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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * LucasArts Smush demuxer |
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| 3 | * Copyright (c) 2006 Cyril Zorin |
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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 | #include "libavutil/intreadwrite.h" |
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| 23 | #include "avformat.h" |
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| 24 | #include "internal.h" |
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| 25 | #include "avio.h" |
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| 26 | |||
| 27 | typedef struct { |
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| 28 | int version; |
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| 29 | int audio_stream_index; |
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| 30 | int video_stream_index; |
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| 31 | } SMUSHContext; |
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| 32 | |||
| 33 | static int smush_read_probe(AVProbeData *p) |
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| 34 | { |
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| 35 | if (((AV_RL32(p->buf) == MKTAG('S', 'A', 'N', 'M') && |
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| 36 | AV_RL32(p->buf + 8) == MKTAG('S', 'H', 'D', 'R')) || |
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| 37 | (AV_RL32(p->buf) == MKTAG('A', 'N', 'I', 'M') && |
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| 38 | AV_RL32(p->buf + 8) == MKTAG('A', 'H', 'D', 'R')))) { |
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| 39 | return AVPROBE_SCORE_MAX; |
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| 40 | } |
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| 41 | |||
| 42 | return 0; |
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| 43 | } |
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| 44 | |||
| 45 | static int smush_read_header(AVFormatContext *ctx) |
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| 46 | { |
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| 47 | SMUSHContext *smush = ctx->priv_data; |
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| 48 | AVIOContext *pb = ctx->pb; |
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| 49 | AVStream *vst, *ast; |
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| 50 | uint32_t magic, nframes, size, subversion, i; |
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| 51 | uint32_t width = 0, height = 0, got_audio = 0, read = 0; |
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| 52 | uint32_t sample_rate, channels, palette[256]; |
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| 53 | |||
| 54 | magic = avio_rb32(pb); |
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| 55 | avio_skip(pb, 4); // skip movie size |
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| 56 | |||
| 57 | if (magic == MKBETAG('A', 'N', 'I', 'M')) { |
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| 58 | if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R')) |
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| 59 | return AVERROR_INVALIDDATA; |
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| 60 | |||
| 61 | size = avio_rb32(pb); |
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| 62 | if (size < 3 * 256 + 6) |
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| 63 | return AVERROR_INVALIDDATA; |
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| 64 | |||
| 65 | smush->version = 0; |
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| 66 | subversion = avio_rl16(pb); |
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| 67 | nframes = avio_rl16(pb); |
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| 68 | |||
| 69 | avio_skip(pb, 2); // skip pad |
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| 70 | |||
| 71 | for (i = 0; i < 256; i++) |
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| 72 | palette[i] = avio_rb24(pb); |
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| 73 | |||
| 74 | avio_skip(pb, size - (3 * 256 + 6)); |
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| 75 | } else if (magic == MKBETAG('S', 'A', 'N', 'M') ) { |
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| 76 | if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R')) |
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| 77 | return AVERROR_INVALIDDATA; |
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| 78 | |||
| 79 | size = avio_rb32(pb); |
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| 80 | if (size < 14) |
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| 81 | return AVERROR_INVALIDDATA; |
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| 82 | |||
| 83 | smush->version = 1; |
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| 84 | subversion = avio_rl16(pb); |
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| 85 | nframes = avio_rl32(pb); |
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| 86 | avio_skip(pb, 2); // skip pad |
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| 87 | width = avio_rl16(pb); |
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| 88 | height = avio_rl16(pb); |
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| 89 | avio_skip(pb, 2); // skip pad |
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| 90 | avio_skip(pb, size - 14); |
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| 91 | |||
| 92 | if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D')) |
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| 93 | return AVERROR_INVALIDDATA; |
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| 94 | |||
| 95 | size = avio_rb32(pb); |
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| 96 | while (!got_audio && ((read + 8) < size)) { |
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| 97 | uint32_t sig, chunk_size; |
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| 98 | |||
| 99 | if (url_feof(pb)) |
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| 100 | return AVERROR_EOF; |
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| 101 | |||
| 102 | sig = avio_rb32(pb); |
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| 103 | chunk_size = avio_rb32(pb); |
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| 104 | read += 8; |
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| 105 | switch (sig) { |
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| 106 | case MKBETAG('W', 'a', 'v', 'e'): |
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| 107 | got_audio = 1; |
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| 108 | sample_rate = avio_rl32(pb); |
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| 109 | channels = avio_rl32(pb); |
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| 110 | avio_skip(pb, chunk_size - 8); |
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| 111 | read += chunk_size; |
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| 112 | break; |
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| 113 | case MKBETAG('B', 'l', '1', '6'): |
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| 114 | case MKBETAG('A', 'N', 'N', 'O'): |
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| 115 | avio_skip(pb, chunk_size); |
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| 116 | read += chunk_size; |
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| 117 | break; |
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| 118 | default: |
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| 119 | return AVERROR_INVALIDDATA; |
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| 120 | break; |
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| 121 | } |
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| 122 | } |
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| 123 | |||
| 124 | avio_skip(pb, size - read); |
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| 125 | } else { |
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| 126 | av_log(ctx, AV_LOG_ERROR, "Wrong magic\n"); |
