mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-02 04:21:41 +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>
113 lines
4.3 KiB
C
113 lines
4.3 KiB
C
/*
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* Realmedia RTSP (RDT) definitions
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* Copyright (c) 2007 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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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_RDT_H
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#define AVFORMAT_RDT_H
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#include <stdint.h>
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#include "avformat.h"
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#include "rtpdec.h"
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typedef struct RDTDemuxContext RDTDemuxContext;
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/**
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* Allocate and init the RDT parsing context.
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* @param ic the containing RTSP demuxer context
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* @param first_stream_of_set_idx index to the first AVStream in the RTSP
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* demuxer context's ic->streams array that is part of this
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* particular stream's set of streams (with identical content)
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* @param priv_data private data of the payload data handler context
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* @param handler pointer to the parse_packet() payload parsing function
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* @return a newly allocated RDTDemuxContext. Free with ff_rdt_parse_close().
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*/
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RDTDemuxContext *ff_rdt_parse_open(AVFormatContext *ic,
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int first_stream_of_set_idx,
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void *priv_data,
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RTPDynamicProtocolHandler *handler);
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void ff_rdt_parse_close(RDTDemuxContext *s);
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/**
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* Calculate the response (RealChallenge2 in the RTSP header) to the
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* challenge (RealChallenge1 in the RTSP header from the Real/Helix
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* server), which is used as some sort of client validation.
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*
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* @param response pointer to response buffer, it should be at least 41 bytes
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* (40 data + 1 zero) bytes long.
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* @param chksum pointer to buffer containing a checksum of the response,
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* it should be at least 9 (8 data + 1 zero) bytes long.
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* @param challenge pointer to the RealChallenge1 value provided by the
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* server.
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*/
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void ff_rdt_calc_response_and_checksum(char response[41], char chksum[9],
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const char *challenge);
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/**
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* Register RDT-related dynamic payload handlers with our cache.
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*/
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void ff_register_rdt_dynamic_payload_handlers(void);
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/**
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* Add subscription information to Subscribe parameter string.
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*
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* @param cmd string to write the subscription information into.
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* @param size size of cmd.
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* @param stream_nr stream number.
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* @param rule_nr rule number to conform to.
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*/
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void ff_rdt_subscribe_rule(char *cmd, int size,
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int stream_nr, int rule_nr);
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/**
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* Parse RDT-style packet header.
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*
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* @param buf input buffer
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* @param len length of input buffer
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* @param pset_id will be set to the set ID this packet belongs to
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* @param pseq_no will be set to the sequence number of the packet
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* @param pstream_id will be set to the stream ID this packet belongs to
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* @param pis_keyframe will be whether this packet belongs to a keyframe
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* @param ptimestamp will be set to the timestamp of the packet
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* @return the amount of bytes consumed, or negative on error
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*/
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int ff_rdt_parse_header(const uint8_t *buf, int len,
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int *pset_id, int *pseq_no, int *pstream_id,
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int *pis_keyframe, uint32_t *ptimestamp);
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/**
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* Parse RDT-style packet data (header + media data).
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* Usage similar to rtp_parse_packet().
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*/
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int ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt,
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uint8_t **buf, int len);
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/**
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* Parse a server-related SDP line.
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*
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* @param s the RTSP AVFormatContext
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* @param stream_index the index of the first stream in the set represented
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* by the SDP m= line (in s->streams)
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* @param buf the SDP line
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*/
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void ff_real_parse_sdp_a_line(AVFormatContext *s, int stream_index,
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const char *buf);
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#endif /* AVFORMAT_RDT_H */
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