Various updates to vp8.

Change-Id: Icc7a816491897107764e4c936288e9000e6319b8

2 files changed, 702 insertions, 258 deletions

diff --git a/examples/vp8_multi_resolution_encoder.c b/examples/vp8_multi_resolution_encoder.c
index 9f50dc7cf..e623567b8 100644
--- a/examples/vp8_multi_resolution_encoder.c
+++ b/examples/vp8_multi_resolution_encoder.c
@@ -8,292 +8,730 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+/*
+ * This is an example demonstrating multi-resolution encoding in VP8.
+ * High-resolution input video is down-sampled to lower-resolutions. The
+ * encoder then encodes the video and outputs multiple bitstreams with
+ * different resolutions.
+ *
+ * This test also allows for settings temporal layers for each spatial layer.
+ * Different number of temporal layers per spatial stream may be used.
+ * Currently up to 3 temporal layers per spatial stream (encoder) are supported
+ * in this test.
+ */
 
-// This is an example demonstrating multi-resolution encoding in VP8.
-// High-resolution input video is down-sampled to lower-resolutions. The
-// encoder then encodes the video and outputs multiple bitstreams with
-// different resolutions.
-//
-// Configure with --enable-multi-res-encoding flag to enable this example.
+#include "./vpx_config.h"
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include <string.h>
+#include <math.h>
+#include <assert.h>
+#include <sys/time.h>
+#if USE_POSIX_MMAP
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#endif
+#include "vpx_ports/vpx_timer.h"
+#define VPX_CODEC_DISABLE_COMPAT 1
+#include "vpx/vpx_encoder.h"
+#include "vpx/vp8cx.h"
+#include "vpx_ports/mem_ops.h"
+#include "./tools_common.h"
+#define interface (vpx_codec_vp8_cx())
+#define fourcc    0x30385056
+
+void usage_exit() {
+  exit(EXIT_FAILURE);
+}
+
+/*
+ * The input video frame is downsampled several times to generate a multi-level
+ * hierarchical structure. NUM_ENCODERS is defined as the number of encoding
+ * levels required. For example, if the size of input video is 1280x720,
+ * NUM_ENCODERS is 3, and down-sampling factor is 2, the encoder outputs 3
+ * bitstreams with resolution of 1280x720(level 0), 640x360(level 1), and
+ * 320x180(level 2) respectively.
+ */
+
+/* Number of encoders (spatial resolutions) used in this test. */
+#define NUM_ENCODERS 3
+
+/* Maximum number of temporal layers allowed for this test. */
+#define MAX_NUM_TEMPORAL_LAYERS 3
 
+/* This example uses the scaler function in libyuv. */
 #include "third_party/libyuv/include/libyuv/basic_types.h"
 #include "third_party/libyuv/include/libyuv/scale.h"
 #include "third_party/libyuv/include/libyuv/cpu_id.h"
 
-#include "vpx/vpx_encoder.h"
-#include "vpx/vp8cx.h"
+int (*read_frame_p)(FILE *f, vpx_image_t *img);
 
-#include "./tools_common.h"
-#include "./video_writer.h"
+static int read_frame(FILE *f, vpx_image_t *img) {
+    size_t nbytes, to_read;
+    int    res = 1;
 
-// The input video frame is downsampled several times to generate a
-// multi-level  hierarchical structure. kNumEncoders is defined as the number
-// of encoding  levels required. For example, if the size of input video is
-// 1280x720, kNumEncoders is 3, and down-sampling factor is 2, the encoder
-// outputs 3 bitstreams with resolution of 1280x720(level 0),
-// 640x360(level 1), and 320x180(level 2) respectively.
-#define kNumEncoders 3
+    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 const char *exec_name;
+static int read_frame_by_row(FILE *f, vpx_image_t *img) {
+    size_t nbytes, to_read;
+    int    res = 1;
+    int plane;
 
-void usage_exit() {
-  fprintf(stderr,
-          "Usage: %s <width> <height> <infile> <outfile(s)> <output psnr?>\n",
-          exec_name);
-  exit(EXIT_FAILURE);
+    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;
+
+        /* Determine the correct plane based on the image format. The for-loop
+         * always counts in Y,U,V order, but this may not match the order of
+         * the data on disk.
+         */
+        switch (plane)
+        {
+        case 1:
+            ptr = img->planes[img->fmt==VPX_IMG_FMT_YV12? VPX_PLANE_V : VPX_PLANE_U];
+            break;
+        case 2:
+            ptr = img->planes[img->fmt==VPX_IMG_FMT_YV12?VPX_PLANE_U : 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;
+    }
+
+    return res;
 }
 
