| 1 | /*
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| 2 | * Wing Commander III Movie (.mve) File Demuxer
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| 3 | * Copyright (c) 2003 The ffmpeg Project
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| 4 | *
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| 5 | * This library is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the GNU Lesser General Public
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| 7 | * License as published by the Free Software Foundation; either
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| 8 | * version 2 of the License, or (at your option) any later version.
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| 9 | *
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| 10 | * This library is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 13 | * Lesser General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU Lesser General Public
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| 16 | * License along with this library; if not, write to the Free Software
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| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 18 | */
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| 19 |
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| 20 | /**
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| 21 | * @file wc3movie.c
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| 22 | * Wing Commander III Movie file demuxer
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| 23 | * by Mike Melanson ([email protected])
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| 24 | * for more information on the WC3 .mve file format, visit:
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| 25 | * http://www.pcisys.net/~melanson/codecs/
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| 26 | */
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| 27 |
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| 28 | #include "avformat.h"
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| 29 |
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| 30 | #define WC3_PREAMBLE_SIZE 8
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| 31 |
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| 32 | #define FORM_TAG MKTAG('F', 'O', 'R', 'M')
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| 33 | #define MOVE_TAG MKTAG('M', 'O', 'V', 'E')
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| 34 | #define _PC__TAG MKTAG('_', 'P', 'C', '_')
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| 35 | #define SOND_TAG MKTAG('S', 'O', 'N', 'D')
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| 36 | #define BNAM_TAG MKTAG('B', 'N', 'A', 'M')
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| 37 | #define SIZE_TAG MKTAG('S', 'I', 'Z', 'E')
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| 38 | #define PALT_TAG MKTAG('P', 'A', 'L', 'T')
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| 39 | #define INDX_TAG MKTAG('I', 'N', 'D', 'X')
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| 40 | #define BRCH_TAG MKTAG('B', 'R', 'C', 'H')
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| 41 | #define SHOT_TAG MKTAG('S', 'H', 'O', 'T')
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| 42 | #define VGA__TAG MKTAG('V', 'G', 'A', ' ')
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| 43 | #define TEXT_TAG MKTAG('T', 'E', 'X', 'T')
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| 44 | #define AUDI_TAG MKTAG('A', 'U', 'D', 'I')
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| 45 |
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| 46 | /* video resolution unless otherwise specified */
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| 47 | #define WC3_DEFAULT_WIDTH 320
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| 48 | #define WC3_DEFAULT_HEIGHT 165
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| 49 |
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| 50 | /* always use the same PCM audio parameters */
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| 51 | #define WC3_SAMPLE_RATE 22050
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| 52 | #define WC3_AUDIO_CHANNELS 1
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| 53 | #define WC3_AUDIO_BITS 16
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| 54 |
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| 55 | /* nice, constant framerate */
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| 56 | #define WC3_FRAME_PTS_INC (90000 / 15)
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| 57 |
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| 58 | #define PALETTE_SIZE (256 * 3)
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| 59 | #define PALETTE_COUNT 256
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| 60 |
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| 61 | typedef struct Wc3DemuxContext {
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| 62 | int width;
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| 63 | int height;
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| 64 | unsigned char *palettes;
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| 65 | int palette_count;
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| 66 | int64_t pts;
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| 67 | int video_stream_index;
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| 68 | int audio_stream_index;
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| 69 |
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| 70 | AVPaletteControl palette_control;
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| 71 |
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| 72 | } Wc3DemuxContext;
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| 73 |
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| 74 | /* bizarre palette lookup table */
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| 75 | static const unsigned char wc3_pal_lookup[] = {
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| 76 | 0x00, 0x03, 0x05, 0x07, 0x09, 0x0B, 0x0D, 0x0E,
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| 77 | 0x10, 0x12, 0x13, 0x15, 0x16, 0x18, 0x19, 0x1A,
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| 78 | 0x1C, 0x1D, 0x1F, 0x20, 0x21, 0x23, 0x24, 0x25,
