shithub: libvpx

Download patch

ref: 64d94b4aa67a700393c26253d34760d81542487f
parent: fa57135b2c773c47ef8fa09beea29c81e9548d5e
parent: cd74a901a757a3660887e74d6581fa69277cb9a6
author: James Zern <jzern@google.com>
date: Tue Oct 22 08:47:22 EDT 2013

Merge "Revert "Merge "SVC improvements"""

--- a/libs.mk
+++ b/libs.mk
@@ -122,7 +122,6 @@
   CODEC_EXPORTS-yes += $(addprefix $(VP9_PREFIX),$(VP9_CX_EXPORTS))
   CODEC_SRCS-yes += $(VP9_PREFIX)vp9cx.mk vpx/vp8.h vpx/vp8cx.h
   INSTALL-LIBS-yes += include/vpx/vp8.h include/vpx/vp8cx.h
-  INSTALL-LIBS-yes += include/vpx/svc_context.h
   INSTALL_MAPS += include/vpx/% $(SRC_PATH_BARE)/$(VP9_PREFIX)/%
   CODEC_DOC_SRCS += vpx/vp8.h vpx/vp8cx.h
   CODEC_DOC_SECTIONS += vp9 vp9_encoder
--- a/test/svc_test.cc
+++ /dev/null
@@ -1,190 +1,0 @@
-#include <string>
-#include "third_party/googletest/src/include/gtest/gtest.h"
-#include "test/i420_video_source.h"
-#include "test/decode_test_driver.h"
-#include "vpx/vpx_encoder.h"
-#include "vpx/vp8cx.h"
-#include "test/codec_factory.h"
-
-extern "C" {
-#include "vpx/svc_context.h"
-}
-
-namespace {
-
-using libvpx_test::CodecFactory;
-using libvpx_test::VP9CodecFactory;
-using libvpx_test::Decoder;
-
-class SvcTest : public ::testing::Test {
- protected:
-  SvcTest()
-      : codec_iface_(0),
-        test_file_name("hantro_collage_w352h288.yuv"),
-        decoder_(0) {}
-
-  virtual void SetUp() {
-    memset(&svc_, 0, sizeof(svc_));
-    svc_.first_frame_full_size = 1;
-    svc_.encoding_mode = INTER_LAYER_PREDICTION_IP;
-    svc_.log_level = SVC_LOG_DEBUG;
-    svc_.log_print = 1;
-    svc_.gop_size = 100;
-
-    codec_iface_ = vpx_codec_vp9_cx();
-    vpx_codec_err_t res =
-        vpx_codec_enc_config_default(codec_iface_, &codec_enc_, 0);
-    EXPECT_EQ(res, VPX_CODEC_OK);
-
-    codec_enc_.g_w = kWidth;
-    codec_enc_.g_h = kHeight;
-    codec_enc_.g_timebase.num = 1;
-    codec_enc_.g_timebase.den = 60;
-
-    vpx_codec_dec_cfg_t dec_cfg = {0};
-    VP9CodecFactory codec_factory;
-    decoder_ = codec_factory.CreateDecoder(dec_cfg, 0);
-  }
-
-  SvcContext svc_;
-  vpx_codec_ctx_t codec_;
-  struct vpx_codec_enc_cfg codec_enc_;
-  vpx_codec_iface_t* codec_iface_;
-  std::string test_file_name;
-  enum {
-    kWidth = 352,
-    kHeight = 288,
-  };
-
-  Decoder* decoder_;
-};
-
-TEST_F(SvcTest, SvcInit) {
-  svc_.spatial_layers = 0;  // not enough layers
-  vpx_codec_err_t res = vpx_svc_init(&svc_, &codec_, codec_iface_, &codec_enc_);
-  EXPECT_EQ(res, VPX_CODEC_INVALID_PARAM);
-
-  svc_.spatial_layers = 6;  // too many layers
-  res = vpx_svc_init(&svc_, &codec_, codec_iface_, &codec_enc_);
-  EXPECT_EQ(res, VPX_CODEC_INVALID_PARAM);
-
-  svc_.spatial_layers = 2;
-  svc_.scale_factors = "4/16,16*16";  // invalid scale values
-  res = vpx_svc_init(&svc_, &codec_, codec_iface_, &codec_enc_);
-  EXPECT_EQ(res, VPX_CODEC_INVALID_PARAM);
-
-  svc_.scale_factors = "4/16,16/16";  // valid scale values
-
-  res = vpx_svc_init(&svc_, &codec_, codec_iface_, &codec_enc_);
-  EXPECT_EQ(res, VPX_CODEC_OK);
-}
-
-// test that decoder can handle an svc frame as the first frame in a sequence
-// this test is disabled since it with the deco
-TEST_F(SvcTest, DISABLED_FirstFrameHasLayers) {
-  svc_.first_frame_full_size = 0;
-  svc_.spatial_layers = 2;
-  svc_.scale_factors = "4/16,16/16";
-  svc_.quantizer_values = "40,30";
-
-  vpx_codec_err_t res =
-      vpx_svc_init(&svc_, &codec_, vpx_codec_vp9_cx(), &codec_enc_);
-  EXPECT_EQ(res, VPX_CODEC_OK);
-
-  libvpx_test::I420VideoSource video(test_file_name, kWidth, kHeight,
-                                     codec_enc_.g_timebase.den,
-                                     codec_enc_.g_timebase.num, 0, 30);
-  video.Begin();
-
-  res = vpx_svc_encode(&svc_, &codec_, video.img(), video.pts(),
-                       video.duration(), VPX_DL_REALTIME);
-  EXPECT_EQ(res, VPX_CODEC_OK);
-
-  vpx_codec_err_t res_dec = decoder_->DecodeFrame(
-      (const uint8_t*)svc_get_buffer(&svc_), svc_get_frame_size(&svc_));
-
-  // this test fails with a decoder error
-  ASSERT_EQ(VPX_CODEC_OK, res_dec) << decoder_->DecodeError();
-}
-
-TEST_F(SvcTest, EncodeThreeFrames) {
-  svc_.first_frame_full_size = 1;
-  svc_.spatial_layers = 2;
-  svc_.scale_factors = "4/16,16/16";
-  svc_.quantizer_values = "40,30";
-
-  vpx_codec_err_t res =
-      vpx_svc_init(&svc_, &codec_, vpx_codec_vp9_cx(), &codec_enc_);
-  ASSERT_EQ(res, VPX_CODEC_OK);
-
-  libvpx_test::I420VideoSource video(test_file_name, kWidth, kHeight,
-                                     codec_enc_.g_timebase.den,
-                                     codec_enc_.g_timebase.num, 0, 30);
-  // FRAME 1
-  video.Begin();
-  // this frame is full size, with only one layer
-  res = vpx_svc_encode(&svc_, &codec_, video.img(), video.pts(),
-                       video.duration(), VPX_DL_REALTIME);
-  ASSERT_EQ(res, VPX_CODEC_OK);
-  EXPECT_EQ(1, svc_is_keyframe(&svc_));
-
-  vpx_codec_err_t res_dec = decoder_->DecodeFrame(
-      (const uint8_t*)svc_get_buffer(&svc_), svc_get_frame_size(&svc_));
-  ASSERT_EQ(VPX_CODEC_OK, res_dec) << decoder_->DecodeError();
-
-  // FRAME 2
-  video.Next();
-  // this is an I-frame
-  res = vpx_svc_encode(&svc_, &codec_, video.img(), video.pts(),
-                       video.duration(), VPX_DL_REALTIME);
-  ASSERT_EQ(res, VPX_CODEC_OK);
-  EXPECT_EQ(1, svc_is_keyframe(&svc_));
-
-  res_dec = decoder_->DecodeFrame((const uint8_t*)svc_get_buffer(&svc_),
-                                  svc_get_frame_size(&svc_));
-  ASSERT_EQ(VPX_CODEC_OK, res_dec) << decoder_->DecodeError();
-
-  // FRAME 2
-  video.Next();
-  // this is a P-frame
-  res = vpx_svc_encode(&svc_, &codec_, video.img(), video.pts(),
-                       video.duration(), VPX_DL_REALTIME);
-  ASSERT_EQ(res, VPX_CODEC_OK);
-  EXPECT_EQ(0, svc_is_keyframe(&svc_));
-
-  res_dec = decoder_->DecodeFrame((const uint8_t*)svc_get_buffer(&svc_),
-                                  svc_get_frame_size(&svc_));
-  ASSERT_EQ(VPX_CODEC_OK, res_dec) << decoder_->DecodeError();
-}
-
-TEST_F(SvcTest, GetLayerResolution) {
-  unsigned int layer_width, layer_height;
-
-  svc_.first_frame_full_size = 0;
-  svc_.spatial_layers = 2;
-  svc_.scale_factors = "4/16,8/16";
-  svc_.quantizer_values = "40,30";
-
-  vpx_codec_err_t res =
-      vpx_svc_init(&svc_, &codec_, vpx_codec_vp9_cx(), &codec_enc_);
-  EXPECT_EQ(res, VPX_CODEC_OK);
-
-  // ensure that requested layer is a valid layer
-  res = svc_get_layer_resolution(&svc_, svc_.spatial_layers, &layer_width,
-                                 &layer_height);
-  EXPECT_EQ(res, VPX_CODEC_INVALID_PARAM);
-
-  res = svc_get_layer_resolution(&svc_, 0, &layer_width,
-                                 &layer_height);
-  EXPECT_EQ(res, VPX_CODEC_OK);
-  EXPECT_EQ((unsigned int)(kWidth * 4 / 16), layer_width);
-  EXPECT_EQ((unsigned int)(kHeight * 4 / 16), layer_height);
-
-  res = svc_get_layer_resolution(&svc_, 1, &layer_width,
-                                 &layer_height);
-  EXPECT_EQ(res, VPX_CODEC_OK);
-  EXPECT_EQ((unsigned int)(kWidth * 8 / 16), layer_width);
-  EXPECT_EQ((unsigned int)(kHeight * 8 / 16), layer_height);
-}
-
-}  // namespace
--- a/test/test.mk
+++ b/test/test.mk
@@ -96,7 +96,6 @@
 LIBVPX_TEST_SRCS-$(CONFIG_VP9_ENCODER) += dct16x16_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_VP9_ENCODER) += variance_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_VP9_ENCODER) += dct32x32_test.cc
-LIBVPX_TEST_SRCS-$(CONFIG_VP9_ENCODER) += svc_test.cc
 
 endif # VP9
 
--- a/vp9/common/vp9_onyx.h
+++ b/vp9/common/vp9_onyx.h
@@ -221,6 +221,8 @@
   int vp9_set_size_literal(VP9_PTR comp, unsigned int width,
                            unsigned int height);
 
