2955,6 +2959,7 @@ check_func_headers windows.h MapViewOfFile
 check_func_headers windows.h VirtualAlloc
 
 check_header dlfcn.h
+check_header VideoDecodeAcceleration/VDADecoder.h
 check_header dxva2api.h -D_WIN32_WINNT=0x0600
 check_header libcrystalhd/libcrystalhd_if.h
 check_header malloc.h
@@ -2970,6 +2975,11 @@ check_header X11/extensions/XvMClib.h
 disabled  zlib || check_lib   zlib.h      zlibVersion -lz   || disable  zlib
 disabled bzlib || check_lib2 bzlib.h BZ2_bzlibVersion -lbz2 || disable bzlib
 
+# adds ldflags for VDA module
+if enabled vda; then
+    add_ldflags -framework CoreFoundation -framework VideoDecodeAcceleration -framework QuartzCore
+fi
+
 # check for some common methods of building with pthread support
 # do this before the optional library checks as some of them require pthreads
 if ! disabled pthreads && ! enabled w32threads; then
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index b2c0c99214..0178f8fc6e 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -3,7 +3,7 @@ include $(SUBDIR)../config.mak
 NAME = avcodec
 FFLIBS = avutil
 
-HEADERS = avcodec.h avfft.h dxva2.h opt.h vaapi.h vdpau.h version.h xvmc.h
+HEADERS = avcodec.h avfft.h dxva2.h opt.h vaapi.h vda.h vdpau.h version.h xvmc.h
 
 OBJS = allcodecs.o                                                      \
        audioconvert.o                                                   \
@@ -49,6 +49,7 @@ RDFT-OBJS-$(CONFIG_HARDCODED_TABLES)   += sin_tables.o
 OBJS-$(CONFIG_RDFT)                    += rdft.o $(RDFT-OBJS-yes)
 OBJS-$(CONFIG_SINEWIN)                 += sinewin.o
 OBJS-$(CONFIG_VAAPI)                   += vaapi.o
+OBJS-$(CONFIG_VDA)                     += vda.o
 OBJS-$(CONFIG_VDPAU)                   += vdpau.o
 
