lavc: Add coded bitstream read/write support for AV1

1 files changed, 88 insertions, 0 deletions

diff --git a/libavcodec/av1.h b/libavcodec/av1.h
index c989b69974..f2ec39c86b 100644
--- a/libavcodec/av1.h
+++ b/libavcodec/av1.h
@@ -39,4 +39,92 @@ typedef enum {
     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,
+};
+
+
+// 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.
+};
+
 #endif /* AVCODEC_AV1_H */