mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-02 20:42:29 +01:00
Henrik RydgårdandClaude Opus 5.5
d0e3141f43
The ffmpeg submodule held prebuilt libraries for every platform next to the sources (about 1.5 GB checked out), and nothing uses those any more. Only the needed sources are copied in, from the submodule's commit, along with every header and template they include. The path is new, so checking out commits on either side of this works. It's also cut down to what PPSSPP uses: the H.264, AAC, MP3, ATRAC3 and ATRAC3+ decoders, the H.264 parser, the demuxers as before, and the FFV1 encoder, AVI muxer and file protocol for AVI dumping. config.h takes its CONFIG_ values from FFmpeg 3.0.2's own configure run with just those enabled. The raw H.264 demuxer stays even though nothing opens raw H.264: probing PSMF data uses it to identify the video stream's codec, which otherwise comes out as none. On top of that: - The files nothing links (configure would build them, but they're never pulled out of the static library, going by the GCC link map) are left out: mostly libavutil's crypto and hashing and the alternative DCT/IDCT/FFT versions. - libswresample isn't built, now that nothing uses it. - The H.264 decoder only does 8-bit video, which is all the PSP has. The SPS parser rejects any other bit depth, and the DSP files no longer build their 9- to 16-bit variants, which the linker kept because the init functions pick one by bit depth at run time. That's 160 files to compile instead of 277, and 391 of FFmpeg's vendored, about 5.8 MB. The README in ext/ffmpeg has what was done, the PPSSPP patches in the copy, how to add a component, and the tradeoffs. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
186 lines
5.4 KiB
C
186 lines
5.4 KiB
C
/*
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* ID3v2 header parser
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* Copyright (c) 2003 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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#ifndef AVFORMAT_ID3V2_H
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#define AVFORMAT_ID3V2_H
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#include <stdint.h>
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#include "avformat.h"
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#include "internal.h"
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#include "metadata.h"
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#define ID3v2_HEADER_SIZE 10
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/**
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* Default magic bytes for ID3v2 header: "ID3"
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*/
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#define ID3v2_DEFAULT_MAGIC "ID3"
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#define ID3v2_FLAG_DATALEN 0x0001
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#define ID3v2_FLAG_UNSYNCH 0x0002
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#define ID3v2_FLAG_ENCRYPTION 0x0004
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#define ID3v2_FLAG_COMPRESSION 0x0008
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enum ID3v2Encoding {
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ID3v2_ENCODING_ISO8859 = 0,
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ID3v2_ENCODING_UTF16BOM = 1,
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ID3v2_ENCODING_UTF16BE = 2,
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ID3v2_ENCODING_UTF8 = 3,
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};
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typedef struct ID3v2EncContext {
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int version; ///< ID3v2 minor version, either 3 or 4
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int64_t size_pos; ///< offset of the tag total size
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int len; ///< size of the tag written so far
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} ID3v2EncContext;
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typedef struct ID3v2ExtraMeta {
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const char *tag;
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void *data;
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struct ID3v2ExtraMeta *next;
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} ID3v2ExtraMeta;
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typedef struct ID3v2ExtraMetaGEOB {
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uint32_t datasize;
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uint8_t *mime_type;
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uint8_t *file_name;
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uint8_t *description;
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uint8_t *data;
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} ID3v2ExtraMetaGEOB;
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typedef struct ID3v2ExtraMetaAPIC {
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AVBufferRef *buf;
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const char *type;
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uint8_t *description;
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enum AVCodecID id;
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} ID3v2ExtraMetaAPIC;
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typedef struct ID3v2ExtraMetaPRIV {
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uint8_t *owner;
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uint8_t *data;
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uint32_t datasize;
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} ID3v2ExtraMetaPRIV;
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/**
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* Detect ID3v2 Header.
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* @param buf must be ID3v2_HEADER_SIZE byte long
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* @param magic magic bytes to identify the header.
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* If in doubt, use ID3v2_DEFAULT_MAGIC.
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*/
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int ff_id3v2_match(const uint8_t *buf, const char *magic);
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/**
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* Get the length of an ID3v2 tag.
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* @param buf must be ID3v2_HEADER_SIZE bytes long and point to the start of an
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* already detected ID3v2 tag
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*/
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int ff_id3v2_tag_len(const uint8_t *buf);
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/**
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* Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
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*
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* Chapters are not currently read by this variant.
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*
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* @param metadata Parsed metadata is stored here
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* @param extra_meta If not NULL, extra metadata is parsed into a list of
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* ID3v2ExtraMeta structs and *extra_meta points to the head of the list
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*/
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void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta);
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/**
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* Read an ID3v2 tag, including supported extra metadata and chapters.
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*
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* Data is read from and stored to AVFormatContext.
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*
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* @param extra_meta If not NULL, extra metadata is parsed into a list of
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* ID3v2ExtraMeta structs and *extra_meta points to the head of the list
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* @param[opt] max_search_search restrict ID3 magic number search (bytes from start)
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*/
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void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta,
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unsigned int max_search_size);
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/**
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* Initialize an ID3v2 tag.
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*/
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void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version,
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const char *magic);
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/**
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* Convert and write all global metadata from s into an ID3v2 tag.
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*/
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int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3);
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/**
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* Write an attached picture from pkt into an ID3v2 tag.
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*/
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int ff_id3v2_write_apic(AVFormatContext *s, ID3v2EncContext *id3, AVPacket *pkt);
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/**
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* Finalize an opened ID3v2 tag.
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*/
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void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb, int padding_bytes);
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/**
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* Write an ID3v2 tag containing all global metadata from s.
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* @param id3v2_version Subversion of ID3v2; supported values are 3 and 4
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* @param magic magic bytes to identify the header
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* If in doubt, use ID3v2_DEFAULT_MAGIC.
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*/
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int ff_id3v2_write_simple(struct AVFormatContext *s, int id3v2_version, const char *magic);
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/**
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* Free memory allocated parsing special (non-text) metadata.
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* @param extra_meta Pointer to a pointer to the head of a ID3v2ExtraMeta list, *extra_meta is set to NULL.
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*/
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void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta);
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/**
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* Create a stream for each APIC (attached picture) extracted from the
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* ID3v2 header.
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*/
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int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta);
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extern const AVMetadataConv ff_id3v2_34_metadata_conv[];
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extern const AVMetadataConv ff_id3v2_4_metadata_conv[];
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/**
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* A list of text information frames allowed in both ID3 v2.3 and v2.4
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* http://www.id3.org/id3v2.4.0-frames
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* http://www.id3.org/id3v2.4.0-changes
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*/
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extern const char ff_id3v2_tags[][4];
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/**
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* ID3v2.4-only text information frames.
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*/
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extern const char ff_id3v2_4_tags[][4];
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/**
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* ID3v2.3-only text information frames.
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*/
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extern const char ff_id3v2_3_tags[][4];
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extern const CodecMime ff_id3v2_mime_tags[];
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extern const char *ff_id3v2_picture_types[21];
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#endif /* AVFORMAT_ID3V2_H */
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