+  int vp9_switch_layer(VP9_PTR comp, int layer);
+
   void vp9_set_svc(VP9_PTR comp, int use_svc);
 
   int vp9_get_quantizer(VP9_PTR c);
--- a/vp9/encoder/vp9_onyx_if.c
+++ b/vp9/encoder/vp9_onyx_if.c
@@ -4226,9 +4226,37 @@
   return 0;
 }
 
+int vp9_switch_layer(VP9_PTR comp, int layer) {
+  VP9_COMP *cpi = (VP9_COMP *)comp;
+
+  if (cpi->use_svc) {
+    cpi->current_layer = layer;
+
+    // Use buffer i for layer i LST
+    cpi->lst_fb_idx = layer;
+
+    // Use buffer i-1 for layer i Alt (Inter-layer prediction)
+    if (layer != 0) cpi->alt_fb_idx = layer - 1;
+
+    // Use the rest for Golden
+    if (layer < 2 * cpi->number_spatial_layers - NUM_REF_FRAMES)
+      cpi->gld_fb_idx = cpi->lst_fb_idx;
+    else
+      cpi->gld_fb_idx = 2 * cpi->number_spatial_layers - 1 - layer;
+
+    printf("Switching to layer %d:\n", layer);
+    printf("Using references: LST/GLD/ALT [%d|%d|%d]\n", cpi->lst_fb_idx,
+           cpi->gld_fb_idx, cpi->alt_fb_idx);
+  } else {
+    printf("Switching layer not supported. Enable SVC first \n");
+  }
+  return 0;
+}
+
 void vp9_set_svc(VP9_PTR comp, int use_svc) {
   VP9_COMP *cpi = (VP9_COMP *)comp;
   cpi->use_svc = use_svc;
+  if (cpi->use_svc) printf("Enabled SVC encoder \n");
   return;
 }
 
--- a/vp9/vp9_cx_iface.c
+++ b/vp9/vp9_cx_iface.c
@@ -442,6 +442,8 @@
       MAP(VP8E_SET_ARNR_TYPE,               xcfg.arnr_type);
       MAP(VP8E_SET_TUNING,                  xcfg.tuning);
       MAP(VP8E_SET_CQ_LEVEL,                xcfg.cq_level);
+      MAP(VP9E_SET_MAX_Q,                   ctx->cfg.rc_max_quantizer);
+      MAP(VP9E_SET_MIN_Q,                   ctx->cfg.rc_min_quantizer);
       MAP(VP8E_SET_MAX_INTRA_BITRATE_PCT,   xcfg.rc_max_intra_bitrate_pct);
       MAP(VP9E_SET_LOSSLESS,                xcfg.lossless);
       MAP(VP9E_SET_FRAME_PARALLEL_DECODING, xcfg.frame_parallel_decoding_mode);
@@ -1027,40 +1029,66 @@
   }
 }
 
-static vpx_codec_err_t vp9e_set_svc(vpx_codec_alg_priv_t *ctx, int ctr_id,
-                                    va_list args) {
-  int data = va_arg(args, int);
-  vp9_set_svc(ctx->cpi, data);
-  return VPX_CODEC_OK;
+static vpx_codec_err_t vp9e_set_width(vpx_codec_alg_priv_t *ctx, int ctr_id,
+                                      va_list args) {
+  unsigned int *data = va_arg(args, unsigned int *);
+  if (data) {
+    int res;
+    res = vp9_set_size_literal(ctx->cpi, *data, 0);
+    if (!res) {
+      return VPX_CODEC_OK;
+    } else {
+      return VPX_CODEC_INVALID_PARAM;
+    }
+  } else {
+    return VPX_CODEC_INVALID_PARAM;
+  }
 }
 
-static vpx_codec_err_t vp9e_set_svc_parameters(vpx_codec_alg_priv_t *ctx,
-                                               int ctr_id, va_list args) {
-  vpx_svc_parameters_t *data = va_arg(args, vpx_svc_parameters_t *);
-  VP9_COMP *cpi = (VP9_COMP *)ctx->cpi;
-  vpx_svc_parameters_t params;
+static vpx_codec_err_t vp9e_set_height(vpx_codec_alg_priv_t *ctx,
+                                       int ctr_id,
+                                       va_list args) {
+  unsigned int *data =  va_arg(args, unsigned int *);
 
-  if (!data) {
+  if (data) {
+    int res;
+    res = vp9_set_size_literal(ctx->cpi, 0, *data);
+
+    if (!res) {
+      return VPX_CODEC_OK;
+    } else {
+      return VPX_CODEC_INVALID_PARAM;
+    }
+  } else {
     return VPX_CODEC_INVALID_PARAM;
   }
+}
 
-  params = *(vpx_svc_parameters_t *)data;
+static vpx_codec_err_t vp9e_set_layer(vpx_codec_alg_priv_t *ctx,
+                                      int ctr_id,
+                                      va_list args) {
+  unsigned int *data =  va_arg(args, unsigned int *);
 
-  cpi->current_layer = params.layer;
-  cpi->lst_fb_idx = params.lst_fb_idx;
-  cpi->gld_fb_idx = params.gld_fb_idx;
-  cpi->alt_fb_idx = params.alt_fb_idx;
+  if (data) {
+    int res;
+    res = 0;
 
-  if (vp9_set_size_literal(ctx->cpi, params.width, params.height) != 0) {
+    res = vp9_switch_layer(ctx->cpi, *data);
+
+    if (!res) {
+      return VPX_CODEC_OK;
+    } else {
+      return VPX_CODEC_INVALID_PARAM;
+    }
+  } else {
     return VPX_CODEC_INVALID_PARAM;
   }
+}
 
-  ctx->cfg.rc_max_quantizer = params.max_quantizer;
-  ctx->cfg.rc_min_quantizer = params.min_quantizer;
-
-  set_vp9e_config(&ctx->oxcf, ctx->cfg, ctx->vp8_cfg);
-  vp9_change_config(ctx->cpi, &ctx->oxcf);
-
+static vpx_codec_err_t vp9e_set_svc(vpx_codec_alg_priv_t *ctx, int ctr_id,
+                                    va_list args) {
+  int data = va_arg(args, int);
+  vp9_set_svc(ctx->cpi, data);
   return VPX_CODEC_OK;
 }
 
@@ -1088,12 +1116,16 @@
   {VP8E_SET_ARNR_TYPE,                set_param},
   {VP8E_SET_TUNING,                   set_param},
   {VP8E_SET_CQ_LEVEL,                 set_param},
+  {VP9E_SET_MAX_Q,                    set_param},
+  {VP9E_SET_MIN_Q,                    set_param},
   {VP8E_SET_MAX_INTRA_BITRATE_PCT,    set_param},
   {VP9E_SET_LOSSLESS,                 set_param},
   {VP9E_SET_FRAME_PARALLEL_DECODING,  set_param},
   {VP9_GET_REFERENCE,                 get_reference},
+  {VP9E_SET_WIDTH,                    vp9e_set_width},
+  {VP9E_SET_HEIGHT,                   vp9e_set_height},
+  {VP9E_SET_LAYER,                    vp9e_set_layer},
   {VP9E_SET_SVC,                      vp9e_set_svc},
-  {VP9E_SET_SVC_PARAMETERS,           vp9e_set_svc_parameters},
   { -1, NULL},
 };
 
--- a/vp9_spatial_scalable_encoder.c
+++ b/vp9_spatial_scalable_encoder.c
@@ -23,22 +23,24 @@
 #define VPX_CODEC_DISABLE_COMPAT 1
 #include "vpx/vpx_encoder.h"
 #include "vpx/vp8cx.h"
-#include "vpx/svc_context.h"
-
 #define interface (vpx_codec_vp9_cx())
 #define fourcc 0x30395056
 #define IVF_FILE_HDR_SZ (32)
 #define IVF_FRAME_HDR_SZ (12)
+#define NUM_BUFFERS 8
 
 char *input_filename;
 char *output_filename;
 unsigned int number_frames_to_code = 60 * 60;
 unsigned int number_frames_to_skip = 0;
-unsigned int gop_size = 100;
+unsigned int number_spatial_layers = 5;
+unsigned int key_period = 100;
 
-char *scaling_factor;
-char *quantizer;
-SVC_ENCODING_MODE encoding_mode = INTER_LAYER_PREDICTION_IP;
+typedef enum ENCODING_MODE {
+  INTER_LAYER_PREDICTION_I,
+  INTER_LAYER_PREDICTION_IP,
+  USE_GOLDEN_FRAME
+} ENCODING_MODE;
 
 static void mem_put_le16(char *mem, unsigned int val) {
   mem[0] = val;
@@ -55,10 +57,7 @@
 static void usage(char *program_name) {
   printf(
       "Usage: %s [-f frames] [-s skip_frames] [-w width] [-h height] \n\t"
-      "[-n rate_num] [-d rate_den] [-b bitrate] [-l layers] [-g gop_size] \n\t"
-      "[-z dummy_frame (default 1) \n\t"
-      "[-q quantizer (lowest to highest)] \n\t"
-      "[-r 1/16th scale factor (lowest to highest layer)] "
+      "[-n rate_num] [-d rate_den] [-b bitrate] [-l layers] "
       "<input_filename> <output_filename>\n",
       basename(program_name));
   exit(EXIT_FAILURE);
@@ -84,74 +83,56 @@
 static int read_frame(FILE *f, vpx_image_t *img) {
   size_t nbytes, to_read;
   int res = 1;
-  int plane;
 
