110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_
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#define VP9_ENCODER_VP9_SVC_LAYERCONTEXT_H_
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#include "vpx/vpx_encoder.h"
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#include "vp9/encoder/vp9_ratectrl.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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RATE_CONTROL rc;
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int target_bandwidth;
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double framerate;
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int avg_frame_size;
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TWO_PASS twopass;
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vpx_fixed_buf_t rc_twopass_stats_in;
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unsigned int current_video_frame_in_layer;
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int is_key_frame;
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vpx_svc_parameters_t svc_params_received;
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struct lookahead_entry *alt_ref_source;
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int alt_ref_idx;
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int gold_ref_idx;
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int has_alt_frame;
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size_t layer_size;
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} LAYER_CONTEXT;
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typedef struct {
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int spatial_layer_id;
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int temporal_layer_id;
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int number_spatial_layers;
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int number_temporal_layers;
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// Store scaled source frames to be used for temporal filter to generate
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// a alt ref frame.
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YV12_BUFFER_CONFIG scaled_frames[MAX_LAG_BUFFERS];
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// Layer context used for rate control in one pass temporal CBR mode or
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// two pass spatial mode. Defined for temporal or spatial layers for now.
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// Does not support temporal combined with spatial RC.
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LAYER_CONTEXT layer_context[MAX(VPX_TS_MAX_LAYERS, VPX_SS_MAX_LAYERS)];
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} SVC;
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struct VP9_COMP;
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// Initialize layer context data from init_config().
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void vp9_init_layer_context(struct VP9_COMP *const cpi);
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// Update the layer context from a change_config() call.
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void vp9_update_layer_context_change_config(struct VP9_COMP *const cpi,
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const int target_bandwidth);
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// Prior to encoding the frame, update framerate-related quantities
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// for the current temporal layer.
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void vp9_update_temporal_layer_framerate(struct VP9_COMP *const cpi);
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// Update framerate-related quantities for the current spatial layer.
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void vp9_update_spatial_layer_framerate(struct VP9_COMP *const cpi,
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double framerate);
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// Prior to encoding the frame, set the layer context, for the current layer
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// to be encoded, to the cpi struct.
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void vp9_restore_layer_context(struct VP9_COMP *const cpi);
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// Save the layer context after encoding the frame.
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void vp9_save_layer_context(struct VP9_COMP *const cpi);
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// Initialize second pass rc for spatial svc.
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void vp9_init_second_pass_spatial_svc(struct VP9_COMP *cpi);
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// Increment number of video frames in layer
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void vp9_inc_frame_in_layer(SVC *svc);
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// Check if current layer is key frame in spatial upper layer
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int vp9_is_upper_layer_key_frame(const struct VP9_COMP *const cpi);
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// Copy the source image, flags and svc parameters into a new framebuffer
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// with the expected stride/border
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int vp9_svc_lookahead_push(const struct VP9_COMP *const cpi,
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struct lookahead_ctx *ctx, YV12_BUFFER_CONFIG *src,
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int64_t ts_start, int64_t ts_end,
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unsigned int flags);
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// Get the next source buffer to encode
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struct lookahead_entry *vp9_svc_lookahead_pop(struct VP9_COMP *const cpi,
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struct lookahead_ctx *ctx,
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int drain);
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// Get a future source buffer to encode
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struct lookahead_entry *vp9_svc_lookahead_peek(struct VP9_COMP *const cpi,
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struct lookahead_ctx *ctx,
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int index, int copy_params);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP9_ENCODER_VP9_SVC_LAYERCONTEXT_
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