mirror of
https://git.ffmpeg.org/ffmpeg.git
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981d49e373
Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
424 lines
14 KiB
C
424 lines
14 KiB
C
/*
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* Argonaut Games BRP Demuxer
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*
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* Copyright (C) 2020 Zane van Iperen (zane@zanevaniperen.com)
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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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#include "avformat.h"
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#include "internal.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avassert.h"
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#include "libavutil/internal.h"
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#include "argo_asf.h"
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#define BRP_TAG MKTAG('B', 'R', 'P', 'P')
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#define BRP_FILE_HEADER_SIZE 12
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#define BRP_BLOCK_HEADER_SIZE 12
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#define BRP_STREAM_HEADER_SIZE 20
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#define BRP_MAX_STREAMS 32 /* Soft cap, but even this is overkill. */
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#define BRP_BASF_LOOKAHEAD 10 /* How many blocks to search for the first BASF one. */
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#define BVID_HEADER_SIZE 16
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#define MASK_HEADER_SIZE 12
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#define BRP_MIN_BUFFER_SIZE FFMAX3(FFMAX3(BRP_FILE_HEADER_SIZE, \
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BRP_BLOCK_HEADER_SIZE, \
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BRP_STREAM_HEADER_SIZE), \
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BVID_HEADER_SIZE, \
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MASK_HEADER_SIZE)
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#define BRP_CODEC_ID_BVID MKTAG('B', 'V', 'I', 'D')
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#define BRP_CODEC_ID_BASF MKTAG('B', 'A', 'S', 'F')
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#define BRP_CODEC_ID_MASK MKTAG('M', 'A', 'S', 'K')
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typedef struct ArgoBRPFileHeader {
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uint32_t magic;
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uint32_t num_streams;
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uint32_t byte_rate;
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} ArgoBRPFileHeader;
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typedef struct ArgoBRPBlockHeader {
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int32_t stream_id;
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uint32_t start_ms;
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uint32_t size;
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} ArgoBRPBlockHeader;
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typedef struct ArgoBVIDHeader {
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uint32_t num_frames;
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uint32_t width;
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uint32_t height;
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uint32_t depth;
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} ArgoBVIDHeader;
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typedef struct ArgoMASKHeader {
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uint32_t num_frames;
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uint32_t width;
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uint32_t height;
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} ArgoMASKHeader;
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typedef struct ArgoBRPStreamHeader {
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uint32_t codec_id;
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uint32_t id;
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uint32_t duration_ms;
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uint32_t byte_rate;
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uint32_t extradata_size;
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union
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{
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/* If codec_id == BRP_CODEC_ID_BVID */
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ArgoBVIDHeader bvid;
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/* If codec_id == BRP_CODEC_ID_BASF */
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ArgoASFFileHeader basf;
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/* If codec_id == BRP_CODEC_ID_MASK */
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ArgoMASKHeader mask;
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} extradata;
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} ArgoBRPStreamHeader;
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typedef struct ArgoBRPDemuxContext {
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ArgoBRPFileHeader fhdr;
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ArgoBRPStreamHeader streams[BRP_MAX_STREAMS];
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struct {
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int index;
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ArgoASFChunkHeader ckhdr;
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} basf;
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} ArgoBRPDemuxContext;
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static int argo_brp_probe(const AVProbeData *p)
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{
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if (AV_RL32(p->buf) != BRP_TAG)
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return 0;
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return AVPROBE_SCORE_EXTENSION + 1;
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}
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static int read_extradata(AVFormatContext *s, const ArgoBRPStreamHeader *hdr,
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void *buf, size_t bufsz)
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{
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const char *name;
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uint32_t size;
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int64_t ret;
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if (hdr->codec_id == BRP_CODEC_ID_BVID) {
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name = "BVID";
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size = BVID_HEADER_SIZE;
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} else if (hdr->codec_id == BRP_CODEC_ID_BASF) {
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name = "BASF";
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size = ASF_FILE_HEADER_SIZE;
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} else if (hdr->codec_id == BRP_CODEC_ID_MASK) {
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name = "MASK";
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size = MASK_HEADER_SIZE;
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} else {
