130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
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/*
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* RIFF common functions and data
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* copyright (c) 2000 Fabrice Bellard
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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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/**
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* @file
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* internal header for RIFF based (de)muxers
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* do NOT include this in end user applications
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*/
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#ifndef AVFORMAT_RIFF_H
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#define AVFORMAT_RIFF_H
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#include "libavcodec/avcodec.h"
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#include "avio.h"
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#include "internal.h"
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#include "metadata.h"
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extern const AVMetadataConv ff_riff_info_conv[];
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int64_t ff_start_tag(AVIOContext *pb, const char *tag);
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void ff_end_tag(AVIOContext *pb, int64_t start);
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/**
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* Read BITMAPINFOHEADER structure and set AVStream codec width, height and
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* bits_per_encoded_sample fields. Does not read extradata.
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* Writes the size of the BMP file to *size.
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* @return codec tag
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*/
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int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size);
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void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par, int for_asf, int ignore_extradata);
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/**
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* Tell ff_put_wav_header() to use WAVEFORMATEX even for PCM codecs.
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*/
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#define FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX 0x00000001
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/**
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* Tell ff_put_wav_header() to write an empty channel mask.
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*/
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#define FF_PUT_WAV_HEADER_SKIP_CHANNELMASK 0x00000002
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/**
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* Write WAVEFORMAT header structure.
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*
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* @param flags a combination of FF_PUT_WAV_HEADER_* constants
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*
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* @return the size or -1 on error
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*/
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int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int flags);
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enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps);
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int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian);
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extern const AVCodecTag ff_codec_bmp_tags[]; // exposed through avformat_get_riff_video_tags()
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extern const AVCodecTag ff_codec_wav_tags[];
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extern const AVCodecTag ff_codec_bmp_tags_unofficial[];
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void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale);
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int ff_read_riff_info(AVFormatContext *s, int64_t size);
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/**
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* Write all recognized RIFF tags from s->metadata
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*/
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void ff_riff_write_info(AVFormatContext *s);
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/**
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* Write a single RIFF info tag
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*/
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void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str);
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typedef uint8_t ff_asf_guid[16];
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typedef struct AVCodecGuid {
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enum AVCodecID id;
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ff_asf_guid guid;
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} AVCodecGuid;
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extern const AVCodecGuid ff_codec_wav_guids[];
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#define FF_PRI_GUID \
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"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x " \
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"{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x}"
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#define FF_ARG_GUID(g) \
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g[0], g[1], g[2], g[3], g[4], g[5], g[6], g[7], \
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g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15],\
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g[3], g[2], g[1], g[0], g[5], g[4], g[7], g[6], \
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g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15]
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#define FF_MEDIASUBTYPE_BASE_GUID \
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0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71
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#define FF_AMBISONIC_BASE_GUID \
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0x21, 0x07, 0xD3, 0x11, 0x86, 0x44, 0xC8, 0xC1, 0xCA, 0x00, 0x00, 0x00
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#define FF_BROKEN_BASE_GUID \
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xAA
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static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
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{
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return memcmp(g1, g2, sizeof(ff_asf_guid));
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}
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int ff_get_guid(AVIOContext *s, ff_asf_guid *g);
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void ff_put_guid(AVIOContext *s, const ff_asf_guid *g);
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const ff_asf_guid *ff_get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid);
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enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid);
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#endif /* AVFORMAT_RIFF_H */
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