mirror of https://git.ffmpeg.org/ffmpeg.git
293 lines
8.3 KiB
C
293 lines
8.3 KiB
C
/*
|
|
* LEGO Racers ALP (.tun & .pcm) (de)muxer
|
|
*
|
|
* 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 "rawenc.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/internal.h"
|
|
#include "libavutil/opt.h"
|
|
|
|
#define ALP_TAG MKTAG('A', 'L', 'P', ' ')
|
|
#define ALP_MAX_READ_SIZE 4096
|
|
|
|
typedef struct ALPHeader {
|
|
uint32_t magic; /*< Magic Number, {'A', 'L', 'P', ' '} */
|
|
uint32_t header_size; /*< Header size (after this). */
|
|
char adpcm[6]; /*< "ADPCM" */
|
|
uint8_t unk1; /*< Unknown */
|
|
uint8_t num_channels; /*< Channel Count. */
|
|
uint32_t sample_rate; /*< Sample rate, only if header_size >= 12. */
|
|
} ALPHeader;
|
|
|
|
typedef enum ALPType {
|
|
ALP_TYPE_AUTO = 0, /*< Autodetect based on file extension. */
|
|
ALP_TYPE_TUN = 1, /*< Force a .TUN file. */
|
|
ALP_TYPE_PCM = 2, /*< Force a .PCM file. */
|
|
} ALPType;
|
|
|
|
typedef struct ALPMuxContext {
|
|
const AVClass *class;
|
|
ALPType type;
|
|
} ALPMuxContext;
|
|
|
|
#if CONFIG_ALP_DEMUXER
|
|
static int alp_probe(const AVProbeData *p)
|
|
{
|
|
uint32_t i;
|
|
|
|
if (AV_RL32(p->buf) != ALP_TAG)
|
|
return 0;
|
|
|
|
/* Only allowed header sizes are 8 and 12. */
|
|
i = AV_RL32(p->buf + 4);
|
|
if (i != 8 && i != 12)
|
|
return 0;
|
|
|
|
if (strncmp("ADPCM", p->buf + 8, 6) != 0)
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX - 1;
|
|
}
|
|
|
|
static int alp_read_header(AVFormatContext *s)
|
|
{
|
|
int ret;
|
|
AVStream *st;
|
|
ALPHeader hdr;
|
|
AVCodecParameters *par;
|
|
|
|
if ((hdr.magic = avio_rl32(s->pb)) != ALP_TAG)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
hdr.header_size = avio_rl32(s->pb);
|
|
|
|
if (hdr.header_size != 8 && hdr.header_size != 12) {
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if ((ret = avio_read(s->pb, hdr.adpcm, sizeof(hdr.adpcm))) < 0)
|
|
return ret;
|
|
else if (ret != sizeof(hdr.adpcm))
|
|
return AVERROR(EIO);
|
|
|
|
if (strncmp("ADPCM", hdr.adpcm, sizeof(hdr.adpcm)) != 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
hdr.unk1 = avio_r8(s->pb);
|
|
hdr.num_channels = avio_r8(s->pb);
|
|
|
|
if (hdr.header_size == 8) {
|
|
/* .TUN music file */
|
|
hdr.sample_rate = 22050;
|
|
} else {
|
|
/* .PCM sound file */
|
|
hdr.sample_rate = avio_rl32(s->pb);
|
|
}
|
|
|
|
if (hdr.sample_rate > 44100) {
|
|
avpriv_request_sample(s, "Sample Rate > 44100");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if (!(st = avformat_new_stream(s, NULL)))
|
|
return AVERROR(ENOMEM);
|
|
|
|
par = st->codecpar;
|
|
par->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
par->codec_id = AV_CODEC_ID_ADPCM_IMA_ALP;
|
|
par->format = AV_SAMPLE_FMT_S16;
|
|
par->sample_rate = hdr.sample_rate;
|
|
par->channels = hdr.num_channels;
|
|
|
|
if (hdr.num_channels == 1)
|
|
par->channel_layout = AV_CH_LAYOUT_MONO;
|
|
else if (hdr.num_channels == 2)
|
|
par->channel_layout = AV_CH_LAYOUT_STEREO;
|
|
else
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
par->bits_per_coded_sample = 4;
|
|
par->bits_per_raw_sample = 16;
|
|
par->block_align = 1;
|
|
par->bit_rate = par->channels *
|
|
par->sample_rate *
|
|
par->bits_per_coded_sample;
|
|
|
|
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
|
|
return 0;
|
|
}
|
|
|
|
static int alp_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret;
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
|
|
if ((ret = av_get_packet(s->pb, pkt, ALP_MAX_READ_SIZE)) < 0)
|
|
return ret;
|
|
|
|
pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
|
|
pkt->stream_index = 0;
|
|
