forked from KolibriOS/kolibrios
486 lines
18 KiB
C
486 lines
18 KiB
C
/*
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* Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net>
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* Copyright (c) 2010 Peter Ross <pross@xvid.org>
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* Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.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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/**
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* @file
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* IFF file demuxer
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* by Jaikrishnan Menon
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* for more information on the .iff file format, visit:
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* http://wiki.multimedia.cx/index.php?title=IFF
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/dict.h"
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#include "libavcodec/bytestream.h"
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#include "avformat.h"
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#include "internal.h"
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#define ID_8SVX MKTAG('8','S','V','X')
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#define ID_16SV MKTAG('1','6','S','V')
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#define ID_MAUD MKTAG('M','A','U','D')
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#define ID_MHDR MKTAG('M','H','D','R')
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#define ID_MDAT MKTAG('M','D','A','T')
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#define ID_VHDR MKTAG('V','H','D','R')
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#define ID_ATAK MKTAG('A','T','A','K')
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#define ID_RLSE MKTAG('R','L','S','E')
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#define ID_CHAN MKTAG('C','H','A','N')
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#define ID_PBM MKTAG('P','B','M',' ')
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#define ID_ILBM MKTAG('I','L','B','M')
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#define ID_BMHD MKTAG('B','M','H','D')
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#define ID_DGBL MKTAG('D','G','B','L')
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#define ID_CAMG MKTAG('C','A','M','G')
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#define ID_CMAP MKTAG('C','M','A','P')
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#define ID_ACBM MKTAG('A','C','B','M')
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#define ID_DEEP MKTAG('D','E','E','P')
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#define ID_RGB8 MKTAG('R','G','B','8')
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#define ID_RGBN MKTAG('R','G','B','N')
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#define ID_FORM MKTAG('F','O','R','M')
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#define ID_ANNO MKTAG('A','N','N','O')
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#define ID_AUTH MKTAG('A','U','T','H')
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#define ID_CHRS MKTAG('C','H','R','S')
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#define ID_COPYRIGHT MKTAG('(','c',')',' ')
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#define ID_CSET MKTAG('C','S','E','T')
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#define ID_FVER MKTAG('F','V','E','R')
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#define ID_NAME MKTAG('N','A','M','E')
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#define ID_TEXT MKTAG('T','E','X','T')
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#define ID_ABIT MKTAG('A','B','I','T')
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#define ID_BODY MKTAG('B','O','D','Y')
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#define ID_DBOD MKTAG('D','B','O','D')
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#define ID_DPEL MKTAG('D','P','E','L')
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#define ID_DLOC MKTAG('D','L','O','C')
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#define ID_TVDC MKTAG('T','V','D','C')
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#define LEFT 2
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#define RIGHT 4
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#define STEREO 6
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/**
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* This number of bytes if added at the beginning of each AVPacket
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* which contain additional information about video properties
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* which has to be shared between demuxer and decoder.
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* This number may change between frames, e.g. the demuxer might
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* set it to smallest possible size of 2 to indicate that there's
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* no extradata changing in this frame.
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*/
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#define IFF_EXTRA_VIDEO_SIZE 41
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typedef enum {
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COMP_NONE,
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COMP_FIB,
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COMP_EXP
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} svx8_compression_type;
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typedef struct {
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int64_t body_pos;
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int64_t body_end;
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uint32_t body_size;
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svx8_compression_type svx8_compression;
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unsigned maud_bits;
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unsigned maud_compression;
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unsigned bitmap_compression; ///< delta compression method used
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unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
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unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
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unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
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unsigned transparency; ///< transparency color index in palette
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unsigned masking; ///< masking method used
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uint8_t tvdc[32]; ///< TVDC lookup table
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} IffDemuxContext;
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/* Metadata string read */
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static int get_metadata(AVFormatContext *s,
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const char *const tag,
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const unsigned data_size)
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{
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uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
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if (!buf)
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return AVERROR(ENOMEM);
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if (avio_read(s->pb, buf, data_size) < 0) {
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av_free(buf);
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return AVERROR(EIO);
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}
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buf[data_size] = 0;
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av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
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return 0;
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}
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static int iff_probe(AVProbeData *p)
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{
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const uint8_t *d = p->buf;
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if ( AV_RL32(d) == ID_FORM &&
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(AV_RL32(d+8) == ID_8SVX ||
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AV_RL32(d+8) == ID_16SV ||
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AV_RL32(d+8) == ID_MAUD ||
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AV_RL32(d+8) == ID_PBM ||
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AV_RL32(d+8) == ID_ACBM ||
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AV_RL32(d+8) == ID_DEEP ||
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AV_RL32(d+8) == ID_ILBM ||
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AV_RL32(d+8) == ID_RGB8 ||
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AV_RL32(d+8) == ID_RGBN) )
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
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static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
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static const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
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static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
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static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
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static int iff_read_header(AVFormatContext *s)
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{
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IffDemuxContext *iff = s->priv_data;
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AVIOContext *pb = s->pb;
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AVStream *st;
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uint8_t *buf;
