har0ke/FFmpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
FFmpeg/libavformat/argo_brp.c
Zane van Iperen 52d362c6e0
avformat/argo_{asf,brp}: use variable frame sizes when (de)muxing adpcm_argo 
Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
2020-09-19 15:55:00 +10:00

450 lines
13 KiB
C
Raw Blame History

/*
* Argonaut Games BRP Demuxer
*
* Copyright (C) 2020 Zane van Iperen (zane@zanevaniperen.com)
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/avassert.h"
#include "libavutil/internal.h"
#include "argo_asf.h"
#define BRP_TAG MKTAG('B', 'R', 'P', 'P')
#define BRP_FILE_HEADER_SIZE 12
#define BRP_BLOCK_HEADER_SIZE 12
#define BRP_STREAM_HEADER_SIZE 20
#define BRP_MAX_STREAMS 32 /* Soft cap, but even this is overkill. */
#define BVID_HEADER_SIZE 16
#define BRP_MIN_BUFFER_SIZE FFMAX(FFMAX3(BRP_FILE_HEADER_SIZE, \
BRP_BLOCK_HEADER_SIZE, \
BRP_STREAM_HEADER_SIZE), \
BVID_HEADER_SIZE)
#define BRP_CODEC_ID_BVID MKTAG('B', 'V', 'I', 'D')
#define BRP_CODEC_ID_BASF MKTAG('B', 'A', 'S', 'F')
typedef struct ArgoBRPFileHeader {
uint32_t magic;
uint32_t num_streams;
uint32_t byte_rate;
} ArgoBRPFileHeader;
typedef struct ArgoBRPBlockHeader {
int32_t stream_id;
uint32_t start_ms;
uint32_t size;
} ArgoBRPBlockHeader;
typedef struct ArgoBVIDHeader {
uint32_t num_frames;
uint32_t width;
uint32_t height;
uint32_t depth;
} ArgoBVIDHeader;
typedef struct ArgoBRPStreamHeader {
uint32_t codec_id;
uint32_t id;
uint32_t duration_ms;
uint32_t byte_rate;
uint32_t extradata_size;
union
{
/* If codec_id == BRP_CODEC_ID_BVID */
ArgoBVIDHeader bvid;
/* If codec_id == BRP_CODEC_ID_BASF */
ArgoASFFileHeader basf;
} extradata;
} ArgoBRPStreamHeader;
typedef struct ArgoBRPDemuxContext {
ArgoBRPFileHeader fhdr;
ArgoBRPStreamHeader *streams;
/* To know how much of a BASF to give. */
int64_t lastpts;
int hit_eof;
/* BASF-specific fields. */
struct {
int index;
ArgoASFChunkHeader ckhdr;
int64_t blocks_read;
int64_t offset;
/* ms, not samples. */
int64_t lastpts;
} basf;
} ArgoBRPDemuxContext;
static int argo_brp_probe(const AVProbeData *p)
{
if (AV_RL32(p->buf) != BRP_TAG)
return 0;
return AVPROBE_SCORE_EXTENSION + 1;
}
static int argo_brp_read_close(AVFormatContext *s)
{
ArgoBRPDemuxContext *brp = s->priv_data;
if (brp->streams != NULL)
av_freep(&brp->streams);
return 0;
}
static int read_extradata(AVFormatContext *s, const ArgoBRPStreamHeader *hdr,
void *buf, size_t bufsz)
{
const char *name;
uint32_t size;
int64_t ret;
if (hdr->codec_id == BRP_CODEC_ID_BVID) {
name = "BVID";
size = BVID_HEADER_SIZE;
} else if (hdr->codec_id == BRP_CODEC_ID_BASF) {
name = "BASF";
size = ASF_FILE_HEADER_SIZE;
} else {
avpriv_request_sample(s, "BRP codec id 0x%x", hdr->codec_id);
if ((ret = avio_skip(s->pb, hdr->extradata_size)) < 0)
return ret;
return 1;
}
if (hdr->extradata_size != size) {
av_log(s, AV_LOG_ERROR, "Invalid %s extradata size %u, expected %u\n",
name, hdr->extradata_size, size);
return AVERROR_INVALIDDATA;
}
av_assert0(bufsz >= size);
if ((ret = avio_read(s->pb, buf, size)) < 0)
return ret;
if (ret != size)
return AVERROR(EIO);
return 0;
}
static int argo_brp_read_header(AVFormatContext *s)
{
int64_t ret;
AVIOContext *pb = s->pb;