-  for (plane = 0; plane < 3; plane++) {
-    unsigned char *ptr;
-    int w = (plane ? (1 + img->d_w) / 2 : img->d_w);
-    int h = (plane ? (1 + img->d_h) / 2 : img->d_h);
-    int r;
-
-    switch (plane) {
-      case 1:
-        ptr = img->planes[VPX_PLANE_U];
-        break;
-      case 2:
-        ptr = img->planes[VPX_PLANE_V];
-        break;
-      default:
-        ptr = img->planes[plane];
-    }
-    for (r = 0; r < h; r++) {
-      to_read = w;
-
-      nbytes = fread(ptr, 1, to_read, f);
-      if (nbytes != to_read) {
-        res = 0;
-        if (nbytes > 0)
-          printf("Warning: Read partial frame. Check your width & height!\n");
-        break;
-      }
-      ptr += img->stride[plane];
-    }
-    if (!res) break;
+  to_read = img->w * img->h * 3 / 2;
+  nbytes = fread(img->planes[0], 1, to_read, f);
+  if (nbytes != to_read) {
+    res = 0;
+    if (nbytes > 0)
+      printf("Warning: Read partial frame. Check your width & height!\n");
   }
   return res;
 }
 
-static int create_dummy_frame(vpx_image_t *img) {
-  size_t buf_size;
-  buf_size = img->w * img->h * 3 / 2;
-  memset(img->planes[0], 129, buf_size);
+static int read_dummy_frame(vpx_image_t *img) {
+  size_t to_read;
+
+  to_read = img->w * img->h * 3 / 2;
+  memset(img->planes[0], 129, to_read);
   return 1;
 }
 
-static void write_ivf_file_header(FILE *outfile, unsigned int width,
-                                  unsigned int height, int timebase_num,
-                                  int timebase_den, int frame_cnt) {
+static void write_ivf_file_header(FILE *outfile, const vpx_codec_enc_cfg_t *cfg,
+                                  int frame_cnt) {
   char header[32];
 
+  if (cfg->g_pass != VPX_RC_ONE_PASS && cfg->g_pass != VPX_RC_LAST_PASS) return;
   header[0] = 'D';
   header[1] = 'K';
   header[2] = 'I';
   header[3] = 'F';
-  mem_put_le16(header + 4, 0);             /* version */
-  mem_put_le16(header + 6, 32);            /* headersize */
-  mem_put_le32(header + 8, fourcc);        /* headersize */
-  mem_put_le16(header + 12, width);        /* width */
-  mem_put_le16(header + 14, height);       /* height */
-  mem_put_le32(header + 16, timebase_den); /* rate */
-  mem_put_le32(header + 20, timebase_num); /* scale */
-  mem_put_le32(header + 24, frame_cnt);    /* length */
-  mem_put_le32(header + 28, 0);            /* unused */
+  mem_put_le16(header + 4, 0);                    /* version */
+  mem_put_le16(header + 6, 32);                   /* headersize */
+  mem_put_le32(header + 8, fourcc);               /* headersize */
+  mem_put_le16(header + 12, cfg->g_w);            /* width */
+  mem_put_le16(header + 14, cfg->g_h);            /* height */
+  mem_put_le32(header + 16, cfg->g_timebase.den); /* rate */
+  mem_put_le32(header + 20, cfg->g_timebase.num); /* scale */
+  mem_put_le32(header + 24, frame_cnt);           /* length */
+  mem_put_le32(header + 28, 0);                   /* unused */
 
   (void)fwrite(header, 1, 32, outfile);
 }
 
-static void write_ivf_frame_header(FILE *outfile, vpx_codec_pts_t pts,
-                                   size_t sz) {
+static void write_ivf_frame_header(FILE *outfile,
+                                   const vpx_codec_cx_pkt_t *pkt) {
   char header[12];
-  mem_put_le32(header, sz);
+  vpx_codec_pts_t pts;
+
+  if (pkt->kind != VPX_CODEC_CX_FRAME_PKT) return;
+
+  pts = pkt->data.frame.pts;
+  mem_put_le32(header, pkt->data.frame.sz);
   mem_put_le32(header + 4, pts & 0xFFFFFFFF);
   mem_put_le32(header + 8, pts >> 32);
 
@@ -158,24 +139,22 @@
   (void)fwrite(header, 1, 12, outfile);
 }
 
-static void parse_command_line(int argc, char **argv, SvcContext *svc_ctx,
-                               vpx_codec_enc_cfg_t *enc_cfg) {
+static void check_parameters() {
+  if (number_spatial_layers > 5) die("Cannot support more than 5 layers");
+}
+
+static void parse_command_line(int argc, char **argv,
+                               vpx_codec_enc_cfg_t *cfg) {
   unsigned int width = 1920;
   unsigned int height = 1080;
   unsigned int timebase_num = 1;
   unsigned int timebase_den = 60;
   unsigned int bitrate = 1000;
-  unsigned int number_spatial_layers = 5;
-  int use_dummy_frame = 1;
-
   int c;
   vpx_codec_err_t res;
-  int r = 0;
-  int q = 0;
 
   opterr = 0;
-  while ((c = getopt(argc, argv, "f:w:h:n:d:b:s:l:g:r:q:z:")) != -1)
-    switch (c) {
+  while ((c = getopt(argc, argv, "f:w:h:n:d:b:s:l:p:")) != -1) switch (c) {
       case 'f':
         number_frames_to_code = atoi(optarg);
         break;
@@ -200,18 +179,9 @@
       case 'l':
         number_spatial_layers = atoi(optarg);
         break;
-      case 'g':
-        gop_size = atoi(optarg);
+      case 'p':
+        key_period = atoi(optarg);
         break;
-      case 'r':
-        scaling_factor = optarg;
-        break;
-      case 'q':
-        quantizer = optarg;
-        break;
-      case 'z':
-        use_dummy_frame = atoi(optarg);
-        break;
       case '?':
         usage(argv[0]);
     }
@@ -221,10 +191,6 @@
     usage(argv[0]);
   }
 
-  if ((r != 0 && q != 0 && r != q) || (r != number_spatial_layers && r != 0)) {
-    usage(argv[0]);
-  }
-
   input_filename = argv[optind];
   output_filename = argv[optind + 1];
 
@@ -231,18 +197,8 @@
   if (width < 16 || width % 2 || height < 16 || height % 2)
     die("Invalid resolution: %d x %d", width, height);
 
-  // initialize SvcContext
-  svc_ctx->log_level = SVC_LOG_DEBUG;
-  svc_ctx->spatial_layers = number_spatial_layers;
-  svc_ctx->encoding_mode = encoding_mode;
-  svc_ctx->gop_size = gop_size;
-  svc_ctx->quantizer_values = quantizer;
-  svc_ctx->scale_factors = scaling_factor;
-  // when using a dummy frame, that frame is only encoded to be full size
-  svc_ctx->first_frame_full_size = use_dummy_frame;
-
   /* Populate encoder configuration */
-  res = vpx_codec_enc_config_default(interface, enc_cfg, 0);
+  res = vpx_codec_enc_config_default(interface, cfg, 0);
   if (res) {
     die("Failed to get config: %s\n", vpx_codec_err_to_string(res));
   }
@@ -250,53 +206,201 @@
       "Codec %s\nframes: %d, skip: %d, layers: %d\n"
       "width %d, height: %d, \n"
       "num: %d, den: %d, bitrate: %d, \n"
-      "gop size: %d, use_dummy_frame: %d \n",
+      "key period: %d \n",
       vpx_codec_iface_name(interface), number_frames_to_code,
       number_frames_to_skip, number_spatial_layers, width, height, timebase_num,
-      timebase_den, bitrate, gop_size, use_dummy_frame);
+      timebase_den, bitrate, key_period);
 
-  enc_cfg->rc_target_bitrate = bitrate;
-  enc_cfg->g_w = width;
-  enc_cfg->g_h = height;
-  enc_cfg->g_timebase.num = timebase_num;
-  enc_cfg->g_timebase.den = timebase_den;
+  // Do minimal check at the application level. Encoder parameters will be
+  // checked internally
+  check_parameters();
+
+  cfg->rc_target_bitrate = bitrate;
+  cfg->g_w = width;
+  cfg->g_h = height;
+  cfg->g_timebase.num = timebase_num;
+  cfg->g_timebase.den = timebase_den;
+  cfg->ss_number_layers = number_spatial_layers;
 }
 
