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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2008 Jaikrishnan Menon |
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| 3 | * Copyright (c) 2010 Peter Ross |
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| 4 | * Copyright (c) 2010 Sebastian Vater |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | /** |
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| 24 | * @file |
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| 25 | * IFF file demuxer |
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| 26 | * by Jaikrishnan Menon |
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| 27 | * for more information on the .iff file format, visit: |
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| 28 | * http://wiki.multimedia.cx/index.php?title=IFF |
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| 29 | */ |
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| 30 | |||
| 31 | #include "libavutil/avassert.h" |
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| 32 | #include "libavutil/channel_layout.h" |
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| 33 | #include "libavutil/intreadwrite.h" |
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| 34 | #include "libavutil/dict.h" |
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| 35 | #include "libavcodec/bytestream.h" |
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| 36 | #include "avformat.h" |
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| 37 | #include "internal.h" |
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| 38 | |||
| 39 | #define ID_8SVX MKTAG('8','S','V','X') |
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| 40 | #define ID_16SV MKTAG('1','6','S','V') |
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| 41 | #define ID_MAUD MKTAG('M','A','U','D') |
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| 42 | #define ID_MHDR MKTAG('M','H','D','R') |
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| 43 | #define ID_MDAT MKTAG('M','D','A','T') |
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| 44 | #define ID_VHDR MKTAG('V','H','D','R') |
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| 45 | #define ID_ATAK MKTAG('A','T','A','K') |
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| 46 | #define ID_RLSE MKTAG('R','L','S','E') |
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| 47 | #define ID_CHAN MKTAG('C','H','A','N') |
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| 48 | #define ID_PBM MKTAG('P','B','M',' ') |
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| 49 | #define ID_ILBM MKTAG('I','L','B','M') |
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| 50 | #define ID_BMHD MKTAG('B','M','H','D') |
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| 51 | #define ID_DGBL MKTAG('D','G','B','L') |
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| 52 | #define ID_CAMG MKTAG('C','A','M','G') |
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| 53 | #define ID_CMAP MKTAG('C','M','A','P') |
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| 54 | #define ID_ACBM MKTAG('A','C','B','M') |
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| 55 | #define ID_DEEP MKTAG('D','E','E','P') |
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| 56 | #define ID_RGB8 MKTAG('R','G','B','8') |
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| 57 | #define ID_RGBN MKTAG('R','G','B','N') |
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| 58 | |||
| 59 | #define ID_FORM MKTAG('F','O','R','M') |
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| 60 | #define ID_ANNO MKTAG('A','N','N','O') |
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| 61 | #define ID_AUTH MKTAG('A','U','T','H') |
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| 62 | #define ID_CHRS MKTAG('C','H','R','S') |
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| 63 | #define ID_COPYRIGHT MKTAG('(','c',')',' ') |
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| 64 | #define ID_CSET MKTAG('C','S','E','T') |
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| 65 | #define ID_FVER MKTAG('F','V','E','R') |
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| 66 | #define ID_NAME MKTAG('N','A','M','E') |
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| 67 | #define ID_TEXT MKTAG('T','E','X','T') |
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| 68 | #define ID_ABIT MKTAG('A','B','I','T') |
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| 69 | #define ID_BODY MKTAG('B','O','D','Y') |
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| 70 | #define ID_DBOD MKTAG('D','B','O','D') |
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| 71 | #define ID_DPEL MKTAG('D','P','E','L') |
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| 72 | #define ID_DLOC MKTAG('D','L','O','C') |
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| 73 | #define ID_TVDC MKTAG('T','V','D','C') |
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| 74 | |||
| 75 | #define LEFT 2 |
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| 76 | #define RIGHT 4 |
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| 77 | #define STEREO 6 |
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| 78 | |||
| 79 | /** |
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| 80 | * This number of bytes if added at the beginning of each AVPacket |
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| 81 | * which contain additional information about video properties |
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| 82 | * which has to be shared between demuxer and decoder. |
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| 83 | * This number may change between frames, e.g. the demuxer might |
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| 84 | * set it to smallest possible size of 2 to indicate that there's |
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| 85 | * no extradata changing in this frame. |
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| 86 | */ |
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| 87 | #define IFF_EXTRA_VIDEO_SIZE 41 |
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| 88 | |||
| 89 | typedef enum { |
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| 90 | COMP_NONE, |
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| 91 | COMP_FIB, |
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| 92 | COMP_EXP |
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| 93 | } svx8_compression_type; |
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| 94 | |||
| 95 | typedef struct { |
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| 96 | int64_t body_pos; |
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| 97 | int64_t body_end; |
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| 98 | uint32_t body_size; |
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| 99 | svx8_compression_type svx8_compression; |
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| 100 | unsigned maud_bits; |
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| 101 | unsigned maud_compression; |
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| 102 | unsigned bitmap_compression; ///< delta compression method used |
