// Copyright 2014 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. #ifndef MEDIA_FILTERS_FFMPEG_AAC_BITSTREAM_CONVERTER_H_ #define MEDIA_FILTERS_FFMPEG_AAC_BITSTREAM_CONVERTER_H_ #include #include "base/memory/raw_ptr.h" #include "media/base/media_export.h" #include "media/filters/ffmpeg_bitstream_converter.h" // Forward declarations for FFmpeg datatypes used. struct AVCodecParameters; struct AVPacket; namespace media { // Bitstream converter that adds ADTS headers to AAC frames. class MEDIA_EXPORT FFmpegAACBitstreamConverter : public FFmpegBitstreamConverter { public: enum { kAdtsHeaderSize = 7 }; // The |stream_codec_parameters| will be used during conversion and should be // the AVCodecParameters for the stream sourcing these packets. A reference to // |stream_codec_parameters| is retained, so it must outlive this class. explicit FFmpegAACBitstreamConverter( AVCodecParameters* stream_codec_parameters); FFmpegAACBitstreamConverter(const FFmpegAACBitstreamConverter&) = delete; FFmpegAACBitstreamConverter& operator=(const FFmpegAACBitstreamConverter&) = delete; ~FFmpegAACBitstreamConverter() override; // FFmpegBitstreamConverter implementation. // Uses FFmpeg allocation methods for buffer allocation to ensure // compatibility with FFmpeg's memory management. bool ConvertPacket(AVPacket* packet) override; private: // Variable to hold a pointer to memory where we can access the global // data from the FFmpeg file format's global headers. raw_ptr stream_codec_parameters_; bool header_generated_; uint8_t hdr_[kAdtsHeaderSize]; int codec_; int audio_profile_; int sample_rate_index_; int channel_configuration_; int frame_length_; }; } // namespace media #endif // MEDIA_FILTERS_FFMPEG_AAC_BITSTREAM_CONVERTER_H_