ArgoBRPDemuxContext *brp = s->priv_data;
uint8_t buf[FFMAX(BRP_MIN_BUFFER_SIZE, ASF_MIN_BUFFER_SIZE)];
if ((ret = avio_read(pb, buf, BRP_FILE_HEADER_SIZE)) < 0)
return ret;
else if (ret != BRP_FILE_HEADER_SIZE)
return AVERROR(EIO);
brp->fhdr.magic = AV_RL32(buf + 0);
brp->fhdr.num_streams = AV_RL32(buf + 4);
brp->fhdr.byte_rate = AV_RL32(buf + 8);
if (brp->fhdr.magic != BRP_TAG)
return AVERROR_INVALIDDATA;
if (brp->fhdr.num_streams > BRP_MAX_STREAMS) {
avpriv_request_sample(s, ">%d streams", BRP_MAX_STREAMS);
return AVERROR_PATCHWELCOME;
}
if ((brp->streams = av_mallocz_array(brp->fhdr.num_streams, sizeof(ArgoBRPStreamHeader))) == NULL)
return AVERROR(ENOMEM);
/* Build the stream info. */
brp->basf.index = -1;
for (uint32_t i = 0; i < brp->fhdr.num_streams; i++) {
ArgoBRPStreamHeader *hdr = brp->streams + i;
AVStream *st;
if (!(st = avformat_new_stream(s, NULL))) {
ret = AVERROR(ENOMEM);
goto fail;
}
if ((ret = avio_read(pb, buf, BRP_STREAM_HEADER_SIZE)) < 0) {
goto fail;
} else if (ret != BRP_STREAM_HEADER_SIZE) {
ret = AVERROR(EIO);
goto fail;
}
hdr->codec_id = AV_RL32(buf + 0);
hdr->id = AV_RL32(buf + 4);
hdr->duration_ms = AV_RL32(buf + 8);
hdr->byte_rate = AV_RL32(buf + 12);
hdr->extradata_size = AV_RL32(buf + 16);
/* Timestamps are in milliseconds. */
avpriv_set_pts_info(st, 64, 1, 1000);
st->duration = hdr->duration_ms;
st->codecpar->bit_rate = hdr->byte_rate * 8;
if ((ret = read_extradata(s, hdr, buf, sizeof(buf))) < 0) {
goto fail;
} else if (ret > 0) {
st->codecpar->codec_type = AVMEDIA_TYPE_UNKNOWN;
continue;
}
if (hdr->codec_id == BRP_CODEC_ID_BVID) {
ArgoBVIDHeader *bvid = &hdr->extradata.bvid;
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
/* No decoder for this yet. */
st->codecpar->codec_id = AV_CODEC_ID_NONE;
bvid->num_frames = AV_RL32(buf + 0);
bvid->width = AV_RL32(buf + 4);
bvid->height = AV_RL32(buf + 8);
bvid->depth = AV_RL32(buf + 12);
/* These are from 1990's games, sanity check this. */
if (bvid->width >= 65536 || bvid->height >= 65536 ||
bvid->depth > 24 || bvid->depth % 8 != 0) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
st->codecpar->width = bvid->width;
st->codecpar->height = bvid->height;
if (bvid->depth == 8) {
st->codecpar->format = AV_PIX_FMT_PAL8;
} else if (bvid->depth == 24) {
st->codecpar->format = AV_PIX_FMT_RGB24;
} else {
avpriv_request_sample(s, "depth == %u", bvid->depth);
ret = AVERROR_PATCHWELCOME;
goto fail;
}
} else if (hdr->codec_id == BRP_CODEC_ID_BASF) {
/*
* It would make the demuxer significantly more complicated
* to support multiple BASF streams. I've never seen a file
* with more than one.
*/
if (brp->basf.index >= 0) {
avpriv_request_sample(s, "Multiple BASF streams");
ret = AVERROR_PATCHWELCOME;
goto fail;
}
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_ARGO;
brp->basf.index = i;
ff_argo_asf_parse_file_header(&hdr->extradata.basf, buf);
if ((ret = ff_argo_asf_validate_file_header(s, &hdr->extradata.basf)) < 0)
goto fail;
} else {
av_assert0(0); /* Caught above, should never happen. */
}
}
/*
* This is nasty. BASF streams only have one (huge) block.
* It should be the first one. It contains the chunk header, so
* it needs to be read here.
