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