libvpx: Pull from upstream

source/libvpx/examples/vp9_spatial_scalable_encoder.c

+/*
+ *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+/*
+ * This is an example demonstrating how to implement a multi-layer
+ * VP9 encoding scheme based on spatial scalability for video applications
+ * that benefit from a scalable bitstream.
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "./args.h"
+#include "./tools_common.h"
+#include "./video_writer.h"
+
+#include "vpx/svc_context.h"
+#include "vpx/vp8cx.h"
+#include "vpx/vpx_encoder.h"
+
+static const struct arg_enum_list encoding_mode_enum[] = {
+  {"i", INTER_LAYER_PREDICTION_I},
+  {"alt-ip", ALT_INTER_LAYER_PREDICTION_IP},
+  {"ip", INTER_LAYER_PREDICTION_IP},
+  {"gf", USE_GOLDEN_FRAME},
+  {NULL, 0}
+};
+
+static const arg_def_t encoding_mode_arg = ARG_DEF_ENUM(
+    "m", "encoding-mode", 1, "Encoding mode algorithm", encoding_mode_enum);
+static const arg_def_t skip_frames_arg =
+    ARG_DEF("s", "skip-frames", 1, "input frames to skip");
+static const arg_def_t frames_arg =
+    ARG_DEF("f", "frames", 1, "number of frames to encode");
+static const arg_def_t width_arg = ARG_DEF("w", "width", 1, "source width");
+static const arg_def_t height_arg = ARG_DEF("h", "height", 1, "source height");
+static const arg_def_t timebase_arg =
+    ARG_DEF("t", "timebase", 1, "timebase (num/den)");
+static const arg_def_t bitrate_arg = ARG_DEF(
+    "b", "target-bitrate", 1, "encoding bitrate, in kilobits per second");
+static const arg_def_t layers_arg =
+    ARG_DEF("l", "layers", 1, "number of SVC layers");
+static const arg_def_t kf_dist_arg =
+    ARG_DEF("k", "kf-dist", 1, "number of frames between keyframes");
+static const arg_def_t scale_factors_arg =
+    ARG_DEF("r", "scale-factors", 1, "scale factors (lowest to highest layer)");
+static const arg_def_t quantizers_arg =
+    ARG_DEF("q", "quantizers", 1, "quantizers for non key frames, also will "
+            "be applied to key frames if -qn is not specified (lowest to "
+            "highest layer)");
+static const arg_def_t quantizers_keyframe_arg =
+    ARG_DEF("qn", "quantizers-keyframe", 1, "quantizers for key frames (lowest "
+        "to highest layer)");
+
+static const arg_def_t *svc_args[] = {
+  &encoding_mode_arg, &frames_arg,        &width_arg,       &height_arg,
+  &timebase_arg,      &bitrate_arg,       &skip_frames_arg, &layers_arg,
+  &kf_dist_arg,       &scale_factors_arg, &quantizers_arg,
+  &quantizers_keyframe_arg, NULL
+};
+
+static const SVC_ENCODING_MODE default_encoding_mode =
+    INTER_LAYER_PREDICTION_IP;
+static const uint32_t default_frames_to_skip = 0;
+static const uint32_t default_frames_to_code = 60 * 60;
+static const uint32_t default_width = 1920;
+static const uint32_t default_height = 1080;
+static const uint32_t default_timebase_num = 1;
+static const uint32_t default_timebase_den = 60;
+static const uint32_t default_bitrate = 1000;
+static const uint32_t default_spatial_layers = 5;
+static const uint32_t default_kf_dist = 100;
+
+typedef struct {
+  const char *input_filename;
+  const char *output_filename;
+  uint32_t frames_to_code;
+  uint32_t frames_to_skip;
+} AppInput;
+
+static const char *exec_name;
+
+void usage_exit() {
+  fprintf(stderr, "Usage: %s <options> input_filename output_filename\n",
+          exec_name);
+  fprintf(stderr, "Options:\n");
