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Rev | Author | Line No. | Line |
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6148 | serge | 1 | /* |
2 | * NSV demuxer |
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3 | * Copyright (c) 2004 The FFmpeg Project |
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4 | * |
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5 | * first version by Francois Revol |
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6 | * |
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7 | * This file is part of FFmpeg. |
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8 | * |
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9 | * FFmpeg is free software; you can redistribute it and/or |
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10 | * modify it under the terms of the GNU Lesser General Public |
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11 | * License as published by the Free Software Foundation; either |
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12 | * version 2.1 of the License, or (at your option) any later version. |
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13 | * |
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14 | * FFmpeg is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 | * Lesser General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU Lesser General Public |
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20 | * License along with FFmpeg; if not, write to the Free Software |
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21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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22 | */ |
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23 | |||
24 | #include "libavutil/attributes.h" |
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25 | #include "libavutil/mathematics.h" |
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26 | #include "avformat.h" |
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27 | #include "internal.h" |
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28 | #include "libavutil/dict.h" |
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29 | #include "libavutil/intreadwrite.h" |
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30 | |||
31 | /* max bytes to crawl for trying to resync |
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32 | * stupid streaming servers don't start at chunk boundaries... |
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33 | */ |
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34 | #define NSV_MAX_RESYNC (500*1024) |
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35 | #define NSV_MAX_RESYNC_TRIES 300 |
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36 | |||
37 | /* |
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38 | * References: |
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39 | * (1) http://www.multimedia.cx/nsv-format.txt |
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40 | * seems someone came to the same conclusions as me, and updated it: |
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41 | * (2) http://www.stud.ktu.lt/~vitslav/nsv/nsv-format.txt |
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42 | * http://www.stud.ktu.lt/~vitslav/nsv/ |
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43 | * official docs |
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44 | * (3) http://ultravox.aol.com/NSVFormat.rtf |
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45 | * Sample files: |
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46 | * (S1) http://www.nullsoft.com/nsv/samples/ |
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47 | * http://www.nullsoft.com/nsv/samples/faster.nsv |
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48 | * http://streamripper.sourceforge.net/openbb/read.php?TID=492&page=4 |
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49 | */ |
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50 | |||
51 | /* |
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52 | * notes on the header (Francois Revol): |
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53 | * |
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54 | * It is followed by strings, then a table, but nothing tells |
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55 | * where the table begins according to (1). After checking faster.nsv, |
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56 | * I believe NVSf[16-19] gives the size of the strings data |
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57 | * (that is the offset of the data table after the header). |
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58 | * After checking all samples from (S1) all confirms this. |
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59 | * |
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60 | * Then, about NSVf[12-15], faster.nsf has 179700. When veiwing it in VLC, |
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61 | * I noticed there was about 1 NVSs chunk/s, so I ran |
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62 | * strings faster.nsv | grep NSVs | wc -l |
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63 | * which gave me 180. That leads me to think that NSVf[12-15] might be the |
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64 | * file length in milliseconds. |
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65 | * Let's try that: |
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66 | * for f in *.nsv; do HTIME="$(od -t x4 "$f" | head -1 | sed 's/.* //')"; echo "'$f' $((0x$HTIME))s = $((0x$HTIME/1000/60)):$((0x$HTIME/1000%60))"; done |
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67 | * except for nstrailer (which doesn't have an NSVf header), it repports correct time. |
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68 | * |
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69 | * nsvtrailer.nsv (S1) does not have any NSVf header, only NSVs chunks, |