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| 127 | return AVERROR_INVALIDDATA; |
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| 128 | } |
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| 129 | |||
| 130 | vst = avformat_new_stream(ctx, 0); |
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| 131 | if (!vst) |
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| 132 | return AVERROR(ENOMEM); |
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| 133 | |||
| 134 | smush->video_stream_index = vst->index; |
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| 135 | |||
| 136 | vst->start_time = 0; |
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| 137 | vst->duration = |
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| 138 | vst->nb_frames = nframes; |
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| 139 | vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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| 140 | vst->codec->codec_id = AV_CODEC_ID_SANM; |
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| 141 | vst->codec->codec_tag = 0; |
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| 142 | vst->codec->width = width; |
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| 143 | vst->codec->height = height; |
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| 144 | |||
| 145 | avpriv_set_pts_info(vst, 64, 66667, 1000000); |
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| 146 | |||
| 147 | if (!smush->version) { |
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| 148 | if (ff_alloc_extradata(vst->codec, 1024 + 2)) |
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| 149 | return AVERROR(ENOMEM); |
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| 150 | |||
| 151 | AV_WL16(vst->codec->extradata, subversion); |
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| 152 | for (i = 0; i < 256; i++) |
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| 153 | AV_WL32(vst->codec->extradata + 2 + i * 4, palette[i]); |
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| 154 | } |
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| 155 | |||
| 156 | if (got_audio) { |
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| 157 | ast = avformat_new_stream(ctx, 0); |
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| 158 | if (!ast) |
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| 159 | return AVERROR(ENOMEM); |
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| 160 | |||
| 161 | smush->audio_stream_index = ast->index; |
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| 162 | |||
| 163 | ast->start_time = 0; |
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| 164 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 165 | ast->codec->codec_id = AV_CODEC_ID_VIMA; |
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| 166 | ast->codec->codec_tag = 0; |
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| 167 | ast->codec->sample_rate = sample_rate; |
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| 168 | ast->codec->channels = channels; |
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| 169 | |||
| 170 | avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate); |
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| 171 | } |
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| 172 | |||
| 173 | return 0; |
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| 174 | } |
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| 175 | |||
| 176 | static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt) |
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| 177 | { |
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| 178 | SMUSHContext *smush = ctx->priv_data; |
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| 179 | AVIOContext *pb = ctx->pb; |
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| 180 | int done = 0; |
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| 181 | |||
| 182 | while (!done) { |
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| 183 | uint32_t sig, size; |
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| 184 | |||
| 185 | if (url_feof(pb)) |
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| 186 | return AVERROR_EOF; |
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| 187 | |||
| 188 | sig = avio_rb32(pb); |
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| 189 | size = avio_rb32(pb); |
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| 190 | |||
| 191 | switch (sig) { |
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| 192 | case MKBETAG('F', 'R', 'M', 'E'): |
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| 193 | if (smush->version) |
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| 194 | break; |
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| 195 | if (av_get_packet(pb, pkt, size) < 0) |
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| 196 | return AVERROR(EIO); |
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| 197 | |||
| 198 | pkt->stream_index = smush->video_stream_index; |
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| 199 | done = 1; |
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| 200 | break; |
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| 201 | case MKBETAG('B', 'l', '1', '6'): |
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| 202 | if (av_get_packet(pb, pkt, size) < 0) |
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| 203 | return AVERROR(EIO); |
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| 204 | |||
| 205 | pkt->stream_index = smush->video_stream_index; |
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| 206 | pkt->duration = 1; |
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| 207 | done = 1; |
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| 208 | break; |
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| 209 | case MKBETAG('W', 'a', 'v', 'e'): |
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| 210 | if (size < 13) |
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| 211 | return AVERROR_INVALIDDATA; |
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| 212 | if (av_get_packet(pb, pkt, size) < 13) |
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| 213 | return AVERROR(EIO); |
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| 214 | |||
| 215 | pkt->stream_index = smush->audio_stream_index; |
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| 216 | pkt->flags |= AV_PKT_FLAG_KEY; |
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| 217 | pkt->duration = AV_RB32(pkt->data); |
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| 218 | if (pkt->duration == 0xFFFFFFFFu) |
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| 219 | pkt->duration = AV_RB32(pkt->data + 8); |
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| 220 | done = 1; |
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| 221 | break; |
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| 222 | default: |
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| 223 | avio_skip(pb, size); |
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| 224 | break; |
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| 225 | } |
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| 226 | } |
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| 227 | |||
| 228 | return 0; |
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| 229 | } |
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| 230 | |||
| 231 | AVInputFormat ff_smush_demuxer = { |
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| 232 | .name = "smush", |
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| 233 | .long_name = NULL_IF_CONFIG_SMALL("LucasArts Smush"), |
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| 234 | .priv_data_size = sizeof(SMUSHContext), |
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| 235 | .read_probe = smush_read_probe, |
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| 236 | .read_header = smush_read_header, |
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| 237 | .read_packet = smush_read_packet, |
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| 238 | }; |