#ifndef VP9_ENCODER_VP9_RATECTRL_H_
#define VP9_ENCODER_VP9_RATECTRL_H_
-#include "vp9/encoder/vp9_onyx_int.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
#define FRAME_OVERHEAD_BITS 200
-void vp9_save_coding_context(VP9_COMP *cpi);
-void vp9_restore_coding_context(VP9_COMP *cpi);
-
-void vp9_setup_key_frame(VP9_COMP *cpi);
-void vp9_setup_inter_frame(VP9_COMP *cpi);
+typedef struct {
+ // Rate targetting variables
+ int this_frame_target;
+ int projected_frame_size;
+ int sb64_target_rate;
+ int last_q[3]; // Separate values for Intra/Inter/ARF-GF
+ int last_boosted_qindex; // Last boosted GF/KF/ARF q
+
+ int gfu_boost;
+ int last_boost;
+ int kf_boost;
+
+ double rate_correction_factor;
+ double key_frame_rate_correction_factor;
+ double gf_rate_correction_factor;
+
+ unsigned int frames_since_golden;
+ unsigned int frames_till_gf_update_due; // Count down till next GF
+ unsigned int max_gf_interval;
+ unsigned int baseline_gf_interval;
+ unsigned int frames_to_key;
+ unsigned int frames_since_key;
+ unsigned int this_key_frame_forced;
+ unsigned int next_key_frame_forced;
+ unsigned int source_alt_ref_pending;
+ unsigned int source_alt_ref_active;
+ unsigned int is_src_frame_alt_ref;
+
+ int av_per_frame_bandwidth; // Average frame size target for clip
+ int min_frame_bandwidth; // Minimum allocation used for any frame
+ int max_frame_bandwidth; // Maximum burst rate allowed for a frame.
+
+ int ni_av_qi;
+ int ni_tot_qi;
+ int ni_frames;
+ int avg_frame_qindex[3]; // 0 - KEY, 1 - INTER, 2 - ARF/GF
+ double tot_q;
+ double avg_q;
+
+ int buffer_level;
+ int bits_off_target;
+
+ int decimation_factor;
+ int decimation_count;
+
+ int rolling_target_bits;
+ int rolling_actual_bits;
+
+ int long_rolling_target_bits;
+ int long_rolling_actual_bits;
+
+ int64_t total_actual_bits;
+ int total_target_vs_actual; // debug stats
+
+ int worst_quality;
+ int best_quality;
+ // int active_best_quality;
+} RATE_CONTROL;
+
+struct VP9_COMP;
+
+void vp9_save_coding_context(struct VP9_COMP *cpi);
+void vp9_restore_coding_context(struct VP9_COMP *cpi);
+
+void vp9_setup_key_frame(struct VP9_COMP *cpi);
+void vp9_setup_inter_frame(struct VP9_COMP *cpi);
double vp9_convert_qindex_to_q(int qindex);
-// Updates rate correction factors
-void vp9_rc_update_rate_correction_factors(VP9_COMP *cpi, int damp_var);
-
// initialize luts for minq
void vp9_rc_init_minq_luts(void);
-// return of 0 means drop frame
-// Changes only rc.this_frame_target and rc.sb64_rate_target
-int vp9_rc_pick_frame_size_target(VP9_COMP *cpi);
+// Generally at the high level, the following flow is expected
+// to be enforced for rate control:
+// First call per frame, one of:
+// vp9_rc_get_one_pass_vbr_params()
+// vp9_rc_get_one_pass_cbr_params()
+// vp9_rc_get_svc_params()
+// vp9_rc_get_first_pass_params()
+// vp9_rc_get_second_pass_params()
+// depending on the usage to set the rate control encode parameters desired.
+//
+// Then, call encode_frame_to_data_rate() to perform the
+// actual encode. This function will in turn call encode_frame()
+// one or more times, followed by one of:
+// vp9_rc_postencode_update()
+// vp9_rc_postencode_update_drop_frame()
+//
+// The majority of rate control parameters are only expected
+// to be set in the vp9_rc_get_..._params() functions and
+// updated during the vp9_rc_postencode_update...() functions.
+// The only exceptions are vp9_rc_drop_frame() and
+// vp9_rc_update_rate_correction_factors() functions.
+
+// Functions to set parameters for encoding before the actual
+// encode_frame_to_data_rate() function.
+void vp9_rc_get_one_pass_vbr_params(struct VP9_COMP *cpi);
+void vp9_rc_get_one_pass_cbr_params(struct VP9_COMP *cpi);
+void vp9_rc_get_svc_params(struct VP9_COMP *cpi);
+
+// Post encode update of the rate control parameters based
+// on bytes used
+void vp9_rc_postencode_update(struct VP9_COMP *cpi,
+ uint64_t bytes_used);
+// Post encode update of the rate control parameters for dropped frames
+void vp9_rc_postencode_update_drop_frame(struct VP9_COMP *cpi);
+
+// Updates rate correction factors
+// Changes only the rate correction factors in the rate control structure.
+void vp9_rc_update_rate_correction_factors(struct VP9_COMP *cpi, int damp_var);
+
+// Decide if we should drop this frame: For 1-pass CBR.
+// Changes only the decimation count in the rate control structure
+int vp9_rc_drop_frame(struct VP9_COMP *cpi);
-void vp9_rc_compute_frame_size_bounds(const VP9_COMP *cpi,
+// Computes frame size bounds.
+void vp9_rc_compute_frame_size_bounds(const struct VP9_COMP *cpi,
int this_frame_target,
int *frame_under_shoot_limit,
int *frame_over_shoot_limit);
// Picks q and q bounds given the target for bits
-int vp9_rc_pick_q_and_adjust_q_bounds(const VP9_COMP *cpi,
- int *bottom_index,
- int *top_index);
+int vp9_rc_pick_q_and_bounds(const struct VP9_COMP *cpi,
+ int *bottom_index,
+ int *top_index);
// Estimates q to achieve a target bits per frame
-int vp9_rc_regulate_q(const VP9_COMP *cpi, int target_bits_per_frame,
+int vp9_rc_regulate_q(const struct VP9_COMP *cpi, int target_bits_per_frame,
int active_best_quality, int active_worst_quality);
-// Post encode update of the rate control parameters based
-// on bytes used
-void vp9_rc_postencode_update(VP9_COMP *cpi,
- uint64_t bytes_used);
-
-// estimates bits per mb for a given qindex and correction factor
+// Estimates bits per mb for a given qindex and correction factor.
int vp9_rc_bits_per_mb(FRAME_TYPE frame_type, int qindex,
double correction_factor);
-// Post encode update of the rate control parameters for 2-pass
-void vp9_twopass_postencode_update(VP9_COMP *cpi,
- uint64_t bytes_used);
-
-// Decide if we should drop this frame: For 1-pass CBR.
-int vp9_drop_frame(VP9_COMP *cpi);
-
-// Update the buffer level.
-void vp9_update_buffer_level(VP9_COMP *cpi, int encoded_frame_size);
+// Clamping utilities for bitrate targets for iframes and pframes.
+int vp9_rc_clamp_iframe_target_size(const struct VP9_COMP *const cpi,
+ int target);
+int vp9_rc_clamp_pframe_target_size(const struct VP9_COMP *const cpi,
+ int target);
+// Utility to set frame_target into the RATE_CONTROL structure
+// This function is called only from the vp9_rc_get_..._params() functions.
+void vp9_rc_set_frame_target(struct VP9_COMP *cpi, int target);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
#endif // VP9_ENCODER_VP9_RATECTRL_H_
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