lavc: Add new VDA hwaccel

It leverages the new hwaccel 1.2 features:

- get_buffer2 is never called
- the internal context is automatically initialized/deinitialized

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

1 files changed, 72 insertions, 0 deletions

diff --git a/libavcodec/vda.c b/libavcodec/vda.c
new file mode 100644
index 0000000000..f71fb16488
--- /dev/null
+++ b/libavcodec/vda.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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,
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "libavutil/mem.h"
+
+#include "vda.h"
+#include "vda_internal.h"
+
+#if CONFIG_H264_VDA_HWACCEL
+AVVDAContext *av_vda_alloc_context(void)
+{
+    AVVDAContext *ret = av_mallocz(sizeof(*ret));
+
+    if (ret)
+        ret->output_callback = ff_vda_output_callback;
+
+    return ret;
+}
+
+int av_vda_default_init(AVCodecContext *avctx)
+{
+    avctx->hwaccel_context = av_vda_alloc_context();
+    if (!avctx->hwaccel_context)
+        return AVERROR(ENOMEM);
+    return ff_vda_default_init(avctx);
+}
+
+void av_vda_default_free(AVCodecContext *avctx)
+{
+    ff_vda_default_free(avctx);
+    av_freep(&avctx->hwaccel_context);
+}
+
+void ff_vda_default_free(AVCodecContext *avctx)
+{
+    AVVDAContext *vda = avctx->hwaccel_context;
+    if (vda && vda->decoder)
+        VDADecoderDestroy(vda->decoder);
+}
+
+#else
+AVVDAContext *av_vda_alloc_context(void)
+{
+    return NULL;
+}
+
+int av_vda_default_init(AVCodecContext *avctx)
+{
+    return AVERROR(ENOSYS);
+}
+
+void av_vda_default_free(AVCodecContext *ctx)
+{
+}
+#endif