pkt->duration = ret * 2 / par->channels;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_alp_demuxer = {
|
|
.name = "alp",
|
|
.long_name = NULL_IF_CONFIG_SMALL("LEGO Racers ALP"),
|
|
.read_probe = alp_probe,
|
|
.read_header = alp_read_header,
|
|
.read_packet = alp_read_packet
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_ALP_MUXER
|
|
|
|
static int alp_write_init(AVFormatContext *s)
|
|
{
|
|
ALPMuxContext *alp = s->priv_data;
|
|
AVCodecParameters *par;
|
|
|
|
if (alp->type == ALP_TYPE_AUTO) {
|
|
if (av_match_ext(s->url, "pcm"))
|
|
alp->type = ALP_TYPE_PCM;
|
|
else
|
|
alp->type = ALP_TYPE_TUN;
|
|
}
|
|
|
|
if (s->nb_streams != 1) {
|
|
av_log(s, AV_LOG_ERROR, "Too many streams\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
par = s->streams[0]->codecpar;
|
|
|
|
if (par->codec_id != AV_CODEC_ID_ADPCM_IMA_ALP) {
|
|
av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
|
|
avcodec_get_name(par->codec_id));
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (par->channels > 2) {
|
|
av_log(s, AV_LOG_ERROR, "A maximum of 2 channels are supported\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (par->sample_rate > 44100) {
|
|
av_log(s, AV_LOG_ERROR, "Sample rate too large\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (alp->type == ALP_TYPE_TUN && par->sample_rate != 22050) {
|
|
av_log(s, AV_LOG_ERROR, "Sample rate must be 22050 for TUN files\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int alp_write_header(AVFormatContext *s)
|
|
{
|
|
ALPMuxContext *alp = s->priv_data;
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
|
|
avio_wl32(s->pb, ALP_TAG);
|
|
avio_wl32(s->pb, alp->type == ALP_TYPE_PCM ? 12 : 8);
|
|
avio_write(s->pb, "ADPCM", 6);
|
|
avio_w8(s->pb, 0);
|
|
avio_w8(s->pb, par->channels);
|
|
if (alp->type == ALP_TYPE_PCM)
|
|
avio_wl32(s->pb, par->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
enum { AE = AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM };
|
|
|
|
static const AVOption alp_options[] = {
|
|
{
|
|
.name = "type",
|
|
.help = "set file type",
|
|
.offset = offsetof(ALPMuxContext, type),
|
|
.type = AV_OPT_TYPE_INT,
|
|
.default_val = {.i64 = ALP_TYPE_AUTO},
|
|
.min = ALP_TYPE_AUTO,
|
|
.max = ALP_TYPE_PCM,
|
|
.flags = AE,
|
|
.unit = "type",
|
|
},
|
|
{
|
|
.name = "auto",
|
|
.help = "autodetect based on file extension",
|
|
.offset = 0,
|
|
.type = AV_OPT_TYPE_CONST,
|
|
.default_val = {.i64 = ALP_TYPE_AUTO},
|
|
.min = 0,
|
|
.max = 0,
|
|
.flags = AE,
|
|
.unit = "type"
|
|
},
|
|
{
|
|
.name = "tun",
|
|
.help = "force .tun, used for music",
|
|
.offset = 0,
|
|
.type = AV_OPT_TYPE_CONST,
|
|
.default_val = {.i64 = ALP_TYPE_TUN},
|
|
.min = 0,
|
|
.max = 0,
|
|
.flags = AE,
|
|
.unit = "type"
|
|
},
|
|
{
|
|
.name = "pcm",
|
|
.help = "force .pcm, used for sfx",
|
|
.offset = 0,
|
|
.type = AV_OPT_TYPE_CONST,
|
|
.default_val = {.i64 = ALP_TYPE_PCM},
|
|
.min = 0,
|
|
.max = 0,
|
|
.flags = AE,
|
|
.unit = "type"
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVClass alp_muxer_class = {
|
|
.class_name = "alp",
|
|
.item_name = av_default_item_name,
|
|
.option = alp_options,
|
|
.version = LIBAVUTIL_VERSION_INT
|
|
};
|
|
|
|
AVOutputFormat ff_alp_muxer = {
|
|
.name = "alp",
|
|
.long_name = NULL_IF_CONFIG_SMALL("LEGO Racers ALP"),
|
|
.extensions = "tun,pcm",
|
|
.audio_codec = AV_CODEC_ID_ADPCM_IMA_ALP,
|
|
.video_codec = AV_CODEC_ID_NONE,
|
|
.init = alp_write_init,
|
|
.write_header = alp_write_header,
|
|
.write_packet = ff_raw_write_packet,
|
|
.priv_class = &alp_muxer_class,
|
|
.priv_data_size = sizeof(ALPMuxContext)
|
|
};
|
|
#endif
|