[FFmpeg-cvslog] avdevice/decklink_dec: do not copy video data

[Marton Balint]

ffmpeg | branch: master | Marton Balint <cus at passwd.hu> | Sun Apr 22 22:29:09 2018 +0200| [75d1529c6e9069b240bf6471d64e5bc81e0b9013] | committer: Marton Balint

avdevice/decklink_dec: do not copy video data

Create a buffer from the data instead and use the buffer destructor to free the
DeckLink frame. This avoids a memcpy of the frame data.

Signed-off-by: Marton Balint <cus at passwd.hu>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=75d1529c6e9069b240bf6471d64e5bc81e0b9013
---

 libavdevice/decklink_dec.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/libavdevice/decklink_dec.cpp b/libavdevice/decklink_dec.cpp
index e97a4402ea..10535dc388 100644
--- a/libavdevice/decklink_dec.cpp
+++ b/libavdevice/decklink_dec.cpp
@@ -98,6 +98,14 @@ static VANCLineNumber vanc_line_numbers[] = {
     {bmdModeUnknown, 0, -1, -1, -1}
 };
 
+extern "C" {
+static void decklink_object_free(void *opaque, uint8_t *data)
+{
+    IUnknown *obj = (class IUnknown *)opaque;
+    obj->Release();
+}
+}
+
 static int get_vanc_line_idx(BMDDisplayMode mode)
 {
     unsigned int i;
@@ -797,6 +805,10 @@ HRESULT decklink_input_callback::VideoInputFrameArrived(
             }
         }
 
+        pkt.buf = av_buffer_create(pkt.data, pkt.size, decklink_object_free, videoFrame, 0);
+        if (pkt.buf)
+            videoFrame->AddRef();
+
         if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
             ++ctx->dropped;
         }