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avpriv_request_sample(s, "BRP codec id 0x%x", hdr->codec_id);
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if ((ret = avio_skip(s->pb, hdr->extradata_size)) < 0)
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return ret;
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return 1;
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}
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if (hdr->extradata_size != size) {
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av_log(s, AV_LOG_ERROR, "Invalid %s extradata size %u, expected %u\n",
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name, hdr->extradata_size, size);
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return AVERROR_INVALIDDATA;
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}
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av_assert0(bufsz >= size);
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if ((ret = avio_read(s->pb, buf, size)) < 0)
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return ret;
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if (ret != size)
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return AVERROR(EIO);
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return 0;
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}
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static int argo_brp_read_header(AVFormatContext *s)
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{
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int64_t ret;
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AVIOContext *pb = s->pb;
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ArgoBRPDemuxContext *brp = s->priv_data;
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uint8_t buf[FFMAX(BRP_MIN_BUFFER_SIZE, ASF_MIN_BUFFER_SIZE)];
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if ((ret = avio_read(pb, buf, BRP_FILE_HEADER_SIZE)) < 0)
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return ret;
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else if (ret != BRP_FILE_HEADER_SIZE)
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return AVERROR(EIO);
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brp->fhdr.magic = AV_RL32(buf + 0);
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brp->fhdr.num_streams = AV_RL32(buf + 4);
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brp->fhdr.byte_rate = AV_RL32(buf + 8);
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if (brp->fhdr.magic != BRP_TAG)
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return AVERROR_INVALIDDATA;
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if (brp->fhdr.num_streams > BRP_MAX_STREAMS) {
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avpriv_request_sample(s, ">%d streams", BRP_MAX_STREAMS);
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return AVERROR_PATCHWELCOME;
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}
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/* Build the stream info. */
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brp->basf.index = -1;
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for (uint32_t i = 0; i < brp->fhdr.num_streams; i++) {
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ArgoBRPStreamHeader *hdr = brp->streams + i;
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AVStream *st;
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if (!(st = avformat_new_stream(s, NULL)))
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return AVERROR(ENOMEM);
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if ((ret = avio_read(pb, buf, BRP_STREAM_HEADER_SIZE)) < 0)
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return ret;
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else if (ret != BRP_STREAM_HEADER_SIZE)
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return AVERROR(EIO);
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hdr->codec_id = AV_RL32(buf + 0);
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hdr->id = AV_RL32(buf + 4);
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hdr->duration_ms = AV_RL32(buf + 8);
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hdr->byte_rate = AV_RL32(buf + 12);
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hdr->extradata_size = AV_RL32(buf + 16);
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/* This should always be the case. */
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if (hdr->id != i)
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return AVERROR_INVALIDDATA;
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/* Timestamps are in milliseconds. */
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avpriv_set_pts_info(st, 64, 1, 1000);
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st->duration = hdr->duration_ms;
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st->codecpar->bit_rate = hdr->byte_rate * 8;
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if ((ret = read_extradata(s, hdr, buf, sizeof(buf))) < 0) {
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return ret;
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} else if (ret > 0) {
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st->codecpar->codec_type = AVMEDIA_TYPE_UNKNOWN;
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continue;
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}
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if (hdr->codec_id == BRP_CODEC_ID_BVID) {
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ArgoBVIDHeader *bvid = &hdr->extradata.bvid;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_ARGO;
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bvid->num_frames = AV_RL32(buf + 0);
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bvid->width = AV_RL32(buf + 4);
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bvid->height = AV_RL32(buf + 8);
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bvid->depth = AV_RL32(buf + 12);
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if (bvid->num_frames == 0)
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return AVERROR_INVALIDDATA;
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/* These are from 1990's games, sanity check this. */
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if (bvid->width >= 65536 || bvid->height >= 65536 ||
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bvid->depth > 24 || bvid->depth % 8 != 0) {
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return AVERROR_INVALIDDATA;
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}
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st->codecpar->width = bvid->width;
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st->codecpar->height = bvid->height;
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st->nb_frames = bvid->num_frames;
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st->codecpar->bits_per_coded_sample = bvid->depth;
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} else if (hdr->codec_id == BRP_CODEC_ID_BASF) {
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/*
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* It would make the demuxer significantly more complicated
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* to support multiple BASF streams. I've never seen a file
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* with more than one.
