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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 "vpx/vp8cx.h" #include "vpx/vpx_encoder.h" #ifdef __cplusplus extern "C" { #endif typedef enum SVC_ENCODING_MODE { INTER_LAYER_PREDICTION_I, ALT_INTER_LAYER_PREDICTION_IP, INTER_LAYER_PREDICTION_IP, USE_GOLDEN_FRAME } SVC_ENCODING_MODE; 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 layers int first_frame_full_size; // set to one to force first frame full size SVC_ENCODING_MODE encoding_mode; // svc encoding strategy 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 // private storage for vpx_svc_encode void *internal; } SvcContext; /** * 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); /** * Set SVC quantizer values * values comma separated, ordered from lowest resolution to highest * e.g., "60,53,39,33,27" */ vpx_codec_err_t vpx_svc_set_quantizers(SvcContext *svc_ctx, const char *quantizer_values); /** * Set SVC scale factors * values comma separated, ordered from lowest resolution to highest * e.g., "4/16,5/16,7/16,11/16,16/16" */ vpx_codec_err_t vpx_svc_set_scale_factors(SvcContext *svc_ctx, const char *scale_factors); /** * 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); /** * return size of encoded data to be returned by vpx_svc_get_buffer */ size_t vpx_svc_get_frame_size(const SvcContext *svc_ctx); /** * return buffer with encoded data */ void *vpx_svc_get_buffer(const SvcContext *svc_ctx); /** * return spatial resolution of the specified layer */ vpx_codec_err_t vpx_svc_get_layer_resolution(const SvcContext *svc_ctx, int layer, unsigned int *width, unsigned int *height); /** * return number of frames that have been encoded */ int vpx_svc_get_encode_frame_count(const SvcContext *svc_ctx); /** * return 1 if last encoded frame was a keyframe */ int vpx_svc_is_keyframe(const SvcContext *svc_ctx); /** * force the next frame to be a keyframe */ void vpx_svc_set_keyframe(SvcContext *svc_ctx); #ifdef __cplusplus } // extern "C" #endif #endif /* VPX_SVC_CONTEXT_H_ */