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4fc2531fff
opus.h (which is used by all the Opus code) currently includes several structures only used by the parser and the decoder; several elements of OpusContext are even only used by the decoder. This commit therefore moves the part of OpusContext that is shared between these two components (and used by ff_opus_parse_extradata()) out into a new structure and moves all the other accompanying structures and functions to a new header, opus_parse.h; the functions itself are also moved to a new file, opus_parse.c. (This also allows to remove several spurious dependencies of the Opus parser and encoder.) Reviewed-by: Lynne <dev@lynne.ee> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/*
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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 "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[MAX_FRAMES]; /**< frame offsets */
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int frame_size[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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