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*/
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if (brp->basf.index >= 0) {
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avpriv_request_sample(s, "Multiple BASF streams");
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return AVERROR_PATCHWELCOME;
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}
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_ARGO;
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brp->basf.index = i;
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ff_argo_asf_parse_file_header(&hdr->extradata.basf, buf);
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if ((ret = ff_argo_asf_validate_file_header(s, &hdr->extradata.basf)) < 0)
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return ret;
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st->nb_frames = hdr->extradata.basf.num_chunks;
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} else if (hdr->codec_id == BRP_CODEC_ID_MASK) {
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ArgoMASKHeader *mask = &hdr->extradata.mask;
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st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
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mask->num_frames = AV_RL32(buf + 0);
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mask->width = AV_RL32(buf + 4);
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mask->height = AV_RL32(buf + 8);
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st->nb_frames = mask->num_frames;
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} else {
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av_assert0(0); /* Caught above, should never happen. */
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}
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}
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/* Try to find the first BASF chunk. */
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if (brp->basf.index >= 0) {
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AVStream *st = s->streams[brp->basf.index];
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ArgoBRPStreamHeader *hdr = brp->streams + brp->basf.index;
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ArgoBRPBlockHeader blk;
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int64_t offset;
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int i;
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av_assert0(st->codecpar->codec_id == AV_CODEC_ID_ADPCM_ARGO);
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av_assert0(brp->streams[brp->basf.index].extradata_size == ASF_FILE_HEADER_SIZE);
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if ((ret = avio_tell(s->pb)) < 0)
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return ret;
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offset = ret;
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av_log(s, AV_LOG_TRACE, "Searching %d blocks for BASF...", BRP_BASF_LOOKAHEAD);
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for (i = 0; i < BRP_BASF_LOOKAHEAD; i++) {
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if ((ret = avio_read(pb, buf, BRP_BLOCK_HEADER_SIZE)) < 0)
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return ret;
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else if (ret != BRP_BLOCK_HEADER_SIZE)
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return AVERROR(EIO);
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blk.stream_id = AV_RL32(buf + 0);
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blk.start_ms = AV_RL32(buf + 4);
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blk.size = AV_RL32(buf + 8);
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if (blk.stream_id == brp->basf.index || blk.stream_id == -1)
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break;
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if ((ret = avio_skip(pb, blk.size)) < 0)
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return ret;
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}
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if (i == BRP_BASF_LOOKAHEAD || blk.stream_id == -1) {
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/* Don't error here, as there may still be a valid video stream. */
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av_log(s, AV_LOG_TRACE, "not found\n");
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goto done;
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}
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av_log(s, AV_LOG_TRACE, "found at index %d\n", i);
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if (blk.size < ASF_CHUNK_HEADER_SIZE)
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return AVERROR_INVALIDDATA;
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if ((ret = avio_read(pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
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return ret;
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else if (ret != ASF_CHUNK_HEADER_SIZE)
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return AVERROR(EIO);
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ff_argo_asf_parse_chunk_header(&brp->basf.ckhdr, buf);
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/*
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* Special Case Hack. It seems that in files where the BASF block isn't first,
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* v1.1 streams are allowed to be non-22050...
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* Bump the version to 1.2 so ff_argo_asf_fill_stream() doesn't "correct" it.