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| 79 | 0x27, 0x28, 0x29, 0x2A, 0x2C, 0x2D, 0x2E, 0x2F,
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| 80 | 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x38, 0x39,
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| 81 | 0x3A, 0x3B, 0x3C, 0x3D, 0x3F, 0x40, 0x41, 0x42,
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| 82 | 0x43, 0x44, 0x45, 0x46, 0x48, 0x49, 0x4A, 0x4B,
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| 83 | 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53,
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| 84 | 0x54, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C,
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| 85 | 0x5D, 0x5E, 0x5F, 0x60, 0x61, 0x62, 0x63, 0x64,
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| 86 | 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C,
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| 87 | 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74,
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| 88 | 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C,
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| 89 | 0x7D, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83,
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| 90 | 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B,
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| 91 | 0x8C, 0x8D, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92,
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| 92 | 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x99,
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| 93 | 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1,
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| 94 | 0xA2, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
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| 95 | 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
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| 96 | 0xB0, 0xB1, 0xB2, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6,
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| 97 | 0xB7, 0xB8, 0xB9, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD,
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| 98 | 0xBE, 0xBF, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4,
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| 99 | 0xC5, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB,
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| 100 | 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD0, 0xD1,
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| 101 | 0xD2, 0xD3, 0xD4, 0xD5, 0xD5, 0xD6, 0xD7, 0xD8,
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| 102 | 0xD9, 0xDA, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
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| 103 | 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE4, 0xE5,
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| 104 | 0xE6, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEB, 0xEC,
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| 105 | 0xED, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF1, 0xF2,
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| 106 | 0xF3, 0xF4, 0xF5, 0xF6, 0xF6, 0xF7, 0xF8, 0xF9,
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| 107 | 0xFA, 0xFA, 0xFB, 0xFC, 0xFD, 0xFD, 0xFD, 0xFD
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| 108 | };
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| 109 |
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| 110 |
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| 111 | static int wc3_probe(AVProbeData *p)
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| 112 | {
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| 113 | if (p->buf_size < 12)
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| 114 | return 0;
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| 115 |
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| 116 | if ((LE_32(&p->buf[0]) != FORM_TAG) ||
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| 117 | (LE_32(&p->buf[8]) != MOVE_TAG))
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| 118 | return 0;
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| 119 |
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| 120 | return AVPROBE_SCORE_MAX;
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| 121 | }
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| 122 |
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| 123 | static int wc3_read_header(AVFormatContext *s,
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| 124 | AVFormatParameters *ap)
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| 125 | {
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| 126 | Wc3DemuxContext *wc3 = (Wc3DemuxContext *)s->priv_data;
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| 127 | ByteIOContext *pb = &s->pb;
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| 128 | unsigned int fourcc_tag;
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| 129 | unsigned int size;
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| 130 | AVStream *st;
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| 131 | unsigned char preamble[WC3_PREAMBLE_SIZE];
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| 132 | int ret = 0;
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| 133 | int current_palette = 0;
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| 134 | int bytes_to_read;
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| 135 | int i;
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| 136 | unsigned char rotate;
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| 137 |
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| 138 | /* default context members */
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| 139 | wc3->width = WC3_DEFAULT_WIDTH;
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| 140 | wc3->height = WC3_DEFAULT_HEIGHT;
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| 141 | wc3->palettes = NULL;
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| 142 | wc3->palette_count = 0;
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| 143 | wc3->pts = 0;
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| 144 | wc3->video_stream_index = wc3->audio_stream_index = 0;
