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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * Sega FILM Format (CPK) Demuxer |
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| 3 | * Copyright (c) 2003 The FFmpeg Project |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * Sega FILM (.cpk) file demuxer |
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| 25 | * by Mike Melanson (melanson@pcisys.net) |
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| 26 | * For more information regarding the Sega FILM file format, visit: |
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| 27 | * http://www.pcisys.net/~melanson/codecs/ |
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| 28 | */ |
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| 29 | |||
| 30 | #include "libavutil/intreadwrite.h" |
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| 31 | #include "avformat.h" |
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| 32 | #include "internal.h" |
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| 33 | #include "avio_internal.h" |
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| 34 | |||
| 35 | #define FILM_TAG MKBETAG('F', 'I', 'L', 'M') |
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| 36 | #define FDSC_TAG MKBETAG('F', 'D', 'S', 'C') |
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| 37 | #define STAB_TAG MKBETAG('S', 'T', 'A', 'B') |
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| 38 | #define CVID_TAG MKBETAG('c', 'v', 'i', 'd') |
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| 39 | #define RAW_TAG MKBETAG('r', 'a', 'w', ' ') |
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| 40 | |||
| 41 | typedef struct film_sample { |
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| 42 | int stream; |
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| 43 | int64_t sample_offset; |
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| 44 | unsigned int sample_size; |
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| 45 | int64_t pts; |
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| 46 | int keyframe; |
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| 47 | } film_sample; |
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| 48 | |||
| 49 | typedef struct FilmDemuxContext { |
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| 50 | int video_stream_index; |
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| 51 | int audio_stream_index; |
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| 52 | |||
| 53 | enum AVCodecID audio_type; |
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| 54 | unsigned int audio_samplerate; |
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| 55 | unsigned int audio_bits; |
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| 56 | unsigned int audio_channels; |
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| 57 | |||
| 58 | enum AVCodecID video_type; |
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| 59 | unsigned int sample_count; |
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| 60 | film_sample *sample_table; |
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| 61 | unsigned int current_sample; |
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| 62 | |||
| 63 | unsigned int base_clock; |
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| 64 | unsigned int version; |
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| 65 | } FilmDemuxContext; |
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| 66 | |||
| 67 | static int film_probe(AVProbeData *p) |
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| 68 | { |
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| 69 | if (AV_RB32(&p->buf[0]) != FILM_TAG) |
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| 70 | return 0; |
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| 71 | |||
| 72 | if (AV_RB32(&p->buf[16]) != FDSC_TAG) |
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| 73 | return 0; |
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| 74 | |||
| 75 | return AVPROBE_SCORE_MAX; |
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| 76 | } |
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| 77 | |||
| 78 | static int film_read_close(AVFormatContext *s) |
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| 79 | { |
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| 80 | FilmDemuxContext *film = s->priv_data; |
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| 81 | |||
| 82 | av_freep(&film->sample_table); |
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| 83 | |||
| 84 | return 0; |
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| 85 | } |
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| 86 | |||
| 87 | static int film_read_header(AVFormatContext *s) |
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| 88 | { |
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| 89 | FilmDemuxContext *film = s->priv_data; |
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| 90 | AVIOContext *pb = s->pb; |
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| 91 | AVStream *st; |
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| 92 | unsigned char scratch[256]; |
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| 93 | int i, ret; |
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| 94 | unsigned int data_offset; |
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| 95 | unsigned int audio_frame_counter; |
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| 96 | |||
| 97 | film->sample_table = NULL; |
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| 98 | |||
| 99 | /* load the main FILM header */ |
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| 100 | if (avio_read(pb, scratch, 16) != 16) |
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| 101 | return AVERROR(EIO); |
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| 102 | data_offset = AV_RB32(&scratch[4]); |
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| 103 | film->version = AV_RB32(&scratch[8]); |
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| 104 | |||
| 105 | /* load the FDSC chunk */ |
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| 106 | if (film->version == 0) { |
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| 107 | /* special case for Lemmings .film files; 20-byte header */ |
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| 108 | if (avio_read(pb, scratch, 20) != 20) |
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| 109 | return AVERROR(EIO); |
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| 110 | /* make some assumptions about the audio parameters */ |
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| 111 | film->audio_type = AV_CODEC_ID_PCM_S8; |
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| 112 | film->audio_samplerate = 22050; |
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| 113 | film->audio_channels = 1; |
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| 114 | film->audio_bits = 8; |
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| 115 | } else { |
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| 116 | /* normal Saturn .cpk files; 32-byte header */ |
