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4349 | Serge | 1 | /* |
2 | * Smacker demuxer |
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3 | * Copyright (c) 2006 Konstantin Shishkov |
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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 | * Based on http://wiki.multimedia.cx/index.php?title=Smacker |
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24 | */ |
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25 | |||
26 | #include "libavutil/bswap.h" |
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27 | #include "libavutil/channel_layout.h" |
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28 | #include "libavutil/intreadwrite.h" |
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29 | #include "avformat.h" |
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30 | #include "internal.h" |
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31 | |||
32 | #define SMACKER_PAL 0x01 |
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33 | #define SMACKER_FLAG_RING_FRAME 0x01 |
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34 | |||
35 | enum SAudFlags { |
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36 | SMK_AUD_PACKED = 0x80, |
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37 | SMK_AUD_16BITS = 0x20, |
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38 | SMK_AUD_STEREO = 0x10, |
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39 | SMK_AUD_BINKAUD = 0x08, |
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40 | SMK_AUD_USEDCT = 0x04 |
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41 | }; |
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42 | |||
43 | typedef struct SmackerContext { |
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44 | /* Smacker file header */ |
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45 | uint32_t magic; |
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46 | uint32_t width, height; |
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47 | uint32_t frames; |
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48 | int pts_inc; |
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49 | uint32_t flags; |
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50 | uint32_t audio[7]; |
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51 | uint32_t treesize; |
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52 | uint32_t mmap_size, mclr_size, full_size, type_size; |
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53 | uint8_t aflags[7]; |
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54 | uint32_t rates[7]; |
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55 | uint32_t pad; |
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56 | /* frame info */ |
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57 | uint32_t *frm_size; |
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58 | uint8_t *frm_flags; |
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59 | /* internal variables */ |
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60 | int cur_frame; |
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61 | int is_ver4; |
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62 | int64_t cur_pts; |
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63 | /* current frame for demuxing */ |
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64 | uint8_t pal[768]; |
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65 | int indexes[7]; |
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66 | int videoindex; |
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67 | uint8_t *bufs[7]; |
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68 | int buf_sizes[7]; |
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69 | int stream_id[7]; |
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70 | int curstream; |
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71 | int64_t nextpos; |
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72 | int64_t aud_pts[7]; |
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73 | } SmackerContext; |
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74 | |||
75 | typedef struct SmackerFrame { |
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76 | int64_t pts; |
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77 | int stream; |
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78 | } SmackerFrame; |
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79 | |||
80 | /* palette used in Smacker */ |
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81 | static const uint8_t smk_pal[64] = { |
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82 | 0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, |
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83 | 0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C, |
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84 | 0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D, |
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85 | 0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D, |
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86 | 0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E, |
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87 | 0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE, |
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88 | 0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF, |
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89 | 0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF |
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90 | }; |
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91 | |||
92 | |||
93 | static int smacker_probe(AVProbeData *p) |
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94 | { |
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95 | if(p->buf[0] == 'S' && p->buf[1] == 'M' && p->buf[2] == 'K' |
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96 | && (p->buf[3] == '2' || p->buf[3] == '4')) |
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97 | return AVPROBE_SCORE_MAX; |
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98 | else |
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99 | return 0; |
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100 | } |
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101 | |||
102 | static int smacker_read_header(AVFormatContext *s) |
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103 | { |
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104 | AVIOContext *pb = s->pb; |
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105 | SmackerContext *smk = s->priv_data; |
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106 | AVStream *st, *ast[7]; |
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107 | int i, ret; |
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108 | int tbase; |
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109 | |||
110 | /* read and check header */ |
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111 | smk->magic = avio_rl32(pb); |
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112 | if (smk->magic != MKTAG('S', 'M', 'K', '2') && smk->magic != MKTAG('S', 'M', 'K', '4')) |
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113 | return AVERROR_INVALIDDATA; |
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114 | smk->width = avio_rl32(pb); |
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115 | smk->height = avio_rl32(pb); |
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116 | smk->frames = avio_rl32(pb); |
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117 | smk->pts_inc = (int32_t)avio_rl32(pb); |