-int main(int argc, char *argv[]) {
-  int frame_cnt = 0;
-  FILE *infile = NULL;
-  VpxVideoWriter *writers[kNumEncoders];
-  vpx_codec_ctx_t codec[kNumEncoders];
-  vpx_codec_enc_cfg_t cfg[kNumEncoders];
-  vpx_image_t raw[kNumEncoders];
-  const VpxInterface *const encoder = get_vpx_encoder_by_name("vp8");
-  // Currently, only realtime mode is supported in multi-resolution encoding.
-  const int arg_deadline = VPX_DL_REALTIME;
-  int i;
-  int width = 0;
-  int height = 0;
-  int frame_avail = 0;
-  int got_data = 0;
-
-  // Set show_psnr to 1/0 to show/not show PSNR. Choose show_psnr=0 if you
-  // don't need to know PSNR, which will skip PSNR calculation and save
-  // encoding time.
-  int show_psnr = 0;
-  uint64_t psnr_sse_total[kNumEncoders] = {0};
-  uint64_t psnr_samples_total[kNumEncoders] = {0};
-  double psnr_totals[kNumEncoders][4] = {{0, 0}};
-  int psnr_count[kNumEncoders] = {0};
-
-  // Set the required target bitrates for each resolution level.
-  // If target bitrate for highest-resolution level is set to 0,
-  // (i.e. target_bitrate[0]=0), we skip encoding at that level.
-  unsigned int target_bitrate[kNumEncoders] = {1000, 500, 100};
-
-  // Enter the frame rate of the input video.
-  const int framerate = 30;
-  // Set down-sampling factor for each resolution level.
-  //   dsf[0] controls down sampling from level 0 to level 1;
-  //   dsf[1] controls down sampling from level 1 to level 2;
-  //   dsf[2] is not used.
-  vpx_rational_t dsf[kNumEncoders] = {{2, 1}, {2, 1}, {1, 1}};
-
-  exec_name = argv[0];
-
-  if (!encoder)
-    die("Unsupported codec.");
-
-  // exe_name, input width, input height, input file,
-  // output file 1, output file 2, output file 3, psnr on/off
-  if (argc != (5 + kNumEncoders))
-    die("Invalid number of input options.");
-
-  printf("Using %s\n", vpx_codec_iface_name(encoder->codec_interface()));
-
-  width = strtol(argv[1], NULL, 0);
-  height = strtol(argv[2], NULL, 0);
-
-  if (width < 16 || width % 2 || height < 16 || height % 2)
-    die("Invalid resolution: %ldx%ld", width, height);
-
-  // Open input video file for encoding
-  if (!(infile = fopen(argv[3], "rb")))
-    die("Failed to open %s for reading", argv[3]);
-
-  show_psnr = strtol(argv[kNumEncoders + 4], NULL, 0);
-
-  // Populate default encoder configuration
-  for (i = 0; i < kNumEncoders; ++i) {
-    vpx_codec_err_t res =
-        vpx_codec_enc_config_default(encoder->codec_interface(), &cfg[i], 0);
-    if (res != VPX_CODEC_OK) {
-      printf("Failed to get config: %s\n", vpx_codec_err_to_string(res));
-      return EXIT_FAILURE;
+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, 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,
+                                   const vpx_codec_cx_pkt_t *pkt)
+{
+    char             header[12];
+    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);
+
+    (void) fwrite(header, 1, 12, outfile);
+}
+
+/* Temporal scaling parameters */
+/* This sets all the temporal layer parameters given |num_temporal_layers|,
+ * including the target bit allocation across temporal layers. Bit allocation
+ * parameters will be passed in as user parameters in another version.
+ */
+static void set_temporal_layer_pattern(int num_temporal_layers,
+                                       vpx_codec_enc_cfg_t *cfg,
+                                       int bitrate,
+                                       int *layer_flags)
+{
+    assert(num_temporal_layers <= MAX_NUM_TEMPORAL_LAYERS);
+    switch (num_temporal_layers)
+    {
+    case 1:
+    {
+        /* 1-layer */
+        cfg->ts_number_layers     = 1;
+        cfg->ts_periodicity       = 1;
+        cfg->ts_rate_decimator[0] = 1;
+        cfg->ts_layer_id[0] = 0;
+        cfg->ts_target_bitrate[0] = bitrate;
+
+        // Update L only.
+        layer_flags[0] = VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF;
+        break;
+    }
+
+    case 2:
+    {
+        /* 2-layers, with sync point at first frame of layer 1. */
+        cfg->ts_number_layers     = 2;
+        cfg->ts_periodicity       = 2;
+        cfg->ts_rate_decimator[0] = 2;
+        cfg->ts_rate_decimator[1] = 1;
+        cfg->ts_layer_id[0] = 0;
+        cfg->ts_layer_id[1] = 1;
+        // Use 60/40 bit allocation as example.
+        cfg->ts_target_bitrate[0] = 0.6f * bitrate;
