Merge pull request #850 from trav90/add-av1-support

Add initial support for AV1 video.

1 files changed, 208 insertions, 0 deletions

diff --git a/third_party/aom/av1/encoder/firstpass.h b/third_party/aom/av1/encoder/firstpass.h
new file mode 100644
index 000000000..4b7325ae2
--- /dev/null
+++ b/third_party/aom/av1/encoder/firstpass.h
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AV1_ENCODER_FIRSTPASS_H_
+#define AOM_AV1_ENCODER_FIRSTPASS_H_
+
+#include "av1/common/enums.h"
+#include "av1/common/onyxc_int.h"
+#include "av1/encoder/lookahead.h"
+#include "av1/encoder/ratectrl.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if CONFIG_FP_MB_STATS
+
+#define FPMB_DCINTRA_MASK 0x01
+
+#define FPMB_MOTION_ZERO_MASK 0x02
+#define FPMB_MOTION_LEFT_MASK 0x04
+#define FPMB_MOTION_RIGHT_MASK 0x08
+#define FPMB_MOTION_UP_MASK 0x10
+#define FPMB_MOTION_DOWN_MASK 0x20
+
+#define FPMB_ERROR_SMALL_MASK 0x40
+#define FPMB_ERROR_LARGE_MASK 0x80
+#define FPMB_ERROR_SMALL_TH 2000
+#define FPMB_ERROR_LARGE_TH 48000
+
+typedef struct {
+  uint8_t *mb_stats_start;
+  uint8_t *mb_stats_end;
+} FIRSTPASS_MB_STATS;
+#endif
+
+// Length of the bi-predictive frame group (BFG)
+// NOTE: Currently each BFG contains one backward ref (BWF) frame plus a certain
+//       number of bi-predictive frames.
+#define BFG_INTERVAL 2
+// The maximum number of extra ALTREF's except ALTREF_FRAME
+#define MAX_EXT_ARFS (REF_FRAMES - BWDREF_FRAME - 1)
+
+#define MIN_EXT_ARF_INTERVAL 4
+
+#define MIN_ZERO_MOTION 0.95
+#define MAX_SR_CODED_ERROR 40
+#define MAX_RAW_ERR_VAR 2000
+#define MIN_MV_IN_OUT 0.4
+
+#define VLOW_MOTION_THRESHOLD 950
+
+typedef struct {
+  double frame;
+  double weight;
+  double intra_error;
+  double frame_avg_wavelet_energy;
+  double coded_error;
+  double sr_coded_error;
+  double pcnt_inter;
+  double pcnt_motion;
+  double pcnt_second_ref;
+  double pcnt_neutral;
+  double intra_skip_pct;
+  double inactive_zone_rows;  // Image mask rows top and bottom.
+  double inactive_zone_cols;  // Image mask columns at left and right edges.
+  double MVr;
+  double mvr_abs;
+  double MVc;
+  double mvc_abs;
+  double MVrv;
+  double MVcv;
+  double mv_in_out_count;
+  double new_mv_count;
+  double duration;
+  double count;
+  // standard deviation for (0, 0) motion prediction error
+  double raw_error_stdev;
+} FIRSTPASS_STATS;
+
+typedef enum {
+  KF_UPDATE = 0,
+  LF_UPDATE = 1,
+  GF_UPDATE = 2,
+  ARF_UPDATE = 3,
+  OVERLAY_UPDATE = 4,
+  BRF_UPDATE = 5,            // Backward Reference Frame
+  LAST_BIPRED_UPDATE = 6,    // Last Bi-predictive Frame
+  BIPRED_UPDATE = 7,         // Bi-predictive Frame, but not the last one
+  INTNL_OVERLAY_UPDATE = 8,  // Internal Overlay Frame
+  INTNL_ARF_UPDATE = 9,      // Internal Altref Frame (candidate for ALTREF2)
+  FRAME_UPDATE_TYPES = 10
+} FRAME_UPDATE_TYPE;
+
+#define FC_ANIMATION_THRESH 0.15
+typedef enum {
+  FC_NORMAL = 0,
+  FC_GRAPHICS_ANIMATION = 1,
+  FRAME_CONTENT_TYPES = 2
+} FRAME_CONTENT_TYPE;
+
+typedef struct {
+  unsigned char index;
+  RATE_FACTOR_LEVEL rf_level[(MAX_LAG_BUFFERS * 2) + 1];
+  FRAME_UPDATE_TYPE update_type[(MAX_LAG_BUFFERS * 2) + 1];
