mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-06 10:37:41 +00:00
291 lines
8.4 KiB
C
291 lines
8.4 KiB
C
/*
|
|
* IFF (.iff) file demuxer
|
|
* Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net>
|
|
* Copyright (c) 2010 Peter Ross <pross@xvid.org>
|
|
* Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* IFF file demuxer
|
|
* by Jaikrishnan Menon
|
|
* for more information on the .iff file format, visit:
|
|
* http://wiki.multimedia.cx/index.php?title=IFF
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/dict.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
#define ID_8SVX MKTAG('8','S','V','X')
|
|
#define ID_VHDR MKTAG('V','H','D','R')
|
|
#define ID_ATAK MKTAG('A','T','A','K')
|
|
#define ID_RLSE MKTAG('R','L','S','E')
|
|
#define ID_CHAN MKTAG('C','H','A','N')
|
|
#define ID_PBM MKTAG('P','B','M',' ')
|
|
#define ID_ILBM MKTAG('I','L','B','M')
|
|
#define ID_BMHD MKTAG('B','M','H','D')
|
|
#define ID_CMAP MKTAG('C','M','A','P')
|
|
|
|
#define ID_FORM MKTAG('F','O','R','M')
|
|
#define ID_ANNO MKTAG('A','N','N','O')
|
|
#define ID_AUTH MKTAG('A','U','T','H')
|
|
#define ID_CHRS MKTAG('C','H','R','S')
|
|
#define ID_COPYRIGHT MKTAG('(','c',')',' ')
|
|
#define ID_CSET MKTAG('C','S','E','T')
|
|
#define ID_FVER MKTAG('F','V','E','R')
|
|
#define ID_NAME MKTAG('N','A','M','E')
|
|
#define ID_TEXT MKTAG('T','E','X','T')
|
|
#define ID_BODY MKTAG('B','O','D','Y')
|
|
#define ID_ANNO MKTAG('A','N','N','O')
|
|
|
|
#define LEFT 2
|
|
#define RIGHT 4
|
|
#define STEREO 6
|
|
|
|
typedef enum {
|
|
COMP_NONE,
|
|
COMP_FIB,
|
|
COMP_EXP
|
|
} svx8_compression_type;
|
|
|
|
typedef enum {
|
|
BITMAP_RAW,
|
|
BITMAP_BYTERUN1
|
|
} bitmap_compression_type;
|
|
|
|
typedef struct {
|
|
uint64_t body_pos;
|
|
uint32_t body_size;
|
|
uint32_t sent_bytes;
|
|
} IffDemuxContext;
|
|
|
|
|
|
/* Metadata string read */
|
|
static int get_metadata(AVFormatContext *s,
|
|
const char *const tag,
|
|
const unsigned data_size)
|
|
{
|
|
uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
|
|
|
|
if (!buf)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (avio_read(s->pb, buf, data_size) < 0) {
|
|
av_free(buf);
|
|
return AVERROR(EIO);
|
|
}
|
|
buf[data_size] = 0;
|
|
av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
|
|
return 0;
|
|
}
|
|
|
|
static int iff_probe(AVProbeData *p)
|
|
{
|
|
const uint8_t *d = p->buf;
|
|
|
|
if ( AV_RL32(d) == ID_FORM &&
|
|
(AV_RL32(d+8) == ID_8SVX || AV_RL32(d+8) == ID_PBM || AV_RL32(d+8) == ID_ILBM) )
|
|
return AVPROBE_SCORE_MAX;
|
|
return 0;
|
|
}
|
|
|
|
static int iff_read_header(AVFormatContext *s)
|
|
{
|
|
IffDemuxContext *iff = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st;
|
|
uint32_t chunk_id, data_size;
|
|
int compression = -1;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codec->channels = 1;
|
|
avio_skip(pb, 8);
|
|
// codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
|
|
st->codec->codec_tag = avio_rl32(pb);
|
|
|
|
while(!pb->eof_reached) {
|
|
uint64_t orig_pos;
|
|
int res;
|
|
const char *metadata_tag = NULL;
|
|
chunk_id = avio_rl32(pb);
|
|
data_size = avio_rb32(pb);
|
|
orig_pos = avio_tell(pb);
|
|
|
|
switch(chunk_id) {
|
|
case ID_VHDR:
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
|
|
if (data_size < 14)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, 12);
|
|
st->codec->sample_rate = avio_rb16(pb);
|
|
if (data_size >= 16) {
|
|
avio_skip(pb, 1);
|
|
compression = avio_r8(pb);
