#!/usr/bin/env python
## Copyright (c) 2019, Alliance for Open Media. All rights reserved
##
## This source code is subject to the terms of the BSD 2 Clause License and
## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
## was not distributed with this source code in the LICENSE file, you can
## obtain it at www.aomedia.org/license/software. If the Alliance for Open
## Media Patent License 1.0 was not distributed with this source code in the
## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
##
__author__ = "maggie.sun@intel.com, ryan.lei@intel.com"

import Utils
from Config import AOMENC, SVTAV1
from Utils import ExecuteCmd

def get_qindex_from_QP(QP):
    quantizer_to_qindex = [
    0,   4,   8,   12,  16,  20,  24,  28,  32,  36,  40,  44,  48,
    52,  56,  60,  64,  68,  72,  76,  80,  84,  88,  92,  96,  100,
    104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152,
    156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204,
    208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 249, 255]
    if (QP > 63):
        print(" QP %d is out of range (0 to 63), clamp to 63", QP)
        return quantizer_to_qindex[63]
    return quantizer_to_qindex[QP]

def EncodeWithAOM_AV1(clip, test_cfg, QP, framenum, outfile, preset,
                      LogCmdOnly=False):
    args = " --verbose --codec=av1 -v --psnr --obu --frame-parallel=0" \
           " --cpu-used=%s --limit=%d --auto-alt-ref=1 --passes=1" \
           " --end-usage=q --i%s --threads=1  --end-usage=q" \
           " --use-fixed-qp-offsets=1 --deltaq-mode=0 --enable-tpl-model=0" \
           " --enable-keyframe-filtering=0 --fps=%d/%d --input-bit-depth=%d" \
           " --bit-depth=%d --qp=%d -w %d -h %d" \
           % (preset, framenum, clip.fmt, clip.fps_num, clip.fps_denom,
              clip.bit_depth, clip.bit_depth, get_qindex_from_QP(QP),
              clip.width, clip.height)

    if test_cfg == "RA" or test_cfg == "AS":
        args += " --min-gf-interval=16 --max-gf-interval=16 --gf-min-pyr-height=4" \
                " --gf-max-pyr-height=4 --kf-min-dist=65 --kf-max-dist=65" \
                " --lag-in-frames=19"
    elif test_cfg == "LD":
        args += " --kf-min-dist=9999 --kf-max-dist=9999 --lag-in-frames=0" \
                " --subgop-config-str=ld"
    else:
        print("Unsupported Test Configuration %s" % test_cfg)
    args += " -o %s %s" % (outfile, clip.file_path)
    cmd = AOMENC + args
    ExecuteCmd(cmd, LogCmdOnly)

def EncodeWithSVT_AV1(clip, test_cfg, QP, framenum, outfile, preset,
                      LogCmdOnly=False):
    #TODO: update svt parameters
    args = " --preset %s --scm 2 --lookahead 0 --hierarchical-levels 3 -n %d" \
           " --keyint 255 -rc 0 -q %d -w %d -h %d -b %s -i %s"\
           % (str(preset), framenum, QP, clip.width, clip.height, outfile,
              clip.file_path)
    cmd = SVTAV1 + args
    ExecuteCmd(cmd, LogCmdOnly)

def VideoEncode(EncodeMethod, CodecName, clip, test_cfg, QP, framenum, outfile,
                preset, LogCmdOnly=False):
    Utils.CmdLogger.write("::Encode\n")
    if CodecName == 'av1':
        if EncodeMethod == "aom":
            EncodeWithAOM_AV1(clip, test_cfg, QP, framenum, outfile, preset,
                              LogCmdOnly)
        elif EncodeMethod == "svt":
            EncodeWithSVT_AV1(clip, test_cfg, QP, framenum, outfile, preset,
                              LogCmdOnly)
        else:
            raise ValueError("invalid parameter for encode.")
    else:
        raise ValueError("invalid parameter for encode.")