+static void set_default_configuration(vpx_codec_enc_cfg_t *cfg) {
+  /* Real time parameters */
+  cfg->rc_dropframe_thresh = 0;
+  cfg->rc_end_usage = VPX_CBR;
+  cfg->rc_resize_allowed = 0;
+  cfg->rc_min_quantizer = 33;
+  cfg->rc_max_quantizer = 33;
+  cfg->rc_undershoot_pct = 100;
+  cfg->rc_overshoot_pct = 15;
+  cfg->rc_buf_initial_sz = 500;
+  cfg->rc_buf_optimal_sz = 600;
+  cfg->rc_buf_sz = 1000;
+
+  /* Enable error resilient mode */
+  cfg->g_error_resilient = 1;
+  cfg->g_lag_in_frames = 0;
+
+  /* Disable automatic keyframe placement */
+  cfg->kf_mode = VPX_KF_DISABLED;
+  cfg->kf_min_dist = cfg->kf_max_dist = 3000;
+}
+
+static void initialize_codec(vpx_codec_ctx_t *codec, vpx_codec_enc_cfg_t *cfg) {
+  int max_intra_size_pct;
+
+  /* Initialize codec */
+  if (vpx_codec_enc_init(codec, interface, cfg, VPX_CODEC_USE_PSNR))
+    die_codec(codec, "Failed to initialize encoder");
+
+  vpx_codec_control(codec, VP9E_SET_SVC, 1);
+  /* Cap CPU & first I-frame size */
+  vpx_codec_control(codec, VP8E_SET_CPUUSED, 1);
+  vpx_codec_control(codec, VP8E_SET_STATIC_THRESHOLD, 1);
+  vpx_codec_control(codec, VP8E_SET_NOISE_SENSITIVITY, 1);
+  vpx_codec_control(codec, VP8E_SET_TOKEN_PARTITIONS, 1);
+
+  max_intra_size_pct =
+      (int)(((double)cfg->rc_buf_optimal_sz * 0.5) *
+            ((double)cfg->g_timebase.den / cfg->g_timebase.num) / 10.0);
+  /* printf ("max_intra_size_pct=%d\n", max_intra_size_pct); */
+
+  vpx_codec_control(codec, VP8E_SET_MAX_INTRA_BITRATE_PCT, max_intra_size_pct);
+}
+
+static int calculate_layer(int frame_cnt, int number_spatial_layers) {
+  if (frame_cnt == 0)
+    return 0;
+  else
+    return (frame_cnt + number_spatial_layers - 1) % number_spatial_layers;
+}
+
+static void switch_to_layer(int layer, unsigned int initial_width,
+                            unsigned int initial_height,
+                            vpx_codec_ctx_t *codec) {
+  // Set layer size
+  int scaling_factor_num[MAX_LAYERS] = {2, 1, 4, 2, 1};
+  int scaling_factor_den[MAX_LAYERS] = {9, 3, 9, 3, 1};
+
+  int quantizer[MAX_LAYERS] = {60, 53, 39, 33, 27};
+
+  unsigned int current_width;
+  unsigned int current_height;
+
+  current_width = initial_width *
+                  scaling_factor_num[layer + 5 - number_spatial_layers] /
+                  scaling_factor_den[layer + 5 - number_spatial_layers];
+  current_height = initial_height *
+                   scaling_factor_num[layer + 5 - number_spatial_layers] /
+                   scaling_factor_den[layer + 5 - number_spatial_layers];
+
+  current_width += current_width % 2;
+  current_height += current_height % 2;
+
+  vpx_codec_control(codec, VP9E_SET_WIDTH, &current_width);
+  vpx_codec_control(codec, VP9E_SET_HEIGHT, &current_height);
+
+  // Set layer context
+  vpx_codec_control(codec, VP9E_SET_LAYER, &layer);
+  vpx_codec_control(codec, VP9E_SET_MAX_Q,
+                    quantizer[layer + 5 - number_spatial_layers]);
+  vpx_codec_control(codec, VP9E_SET_MIN_Q,
+                    quantizer[layer + 5 - number_spatial_layers]);
+}
+
+static int get_flag(int is_I_frame_in_layer, int layer, ENCODING_MODE mode) {
+  // First layer
+  switch (mode) {
+    case INTER_LAYER_PREDICTION_I:
+      if (is_I_frame_in_layer && layer == 0) return VPX_EFLAG_FORCE_KF;
+      if (layer == 0)
+        return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+               VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF;
+      else if (is_I_frame_in_layer)
+        return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+               VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_LAST;
+      else
+        return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+               VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF;
+      break;
+
+    case INTER_LAYER_PREDICTION_IP:
+      if (is_I_frame_in_layer && layer == 0) return VPX_EFLAG_FORCE_KF;
+      if (layer == 0)
+        return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+               VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF;
+      else if (is_I_frame_in_layer)
+        return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+               VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_LAST;
+      else
+        return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF;
+      break;
+
+    case USE_GOLDEN_FRAME:
+      if (is_I_frame_in_layer && layer == 0) return VPX_EFLAG_FORCE_KF;
+      if (2 * number_spatial_layers - NUM_BUFFERS <= layer) {
+        if (layer == 0)
+          return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+                 VP8_EFLAG_NO_REF_ARF;
+        else if (is_I_frame_in_layer)
+          return VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF |
+                 VP8_EFLAG_NO_REF_LAST;
+        else
+          return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF;
+      } else {
+        if (layer == 0)
+          return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+                 VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF;
+        else if (is_I_frame_in_layer)
+          return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+                 VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_LAST;
+        else
+          return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF |
+                 VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF;
+      }
+      break;
+    default:
+      return VPX_EFLAG_FORCE_KF;
+  }
+}
+
 int main(int argc, char **argv) {
-  FILE *infile, *outfile;
+  FILE *infile, *outfile[MAX_LAYERS];
   vpx_codec_ctx_t codec;
-  vpx_codec_enc_cfg_t enc_cfg;
-  SvcContext svc_ctx;
-  int i;
+  vpx_codec_enc_cfg_t cfg;
   int frame_cnt = 0;
   vpx_image_t raw;
+  int frame_avail = 1;
+  int got_data = 0;
+  int i;
+  int frames_in_layer[MAX_LAYERS] = {0};
   clock_t before;
   clock_t after;
-  vpx_codec_err_t res;
   int pts = 0;            /* PTS starts at 0 */
   int frame_duration = 1; /* 1 timebase tick per frame */
 
-  memset(&svc_ctx, 0, sizeof(svc_ctx));
-  svc_ctx.log_print = 1;
-  parse_command_line(argc, argv, &svc_ctx, &enc_cfg);
+  parse_command_line(argc, argv, &cfg);
 
   // Allocate image buffer
-  if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, enc_cfg.g_w, enc_cfg.g_h, 32))
-    die("Failed to allocate image", enc_cfg.g_w, enc_cfg.g_h);
+  if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, cfg.g_w, cfg.g_h, 32))
+    die("Failed to allocate image", cfg.g_w, cfg.g_h);
 
+  set_default_configuration(&cfg);
+
+  /* Open input file */
   if (!(infile = fopen(input_filename, "rb")))
     die("Failed to open %s for reading", argv[1]);
 
-  if (!(outfile = fopen(output_filename, "wb")))
-    die("Failed to open %s for writing", output_filename);
+  /* Open output file  */
+  for (i = 0; i < number_spatial_layers; i++) {
+    char file_name[512];
+    snprintf(file_name, sizeof(file_name), "%s_%d.ivf", output_filename, i);
+    if (!(outfile[i] = fopen(file_name, "wb")))
+      die("Failed to open %s for writing", file_name);
+    write_ivf_file_header(outfile[i], &cfg, 0);
+  }
 
-  // Initialize codec
-  if (vpx_svc_init(&svc_ctx, &codec, interface, &enc_cfg) != VPX_CODEC_OK)
-    die("Failed to initialize encoder");
+  initialize_codec(&codec, &cfg);
 
-  write_ivf_file_header(outfile, enc_cfg.g_w, enc_cfg.g_h,
-                        enc_cfg.g_timebase.num, enc_cfg.g_timebase.den, 0);
-
   // skip initial frames
   for (i = 0; i < number_frames_to_skip; i++) {
     read_frame(infile, &raw);
@@ -303,47 +407,81 @@
   }
 
   before = clock();
-  // Encode frames
-  while (frame_cnt <= number_frames_to_code) {
-    if (frame_cnt == 0 && svc_ctx.first_frame_full_size) {
-      create_dummy_frame(&raw);
-    } else {
-      if (!read_frame(infile, &raw)) break;
+  // Encoding frames
+  while ((frame_avail || got_data) &&
+         frame_cnt <= number_frames_to_code * number_spatial_layers) {
+    int flags = 0;
+    vpx_codec_iter_t iter = NULL;
+    const vpx_codec_cx_pkt_t *pkt;
+
+    int layer = calculate_layer(frame_cnt, number_spatial_layers);
+    int is_I_frame_in_layer =
+        (((frame_cnt - 1) / number_spatial_layers % key_period) == 0);
+    int is_dummy = (frame_cnt == 0);
+
+    if (is_dummy) {  // Dummy frame
+      flags = VPX_EFLAG_FORCE_KF;
+      frame_avail = read_dummy_frame(&raw);
+
+    } else {  // Regular frame
+      // Read a new frame only at the base layer
+      if (layer == 0) frame_avail = read_frame(infile, &raw);
+      switch_to_layer(layer, cfg.g_w, cfg.g_h, &codec);
+      flags = get_flag(is_I_frame_in_layer, layer, INTER_LAYER_PREDICTION_I);
     }
-    res = vpx_svc_encode(&svc_ctx, &codec, &raw, pts, frame_duration,
-                         VPX_DL_REALTIME);
-    printf("%s", svc_get_message(&svc_ctx));
-    if (res != VPX_CODEC_OK) {
+
+    // Actual Encoding
+    if (vpx_codec_encode(&codec, frame_avail ? &raw : NULL, pts, 1, flags,
+                         VPX_DL_REALTIME))
       die_codec(&codec, "Failed to encode frame");
+
+    got_data = 0;
+    // Process data / Get PSNR statistics
+    while ((pkt = vpx_codec_get_cx_data(&codec, &iter))) {
+      got_data = 1;
+      switch (pkt->kind) {
+        case VPX_CODEC_CX_FRAME_PKT:
+          for (i = layer; i < number_spatial_layers; i++) {
+            write_ivf_frame_header(outfile[i], pkt);
+            (void)fwrite(pkt->data.frame.buf, 1, pkt->data.frame.sz,
+                         outfile[i]);
+            frames_in_layer[i]++;
+          }
+          break;
+        case VPX_CODEC_PSNR_PKT:
+          if (frame_cnt != 0)
+            printf(
+                "Processed Frame %d, layer %d, PSNR(Total/Y/U/V): "
+                "%2.3f  %2.3f  %2.3f  %2.3f \n",
+                (frame_cnt - 1) / number_spatial_layers + 1, layer,
+                pkt->data.psnr.psnr[0], pkt->data.psnr.psnr[1],
+                pkt->data.psnr.psnr[2], pkt->data.psnr.psnr[3]);
+          break;
+        default:
+          break;
+      }
     }
-    if (svc_get_frame_size(&svc_ctx) > 0) {
-      write_ivf_frame_header(outfile, pts, svc_get_frame_size(&svc_ctx));
-      (void)fwrite(svc_get_buffer(&svc_ctx), 1, svc_get_frame_size(&svc_ctx),
-                   outfile);
-    }
     frame_cnt++;
+    // TODO(ivan): Modify ts later if(!layer)
     pts += frame_duration;
-  }  // end encode frames loop
+  }
+  // end while
 