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70 | * so the header seems to not be mandatory. (for streaming). |
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71 | * |
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72 | * index slice duration check (excepts nsvtrailer.nsv): |
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73 | * for f in [^n]*.nsv; do DUR="$(ffmpeg -i "$f" 2>/dev/null | grep 'NSVf duration' | cut -d ' ' -f 4)"; IC="$(ffmpeg -i "$f" 2>/dev/null | grep 'INDEX ENTRIES' | cut -d ' ' -f 2)"; echo "duration $DUR, slite time $(($DUR/$IC))"; done |
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74 | */ |
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75 | |||
76 | /* |
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77 | * TODO: |
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78 | * - handle timestamps !!! |
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79 | * - use index |
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80 | * - mime-type in probe() |
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81 | * - seek |
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82 | */ |
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83 | |||
84 | #if 0 |
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85 | struct NSVf_header { |
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86 | uint32_t chunk_tag; /* 'NSVf' */ |
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87 | uint32_t chunk_size; |
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88 | uint32_t file_size; /* max 4GB ??? no one learns anything it seems :^) */ |
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89 | uint32_t file_length; //unknown1; /* what about MSB of file_size ? */ |
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90 | uint32_t info_strings_size; /* size of the info strings */ //unknown2; |
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91 | uint32_t table_entries; |
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92 | uint32_t table_entries_used; /* the left ones should be -1 */ |
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93 | }; |
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94 | |||
95 | struct NSVs_header { |
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96 | uint32_t chunk_tag; /* 'NSVs' */ |
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97 | uint32_t v4cc; /* or 'NONE' */ |
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98 | uint32_t a4cc; /* or 'NONE' */ |
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99 | uint16_t vwidth; /* av_assert(vwidth%16==0) */ |
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100 | uint16_t vheight; /* av_assert(vheight%16==0) */ |
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101 | uint8_t framerate; /* value = (framerate&0x80)?frtable[frameratex0x7f]:framerate */ |
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102 | uint16_t unknown; |
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103 | }; |
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104 | |||
105 | struct nsv_avchunk_header { |
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106 | uint8_t vchunk_size_lsb; |
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107 | uint16_t vchunk_size_msb; /* value = (vchunk_size_msb << 4) | (vchunk_size_lsb >> 4) */ |
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108 | uint16_t achunk_size; |
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109 | }; |
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110 | |||
111 | struct nsv_pcm_header { |
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112 | uint8_t bits_per_sample; |
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113 | uint8_t channel_count; |
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114 | uint16_t sample_rate; |
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115 | }; |
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116 | #endif |
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117 | |||
118 | /* variation from avi.h */ |
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119 | /*typedef struct CodecTag { |
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120 | int id; |
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121 | unsigned int tag; |
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122 | } CodecTag;*/ |
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123 | |||
124 | /* tags */ |
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125 | |||
126 | #define T_NSVF MKTAG('N', 'S', 'V', 'f') /* file header */ |
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127 | #define T_NSVS MKTAG('N', 'S', 'V', 's') /* chunk header */ |
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128 | #define T_TOC2 MKTAG('T', 'O', 'C', '2') /* extra index marker */ |
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129 | #define T_NONE MKTAG('N', 'O', 'N', 'E') /* null a/v 4CC */ |
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130 | #define T_SUBT MKTAG('S', 'U', 'B', 'T') /* subtitle aux data */ |
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131 | #define T_ASYN MKTAG('A', 'S', 'Y', 'N') /* async a/v aux marker */ |
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132 | #define T_KEYF MKTAG('K', 'E', 'Y', 'F') /* video keyframe aux marker (addition) */ |
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133 | |||
134 | #define TB_NSVF MKBETAG('N', 'S', 'V', 'f') |
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135 | #define TB_NSVS MKBETAG('N', 'S', 'V', 's') |
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136 | |||
137 | /* hardcoded stream indexes */ |
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138 | #define NSV_ST_VIDEO 0 |
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139 | #define NSV_ST_AUDIO 1 |
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140 | #define NSV_ST_SUBT 2 |
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141 | |||
142 | enum NSVStatus { |
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143 | NSV_UNSYNC, |
