ref: 3628975a15dbb02f1b61edc49b831c67ace278b4
dir: /vpx/svc_context.h/
/* * Copyright (c) 2013 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. */ /** * SvcContext - input parameters and state to encode a multi-layered * spatial SVC frame */ #ifndef VPX_SVC_CONTEXT_H_ #define VPX_SVC_CONTEXT_H_ #include "./vp8cx.h" #include "./vpx_encoder.h" #ifdef __cplusplus extern "C" { #endif typedef enum SVC_LOG_LEVEL { SVC_LOG_ERROR, SVC_LOG_INFO, SVC_LOG_DEBUG } SVC_LOG_LEVEL; typedef struct { // public interface to svc_command options int spatial_layers; // number of spatial layers int temporal_layers; // number of temporal layers int temporal_layering_mode; SVC_LOG_LEVEL log_level; // amount of information to display int log_print; // when set, printf log messages instead of returning the // message with svc_get_message int output_rc_stat; // for outputting rc stats int speed; // speed setting for codec int threads; int aqmode; // turns on aq-mode=3 (cyclic_refresh): 0=off, 1=on. // private storage for vpx_svc_encode void *internal; } SvcContext; #define OPTION_BUFFER_SIZE 1024 #define COMPONENTS 4 // psnr & sse statistics maintained for total, y, u, v typedef struct SvcInternal { char options[OPTION_BUFFER_SIZE]; // set by vpx_svc_set_options // values extracted from option, quantizers vpx_svc_extra_cfg_t svc_params; int enable_auto_alt_ref[VPX_SS_MAX_LAYERS]; int bitrates[VPX_MAX_LAYERS]; // accumulated statistics double psnr_sum[VPX_SS_MAX_LAYERS][COMPONENTS]; // total/Y/U/V uint64_t sse_sum[VPX_SS_MAX_LAYERS][COMPONENTS]; uint32_t bytes_sum[VPX_SS_MAX_LAYERS]; // codec encoding values int width; // width of highest layer int height; // height of highest layer int kf_dist; // distance between keyframes // state variables int psnr_pkt_received; int layer; int use_multiple_frame_contexts; char message_buffer[2048]; vpx_codec_ctx_t *codec_ctx; } SvcInternal_t; /** * Set SVC options * options are supplied as a single string separated by spaces * Format: encoding-mode=<i|ip|alt-ip|gf> * layers=<layer_count> * scaling-factors=<n1>/<d1>,<n2>/<d2>,... * quantizers=<q1>,<q2>,... */ vpx_codec_err_t vpx_svc_set_options(SvcContext *svc_ctx, const char *options); /** * initialize SVC encoding */ vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx, vpx_codec_iface_t *iface, vpx_codec_enc_cfg_t *cfg); /** * encode a frame of video with multiple layers */ vpx_codec_err_t vpx_svc_encode(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx, struct vpx_image *rawimg, vpx_codec_pts_t pts, int64_t duration, int deadline); /** * finished with svc encoding, release allocated resources */ void vpx_svc_release(SvcContext *svc_ctx); /** * dump accumulated statistics and reset accumulated values */ const char *vpx_svc_dump_statistics(SvcContext *svc_ctx); /** * get status message from previous encode */ const char *vpx_svc_get_message(const SvcContext *svc_ctx); #ifdef __cplusplus } // extern "C" #endif #endif // VPX_SVC_CONTEXT_H_