// Copyright (c) 2011 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/ffmpeg/ffmpeg_common.h"

#include "base/logging.h"

namespace media {

static const AVRational kMicrosBase = { 1, base::Time::kMicrosecondsPerSecond };

base::TimeDelta ConvertTimestamp(const AVRational& time_base, int64 timestamp) {
  int64 microseconds = av_rescale_q(timestamp, time_base, kMicrosBase);
  return base::TimeDelta::FromMicroseconds(microseconds);
}

VideoCodec CodecIDToVideoCodec(CodecID codec_id) {
  switch (codec_id) {
    case CODEC_ID_VC1:
      return kCodecVC1;
    case CODEC_ID_H264:
      return kCodecH264;
    case CODEC_ID_THEORA:
      return kCodecTheora;
    case CODEC_ID_MPEG2VIDEO:
      return kCodecMPEG2;
    case CODEC_ID_MPEG4:
      return kCodecMPEG4;
    case CODEC_ID_VP8:
      return kCodecVP8;
    default:
      NOTREACHED();
  }
  return kUnknown;
}

CodecID VideoCodecToCodecID(VideoCodec video_codec) {
  switch (video_codec) {
    case kCodecVC1:
      return CODEC_ID_VC1;
    case kCodecH264:
      return CODEC_ID_H264;
    case kCodecTheora:
      return CODEC_ID_THEORA;
    case kCodecMPEG2:
      return CODEC_ID_MPEG2VIDEO;
    case kCodecMPEG4:
      return CODEC_ID_MPEG4;
    case kCodecVP8:
      return CODEC_ID_VP8;
    default:
      NOTREACHED();
  }
  return CODEC_ID_NONE;
}

}  // namespace media