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+/*
+ * 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
+ */
+
+/**
+ * @file
+ * AV1 common definitions
+ */
+
+#ifndef AVCODEC_AV1_H
+#define AVCODEC_AV1_H
+
+// OBU types (section 6.2.2).
+typedef enum {
+ // 0 reserved.
+ AV1_OBU_SEQUENCE_HEADER = 1,
+ AV1_OBU_TEMPORAL_DELIMITER = 2,
+ AV1_OBU_FRAME_HEADER = 3,
+ AV1_OBU_TILE_GROUP = 4,
+ AV1_OBU_METADATA = 5,
+ AV1_OBU_FRAME = 6,
+ AV1_OBU_REDUNDANT_FRAME_HEADER = 7,
+ AV1_OBU_TILE_LIST = 8,
+ // 9-14 reserved.
+ AV1_OBU_PADDING = 15,
+} AV1_OBU_Type;
+
+// Metadata types (section 6.7.1).
+enum {
+ AV1_METADATA_TYPE_HDR_CLL = 1,
+ AV1_METADATA_TYPE_HDR_MDCV = 2,
+ AV1_METADATA_TYPE_SCALABILITY = 3,
+ AV1_METADATA_TYPE_ITUT_T35 = 4,
+ AV1_METADATA_TYPE_TIMECODE = 5,
+};
+
+// Frame types (section 6.8.2).
+enum {
+ AV1_FRAME_KEY = 0,
+ AV1_FRAME_INTER = 1,
+ AV1_FRAME_INTRA_ONLY = 2,
+ AV1_FRAME_SWITCH = 3,
+};
+
+// Reference frames (section 6.10.24).
+enum {
+ AV1_REF_FRAME_INTRA = 0,
+ AV1_REF_FRAME_LAST = 1,
+ AV1_REF_FRAME_LAST2 = 2,
+ AV1_REF_FRAME_LAST3 = 3,
+ AV1_REF_FRAME_GOLDEN = 4,
+ AV1_REF_FRAME_BWDREF = 5,
+ AV1_REF_FRAME_ALTREF2 = 6,
+ AV1_REF_FRAME_ALTREF = 7,
+};
+
+// Constants (section 3).
+enum {
+ AV1_MAX_OPERATING_POINTS = 32,
+
+ AV1_MAX_SB_SIZE = 128,
+ AV1_MI_SIZE = 4,
+
+ AV1_MAX_TILE_WIDTH = 4096,
+ AV1_MAX_TILE_AREA = 4096 * 2304,
+ AV1_MAX_TILE_ROWS = 64,
+ AV1_MAX_TILE_COLS = 64,
+
+ AV1_NUM_REF_FRAMES = 8,
+ AV1_REFS_PER_FRAME = 7,
+ AV1_TOTAL_REFS_PER_FRAME = 8,
+ AV1_PRIMARY_REF_NONE = 7,
+
+ AV1_MAX_SEGMENTS = 8,
+ AV1_SEG_LVL_MAX = 8,
+
+ AV1_SEG_LVL_ALT_Q = 0,
+ AV1_SEG_LVL_ALT_LF_Y_V = 1,
+ AV1_SEG_LVL_REF_FRAME = 5,
+ AV1_SEG_LVL_SKIP = 6,
+ AV1_SEG_LVL_GLOBAL_MV = 7,
+
+ AV1_SELECT_SCREEN_CONTENT_TOOLS = 2,
+ AV1_SELECT_INTEGER_MV = 2,
+
+ AV1_SUPERRES_NUM = 8,
+ AV1_SUPERRES_DENOM_MIN = 9,
+
+ AV1_INTERPOLATION_FILTER_SWITCHABLE = 4,
+
+ AV1_GM_ABS_ALPHA_BITS = 12,
+ AV1_GM_ALPHA_PREC_BITS = 15,
+ AV1_GM_ABS_TRANS_ONLY_BITS = 9,
+ AV1_GM_TRANS_ONLY_PREC_BITS = 3,
+ AV1_GM_ABS_TRANS_BITS = 12,
+ AV1_GM_TRANS_PREC_BITS = 6,
+ AV1_WARPEDMODEL_PREC_BITS = 16,
+
+ AV1_WARP_MODEL_IDENTITY = 0,
+ AV1_WARP_MODEL_TRANSLATION = 1,
+ AV1_WARP_MODEL_ROTZOOM = 2,
+ AV1_WARP_MODEL_AFFINE = 3,
+ AV1_WARP_PARAM_REDUCE_BITS = 6,
+
+ AV1_DIV_LUT_BITS = 8,
+ AV1_DIV_LUT_PREC_BITS = 14,
+ AV1_DIV_LUT_NUM = 257,
+
+ AV1_MAX_LOOP_FILTER = 63,
+};
+
+
+// The main colour configuration information uses the same ISO/IEC 23001-8
+// (H.273) enums as FFmpeg does, so separate definitions are not required.
