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- // 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 <stdint.h>
- #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<AVCodecParameters> 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_
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