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| 117 | if (avio_read(pb, scratch, 32) != 32) |
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| 118 | return AVERROR(EIO); |
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| 119 | film->audio_samplerate = AV_RB16(&scratch[24]); |
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| 120 | film->audio_channels = scratch[21]; |
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| 121 | film->audio_bits = scratch[22]; |
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| 122 | if (scratch[23] == 2 && film->audio_channels > 0) |
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| 123 | film->audio_type = AV_CODEC_ID_ADPCM_ADX; |
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| 124 | else if (film->audio_channels > 0) { |
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| 125 | if (film->audio_bits == 8) |
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| 126 | film->audio_type = AV_CODEC_ID_PCM_S8_PLANAR; |
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| 127 | else if (film->audio_bits == 16) |
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| 128 | film->audio_type = AV_CODEC_ID_PCM_S16BE_PLANAR; |
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| 129 | else |
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| 130 | film->audio_type = AV_CODEC_ID_NONE; |
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| 131 | } else |
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| 132 | film->audio_type = AV_CODEC_ID_NONE; |
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| 133 | } |
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| 134 | |||
| 135 | if (AV_RB32(&scratch[0]) != FDSC_TAG) |
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| 136 | return AVERROR_INVALIDDATA; |
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| 137 | |||
| 138 | if (AV_RB32(&scratch[8]) == CVID_TAG) { |
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| 139 | film->video_type = AV_CODEC_ID_CINEPAK; |
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| 140 | } else if (AV_RB32(&scratch[8]) == RAW_TAG) { |
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| 141 | film->video_type = AV_CODEC_ID_RAWVIDEO; |
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| 142 | } else { |
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| 143 | film->video_type = AV_CODEC_ID_NONE; |
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| 144 | } |
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| 145 | |||
| 146 | /* initialize the decoder streams */ |
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| 147 | if (film->video_type) { |
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| 148 | st = avformat_new_stream(s, NULL); |
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| 149 | if (!st) |
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| 150 | return AVERROR(ENOMEM); |
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| 151 | film->video_stream_index = st->index; |
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| 152 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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| 153 | st->codec->codec_id = film->video_type; |
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| 154 | st->codec->codec_tag = 0; /* no fourcc */ |
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| 155 | st->codec->width = AV_RB32(&scratch[16]); |
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| 156 | st->codec->height = AV_RB32(&scratch[12]); |
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| 157 | |||
| 158 | if (film->video_type == AV_CODEC_ID_RAWVIDEO) { |
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| 159 | if (scratch[20] == 24) { |
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| 160 | st->codec->pix_fmt = AV_PIX_FMT_RGB24; |
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| 161 | } else { |
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| 162 | av_log(s, AV_LOG_ERROR, "raw video is using unhandled %dbpp\n", scratch[20]); |
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| 163 | return -1; |
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| 164 | } |
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| 165 | } |
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| 166 | } |
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| 167 | |||
| 168 | if (film->audio_type) { |
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| 169 | st = avformat_new_stream(s, NULL); |
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| 170 | if (!st) |
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| 171 | return AVERROR(ENOMEM); |
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| 172 | film->audio_stream_index = st->index; |
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| 173 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 174 | st->codec->codec_id = film->audio_type; |
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| 175 | st->codec->codec_tag = 1; |
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| 176 | st->codec->channels = film->audio_channels; |
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| 177 | st->codec->sample_rate = film->audio_samplerate; |
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| 178 | |||
| 179 | if (film->audio_type == AV_CODEC_ID_ADPCM_ADX) { |
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| 180 | st->codec->bits_per_coded_sample = 18 * 8 / 32; |
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| 181 | st->codec->block_align = st->codec->channels * 18; |
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| 182 | st->need_parsing = AVSTREAM_PARSE_FULL; |
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| 183 | } else { |
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| 184 | st->codec->bits_per_coded_sample = film->audio_bits; |
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| 185 | st->codec->block_align = st->codec->channels * |
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| 186 | st->codec->bits_per_coded_sample / 8; |
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| 187 | } |
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| 188 | |||
| 189 | st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * |
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| 190 | st->codec->bits_per_coded_sample; |
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| 191 | } |
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| 192 | |||
| 193 | /* load the sample table */ |
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| 194 | if (avio_read(pb, scratch, 16) != 16) |
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| 195 | return AVERROR(EIO); |
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| 196 | if (AV_RB32(&scratch[0]) != STAB_TAG) |
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| 197 | return AVERROR_INVALIDDATA; |
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| 198 | film->base_clock = AV_RB32(&scratch[8]); |
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| 199 | film->sample_count = AV_RB32(&scratch[12]); |
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| 200 | if(film->sample_count >= UINT_MAX / sizeof(film_sample)) |