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uint32_t chunk_id, data_size;
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uint32_t screenmode = 0, num, den;
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unsigned transparency = 0;
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unsigned masking = 0; // no mask
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uint8_t fmt[16];
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int fmt_size;
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->channels = 1;
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st->codec->channel_layout = AV_CH_LAYOUT_MONO;
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avio_skip(pb, 8);
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// codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
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st->codec->codec_tag = avio_rl32(pb);
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iff->bitmap_compression = -1;
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iff->svx8_compression = -1;
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iff->maud_bits = -1;
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iff->maud_compression = -1;
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while(!url_feof(pb)) {
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uint64_t orig_pos;
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int res;
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const char *metadata_tag = NULL;
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chunk_id = avio_rl32(pb);
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data_size = avio_rb32(pb);
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orig_pos = avio_tell(pb);
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switch(chunk_id) {
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case ID_VHDR:
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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if (data_size < 14)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 12);
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st->codec->sample_rate = avio_rb16(pb);
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if (data_size >= 16) {
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avio_skip(pb, 1);
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iff->svx8_compression = avio_r8(pb);
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}
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break;
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case ID_MHDR:
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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if (data_size < 32)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 4);
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iff->maud_bits = avio_rb16(pb);
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avio_skip(pb, 2);
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num = avio_rb32(pb);
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den = avio_rb16(pb);
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if (!den)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 2);
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st->codec->sample_rate = num / den;
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st->codec->channels = avio_rb16(pb);
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iff->maud_compression = avio_rb16(pb);
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if (st->codec->channels == 1)
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st->codec->channel_layout = AV_CH_LAYOUT_MONO;
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else if (st->codec->channels == 2)
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st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
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break;
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case ID_ABIT:
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case ID_BODY:
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case ID_DBOD:
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case ID_MDAT:
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iff->body_pos = avio_tell(pb);
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iff->body_end = iff->body_pos + data_size;
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iff->body_size = data_size;
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break;
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case ID_CHAN:
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if (data_size < 4)
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return AVERROR_INVALIDDATA;
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if (avio_rb32(pb) < 6) {
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st->codec->channels = 1;
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st->codec->channel_layout = AV_CH_LAYOUT_MONO;
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} else {
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st->codec->channels = 2;
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st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
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}
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break;
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case ID_CAMG:
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if (data_size < 4)
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return AVERROR_INVALIDDATA;
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screenmode = avio_rb32(pb);
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break;
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case ID_CMAP:
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if (data_size < 3 || data_size > 768 || data_size % 3) {
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av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %d\n",
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data_size);
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return AVERROR_INVALIDDATA;
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}
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st->codec->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE;
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st->codec->extradata = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!st->codec->extradata)
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return AVERROR(ENOMEM);
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if (avio_read(pb, st->codec->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0)
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return AVERROR(EIO);
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break;
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case ID_BMHD:
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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if (data_size <= 8)
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return AVERROR_INVALIDDATA;
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st->codec->width = avio_rb16(pb);
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st->codec->height = avio_rb16(pb);
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avio_skip(pb, 4); // x, y offset
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st->codec->bits_per_coded_sample = avio_r8(pb);
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if (data_size >= 10)
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masking = avio_r8(pb);
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if (data_size >= 11)
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iff->bitmap_compression = avio_r8(pb);
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if (data_size >= 14) {
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avio_skip(pb, 1); // padding
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transparency = avio_rb16(pb);
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}
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if (data_size >= 16) {
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st->sample_aspect_ratio.num = avio_r8(pb);
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st->sample_aspect_ratio.den = avio_r8(pb);
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}
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break;
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case ID_DPEL:
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if (data_size < 4 || (data_size & 3))
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return AVERROR_INVALIDDATA;
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if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
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return fmt_size;
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if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
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st->codec->pix_fmt = AV_PIX_FMT_RGB24;
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else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
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st->codec->pix_fmt = AV_PIX_FMT_RGBA;
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else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
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st->codec->pix_fmt = AV_PIX_FMT_BGRA;
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else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
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st->codec->pix_fmt = AV_PIX_FMT_ARGB;
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else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
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st->codec->pix_fmt = AV_PIX_FMT_ABGR;
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else {
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avpriv_request_sample(s, "color format %.16s", fmt);
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return AVERROR_PATCHWELCOME;
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}
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break;
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case ID_DGBL:
