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-rw-r--r--dom/media/platforms/ffmpeg/FFmpegAudioDecoder.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.h b/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.h
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+++ b/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.h
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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__