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| 145 |
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| 146 | /* skip the first 3 32-bit numbers */
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| 147 | url_fseek(pb, 12, SEEK_CUR);
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| 148 |
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| 149 | /* traverse through the chunks and load the header information before
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| 150 | * the first BRCH tag */
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| 151 | if ((ret = get_buffer(pb, preamble, WC3_PREAMBLE_SIZE)) !=
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| 152 | WC3_PREAMBLE_SIZE)
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| 153 | return AVERROR_IO;
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| 154 | fourcc_tag = LE_32(&preamble[0]);
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| 155 | size = (BE_32(&preamble[4]) + 1) & (~1);
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| 156 |
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| 157 | do {
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| 158 | switch (fourcc_tag) {
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| 159 |
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| 160 | case SOND_TAG:
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| 161 | case INDX_TAG:
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| 162 | /* SOND unknown, INDX unnecessary; ignore both */
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| 163 | url_fseek(pb, size, SEEK_CUR);
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| 164 | break;
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| 165 |
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| 166 | case _PC__TAG:
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| 167 | /* need the number of palettes */
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| 168 | url_fseek(pb, 8, SEEK_CUR);
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| 169 | if ((ret = get_buffer(pb, preamble, 4)) != 4)
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| 170 | return AVERROR_IO;
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| 171 | wc3->palette_count = LE_32(&preamble[0]);
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| 172 | if((unsigned)wc3->palette_count >= UINT_MAX / PALETTE_SIZE){
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| 173 | wc3->palette_count= 0;
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| 174 | return -1;
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| 175 | }
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| 176 | wc3->palettes = av_malloc(wc3->palette_count * PALETTE_SIZE);
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| 177 | break;
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| 178 |
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| 179 | case BNAM_TAG:
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| 180 | /* load up the name */
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| 181 | if ((unsigned)size < 512)
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| 182 | bytes_to_read = size;
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| 183 | else
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| 184 | bytes_to_read = 512;
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| 185 | if ((ret = get_buffer(pb, s->title, bytes_to_read)) != bytes_to_read)
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| 186 | return AVERROR_IO;
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| 187 | break;
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| 188 |
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| 189 | case SIZE_TAG:
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| 190 | /* video resolution override */
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| 191 | if ((ret = get_buffer(pb, preamble, WC3_PREAMBLE_SIZE)) !=
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| 192 | WC3_PREAMBLE_SIZE)
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| 193 | return AVERROR_IO;
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| 194 | wc3->width = LE_32(&preamble[0]);
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| 195 | wc3->height = LE_32(&preamble[4]);
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| 196 | break;
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| 197 |
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| 198 | case PALT_TAG:
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| 199 | /* one of several palettes */
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| 200 | if ((unsigned)current_palette >= wc3->palette_count)
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| 201 | return AVERROR_INVALIDDATA;
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| 202 | if ((ret = get_buffer(pb,
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| 203 | &wc3->palettes[current_palette * PALETTE_SIZE],
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| 204 | PALETTE_SIZE)) != PALETTE_SIZE)
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| 205 | return AVERROR_IO;
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| 206 |
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| 207 | /* transform the current palette in place */
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| 208 | for (i = current_palette * PALETTE_SIZE;
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| 209 | i < (current_palette + 1) * PALETTE_SIZE; i++) {
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| 210 | /* rotate each palette component left by 2 and use the result
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| 211 | * as an index into the color component table */
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| 212 | rotate = ((wc3->palettes[i] << 2) & 0xFF) |
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| 213 | ((wc3->palettes[i] >> 6) & 0xFF);
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| 214 | wc3->palettes[i] = wc3_pal_lookup[rotate];
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| 215 | }
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| 216 | current_palette++;
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| 217 | break;
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| 218 |
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| 219 | default:
