libvpx: Pull from upstream

source/libvpx/vpx/svc_context.h

Index: source/libvpx/vpx/svc_context.h
===================================================================
--- source/libvpx/vpx/svc_context.h	(revision 0)
+++ source/libvpx/vpx/svc_context.h	(revision 0)
@@ -0,0 +1,141 @@
+/*
+ *  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
+  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_ */