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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __FFmpegAACDecoder_h__
#define __FFmpegAACDecoder_h__
#include "FFmpegDataDecoder.h"
#include "FFmpegLibWrapper.h"
namespace mozilla {
template <int V>
class FFmpegAudioDecoder {};
template <>
class FFmpegAudioDecoder<LIBAV_VER>;
DDLoggedTypeNameAndBase(FFmpegAudioDecoder<LIBAV_VER>,
FFmpegDataDecoder<LIBAV_VER>);
template <>
class FFmpegAudioDecoder<LIBAV_VER>
: public FFmpegDataDecoder<LIBAV_VER>,
public DecoderDoctorLifeLogger<FFmpegAudioDecoder<LIBAV_VER>> {
public:
FFmpegAudioDecoder(FFmpegLibWrapper* aLib, const AudioInfo& aConfig);
virtual ~FFmpegAudioDecoder();
RefPtr<InitPromise> Init() override;
void InitCodecContext() MOZ_REQUIRES(sMutex) override;
static AVCodecID GetCodecId(const nsACString& aMimeType);
nsCString GetDescriptionName() const override {
#ifdef USING_MOZFFVPX
return "ffvpx audio decoder"_ns;
#else
return "ffmpeg audio decoder"_ns;
#endif
}
nsCString GetCodecName() const override;
private:
MediaResult DoDecode(MediaRawData* aSample, uint8_t* aData, int aSize,
bool* aGotFrame, DecodedData& aResults) override;
// This method is to be called only when decoding mp3, in order to correctly
// discard padding frames.
uint64_t Padding() const;
// This method is to be called only when decoding AAC, in order to correctly
// discard padding frames, based on the number of frames decoded and the total
// frame count of the media.
uint64_t TotalFrames() const;
// The number of frames of encoder delay, that need to be discarded at the
// beginning of the stream.
uint32_t mEncoderDelay = 0;
// This holds either the encoder padding (when this decoder decodes mp3), or
// the total frame count of the media (when this decoder decodes AAC).
// It is best accessed via the `Padding` and `TotalFrames` methods, for
// clarity.
uint64_t mEncoderPaddingOrTotalFrames = 0;
};
} // namespace mozilla
#endif // __FFmpegAACDecoder_h__
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