diff options
Diffstat (limited to 'vp9/encoder/vp9_ratectrl.h')
| -rw-r--r-- | vp9/encoder/vp9_ratectrl.h | 111 |
1 files changed, 69 insertions, 42 deletions
diff --git a/vp9/encoder/vp9_ratectrl.h b/vp9/encoder/vp9_ratectrl.h index eba4b7a92..5dbc7d138 100644 --- a/vp9/encoder/vp9_ratectrl.h +++ b/vp9/encoder/vp9_ratectrl.h @@ -34,19 +34,18 @@ typedef struct { 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 per_frame_bandwidth; // Current section per frame bandwidth target + int frames_since_golden; + int frames_till_gf_update_due; + int max_gf_interval; + int baseline_gf_interval; + int frames_to_key; + int frames_since_key; + int this_key_frame_forced; + int next_key_frame_forced; + int source_alt_ref_pending; + int source_alt_ref_active; + 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. @@ -58,8 +57,8 @@ typedef struct { double tot_q; double avg_q; - int buffer_level; - int bits_off_target; + int64_t buffer_level; + int64_t bits_off_target; int decimation_factor; int decimation_count; @@ -74,7 +73,6 @@ typedef struct { int total_target_vs_actual; // debug stats int worst_quality; - int active_worst_quality; int best_quality; // int active_best_quality; } RATE_CONTROL; @@ -89,50 +87,79 @@ 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(struct 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(struct 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); +// 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 struct 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 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(struct VP9_COMP *cpi, - uint64_t bytes_used); -// for dropped frames -void vp9_rc_postencode_update_drop_frame(struct VP9_COMP *cpi); - -// 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(struct VP9_COMP *cpi, - uint64_t bytes_used); - -// Decide if we should drop this frame: For 1-pass CBR. -int vp9_drop_frame(struct VP9_COMP *cpi); - -// Update the buffer level. -void vp9_update_buffer_level(struct 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" |