   after = clock();
   printf("Processed %d frames in different resolutions in %ld ms.\n",
-         frame_cnt - svc_ctx.first_frame_full_size,
-         (int)(after - before) / (CLOCKS_PER_SEC / 1000));
+         frame_cnt - 1, (int)(after - before) / (CLOCKS_PER_SEC / 1000));
 
   fclose(infile);
+
   if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
 
-  // rewrite the output file headers with the actual frame count
-  if (!fseek(outfile, 0, SEEK_SET)) {
-    write_ivf_file_header(outfile, enc_cfg.g_w, enc_cfg.g_h,
-                          enc_cfg.g_timebase.num, enc_cfg.g_timebase.den,
-                          frame_cnt);
+  /* Try to rewrite the output file headers with the actual frame count */
+  for (i = 0; i < number_spatial_layers; i++) {
+    if (!fseek(outfile[i], 0, SEEK_SET)) {
+      write_ivf_file_header(outfile[i], &cfg, frames_in_layer[i]);
+    }
+    fclose(outfile[i]);
   }
-  fclose(outfile);
-
-  // display average size, psnr
-  svc_dump_statistics(&svc_ctx);
-  printf("%s", svc_get_message(&svc_ctx));
 
   return EXIT_SUCCESS;
 }
--- a/vpx/exports_enc
+++ b/vpx/exports_enc
@@ -6,12 +6,3 @@
 text vpx_codec_get_global_headers
 text vpx_codec_get_preview_frame
 text vpx_codec_set_cx_data_buf
-text vpx_svc_init
-text vpx_svc_encode
-text svc_dump_statistics
-text svc_get_message
-text svc_get_buffer
-text svc_get_frame_size
-text svc_get_encode_frame_count
-text svc_is_keyframe
-text svc_set_keyframe
\ No newline at end of file
--- a/vpx/src/svc_encodeframe.c
+++ /dev/null
@@ -1,793 +1,0 @@
-/**
- * @file
- * VP9 SVC encoding support via libvpx
- */
-
-#define VPX_DISABLE_CTRL_TYPECHECKS 1
-#define VPX_CODEC_DISABLE_COMPAT 1
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdarg.h>
-#include "vpx/vpx_encoder.h"
-#include "vpx/vp8cx.h"
-#include "vpx/svc_context.h"
-
-#define SVC_REFERENCE_FRAMES 8
-
-static const char* DEFAULT_QUANTIZER_VALUES = "60,53,39,33,27";
-static const char* DEFAULT_SCALE_FACTORS = "4/16,5/16,7/16,11/16,16/16";
-static char* colors[VPX_SS_MAX_LAYERS] = {"\x1B[35m", "\x1B[32m", "\x1B[33m",
-                                          "\x1B[34m", "\x1B[36m"};
-static char* normal_color = "\x1B[0m";
-
-typedef struct SvcInternal {
-  // values extracted from options
-  int scaling_factor_num[VPX_SS_MAX_LAYERS];
-  int scaling_factor_den[VPX_SS_MAX_LAYERS];
-  int quantizer[VPX_SS_MAX_LAYERS];
-
-  // accumulated statistics
-  double psnr_in_layer[VPX_SS_MAX_LAYERS];
-  int bytes_in_layer[VPX_SS_MAX_LAYERS];
-
-  // codec encoding values
-  int width;
-  int height;
-
-  // state variables
-  int encode_frame_count;
-  int frame_within_gop;
-  vpx_enc_frame_flags_t enc_frame_flags;
-  int layers;
-  int layer;
-  int is_keyframe;
-
-  size_t frame_size;
-  size_t buffer_size;
-  void* buffer;
-
-  char message_buffer[2048];
-  vpx_codec_ctx_t* codec_ctx;
-} SvcInternal;
-
-// One encoded frame layer
-struct LayerData {
-  void* buf;    // compressed data buffer
-  size_t size;  // length of compressed data
-  struct LayerData* next;
-};
-
-// forward references
-static void svc_log_reset(SvcContext* svc_ctx);
-static int svc_log(SvcContext* svc_ctx, int level, char* fmt, ...);
-static vpx_codec_err_t svc_parse_input_parameters(SvcContext* svc_ctx);
-static int vpx_svc_dummy_frame(SvcContext* svc_ctx, SvcInternal* si);
-
-// create LayerData from encoder output
-static struct LayerData* ld_create(void* buf, size_t size) {
-  struct LayerData* layer_data;
-
-  layer_data = malloc(sizeof(struct LayerData));
-  if (layer_data == NULL) {
-    return NULL;
-  }
-  layer_data->buf = malloc(size);
-  if (layer_data->buf == NULL) {
-    return NULL;
-  }
-  memcpy(layer_data->buf, buf, size);
-  layer_data->size = size;
-  return layer_data;
-}
-
-// free LayerData
-static void ld_free(struct LayerData* layer_data) {
-  if (layer_data->buf) {
-    free(layer_data->buf);
-    layer_data->buf = NULL;
-  }
-  free(layer_data);
-}
-
-// add layer data to list
-static void ld_list_add(struct LayerData** list, struct LayerData* layer_data) {
-  struct LayerData** p = list;
-
-  while (*p != NULL) p = &(*p)->next;
-  *p = layer_data;
-  layer_data->next = NULL;
-}
-
-// get accumulated size of layer data
-static size_t ld_list_get_buffer_size(struct LayerData* list) {
-  struct LayerData* p;
-  size_t size = 0;
-
-  for (p = list; p != NULL; p = p->next) {
-    size += p->size;
-  }
-  return size;
-}
-
-// copy layer data to buffer
-static void ld_list_copy_to_buffer(struct LayerData* list, uint8_t* buffer) {
-  struct LayerData* p;
-
-  for (p = list; p != NULL; p = p->next) {
-    buffer[0] = 1;
-    memcpy(buffer, p->buf, p->size);
-    buffer += p->size;
-  }
-}
-
-// free layer data list
-static void ld_list_free(struct LayerData* list) {
-  struct LayerData* p = list;
-
-  while (p) {
-    list = list->next;
-    ld_free(p);
-    p = list;
-  }
-}
-
-// Superframe Index
-#define SUPERFRAME_SLOTS (8)
-#define SUPERFRAME_BUFFER_SIZE (SUPERFRAME_SLOTS * sizeof(uint32_t) + 2)
-
-struct Superframe {
-  int count;
-  uint32_t sizes[SUPERFRAME_SLOTS];
-  uint32_t magnitude;
-  uint8_t buffer[SUPERFRAME_BUFFER_SIZE];
-  size_t index_size;
-};
-
-static void sf_create_index(struct Superframe* sf) {
-  uint8_t marker = 0xc0;
-  int mag, mask;
-  uint8_t* bufp;
-  int i, j;
-  int this_sz;
-
-  if (sf->count == 0 || sf->count >= 8) return;
-
-  /* Add the number of frames to the marker byte */
-  marker |= sf->count - 1;
-
-  /* Choose the magnitude */
-  for (mag = 0, mask = 0xff; mag < 4; mag++) {
-    if (sf->magnitude < mask) break;
-    mask <<= 8;
-    mask |= 0xff;
-  }
-  marker |= mag << 3;
-
-  /* Write the index */
-  sf->index_size = 2 + (mag + 1) * sf->count;
-  bufp = sf->buffer;
-
-  *bufp++ = marker;
-  for (i = 0; i < sf->count; i++) {
-    this_sz = sf->sizes[i];
-
-    for (j = 0; j <= mag; j++) {
-      *bufp++ = this_sz & 0xff;
-      this_sz >>= 8;
-    }
-  }
-  *bufp++ = marker;
-}
-
-static vpx_codec_err_t svc_invalid_scale_factor(SvcContext* svc_ctx) {
-  svc_log(svc_ctx, SVC_LOG_ERROR, "svc-scale-factors: invalid value\n");
-  return VPX_CODEC_INVALID_PARAM;
-}
-
-static vpx_codec_err_t svc_parse_input_parameters(SvcContext* svc_ctx) {
-  char* input_string;
-  char* token;
-  const char* delim = ",";
-  char* save_ptr;
-  int found;
-  int i, q;
-  int64_t num, den;
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-
-  // parse quantizer_values
-  if (svc_ctx->quantizer_values == NULL ||
-      strlen(svc_ctx->quantizer_values) == 0) {
-    input_string = strdup(DEFAULT_QUANTIZER_VALUES);
-  } else {
-    input_string = strdup(svc_ctx->quantizer_values);
-  }
-
-  found = 0;
-  token = strtok_r(input_string, delim, &save_ptr);
-  for (i = 0; i < si->layers; i++) {
-    if (token != NULL) {
-      q = atoi(token);
-      if (q <= 0 || q > 100) {
-        svc_log(svc_ctx, SVC_LOG_ERROR,
-                "svc-quantizer-values: invalid value\n");
-        return VPX_CODEC_INVALID_PARAM;
-      }
-      token = strtok_r(NULL, delim, &save_ptr);
-      found = i + 1;
-    } else {
-      q = 0;
-    }
-    si->quantizer[i + VPX_SS_MAX_LAYERS - si->layers] = q;
-  }
-  free(input_string);
-  if (found != si->layers) {
-    svc_log(svc_ctx, SVC_LOG_ERROR,
-            "svc-quantizer-values: %d values required, but only %d specified\n",
-            si->layers, found);
-    return VPX_CODEC_INVALID_PARAM;
-  }
-
-  // parse scale_factors
-  if (svc_ctx->scale_factors == NULL || strlen(svc_ctx->scale_factors) == 0) {
-    input_string = strdup(DEFAULT_SCALE_FACTORS);
-  } else {
-    input_string = strdup(svc_ctx->scale_factors);
-  }
-  found = 0;
-  token = strtok_r(input_string, delim, &save_ptr);
-  for (i = 0; i < si->layers; i++) {
-    num = den = 1;
-    if (token != NULL) {
-      num = strtol(token, &token, 10);
-      if (num <= 0) return svc_invalid_scale_factor(svc_ctx);
-      if (*token++ != '/') return svc_invalid_scale_factor(svc_ctx);
-      den = strtol(token, &token, 10);
-      if (den <= 0) return svc_invalid_scale_factor(svc_ctx);
-
-      token = strtok_r(NULL, delim, &save_ptr);
-      found = i + 1;
-    }
-    si->scaling_factor_num[i + VPX_SS_MAX_LAYERS - si->layers] = (int)num;
-    si->scaling_factor_den[i + VPX_SS_MAX_LAYERS - si->layers] = (int)den;
-  }
-  free(input_string);
-  if (found != si->layers) {
-    svc_log(svc_ctx, SVC_LOG_ERROR,
-            "svc-scale-factors: %d values required, but only %d specified\n",
-            si->layers, found);
-    return VPX_CODEC_INVALID_PARAM;
-  }
-  return VPX_CODEC_OK;
-}
-
-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* enc_cfg) {
-  int max_intra_size_pct;
-  vpx_codec_err_t res;
-  SvcInternal* si;
-
-  if (svc_ctx->internal == NULL) {
-    svc_ctx->internal = malloc(sizeof(SvcInternal));
-  }
-  si = (SvcInternal*)svc_ctx->internal;
-  memset(si, 0, sizeof(SvcInternal));
-  si->codec_ctx = codec_ctx;
-
-  if (svc_ctx->spatial_layers < 1 ||
-      svc_ctx->spatial_layers > VPX_SS_MAX_LAYERS) {
-    svc_log(svc_ctx, SVC_LOG_ERROR, "spatial layers: invalid value: %d\n",
-            svc_ctx->spatial_layers);
-    return VPX_CODEC_INVALID_PARAM;
-  }
-
-  if (svc_ctx->gop_size < 2) {
-    svc_log(svc_ctx, SVC_LOG_ERROR, "gop_size too small: %d\n",
-            svc_ctx->gop_size);