|
|
}
|
|
break;
|
|
|
|
case ID_BODY:
|
|
iff->body_pos = avio_tell(pb);
|
|
iff->body_size = data_size;
|
|
break;
|
|
|
|
case ID_CHAN:
|
|
if (data_size < 4)
|
|
return AVERROR_INVALIDDATA;
|
|
st->codec->channels = (avio_rb32(pb) < 6) ? 1 : 2;
|
|
break;
|
|
|
|
case ID_CMAP:
|
|
st->codec->extradata_size = data_size;
|
|
st->codec->extradata = av_malloc(data_size);
|
|
if (!st->codec->extradata)
|
|
return AVERROR(ENOMEM);
|
|
if (avio_read(pb, st->codec->extradata, data_size) < 0)
|
|
return AVERROR(EIO);
|
|
break;
|
|
|
|
case ID_BMHD:
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
if (data_size <= 8)
|
|
return AVERROR_INVALIDDATA;
|
|
st->codec->width = avio_rb16(pb);
|
|
st->codec->height = avio_rb16(pb);
|
|
avio_skip(pb, 4); // x, y offset
|
|
st->codec->bits_per_coded_sample = avio_r8(pb);
|
|
if (data_size >= 11) {
|
|
avio_skip(pb, 1); // masking
|
|
compression = avio_r8(pb);
|
|
}
|
|
if (data_size >= 16) {
|
|
avio_skip(pb, 3); // paddding, transparent
|
|
st->sample_aspect_ratio.num = avio_r8(pb);
|
|
st->sample_aspect_ratio.den = avio_r8(pb);
|
|
}
|
|
break;
|
|
|
|
case ID_ANNO:
|
|
case ID_TEXT:
|
|
metadata_tag = "comment";
|
|
break;
|
|
|
|
case ID_AUTH:
|
|
metadata_tag = "artist";
|
|
break;
|
|
|
|
case ID_COPYRIGHT:
|
|
metadata_tag = "copyright";
|
|
break;
|
|
|
|
case ID_NAME:
|
|
metadata_tag = "title";
|
|
break;
|
|
}
|
|
|
|
if (metadata_tag) {
|
|
if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
|
|
av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!", metadata_tag);
|
|
return res;
|
|
}
|
|
}
|
|
avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
|
|
}
|
|
|
|
avio_seek(pb, iff->body_pos, SEEK_SET);
|
|
|
|
switch(st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
|
|
|
|
switch(compression) {
|
|
case COMP_NONE:
|
|
st->codec->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
|
|
break;
|
|
case COMP_FIB:
|
|
st->codec->codec_id = AV_CODEC_ID_8SVX_FIB;
|
|
break;
|
|
case COMP_EXP:
|
|
st->codec->codec_id = AV_CODEC_ID_8SVX_EXP;
|
|
break;
|
|
default:
|
|
av_log(s, AV_LOG_ERROR, "unknown compression method\n");
|
|
return -1;
|
|
}
|
|
|
|
st->codec->bits_per_coded_sample = 8;
|
|
st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
|
|
st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
|
|
break;
|
|
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
switch (compression) {
|
|
case BITMAP_RAW:
|
|
st->codec->codec_id = AV_CODEC_ID_IFF_ILBM;
|
|
break;
|
|
case BITMAP_BYTERUN1:
|
|
st->codec->codec_id = AV_CODEC_ID_IFF_BYTERUN1;
|
|
break;
|
|
default:
|
|
av_log(s, AV_LOG_ERROR, "unknown compression method\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iff_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
IffDemuxContext *iff = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int ret;
|
|
|
|
if(iff->sent_bytes >= iff->body_size)
|
|
return AVERROR_EOF;
|
|
|
|
ret = av_get_packet(pb, pkt, iff->body_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if(iff->sent_bytes == 0)
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
iff->sent_bytes = iff->body_size;
|
|
|
|
pkt->stream_index = 0;
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_iff_demuxer = {
|
|
.name = "iff",
|
|
.long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
|
|
.priv_data_size = sizeof(IffDemuxContext),
|
|
.read_probe = iff_probe,
|
|
.read_header = iff_read_header,
|
|
.read_packet = iff_read_packet,
|
|
};
|