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*
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* Found in Alien Odyssey games files in:
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* ./GRAPHICS/COMMBUNK/{{COMADD1,COMM2_{1,2,3E},COMM3_{2,3,4,5,6}},FADE{1,2}}.BRP
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*
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* Either this format really inconsistent, or FX Fighter and Croc just ignored the
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* sample rate field...
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*/
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if (i != 0 && hdr->extradata.basf.version_major == 1 && hdr->extradata.basf.version_minor == 1)
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hdr->extradata.basf.version_minor = 2;
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if ((ret = ff_argo_asf_fill_stream(s, st, &hdr->extradata.basf, &brp->basf.ckhdr)) < 0)
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return ret;
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/* Convert ms to samples. */
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st->start_time = av_rescale_rnd(blk.start_ms, st->codecpar->sample_rate, 1000, AV_ROUND_UP);
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st->duration = av_rescale_rnd(hdr->duration_ms, st->codecpar->sample_rate, 1000, AV_ROUND_UP);
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done:
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if ((ret = avio_seek(s->pb, offset, SEEK_SET)) < 0)
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return ret;
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}
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return 0;
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}
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static int argo_brp_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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ArgoBRPDemuxContext *brp = s->priv_data;
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ArgoBRPBlockHeader blk;
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const ArgoBRPStreamHeader *shdr;
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AVStream *st;
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uint8_t buf[BRP_MIN_BUFFER_SIZE];
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ArgoASFChunkHeader ckhdr;
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int ret;
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if ((ret = avio_read(s->pb, buf, BRP_BLOCK_HEADER_SIZE)) < 0)
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return ret;
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else if (ret != BRP_BLOCK_HEADER_SIZE)
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return AVERROR(EIO);
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blk.stream_id = AV_RL32(buf + 0);
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blk.start_ms = AV_RL32(buf + 4);
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blk.size = AV_RL32(buf + 8);
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if (blk.stream_id == -1)
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return AVERROR_EOF;
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if (blk.stream_id < -1 || blk.stream_id >= s->nb_streams)
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return AVERROR_INVALIDDATA;
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st = s->streams[blk.stream_id];
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shdr = brp->streams + blk.stream_id;
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if (blk.stream_id == brp->basf.index) {
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if (blk.size < ASF_CHUNK_HEADER_SIZE)
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return AVERROR_INVALIDDATA;
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if ((ret = avio_read(s->pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
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return ret;
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ff_argo_asf_parse_chunk_header(&ckhdr, buf);
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/* Ensure the chunk attributes are the same. */
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if (ckhdr.sample_rate != brp->basf.ckhdr.sample_rate ||
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ckhdr.flags != brp->basf.ckhdr.flags ||
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ckhdr.unk1 != brp->basf.ckhdr.unk1 ||
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ckhdr.unk2 != brp->basf.ckhdr.unk2)
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return AVERROR_INVALIDDATA;
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blk.size -= ASF_CHUNK_HEADER_SIZE;
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}
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if ((ret = av_get_packet(s->pb, pkt, blk.size)) < 0)
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return ret;
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else if (ret != blk.size)
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return AVERROR_INVALIDDATA;
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if (blk.stream_id == brp->basf.index) {
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pkt->duration = ckhdr.num_samples * ckhdr.num_blocks;
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pkt->pts = av_rescale_rnd(blk.start_ms, ckhdr.sample_rate, 1000, AV_ROUND_UP);
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} else if (shdr->codec_id == BRP_CODEC_ID_BVID) {
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pkt->duration = av_rescale_rnd(1, st->duration, shdr->extradata.bvid.num_frames, AV_ROUND_UP);
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pkt->pts = blk.start_ms;
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} else {
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pkt->pts = blk.start_ms;
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}
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pkt->stream_index = blk.stream_id;
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return 0;
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}
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const AVInputFormat ff_argo_brp_demuxer = {
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.name = "argo_brp",
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.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games BRP"),
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.priv_data_size = sizeof(ArgoBRPDemuxContext),
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.read_probe = argo_brp_probe,
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.read_header = argo_brp_read_header,
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.read_packet = argo_brp_read_packet,
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};
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