-    return VPX_CODEC_INVALID_PARAM;
-  }
-
-  si->width = enc_cfg->g_w;
-  si->height = enc_cfg->g_h;
-
-  // use SvcInternal value for number of layers to enable forcing one layer
-  // for first frame
-  si->layers = svc_ctx->spatial_layers;
-
-  // parse quantizer values and scale factors
-  res = svc_parse_input_parameters(svc_ctx);
-  if (res != VPX_CODEC_OK) return res;
-
-  // initialize encoder configuration
-  enc_cfg->ss_number_layers = si->layers;
-  // force single pass
-  enc_cfg->g_pass = VPX_RC_ONE_PASS;
-  // Lag in frames not currently supported
-  enc_cfg->g_lag_in_frames = 0;
-
-  // TODO(ivanmaltz): determine if these values need to be set explicitly for
-  // svc, or if the normal default/override mechanism can be used
-  enc_cfg->rc_dropframe_thresh = 0;
-  enc_cfg->rc_end_usage = VPX_CBR;
-  enc_cfg->rc_resize_allowed = 0;
-  enc_cfg->rc_min_quantizer = 33;
-  enc_cfg->rc_max_quantizer = 33;
-  enc_cfg->rc_undershoot_pct = 100;
-  enc_cfg->rc_overshoot_pct = 15;
-  enc_cfg->rc_buf_initial_sz = 500;
-  enc_cfg->rc_buf_optimal_sz = 600;
-  enc_cfg->rc_buf_sz = 1000;
-
-  enc_cfg->g_error_resilient = 1;
-  enc_cfg->kf_mode = VPX_KF_DISABLED;
-  enc_cfg->kf_min_dist = enc_cfg->kf_max_dist = 3000;
-
-  // Initialize codec
-  res = vpx_codec_enc_init(codec_ctx, iface, enc_cfg, VPX_CODEC_USE_PSNR);
-  if (res != VPX_CODEC_OK) {
-    svc_log(svc_ctx, SVC_LOG_ERROR, "svc_enc_init error\n");
-    return res;
-  }
-
-  vpx_codec_control(codec_ctx, VP9E_SET_SVC, 1);
-
-  // Cap CPU & first I-frame size
-  vpx_codec_control(codec_ctx, VP8E_SET_CPUUSED, 1);
-  vpx_codec_control(codec_ctx, VP8E_SET_STATIC_THRESHOLD, 1);
-  vpx_codec_control(codec_ctx, VP8E_SET_NOISE_SENSITIVITY, 1);
-  vpx_codec_control(codec_ctx, VP8E_SET_TOKEN_PARTITIONS, 1);
-
-  max_intra_size_pct =
-      (int)(((double)enc_cfg->rc_buf_optimal_sz * 0.5) *
-            ((double)enc_cfg->g_timebase.den / enc_cfg->g_timebase.num) / 10.0);
-  vpx_codec_control(codec_ctx, VP8E_SET_MAX_INTRA_BITRATE_PCT,
-                    max_intra_size_pct);
-  return VPX_CODEC_OK;
-}
-
-// SVC Algorithm flags - these get mapped to VP8_EFLAG_* defined in vp8cx.h
-
-// encoder should reference the last frame
-#define USE_LAST (1 << 0)
-
-// encoder should reference the alt ref frame
-#define USE_ARF (1 << 1)
-
-// encoder should reference the golden frame
-#define USE_GF (1 << 2)
-
-// encoder should copy current frame to the last frame buffer
-#define UPDATE_LAST (1 << 3)
-
-// encoder should copy current frame to the alt ref frame buffer
-#define UPDATE_ARF (1 << 4)
-
-// encoder should copy current frame to the golden frame
-#define UPDATE_GF (1 << 5)
-
-static int map_vp8_flags(int svc_flags) {
-  int flags = 0;
-
-  if (!(svc_flags & USE_LAST)) flags |= VP8_EFLAG_NO_REF_LAST;
-
-  if (!(svc_flags & USE_ARF)) flags |= VP8_EFLAG_NO_REF_ARF;
-
-  if (!(svc_flags & USE_GF)) flags |= VP8_EFLAG_NO_REF_GF;
-
-  if (svc_flags & UPDATE_LAST) {
-    // last is updated automatically
-  } else {
-    flags |= VP8_EFLAG_NO_UPD_LAST;
-  }
-
-  if (svc_flags & UPDATE_ARF) {
-    flags |= VP8_EFLAG_FORCE_ARF;
-  } else {
-    flags |= VP8_EFLAG_NO_UPD_ARF;
-  }
-
-  if (svc_flags & UPDATE_GF) {
-    flags |= VP8_EFLAG_FORCE_GF;
-  } else {
-    flags |= VP8_EFLAG_NO_UPD_GF;
-  }
-
-  return flags;
-}
-
-static void calculate_enc_frame_flags(SvcContext* svc_ctx) {
-  vpx_enc_frame_flags_t flags = VPX_EFLAG_FORCE_KF;
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-
-  int is_keyframe = (si->frame_within_gop == 0);
-
-  // keyframe layer zero is identical for all modes
-  if ((is_keyframe && si->layer == 0) || vpx_svc_dummy_frame(svc_ctx, si)) {
-    si->enc_frame_flags = VPX_EFLAG_FORCE_KF;
-    return;
-  }
-
-  switch (svc_ctx->encoding_mode) {
-    case ALT_INTER_LAYER_PREDICTION_IP:
-      if (si->layer == 0) {
-        flags = map_vp8_flags(USE_LAST | UPDATE_LAST);
-      } else if (is_keyframe) {
-        if (si->layer == si->layers - 1) {
-          flags = map_vp8_flags(USE_ARF | UPDATE_LAST);
-        } else {
-          flags = map_vp8_flags(USE_ARF | UPDATE_LAST | UPDATE_GF);
-        }
-      } else {
-        flags = map_vp8_flags(USE_LAST | USE_ARF | UPDATE_LAST);
-      }
-      break;
-    case INTER_LAYER_PREDICTION_I:
-      if (si->layer == 0) {
-        flags = map_vp8_flags(USE_LAST | UPDATE_LAST);
-      } else if (is_keyframe) {
-        flags = map_vp8_flags(USE_ARF | UPDATE_LAST);
-      } else {
-        flags = map_vp8_flags(USE_LAST | UPDATE_LAST);
-      }
-      break;
-    case INTER_LAYER_PREDICTION_IP:
-      if (si->layer == 0) {
-        flags = map_vp8_flags(USE_LAST | UPDATE_LAST);
-      } else if (is_keyframe) {
-        flags = map_vp8_flags(USE_ARF | UPDATE_LAST);
-      } else {
-        flags = map_vp8_flags(USE_LAST | USE_ARF | UPDATE_LAST);
-      }
-      break;
-    case USE_GOLDEN_FRAME:
-      if (2 * si->layers - SVC_REFERENCE_FRAMES <= si->layer) {
-        if (si->layer == 0) {
-          flags = map_vp8_flags(USE_LAST | USE_GF | UPDATE_LAST);
-        } else if (is_keyframe) {
-          flags = map_vp8_flags(USE_ARF | UPDATE_LAST | UPDATE_GF);
-        } else {
-          flags = map_vp8_flags(USE_LAST | USE_ARF | USE_GF | UPDATE_LAST);
-        }
-      } else {
-        if (si->layer == 0) {
-          flags = map_vp8_flags(USE_LAST | UPDATE_LAST);
-        } else if (is_keyframe) {
-          flags = map_vp8_flags(USE_ARF | UPDATE_LAST);
-        } else {
-          flags = map_vp8_flags(USE_LAST | UPDATE_LAST);
-        }
-      }
-      break;
-    default:
-      svc_log(svc_ctx, SVC_LOG_ERROR, "unexpected encoding mode: %d\n",
-              svc_ctx->encoding_mode);
-      break;
-  }
-  si->enc_frame_flags = flags;
-}
-
-vpx_codec_err_t svc_get_layer_resolution(SvcContext* svc_ctx, int layer,
-                                         unsigned int* width,
-                                         unsigned int* height) {
-  int w, h, index, num, den;
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-
-  if (layer < 0 || layer >= si->layers) return VPX_CODEC_INVALID_PARAM;
-
-  index = layer + VPX_SS_MAX_LAYERS - si->layers;
-  num = si->scaling_factor_num[index];
-  den = si->scaling_factor_den[index];
-  if (num == 0 || den == 0) return VPX_CODEC_INVALID_PARAM;
-
-  w = si->width * num / den;
-  h = si->height * num / den;
-
-  // make height and width even to make chrome player happy
-  w += w % 2;
-  h += h % 2;
-
-  *width = w;
-  *height = h;
-
-  return VPX_CODEC_OK;
-}
-
-static void set_svc_parameters(SvcContext* svc_ctx,
-                               vpx_codec_ctx_t* codec_ctx) {
-  int layer, layer_index;
-  vpx_svc_parameters_t svc_params;
-  int use_higher_layer;
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-
-  memset(&svc_params, 0, sizeof(svc_params));
-  svc_params.layer = si->layer;
-  svc_params.flags = si->enc_frame_flags;
-
-  layer = si->layer;
-  if (svc_ctx->encoding_mode == ALT_INTER_LAYER_PREDICTION_IP &&
-      si->frame_within_gop == 0) {
-    // layers 1 & 3 don't exist in this mode, use the higher one
-    if (layer == 0 || layer == 2) {
-      layer += 1;
-    }
-  }
-  if (VPX_CODEC_OK != svc_get_layer_resolution(svc_ctx, layer,
-                                               &svc_params.width,
-                                               &svc_params.height)) {
-    svc_log(svc_ctx, SVC_LOG_ERROR, "svc_get_layer_resolution failed\n");
-  }
-  layer_index = layer + VPX_SS_MAX_LAYERS - si->layers;
-  svc_params.min_quantizer = si->quantizer[layer_index];
-  svc_params.max_quantizer = si->quantizer[layer_index];
-  svc_params.distance_from_i_frame = si->frame_within_gop;
-
-  // Use buffer i for layer i LST
-  svc_params.lst_fb_idx = si->layer;
-
-  // Use buffer i-1 for layer i Alt (Inter-layer prediction)
-  if (si->layer != 0) {
-    use_higher_layer =
-        svc_ctx->encoding_mode == ALT_INTER_LAYER_PREDICTION_IP &&
-        si->frame_within_gop == 0;
-    svc_params.alt_fb_idx = use_higher_layer ? si->layer - 2 : si->layer - 1;
-  }
-
-  if (svc_ctx->encoding_mode == ALT_INTER_LAYER_PREDICTION_IP) {
-    svc_params.gld_fb_idx = si->layer + 1;
-  } else {
-    if (si->layer < 2 * si->layers - SVC_REFERENCE_FRAMES)
-      svc_params.gld_fb_idx = svc_params.lst_fb_idx;
-    else
-      svc_params.gld_fb_idx = 2 * si->layers - 1 - si->layer;
-  }
-
-  svc_log(svc_ctx, SVC_LOG_DEBUG, "%sSVC frame: %d, layer: %d, %dx%d, q: %d\n",
-          svc_ctx->log_print ? colors[si->layer] : "",  //
-          si->encode_frame_count, si->layer, svc_params.width,
-          svc_params.height, svc_params.min_quantizer);
-
-  if (svc_params.flags == VPX_EFLAG_FORCE_KF) {
-    svc_log(svc_ctx, SVC_LOG_DEBUG, "flags == VPX_EFLAG_FORCE_KF\n");
-  } else {
-    svc_log(
-        svc_ctx, SVC_LOG_DEBUG, "Using:    LST/GLD/ALT [%2d|%2d|%2d]\n",
-        svc_params.flags & VP8_EFLAG_NO_REF_LAST ? -1 : svc_params.lst_fb_idx,
-        svc_params.flags & VP8_EFLAG_NO_REF_GF ? -1 : svc_params.gld_fb_idx,
-        svc_params.flags & VP8_EFLAG_NO_REF_ARF ? -1 : svc_params.alt_fb_idx);
-    svc_log(
-        svc_ctx, SVC_LOG_DEBUG, "Updating: LST/GLD/ALT [%2d|%2d|%2d]\n",
-        svc_params.flags & VP8_EFLAG_NO_UPD_LAST ? -1 : svc_params.lst_fb_idx,
-        svc_params.flags & VP8_EFLAG_NO_UPD_GF ? -1 : svc_params.gld_fb_idx,