+        cfg->ts_target_bitrate[1] = bitrate;
+
+        /* 0=L, 1=GF */
+        // ARF is used as predictor for all frames, and is only updated on
+        // key frame. Sync point every 8 frames.
+
+        // Layer 0: predict from L and ARF, update L and G.
+        layer_flags[0] = VP8_EFLAG_NO_REF_GF |
+                         VP8_EFLAG_NO_UPD_ARF;
+
+        // Layer 1: sync point: predict from L and ARF, and update G.
+        layer_flags[1] = VP8_EFLAG_NO_REF_GF |
+                         VP8_EFLAG_NO_UPD_LAST |
+                         VP8_EFLAG_NO_UPD_ARF;
+
+        // Layer 0, predict from L and ARF, update L.
+        layer_flags[2] = VP8_EFLAG_NO_REF_GF  |
+                         VP8_EFLAG_NO_UPD_GF  |
+                         VP8_EFLAG_NO_UPD_ARF;
+
+        // Layer 1: predict from L, G and ARF, and update G.
+        layer_flags[3] = VP8_EFLAG_NO_UPD_ARF |
+                         VP8_EFLAG_NO_UPD_LAST |
+                         VP8_EFLAG_NO_UPD_ENTROPY;
+
+        // Layer 0
+        layer_flags[4] = layer_flags[2];
+
+        // Layer 1
+        layer_flags[5] = layer_flags[3];
+
+        // Layer 0
+        layer_flags[6] = layer_flags[4];
+
+        // Layer 1
+        layer_flags[7] = layer_flags[5];
+        break;
     }
-  }
-
-  // Update the default configuration according to needs of the application.
-  // Highest-resolution encoder settings
-  cfg[0].g_w = width;
-  cfg[0].g_h = height;
-  cfg[0].g_threads = 1;
-  cfg[0].rc_dropframe_thresh = 30;
-  cfg[0].rc_end_usage = VPX_CBR;
-  cfg[0].rc_resize_allowed = 0;
-  cfg[0].rc_min_quantizer = 4;
-  cfg[0].rc_max_quantizer = 56;
-  cfg[0].rc_undershoot_pct = 98;
-  cfg[0].rc_overshoot_pct = 100;
-  cfg[0].rc_buf_initial_sz = 500;
-  cfg[0].rc_buf_optimal_sz = 600;
-  cfg[0].rc_buf_sz = 1000;
-  cfg[0].g_error_resilient = 1;
-  cfg[0].g_lag_in_frames = 0;
-  cfg[0].kf_mode = VPX_KF_AUTO;  // VPX_KF_DISABLED
-  cfg[0].kf_min_dist = 3000;
-  cfg[0].kf_max_dist = 3000;
-  cfg[0].rc_target_bitrate = target_bitrate[0];
-  cfg[0].g_timebase.num = 1;
-  cfg[0].g_timebase.den = framerate;
-
-  // Other-resolution encoder settings
-  for (i = 1; i < kNumEncoders; ++i) {
-    cfg[i] = cfg[0];
-    cfg[i].g_threads = 1;
-    cfg[i].rc_target_bitrate = target_bitrate[i];
-
-    // Note: Width & height of other-resolution encoders are calculated
-    // from the highest-resolution encoder's size and the corresponding
-    // down_sampling_factor.
+
+    case 3:
+    default:
     {
-      unsigned int iw = cfg[i - 1].g_w * dsf[i - 1].den + dsf[i - 1].num - 1;
-      unsigned int ih = cfg[i - 1].g_h * dsf[i - 1].den + dsf[i - 1].num - 1;
-      cfg[i].g_w = iw / dsf[i - 1].num;
-      cfg[i].g_h = ih / dsf[i - 1].num;
+        // 3-layers structure where ARF is used as predictor for all frames,
+        // and is only updated on key frame.
+        // Sync points for layer 1 and 2 every 8 frames.
+        cfg->ts_number_layers     = 3;
+        cfg->ts_periodicity       = 4;
+        cfg->ts_rate_decimator[0] = 4;
+        cfg->ts_rate_decimator[1] = 2;
+        cfg->ts_rate_decimator[2] = 1;
+        cfg->ts_layer_id[0] = 0;
+        cfg->ts_layer_id[1] = 2;
+        cfg->ts_layer_id[2] = 1;
+        cfg->ts_layer_id[3] = 2;
+        // Use 40/20/40 bit allocation as example.
+        cfg->ts_target_bitrate[0] = 0.4f * bitrate;
+        cfg->ts_target_bitrate[1] = 0.6f * bitrate;
+        cfg->ts_target_bitrate[2] = bitrate;
+
+        /* 0=L, 1=GF, 2=ARF */
+
+        // Layer 0: predict from L and ARF; update L and G.
+        layer_flags[0] =  VP8_EFLAG_NO_UPD_ARF |
+                          VP8_EFLAG_NO_REF_GF;
+
+        // Layer 2: sync point: predict from L and ARF; update none.
+        layer_flags[1] = VP8_EFLAG_NO_REF_GF |
+                         VP8_EFLAG_NO_UPD_GF |
+                         VP8_EFLAG_NO_UPD_ARF |
+                         VP8_EFLAG_NO_UPD_LAST |
+                         VP8_EFLAG_NO_UPD_ENTROPY;
+
+        // Layer 1: sync point: predict from L and ARF; update G.
+        layer_flags[2] = VP8_EFLAG_NO_REF_GF |
+                         VP8_EFLAG_NO_UPD_ARF |
+                         VP8_EFLAG_NO_UPD_LAST;
+
+        // Layer 2: predict from L, G, ARF; update none.
+        layer_flags[3] = VP8_EFLAG_NO_UPD_GF |