+
+// Chroma sample position.
+enum {
+ AV1_CSP_UNKNOWN = 0,
+ AV1_CSP_VERTICAL = 1, // -> AVCHROMA_LOC_LEFT.
+ AV1_CSP_COLOCATED = 2, // -> AVCHROMA_LOC_TOPLEFT.
+};
+
+// Scalability modes (section 6.7.5)
+enum {
+ AV1_SCALABILITY_L1T2 = 0,
+ AV1_SCALABILITY_L1T3 = 1,
+ AV1_SCALABILITY_L2T1 = 2,
+ AV1_SCALABILITY_L2T2 = 3,
+ AV1_SCALABILITY_L2T3 = 4,
+ AV1_SCALABILITY_S2T1 = 5,
+ AV1_SCALABILITY_S2T2 = 6,
+ AV1_SCALABILITY_S2T3 = 7,
+ AV1_SCALABILITY_L2T1h = 8,
+ AV1_SCALABILITY_L2T2h = 9,
+ AV1_SCALABILITY_L2T3h = 10,
+ AV1_SCALABILITY_S2T1h = 11,
+ AV1_SCALABILITY_S2T2h = 12,
+ AV1_SCALABILITY_S2T3h = 13,
+ AV1_SCALABILITY_SS = 14,
+ AV1_SCALABILITY_L3T1 = 15,
+ AV1_SCALABILITY_L3T2 = 16,
+ AV1_SCALABILITY_L3T3 = 17,
+ AV1_SCALABILITY_S3T1 = 18,
+ AV1_SCALABILITY_S3T2 = 19,
+ AV1_SCALABILITY_S3T3 = 20,
+ AV1_SCALABILITY_L3T2_KEY = 21,
+ AV1_SCALABILITY_L3T3_KEY = 22,
+ AV1_SCALABILITY_L4T5_KEY = 23,
+ AV1_SCALABILITY_L4T7_KEY = 24,
+ AV1_SCALABILITY_L3T2_KEY_SHIFT = 25,
+ AV1_SCALABILITY_L3T3_KEY_SHIFT = 26,
+ AV1_SCALABILITY_L4T5_KEY_SHIFT = 27,
+ AV1_SCALABILITY_L4T7_KEY_SHIFT = 28,
+};
+
+// Frame Restoration types (section 6.10.15)
+enum {
+ AV1_RESTORE_NONE = 0,
+ AV1_RESTORE_WIENER = 1,
+ AV1_RESTORE_SGRPROJ = 2,
+ AV1_RESTORE_SWITCHABLE = 3,
+};
+
+// Sequence Headers are actually unbounded because one can use
+// an arbitrary number of leading zeroes when encoding via uvlc.
+// The following estimate is based around using the lowest number
+// of bits for uvlc encoding.
+#define AV1_SANE_SEQUENCE_HEADER_MAX_BITS 3138
+
+#endif /* AVCODEC_AV1_H */