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144 | NSV_FOUND_NSVF, |
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145 | NSV_HAS_READ_NSVF, |
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146 | NSV_FOUND_NSVS, |
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147 | NSV_HAS_READ_NSVS, |
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148 | NSV_FOUND_BEEF, |
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149 | NSV_GOT_VIDEO, |
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150 | NSV_GOT_AUDIO, |
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151 | }; |
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152 | |||
153 | typedef struct NSVStream { |
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154 | int frame_offset; /* current frame (video) or byte (audio) counter |
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155 | (used to compute the pts) */ |
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156 | int scale; |
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157 | int rate; |
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158 | int sample_size; /* audio only data */ |
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159 | int start; |
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160 | |||
161 | int new_frame_offset; /* temporary storage (used during seek) */ |
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162 | int cum_len; /* temporary storage (used during seek) */ |
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163 | } NSVStream; |
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164 | |||
165 | typedef struct { |
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166 | int base_offset; |
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167 | int NSVf_end; |
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168 | uint32_t *nsvs_file_offset; |
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169 | int index_entries; |
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170 | enum NSVStatus state; |
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171 | AVPacket ahead[2]; /* [v, a] if .data is !NULL there is something */ |
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172 | /* cached */ |
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173 | int64_t duration; |
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174 | uint32_t vtag, atag; |
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175 | uint16_t vwidth, vheight; |
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176 | int16_t avsync; |
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177 | AVRational framerate; |
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178 | uint32_t *nsvs_timestamps; |
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179 | //DVDemuxContext* dv_demux; |
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180 | } NSVContext; |
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181 | |||
182 | static const AVCodecTag nsv_codec_video_tags[] = { |
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183 | { AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', ' ') }, |
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184 | { AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') }, |
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185 | { AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, |
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186 | { AV_CODEC_ID_VP5, MKTAG('V', 'P', '5', ' ') }, |
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187 | { AV_CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') }, |
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188 | { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', ' ') }, |
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189 | { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') }, |
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190 | { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') }, |
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191 | { AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') }, |
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192 | { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') }, |
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193 | /* |
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194 | { AV_CODEC_ID_VP4, MKTAG('V', 'P', '4', ' ') }, |
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195 | { AV_CODEC_ID_VP4, MKTAG('V', 'P', '4', '0') }, |
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196 | */ |
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197 | { AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') }, /* cf sample xvid decoder from nsv_codec_sdk.zip */ |
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198 | { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', '3') }, |
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199 | { AV_CODEC_ID_NONE, 0 }, |
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200 | }; |
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201 | |||
202 | static const AVCodecTag nsv_codec_audio_tags[] = { |
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203 | { AV_CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') }, |
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204 | { AV_CODEC_ID_AAC, MKTAG('A', 'A', 'C', ' ') }, |
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205 | { AV_CODEC_ID_AAC, MKTAG('A', 'A', 'C', 'P') }, |
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206 | { AV_CODEC_ID_AAC, MKTAG('V', 'L', 'B', ' ') }, |
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207 | { AV_CODEC_ID_SPEEX, MKTAG('S', 'P', 'X', ' ') }, |
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208 | { AV_CODEC_ID_PCM_U16LE, MKTAG('P', 'C', 'M', ' ') }, |
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209 | { AV_CODEC_ID_NONE, 0 }, |
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210 | }; |
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211 | |||
