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/*
* Copyright (c) 2014 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_SVC_LAYERCONTEXT_H_
#define VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_
#include "vpx/vpx_encoder.h"
#include "vp9/encoder/vp9_ratectrl.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
RATE_CONTROL rc;
int target_bandwidth;
int spatial_layer_target_bandwidth; // Target for the spatial layer.
double framerate;
int avg_frame_size;
int max_q;
int min_q;
int scaling_factor_num;
int scaling_factor_den;
TWO_PASS twopass;
vpx_fixed_buf_t rc_twopass_stats_in;
unsigned int current_video_frame_in_layer;
int is_key_frame;
int frames_from_key_frame;
FRAME_TYPE last_frame_type;
struct lookahead_entry *alt_ref_source;
int alt_ref_idx;
int gold_ref_idx;
int has_alt_frame;
size_t layer_size;
struct vpx_psnr_pkt psnr_pkt;
} LAYER_CONTEXT;
typedef struct {
int spatial_layer_id;
int temporal_layer_id;
int number_spatial_layers;
int number_temporal_layers;
int spatial_layer_to_encode;
// Workaround for multiple frame contexts
enum {
ENCODED = 0,
ENCODING,
NEED_TO_ENCODE
}encode_empty_frame_state;
struct lookahead_entry empty_frame;
int encode_intra_empty_frame;
// Store scaled source frames to be used for temporal filter to generate
// a alt ref frame.
YV12_BUFFER_CONFIG scaled_frames[MAX_LAG_BUFFERS];
// Layer context used for rate control in one pass temporal CBR mode or
// two pass spatial mode.
LAYER_CONTEXT layer_context[VPX_MAX_LAYERS];
// Indicates what sort of temporal layering is used.
// Currently, this only works for CBR mode.
VP9E_TEMPORAL_LAYERING_MODE temporal_layering_mode;
} SVC;
struct VP9_COMP;
// Initialize layer context data from init_config().
void vp9_init_layer_context(struct VP9_COMP *const cpi);
// Update the layer context from a change_config() call.
void vp9_update_layer_context_change_config(struct VP9_COMP *const cpi,
const int target_bandwidth);
// Prior to encoding the frame, update framerate-related quantities
// for the current temporal layer.
void vp9_update_temporal_layer_framerate(struct VP9_COMP *const cpi);
// Update framerate-related quantities for the current spatial layer.
void vp9_update_spatial_layer_framerate(struct VP9_COMP *const cpi,
double framerate);
// Prior to encoding the frame, set the layer context, for the current layer
// to be encoded, to the cpi struct.
void vp9_restore_layer_context(struct VP9_COMP *const cpi);
// Save the layer context after encoding the frame.
void vp9_save_layer_context(struct VP9_COMP *const cpi);
// Initialize second pass rc for spatial svc.
void vp9_init_second_pass_spatial_svc(struct VP9_COMP *cpi);
// Increment number of video frames in layer
void vp9_inc_frame_in_layer(struct VP9_COMP *const cpi);
// Check if current layer is key frame in spatial upper layer
int vp9_is_upper_layer_key_frame(const struct VP9_COMP *const cpi);
// Get the next source buffer to encode
struct lookahead_entry *vp9_svc_lookahead_pop(struct VP9_COMP *const cpi,
struct lookahead_ctx *ctx,
int drain);
// Start a frame and initialize svc parameters
int vp9_svc_start_frame(struct VP9_COMP *const cpi);
int vp9_one_pass_cbr_svc_start_layer(struct VP9_COMP *const cpi);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VP9_ENCODER_VP9_SVC_LAYERCONTEXT_
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