DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (31ec81b5d7bb)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142
/*
 *  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_ */