1 files changed, 48 insertions, 15 deletions

diff --git a/libavcodec/vda_h264.c b/libavcodec/vda_h264.c
index 6c1845a676..1eff671f7f 100644
--- a/libavcodec/vda_h264.c
+++ b/libavcodec/vda_h264.c
@@ -1,34 +1,38 @@
 /*
- * VDA H.264 hardware acceleration
+ * VDA H264 HW acceleration.
  *
  * copyright (c) 2011 Sebastien Zwickert
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * 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.
  *
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <CoreFoundation/CFDictionary.h>
 #include <CoreFoundation/CFNumber.h>
 #include <CoreFoundation/CFData.h>
-#include <CoreFoundation/CFString.h>
 
+#include "vda.h"
 #include "libavutil/avutil.h"
 #include "h264.h"
-#include "vda.h"
 
-/* Decoder callback that adds the VDA frame to the queue in display order. */
+struct vda_buffer {
+    CVPixelBufferRef cv_buffer;
+};
+
+/* 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,
@@ -37,6 +41,9 @@ static void vda_decoder_callback(void *vda_hw_ctx,
 {
     struct vda_context *vda_ctx = vda_hw_ctx;
 
+    if (infoFlags & kVDADecodeInfo_FrameDropped)
+        vda_ctx->cv_buffer = NULL;
+
     if (!image_buffer)
         return;
 
@@ -71,7 +78,7 @@ static int vda_h264_start_frame(AVCodecContext *avctx,
                                 av_unused const uint8_t *buffer,
                                 av_unused uint32_t size)
 {
-    struct vda_context *vda_ctx         = avctx->hwaccel_context;
+    struct vda_context *vda_ctx = avctx->hwaccel_context;
 
     if (!vda_ctx->decoder)
         return -1;
@@ -85,7 +92,7 @@ static int vda_h264_decode_slice(AVCodecContext *avctx,
                                  const uint8_t *buffer,
                                  uint32_t size)
 {
-    struct vda_context *vda_ctx         = avctx->hwaccel_context;
+    struct vda_context *vda_ctx = avctx->hwaccel_context;
     void *tmp;
 
     if (!vda_ctx->decoder)
@@ -107,11 +114,20 @@ static int vda_h264_decode_slice(AVCodecContext *avctx,
     return 0;
 }
 
+static void vda_h264_release_buffer(void *opaque, uint8_t *data)
+{
+    struct vda_buffer *context = opaque;
+    CVPixelBufferRelease(context->cv_buffer);
+    av_free(context);
+}
+
 static int vda_h264_end_frame(AVCodecContext *avctx)
 {
     H264Context *h                      = avctx->priv_data;
     struct vda_context *vda_ctx         = avctx->hwaccel_context;
     AVFrame *frame                      = &h->cur_pic_ptr->f;
+    struct vda_buffer *context;
+    AVBufferRef *buffer;
     int status;
 
     if (!vda_ctx->decoder || !vda_ctx->priv_bitstream)
@@ -123,6 +139,20 @@ static int vda_h264_end_frame(AVCodecContext *avctx)
     if (status)
         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
 
+    if (!vda_ctx->use_ref_buffer || status)
+        return status;
+
+    context = av_mallocz(sizeof(*context));
+    buffer = av_buffer_create(NULL, 0, vda_h264_release_buffer, context, 0);
+    if (!context || !buffer) {
+        CVPixelBufferRelease(vda_ctx->cv_buffer);
+        av_free(context);
+        return -1;
+    }
+
+    context->cv_buffer = vda_ctx->cv_buffer;
+    frame->buf[3] = buffer;
+
     return status;
 }
 
@@ -130,7 +160,7 @@ int ff_vda_create_decoder(struct vda_context *vda_ctx,
                           uint8_t *extradata,
                           int extradata_size)
 {
-    OSStatus status = kVDADecoderNoErr;
+    OSStatus status;
     CFNumberRef height;
     CFNumberRef width;
     CFNumberRef format;
@@ -140,7 +170,10 @@ int ff_vda_create_decoder(struct vda_context *vda_ctx,
     CFMutableDictionaryRef io_surface_properties;
     CFNumberRef cv_pix_fmt;
 
-    /* Each VCL NAL in the bistream sent to the decoder
+    vda_ctx->priv_bitstream = NULL;
+    vda_ctx->priv_allocated_size = 0;
+
+    /* Each VCL NAL in the bitstream sent to the decoder
      * is preceded by a 4 bytes length header.
      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
     if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
@@ -182,9 +215,9 @@ int ff_vda_create_decoder(struct vda_context *vda_ctx,
                                                       0,
                                                       &kCFTypeDictionaryKeyCallBacks,
                                                       &kCFTypeDictionaryValueCallBacks);
-    cv_pix_fmt      = CFNumberCreate(kCFAllocatorDefault,
-                                     kCFNumberSInt32Type,
-                                     &vda_ctx->cv_pix_fmt_type);
+    cv_pix_fmt  = CFNumberCreate(kCFAllocatorDefault,
+                                 kCFNumberSInt32Type,
+                                 &vda_ctx->cv_pix_fmt_type);
     CFDictionarySetValue(buffer_attributes,
                          kCVPixelBufferPixelFormatTypeKey,
                          cv_pix_fmt);