// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/base/video_decoder_config.h"

#include "base/logging.h"
#include "media/base/video_frame.h"

namespace media {

VideoCodec VideoCodecProfileToVideoCodec(VideoCodecProfile profile) {
  switch (profile) {
    case VIDEO_CODEC_PROFILE_UNKNOWN:
      return kUnknownVideoCodec;
    case H264PROFILE_BASELINE:
    case H264PROFILE_MAIN:
    case H264PROFILE_EXTENDED:
    case H264PROFILE_HIGH:
    case H264PROFILE_HIGH10PROFILE:
    case H264PROFILE_HIGH422PROFILE:
    case H264PROFILE_HIGH444PREDICTIVEPROFILE:
    case H264PROFILE_SCALABLEBASELINE:
    case H264PROFILE_SCALABLEHIGH:
    case H264PROFILE_STEREOHIGH:
    case H264PROFILE_MULTIVIEWHIGH:
      return kCodecH264;
    case VP8PROFILE_ANY:
      return kCodecVP8;
    case VP9PROFILE_ANY:
      return kCodecVP9;
  }
  NOTREACHED();
  return kUnknownVideoCodec;
}


VideoDecoderConfig::VideoDecoderConfig()
    : codec_(kUnknownVideoCodec),
      profile_(VIDEO_CODEC_PROFILE_UNKNOWN),
      format_(PIXEL_FORMAT_UNKNOWN),
      is_encrypted_(false) {
}

VideoDecoderConfig::VideoDecoderConfig(VideoCodec codec,
                                       VideoCodecProfile profile,
                                       VideoPixelFormat format,
                                       ColorSpace color_space,
                                       const gfx::Size& coded_size,
                                       const gfx::Rect& visible_rect,
                                       const gfx::Size& natural_size,
                                       const uint8* extra_data,
                                       size_t extra_data_size,
                                       bool is_encrypted) {
  Initialize(codec, profile, format, color_space, coded_size, visible_rect,
             natural_size, extra_data, extra_data_size, is_encrypted);
}

VideoDecoderConfig::~VideoDecoderConfig() {}

void VideoDecoderConfig::Initialize(VideoCodec codec,
                                    VideoCodecProfile profile,
                                    VideoPixelFormat format,
                                    ColorSpace color_space,
                                    const gfx::Size& coded_size,
                                    const gfx::Rect& visible_rect,
                                    const gfx::Size& natural_size,
                                    const uint8* extra_data,
                                    size_t extra_data_size,
                                    bool is_encrypted) {
  CHECK((extra_data_size != 0) == (extra_data != NULL));

  codec_ = codec;
  profile_ = profile;
  format_ = format;
  color_space_ = color_space;
  coded_size_ = coded_size;
  visible_rect_ = visible_rect;
  natural_size_ = natural_size;
  extra_data_.assign(extra_data, extra_data + extra_data_size);
  is_encrypted_ = is_encrypted;
}

bool VideoDecoderConfig::IsValidConfig() const {
  return codec_ != kUnknownVideoCodec &&
      natural_size_.width() > 0 &&
      natural_size_.height() > 0 &&
      VideoFrame::IsValidConfig(format_, VideoFrame::STORAGE_UNOWNED_MEMORY,
                                coded_size_, visible_rect_, natural_size_);
}

bool VideoDecoderConfig::Matches(const VideoDecoderConfig& config) const {
  return ((codec() == config.codec()) &&
          (format() == config.format()) &&
          (profile() == config.profile()) &&
          (coded_size() == config.coded_size()) &&
          (visible_rect() == config.visible_rect()) &&
          (natural_size() == config.natural_size()) &&
          (extra_data_size() == config.extra_data_size()) &&
          (!extra_data() || !memcmp(extra_data(), config.extra_data(),
                                    extra_data_size())) &&
          (is_encrypted() == config.is_encrypted()));
}

std::string VideoDecoderConfig::AsHumanReadableString() const {
  std::ostringstream s;
  s << "codec: " << GetHumanReadableCodecName()
    << " format: " << format()
    << " profile: " << profile()
    << " coded size: [" << coded_size().width()
    << "," << coded_size().height() << "]"
    << " visible rect: [" << visible_rect().x()
    << "," << visible_rect().y()
    << "," << visible_rect().width()
    << "," << visible_rect().height() << "]"
    << " natural size: [" << natural_size().width()
    << "," << natural_size().height() << "]"
    << " has extra data? " << (extra_data() ? "true" : "false")
    << " encrypted? " << (is_encrypted() ? "true" : "false");
  return s.str();
}

// The names come from src/third_party/ffmpeg/libavcodec/codec_desc.c
std::string VideoDecoderConfig::GetHumanReadableCodecName() const {
  switch (codec()) {
    case kUnknownVideoCodec:
      return "unknown";
    case kCodecH264:
      return "h264";
    case kCodecVC1:
      return "vc1";
    case kCodecMPEG2:
      return "mpeg2video";
    case kCodecMPEG4:
      return "mpeg4";
    case kCodecTheora:
      return "theora";
    case kCodecVP8:
      return "vp8";
    case kCodecVP9:
      return "vp9";
  }
  NOTREACHED();
  return "";
}

const uint8* VideoDecoderConfig::extra_data() const {
  if (extra_data_.empty())
    return NULL;
  return &extra_data_[0];
}

}  // namespace media