vda: fix h264 decoding for avcC,vda wants the entire buffer

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

libavcodec/h264.c

@@ -1588,7 +1588,7 @@ again:
                         decode_postinit(h, nal_index >= nals_needed);
 
                     if (h->avctx->hwaccel &&
-                        (ret = h->avctx->hwaccel->start_frame(h->avctx, NULL, 0)) < 0)
+                        (ret = h->avctx->hwaccel->start_frame(h->avctx, buf, buf_size)) < 0)
                         return ret;
                     if (CONFIG_H264_VDPAU_DECODER &&
                         h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)

libavcodec/vda_h264.c

@@ -320,9 +320,20 @@ static int vda_h264_start_frame(AVCodecContext *avctx,
                                 uint32_t size)
 {
     VDAContext *vda = avctx->internal->hwaccel_priv_data;
+    H264Context *h  = avctx->priv_data;
 
+    if (h->is_avc == 1) {
+        void *tmp;
         vda->bitstream_size = 0;
-
+        tmp = av_fast_realloc(vda->bitstream,
+                              &vda->allocated_size,
+                              size);
+        vda->bitstream = tmp;
+        memcpy(vda->bitstream, buffer, size);
+        vda->bitstream_size = size;
+    } else {
+        vda->bitstream_size = 0;
+    }
     return 0;
 }
 
@@ -333,6 +344,9 @@ static int vda_h264_decode_slice(AVCodecContext *avctx,
     VDAContext *vda       = avctx->internal->hwaccel_priv_data;
     void *tmp;
 
+    if (h->is_avc == 1)
+        return 0;
+
     tmp = av_fast_realloc(vda->bitstream,
                           &vda->allocated_size,
                           vda->bitstream_size + size + 4);