+                         VP8_EFLAG_NO_UPD_ARF |
+                         VP8_EFLAG_NO_UPD_LAST |
+                         VP8_EFLAG_NO_UPD_ENTROPY;
+
+        // Layer 0: predict from L and ARF; update L.
+        layer_flags[4] = VP8_EFLAG_NO_UPD_GF |
+                         VP8_EFLAG_NO_UPD_ARF |
+                         VP8_EFLAG_NO_REF_GF;
+
+        // Layer 2: predict from L, G, ARF; update none.
+        layer_flags[5] = layer_flags[3];
+
+        // Layer 1: predict from L, G, ARF; update G.
+        layer_flags[6] = VP8_EFLAG_NO_UPD_ARF |
+                         VP8_EFLAG_NO_UPD_LAST;
+
+        // Layer 2: predict from L, G, ARF; update none.
+        layer_flags[7] = layer_flags[3];
+        break;
+    }
     }
+}
+
+/* The periodicity of the pattern given the number of temporal layers. */
+static int periodicity_to_num_layers[MAX_NUM_TEMPORAL_LAYERS] = {1, 8, 8};
+
+int main(int argc, char **argv)
+{
+    FILE                 *infile, *outfile[NUM_ENCODERS];
+    FILE                 *downsampled_input[NUM_ENCODERS - 1];
+    char                 filename[50];
+    vpx_codec_ctx_t      codec[NUM_ENCODERS];
+    vpx_codec_enc_cfg_t  cfg[NUM_ENCODERS];
+    int                  frame_cnt = 0;
+    vpx_image_t          raw[NUM_ENCODERS];
+    vpx_codec_err_t      res[NUM_ENCODERS];
+
+    int                  i;
+    long                 width;
+    long                 height;
+    int                  length_frame;
+    int                  frame_avail;
+    int                  got_data;
+    int                  flags = 0;
+    int                  layer_id = 0;
+
+    int                  layer_flags[VPX_TS_MAX_PERIODICITY * NUM_ENCODERS]
+                                     = {0};
+    int                  flag_periodicity;
+
+    /*Currently, only realtime mode is supported in multi-resolution encoding.*/
+    int                  arg_deadline = VPX_DL_REALTIME;
+
+    /* Set show_psnr to 1/0 to show/not show PSNR. Choose show_psnr=0 if you
+       don't need to know PSNR, which will skip PSNR calculation and save
+       encoding time. */
+    int                  show_psnr = 0;
+    int                  key_frame_insert = 0;
+    uint64_t             psnr_sse_total[NUM_ENCODERS] = {0};
+    uint64_t             psnr_samples_total[NUM_ENCODERS] = {0};
+    double               psnr_totals[NUM_ENCODERS][4] = {{0,0}};
+    int                  psnr_count[NUM_ENCODERS] = {0};
+
+    double               cx_time = 0;
+    struct  timeval      tv1, tv2, difftv;
+
+    /* Set the required target bitrates for each resolution level.
+     * If target bitrate for highest-resolution level is set to 0,
+     * (i.e. target_bitrate[0]=0), we skip encoding at that level.
+     */
+    unsigned int         target_bitrate[NUM_ENCODERS]={1000, 500, 100};
+
+    /* Enter the frame rate of the input video */
+    int                  framerate = 30;
+
+    /* Set down-sampling factor for each resolution level.
+       dsf[0] controls down sampling from level 0 to level 1;
+       dsf[1] controls down sampling from level 1 to level 2;
+       dsf[2] is not used. */
+    vpx_rational_t dsf[NUM_ENCODERS] = {{2, 1}, {2, 1}, {1, 1}};
+
+    /* Set the number of temporal layers for each encoder/resolution level,
+     * starting from highest resoln down to lowest resoln. */
+    unsigned int         num_temporal_layers[NUM_ENCODERS] = {3, 3, 3};
+
+    if(argc!= (7 + 3 * NUM_ENCODERS))
+        die("Usage: %s <width> <height> <frame_rate>  <infile> <outfile(s)> "
+            "<rate_encoder(s)> <temporal_layer(s)> <key_frame_insert> <output psnr?> \n",
+            argv[0]);
+
+    printf("Using %s\n",vpx_codec_iface_name(interface));
+
+    width = strtol(argv[1], NULL, 0);
+    height = strtol(argv[2], NULL, 0);
+    framerate = strtol(argv[3], NULL, 0);
+
+    if(width < 16 || width%2 || height <16 || height%2)
+        die("Invalid resolution: %ldx%ld", width, height);
+
+    /* Open input video file for encoding */
+    if(!(infile = fopen(argv[4], "rb")))
+        die("Failed to open %s for reading", argv[4]);
+
+    /* Open output file for each encoder to output bitstreams */
+    for (i=0; i< NUM_ENCODERS; i++)
+    {
+        if(!target_bitrate[i])
+        {
+            outfile[i] = NULL;
+            continue;
+        }
 
