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Jim Bankoski authored
Tests q0 ( lossless), very high bitrate and low bitrates at cpu speed 0, 1 and 2. Change-Id: I0c5cdca00acd8d01e7b13f124b3b08d4b1ae9f6d
b0520b61
vp9_ratectrl.h 5.56 KiB
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */#ifndef VP9_ENCODER_VP9_RATECTRL_H_#define VP9_ENCODER_VP9_RATECTRL_H_#include "vpx/vpx_integer.h"#include "vp9/common/vp9_blockd.h"#ifdef __cplusplusextern "C" {#endif#define FRAME_OVERHEAD_BITS 200typedef 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; int frames_since_golden; int frames_till_gf_update_due; int max_gf_interval; int static_scene_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. 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; int64_t buffer_level; int64_t bits_off_target; int decimation_factor; int decimation_count;7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
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);
double vp9_convert_qindex_to_q(int qindex);
void vp9_rc_init_minq_luts();
// 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,
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int *frame_over_shoot_limit);
// Picks q and q bounds given the target for bits
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);
// 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);
// 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_