+  unsigned char arf_src_offset[(MAX_LAG_BUFFERS * 2) + 1];
+  unsigned char arf_update_idx[(MAX_LAG_BUFFERS * 2) + 1];
+  unsigned char arf_ref_idx[(MAX_LAG_BUFFERS * 2) + 1];
+#if USE_SYMM_MULTI_LAYER
+  unsigned char arf_pos_in_gf[(MAX_LAG_BUFFERS * 2) + 1];
+  unsigned char pyramid_level[(MAX_LAG_BUFFERS * 2) + 1];
+  unsigned char pyramid_height;
+  unsigned char pyramid_lvl_nodes[MAX_PYRAMID_LVL];
+#endif
+  unsigned char brf_src_offset[(MAX_LAG_BUFFERS * 2) + 1];
+  unsigned char bidir_pred_enabled[(MAX_LAG_BUFFERS * 2) + 1];
+  unsigned char ref_fb_idx_map[(MAX_LAG_BUFFERS * 2) + 1][REF_FRAMES];
+  unsigned char refresh_idx[(MAX_LAG_BUFFERS * 2) + 1];
+  unsigned char refresh_flag[(MAX_LAG_BUFFERS * 2) + 1];
+  int bit_allocation[(MAX_LAG_BUFFERS * 2) + 1];
+} GF_GROUP;
+
+typedef struct {
+  unsigned int section_intra_rating;
+  FIRSTPASS_STATS total_stats;
+  FIRSTPASS_STATS this_frame_stats;
+  const FIRSTPASS_STATS *stats_in;
+  const FIRSTPASS_STATS *stats_in_start;
+  const FIRSTPASS_STATS *stats_in_end;
+  FIRSTPASS_STATS total_left_stats;
+  int first_pass_done;
+  int64_t bits_left;
+  double modified_error_min;
+  double modified_error_max;
+  double modified_error_left;
+  double mb_av_energy;
+  double frame_avg_haar_energy;
+
+#if CONFIG_FP_MB_STATS
+  uint8_t *frame_mb_stats_buf;
+  uint8_t *this_frame_mb_stats;
+  FIRSTPASS_MB_STATS firstpass_mb_stats;
+#endif
+  // An indication of the content type of the current frame
+  FRAME_CONTENT_TYPE fr_content_type;
+
+  // Projected total bits available for a key frame group of frames
+  int64_t kf_group_bits;
+
+  // Error score of frames still to be coded in kf group
+  int64_t kf_group_error_left;
+
+  // The fraction for a kf groups total bits allocated to the inter frames
+  double kfgroup_inter_fraction;
+
+  int sr_update_lag;
+
+  int kf_zeromotion_pct;
+  int last_kfgroup_zeromotion_pct;
+  int gf_zeromotion_pct;
+  int active_worst_quality;
+  int baseline_active_worst_quality;
+  int extend_minq;
+  int extend_maxq;
+  int extend_minq_fast;
+
+  GF_GROUP gf_group;
+} TWO_PASS;
+
+struct AV1_COMP;
+
+void av1_init_first_pass(struct AV1_COMP *cpi);
+void av1_rc_get_first_pass_params(struct AV1_COMP *cpi);
+void av1_first_pass(struct AV1_COMP *cpi, const struct lookahead_entry *source);
+void av1_end_first_pass(struct AV1_COMP *cpi);
+
+void av1_init_second_pass(struct AV1_COMP *cpi);
+void av1_rc_get_second_pass_params(struct AV1_COMP *cpi);
+void av1_configure_buffer_updates_firstpass(struct AV1_COMP *cpi,
+                                            FRAME_UPDATE_TYPE update_type);
+
+// Post encode update of the rate control parameters for 2-pass
+void av1_twopass_postencode_update(struct AV1_COMP *cpi);
+
+static INLINE int get_number_of_extra_arfs(int interval, int arf_pending) {
+  if (arf_pending && MAX_EXT_ARFS > 0)
+    return interval >= MIN_EXT_ARF_INTERVAL * (MAX_EXT_ARFS + 1)
+               ? MAX_EXT_ARFS
+               : interval >= MIN_EXT_ARF_INTERVAL * MAX_EXT_ARFS
+                     ? MAX_EXT_ARFS - 1
+                     : 0;
+  else
+    return 0;
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AV1_ENCODER_FIRSTPASS_H_