+  arg_show_usage(stderr, svc_args);
+  exit(EXIT_FAILURE);
+}
+
+static void parse_command_line(int argc, const char **argv_,
+                               AppInput *app_input, SvcContext *svc_ctx,
+                               vpx_codec_enc_cfg_t *enc_cfg) {
+  struct arg arg = {0};
+  char **argv = NULL;
+  char **argi = NULL;
+  char **argj = NULL;
+  vpx_codec_err_t res;
+
+  // initialize SvcContext with parameters that will be passed to vpx_svc_init
+  svc_ctx->log_level = SVC_LOG_DEBUG;
+  svc_ctx->spatial_layers = default_spatial_layers;
+  svc_ctx->encoding_mode = default_encoding_mode;
+
+  // start with default encoder configuration
+  res = vpx_codec_enc_config_default(vpx_codec_vp9_cx(), enc_cfg, 0);
+  if (res) {
+    die("Failed to get config: %s\n", vpx_codec_err_to_string(res));
+  }
+  // update enc_cfg with app default values
+  enc_cfg->g_w = default_width;
+  enc_cfg->g_h = default_height;
+  enc_cfg->g_timebase.num = default_timebase_num;
+  enc_cfg->g_timebase.den = default_timebase_den;
+  enc_cfg->rc_target_bitrate = default_bitrate;
+  enc_cfg->kf_min_dist = default_kf_dist;
+  enc_cfg->kf_max_dist = default_kf_dist;
+
+  // initialize AppInput with default values
+  app_input->frames_to_code = default_frames_to_code;
+  app_input->frames_to_skip = default_frames_to_skip;
+
+  // process command line options
+  argv = argv_dup(argc - 1, argv_ + 1);
+  for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) {
+    arg.argv_step = 1;
+
+    if (arg_match(&arg, &encoding_mode_arg, argi)) {
+      svc_ctx->encoding_mode = arg_parse_enum_or_int(&arg);
+    } else if (arg_match(&arg, &frames_arg, argi)) {
+      app_input->frames_to_code = arg_parse_uint(&arg);
+    } else if (arg_match(&arg, &width_arg, argi)) {
+      enc_cfg->g_w = arg_parse_uint(&arg);
+    } else if (arg_match(&arg, &height_arg, argi)) {
+      enc_cfg->g_h = arg_parse_uint(&arg);
+    } else if (arg_match(&arg, &timebase_arg, argi)) {
+      enc_cfg->g_timebase = arg_parse_rational(&arg);
+    } else if (arg_match(&arg, &bitrate_arg, argi)) {
+      enc_cfg->rc_target_bitrate = arg_parse_uint(&arg);
+    } else if (arg_match(&arg, &skip_frames_arg, argi)) {
+      app_input->frames_to_skip = arg_parse_uint(&arg);
+    } else if (arg_match(&arg, &layers_arg, argi)) {
+      svc_ctx->spatial_layers = arg_parse_uint(&arg);
+    } else if (arg_match(&arg, &kf_dist_arg, argi)) {
+      enc_cfg->kf_min_dist = arg_parse_uint(&arg);
+      enc_cfg->kf_max_dist = enc_cfg->kf_min_dist;
+    } else if (arg_match(&arg, &scale_factors_arg, argi)) {
+      vpx_svc_set_scale_factors(svc_ctx, arg.val);
+    } else if (arg_match(&arg, &quantizers_arg, argi)) {
+      vpx_svc_set_quantizers(svc_ctx, arg.val, 0);
+    } else if (arg_match(&arg, &quantizers_keyframe_arg, argi)) {
+      vpx_svc_set_quantizers(svc_ctx, arg.val, 1);
+    } else {
+      ++argj;
+    }
+  }
+
+  // Check for unrecognized options
+  for (argi = argv; *argi; ++argi)
+    if (argi[0][0] == '-' && strlen(argi[0]) > 1)
+      die("Error: Unrecognized option %s\n", *argi);
+
+  if (argv[0] == NULL || argv[1] == 0) {
+    usage_exit();
+  }
+  app_input->input_filename = argv[0];
+  app_input->output_filename = argv[1];
+  free(argv);
+
+  if (enc_cfg->g_w < 16 || enc_cfg->g_w % 2 || enc_cfg->g_h < 16 ||
+      enc_cfg->g_h % 2)