-    // Make width & height to be multiplier of 2.
-    if ((cfg[i].g_w) % 2)
-      cfg[i].g_w++;
-
-    if ((cfg[i].g_h) % 2)
-      cfg[i].g_h++;
-  }
-
-  // Open output file for each encoder to output bitstreams
-  for (i = 0; i < kNumEncoders; ++i) {
-    VpxVideoInfo info = {
-      encoder->fourcc,
-      cfg[i].g_w,
-      cfg[i].g_h,
-      {cfg[i].g_timebase.num, cfg[i].g_timebase.den}
-    };
-
-    if (!(writers[i] = vpx_video_writer_open(argv[i+4], kContainerIVF, &info)))
-      die("Failed to open %s for writing", argv[i+4]);
-  }
-
-  // Allocate image for each encoder
-  for (i = 0; i < kNumEncoders; ++i)
-    if (!vpx_img_alloc(&raw[i], VPX_IMG_FMT_I420, cfg[i].g_w, cfg[i].g_h, 32))
-      die("Failed to allocate image", cfg[i].g_w, cfg[i].g_h);
-
-  // Initialize multi-encoder
-  if (vpx_codec_enc_init_multi(&codec[0], encoder->codec_interface(), &cfg[0],
-                               kNumEncoders,
-                               show_psnr ? VPX_CODEC_USE_PSNR : 0, &dsf[0]))
-    die_codec(&codec[0], "Failed to initialize encoder");
-
-  // The extra encoding configuration parameters can be set as follows.
-  for (i = 0; i < kNumEncoders; i++) {
-    // Set encoding speed
-    if (vpx_codec_control(&codec[i], VP8E_SET_CPUUSED, -6))
-      die_codec(&codec[i], "Failed to set cpu_used");
-
-    // Set static threshold.
-    if (vpx_codec_control(&codec[i], VP8E_SET_STATIC_THRESHOLD, 1))
-      die_codec(&codec[i], "Failed to set static threshold");
-
-    // Set NOISE_SENSITIVITY to do TEMPORAL_DENOISING
-    // Enable denoising for the highest-resolution encoder.
-    if (vpx_codec_control(&codec[0], VP8E_SET_NOISE_SENSITIVITY, i == 0))
-      die_codec(&codec[0], "Failed to set noise_sensitivity");
-  }
-
-  frame_avail = 1;
-  got_data = 0;
-
-  while (frame_avail || got_data) {
-    vpx_codec_iter_t iter[kNumEncoders] = {NULL};
-    const vpx_codec_cx_pkt_t *pkt[kNumEncoders];
-
-    frame_avail = vpx_img_read(&raw[0], infile);
-
-    if (frame_avail) {
-      for (i = 1; i < kNumEncoders; ++i) {
-        vpx_image_t *const prev = &raw[i - 1];
-
-        // Scale the image down a number of times by downsampling factor
-        // FilterMode 1 or 2 give better psnr than FilterMode 0.
-        I420Scale(prev->planes[VPX_PLANE_Y], prev->stride[VPX_PLANE_Y],
-                  prev->planes[VPX_PLANE_U], prev->stride[VPX_PLANE_U],
-                  prev->planes[VPX_PLANE_V], prev->stride[VPX_PLANE_V],
-                  prev->d_w, prev->d_h,
-                  raw[i].planes[VPX_PLANE_Y], raw[i].stride[VPX_PLANE_Y],
-                  raw[i].planes[VPX_PLANE_U], raw[i].stride[VPX_PLANE_U],
-                  raw[i].planes[VPX_PLANE_V], raw[i].stride[VPX_PLANE_V],
-                  raw[i].d_w, raw[i].d_h, 1);
-      }
+        if(!(outfile[i] = fopen(argv[i+5], "wb")))
+            die("Failed to open %s for writing", argv[i+4]);
     }
 