212 | //static int nsv_load_index(AVFormatContext *s); |
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213 | static int nsv_read_chunk(AVFormatContext *s, int fill_header); |
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214 | |||
215 | #define print_tag(str, tag, size) \ |
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216 | av_dlog(NULL, "%s: tag=%c%c%c%c\n", \ |
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217 | str, tag & 0xff, \ |
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218 | (tag >> 8) & 0xff, \ |
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219 | (tag >> 16) & 0xff, \ |
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220 | (tag >> 24) & 0xff); |
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221 | |||
222 | /* try to find something we recognize, and set the state accordingly */ |
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223 | static int nsv_resync(AVFormatContext *s) |
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224 | { |
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225 | NSVContext *nsv = s->priv_data; |
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226 | AVIOContext *pb = s->pb; |
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227 | uint32_t v = 0; |
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228 | int i; |
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229 | |||
230 | av_dlog(s, "%s(), offset = %"PRId64", state = %d\n", __FUNCTION__, avio_tell(pb), nsv->state); |
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231 | |||
232 | //nsv->state = NSV_UNSYNC; |
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233 | |||
234 | for (i = 0; i < NSV_MAX_RESYNC; i++) { |
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235 | if (url_feof(pb)) { |
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236 | av_dlog(s, "NSV EOF\n"); |
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237 | nsv->state = NSV_UNSYNC; |
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238 | return -1; |
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239 | } |
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240 | v <<= 8; |
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241 | v |= avio_r8(pb); |
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242 | if (i < 8) { |
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243 | av_dlog(s, "NSV resync: [%d] = %02x\n", i, v & 0x0FF); |
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244 | } |
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245 | |||
246 | if ((v & 0x0000ffff) == 0xefbe) { /* BEEF */ |
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247 | av_dlog(s, "NSV resynced on BEEF after %d bytes\n", i+1); |
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248 | nsv->state = NSV_FOUND_BEEF; |
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249 | return 0; |
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250 | } |
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251 | /* we read as big-endian, thus the MK*BE* */ |
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252 | if (v == TB_NSVF) { /* NSVf */ |
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253 | av_dlog(s, "NSV resynced on NSVf after %d bytes\n", i+1); |
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254 | nsv->state = NSV_FOUND_NSVF; |
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255 | return 0; |
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256 | } |
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257 | if (v == MKBETAG('N', 'S', 'V', 's')) { /* NSVs */ |
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258 | av_dlog(s, "NSV resynced on NSVs after %d bytes\n", i+1); |
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259 | nsv->state = NSV_FOUND_NSVS; |
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260 | return 0; |
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261 | } |
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262 | |||
263 | } |
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264 | av_dlog(s, "NSV sync lost\n"); |
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265 | return -1; |
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266 | } |
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267 | |||
268 | static int nsv_parse_NSVf_header(AVFormatContext *s) |
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269 | { |
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270 | NSVContext *nsv = s->priv_data; |
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271 | AVIOContext *pb = s->pb; |
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272 | unsigned int av_unused file_size; |
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273 | unsigned int size; |
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274 | int64_t duration; |
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275 | int strings_size; |
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276 | int table_entries; |
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277 | int table_entries_used; |
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278 | |||
279 | av_dlog(s, "%s()\n", __FUNCTION__); |
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280 | |||
281 | nsv->state = NSV_UNSYNC; /* in case we fail */ |
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282 | |||
283 | size = avio_rl32(pb); |
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284 | if (size < 28) |
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285 | return -1; |
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286 | nsv->NSVf_end = size; |
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287 | |||
288 | //s->file_size = (uint32_t)avio_rl32(pb); |
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289 | file_size = (uint32_t)avio_rl32(pb); |
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290 | av_dlog(s, "NSV NSVf chunk_size %u\n", size); |
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291 | av_dlog(s, "NSV NSVf file_size %u\n", file_size); |