+    die("Invalid resolution: %d x %d\n", enc_cfg->g_w, enc_cfg->g_h);
+
+  printf(
+      "Codec %s\nframes: %d, skip: %d\n"
+      "mode: %d, layers: %d\n"
+      "width %d, height: %d,\n"
+      "num: %d, den: %d, bitrate: %d,\n"
+      "gop size: %d\n",
+      vpx_codec_iface_name(vpx_codec_vp9_cx()), app_input->frames_to_code,
+      app_input->frames_to_skip, svc_ctx->encoding_mode,
+      svc_ctx->spatial_layers, enc_cfg->g_w, enc_cfg->g_h,
+      enc_cfg->g_timebase.num, enc_cfg->g_timebase.den,
+      enc_cfg->rc_target_bitrate, enc_cfg->kf_max_dist);
+}
+
+int main(int argc, const char **argv) {
+  AppInput app_input = {0};
+  VpxVideoWriter *writer = NULL;
+  VpxVideoInfo info = {0};
+  vpx_codec_ctx_t codec;
+  vpx_codec_enc_cfg_t enc_cfg;
+  SvcContext svc_ctx;
+  uint32_t i;
+  uint32_t frame_cnt = 0;
+  vpx_image_t raw;
+  vpx_codec_err_t res;
+  int pts = 0;            /* PTS starts at 0 */
+  int frame_duration = 1; /* 1 timebase tick per frame */
+  FILE *infile = NULL;
+
+  memset(&svc_ctx, 0, sizeof(svc_ctx));
+  svc_ctx.log_print = 1;
+  exec_name = argv[0];
+  parse_command_line(argc, argv, &app_input, &svc_ctx, &enc_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 %dx%d\n", enc_cfg.g_w, enc_cfg.g_h);
+
+  if (!(infile = fopen(app_input.input_filename, "rb")))
+    die("Failed to open %s for reading\n", app_input.input_filename);
+
+  // Initialize codec
+  if (vpx_svc_init(&svc_ctx, &codec, vpx_codec_vp9_cx(), &enc_cfg) !=
+      VPX_CODEC_OK)
+    die("Failed to initialize encoder\n");
+
+  info.codec_fourcc = VP9_FOURCC;
+  info.time_base.numerator = enc_cfg.g_timebase.num;
+  info.time_base.denominator = enc_cfg.g_timebase.den;
+  if (vpx_svc_get_layer_resolution(&svc_ctx, svc_ctx.spatial_layers - 1,
+                                   (unsigned int *)&info.frame_width,
+                                   (unsigned int *)&info.frame_height) !=
+      VPX_CODEC_OK) {
+    die("Failed to get output resolution");
+  }
+  writer = vpx_video_writer_open(app_input.output_filename, kContainerIVF,
+                                 &info);
+  if (!writer)
+    die("Failed to open %s for writing\n", app_input.output_filename);
+
+  // skip initial frames
+  for (i = 0; i < app_input.frames_to_skip; ++i)
+    vpx_img_read(&raw, infile);
+
+  // Encode frames
+  while (frame_cnt < app_input.frames_to_code) {
+    if (!vpx_img_read(&raw, infile))
+      break;
+
+    res = vpx_svc_encode(&svc_ctx, &codec, &raw, pts, frame_duration,
+                         VPX_DL_REALTIME);
+    printf("%s", vpx_svc_get_message(&svc_ctx));
+    if (res != VPX_CODEC_OK) {
+      die_codec(&codec, "Failed to encode frame");
+    }
+    if (vpx_svc_get_frame_size(&svc_ctx) > 0) {
+      vpx_video_writer_write_frame(writer,
+                                   vpx_svc_get_buffer(&svc_ctx),
+                                   vpx_svc_get_frame_size(&svc_ctx),
+                                   pts);
+    }
+    ++frame_cnt;
+    pts += frame_duration;
+  }
+
+  printf("Processed %d frames\n", frame_cnt);
+
+  fclose(infile);
+  if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
+
+  vpx_video_writer_close(writer);
+
+  vpx_img_free(&raw);
+
+  // display average size, psnr
+  printf("%s", vpx_svc_dump_statistics(&svc_ctx));
+
+  vpx_svc_release(&svc_ctx);
+
+  return EXIT_SUCCESS;
+}