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| 103 | unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM) |
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| 104 | unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise) |
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| 105 | unsigned flags; ///< 1 for EHB, 0 is no extra half darkening |
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| 106 | unsigned transparency; ///< transparency color index in palette |
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| 107 | unsigned masking; ///< masking method used |
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| 108 | uint8_t tvdc[32]; ///< TVDC lookup table |
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| 109 | } IffDemuxContext; |
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| 110 | |||
| 111 | /* Metadata string read */ |
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| 112 | static int get_metadata(AVFormatContext *s, |
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| 113 | const char *const tag, |
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| 114 | const unsigned data_size) |
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| 115 | { |
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| 116 | uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1); |
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| 117 | |||
| 118 | if (!buf) |
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| 119 | return AVERROR(ENOMEM); |
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| 120 | |||
| 121 | if (avio_read(s->pb, buf, data_size) < 0) { |
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| 122 | av_free(buf); |
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| 123 | return AVERROR(EIO); |
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| 124 | } |
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| 125 | buf[data_size] = 0; |
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| 126 | av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL); |
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| 127 | return 0; |
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| 128 | } |
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| 129 | |||
| 130 | static int iff_probe(AVProbeData *p) |
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| 131 | { |
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| 132 | const uint8_t *d = p->buf; |
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| 133 | |||
| 134 | if ( AV_RL32(d) == ID_FORM && |
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| 135 | (AV_RL32(d+8) == ID_8SVX || |
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| 136 | AV_RL32(d+8) == ID_16SV || |
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| 137 | AV_RL32(d+8) == ID_MAUD || |
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| 138 | AV_RL32(d+8) == ID_PBM || |
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| 139 | AV_RL32(d+8) == ID_ACBM || |
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| 140 | AV_RL32(d+8) == ID_DEEP || |
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| 141 | AV_RL32(d+8) == ID_ILBM || |
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| 142 | AV_RL32(d+8) == ID_RGB8 || |
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| 143 | AV_RL32(d+8) == ID_RGBN) ) |
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| 144 | return AVPROBE_SCORE_MAX; |
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| 145 | return 0; |
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| 146 | } |
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| 147 | |||
| 148 | 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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| 149 | 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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| 150 | 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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| 151 | 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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| 152 | 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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| 153 | |||
| 154 | static int iff_read_header(AVFormatContext *s) |
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| 155 | { |
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| 156 | IffDemuxContext *iff = s->priv_data; |
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| 157 | AVIOContext *pb = s->pb; |
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| 158 | AVStream *st; |
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| 159 | uint8_t *buf; |
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| 160 | uint32_t chunk_id, data_size; |
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| 161 | uint32_t screenmode = 0, num, den; |
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| 162 | unsigned transparency = 0; |
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| 163 | unsigned masking = 0; // no mask |
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| 164 | uint8_t fmt[16]; |
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| 165 | int fmt_size; |
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| 166 | |||
| 167 | st = avformat_new_stream(s, NULL); |
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| 168 | if (!st) |
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| 169 | return AVERROR(ENOMEM); |
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| 170 | |||
| 171 | st->codec->channels = 1; |
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| 172 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
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| 173 | avio_skip(pb, 8); |
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| 174 | // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content |
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| 175 | st->codec->codec_tag = avio_rl32(pb); |
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| 176 | iff->bitmap_compression = -1; |
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| 177 | iff->svx8_compression = -1; |
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| 178 | iff->maud_bits = -1; |
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| 179 | iff->maud_compression = -1; |
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| 180 | |||
| 181 | while(!url_feof(pb)) { |
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| 182 | uint64_t orig_pos; |
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| 183 | int res; |
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| 184 | const char *metadata_tag = NULL; |
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| 185 | chunk_id = avio_rl32(pb); |
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| 186 | data_size = avio_rb32(pb); |
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| 187 | orig_pos = avio_tell(pb); |
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| 188 | |||
| 189 | switch(chunk_id) { |
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| 190 | case ID_VHDR: |
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| 191 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 192 | |||
| 193 | if (data_size < 14) |
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| 194 | return AVERROR_INVALIDDATA; |