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292 | |||
293 | nsv->duration = duration = avio_rl32(pb); /* in ms */ |
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294 | av_dlog(s, "NSV NSVf duration %"PRId64" ms\n", duration); |
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295 | // XXX: store it in AVStreams |
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296 | |||
297 | strings_size = avio_rl32(pb); |
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298 | table_entries = avio_rl32(pb); |
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299 | table_entries_used = avio_rl32(pb); |
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300 | av_dlog(s, "NSV NSVf info-strings size: %d, table entries: %d, bis %d\n", |
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301 | strings_size, table_entries, table_entries_used); |
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302 | if (url_feof(pb)) |
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303 | return -1; |
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304 | |||
305 | av_dlog(s, "NSV got header; filepos %"PRId64"\n", avio_tell(pb)); |
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306 | |||
307 | if (strings_size > 0) { |
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308 | char *strings; /* last byte will be '\0' to play safe with str*() */ |
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309 | char *p, *endp; |
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310 | char *token, *value; |
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311 | char quote; |
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312 | |||
313 | p = strings = av_mallocz((size_t)strings_size + 1); |
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314 | if (!p) |
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315 | return AVERROR(ENOMEM); |
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316 | endp = strings + strings_size; |
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317 | avio_read(pb, strings, strings_size); |
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318 | while (p < endp) { |
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319 | while (*p == ' ') |
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320 | p++; /* strip out spaces */ |
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321 | if (p >= endp-2) |
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322 | break; |
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323 | token = p; |
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324 | p = strchr(p, '='); |
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325 | if (!p || p >= endp-2) |
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326 | break; |
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327 | *p++ = '\0'; |
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328 | quote = *p++; |
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329 | value = p; |
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330 | p = strchr(p, quote); |
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331 | if (!p || p >= endp) |
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332 | break; |
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333 | *p++ = '\0'; |
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334 | av_dlog(s, "NSV NSVf INFO: %s='%s'\n", token, value); |
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335 | av_dict_set(&s->metadata, token, value, 0); |
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336 | } |
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337 | av_free(strings); |
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338 | } |
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339 | if (url_feof(pb)) |
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340 | return -1; |
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341 | |||
342 | av_dlog(s, "NSV got infos; filepos %"PRId64"\n", avio_tell(pb)); |
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343 | |||
344 | if (table_entries_used > 0) { |
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345 | int i; |
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346 | nsv->index_entries = table_entries_used; |
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347 | if((unsigned)table_entries_used >= UINT_MAX / sizeof(uint32_t)) |
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348 | return -1; |
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349 | nsv->nsvs_file_offset = av_malloc((unsigned)table_entries_used * sizeof(uint32_t)); |
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350 | if (!nsv->nsvs_file_offset) |
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351 | return AVERROR(ENOMEM); |
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352 | |||
353 | for(i=0;i |
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354 | nsv->nsvs_file_offset[i] = avio_rl32(pb) + size; |
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355 | |||
356 | if(table_entries > table_entries_used && |
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357 | avio_rl32(pb) == MKTAG('T','O','C','2')) { |
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358 | nsv->nsvs_timestamps = av_malloc((unsigned)table_entries_used*sizeof(uint32_t)); |
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359 | if (!nsv->nsvs_timestamps) |
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360 | return AVERROR(ENOMEM); |
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361 | for(i=0;i |
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362 | nsv->nsvs_timestamps[i] = avio_rl32(pb); |
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363 | } |
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364 | } |
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365 | } |
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366 | |||
367 | av_dlog(s, "NSV got index; filepos %"PRId64"\n", avio_tell(pb)); |
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368 | |||
