250 lines
8.4 KiB
C
Executable File
250 lines
8.4 KiB
C
Executable File
/*
|
|
* Argonaut Games ASF 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"
|
|
|
|
#define ASF_TAG MKTAG('A', 'S', 'F', '\0')
|
|
#define ASF_FILE_HEADER_SIZE 24
|
|
#define ASF_CHUNK_HEADER_SIZE 20
|
|
|
|
typedef struct ArgoASFFileHeader {
|
|
uint32_t magic; /*< Magic Number, {'A', 'S', 'F', '\0'} */
|
|
uint16_t version_major; /*< File Major Version. */
|
|
uint16_t version_minor; /*< File Minor Version. */
|
|
uint32_t num_chunks; /*< No. chunks in the file. */
|
|
uint32_t chunk_offset; /*< Offset to the first chunk from the start of the file. */
|
|
int8_t name[8]; /*< Name. */
|
|
} ArgoASFFileHeader;
|
|
|
|
typedef struct ArgoASFChunkHeader {
|
|
uint32_t num_blocks; /*< No. blocks in the chunk. */
|
|
uint32_t num_samples; /*< No. samples per channel in a block. */
|
|
uint32_t unk1; /*< Unknown */
|
|
uint16_t sample_rate; /*< Sample rate. */
|
|
uint16_t unk2; /*< Unknown. */
|
|
uint32_t flags; /*< Stream flags. */
|
|
} ArgoASFChunkHeader;
|
|
|
|
enum {
|
|
ASF_CF_BITS_PER_SAMPLE = (1 << 0), /*< 16-bit if set, 8 otherwise. */
|
|
ASF_CF_STEREO = (1 << 1), /*< Stereo if set, mono otherwise. */
|
|
ASF_CF_ALWAYS1_1 = (1 << 2), /*< Unknown, always seems to be set. */
|
|
ASF_CF_ALWAYS1_2 = (1 << 3), /*< Unknown, always seems to be set. */
|
|
|
|
ASF_CF_ALWAYS1 = ASF_CF_ALWAYS1_1 | ASF_CF_ALWAYS1_2,
|
|
ASF_CF_ALWAYS0 = ~(ASF_CF_BITS_PER_SAMPLE | ASF_CF_STEREO | ASF_CF_ALWAYS1)
|
|
};
|
|
|
|
typedef struct ArgoASFDemuxContext {
|
|
ArgoASFFileHeader fhdr;
|
|
ArgoASFChunkHeader ckhdr;
|
|
uint32_t blocks_read;
|
|
} ArgoASFDemuxContext;
|
|
|
|
static void argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
|
|
{
|
|
hdr->magic = AV_RL32(buf + 0);
|
|
hdr->version_major = AV_RL16(buf + 4);
|
|
hdr->version_minor = AV_RL16(buf + 6);
|
|
hdr->num_chunks = AV_RL32(buf + 8);
|
|
hdr->chunk_offset = AV_RL32(buf + 12);
|
|
for (int i = 0; i < FF_ARRAY_ELEMS(hdr->name); i++)
|
|
hdr->name[i] = AV_RL8(buf + 16 + i);
|
|
}
|
|
|
|
static void argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
|
|
{
|
|
hdr->num_blocks = AV_RL32(buf + 0);
|
|
hdr->num_samples = AV_RL32(buf + 4);
|
|
hdr->unk1 = AV_RL32(buf + 8);
|
|
hdr->sample_rate = AV_RL16(buf + 12);
|
|
hdr->unk2 = AV_RL16(buf + 14);
|
|
hdr->flags = AV_RL32(buf + 16);
|
|
}
|
|
|
|
/*
|
|
* Known versions:
|
|
* 1.1: The sample files in /game-formats/brender/part2.zip
|
|
* 1.2: Croc! Legend of the Gobbos
|
|
* 2.1: Croc 2
|
|
*/
|
|
static int argo_asf_is_known_version(const ArgoASFFileHeader *hdr)
|
|
{
|
|
return (hdr->version_major == 1 && hdr->version_minor == 1) ||
|
|
(hdr->version_major == 1 && hdr->version_minor == 2) ||
|
|
(hdr->version_major == 2 && hdr->version_minor == 1);
|
|
}
|
|
|
|
static int argo_asf_probe(const AVProbeData *p)
|
|
{
|
|
ArgoASFFileHeader hdr;
|
|
|
|
av_assert0(AVPROBE_PADDING_SIZE >= ASF_FILE_HEADER_SIZE);
|
|
|
|
argo_asf_parse_file_header(&hdr, p->buf);
|
|
|
|
if (hdr.magic != ASF_TAG)
|
|
return 0;
|
|
|
|
if (!argo_asf_is_known_version(&hdr))
|
|
return AVPROBE_SCORE_EXTENSION / 2;
|
|
|
|
return AVPROBE_SCORE_EXTENSION + 1;
|
|
}
|
|
|
|
static int argo_asf_read_header(AVFormatContext *s)
|
|
{
|
|
int64_t ret;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st;
|
|
ArgoASFDemuxContext *asf = s->priv_data;
|
|
uint8_t buf[FFMAX(ASF_FILE_HEADER_SIZE, ASF_CHUNK_HEADER_SIZE)];
|
|
|
|
if (!(st = avformat_new_stream(s, NULL)))
|
|
return AVERROR(ENOMEM);
|
|
|
|
if ((ret = avio_read(pb, buf, ASF_FILE_HEADER_SIZE)) < 0)
|
|
return ret;
|
|
else if (ret != ASF_FILE_HEADER_SIZE)
|