*/
if (brp->basf.index >= 0) {
AVStream *st = s->streams[brp->basf.index];
ArgoBRPStreamHeader *hdr = brp->streams + brp->basf.index;
ArgoBRPBlockHeader blk;
av_assert0(st->codecpar->codec_id == AV_CODEC_ID_ADPCM_ARGO);
av_assert0(brp->streams[brp->basf.index].extradata_size == ASF_FILE_HEADER_SIZE);
if ((ret = avio_read(pb, buf, BRP_BLOCK_HEADER_SIZE)) < 0)
goto fail;
else if (ret != BRP_BLOCK_HEADER_SIZE) {
ret = AVERROR(EIO);
goto fail;
}
blk.stream_id = AV_RL32(buf + 0);
blk.start_ms = AV_RL32(buf + 4);
blk.size = AV_RL32(buf + 8);
if (blk.stream_id != brp->basf.index) {
avpriv_request_sample(st, "first block not BASF");
ret = AVERROR_PATCHWELCOME;
goto fail;
}
if (blk.size < ASF_CHUNK_HEADER_SIZE) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
if ((ret = avio_read(pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
goto fail;
else if (ret != ASF_CHUNK_HEADER_SIZE) {
ret = AVERROR(EIO);
goto fail;
}
ff_argo_asf_parse_chunk_header(&brp->basf.ckhdr, buf);
if ((ret = ff_argo_asf_fill_stream(st, &hdr->extradata.basf, &brp->basf.ckhdr)) < 0)
goto fail;
/* Convert ms to samples. */
st->start_time = (blk.start_ms * st->codecpar->sample_rate) / 1000;
if ((ret = avio_tell(s->pb)) < 0)
goto fail;
brp->basf.offset = ret;
if ((ret = avio_skip(s->pb, blk.size - ASF_CHUNK_HEADER_SIZE)) < 0)
goto fail;
}
return 0;
fail:
/* TODO: Remove once AVFMT_HEADER_CLEANUP lands. */
argo_brp_read_close(s);
return ret;
}
static int argo_brp_read_basf(AVFormatContext *s, AVPacket *pkt,
ArgoBRPDemuxContext *brp, int ignorepts)
{
ArgoASFChunkHeader *ckhdr = &brp->basf.ckhdr;
AVCodecParameters *par;
int64_t ret, old;
if (brp->basf.index < 0)
return 0;
par = s->streams[brp->basf.index]->codecpar;
if (brp->basf.blocks_read >= ckhdr->num_blocks)
return 0;
if (!ignorepts && brp->lastpts < brp->basf.lastpts)
return 0;
if ((ret = avio_tell(s->pb)) < 0)
return ret;
old = ret;
if ((ret = avio_seek(s->pb, brp->basf.offset, SEEK_SET)) < 0)
return ret;
else if (ret != brp->basf.offset)
return AVERROR(EIO);
if ((ret = av_get_packet(s->pb, pkt, par->block_align)) < 0)
return ret;
if ((ret = avio_seek(s->pb, old, SEEK_SET)) < 0)
return ret;
else if (ret != old)
return AVERROR(EIO);
pkt->stream_index = brp->basf.index;
pkt->duration = ckhdr->num_samples;
brp->basf.offset += pkt->size;
brp->basf.blocks_read += 1;
/* Need the ceil() because ((32 * 1000) / 44100) < 1 */
brp->basf.lastpts += ceilf((ckhdr->num_samples * 1000.0f) / ckhdr->sample_rate);
return 1;
}
static int argo_brp_read_packet(AVFormatContext *s, AVPacket *pkt)
{
ArgoBRPDemuxContext *brp = s->priv_data;
ArgoBRPBlockHeader blk;
AVIOContext *pb = s->pb;
uint8_t buf[BRP_BLOCK_HEADER_SIZE];
int ret;
/*
* Special-case: send some more BASF content if we're running behind.
* Grr, why couldn't they just interleave it.
*/
if ((ret = argo_brp_read_basf(s, pkt, brp, brp->hit_eof)) < 0)
return ret;
else if (ret > 0)
return 0;
if (brp->hit_eof)
return AVERROR_EOF;
if ((ret = avio_read(pb, buf, BRP_BLOCK_HEADER_SIZE)) < 0)
return ret;
else if (ret != BRP_BLOCK_HEADER_SIZE)
return AVERROR(EIO);
blk.stream_id = AV_RL32(buf + 0);
blk.start_ms = AV_RL32(buf + 4);
blk.size = AV_RL32(buf + 8);
/* This is meant to be EOF, but there might be more BASF packets. */
if (blk.stream_id == -1) {
brp->hit_eof = 1;
/* This is nasty, but safe. */
return argo_brp_read_packet(s, pkt);
}
if (blk.stream_id < -1 || blk.stream_id >= s->nb_streams)
return AVERROR_INVALIDDATA;
/* Skip BASF blocks. */
if (blk.stream_id == brp->basf.index) {
if ((ret = avio_skip(s->pb, blk.size)) < 0)
return ret;
} else {
if ((ret = av_get_packet(s->pb, pkt, blk.size)) < 0)
return ret;
else if (ret != blk.size)
return AVERROR_INVALIDDATA;
}
pkt->stream_index = blk.stream_id;
pkt->pts = blk.start_ms;
brp->lastpts = FFMAX(brp->lastpts, blk.start_ms);
return 0;
}
AVInputFormat ff_argo_brp_demuxer = {
.name = "argo_brp",
.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games BRP"),
.priv_data_size = sizeof(ArgoBRPDemuxContext),
.read_probe = argo_brp_probe,
.read_header = argo_brp_read_header,
.read_packet = argo_brp_read_packet,
.read_close = argo_brp_read_close
};
Reference in New Issue View Git Blame Copy Permalink