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| 201 | return -1; |
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| 202 | film->sample_table = av_malloc_array(film->sample_count, sizeof(film_sample)); |
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| 203 | if (!film->sample_table) |
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| 204 | return AVERROR(ENOMEM); |
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| 205 | |||
| 206 | for (i = 0; i < s->nb_streams; i++) { |
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| 207 | st = s->streams[i]; |
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| 208 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
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| 209 | avpriv_set_pts_info(st, 33, 1, film->base_clock); |
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| 210 | else |
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| 211 | avpriv_set_pts_info(st, 64, 1, film->audio_samplerate); |
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| 212 | } |
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| 213 | |||
| 214 | audio_frame_counter = 0; |
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| 215 | for (i = 0; i < film->sample_count; i++) { |
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| 216 | /* load the next sample record and transfer it to an internal struct */ |
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| 217 | if (avio_read(pb, scratch, 16) != 16) { |
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| 218 | ret = AVERROR(EIO); |
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| 219 | goto fail; |
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| 220 | } |
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| 221 | film->sample_table[i].sample_offset = |
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| 222 | data_offset + AV_RB32(&scratch[0]); |
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| 223 | film->sample_table[i].sample_size = AV_RB32(&scratch[4]); |
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| 224 | if (film->sample_table[i].sample_size > INT_MAX / 4) { |
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| 225 | ret = AVERROR_INVALIDDATA; |
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| 226 | goto fail; |
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| 227 | } |
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| 228 | if (AV_RB32(&scratch[8]) == 0xFFFFFFFF) { |
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| 229 | film->sample_table[i].stream = film->audio_stream_index; |
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| 230 | film->sample_table[i].pts = audio_frame_counter; |
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| 231 | |||
| 232 | if (film->audio_type == AV_CODEC_ID_ADPCM_ADX) |
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| 233 | audio_frame_counter += (film->sample_table[i].sample_size * 32 / |
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| 234 | (18 * film->audio_channels)); |
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| 235 | else if (film->audio_type != AV_CODEC_ID_NONE) |
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| 236 | audio_frame_counter += (film->sample_table[i].sample_size / |
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| 237 | (film->audio_channels * film->audio_bits / 8)); |
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| 238 | } else { |
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| 239 | film->sample_table[i].stream = film->video_stream_index; |
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| 240 | film->sample_table[i].pts = AV_RB32(&scratch[8]) & 0x7FFFFFFF; |
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| 241 | film->sample_table[i].keyframe = (scratch[8] & 0x80) ? 0 : 1; |
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| 242 | } |
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| 243 | } |
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| 244 | |||
| 245 | film->current_sample = 0; |
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| 246 | |||
| 247 | return 0; |
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| 248 | fail: |
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| 249 | film_read_close(s); |
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| 250 | return ret; |
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| 251 | } |
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| 252 | |||
| 253 | static int film_read_packet(AVFormatContext *s, |
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| 254 | AVPacket *pkt) |
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| 255 | { |
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| 256 | FilmDemuxContext *film = s->priv_data; |
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| 257 | AVIOContext *pb = s->pb; |
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| 258 | film_sample *sample; |
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| 259 | int ret = 0; |
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| 260 | |||
| 261 | if (film->current_sample >= film->sample_count) |
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| 262 | return AVERROR_EOF; |
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| 263 | |||
| 264 | sample = &film->sample_table[film->current_sample]; |
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| 265 | |||
| 266 | /* position the stream (will probably be there anyway) */ |
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| 267 | avio_seek(pb, sample->sample_offset, SEEK_SET); |
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| 268 | |||
| 269 | |||
| 270 | ret= av_get_packet(pb, pkt, sample->sample_size); |
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| 271 | if (ret != sample->sample_size) |
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| 272 | ret = AVERROR(EIO); |
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| 273 | |||
| 274 | pkt->stream_index = sample->stream; |
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| 275 | pkt->pts = sample->pts; |
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| 276 | |||
| 277 | film->current_sample++; |
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| 278 | |||
| 279 | return ret; |
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| 280 | } |
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| 281 | |||
| 282 | AVInputFormat ff_segafilm_demuxer = { |
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| 283 | .name = "film_cpk", |
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| 284 | .long_name = NULL_IF_CONFIG_SMALL("Sega FILM / CPK"), |
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| 285 | .priv_data_size = sizeof(FilmDemuxContext), |
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| 286 | .read_probe = film_probe, |
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| 287 | .read_header = film_read_header, |
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| 288 | .read_packet = film_read_packet, |
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| 289 | .read_close = film_read_close, |
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| 290 | }; |