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| 220 | av_log(s, AV_LOG_ERROR, " unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n",
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| 221 | preamble[0], preamble[1], preamble[2], preamble[3],
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| 222 | preamble[0], preamble[1], preamble[2], preamble[3]);
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| 223 | return AVERROR_INVALIDDATA;
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| 224 | break;
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| 225 | }
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| 226 |
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| 227 | if ((ret = get_buffer(pb, preamble, WC3_PREAMBLE_SIZE)) !=
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| 228 | WC3_PREAMBLE_SIZE)
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| 229 | return AVERROR_IO;
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| 230 | fourcc_tag = LE_32(&preamble[0]);
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| 231 | /* chunk sizes are 16-bit aligned */
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| 232 | size = (BE_32(&preamble[4]) + 1) & (~1);
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| 233 |
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| 234 | } while (fourcc_tag != BRCH_TAG);
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| 235 |
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| 236 | /* initialize the decoder streams */
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| 237 | st = av_new_stream(s, 0);
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| 238 | if (!st)
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| 239 | return AVERROR_NOMEM;
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| 240 | av_set_pts_info(st, 33, 1, 90000);
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| 241 | wc3->video_stream_index = st->index;
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| 242 | st->codec->codec_type = CODEC_TYPE_VIDEO;
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| 243 | st->codec->codec_id = CODEC_ID_XAN_WC3;
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| 244 | st->codec->codec_tag = 0; /* no fourcc */
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| 245 | st->codec->width = wc3->width;
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| 246 | st->codec->height = wc3->height;
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| 247 |
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| 248 | /* palette considerations */
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| 249 | st->codec->palctrl = &wc3->palette_control;
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| 250 |
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| 251 | st = av_new_stream(s, 0);
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| 252 | if (!st)
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| 253 | return AVERROR_NOMEM;
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| 254 | av_set_pts_info(st, 33, 1, 90000);
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| 255 | wc3->audio_stream_index = st->index;
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| 256 | st->codec->codec_type = CODEC_TYPE_AUDIO;
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| 257 | st->codec->codec_id = CODEC_ID_PCM_S16LE;
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| 258 | st->codec->codec_tag = 1;
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| 259 | st->codec->channels = WC3_AUDIO_CHANNELS;
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| 260 | st->codec->bits_per_sample = WC3_AUDIO_BITS;
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| 261 | st->codec->sample_rate = WC3_SAMPLE_RATE;
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| 262 | st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
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| 263 | st->codec->bits_per_sample;
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| 264 | st->codec->block_align = WC3_AUDIO_BITS * WC3_AUDIO_CHANNELS;
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| 265 |
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| 266 | return 0;
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| 267 | }
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| 268 |
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| 269 | static int wc3_read_packet(AVFormatContext *s,
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| 270 | AVPacket *pkt)
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| 271 | {
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| 272 | Wc3DemuxContext *wc3 = (Wc3DemuxContext *)s->priv_data;
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| 273 | ByteIOContext *pb = &s->pb;
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| 274 | unsigned int fourcc_tag;
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| 275 | unsigned int size;
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| 276 | int packet_read = 0;
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| 277 | int ret = 0;
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| 278 | unsigned char preamble[WC3_PREAMBLE_SIZE];
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| 279 | unsigned char text[1024];
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| 280 | unsigned int palette_number;
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| 281 | int i;
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| 282 | unsigned char r, g, b;
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| 283 | int base_palette_index;
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| 284 |
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| 285 | while (!packet_read) {
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| 286 |
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| 287 | /* get the next chunk preamble */
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| 288 | if ((ret = get_buffer(pb, preamble, WC3_PREAMBLE_SIZE)) !=
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| 289 | WC3_PREAMBLE_SIZE)
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| 290 | ret = AVERROR_IO;
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| 291 |
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| 292 | fourcc_tag = LE_32(&preamble[0]);
