text: #!/bin/sh
  ##
  ##  Copyright (c) 2014 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 file tests vpxdec. To add new tests to this file, do the following:
  ##    1. Write a shell function (this is your test).
  ##    2. Add the function to vpxdec_tests (on a new line).
  ##
  . $(dirname $0)/tools_common.sh
  
  # Environment check: Make sure input is available.
  vpxdec_verify_environment() {
    if [ ! -e "${VP8_IVF_FILE}" ] || [ ! -e "${VP9_WEBM_FILE}" ] || \
      [ ! -e "${VP9_FPM_WEBM_FILE}" ] || \
      [ ! -e "${VP9_LT_50_FRAMES_WEBM_FILE}" ] ; then
      elog "Libvpx test data must exist in LIBVPX_TEST_DATA_PATH."
      return 1
    fi
    if [ -z "$(vpx_tool_path vpxdec)" ]; then
      elog "vpxdec not found. It must exist in LIBVPX_BIN_PATH or its parent."
      return 1
    fi
  }
  
  # Wrapper function for running vpxdec with pipe input. Requires that
  # LIBVPX_BIN_PATH points to the directory containing vpxdec. $1 is used as the
  # input file path and shifted away. All remaining parameters are passed through
  # to vpxdec.
  vpxdec_pipe() {
    local readonly decoder="$(vpx_tool_path vpxdec)"
    local readonly input="$1"
    shift
    cat "${input}" | eval "${VPX_TEST_PREFIX}" "${decoder}" - "$@" ${devnull}
  }
  
  # Wrapper function for running vpxdec. Requires that LIBVPX_BIN_PATH points to
  # the directory containing vpxdec. $1 one is used as the input file path and
  # shifted away. All remaining parameters are passed through to vpxdec.
  vpxdec() {
    local readonly decoder="$(vpx_tool_path vpxdec)"
    local readonly input="$1"
    shift
    eval "${VPX_TEST_PREFIX}" "${decoder}" "$input" "$@" ${devnull}
  }
  
  vpxdec_can_decode_vp8() {
    if [ "$(vp8_decode_available)" = "yes" ]; then
      echo yes
    fi
  }
  
  vpxdec_can_decode_vp9() {
    if [ "$(vp9_decode_available)" = "yes" ]; then
      echo yes
    fi
  }
  
  vpxdec_vp8_ivf() {
    if [ "$(vpxdec_can_decode_vp8)" = "yes" ]; then
      vpxdec "${VP8_IVF_FILE}" --summary --noblit
    fi
  }
  
  vpxdec_vp8_ivf_pipe_input() {
    if [ "$(vpxdec_can_decode_vp8)" = "yes" ]; then
      vpxdec_pipe "${VP8_IVF_FILE}" --summary --noblit
    fi
  }
  
  vpxdec_vp9_webm() {
    if [ "$(vpxdec_can_decode_vp9)" = "yes" ] && \
       [ "$(webm_io_available)" = "yes" ]; then
      vpxdec "${VP9_WEBM_FILE}" --summary --noblit
    fi
  }
  
  vpxdec_vp9_webm_frame_parallel() {
    if [ "$(vpxdec_can_decode_vp9)" = "yes" ] && \
       [ "$(webm_io_available)" = "yes" ]; then
      for threads in 2 3 4 5 6 7 8; do
        vpxdec "${VP9_FPM_WEBM_FILE}" --summary --noblit --threads=$threads \
          --frame-parallel
      done
    fi
  }
  
  vpxdec_vp9_webm_less_than_50_frames() {
    # ensure that reaching eof in webm_guess_framerate doesn't result in invalid
    # frames in actual webm_read_frame calls.
    if [ "$(vpxdec_can_decode_vp9)" = "yes" ] && \
       [ "$(webm_io_available)" = "yes" ]; then
      local readonly decoder="$(vpx_tool_path vpxdec)"
      local readonly expected=10
      local readonly num_frames=$(${VPX_TEST_PREFIX} "${decoder}" \
        "${VP9_LT_50_FRAMES_WEBM_FILE}" --summary --noblit 2>&1 \
        | awk '/^[0-9]+ decoded frames/ { print $1 }')
      if [ "$num_frames" -ne "$expected" ]; then
        elog "Output frames ($num_frames) != expected ($expected)"
        return 1
      fi
    fi
  }
  
  vpxdec_tests="vpxdec_vp8_ivf
                vpxdec_vp8_ivf_pipe_input
                vpxdec_vp9_webm
                vpxdec_vp9_webm_frame_parallel
                vpxdec_vp9_webm_less_than_50_frames"
  
  run_tests vpxdec_verify_environment "${vpxdec_tests}"
  