1 /* 2 * Copyright (c) 2013 The WebM project authors. All Rights Reserved. 3 * 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. 9 */ 10 11 /** 12 * SvcContext - input parameters and state to encode a multi-layered 13 * spatial SVC frame 14 */ 15 16 #ifndef VPX_SVC_CONTEXT_H_ 17 #define VPX_SVC_CONTEXT_H_ 18 19 #include "./vp8cx.h" 20 #include "./vpx_encoder.h" 21 22 #ifdef __cplusplus 23 extern "C" { 24 #endif 25 26 typedef enum SVC_LOG_LEVEL { 27 SVC_LOG_ERROR, 28 SVC_LOG_INFO, 29 SVC_LOG_DEBUG 30 } SVC_LOG_LEVEL; 31 32 typedef struct { 33 // public interface to svc_command options 34 int spatial_layers; // number of spatial layers 35 int temporal_layers; // number of temporal layers 36 int temporal_layering_mode; 37 SVC_LOG_LEVEL log_level; // amount of information to display 38 int log_print; // when set, printf log messages instead of returning the 39 // message with svc_get_message 40 int output_rc_stat; // for outputting rc stats 41 int speed; // speed setting for codec 42 int threads; 43 int aqmode; // turns on aq-mode=3 (cyclic_refresh): 0=off, 1=on. 44 // private storage for vpx_svc_encode 45 void *internal; 46 } SvcContext; 47 48 #define OPTION_BUFFER_SIZE 1024 49 #define COMPONENTS 4 // psnr & sse statistics maintained for total, y, u, v 50 51 typedef struct SvcInternal { 52 char options[OPTION_BUFFER_SIZE]; // set by vpx_svc_set_options 53 54 // values extracted from option, quantizers 55 vpx_svc_extra_cfg_t svc_params; 56 int enable_auto_alt_ref[VPX_SS_MAX_LAYERS]; 57 int bitrates[VPX_MAX_LAYERS]; 58 59 // accumulated statistics 60 double psnr_sum[VPX_SS_MAX_LAYERS][COMPONENTS]; // total/Y/U/V 61 uint64_t sse_sum[VPX_SS_MAX_LAYERS][COMPONENTS]; 62 uint32_t bytes_sum[VPX_SS_MAX_LAYERS]; 63 64 // codec encoding values 65 int width; // width of highest layer 66 int height; // height of highest layer 67 int kf_dist; // distance between keyframes 68 69 // state variables 70 int psnr_pkt_received; 71 int layer; 72 int use_multiple_frame_contexts; 73 74 char message_buffer[2048]; 75 vpx_codec_ctx_t *codec_ctx; 76 } SvcInternal_t; 77 78 /** 79 * Set SVC options 80 * options are supplied as a single string separated by spaces 81 * Format: encoding-mode=<i|ip|alt-ip|gf> 82 * layers=<layer_count> 83 * scaling-factors=<n1>/<d1>,<n2>/<d2>,... 84 * quantizers=<q1>,<q2>,... 85 */ 86 vpx_codec_err_t vpx_svc_set_options(SvcContext *svc_ctx, const char *options); 87 88 /** 89 * initialize SVC encoding 90 */ 91 vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx, 92 vpx_codec_iface_t *iface, 93 vpx_codec_enc_cfg_t *cfg); 94 /** 95 * encode a frame of video with multiple layers 96 */ 97 vpx_codec_err_t vpx_svc_encode(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx, 98 struct vpx_image *rawimg, vpx_codec_pts_t pts, 99 int64_t duration, int deadline); 100 101 /** 102 * finished with svc encoding, release allocated resources 103 */ 104 void vpx_svc_release(SvcContext *svc_ctx); 105 106 /** 107 * dump accumulated statistics and reset accumulated values 108 */ 109 const char *vpx_svc_dump_statistics(SvcContext *svc_ctx); 110 111 /** 112 * get status message from previous encode 113 */ 114 const char *vpx_svc_get_message(const SvcContext *svc_ctx); 115 116 #ifdef __cplusplus 117 } // extern "C" 118 #endif 119 120 #endif // VPX_SVC_CONTEXT_H_ 121