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| 195 | avio_skip(pb, 12); |
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| 196 | st->codec->sample_rate = avio_rb16(pb); |
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| 197 | if (data_size >= 16) { |
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| 198 | avio_skip(pb, 1); |
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| 199 | iff->svx8_compression = avio_r8(pb); |
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| 200 | } |
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| 201 | break; |
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| 202 | |||
| 203 | case ID_MHDR: |
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| 204 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 205 | |||
| 206 | if (data_size < 32) |
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| 207 | return AVERROR_INVALIDDATA; |
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| 208 | avio_skip(pb, 4); |
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| 209 | iff->maud_bits = avio_rb16(pb); |
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| 210 | avio_skip(pb, 2); |
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| 211 | num = avio_rb32(pb); |
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| 212 | den = avio_rb16(pb); |
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| 213 | if (!den) |
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| 214 | return AVERROR_INVALIDDATA; |
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| 215 | avio_skip(pb, 2); |
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| 216 | st->codec->sample_rate = num / den; |
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| 217 | st->codec->channels = avio_rb16(pb); |
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| 218 | iff->maud_compression = avio_rb16(pb); |
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| 219 | if (st->codec->channels == 1) |
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| 220 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
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| 221 | else if (st->codec->channels == 2) |
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| 222 | st->codec->channel_layout = AV_CH_LAYOUT_STEREO; |
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| 223 | break; |
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| 224 | |||
| 225 | case ID_ABIT: |
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| 226 | case ID_BODY: |
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| 227 | case ID_DBOD: |
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| 228 | case ID_MDAT: |
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| 229 | iff->body_pos = avio_tell(pb); |
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| 230 | iff->body_end = iff->body_pos + data_size; |
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| 231 | iff->body_size = data_size; |
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| 232 | break; |
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| 233 | |||
| 234 | case ID_CHAN: |
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| 235 | if (data_size < 4) |
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| 236 | return AVERROR_INVALIDDATA; |
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| 237 | if (avio_rb32(pb) < 6) { |
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| 238 | st->codec->channels = 1; |
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| 239 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
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| 240 | } else { |
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| 241 | st->codec->channels = 2; |
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| 242 | st->codec->channel_layout = AV_CH_LAYOUT_STEREO; |
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| 243 | } |
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| 244 | break; |
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| 245 | |||
| 246 | case ID_CAMG: |
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| 247 | if (data_size < 4) |
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| 248 | return AVERROR_INVALIDDATA; |
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| 249 | screenmode = avio_rb32(pb); |
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| 250 | break; |
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| 251 | |||
| 252 | case ID_CMAP: |
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| 253 | if (data_size < 3 || data_size > 768 || data_size % 3) { |
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| 254 | av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %d\n", |
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| 255 | data_size); |
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| 256 | return AVERROR_INVALIDDATA; |
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| 257 | } |
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| 258 | st->codec->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE; |
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| 259 | st->codec->extradata = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE); |
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| 260 | if (!st->codec->extradata) |
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| 261 | return AVERROR(ENOMEM); |
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| 262 | if (avio_read(pb, st->codec->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0) |
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| 263 | return AVERROR(EIO); |
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| 264 | break; |
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| 265 | |||
| 266 | case ID_BMHD: |
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| 267 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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| 268 | if (data_size <= 8) |
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| 269 | return AVERROR_INVALIDDATA; |
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| 270 | st->codec->width = avio_rb16(pb); |
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| 271 | st->codec->height = avio_rb16(pb); |
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| 272 | avio_skip(pb, 4); // x, y offset |
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| 273 | st->codec->bits_per_coded_sample = avio_r8(pb); |
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| 274 | if (data_size >= 10) |
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| 275 | masking = avio_r8(pb); |
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| 276 | if (data_size >= 11) |
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| 277 | iff->bitmap_compression = avio_r8(pb); |
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| 278 | if (data_size >= 14) { |
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| 279 | avio_skip(pb, 1); // padding |
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| 280 | transparency = avio_rb16(pb); |
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| 281 | } |
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| 282 | if (data_size >= 16) { |