 # decoders/encoders/hardware accelerators
@@ -192,6 +193,7 @@ OBJS-$(CONFIG_H264_DECODER)            += h264.o                               \
                                           mpegvideo.o error_resilience.o
 OBJS-$(CONFIG_H264_DXVA2_HWACCEL)      += dxva2_h264.o
 OBJS-$(CONFIG_H264_VAAPI_HWACCEL)      += vaapi_h264.o
+OBJS-$(CONFIG_H264_VDA_HWACCEL)        += vda_h264.o
 OBJS-$(CONFIG_HUFFYUV_DECODER)         += huffyuv.o
 OBJS-$(CONFIG_HUFFYUV_ENCODER)         += huffyuv.o
 OBJS-$(CONFIG_IDCIN_DECODER)           += idcinvideo.o
@@ -703,6 +705,7 @@ SKIPHEADERS-$(CONFIG_DXVA2)            += dxva2.h dxva2_internal.h
 SKIPHEADERS-$(CONFIG_LIBDIRAC)         += libdirac.h
 SKIPHEADERS-$(CONFIG_LIBSCHROEDINGER)  += libschroedinger.h
 SKIPHEADERS-$(CONFIG_VAAPI)            += vaapi_internal.h
+SKIPHEADERS-$(CONFIG_VDA)              += vda_internal.h
 SKIPHEADERS-$(CONFIG_VDPAU)            += vdpau.h
 SKIPHEADERS-$(CONFIG_XVMC)             += xvmc.h
 SKIPHEADERS-$(HAVE_W32THREADS)         += w32pthreads.h
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 1119dd1e7e..7ba2ab3f89 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -57,6 +57,7 @@ void avcodec_register_all(void)
     REGISTER_HWACCEL (H263_VAAPI, h263_vaapi);
     REGISTER_HWACCEL (H264_DXVA2, h264_dxva2);
     REGISTER_HWACCEL (H264_VAAPI, h264_vaapi);
+    REGISTER_HWACCEL (H264_VDA, h264_vda);
     REGISTER_HWACCEL (MPEG1_VDPAU, mpeg1_vdpau);
     REGISTER_HWACCEL (MPEG2_DXVA2, mpeg2_dxva2);
     REGISTER_HWACCEL (MPEG2_VAAPI, mpeg2_vaapi);
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 3302f71993..3f6bc7290b 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -56,6 +56,7 @@ static const uint8_t div6[QP_MAX_NUM+1]={
 static const enum PixelFormat hwaccel_pixfmt_list_h264_jpeg_420[] = {
     PIX_FMT_DXVA2_VLD,
     PIX_FMT_VAAPI_VLD,
+    PIX_FMT_VDA_VLD,
     PIX_FMT_YUVJ420P,
     PIX_FMT_NONE
 };
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index fffa36a456..29500ea7b8 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -118,6 +118,7 @@ const enum PixelFormat ff_pixfmt_list_420[] = {
 const enum PixelFormat ff_hwaccel_pixfmt_list_420[] = {
     PIX_FMT_DXVA2_VLD,
     PIX_FMT_VAAPI_VLD,
+    PIX_FMT_VDA_VLD,
     PIX_FMT_YUV420P,
     PIX_FMT_NONE
 };
diff --git a/libavcodec/vda.c b/libavcodec/vda.c
new file mode 100644
index 0000000000..5fe8a48fa4
--- /dev/null
+++ b/libavcodec/vda.c
@@ -0,0 +1,271 @@
+/*
+ * 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
+ */
+
+#include "vda_internal.h"
+
+/**
+ * \addtogroup VDA_Decoding
+ *
+ * @{
+ */
+
+/* Mutex manager callback. */
+static int vda_lock_operation(void **mtx, enum AVLockOp op)
+{
+    switch(op)
+    {
+        case AV_LOCK_CREATE:
+            *mtx = av_malloc(sizeof(pthread_mutex_t));
+            if(!*mtx)
+                return 1;
+            return !!pthread_mutex_init(*mtx, NULL);
+        case AV_LOCK_OBTAIN:
+            return !!pthread_mutex_lock(*mtx);
+        case AV_LOCK_RELEASE:
+            return !!pthread_mutex_unlock(*mtx);
+        case AV_LOCK_DESTROY:
+            pthread_mutex_destroy(*mtx);
+            av_freep(mtx);
+            return 0;
+    }
+    return 1;
+}
+
+/* Helper to create a dictionary according to the given pts. */
+static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
+{
+    CFStringRef key = CFSTR("FF_VDA_DECODER_PTS_KEY");
+    CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt64Type, &i_pts);
+    CFDictionaryRef user_info = CFDictionaryCreate( kCFAllocatorDefault,
+                                                    (const void **)&key,
+                                                    (const void **)&value,
+                                                    1,
+                                                    &kCFTypeDictionaryKeyCallBacks,
+                                                    &kCFTypeDictionaryValueCallBacks);
+    CFRelease(value);
+    return user_info;
+}
+
+/* Helper to retrieve the pts from the given dictionary. */
+static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
+{
+    CFNumberRef pts;
+    int64_t outValue = 0;
+
+    if (NULL == user_info)
+        return 0;
+
+    pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));
+
+    if (pts)
+        CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);
+
+    return outValue;
+}
+
+/* Removes and releases all frames from the queue. */
+static void vda_clear_queue(struct vda_context *vda_ctx)
+{
+    vda_frame *top_frame;
+
+    vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
+
+    while (vda_ctx->queue != NULL)
+    {
+        top_frame = vda_ctx->queue;
+        vda_ctx->queue = top_frame->next_frame;
+        ff_vda_release_vda_frame(top_frame);
+    }
+
+    vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
+}
+
+
+/* Decoder callback that adds the vda frame to the queue in display order. */
+static void vda_decoder_callback (void *vda_hw_ctx,
+                                  CFDictionaryRef user_info,
+                                  OSStatus status,
+                                  uint32_t infoFlags,
+                                  CVImageBufferRef image_buffer)
+{
+    struct vda_context *vda_ctx = (struct vda_context*)vda_hw_ctx;
+    vda_frame *new_frame;
+    vda_frame *queue_walker;
+
+    if (NULL == image_buffer)
+        return;
+
+    if (kCVPixelFormatType_422YpCbCr8 != CVPixelBufferGetPixelFormatType(image_buffer))
+        return;
+
+    new_frame = (vda_frame *)av_mallocz(sizeof(vda_frame));
+    new_frame->next_frame = NULL;
+    new_frame->cv_buffer = CVPixelBufferRetain(image_buffer);
+    new_frame->pts = vda_pts_from_dictionary(user_info);
+
+    vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
+
+    queue_walker = vda_ctx->queue;
+
+    if (!queue_walker || (new_frame->pts < queue_walker->pts))
+    {
+        /* we have an empty queue, or this frame earlier than the current queue head */
+        new_frame->next_frame = queue_walker;
+        vda_ctx->queue = new_frame;
+    }
+    else
+    {
+        /* walk the queue and insert this frame where it belongs in display order */
+        vda_frame *next_frame;
+
+        while (1)
+        {
+            next_frame = queue_walker->next_frame;
+
+            if (!next_frame || (new_frame->pts < next_frame->pts))
+            {
+                new_frame->next_frame = next_frame;
+                queue_walker->next_frame = new_frame;
+                break;
+            }
+            queue_walker = next_frame;
+        }
+    }
+
+    vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
+}
+
+int ff_vda_create_decoder(struct vda_context *vda_ctx,
+                          uint8_t *extradata,
+                          int extradata_size)
+{
+    OSStatus status = kVDADecoderNoErr;
+    CFNumberRef height;
+    CFNumberRef width;
+    CFNumberRef format;
