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// 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
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