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| 283 | st->sample_aspect_ratio.num = avio_r8(pb); |
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| 284 | st->sample_aspect_ratio.den = avio_r8(pb); |
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| 285 | } |
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| 286 | break; |
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| 287 | |||
| 288 | case ID_DPEL: |
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| 289 | if (data_size < 4 || (data_size & 3)) |
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| 290 | return AVERROR_INVALIDDATA; |
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| 291 | if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0) |
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| 292 | return fmt_size; |
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| 293 | if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24))) |
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| 294 | st->codec->pix_fmt = AV_PIX_FMT_RGB24; |
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| 295 | else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba))) |
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| 296 | st->codec->pix_fmt = AV_PIX_FMT_RGBA; |
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| 297 | else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra))) |
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| 298 | st->codec->pix_fmt = AV_PIX_FMT_BGRA; |
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| 299 | else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb))) |
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| 300 | st->codec->pix_fmt = AV_PIX_FMT_ARGB; |
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| 301 | else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr))) |
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| 302 | st->codec->pix_fmt = AV_PIX_FMT_ABGR; |
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| 303 | else { |
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| 304 | avpriv_request_sample(s, "color format %.16s", fmt); |
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| 305 | return AVERROR_PATCHWELCOME; |
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| 306 | } |
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| 307 | break; |
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| 308 | |||
| 309 | case ID_DGBL: |
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| 310 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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| 311 | if (data_size < 8) |
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| 312 | return AVERROR_INVALIDDATA; |
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| 313 | st->codec->width = avio_rb16(pb); |
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| 314 | st->codec->height = avio_rb16(pb); |
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| 315 | iff->bitmap_compression = avio_rb16(pb); |
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| 316 | st->sample_aspect_ratio.num = avio_r8(pb); |
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| 317 | st->sample_aspect_ratio.den = avio_r8(pb); |
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| 318 | st->codec->bits_per_coded_sample = 24; |
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| 319 | break; |
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| 320 | |||
| 321 | case ID_DLOC: |
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| 322 | if (data_size < 4) |
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| 323 | return AVERROR_INVALIDDATA; |
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| 324 | st->codec->width = avio_rb16(pb); |
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| 325 | st->codec->height = avio_rb16(pb); |
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| 326 | break; |
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| 327 | |||
| 328 | case ID_TVDC: |
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| 329 | if (data_size < sizeof(iff->tvdc)) |
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| 330 | return AVERROR_INVALIDDATA; |
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| 331 | res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc)); |
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| 332 | if (res < 0) |
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| 333 | return res; |
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| 334 | break; |
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| 335 | |||
| 336 | case ID_ANNO: |
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| 337 | case ID_TEXT: metadata_tag = "comment"; break; |
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| 338 | case ID_AUTH: metadata_tag = "artist"; break; |
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| 339 | case ID_COPYRIGHT: metadata_tag = "copyright"; break; |
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| 340 | case ID_NAME: metadata_tag = "title"; break; |
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| 341 | } |
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| 342 | |||
| 343 | if (metadata_tag) { |
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| 344 | if ((res = get_metadata(s, metadata_tag, data_size)) < 0) { |
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| 345 | av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag); |
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| 346 | return res; |
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| 347 | } |
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| 348 | } |
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| 349 | avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1)); |
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| 350 | } |
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| 351 | |||
| 352 | avio_seek(pb, iff->body_pos, SEEK_SET); |
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| 353 | |||
| 354 | switch(st->codec->codec_type) { |
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| 355 | case AVMEDIA_TYPE_AUDIO: |
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| 356 | avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate); |
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| 357 | |||
| 358 | if (st->codec->codec_tag == ID_16SV) |
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| 359 | st->codec->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR; |
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| 360 | else if (st->codec->codec_tag == ID_MAUD) { |
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| 361 | if (iff->maud_bits == 8 && !iff->maud_compression) { |
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| 362 | st->codec->codec_id = AV_CODEC_ID_PCM_U8; |
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| 363 | } else if (iff->maud_bits == 16 && !iff->maud_compression) { |
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| 364 | st->codec->codec_id = AV_CODEC_ID_PCM_S16BE; |
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| 365 | } else if (iff->maud_bits == 8 && iff->maud_compression == 2) { |
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| 366 | st->codec->codec_id = AV_CODEC_ID_PCM_ALAW; |
