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 "vpx/svc_context.h"
#include "vpx/vp8cx.h"
#include "vpx/vpx_encoder.h"

#define VP90_FOURCC 0x30395056

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 (lowest to highest layer)");
static const arg_def_t dummy_frame_arg =
    ARG_DEF("z", "dummy-frame", 1, "make first frame blank and full size");

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,  &dummy_frame_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;