2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
11 #ifndef VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_
12 #define VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_
14 #include "vpx/vpx_encoder.h"
16 #include "vp9/encoder/vp9_ratectrl.h"
29 int scaling_factor_num;
30 int scaling_factor_den;
32 vpx_fixed_buf_t rc_twopass_stats_in;
33 unsigned int current_video_frame_in_layer;
35 int frames_from_key_frame;
36 FRAME_TYPE last_frame_type;
37 struct lookahead_entry *alt_ref_source;
42 struct vpx_psnr_pkt psnr_pkt;
47 int temporal_layer_id;
48 int number_spatial_layers;
49 int number_temporal_layers;
51 int spatial_layer_to_encode;
53 // Workaround for multiple frame contexts
58 }encode_empty_frame_state;
59 struct lookahead_entry empty_frame;
60 int empty_frame_width;
61 int empty_frame_height;
63 // Store scaled source frames to be used for temporal filter to generate
65 YV12_BUFFER_CONFIG scaled_frames[MAX_LAG_BUFFERS];
67 // Layer context used for rate control in one pass temporal CBR mode or
68 // two pass spatial mode. Defined for temporal or spatial layers for now.
69 // Does not support temporal combined with spatial RC.
70 LAYER_CONTEXT layer_context[MAX(VPX_TS_MAX_LAYERS, VPX_SS_MAX_LAYERS)];
75 // Initialize layer context data from init_config().
76 void vp9_init_layer_context(struct VP9_COMP *const cpi);
78 // Update the layer context from a change_config() call.
79 void vp9_update_layer_context_change_config(struct VP9_COMP *const cpi,
80 const int target_bandwidth);
82 // Prior to encoding the frame, update framerate-related quantities
83 // for the current temporal layer.
84 void vp9_update_temporal_layer_framerate(struct VP9_COMP *const cpi);
86 // Update framerate-related quantities for the current spatial layer.
87 void vp9_update_spatial_layer_framerate(struct VP9_COMP *const cpi,
90 // Prior to encoding the frame, set the layer context, for the current layer
91 // to be encoded, to the cpi struct.
92 void vp9_restore_layer_context(struct VP9_COMP *const cpi);
94 // Save the layer context after encoding the frame.
95 void vp9_save_layer_context(struct VP9_COMP *const cpi);
97 // Initialize second pass rc for spatial svc.
98 void vp9_init_second_pass_spatial_svc(struct VP9_COMP *cpi);
100 // Increment number of video frames in layer
101 void vp9_inc_frame_in_layer(struct VP9_COMP *const cpi);
103 // Check if current layer is key frame in spatial upper layer
104 int vp9_is_upper_layer_key_frame(const struct VP9_COMP *const cpi);
106 // Get the next source buffer to encode
107 struct lookahead_entry *vp9_svc_lookahead_pop(struct VP9_COMP *const cpi,
108 struct lookahead_ctx *ctx,
111 // Start a frame and initialize svc parameters
112 int vp9_svc_start_frame(struct VP9_COMP *const cpi);
118 #endif // VP9_ENCODER_VP9_SVC_LAYERCONTEXT_