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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if (data_size < 8)
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return AVERROR_INVALIDDATA;
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st->codec->width = avio_rb16(pb);
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st->codec->height = avio_rb16(pb);
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iff->bitmap_compression = avio_rb16(pb);
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st->sample_aspect_ratio.num = avio_r8(pb);
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st->sample_aspect_ratio.den = avio_r8(pb);
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st->codec->bits_per_coded_sample = 24;
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break;
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case ID_DLOC:
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if (data_size < 4)
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return AVERROR_INVALIDDATA;
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st->codec->width = avio_rb16(pb);
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st->codec->height = avio_rb16(pb);
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break;
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case ID_TVDC:
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if (data_size < sizeof(iff->tvdc))
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return AVERROR_INVALIDDATA;
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res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
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if (res < 0)
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return res;
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break;
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case ID_ANNO:
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case ID_TEXT: metadata_tag = "comment"; break;
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case ID_AUTH: metadata_tag = "artist"; break;
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case ID_COPYRIGHT: metadata_tag = "copyright"; break;
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case ID_NAME: metadata_tag = "title"; break;
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}
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if (metadata_tag) {
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if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
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av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
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return res;
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}
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}
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avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
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}
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avio_seek(pb, iff->body_pos, SEEK_SET);
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switch(st->codec->codec_type) {
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case AVMEDIA_TYPE_AUDIO:
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avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
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if (st->codec->codec_tag == ID_16SV)
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st->codec->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
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else if (st->codec->codec_tag == ID_MAUD) {
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if (iff->maud_bits == 8 && !iff->maud_compression) {
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st->codec->codec_id = AV_CODEC_ID_PCM_U8;
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} else if (iff->maud_bits == 16 && !iff->maud_compression) {
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st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
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} else if (iff->maud_bits == 8 && iff->maud_compression == 2) {
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st->codec->codec_id = AV_CODEC_ID_PCM_ALAW;
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} else if (iff->maud_bits == 8 && iff->maud_compression == 3) {
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st->codec->codec_id = AV_CODEC_ID_PCM_MULAW;
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} else {
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avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
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return AVERROR_PATCHWELCOME;
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}
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st->codec->bits_per_coded_sample =
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av_get_bits_per_sample(st->codec->codec_id);
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st->codec->block_align =
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st->codec->bits_per_coded_sample * st->codec->channels / 8;
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} else {
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switch (iff->svx8_compression) {
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case COMP_NONE:
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st->codec->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
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break;
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case COMP_FIB:
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st->codec->codec_id = AV_CODEC_ID_8SVX_FIB;
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break;
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case COMP_EXP:
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st->codec->codec_id = AV_CODEC_ID_8SVX_EXP;
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break;
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default:
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av_log(s, AV_LOG_ERROR,
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"Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
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return -1;
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}
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}
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st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
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st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
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st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
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break;
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case AVMEDIA_TYPE_VIDEO:
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iff->bpp = st->codec->bits_per_coded_sample;
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if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
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iff->ham = iff->bpp > 6 ? 6 : 4;
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st->codec->bits_per_coded_sample = 24;
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}
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iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
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iff->masking = masking;
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iff->transparency = transparency;
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if (!st->codec->extradata) {
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st->codec->extradata_size = IFF_EXTRA_VIDEO_SIZE;
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st->codec->extradata = av_malloc(IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!st->codec->extradata)
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return AVERROR(ENOMEM);
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}
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av_assert0(st->codec->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
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buf = st->codec->extradata;
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bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
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bytestream_put_byte(&buf, iff->bitmap_compression);
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bytestream_put_byte(&buf, iff->bpp);
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bytestream_put_byte(&buf, iff->ham);
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bytestream_put_byte(&buf, iff->flags);
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bytestream_put_be16(&buf, iff->transparency);
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bytestream_put_byte(&buf, iff->masking);
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bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
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st->codec->codec_id = AV_CODEC_ID_IFF_ILBM;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iff_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
IffDemuxContext *iff = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = s->streams[0];
|
|
int ret;
|
|
int64_t pos = avio_tell(pb);
|
|
|
|
if (pos >= iff->body_end)
|
|
return AVERROR_EOF;
|
|
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
if (st->codec->codec_tag == ID_MAUD) {
|
|
ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codec->block_align));
|
|
} else {
|
|
ret = av_get_packet(pb, pkt, iff->body_size);
|
|
}
|
|
} else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
uint8_t *buf;
|
|
|
|
if (av_new_packet(pkt, iff->body_size + 2) < 0) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
buf = pkt->data;
|
|
bytestream_put_be16(&buf, 2);
|
|
ret = avio_read(pb, buf, iff->body_size);
|
|
} else {
|
|
av_assert0(0);
|
|
}
|
|
|
|
if (pos == iff->body_pos)
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
if (ret < 0)
|
|
return ret;
|
|
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,
|
|
.flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
|
|
};
|