2 * Copyright (c) 2013 The WebM project authors. All Rights Reserved.
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.
12 * SvcContext - input parameters and state to encode a multi-layered
16 #ifndef VPX_SVC_CONTEXT_H_
17 #define VPX_SVC_CONTEXT_H_
20 #include "./vpx_encoder.h"
26 typedef enum SVC_ENCODING_MODE {
27 INTER_LAYER_PREDICTION_I,
28 ALT_INTER_LAYER_PREDICTION_IP,
29 INTER_LAYER_PREDICTION_IP,
33 typedef enum SVC_LOG_LEVEL {
40 // public interface to svc_command options
41 int spatial_layers; // number of layers
42 SVC_ENCODING_MODE encoding_mode; // svc encoding strategy
43 SVC_LOG_LEVEL log_level; // amount of information to display
44 int log_print; // when set, printf log messages instead of returning the
45 // message with svc_get_message
47 // private storage for vpx_svc_encode
53 * options are supplied as a single string separated by spaces
54 * Format: encoding-mode=<i|ip|alt-ip|gf>
55 * layers=<layer_count>
56 * scaling-factors=<n1>/<d1>,<n2>/<d2>,...
57 * quantizers=<q1>,<q2>,...
59 vpx_codec_err_t vpx_svc_set_options(SvcContext *svc_ctx, const char *options);
62 * Set SVC quantizer values
63 * values comma separated, ordered from lowest resolution to highest
64 * e.g., "60,53,39,33,27"
66 vpx_codec_err_t vpx_svc_set_quantizers(SvcContext *svc_ctx,
67 const char *quantizer_values,
68 const int is_for_keyframe);
71 * Set SVC scale factors
72 * values comma separated, ordered from lowest resolution to highest
73 * e.g., "4/16,5/16,7/16,11/16,16/16"
75 vpx_codec_err_t vpx_svc_set_scale_factors(SvcContext *svc_ctx,
76 const char *scale_factors);
79 * initialize SVC encoding
81 vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
82 vpx_codec_iface_t *iface,
83 vpx_codec_enc_cfg_t *cfg);
85 * encode a frame of video with multiple layers
87 vpx_codec_err_t vpx_svc_encode(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
88 struct vpx_image *rawimg, vpx_codec_pts_t pts,
89 int64_t duration, int deadline);
92 * finished with svc encoding, release allocated resources
94 void vpx_svc_release(SvcContext *svc_ctx);
97 * dump accumulated statistics and reset accumulated values
99 const char *vpx_svc_dump_statistics(SvcContext *svc_ctx);
102 * get status message from previous encode
104 const char *vpx_svc_get_message(const SvcContext *svc_ctx);
107 * return size of encoded data to be returned by vpx_svc_get_buffer
109 size_t vpx_svc_get_frame_size(const SvcContext *svc_ctx);
112 * return buffer with encoded data
114 void *vpx_svc_get_buffer(const SvcContext *svc_ctx);
117 * return size of two pass rate control stats data to be returned by
118 * vpx_svc_get_rc_stats_buffer
120 size_t vpx_svc_get_rc_stats_buffer_size(const SvcContext *svc_ctx);
123 * return buffer two pass of rate control stats data
125 char *vpx_svc_get_rc_stats_buffer(const SvcContext *svc_ctx);
128 * return spatial resolution of the specified layer
130 vpx_codec_err_t vpx_svc_get_layer_resolution(const SvcContext *svc_ctx,
133 unsigned int *height);
135 * return number of frames that have been encoded
137 int vpx_svc_get_encode_frame_count(const SvcContext *svc_ctx);
140 * return 1 if last encoded frame was a keyframe
142 int vpx_svc_is_keyframe(const SvcContext *svc_ctx);
145 * force the next frame to be a keyframe
147 void vpx_svc_set_keyframe(SvcContext *svc_ctx);
153 #endif // VPX_SVC_CONTEXT_H_