-        svc_params.flags & VP8_EFLAG_NO_UPD_ARF ? -1 : svc_params.alt_fb_idx);
-  }
-
-  vpx_codec_control(codec_ctx, VP9E_SET_SVC_PARAMETERS, &svc_params);
-}
-
-/**
- * Helper to check if the current frame is the first, full resolution dummy.
- */
-static int vpx_svc_dummy_frame(SvcContext* svc_ctx, SvcInternal* si) {
-  return svc_ctx->first_frame_full_size == 1 && si->encode_frame_count == 0;
-}
-
-/**
- * Encode a frame into multiple layers
- * Create a superframe containing the individual 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) {
-  vpx_codec_err_t res;
-  vpx_codec_iter_t iter;
-  const vpx_codec_cx_pkt_t* cx_pkt;
-  struct LayerData* cx_layer_list = NULL;
-  struct LayerData* layer_data;
-  size_t frame_pkt_size;
-  struct Superframe superframe;
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-
-  memset(&superframe, 0, sizeof(superframe));
-  svc_log_reset(svc_ctx);
-
-  si->layers = vpx_svc_dummy_frame(svc_ctx, si) ? 1 : svc_ctx->spatial_layers;
-  if (si->frame_within_gop >= svc_ctx->gop_size ||
-      si->encode_frame_count == 0 ||
-      (si->encode_frame_count == 1 && svc_ctx->first_frame_full_size == 1)) {
-    si->frame_within_gop = 0;
-  }
-  si->is_keyframe = (si->frame_within_gop == 0);
-  si->frame_size = 0;
-
-  svc_log(svc_ctx, SVC_LOG_DEBUG,
-          "vpx_svc_encode  layers: %d, frame_count: %d, frame_within_gop: %d\n",
-          si->layers, si->encode_frame_count, si->frame_within_gop);
-
-  // encode each layer
-  for (si->layer = 0; si->layer < si->layers; si->layer++) {
-    if (svc_ctx->encoding_mode == ALT_INTER_LAYER_PREDICTION_IP &&
-        si->is_keyframe && (si->layer == 1 || si->layer == 3)) {
-      svc_log(svc_ctx, SVC_LOG_DEBUG, "Skip encoding layer %d\n", si->layer);
-      continue;
-    }
-    calculate_enc_frame_flags(svc_ctx);
-
-    if (vpx_svc_dummy_frame(svc_ctx, si)) {
-      // do not set svc parameters, use normal encode
-      svc_log(svc_ctx, SVC_LOG_DEBUG, "encoding full size first frame\n");
-    } else {
-      set_svc_parameters(svc_ctx, codec_ctx);
-    }
-    res = vpx_codec_encode(codec_ctx, rawimg, pts, duration,
-                           si->enc_frame_flags, deadline);
-    if (res != VPX_CODEC_OK) {
-      return res;
-    }
-    // save compressed data
-    iter = NULL;
-    while ((cx_pkt = vpx_codec_get_cx_data(codec_ctx, &iter))) {
-      switch (cx_pkt->kind) {
-        case VPX_CODEC_CX_FRAME_PKT:
-          frame_pkt_size = cx_pkt->data.frame.sz;
-          if (!vpx_svc_dummy_frame(svc_ctx, si)) {
-            si->bytes_in_layer[si->layer] += frame_pkt_size;
-
-            svc_log(svc_ctx, SVC_LOG_DEBUG,
-                    "SVC frame: %d, layer: %d, size: %ld%s\n",
-                    si->encode_frame_count, si->layer, frame_pkt_size,
-                    svc_ctx->log_print ? normal_color : "");
-          }
-          layer_data = ld_create(cx_pkt->data.frame.buf, frame_pkt_size);
-          if (layer_data == NULL) {
-            svc_log(svc_ctx, SVC_LOG_ERROR, "Error allocating LayerData\n");
-            return 0;
-          }
-          ld_list_add(&cx_layer_list, layer_data);
-
-          // save layer size in superframe index
-          superframe.sizes[superframe.count++] = frame_pkt_size;
-          superframe.magnitude |= frame_pkt_size;
-          break;
-        case VPX_CODEC_PSNR_PKT:
-          if (!vpx_svc_dummy_frame(svc_ctx, si)) {
-            svc_log(svc_ctx, SVC_LOG_DEBUG,
-                    "%sSVC frame: %d, layer: %d, PSNR(Total/Y/U/V): "
-                    "%2.3f  %2.3f  %2.3f  %2.3f \n",
-                    svc_ctx->log_print ? colors[si->layer] : "",
-                    si->encode_frame_count, si->layer,
-                    cx_pkt->data.psnr.psnr[0], cx_pkt->data.psnr.psnr[1],
-                    cx_pkt->data.psnr.psnr[2], cx_pkt->data.psnr.psnr[3]);
-            si->psnr_in_layer[si->layer] += cx_pkt->data.psnr.psnr[0];
-          }
-          break;
-        default:
-          break;
-      }
-    }
-  }
-  // add superframe index to layer data list
-  if (!vpx_svc_dummy_frame(svc_ctx, si)) {
-    sf_create_index(&superframe);
-    layer_data = ld_create(superframe.buffer, superframe.index_size);
-    ld_list_add(&cx_layer_list, layer_data);
-  }
-  // get accumulated size of layer data
-  si->frame_size = ld_list_get_buffer_size(cx_layer_list);
-  if (si->frame_size == 0) return VPX_CODEC_ERROR;
-
-  // all layers encoded, create single buffer with concatenated layers
-  if (si->frame_size > si->buffer_size) {
-    free(si->buffer);
-    si->buffer = malloc(si->frame_size);
-    si->buffer_size = si->frame_size;
-  }
-  // copy layer data into packet
-  ld_list_copy_to_buffer(cx_layer_list, si->buffer);
-
-  ld_list_free(cx_layer_list);
-
-  svc_log(svc_ctx, SVC_LOG_DEBUG,
-          "SVC frame: %d, kf: %d, size: %ld, pts: %ld\n",
-          si->encode_frame_count, si->is_keyframe, si->frame_size, pts);
-  si->frame_within_gop++;
-  si->encode_frame_count++;
-
-  return VPX_CODEC_OK;
-}
-
-char* svc_get_message(SvcContext* svc_ctx) {
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-  return si->message_buffer;
-}
-
-void* svc_get_buffer(SvcContext* svc_ctx) {
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-  return si->buffer;
-}
-
-int svc_get_frame_size(SvcContext* svc_ctx) {
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-  return si->frame_size;
-}
-
-int svc_get_encode_frame_count(SvcContext* svc_ctx) {
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-  return si->encode_frame_count;
-}
-
-int svc_is_keyframe(SvcContext* svc_ctx) {
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-  return (si->is_keyframe);
-}
-
-void svc_set_keyframe(SvcContext* svc_ctx) {
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-  si->frame_within_gop = 0;
-}
-
-void svc_dump_statistics(SvcContext* svc_ctx) {
-  int number_of_frames, number_of_keyframes, encode_frame_count;
-  int i;
-  int bytes_total = 0;
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-
-  svc_log_reset(svc_ctx);
-
-  encode_frame_count = si->encode_frame_count;
-  if (svc_ctx->first_frame_full_size) encode_frame_count--;
-  if (si->encode_frame_count <= 0) return;
-
-  svc_log(svc_ctx, SVC_LOG_INFO, "\n");
-  number_of_keyframes = encode_frame_count / svc_ctx->gop_size + 1;
-  for (i = 0; i < si->layers; i++) {
-    number_of_frames = encode_frame_count;
-
-    if (svc_ctx->encoding_mode == ALT_INTER_LAYER_PREDICTION_IP &&
-        (i == 1 || i == 3)) {
-      number_of_frames -= number_of_keyframes;
-    }
-    svc_log(svc_ctx, SVC_LOG_INFO, "Layer %d PSNR=[%2.3f], Bytes=[%d]\n", i,
-            (double)si->psnr_in_layer[i] / number_of_frames,
-            si->bytes_in_layer[i]);
-    bytes_total += si->bytes_in_layer[i];
-  }
-
-  // only display statistics once
-  si->encode_frame_count = 0;
-
-  svc_log(svc_ctx, SVC_LOG_INFO, "Total Bytes=[%d]\n", bytes_total);
-}
-
-static void svc_log_reset(SvcContext* svc_ctx) {
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-  si->message_buffer[0] = '\0';
-}
-
-static int svc_log(SvcContext* svc_ctx, int level, char* fmt, ...) {
-  char buf[512];
-  int retval = 0;
-  va_list ap;
-  SvcInternal* si = (SvcInternal*)svc_ctx->internal;
-
-  if (level > svc_ctx->log_level) {
-    return retval;
-  }
-
-  va_start(ap, fmt);
-  retval = vsnprintf(buf, sizeof(buf), fmt, ap);
-  va_end(ap);
-
-  if (svc_ctx->log_print) {
-    printf("%s", buf);
-  } else {
-    strncat(si->message_buffer, buf,
-            sizeof(si->message_buffer) - strlen(si->message_buffer) - 1);
-  }
-
-  if (level == SVC_LOG_ERROR) {
-    si->codec_ctx->err_detail = si->message_buffer;
-  }
-  return retval;
-}
--- a/vpx/svc_context.h
+++ /dev/null
@@ -1,62 +1,0 @@
-/**
- * SvcContext - input parameters and state to encode a multi-layered
- * spatial SVC frame
- */
-
-#ifndef VPX_SVC_CONTEXT_H_
-#define VPX_SVC_CONTEXT_H_
-
-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 enabled;                      // set to non-zero to enable svc encoding
-  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
-
-  // the following lists are ordered from highest resolution to lowest
-  // if the strings are null, default values are used
-  const char* quantizer_values;  // quantizer values, e.g., "27,33,39,53,60"
-  const char* scale_factors;     // layer scale factors, e.g.,
-                                 // "16/16,11/16,7/16,5/16,4/16"
-  int gop_size;                  // distance between keyframes
-
-  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;
-
-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);
-
-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);
-
-void svc_dump_statistics(SvcContext* svc_ctx);
-char* svc_get_message(SvcContext* svc_ctx);
-void* svc_get_buffer(SvcContext* svc_ctx);
-vpx_codec_err_t svc_get_layer_resolution(SvcContext* svc_ctx, int layer,
-                              unsigned int* width, unsigned int* height);
-int svc_get_frame_size(SvcContext* svc_ctx);
-int svc_get_encode_frame_count(SvcContext* svc_ctx);
-int svc_is_keyframe(SvcContext* svc_ctx);
-void svc_set_keyframe(SvcContext* svc_ctx);
-
-#endif /* VPX_SVC_CONTEXT_H_ */
--- a/vpx/vp8cx.h
+++ b/vpx/vp8cx.h
@@ -195,8 +195,13 @@
   VP9E_SET_TILE_ROWS,
   VP9E_SET_FRAME_PARALLEL_DECODING,
 