-    // Encode frame.
-    if (vpx_codec_encode(&codec[0], frame_avail? &raw[0] : NULL,
-                         frame_cnt, 1, 0, arg_deadline)) {
-      die_codec(&codec[0], "Failed to encode frame");
+    // Bitrates per spatial layer: overwrite default rates above.
+    for (i=0; i< NUM_ENCODERS; i++)
+    {
+        target_bitrate[i] = strtol(argv[NUM_ENCODERS + 5 + i], NULL, 0);
     }
 
-    for (i = kNumEncoders - 1; i >= 0; i--) {
-      got_data = 0;
-
-      while ((pkt[i] = vpx_codec_get_cx_data(&codec[i], &iter[i]))) {
-        got_data = 1;
-        switch (pkt[i]->kind) {
-          case VPX_CODEC_CX_FRAME_PKT:
-            vpx_video_writer_write_frame(writers[i], pkt[i]->data.frame.buf,
-                                         pkt[i]->data.frame.sz, frame_cnt - 1);
-          break;
-          case VPX_CODEC_PSNR_PKT:
-            if (show_psnr) {
-              int j;
-              psnr_sse_total[i] += pkt[i]->data.psnr.sse[0];
-              psnr_samples_total[i] += pkt[i]->data.psnr.samples[0];
-              for (j = 0; j < 4; j++)
-                psnr_totals[i][j] += pkt[i]->data.psnr.psnr[j];
-              psnr_count[i]++;
-            }
-            break;
-          default:
-            break;
+    // Temporal layers per spatial layers: overwrite default settings above.
+    for (i=0; i< NUM_ENCODERS; i++)
+    {
+        num_temporal_layers[i] = strtol(argv[2 * NUM_ENCODERS + 5 + i], NULL, 0);
+        if (num_temporal_layers[i] < 1 || num_temporal_layers[i] > 3)
+          die("Invalid temporal layers: %d, Must be 1, 2, or 3. \n",
+              num_temporal_layers);
+    }
+
+    /* Open file to write out each spatially downsampled input stream. */
+    for (i=0; i< NUM_ENCODERS - 1; i++)
+    {
+       // Highest resoln is encoder 0.
+        if (sprintf(filename,"ds%d.yuv",NUM_ENCODERS - i) < 0)
+        {
+            return EXIT_FAILURE;
+        }
+        downsampled_input[i] = fopen(filename,"wb");
+    }
+
+    key_frame_insert = strtol(argv[3 * NUM_ENCODERS + 5], NULL, 0);
+
+    show_psnr = strtol(argv[3 * NUM_ENCODERS + 6], NULL, 0);
+
+
+    /* Populate default encoder configuration */
+    for (i=0; i< NUM_ENCODERS; i++)
+    {
+        res[i] = vpx_codec_enc_config_default(interface, &cfg[i], 0);
+        if(res[i]) {
+            printf("Failed to get config: %s\n", vpx_codec_err_to_string(res[i]));
+            return EXIT_FAILURE;
         }
-        printf(pkt[i]->kind == VPX_CODEC_CX_FRAME_PKT &&
-               (pkt[i]->data.frame.flags & VPX_FRAME_IS_KEY)? "K":".");
-        fflush(stdout);
-      }
     }
-    frame_cnt++;
-  }
-  printf("\n");
-
-  fclose(infile);
-
-  printf("Processed %d frames.\n", frame_cnt - 1);
-  for (i = 0; i < kNumEncoders; ++i) {
-    // Calculate PSNR and print it out
-    if (show_psnr && psnr_count[i] > 0) {
-      int j;
-      double ovpsnr = sse_to_psnr(psnr_samples_total[i], 255.0,
-                                  psnr_sse_total[i]);
-
-      fprintf(stderr, "\n ENC%d PSNR (Overall/Avg/Y/U/V)", i);
-      fprintf(stderr, " %.3lf", ovpsnr);
-      for (j = 0; j < 4; j++)
-        fprintf(stderr, " %.3lf", psnr_totals[i][j]/psnr_count[i]);
+
+    /*
+     * Update the default configuration according to needs of the application.
+     */
+    /* Highest-resolution encoder settings */
+    cfg[0].g_w = width;
+    cfg[0].g_h = height;
+    cfg[0].rc_dropframe_thresh = 0;
+    cfg[0].rc_end_usage = VPX_CBR;
+    cfg[0].rc_resize_allowed = 0;
+    cfg[0].rc_min_quantizer = 2;
+    cfg[0].rc_max_quantizer = 56;
+    cfg[0].rc_undershoot_pct = 100;
+    cfg[0].rc_overshoot_pct = 15;
+    cfg[0].rc_buf_initial_sz = 500;
+    cfg[0].rc_buf_optimal_sz = 600;
+    cfg[0].rc_buf_sz = 1000;
+    cfg[0].g_error_resilient = 1;              /* Enable error resilient mode */
+    cfg[0].g_lag_in_frames   = 0;
+
+    /* Disable automatic keyframe placement */
+    /* Note: These 3 settings are copied to all levels. But, except the lowest
+     * resolution level, all other levels are set to VPX_KF_DISABLED internally.
+     */
+    cfg[0].kf_mode           = VPX_KF_AUTO;
+    cfg[0].kf_min_dist = 3000;
+    cfg[0].kf_max_dist = 3000;
+
+    cfg[0].rc_target_bitrate = target_bitrate[0];       /* Set target bitrate */
+    cfg[0].g_timebase.num = 1;                          /* Set fps */
+    cfg[0].g_timebase.den = framerate;
+
+    /* Other-resolution encoder settings */
+    for (i=1; i< NUM_ENCODERS; i++)
+    {
+        memcpy(&cfg[i], &cfg[0], sizeof(vpx_codec_enc_cfg_t));
+
+        cfg[i].rc_target_bitrate = target_bitrate[i];
+
+        /* Note: Width & height of other-resolution encoders are calculated
+         * from the highest-resolution encoder's size and the corresponding
+         * down_sampling_factor.
+         */
+        {
+            unsigned int iw = cfg[i-1].g_w*dsf[i-1].den + dsf[i-1].num - 1;
+            unsigned int ih = cfg[i-1].g_h*dsf[i-1].den + dsf[i-1].num - 1;
+            cfg[i].g_w = iw/dsf[i-1].num;
+            cfg[i].g_h = ih/dsf[i-1].num;
+        }
+
+        /* Make width & height to be multiplier of 2. */
+        // Should support odd size ???
+        if((cfg[i].g_w)%2)cfg[i].g_w++;
+        if((cfg[i].g_h)%2)cfg[i].g_h++;
+    }
+
+
+    // Set the number of threads per encode/spatial layer.
+    // (1, 1, 1) means no encoder threading.
+    cfg[0].g_threads = 2;
+    cfg[1].g_threads = 1;
+    cfg[2].g_threads = 1;
+
+    /* Allocate image for each encoder */
+    for (i=0; i< NUM_ENCODERS; i++)
+        if(!vpx_img_alloc(&raw[i], VPX_IMG_FMT_I420, cfg[i].g_w, cfg[i].g_h, 32))
+            die("Failed to allocate image", cfg[i].g_w, cfg[i].g_h);
+
+    if (raw[0].stride[VPX_PLANE_Y] == raw[0].d_w)
+        read_frame_p = read_frame;
+    else
+        read_frame_p = read_frame_by_row;
+
+    for (i=0; i< NUM_ENCODERS; i++)
+        if(outfile[i])
+            write_ivf_file_header(outfile[i], &cfg[i], 0);
+
+    /* Temporal layers settings */
+    for ( i=0; i<NUM_ENCODERS; i++)
+    {
+        set_temporal_layer_pattern(num_temporal_layers[i],
+                                   &cfg[i],
+                                   cfg[i].rc_target_bitrate,
+                                   &layer_flags[i * VPX_TS_MAX_PERIODICITY]);
+    }
+
+    /* Initialize multi-encoder */
+    if(vpx_codec_enc_init_multi(&codec[0], interface, &cfg[0], NUM_ENCODERS,
+                                (show_psnr ? VPX_CODEC_USE_PSNR : 0), &dsf[0]))
+        die_codec(&codec[0], "Failed to initialize encoder");
+
+    /* The extra encoding configuration parameters can be set as follows. */
+    /* Set encoding speed */
+    for ( i=0; i<NUM_ENCODERS; i++)
+    {
+        int speed = -6;
+        /* Lower speed for the lowest resolution. */
+        if (i == NUM_ENCODERS - 1) speed = -4;
+        if(vpx_codec_control(&codec[i], VP8E_SET_CPUUSED, speed))
+            die_codec(&codec[i], "Failed to set cpu_used");
     }
 