|
return AVERROR(EIO);
|
|
|
|
argo_asf_parse_file_header(&asf->fhdr, buf);
|
|
|
|
if (!argo_asf_is_known_version(&asf->fhdr)) {
|
|
avpriv_request_sample(s, "Version %hu.%hu",
|
|
asf->fhdr.version_major, asf->fhdr.version_minor
|
|
);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if (asf->fhdr.num_chunks == 0) {
|
|
return AVERROR_INVALIDDATA;
|
|
} else if (asf->fhdr.num_chunks > 1) {
|
|
avpriv_request_sample(s, ">1 chunk");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if (asf->fhdr.chunk_offset < ASF_FILE_HEADER_SIZE)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if ((ret = avio_skip(pb, asf->fhdr.chunk_offset - ASF_FILE_HEADER_SIZE)) < 0)
|
|
return ret;
|
|
|
|
if ((ret = avio_read(pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
|
|
return ret;
|
|
else if (ret != ASF_CHUNK_HEADER_SIZE)
|
|
return AVERROR(EIO);
|
|
|
|
argo_asf_parse_chunk_header(&asf->ckhdr, buf);
|
|
|
|
if ((asf->ckhdr.flags & ASF_CF_ALWAYS1) != ASF_CF_ALWAYS1 || (asf->ckhdr.flags & ASF_CF_ALWAYS0) != 0) {
|
|
avpriv_request_sample(s, "Nonstandard flags (0x%08X)", asf->ckhdr.flags);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_ARGO;
|
|
st->codecpar->format = AV_SAMPLE_FMT_S16P;
|
|
|
|
if (asf->ckhdr.flags & ASF_CF_STEREO) {
|
|
st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
|
|
st->codecpar->channels = 2;
|
|
} else {
|
|
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
|
|
st->codecpar->channels = 1;
|
|
}
|
|
|
|
st->codecpar->sample_rate = asf->ckhdr.sample_rate;
|
|
|
|
st->codecpar->bits_per_coded_sample = 4;
|
|
|
|
if (asf->ckhdr.flags & ASF_CF_BITS_PER_SAMPLE)
|
|
st->codecpar->bits_per_raw_sample = 16;
|
|
else
|
|
st->codecpar->bits_per_raw_sample = 8;
|
|
|
|
if (st->codecpar->bits_per_raw_sample != 16) {
|
|
/* The header allows for these, but I've never seen any files with them. */
|
|
avpriv_request_sample(s, "Non 16-bit samples");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
/*
|
|
* (nchannel control bytes) + ((bytes_per_channel) * nchannel)
|
|
* For mono, this is 17. For stereo, this is 34.
|
|
*/
|
|
st->codecpar->frame_size = st->codecpar->channels +
|
|
(asf->ckhdr.num_samples / 2) *
|
|
st->codecpar->channels;
|
|
|
|
st->codecpar->block_align = st->codecpar->frame_size;
|
|
|
|
st->codecpar->bit_rate = st->codecpar->channels *
|
|
st->codecpar->sample_rate *
|
|
st->codecpar->bits_per_coded_sample;
|
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
st->start_time = 0;
|
|
st->duration = asf->ckhdr.num_blocks * asf->ckhdr.num_samples;
|
|
st->nb_frames = asf->ckhdr.num_blocks;
|
|
return 0;
|
|
}
|
|
|
|
static int argo_asf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
ArgoASFDemuxContext *asf = s->priv_data;
|
|
|
|
AVStream *st = s->streams[0];
|
|
AVIOContext *pb = s->pb;
|
|
int ret;
|
|
|
|
if (asf->blocks_read >= asf->ckhdr.num_blocks)
|
|
return AVERROR_EOF;
|
|
|
|
if ((ret = av_get_packet(pb, pkt, st->codecpar->frame_size)) < 0)
|
|
return ret;
|
|
else if (ret != st->codecpar->frame_size)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
pkt->stream_index = st->index;
|
|
pkt->duration = asf->ckhdr.num_samples;
|
|
|
|
++asf->blocks_read;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Not actually sure what ASF stands for.
|
|
* - Argonaut Sound File?
|
|
* - Audio Stream File?
|
|
*/
|
|
AVInputFormat ff_argo_asf_demuxer = {
|
|
.name = "argo_asf",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games ASF"),
|
|
.priv_data_size = sizeof(ArgoASFDemuxContext),
|
|
.read_probe = argo_asf_probe,
|
|
.read_header = argo_asf_read_header,
|
|
.read_packet = argo_asf_read_packet
|
|
};
|