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118 | smk->flags = avio_rl32(pb); |
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119 | if(smk->flags & SMACKER_FLAG_RING_FRAME) |
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120 | smk->frames++; |
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121 | for(i = 0; i < 7; i++) |
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122 | smk->audio[i] = avio_rl32(pb); |
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123 | smk->treesize = avio_rl32(pb); |
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124 | |||
125 | if(smk->treesize >= UINT_MAX/4){ // smk->treesize + 16 must not overflow (this check is probably redundant) |
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126 | av_log(s, AV_LOG_ERROR, "treesize too large\n"); |
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127 | return AVERROR_INVALIDDATA; |
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128 | } |
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129 | |||
130 | //FIXME remove extradata "rebuilding" |
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131 | smk->mmap_size = avio_rl32(pb); |
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132 | smk->mclr_size = avio_rl32(pb); |
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133 | smk->full_size = avio_rl32(pb); |
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134 | smk->type_size = avio_rl32(pb); |
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135 | for(i = 0; i < 7; i++) { |
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136 | smk->rates[i] = avio_rl24(pb); |
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137 | smk->aflags[i] = avio_r8(pb); |
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138 | } |
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139 | smk->pad = avio_rl32(pb); |
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140 | /* setup data */ |
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141 | if(smk->frames > 0xFFFFFF) { |
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142 | av_log(s, AV_LOG_ERROR, "Too many frames: %i\n", smk->frames); |
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143 | return AVERROR_INVALIDDATA; |
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144 | } |
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145 | smk->frm_size = av_malloc_array(smk->frames, sizeof(*smk->frm_size)); |
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146 | smk->frm_flags = av_malloc(smk->frames); |
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147 | if (!smk->frm_size || !smk->frm_flags) { |
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148 | av_freep(&smk->frm_size); |
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149 | av_freep(&smk->frm_flags); |
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150 | return AVERROR(ENOMEM); |
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151 | } |
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152 | |||
153 | smk->is_ver4 = (smk->magic != MKTAG('S', 'M', 'K', '2')); |
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154 | |||
155 | /* read frame info */ |
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156 | for(i = 0; i < smk->frames; i++) { |
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157 | smk->frm_size[i] = avio_rl32(pb); |
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158 | } |
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159 | for(i = 0; i < smk->frames; i++) { |
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160 | smk->frm_flags[i] = avio_r8(pb); |
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161 | } |
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162 | |||
163 | /* init video codec */ |
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164 | st = avformat_new_stream(s, NULL); |
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165 | if (!st) |
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166 | return AVERROR(ENOMEM); |
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167 | smk->videoindex = st->index; |
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168 | st->codec->width = smk->width; |
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169 | st->codec->height = smk->height; |
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170 | st->codec->pix_fmt = AV_PIX_FMT_PAL8; |
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171 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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172 | st->codec->codec_id = AV_CODEC_ID_SMACKVIDEO; |
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173 | st->codec->codec_tag = smk->magic; |
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174 | /* Smacker uses 100000 as internal timebase */ |
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175 | if(smk->pts_inc < 0) |
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176 | smk->pts_inc = -smk->pts_inc; |
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177 | else |
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178 | smk->pts_inc *= 100; |
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179 | tbase = 100000; |
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180 | av_reduce(&tbase, &smk->pts_inc, tbase, smk->pts_inc, (1UL<<31)-1); |
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181 | avpriv_set_pts_info(st, 33, smk->pts_inc, tbase); |
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182 | st->duration = smk->frames; |
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183 | /* handle possible audio streams */ |
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184 | for(i = 0; i < 7; i++) { |
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185 | smk->indexes[i] = -1; |
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186 | if (smk->rates[i]) { |
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187 | ast[i] = avformat_new_stream(s, NULL); |
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188 | if (!ast[i]) |
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189 | return AVERROR(ENOMEM); |
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190 | smk->indexes[i] = ast[i]->index; |
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191 | ast[i]->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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192 | if (smk->aflags[i] & SMK_AUD_BINKAUD) { |
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193 | ast[i]->codec->codec_id = AV_CODEC_ID_BINKAUDIO_RDFT; |
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194 | } else if (smk->aflags[i] & SMK_AUD_USEDCT) { |
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195 | ast[i]->codec->codec_id = AV_CODEC_ID_BINKAUDIO_DCT; |
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196 | } else if (smk->aflags[i] & SMK_AUD_PACKED){ |
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197 | ast[i]->codec->codec_id = AV_CODEC_ID_SMACKAUDIO; |
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198 | ast[i]->codec->codec_tag = MKTAG('S', 'M', 'K', 'A'); |
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199 | } else { |
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200 | ast[i]->codec->codec_id = AV_CODEC_ID_PCM_U8; |
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201 | } |
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202 | if (smk->aflags[i] & SMK_AUD_STEREO) { |
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203 | ast[i]->codec->channels = 2; |
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204 | ast[i]->codec->channel_layout = AV_CH_LAYOUT_STEREO; |
