flv文件解析(纯c解析代码)
参考链接: 1. FLV科普12 FLV脚本数据解析-Metadata Tag解析 https://blog.csdn.net/cabbage2008/article/details/50500021
2. FLV科普9 FLV音频信息 https://blog.csdn.net/cabbage2008/article/details/50445023
3. FLV科普6 FLV Tag以及Tag头信息解析 https://blog.csdn.net/cabbage2008/article/details/50374083
4. FLV科普11 FLV视频信息 https://blog.csdn.net/cabbage2008/article/details/50449857
1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <arpa/inet.h> 5 6 #define TAB44 " " 7 #define PRINTF_DEBUG 8 9 #define MAX_SIGNATURE_LEN 3 10 #define MAX_PRE_TAG_SIZE_LEN 4 11 #define MIN_FLV_HEADER_LEN 9 12 #define MAX_TAG_HEADER_LEN 11 13 #define MAX_PARSE_TAG_NUM 15 14 #define MAX_AMF_STR_SIZE 255 15 16 /************************************************************************************************************ 17 ** flv header: 记录了flv的类型, 版本等信息, 是flv的开头, 一般都差不多, 占9bytes 18 ** 19 ------------------------------------------------------------------------------------------------------------- 20 ** 字段名称 | 长度(bytes) | 有关描述 21 ------------------------------------------------------------------------------------------------------------- 22 ** signature | 3 | 文件标识, 总是为"FLV", 0x46 0x4c 0x56 23 ** version | 1 | 版本(目前为0x01) 24 ** flag | 3 | 文件的标志位说明. 前5位保留, 必须为0; 25 第6位为音频Tag: 1表示有音频; 第七位保留, 为0; 第8位为视频Tag: 1表示有视频 26 ** headersize | 4 | 整个header的长度, 一般为9(版本为0x01时); 大于9表示下面还有扩展信息 27 ************************************************************************************************************/ 28 /* 29 1. unsigned char reserved5: 5, flags_audio: 1, reserved1: 1, flags_video: 1; 30 2. unsigned char : 5, flags_audio: 1, : 1, flags_video: 1; (无名说明无法使用, 仅占位) 31 3. 下面结构体位域的另外两种写法. 32 */ 33 typedef struct t_flv_header 34 { 35 unsigned char signature[MAX_SIGNATURE_LEN+1]; 36 unsigned char version; 37 unsigned char : 5; 38 unsigned char flags_audio: 1; 39 unsigned char : 1; 40 unsigned char flags_video: 1; 41 42 int headersize; 43 } T_FLV_HEADER; 44 45 /************************************************************************************************************ 46 ** tag header 47 ** 48 ------------------------------------------------------------------------------------------------------------- 49 ** 字段名称 | 长度(bytes) | 有关描述 50 ------------------------------------------------------------------------------------------------------------- 51 ** type | 1 | 数据类型, (0x12)为脚本类型; (0x08)为音频类型; (0x09）为视频类型 52 ** data_size | 3 | 数据区长度 53 ** timestamp | 3 | 时间戳, 类型为(0x12)的tag时间戳一直为0, (0xFFFFFF)可以表示长度为4小时, 单位为毫秒. 54 ** timestamp_extended | 1 | 将时间戳扩展为4bytes, 代表高8位, 一般都为0, 长度为4小时的flv一般很少见了 55 ** streamid | 3 | 总为0 56 ************************************************************************************************************/ 57 typedef struct t_flv_tag_header 58 { 59 int type; 60 int data_size; 61 int timestamp; 62 int timestamp_extended; 63 int streamid; 64 } T_FLV_TAG_HEADER; 65 66 /************************************************************************************************************ 67 ** video tag header 68 ** 69 ------------------------------------------------------------------------------------------------------------- 70 ** 字段名称 | 长度(bytes) | 有关描述 71 ------------------------------------------------------------------------------------------------------------- 72 ** FreameType | 4(bits) | FrameType为数据类型, 1为关键帧, 2为非关键帧, 3为h263的非关键帧, 73 4为服务器生成关键帧, 5为视频信息或命令帧. 74 ** CodecId | 4(bits) | CodecID为包装类型, 1为JPEG, 2为H263, 3为Screen video, 75 4为On2 VP6, 5为On2 VP6, 6为Screen videoversion 2, 7为AVC 76 77 CodecID=2, 为H263VideoPacket; 78 CodecID=3, 为ScreenVideopacket; 79 CodecID=4, 为VP6FLVVideoPacket; 80 CodecID=5, 为VP6FLVAlphaVideoPacket; 81 CodecID=6, 为ScreenV2VideoPacket; 82 CodecID=7, 为AVCVideoPacket. 