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| 293 | /* chunk sizes are 16-bit aligned */
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| 294 | size = (BE_32(&preamble[4]) + 1) & (~1);
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| 295 |
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| 296 | switch (fourcc_tag) {
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| 297 |
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| 298 | case BRCH_TAG:
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| 299 | /* no-op */
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| 300 | break;
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| 301 |
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| 302 | case SHOT_TAG:
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| 303 | /* load up new palette */
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| 304 | if ((ret = get_buffer(pb, preamble, 4)) != 4)
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| 305 | return AVERROR_IO;
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| 306 | palette_number = LE_32(&preamble[0]);
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| 307 | if (palette_number >= wc3->palette_count)
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| 308 | return AVERROR_INVALIDDATA;
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| 309 | base_palette_index = palette_number * PALETTE_COUNT * 3;
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| 310 | for (i = 0; i < PALETTE_COUNT; i++) {
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| 311 | r = wc3->palettes[base_palette_index + i * 3 + 0];
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| 312 | g = wc3->palettes[base_palette_index + i * 3 + 1];
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| 313 | b = wc3->palettes[base_palette_index + i * 3 + 2];
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| 314 | wc3->palette_control.palette[i] = (r << 16) | (g << 8) | (b);
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| 315 | }
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| 316 | wc3->palette_control.palette_changed = 1;
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| 317 | break;
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| 318 |
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| 319 | case VGA__TAG:
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| 320 | /* send out video chunk */
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| 321 | ret= av_get_packet(pb, pkt, size);
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| 322 | pkt->stream_index = wc3->video_stream_index;
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| 323 | pkt->pts = wc3->pts;
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| 324 | if (ret != size)
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| 325 | ret = AVERROR_IO;
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| 326 | packet_read = 1;
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| 327 | break;
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| 328 |
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| 329 | case TEXT_TAG:
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| 330 | /* subtitle chunk */
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| 331 | #if 0
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| 332 | url_fseek(pb, size, SEEK_CUR);
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| 333 | #else
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| 334 | if ((unsigned)size > sizeof(text) || (ret = get_buffer(pb, text, size)) != size)
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| 335 | ret = AVERROR_IO;
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| 336 | else {
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| 337 | int i = 0;
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| 338 | av_log (s, AV_LOG_DEBUG, "Subtitle time!\n");
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| 339 | av_log (s, AV_LOG_DEBUG, " inglish: %s\n", &text[i + 1]);
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| 340 | i += text[i] + 1;
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| 341 | av_log (s, AV_LOG_DEBUG, " doytsch: %s\n", &text[i + 1]);
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| 342 | i += text[i] + 1;
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| 343 | av_log (s, AV_LOG_DEBUG, " fronsay: %s\n", &text[i + 1]);
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| 344 | }
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| 345 | #endif
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| 346 | break;
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| 347 |
|
|---|
| 348 | case AUDI_TAG:
|
|---|
| 349 | /* send out audio chunk */
|
|---|
| 350 | ret= av_get_packet(pb, pkt, size);
|
|---|
| 351 | pkt->stream_index = wc3->audio_stream_index;
|
|---|
| 352 | pkt->pts = wc3->pts;
|
|---|
| 353 | if (ret != size)
|
|---|
| 354 | ret = AVERROR_IO;
|
|---|
| 355 |
|
|---|
| 356 | /* time to advance pts */
|
|---|
| 357 | wc3->pts += WC3_FRAME_PTS_INC;
|
|---|
| 358 |
|
|---|
| 359 | packet_read = 1;
|
|---|
| 360 | break;
|
|---|
| 361 |
|
|---|
| 362 | default:
|
|---|
| 363 | av_log (s, AV_LOG_ERROR, " unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n",
|
|---|
| 364 | preamble[0], preamble[1], preamble[2], preamble[3],
|
|---|
| 365 | preamble[0], preamble[1], preamble[2], preamble[3]);
|
|---|
| 366 | ret = AVERROR_INVALIDDATA;
|
|---|
| 367 | packet_read = 1;
|
|---|
| 368 | break;
|
|---|
| 369 | }
|
|---|
| 370 | }
|
|---|
| 371 |
|
|---|
| 372 | return ret;
|
|---|
| 373 | }
|
|---|
| 374 |
|
|---|
| 375 | static int wc3_read_close(AVFormatContext *s)
|
|---|
| 376 | {
|
|---|
| 377 | Wc3DemuxContext *wc3 = (Wc3DemuxContext *)s->priv_data;
|
|---|
| 378 |
|
|---|
| 379 | av_free(wc3->palettes);
|
|---|
| 380 |
|
|---|
| 381 | return 0;
|
|---|
| 382 | }
|
|---|
| 383 |
|
|---|
| 384 | static AVInputFormat wc3_demuxer = {
|
|---|
| 385 | "wc3movie",
|
|---|
| 386 | "Wing Commander III movie format",
|
|---|
| 387 | sizeof(Wc3DemuxContext),
|
|---|
| 388 | wc3_probe,
|
|---|
| 389 | wc3_read_header,
|
|---|
| 390 | wc3_read_packet,
|
|---|
| 391 | wc3_read_close,
|
|---|
| 392 | };
|
|---|
| 393 |
|
|---|
| 394 | int wc3_init(void)
|
|---|
| 395 | {
|
|---|
| 396 | av_register_input_format(&wc3_demuxer);
|
|---|
| 397 | return 0;
|
|---|
| 398 | }
|
|---|
