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77 lines
2.8 KiB
77 lines
2.8 KiB
/* |
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* Opus decoder/parser common functions and structures |
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* Copyright (c) 2012 Andrew D'Addesio |
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* Copyright (c) 2013-2014 Mozilla Corporation |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_OPUS_PARSE_H |
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#define AVCODEC_OPUS_PARSE_H |
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#include <stdint.h> |
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#include "libavcodec/avcodec.h" |
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#include "opus.h" |
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typedef struct OpusPacket { |
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int packet_size; /**< packet size */ |
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int data_size; /**< size of the useful data -- packet size - padding */ |
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int code; /**< packet code: specifies the frame layout */ |
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int stereo; /**< whether this packet is mono or stereo */ |
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int vbr; /**< vbr flag */ |
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int config; /**< configuration: tells the audio mode, |
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** bandwidth, and frame duration */ |
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int frame_count; /**< frame count */ |
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int frame_offset[OPUS_MAX_FRAMES]; /**< frame offsets */ |
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int frame_size[OPUS_MAX_FRAMES]; /**< frame sizes */ |
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int frame_duration; /**< frame duration, in samples @ 48kHz */ |
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enum OpusMode mode; /**< mode */ |
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enum OpusBandwidth bandwidth; /**< bandwidth */ |
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} OpusPacket; |
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// a mapping between an opus stream and an output channel |
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typedef struct ChannelMap { |
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int stream_idx; |
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int channel_idx; |
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// when a single decoded channel is mapped to multiple output channels, we |
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// write to the first output directly and copy from it to the others |
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// this field is set to 1 for those copied output channels |
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int copy; |
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// this is the index of the output channel to copy from |
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int copy_idx; |
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// this channel is silent |
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int silence; |
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} ChannelMap; |
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typedef struct OpusParseContext { |
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int nb_streams; |
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int nb_stereo_streams; |
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int16_t gain_i; |
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ChannelMap *channel_maps; |
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} OpusParseContext; |
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int ff_opus_parse_packet(OpusPacket *pkt, const uint8_t *buf, int buf_size, |
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int self_delimited); |
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int ff_opus_parse_extradata(AVCodecContext *avctx, OpusParseContext *s); |
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#endif /* AVCODEC_OPUS_PARSE_H */
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