+  VP9E_SET_WIDTH              = 99,
+  VP9E_SET_HEIGHT,
+  VP9E_SET_LAYER,
   VP9E_SET_SVC,
-  VP9E_SET_SVC_PARAMETERS
+
+  VP9E_SET_MAX_Q,
+  VP9E_SET_MIN_Q
 };
 
 /*!\brief vpx 1-D scaling mode
@@ -278,23 +283,6 @@
   VP8_TUNE_SSIM
 } vp8e_tuning;
 
-/*!\brief  vp9 svc parameters
- *
- * This defines parameters for svc encoding.
- *
- */
-typedef struct vpx_svc_parameters {
-  unsigned int width;         /**<  width of current spatial layer */
-  unsigned int height;        /**< height of current spatial layer */
-  int layer;                  /**< current layer number - 0 = base */
-  int flags;                  /**<  encode frame flags */
-  int max_quantizer;          /**< max quantizer for current layer */
-  int min_quantizer;          /**< min quantizer for current layer */
-  int distance_from_i_frame;  /**< frame number within current gop */
-  int lst_fb_idx;             /**< last frame frame buffer index */
-  int gld_fb_idx;             /**< golden frame frame buffer index */
-  int alt_fb_idx;             /**< alt reference frame frame buffer index */
-} vpx_svc_parameters_t;
 
 /*!\brief VP8 encoder control function parameter type
  *
@@ -315,9 +303,12 @@
 VPX_CTRL_USE_TYPE(VP8E_SET_ACTIVEMAP,          vpx_active_map_t *)
 VPX_CTRL_USE_TYPE(VP8E_SET_SCALEMODE,          vpx_scaling_mode_t *)
 
+VPX_CTRL_USE_TYPE(VP9E_SET_LAYER,              int *)
 VPX_CTRL_USE_TYPE(VP9E_SET_SVC,                int)
-VPX_CTRL_USE_TYPE(VP9E_SET_SVC_PARAMETERS,     vpx_svc_parameters_t *)
 
+VPX_CTRL_USE_TYPE(VP9E_SET_WIDTH,              unsigned int *)
+VPX_CTRL_USE_TYPE(VP9E_SET_HEIGHT,             unsigned int *)
+
 VPX_CTRL_USE_TYPE(VP8E_SET_CPUUSED,            int)
 VPX_CTRL_USE_TYPE(VP8E_SET_ENABLEAUTOALTREF,   unsigned int)
 VPX_CTRL_USE_TYPE(VP8E_SET_NOISE_SENSITIVITY,  unsigned int)
@@ -343,6 +334,8 @@
 
 VPX_CTRL_USE_TYPE(VP9E_SET_FRAME_PARALLEL_DECODING, unsigned int)
 
+VPX_CTRL_USE_TYPE(VP9E_SET_MAX_Q,      unsigned int)
+VPX_CTRL_USE_TYPE(VP9E_SET_MIN_Q,      unsigned int)
 /*! @} - end defgroup vp8_encoder */
 #ifdef __cplusplus
 }  // extern "C"
--- a/vpx/vpx_codec.mk
+++ b/vpx/vpx_codec.mk
@@ -15,8 +15,6 @@
 API_SRCS-$(CONFIG_VP8_ENCODER) += vp8cx.h
 API_DOC_SRCS-$(CONFIG_VP8_ENCODER) += vp8.h
 API_DOC_SRCS-$(CONFIG_VP8_ENCODER) += vp8cx.h
-API_SRCS-$(CONFIG_VP9_ENCODER) += src/svc_encodeframe.c
-API_SRCS-$(CONFIG_VP9_ENCODER) += svc_context.h
 
 API_SRCS-$(CONFIG_VP8_DECODER) += vp8.h
 API_SRCS-$(CONFIG_VP8_DECODER) += vp8dx.h