369 | avio_seek(pb, nsv->base_offset + size, SEEK_SET); /* required for dumbdriving-271.nsv (2 extra bytes) */ |
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370 | |||
371 | if (url_feof(pb)) |
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372 | return -1; |
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373 | nsv->state = NSV_HAS_READ_NSVF; |
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374 | return 0; |
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375 | } |
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376 | |||
377 | static int nsv_parse_NSVs_header(AVFormatContext *s) |
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378 | { |
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379 | NSVContext *nsv = s->priv_data; |
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380 | AVIOContext *pb = s->pb; |
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381 | uint32_t vtag, atag; |
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382 | uint16_t vwidth, vheight; |
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383 | AVRational framerate; |
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384 | int i; |
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385 | AVStream *st; |
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386 | NSVStream *nst; |
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387 | av_dlog(s, "%s()\n", __FUNCTION__); |
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388 | |||
389 | vtag = avio_rl32(pb); |
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390 | atag = avio_rl32(pb); |
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391 | vwidth = avio_rl16(pb); |
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392 | vheight = avio_rl16(pb); |
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393 | i = avio_r8(pb); |
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394 | |||
395 | av_dlog(s, "NSV NSVs framerate code %2x\n", i); |
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396 | if(i&0x80) { /* odd way of giving native framerates from docs */ |
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397 | int t=(i & 0x7F)>>2; |
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398 | if(t<16) framerate = (AVRational){1, t+1}; |
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399 | else framerate = (AVRational){t-15, 1}; |
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400 | |||
401 | if(i&1){ |
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402 | framerate.num *= 1000; |
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403 | framerate.den *= 1001; |
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404 | } |
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405 | |||
406 | if((i&3)==3) framerate.num *= 24; |
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407 | else if((i&3)==2) framerate.num *= 25; |
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408 | else framerate.num *= 30; |
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409 | } |
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410 | else |
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411 | framerate= (AVRational){i, 1}; |
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412 | |||
413 | nsv->avsync = avio_rl16(pb); |
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414 | nsv->framerate = framerate; |
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415 | |||
416 | print_tag("NSV NSVs vtag", vtag, 0); |
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417 | print_tag("NSV NSVs atag", atag, 0); |
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418 | av_dlog(s, "NSV NSVs vsize %dx%d\n", vwidth, vheight); |
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419 | |||
420 | /* XXX change to ap != NULL ? */ |
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421 | if (s->nb_streams == 0) { /* streams not yet published, let's do that */ |
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422 | nsv->vtag = vtag; |
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423 | nsv->atag = atag; |
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424 | nsv->vwidth = vwidth; |
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425 | nsv->vheight = vwidth; |
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426 | if (vtag != T_NONE) { |
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427 | int i; |
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428 | st = avformat_new_stream(s, NULL); |
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429 | if (!st) |
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430 | goto fail; |
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431 | |||
432 | st->id = NSV_ST_VIDEO; |
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433 | nst = av_mallocz(sizeof(NSVStream)); |
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434 | if (!nst) |
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435 | goto fail; |
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436 | st->priv_data = nst; |
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437 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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438 | st->codec->codec_tag = vtag; |
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439 | st->codec->codec_id = ff_codec_get_id(nsv_codec_video_tags, vtag); |
||
440 | st->codec->width = vwidth; |
||
441 | st->codec->height = vheight; |
||
442 | st->codec->bits_per_coded_sample = 24; /* depth XXX */ |
||
443 | |||
444 | avpriv_set_pts_info(st, 64, framerate.den, framerate.num); |
||
445 | st->start_time = 0; |
||
446 | st->duration = av_rescale(nsv->duration, framerate.num, 1000*framerate.den); |
||
447 | |||
448 | for(i=0;i |
||
449 | if(nsv->nsvs_timestamps) { |
||
450 | av_add_index_entry(st, nsv->nsvs_file_offset[i], nsv->nsvs_timestamps[i], |
||
451 | 0, 0, AVINDEX_KEYFRAME); |
||
452 | } else { |
||
453 | int64_t ts = av_rescale(i*nsv->duration/nsv->index_entries, framerate.num, 1000*framerate.den); |
||