+    CFDataRef avc_data;
+    CFMutableDictionaryRef config_info;
+
+    if (av_lockmgr_register(vda_lock_operation))
+        return -1;
+
+    vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_CREATE);
+
+    config_info = (CFDictionaryCreateMutable(kCFAllocatorDefault,
+                                             4,
+                                             &kCFTypeDictionaryKeyCallBacks,
+                                             &kCFTypeDictionaryValueCallBacks));
+
+    height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
+    width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
+    format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
+    avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
+
+    CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
+    CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
+    CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
+    CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
+
+    status = VDADecoderCreate( config_info,
+                               NULL,
+                               (VDADecoderOutputCallback *)vda_decoder_callback,
+                               (void *)vda_ctx,
+                               &vda_ctx->decoder );
+
+    CFRelease(height);
+    CFRelease(width);
+    CFRelease(format);
+    CFRelease(avc_data);
+    CFRelease(config_info);
+
+    if (kVDADecoderNoErr != status)
+        return status;
+
+    return 0;
+}
+
+int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
+{
+    OSStatus status = kVDADecoderNoErr;
+
+    if (vda_ctx->decoder)
+        status = VDADecoderDestroy(vda_ctx->decoder);
+
+    vda_clear_queue(vda_ctx);
+
+    if (vda_ctx->queue_mutex != NULL)
+        vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_DESTROY);
+
+    if (kVDADecoderNoErr != status)
+        return status;
+
+    return 0;
+}
+
+vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
+{
+    vda_frame *top_frame;
+
+    if (!vda_ctx->queue)
+        return NULL;
+
+    vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
+    top_frame = vda_ctx->queue;
+    vda_ctx->queue = top_frame->next_frame;
+    vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
+
+    return top_frame;
+}
+
+void ff_vda_release_vda_frame(vda_frame *frame)
+{
+    if (frame != NULL)
+    {
+        CVPixelBufferRelease(frame->cv_buffer);
+        av_freep(&frame);
+    }
+}
+
+int ff_vda_decoder_decode(struct vda_context *vda_ctx,
+                          uint8_t *bitstream,
+                          int bitstream_size,
+                          int64_t frame_pts)
+{
+    OSStatus status = kVDADecoderNoErr;
+    CFDictionaryRef user_info;
+    CFDataRef coded_frame;
+
+    coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
+    user_info = vda_dictionary_with_pts(frame_pts);
+
+    status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);
+
+    CFRelease(user_info);
+    CFRelease(coded_frame);
+
+    if (kVDADecoderNoErr != status)
+        return status;
+
+    return 0;
+}
+
+/* @} */
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 */
diff --git a/libavcodec/vda_h264.c b/libavcodec/vda_h264.c
new file mode 100644
index 0000000000..f4791a168c
--- /dev/null
+++ b/libavcodec/vda_h264.c
@@ -0,0 +1,107 @@
+/*
+ * VDA H264 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
+ */
+
+#include "vda_internal.h"
+
+/* This structure is used to store the bitstream of the current frame. */
+struct vda_picture_context {
+    uint8_t         *bitstream;
+    int              bitstream_size;
+};
+
+static int start_frame(AVCodecContext *avctx,
+                       av_unused const uint8_t *buffer,
+                       av_unused uint32_t size)
+{
+    const H264Context *h = avctx->priv_data;
+    struct vda_context *vda_ctx = avctx->hwaccel_context;
+    struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
+
+    if (!vda_ctx->decoder)
+        return -1;
+
+    pic_ctx->bitstream = NULL;
+    pic_ctx->bitstream_size = 0;
+
+    return 0;
+}
+
+static int decode_slice(AVCodecContext *avctx,
+                        const uint8_t *buffer,
+                        uint32_t size)
+{
+    H264Context *h = avctx->priv_data;
+    struct vda_context *vda_ctx = avctx->hwaccel_context;
+    struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
+    void *tmp;
+
+    if (!vda_ctx->decoder)
+        return -1;
+
+    tmp = av_realloc(pic_ctx->bitstream, pic_ctx->bitstream_size+size+4);
+    if (!tmp)
+        return AVERROR(ENOMEM);
+
+    pic_ctx->bitstream = tmp;
+
+    AV_WB32(pic_ctx->bitstream+pic_ctx->bitstream_size, size);
+    memcpy(pic_ctx->bitstream+pic_ctx->bitstream_size+4, buffer, size);
+
+    pic_ctx->bitstream_size += size + 4;
+
+    return 0;
+}
+
+static int end_frame(AVCodecContext *avctx)
+{
+    H264Context *h = avctx->priv_data;
+    struct vda_context *vda_ctx = avctx->hwaccel_context;
+    struct vda_picture_context *pic_ctx = h->s.current_picture_ptr->f.hwaccel_picture_private;
+    AVFrame *frame = (AVFrame*)h->s.current_picture_ptr;
+    int status;
+
+    if (!vda_ctx->decoder || !pic_ctx->bitstream)
+        return -1;
+
+    status = ff_vda_decoder_decode(vda_ctx, pic_ctx->bitstream,
+                                   pic_ctx->bitstream_size,
+                                   frame->reordered_opaque);
+
+    if (status)
+        av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
+
+    av_freep(&pic_ctx->bitstream);
+
+    return status;
+}
+
+AVHWAccel ff_h264_vda_hwaccel = {
+    .name           = "h264_vda",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_H264,
+    .pix_fmt        = PIX_FMT_VDA_VLD,
+    .capabilities   = 0,
+    .start_frame    = start_frame,
+    .decode_slice   = decode_slice,
+    .end_frame      = end_frame,
+    .priv_data_size = sizeof(struct vda_picture_context),
+};
diff --git a/libavcodec/vda_internal.h b/libavcodec/vda_internal.h
new file mode 100644
index 0000000000..c6dcaa8ff6
--- /dev/null
+++ b/libavcodec/vda_internal.h
@@ -0,0 +1,50 @@
+/*
+ * 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_INTERNAL_H
+#define AVCODEC_VDA_INTERNAL_H
+
+#include "h264.h"
+#include "h264data.h"
+
+#include "vda.h"
+
+#include <CoreFoundation/CFDictionary.h>
+#include <CoreFoundation/CFNumber.h>
+#include <CoreFoundation/CFData.h>
+#include <CoreFoundation/CFString.h>
+
+/**
+ * \addtogroup VDA_Decoding
+ *
+ * @{
+ */
+
+/** Send a frame data to the hardware decoder. */
+int ff_vda_decoder_decode(struct vda_context *vda_ctx,
+                          uint8_t *bitstream,
+                          int bitstream_size,
+                          int64_t frame_pts);
+
+/* @} */
+
+#endif /* AVCODEC_VDA_INTERNAL_H */
diff --git a/libavcodec/version.h b/libavcodec/version.h
index db9b8ddad6..ad64b6032a 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -21,7 +21,7 @@
 #define AVCODEC_VERSION_H
 