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| 367 | } else if (iff->maud_bits == 8 && iff->maud_compression == 3) { |
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| 368 | st->codec->codec_id = AV_CODEC_ID_PCM_MULAW; |
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| 369 | } else { |
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| 370 | avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits); |
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| 371 | return AVERROR_PATCHWELCOME; |
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| 372 | } |
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| 373 | |||
| 374 | st->codec->bits_per_coded_sample = |
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| 375 | av_get_bits_per_sample(st->codec->codec_id); |
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| 376 | |||
| 377 | st->codec->block_align = |
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| 378 | st->codec->bits_per_coded_sample * st->codec->channels / 8; |
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| 379 | } else { |
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| 380 | switch (iff->svx8_compression) { |
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| 381 | case COMP_NONE: |
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| 382 | st->codec->codec_id = AV_CODEC_ID_PCM_S8_PLANAR; |
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| 383 | break; |
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| 384 | case COMP_FIB: |
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| 385 | st->codec->codec_id = AV_CODEC_ID_8SVX_FIB; |
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| 386 | break; |
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| 387 | case COMP_EXP: |
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| 388 | st->codec->codec_id = AV_CODEC_ID_8SVX_EXP; |
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| 389 | break; |
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| 390 | default: |
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| 391 | av_log(s, AV_LOG_ERROR, |
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| 392 | "Unknown SVX8 compression method '%d'\n", iff->svx8_compression); |
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| 393 | return -1; |
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| 394 | } |
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| 395 | } |
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| 396 | |||
| 397 | st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id); |
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| 398 | st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample; |
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| 399 | st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample; |
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| 400 | break; |
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| 401 | |||
| 402 | case AVMEDIA_TYPE_VIDEO: |
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| 403 | iff->bpp = st->codec->bits_per_coded_sample; |
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| 404 | if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) { |
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| 405 | iff->ham = iff->bpp > 6 ? 6 : 4; |
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| 406 | st->codec->bits_per_coded_sample = 24; |
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| 407 | } |
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| 408 | iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8; |
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| 409 | iff->masking = masking; |
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| 410 | iff->transparency = transparency; |
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| 411 | |||
| 412 | if (!st->codec->extradata) { |
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| 413 | st->codec->extradata_size = IFF_EXTRA_VIDEO_SIZE; |
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| 414 | st->codec->extradata = av_malloc(IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE); |
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| 415 | if (!st->codec->extradata) |
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| 416 | return AVERROR(ENOMEM); |
||
| 417 | } |
||
| 418 | av_assert0(st->codec->extradata_size >= IFF_EXTRA_VIDEO_SIZE); |
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| 419 | buf = st->codec->extradata; |
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| 420 | bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE); |
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| 421 | bytestream_put_byte(&buf, iff->bitmap_compression); |
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| 422 | bytestream_put_byte(&buf, iff->bpp); |
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| 423 | bytestream_put_byte(&buf, iff->ham); |
||
| 424 | bytestream_put_byte(&buf, iff->flags); |
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| 425 | bytestream_put_be16(&buf, iff->transparency); |
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| 426 | bytestream_put_byte(&buf, iff->masking); |
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| 427 | bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc)); |
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| 428 | st->codec->codec_id = AV_CODEC_ID_IFF_ILBM; |
||
| 429 | break; |
||
| 430 | default: |
||
| 431 | return -1; |
||
| 432 | } |
||
| 433 | |||
| 434 | return 0; |
||
| 435 | } |
||
| 436 | |||
| 437 | static int iff_read_packet(AVFormatContext *s, |
||
| 438 | AVPacket *pkt) |
||
| 439 | { |
||
| 440 | IffDemuxContext *iff = s->priv_data; |
||
| 441 | AVIOContext *pb = s->pb; |
||
| 442 | AVStream *st = s->streams[0]; |
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| 443 | int ret; |
||
| 444 | int64_t pos = avio_tell(pb); |
||
| 445 | |||
| 446 | if (pos >= iff->body_end) |
||
| 447 | return AVERROR_EOF; |
||
| 448 | |||
| 449 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
||
| 450 | if (st->codec->codec_tag == ID_MAUD) { |
||
| 451 | ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codec->block_align)); |
||
| 452 | } else { |
||
| 453 | ret = av_get_packet(pb, pkt, iff->body_size); |
||
| 454 | } |
||
| 455 | } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
||
| 456 | uint8_t *buf; |
||
| 457 | |||
| 458 | if (av_new_packet(pkt, iff->body_size + 2) < 0) { |
||
| 459 | return AVERROR(ENOMEM); |
||
| 460 | } |
||
| 461 | |||
| 462 | buf = pkt->data; |
||
| 463 | bytestream_put_be16(&buf, 2); |
||
| 464 | ret = avio_read(pb, buf, iff->body_size); |
||
| 465 | } else { |
||
| 466 | av_assert0(0); |
||
| 467 | } |
||
| 468 | |||
| 469 | if (pos == iff->body_pos) |
||
| 470 | pkt->flags |= AV_PKT_FLAG_KEY; |
||
| 471 | if (ret < 0) |
||
| 472 | return ret; |
||
| 473 | pkt->stream_index = 0; |
||
| 474 | return ret; |
||
| 475 | } |
||
| 476 | |||
| 477 | AVInputFormat ff_iff_demuxer = { |
||
| 478 | .name = "iff", |
||
| 479 | .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"), |
||
| 480 | .priv_data_size = sizeof(IffDemuxContext), |
||
| 481 | .read_probe = iff_probe, |
||
| 482 | .read_header = iff_read_header, |
||
| 483 | .read_packet = iff_read_packet, |
||
| 484 | .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK, |
||
| 485 | }; |