454 | av_add_index_entry(st, nsv->nsvs_file_offset[i], ts, 0, 0, AVINDEX_KEYFRAME); |
||
455 | } |
||
456 | } |
||
457 | } |
||
458 | if (atag != T_NONE) { |
||
459 | st = avformat_new_stream(s, NULL); |
||
460 | if (!st) |
||
461 | goto fail; |
||
462 | |||
463 | st->id = NSV_ST_AUDIO; |
||
464 | nst = av_mallocz(sizeof(NSVStream)); |
||
465 | if (!nst) |
||
466 | goto fail; |
||
467 | st->priv_data = nst; |
||
468 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
||
469 | st->codec->codec_tag = atag; |
||
470 | st->codec->codec_id = ff_codec_get_id(nsv_codec_audio_tags, atag); |
||
471 | |||
472 | st->need_parsing = AVSTREAM_PARSE_FULL; /* for PCM we will read a chunk later and put correct info */ |
||
473 | |||
474 | /* set timebase to common denominator of ms and framerate */ |
||
475 | avpriv_set_pts_info(st, 64, 1, framerate.num*1000); |
||
476 | st->start_time = 0; |
||
477 | st->duration = (int64_t)nsv->duration * framerate.num; |
||
478 | } |
||
479 | } else { |
||
480 | if (nsv->vtag != vtag || nsv->atag != atag || nsv->vwidth != vwidth || nsv->vheight != vwidth) { |
||
481 | av_dlog(s, "NSV NSVs header values differ from the first one!!!\n"); |
||
482 | //return -1; |
||
483 | } |
||
484 | } |
||
485 | |||
486 | nsv->state = NSV_HAS_READ_NSVS; |
||
487 | return 0; |
||
488 | fail: |
||
489 | /* XXX */ |
||
490 | nsv->state = NSV_UNSYNC; |
||
491 | return -1; |
||
492 | } |
||
493 | |||
494 | static int nsv_read_header(AVFormatContext *s) |
||
495 | { |
||
496 | NSVContext *nsv = s->priv_data; |
||
497 | int i, err; |
||
498 | |||
499 | av_dlog(s, "%s()\n", __FUNCTION__); |
||
500 | av_dlog(s, "filename '%s'\n", s->filename); |
||
501 | |||
502 | nsv->state = NSV_UNSYNC; |
||
503 | nsv->ahead[0].data = nsv->ahead[1].data = NULL; |
||
504 | |||
505 | for (i = 0; i < NSV_MAX_RESYNC_TRIES; i++) { |
||
506 | if (nsv_resync(s) < 0) |
||
507 | return -1; |
||
508 | if (nsv->state == NSV_FOUND_NSVF) { |
||
509 | err = nsv_parse_NSVf_header(s); |
||
510 | if (err < 0) |
||
511 | return err; |
||
512 | } |
||
513 | /* we need the first NSVs also... */ |
||
514 | if (nsv->state == NSV_FOUND_NSVS) { |
||
515 | err = nsv_parse_NSVs_header(s); |
||
516 | if (err < 0) |
||
517 | return err; |
||
518 | break; /* we just want the first one */ |
||
519 | } |
||
520 | } |
||
521 | if (s->nb_streams < 1) /* no luck so far */ |
||
522 | return -1; |
||
523 | /* now read the first chunk, so we can attempt to decode more info */ |
||
524 | err = nsv_read_chunk(s, 1); |
||
525 | |||
526 | av_dlog(s, "parsed header\n"); |
||
527 | return err; |
||
528 | } |
||
529 | |||
530 | static int nsv_read_chunk(AVFormatContext *s, int fill_header) |
||
531 | { |
||
532 | NSVContext *nsv = s->priv_data; |
||
533 | AVIOContext *pb = s->pb; |
||
534 | AVStream *st[2] = {NULL, NULL}; |
||
535 | NSVStream *nst; |
||
536 | AVPacket *pkt; |
||
537 | int i, err = 0; |
||
538 | uint8_t auxcount; /* number of aux metadata, also 4 bits of vsize */ |
||
539 | uint32_t vsize; |
||
540 | uint16_t asize; |
||
541 | uint16_t auxsize; |
||
542 | |||
543 | av_dlog(s, "%s(%d)\n", __FUNCTION__, fill_header); |
||
544 | |||
545 | if (nsv->ahead[0].data || nsv->ahead[1].data) |
||
546 | return 0; //-1; /* hey! eat what you've in your plate first! */ |
||
547 | |||
548 | null_chunk_retry: |
||
549 | if (url_feof(pb)) |
||
550 | return -1; |
||
551 | |||
552 | for (i = 0; i < NSV_MAX_RESYNC_TRIES && nsv->state < NSV_FOUND_NSVS && !err; i++) |
||
553 | err = nsv_resync(s); |
||
554 | if (err < 0) |
||
555 | return err; |
||
556 | if (nsv->state == NSV_FOUND_NSVS) |
||
557 | err = nsv_parse_NSVs_header(s); |
||
558 | if (err < 0) |
||
559 | return err; |
||
560 | if (nsv->state != NSV_HAS_READ_NSVS && nsv->state != NSV_FOUND_BEEF) |
||
561 | return -1; |
||
562 | |||
563 | auxcount = avio_r8(pb); |
||
564 | vsize = avio_rl16(pb); |
||
565 | asize = avio_rl16(pb); |
||
566 | vsize = (vsize << 4) | (auxcount >> 4); |
||
567 | auxcount &= 0x0f; |
||
568 | av_dlog(s, "NSV CHUNK %d aux, %u bytes video, %d bytes audio\n", auxcount, vsize, asize); |
||
569 | /* skip aux stuff */ |
||
570 | for (i = 0; i < auxcount; i++) { |
||
571 | uint32_t av_unused auxtag; |
||
572 | auxsize = avio_rl16(pb); |
||
573 | auxtag = avio_rl32(pb); |
||
574 | av_dlog(s, "NSV aux data: '%c%c%c%c', %d bytes\n", |
||
575 | (auxtag & 0x0ff), |
||
576 | ((auxtag >> 8) & 0x0ff), |
||
577 | ((auxtag >> 16) & 0x0ff), |
||
578 | ((auxtag >> 24) & 0x0ff), |
||
579 | auxsize); |
||
580 | avio_skip(pb, auxsize); |
||
581 | vsize -= auxsize + sizeof(uint16_t) + sizeof(uint32_t); /* that's becoming braindead */ |
||
582 | } |
||
583 | |||
584 | if (url_feof(pb)) |
||
585 | return -1; |
||
586 | if (!vsize && !asize) { |
||
587 | nsv->state = NSV_UNSYNC; |
||
588 | goto null_chunk_retry; |
||
589 | } |
||
590 | |||
591 | /* map back streams to v,a */ |
||
592 | if (s->nb_streams > 0) |
||
593 | st[s->streams[0]->id] = s->streams[0]; |
||
594 | if (s->nb_streams > 1) |
||
595 | st[s->streams[1]->id] = s->streams[1]; |
||
596 | |||
597 | if (vsize && st[NSV_ST_VIDEO]) { |
||
598 | nst = st[NSV_ST_VIDEO]->priv_data; |
||
599 | pkt = &nsv->ahead[NSV_ST_VIDEO]; |
||
600 | av_get_packet(pb, pkt, vsize); |
||
601 | pkt->stream_index = st[NSV_ST_VIDEO]->index;//NSV_ST_VIDEO; |
||
602 | pkt->dts = nst->frame_offset; |
||
603 | pkt->flags |= nsv->state == NSV_HAS_READ_NSVS ? AV_PKT_FLAG_KEY : 0; /* keyframe only likely on a sync frame */ |
||
604 | for (i = 0; i < FFMIN(8, vsize); i++) |
||
605 | av_dlog(s, "NSV video: [%d] = %02x\n", i, pkt->data[i]); |
||
606 | } |
||
607 | if(st[NSV_ST_VIDEO]) |
||
608 | ((NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset++; |
||
609 | |||
610 | if (asize && st[NSV_ST_AUDIO]) { |
||
611 | nst = st[NSV_ST_AUDIO]->priv_data; |
||
612 | pkt = &nsv->ahead[NSV_ST_AUDIO]; |
||
613 | /* read raw audio specific header on the first audio chunk... */ |
||
614 | /* on ALL audio chunks ?? seems so! */ |
||
615 | if (asize && st[NSV_ST_AUDIO]->codec->codec_tag == MKTAG('P', 'C', 'M', ' ')/* && fill_header*/) { |
||
616 | uint8_t bps; |
||
617 | uint8_t channels; |
||