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205 | } else { |
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206 | ast[i]->codec->channels = 1; |
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207 | ast[i]->codec->channel_layout = AV_CH_LAYOUT_MONO; |
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208 | } |
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209 | ast[i]->codec->sample_rate = smk->rates[i]; |
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210 | ast[i]->codec->bits_per_coded_sample = (smk->aflags[i] & SMK_AUD_16BITS) ? 16 : 8; |
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211 | if(ast[i]->codec->bits_per_coded_sample == 16 && ast[i]->codec->codec_id == AV_CODEC_ID_PCM_U8) |
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212 | ast[i]->codec->codec_id = AV_CODEC_ID_PCM_S16LE; |
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213 | avpriv_set_pts_info(ast[i], 64, 1, ast[i]->codec->sample_rate |
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214 | * ast[i]->codec->channels * ast[i]->codec->bits_per_coded_sample / 8); |
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215 | } |
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216 | } |
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217 | |||
218 | |||
219 | /* load trees to extradata, they will be unpacked by decoder */ |
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220 | if(ff_alloc_extradata(st->codec, smk->treesize + 16)){ |
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221 | av_log(s, AV_LOG_ERROR, "Cannot allocate %i bytes of extradata\n", smk->treesize + 16); |
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222 | av_freep(&smk->frm_size); |
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223 | av_freep(&smk->frm_flags); |
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224 | return AVERROR(ENOMEM); |
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225 | } |
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226 | ret = avio_read(pb, st->codec->extradata + 16, st->codec->extradata_size - 16); |
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227 | if(ret != st->codec->extradata_size - 16){ |
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228 | av_freep(&smk->frm_size); |
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229 | av_freep(&smk->frm_flags); |
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230 | return AVERROR(EIO); |
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231 | } |
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232 | ((int32_t*)st->codec->extradata)[0] = av_le2ne32(smk->mmap_size); |
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233 | ((int32_t*)st->codec->extradata)[1] = av_le2ne32(smk->mclr_size); |
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234 | ((int32_t*)st->codec->extradata)[2] = av_le2ne32(smk->full_size); |
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235 | ((int32_t*)st->codec->extradata)[3] = av_le2ne32(smk->type_size); |
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236 | |||
237 | smk->curstream = -1; |
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238 | smk->nextpos = avio_tell(pb); |
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239 | |||
240 | return 0; |
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241 | } |
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242 | |||
243 | |||
244 | static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt) |
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245 | { |
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246 | SmackerContext *smk = s->priv_data; |
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247 | int flags; |
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248 | int ret; |
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249 | int i; |
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250 | int frame_size = 0; |
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251 | int palchange = 0; |
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252 | |||
253 | if (url_feof(s->pb) || smk->cur_frame >= smk->frames) |
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254 | return AVERROR_EOF; |
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255 | |||
256 | /* if we demuxed all streams, pass another frame */ |
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257 | if(smk->curstream < 0) { |
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258 | avio_seek(s->pb, smk->nextpos, 0); |
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259 | frame_size = smk->frm_size[smk->cur_frame] & (~3); |
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260 | flags = smk->frm_flags[smk->cur_frame]; |
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261 | /* handle palette change event */ |
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262 | if(flags & SMACKER_PAL){ |
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263 | int size, sz, t, off, j, pos; |
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264 | uint8_t *pal = smk->pal; |
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265 | uint8_t oldpal[768]; |
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266 | |||
267 | memcpy(oldpal, pal, 768); |
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268 | size = avio_r8(s->pb); |
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269 | size = size * 4 - 1; |
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270 | if(size + 1 > frame_size) |
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271 | return AVERROR_INVALIDDATA; |
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272 | frame_size -= size; |
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273 | frame_size--; |
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274 | sz = 0; |
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275 | pos = avio_tell(s->pb) + size; |
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276 | while(sz < 256){ |
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277 | t = avio_r8(s->pb); |
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278 | if(t & 0x80){ /* skip palette entries */ |
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279 | sz += (t & 0x7F) + 1; |
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280 | pal += ((t & 0x7F) + 1) * 3; |
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281 | } else if(t & 0x40){ /* copy with offset */ |
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282 | off = avio_r8(s->pb); |
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283 | j = (t & 0x3F) + 1; |
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284 | if (off + j > 0x100) { |
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285 | av_log(s, AV_LOG_ERROR, |
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286 | "Invalid palette update, offset=%d length=%d extends beyond palette size\n", |
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287 | off, j); |
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288 | return AVERROR_INVALIDDATA; |
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289 | } |
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290 | off *= 3; |
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291 | while(j-- && sz < 256) { |
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292 | *pal++ = oldpal[off + 0]; |
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293 | *pal++ = oldpal[off + 1]; |
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294 | *pal++ = oldpal[off + 2]; |
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295 | sz++; |
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296 | off += 3; |
