avcodec: add AV1 hardware accelerated decoder

This AV1 decoder is currently only used for hardware accelerated decoding.
It can be extended into a native decoder in the future, so set its name to
"av1" and temporarily give it the lowest priority in the codec list.

Signed-off-by: Fei Wang <fei.w.wang@intel.com>
Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/libavcodec/av1dec.h b/libavcodec/av1dec.h
new file mode 100644
index 0000000000..3604870299
--- /dev/null
+++ b/libavcodec/av1dec.h
@@ -0,0 +1,75 @@
+/*
+ * AV1 video decoder
+ * *
+ * 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_AV1DEC_H
+#define AVCODEC_AV1DEC_H
+
+#include <stdint.h>
+
+#include "libavutil/buffer.h"
+#include "libavutil/pixfmt.h"
+#include "avcodec.h"
+#include "cbs.h"
+#include "cbs_av1.h"
+#include "thread.h"
+
+typedef struct AV1Frame {
+    ThreadFrame tf;
+
+    AVBufferRef *hwaccel_priv_buf;
+    void *hwaccel_picture_private;
+
+    uint8_t loop_filter_delta_enabled;
+    int8_t  loop_filter_ref_deltas[AV1_NUM_REF_FRAMES];
+    int8_t  loop_filter_mode_deltas[2];
+    uint8_t gm_type[AV1_NUM_REF_FRAMES];
+    int32_t gm_params[AV1_NUM_REF_FRAMES][6];
+} AV1Frame;
+
+typedef struct TileGroupInfo {
+    uint32_t tile_offset;
+    uint32_t tile_size;
+    uint16_t tile_row;
+    uint16_t tile_column;
+} TileGroupInfo;
+
+typedef struct AV1DecContext {
+    const AVClass *class;
+    AVCodecContext *avctx;
+
+    enum AVPixelFormat pix_fmt;
+    CodedBitstreamContext *cbc;
+    CodedBitstreamFragment current_obu;
+
+    AVBufferRef *seq_ref;
+    AV1RawSequenceHeader *raw_seq;
+    AVBufferRef *header_ref;
+    AV1RawFrameHeader *raw_frame_header;
+    TileGroupInfo *tile_group_info;
+    uint16_t tile_num;
+    uint16_t tg_start;
+    uint16_t tg_end;
+
+    AV1Frame ref[AV1_NUM_REF_FRAMES];
+    AV1Frame cur_frame;
+
+} AV1DecContext;
+
+#endif /* AVCODEC_AV1DEC_H */