618 | uint16_t samplerate; |
||
619 | bps = avio_r8(pb); |
||
620 | channels = avio_r8(pb); |
||
621 | samplerate = avio_rl16(pb); |
||
622 | asize-=4; |
||
623 | av_dlog(s, "NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate); |
||
624 | if (fill_header) { |
||
625 | st[NSV_ST_AUDIO]->need_parsing = AVSTREAM_PARSE_NONE; /* we know everything */ |
||
626 | if (bps != 16) { |
||
627 | av_dlog(s, "NSV AUDIO bit/sample != 16 (%d)!!!\n", bps); |
||
628 | } |
||
629 | if(channels) |
||
630 | bps /= channels; // ??? |
||
631 | else |
||
632 | av_log(s, AV_LOG_WARNING, "Channels is 0\n"); |
||
633 | if (bps == 8) |
||
634 | st[NSV_ST_AUDIO]->codec->codec_id = AV_CODEC_ID_PCM_U8; |
||
635 | samplerate /= 4;/* UGH ??? XXX */ |
||
636 | channels = 1; |
||
637 | st[NSV_ST_AUDIO]->codec->channels = channels; |
||
638 | st[NSV_ST_AUDIO]->codec->sample_rate = samplerate; |
||
639 | av_dlog(s, "NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate); |
||
640 | } |
||
641 | } |
||
642 | av_get_packet(pb, pkt, asize); |
||
643 | pkt->stream_index = st[NSV_ST_AUDIO]->index;//NSV_ST_AUDIO; |
||
644 | pkt->flags |= nsv->state == NSV_HAS_READ_NSVS ? AV_PKT_FLAG_KEY : 0; /* keyframe only likely on a sync frame */ |
||
645 | if( nsv->state == NSV_HAS_READ_NSVS && st[NSV_ST_VIDEO] ) { |
||
646 | /* on a nsvs frame we have new information on a/v sync */ |
||
647 | pkt->dts = (((NSVStream*)st[NSV_ST_VIDEO]->priv_data)->frame_offset-1); |
||
648 | pkt->dts *= (int64_t)1000 * nsv->framerate.den; |
||
649 | pkt->dts += (int64_t)nsv->avsync * nsv->framerate.num; |
||
650 | av_dlog(s, "NSV AUDIO: sync:%d, dts:%"PRId64, nsv->avsync, pkt->dts); |
||
651 | } |
||
652 | nst->frame_offset++; |
||
653 | } |
||
654 | |||
655 | nsv->state = NSV_UNSYNC; |
||
656 | return 0; |
||
657 | } |
||
658 | |||
659 | |||
660 | static int nsv_read_packet(AVFormatContext *s, AVPacket *pkt) |
||
661 | { |
||
662 | NSVContext *nsv = s->priv_data; |
||
663 | int i, err = 0; |
||
664 | |||
665 | av_dlog(s, "%s()\n", __FUNCTION__); |
||
666 | |||
667 | /* in case we don't already have something to eat ... */ |
||
668 | if (nsv->ahead[0].data == NULL && nsv->ahead[1].data == NULL) |
||
669 | err = nsv_read_chunk(s, 0); |
||
670 | if (err < 0) |
||
671 | return err; |
||
672 | |||
673 | /* now pick one of the plates */ |
||
674 | for (i = 0; i < 2; i++) { |
||
675 | if (nsv->ahead[i].data) { |
||
676 | av_dlog(s, "%s: using cached packet[%d]\n", __FUNCTION__, i); |
||
677 | /* avoid the cost of new_packet + memcpy(->data) */ |
||
678 | memcpy(pkt, &nsv->ahead[i], sizeof(AVPacket)); |
||
679 | nsv->ahead[i].data = NULL; /* we ate that one */ |
||
680 | return pkt->size; |
||
681 | } |
||
682 | } |
||
683 | |||
684 | /* this restaurant is not approvisionned :^] */ |
||
685 | return -1; |
||
686 | } |
||
687 | |||
688 | static int nsv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
||
689 | { |
||
690 | NSVContext *nsv = s->priv_data; |
||
691 | AVStream *st = s->streams[stream_index]; |
||
692 | NSVStream *nst = st->priv_data; |
||
693 | int index; |
||
694 | |||
695 | index = av_index_search_timestamp(st, timestamp, flags); |
||
696 | if(index < 0) |
||
697 | return -1; |
||
698 | |||
699 | if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0) |
||
700 | return -1; |
||
701 | |||
702 | nst->frame_offset = st->index_entries[index].timestamp; |
||
703 | nsv->state = NSV_UNSYNC; |
||
704 | return 0; |
||
705 | } |
||
706 | |||
707 | static int nsv_read_close(AVFormatContext *s) |
||
708 | { |
||
709 | /* int i; */ |
||
710 | NSVContext *nsv = s->priv_data; |
||
711 | |||
712 | av_freep(&nsv->nsvs_file_offset); |
||
713 | av_freep(&nsv->nsvs_timestamps); |
||
714 | if (nsv->ahead[0].data) |
||
715 | av_free_packet(&nsv->ahead[0]); |
||
716 | if (nsv->ahead[1].data) |
||
717 | av_free_packet(&nsv->ahead[1]); |
||
718 | |||
719 | #if 0 |
||
720 | |||
721 | for(i=0;i |
||
722 | AVStream *st = s->streams[i]; |
||
723 | NSVStream *ast = st->priv_data; |
||
724 | if(ast){ |
||
725 | av_free(ast->index_entries); |
||
726 | av_free(ast); |
||
727 | } |
||
728 | av_free(st->codec->palctrl); |
||
729 | } |
||
730 | |||
731 | #endif |
||
732 | return 0; |
||
733 | } |
||
734 | |||
735 | static int nsv_probe(AVProbeData *p) |
||
736 | { |
||
737 | int i, score = 0; |
||
738 | |||
739 | av_dlog(NULL, "nsv_probe(), buf_size %d\n", p->buf_size); |
||
740 | /* check file header */ |
||
741 | /* streamed files might not have any header */ |
||
742 | if (p->buf[0] == 'N' && p->buf[1] == 'S' && |
||
743 | p->buf[2] == 'V' && (p->buf[3] == 'f' || p->buf[3] == 's')) |
||
744 | return AVPROBE_SCORE_MAX; |
||
745 | /* XXX: do streamed files always start at chunk boundary ?? */ |
||
746 | /* or do we need to search NSVs in the byte stream ? */ |
||
747 | /* seems the servers don't bother starting clean chunks... */ |
||
748 | /* sometimes even the first header is at 9KB or something :^) */ |
||
749 | for (i = 1; i < p->buf_size - 3; i++) { |
||
750 | if (AV_RL32(p->buf + i) == AV_RL32("NSVs")) { |
||
751 | /* Get the chunk size and check if at the end we are getting 0xBEEF */ |
||
752 | int vsize = AV_RL24(p->buf+i+19) >> 4; |
||
753 | int asize = AV_RL16(p->buf+i+22); |
||
754 | int offset = i + 23 + asize + vsize + 1; |
||
755 | if (offset <= p->buf_size - 2 && AV_RL16(p->buf + offset) == 0xBEEF) |
||
756 | return 4*AVPROBE_SCORE_MAX/5; |
||
757 | score = AVPROBE_SCORE_MAX/5; |
||
758 | } |
||
759 | } |
||
760 | /* so we'll have more luck on extension... */ |
||
761 | if (av_match_ext(p->filename, "nsv")) |
||
762 | return AVPROBE_SCORE_EXTENSION; |
||
763 | /* FIXME: add mime-type check */ |
||
764 | return score; |
||
765 | } |
||
766 | |||
767 | AVInputFormat ff_nsv_demuxer = { |
||
768 | .name = "nsv", |
||
769 | .long_name = NULL_IF_CONFIG_SMALL("Nullsoft Streaming Video"), |
||
770 | .priv_data_size = sizeof(NSVContext), |
||
771 | .read_probe = nsv_probe, |
||
772 | .read_header = nsv_read_header, |
||
773 | .read_packet = nsv_read_packet, |
||
774 | .read_close = nsv_read_close, |
||
775 | .read_seek = nsv_read_seek, |
||
776 | };=>>>>>>>>><>>>>>>>>>>16)> |