-    if (vpx_codec_destroy(&codec[i]))
-      die_codec(&codec[i], "Failed to destroy codec");
+    /* Set static threshold = 1 for all encoders */
+    for ( i=0; i<NUM_ENCODERS; i++)
+    {
+        if(vpx_codec_control(&codec[i], VP8E_SET_STATIC_THRESHOLD, 1))
+            die_codec(&codec[i], "Failed to set static threshold");
+    }
 
-    vpx_img_free(&raw[i]);
-    vpx_video_writer_close(writers[i]);
-  }
-  printf("\n");
+    /* Set NOISE_SENSITIVITY to do TEMPORAL_DENOISING */
+    /* Enable denoising for the highest-resolution encoder. */
+    if(vpx_codec_control(&codec[0], VP8E_SET_NOISE_SENSITIVITY, 1))
+        die_codec(&codec[0], "Failed to set noise_sensitivity");
+    for ( i=1; i< NUM_ENCODERS; i++)
+    {
+        if(vpx_codec_control(&codec[i], VP8E_SET_NOISE_SENSITIVITY, 0))
+            die_codec(&codec[i], "Failed to set noise_sensitivity");
+    }
+
+    /* Set the number of token partitions */
+    for ( i=0; i<NUM_ENCODERS; i++)
+    {
+        if(vpx_codec_control(&codec[i], VP8E_SET_TOKEN_PARTITIONS, 1))
+            die_codec(&codec[i], "Failed to set static threshold");
+    }
+
+    /* Set the max intra target bitrate */
+    for ( i=0; i<NUM_ENCODERS; i++)
+    {
+        unsigned int max_intra_size_pct =
+            (int)(((double)cfg[0].rc_buf_optimal_sz * 0.5) * framerate / 10);
+        if(vpx_codec_control(&codec[i], VP8E_SET_MAX_INTRA_BITRATE_PCT,
+                             max_intra_size_pct))
+            die_codec(&codec[i], "Failed to set static threshold");
+       //printf("%d %d \n",i,max_intra_size_pct);
+    }
+
+    frame_avail = 1;
+    got_data = 0;
+
+    while(frame_avail || got_data)
+    {
+        vpx_codec_iter_t iter[NUM_ENCODERS]={NULL};
+        const vpx_codec_cx_pkt_t *pkt[NUM_ENCODERS];
+
+        flags = 0;
+        frame_avail = read_frame_p(infile, &raw[0]);
+
+        if(frame_avail)
+        {
+            for ( i=1; i<NUM_ENCODERS; i++)
+            {
+                /*Scale the image down a number of times by downsampling factor*/
+                /* FilterMode 1 or 2 give better psnr than FilterMode 0. */
+                I420Scale(raw[i-1].planes[VPX_PLANE_Y], raw[i-1].stride[VPX_PLANE_Y],
+                          raw[i-1].planes[VPX_PLANE_U], raw[i-1].stride[VPX_PLANE_U],
+                          raw[i-1].planes[VPX_PLANE_V], raw[i-1].stride[VPX_PLANE_V],
+                          raw[i-1].d_w, raw[i-1].d_h,
+                          raw[i].planes[VPX_PLANE_Y], raw[i].stride[VPX_PLANE_Y],
+                          raw[i].planes[VPX_PLANE_U], raw[i].stride[VPX_PLANE_U],
+                          raw[i].planes[VPX_PLANE_V], raw[i].stride[VPX_PLANE_V],
+                          raw[i].d_w, raw[i].d_h, 1);
+                /* Write out down-sampled input. */
+                length_frame = cfg[i].g_w *  cfg[i].g_h *3/2;
+                if (fwrite(raw[i].planes[0], 1, length_frame,
+                           downsampled_input[NUM_ENCODERS - i - 1]) !=
+                               length_frame)
+                {
+                    return EXIT_FAILURE;
+                }
+            }
+        }
+
+        /* Set the flags (reference and update) for all the encoders.*/
+        for ( i=0; i<NUM_ENCODERS; i++)
+        {
+            layer_id = cfg[i].ts_layer_id[frame_cnt % cfg[i].ts_periodicity];
+            flags = 0;
+            flag_periodicity = periodicity_to_num_layers
+                [num_temporal_layers[i] - 1];
+            flags = layer_flags[i * VPX_TS_MAX_PERIODICITY +
+                                frame_cnt % flag_periodicity];
+            // Key frame flag for first frame.
+            if (frame_cnt == 0)
+            {
+                flags |= VPX_EFLAG_FORCE_KF;
+            }
+            if (frame_cnt > 0 && frame_cnt == key_frame_insert)
+            {
+                flags = VPX_EFLAG_FORCE_KF;
+            }
+
+            vpx_codec_control(&codec[i], VP8E_SET_FRAME_FLAGS, flags);
+            vpx_codec_control(&codec[i], VP8E_SET_TEMPORAL_LAYER_ID, layer_id);
+        }
+
+        gettimeofday(&tv1, NULL);
+        /* Encode each frame at multi-levels */
+        /* Note the flags must be set to 0 in the encode call if they are set
+           for each frame with the vpx_codec_control(), as done above. */
+        if(vpx_codec_encode(&codec[0], frame_avail? &raw[0] : NULL,
+            frame_cnt, 1, 0, arg_deadline))
+        {
+            die_codec(&codec[0], "Failed to encode frame");
+        }
+        gettimeofday(&tv2, NULL);
+        timersub(&tv2, &tv1, &difftv);
+        cx_time += (double)(difftv.tv_sec * 1000000 + difftv.tv_usec);
+        for (i=NUM_ENCODERS-1; i>=0 ; i--)
+        {
+            got_data = 0;
+            while( (pkt[i] = vpx_codec_get_cx_data(&codec[i], &iter[i])) )
+            {
+                got_data = 1;
+                switch(pkt[i]->kind) {
+                    case VPX_CODEC_CX_FRAME_PKT:
+                        write_ivf_frame_header(outfile[i], pkt[i]);
+                        (void) fwrite(pkt[i]->data.frame.buf, 1,
+                                      pkt[i]->data.frame.sz, outfile[i]);
+                    break;
+                    case VPX_CODEC_PSNR_PKT:
+                        if (show_psnr)
+                        {
+                            int j;
+
+                            psnr_sse_total[i] += pkt[i]->data.psnr.sse[0];
+                            psnr_samples_total[i] += pkt[i]->data.psnr.samples[0];
+                            for (j = 0; j < 4; j++)
+                            {
+                                psnr_totals[i][j] += pkt[i]->data.psnr.psnr[j];
+                            }
+                            psnr_count[i]++;
+                        }
+
+                        break;
+                    default:
+                        break;
+                }
+                printf(pkt[i]->kind == VPX_CODEC_CX_FRAME_PKT
+                       && (pkt[i]->data.frame.flags & VPX_FRAME_IS_KEY)? "K":"");
+                fflush(stdout);
+            }
+        }
+        frame_cnt++;
+    }
+    printf("\n");
+    printf("FPS for encoding %d %f %f \n", frame_cnt, (float)cx_time / 1000000,
+           1000000 * (double)frame_cnt / (double)cx_time);
+
+    fclose(infile);
+
+    printf("Processed %ld frames.\n",(long int)frame_cnt-1);
+    for (i=0; i< NUM_ENCODERS; i++)
+    {
+        /* Calculate PSNR and print it out */
+        if ( (show_psnr) && (psnr_count[i]>0) )
+        {
+            int j;
+            double ovpsnr = sse_to_psnr(psnr_samples_total[i], 255.0,
+                                        psnr_sse_total[i]);
+
+            fprintf(stderr, "\n ENC%d PSNR (Overall/Avg/Y/U/V)", i);
+
+            fprintf(stderr, " %.3lf", ovpsnr);
+            for (j = 0; j < 4; j++)
+            {
+                fprintf(stderr, " %.3lf", psnr_totals[i][j]/psnr_count[i]);
+            }
+        }
+
+        if(vpx_codec_destroy(&codec[i]))
+            die_codec(&codec[i], "Failed to destroy codec");
+
+        vpx_img_free(&raw[i]);
+
+        if(!outfile[i])
+            continue;
+
+        /* Try to rewrite the file header with the actual frame count */
+        if(!fseek(outfile[i], 0, SEEK_SET))
+            write_ivf_file_header(outfile[i], &cfg[i], frame_cnt-1);
+        fclose(outfile[i]);
+    }
+    printf("\n");
 