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297 | } |
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298 | } else { /* new entries */ |
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299 | *pal++ = smk_pal[t]; |
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300 | *pal++ = smk_pal[avio_r8(s->pb) & 0x3F]; |
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301 | *pal++ = smk_pal[avio_r8(s->pb) & 0x3F]; |
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302 | sz++; |
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303 | } |
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304 | } |
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305 | avio_seek(s->pb, pos, 0); |
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306 | palchange |= 1; |
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307 | } |
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308 | flags >>= 1; |
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309 | smk->curstream = -1; |
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310 | /* if audio chunks are present, put them to stack and retrieve later */ |
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311 | for(i = 0; i < 7; i++) { |
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312 | if(flags & 1) { |
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313 | uint32_t size; |
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314 | int err; |
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315 | |||
316 | size = avio_rl32(s->pb) - 4; |
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317 | if (!size || size + 4L > frame_size) { |
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318 | av_log(s, AV_LOG_ERROR, "Invalid audio part size\n"); |
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319 | return AVERROR_INVALIDDATA; |
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320 | } |
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321 | frame_size -= size; |
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322 | frame_size -= 4; |
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323 | smk->curstream++; |
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324 | if ((err = av_reallocp(&smk->bufs[smk->curstream], size)) < 0) { |
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325 | smk->buf_sizes[smk->curstream] = 0; |
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326 | return err; |
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327 | } |
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328 | smk->buf_sizes[smk->curstream] = size; |
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329 | ret = avio_read(s->pb, smk->bufs[smk->curstream], size); |
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330 | if(ret != size) |
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331 | return AVERROR(EIO); |
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332 | smk->stream_id[smk->curstream] = smk->indexes[i]; |
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333 | } |
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334 | flags >>= 1; |
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335 | } |
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336 | if (frame_size < 0 || frame_size >= INT_MAX/2) |
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337 | return AVERROR_INVALIDDATA; |
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338 | if (av_new_packet(pkt, frame_size + 769)) |
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339 | return AVERROR(ENOMEM); |
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340 | if(smk->frm_size[smk->cur_frame] & 1) |
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341 | palchange |= 2; |
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342 | pkt->data[0] = palchange; |
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343 | memcpy(pkt->data + 1, smk->pal, 768); |
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344 | ret = avio_read(s->pb, pkt->data + 769, frame_size); |
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345 | if(ret != frame_size) |
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346 | return AVERROR(EIO); |
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347 | pkt->stream_index = smk->videoindex; |
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348 | pkt->pts = smk->cur_frame; |
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349 | pkt->size = ret + 769; |
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350 | smk->cur_frame++; |
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351 | smk->nextpos = avio_tell(s->pb); |
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352 | } else { |
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353 | if (smk->stream_id[smk->curstream] < 0 || !smk->bufs[smk->curstream]) |
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354 | return AVERROR_INVALIDDATA; |
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355 | if (av_new_packet(pkt, smk->buf_sizes[smk->curstream])) |
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356 | return AVERROR(ENOMEM); |
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357 | memcpy(pkt->data, smk->bufs[smk->curstream], smk->buf_sizes[smk->curstream]); |
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358 | pkt->size = smk->buf_sizes[smk->curstream]; |
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359 | pkt->stream_index = smk->stream_id[smk->curstream]; |
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360 | pkt->pts = smk->aud_pts[smk->curstream]; |
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361 | smk->aud_pts[smk->curstream] += AV_RL32(pkt->data); |
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362 | smk->curstream--; |
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363 | } |
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364 | |||
365 | return 0; |
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366 | } |
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367 | |||
368 | static int smacker_read_close(AVFormatContext *s) |
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369 | { |
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370 | SmackerContext *smk = s->priv_data; |
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371 | int i; |
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372 | |||
373 | for(i = 0; i < 7; i++) |
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374 | av_freep(&smk->bufs[i]); |
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375 | av_freep(&smk->frm_size); |
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376 | av_freep(&smk->frm_flags); |
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377 | |||
378 | return 0; |
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379 | } |
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380 | |||
381 | AVInputFormat ff_smacker_demuxer = { |
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382 | .name = "smk", |
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383 | .long_name = NULL_IF_CONFIG_SMALL("Smacker"), |
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384 | .priv_data_size = sizeof(SmackerContext), |
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385 | .read_probe = smacker_probe, |
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386 | .read_header = smacker_read_header, |
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387 | .read_packet = smacker_read_packet, |
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388 | .read_close = smacker_read_close, |
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389 | };>>>>>>>>>31)-1); |