 #define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR 26
+#define LIBAVCODEC_VERSION_MINOR 27
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavutil/avutil.h b/libavutil/avutil.h
index d7eca65e6f..94e42714f1 100644
--- a/libavutil/avutil.h
+++ b/libavutil/avutil.h
@@ -40,7 +40,7 @@
 #define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
 
 #define LIBAVUTIL_VERSION_MAJOR 51
-#define LIBAVUTIL_VERSION_MINOR 22
+#define LIBAVUTIL_VERSION_MINOR 23
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
diff --git a/libavutil/pixdesc.c b/libavutil/pixdesc.c
index 5d0a9dfaeb..6648a7e8f5 100644
--- a/libavutil/pixdesc.c
+++ b/libavutil/pixdesc.c
@@ -1003,6 +1003,12 @@ const AVPixFmtDescriptor av_pix_fmt_descriptors[PIX_FMT_NB] = {
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
+    [PIX_FMT_VDA_VLD] = {
+        .name = "vda_vld",
+        .log2_chroma_w = 1,
+        .log2_chroma_h = 1,
+        .flags = PIX_FMT_HWACCEL,
+    },
     [PIX_FMT_GRAY8A] = {
         .name = "gray8a",
         .nb_components= 2,
diff --git a/libavutil/pixfmt.h b/libavutil/pixfmt.h
index 25c9ef99ff..6719e83489 100644
--- a/libavutil/pixfmt.h
+++ b/libavutil/pixfmt.h
@@ -158,6 +158,8 @@ enum PixelFormat {
     PIX_FMT_BGRA64LE,  ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is stored as little-endian
     PIX_FMT_GBR24P,    ///< planar GBR, 24bpp, 8G, 8B, 8R.
 
+    PIX_FMT_VDA_VLD,   ///< HW decoding through VDA.
+
     PIX_FMT_NB,        ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
 };