-  return EXIT_SUCCESS;
+    return EXIT_SUCCESS;
 }
diff --git a/examples/vpx_temporal_svc_encoder.c b/examples/vpx_temporal_svc_encoder.c
index 8cc7f4a95..cbe0157ff 100644
--- a/examples/vpx_temporal_svc_encoder.c
+++ b/examples/vpx_temporal_svc_encoder.c
@@ -675,6 +675,9 @@ int main(int argc, char **argv) {
         die_codec(&codec, "Failed to set SVC");
     }
   }
+  if (strncmp(encoder->name, "vp8", 3) == 0) {
+    vpx_codec_control(&codec, VP8E_SET_SCREEN_CONTENT_MODE, 0);
+  }
   vpx_codec_control(&codec, VP8E_SET_STATIC_THRESHOLD, 1);
   vpx_codec_control(&codec, VP8E_SET_TOKEN_PARTITIONS, 1);
   // This controls the maximum target size of the key frame.
@@ -697,6 +700,9 @@ int main(int argc, char **argv) {
         cfg.ts_layer_id[frame_cnt % cfg.ts_periodicity];
     if (strncmp(encoder->name, "vp9", 3) == 0) {
       vpx_codec_control(&codec, VP9E_SET_SVC_LAYER_ID, &layer_id);
+    } else if (strncmp(encoder->name, "vp8", 3) == 0) {
+      vpx_codec_control(&codec, VP8E_SET_TEMPORAL_LAYER_ID,
+                        layer_id.temporal_layer_id);
     }
     flags = layer_flags[frame_cnt % flag_periodicity];
     frame_avail = vpx_img_read(&raw, infile);