83 84 ** AVCVideoPacket Format: | AVCPacketType(8)| CompostionTime(24) | Data | 85 如果AVCPacketType=0x00, 为AVCSequence Header;--描述了SPS以及PPS的信息; 86 如果AVCPacketType=0x01, 为AVC NALU; 87 如果AVCPacketType=0x02, 为AVC end ofsequence; 88 CompositionTime为相对时间戳: 如果AVCPacketType=0x01, 为相对时间戳; 其它, 均为0; 89 90 Data为负载数据: 91 如果AVCPacketType=0x00, 为AVCDecorderConfigurationRecord; 92 如果AVCPacketType=0x01, 为NALUs; 93 如果AVCPacketType=0x02, 为空. 94 95 AVCDecorderConfigurationRecord格式, 包括文件的信息: 96 | cfgVersion(8) | avcProfile(8) | profileCompatibility(8) |avcLevel(8) | reserved(6) | lengthSizeMinusOne(2) | reserved(3) | numOfSPS(5) |spsLength(16) | sps(n) | numOfPPS(8) | ppsLength(16) | pps(n) | 97 ************************************************************************************************************/ 98 typedef struct t_flv_tag_video_header 99 { 100 unsigned char freameType:4, codecId:4; 101 } T_FLV_TAG_VIDEO_HEADER; 102 103 /************************************************************************************************************ 104 ** AVCDecoderConfigurationRecord 105 ** 106 ------------------------------------------------------------------------------------------------------------- 107 ** 字段名称 | 长度(bytes) | 有关描述 108 ------------------------------------------------------------------------------------------------------------- 109 ** configurationVersion | 1 | 配置版本占用8位, 一定为1 110 ** AVCProfileIndication | 1 | profile_idc占用8位, 从H.264标准SPS第一个字段profile_idc拷贝而来, 指明所用profile 111 ** profile_compatibility | 1 | 占用8位, 从H.264标准SPS拷贝的冗余字 112 ** AVCLevelIndication | 1 | level_idc占用8位, 从H.264标准SPS第一个字段level_idc拷贝而来, 指明所用 level 113 ** reserved | 6b | 保留位占6位, 值一定为'111111' 114 ** lengthSizeMinusOne | 2b | 占用2位, 表示NAL单元头的长度, 0表示1字节, 1表示2字节, 2表示3字节, 3表示4字节 115 ** reserved | 3b | 保留位占3位, 值一定为'111' 116 ** numOfSPS | 5b | numOfSequenceParameterSets占用5位, 表示当前SPS的个数 117 ** SPSLength | 2 | sequenceParameterSetLength占用16位, SPS占用的长度 118 ** SPSData | * | 119 ** numOfPPS | 5b | numOfPictureParameterSets占用8位, 表示当前PPS的个数 120 ** PPSLength | 2 | pictureParameterSetLength占用16位, PPS占用的长度 121 ** PPSData | * | numOfPictureParameterSets占用8位, 表示当前PPS的个数 122 123 AVCProfileIndication, profile_compatibility, AVCLevelIndication就是拷贝SPS的前3个字节 124 ************************************************************************************************************/ 125 typedef struct t_flv_tag_avc_dec_cfg 126 { 127 unsigned char configurationVersion; 128 unsigned char AVCProfileIndication; 129 unsigned char profile_compatibility; 130 unsigned char AVCLevelIndication; 131 unsigned char :6, lengthSizeMinusOne:2; 132 133 unsigned char :3, numOfSequenceParameterSets:5; 134 unsigned short spsLen; 135 unsigned char *spsData; 136 137 unsigned char numOfPictureParameterSets; 138 unsigned short ppsLen; 139 unsigned char *ppsData; 140 } T_FLV_TAG_AVC_DEC_CFG; 141 142 /************************************************************************************************************ 143 ** avc video packet header 144 ** 145 ------------------------------------------------------------------------------------------------------------- 146 ** 字段名称 | 长度(bytes) | 有关描述 147 ------------------------------------------------------------------------------------------------------------- 148 ** AVCPacketType占用1字节 | 1 | 149 ** CompositionTime | 3 | 150 151 AVCVideoPacket同样包括Packet Header和Packet Body两部分： 152 Packet Header: 153 AVCPacketType占用1字节, 仅在AVC时有此字段 154 0, AVC sequence header (SPS、PPS信息等) 155 1, AVC NALU 156 2, AVC end of sequence (lower level NALU sequence ender is not required or supported) 157 158 CompositionTime占用24位, 相对时间戳, 如果AVCPacketType=0x01为相对时间戳; 其它, 均为0; 159 该值表示当前帧的显示时间, tag的时间为解码时间, 显示时间等于 解码时间+CompositionTime. 160 ************************************************************************************************************/ 161 typedef struct t_flv_tag_avc_video_packet 162 { 163 unsigned char avcPacketType; 164 165 int compositionTime; 166 167 union videoPacket 168 { 169 T_FLV_TAG_AVC_DEC_CFG avcDecCfg; 170 } vp; 171 } T_FLV_TAG_AVC_VIDEO_PACKET; 172 173 typedef struct t_flv_tag_audio_header 174 { 175 unsigned char soundFormat:4, soundRate:2, soundSize:1, soundType:1; 176 } T_FLV_TAG_AUDIO_HEADER; 177 178 typedef struct t_flv_tag_aac_spec_cfg 179 { 180 unsigned char audioObjectType:5; 181 unsigned char samplingFreqIndex:4, channelCfg:2; 182 } T_FLV_TAG_AAC_SPEC_CFG; 183 184 typedef struct t_flv_tag_aac_audio_packet 185 { 186 unsigned char aacPacketType; 187 188 union audioPacket 189 { 190 T_FLV_TAG_AAC_SPEC_CFG aacSpecCfg; 191 } ap; 192 } T_FLV_TAG_AAC_AUDIO_PACKET; 193 194 typedef struct t_flv_tag 195 { 196 } T_FLV_TAG; 197 198 /* 小端转double */ 199 static double dealAmfNumber(unsigned char *amfNum) 200 { 201 double d = 0; 202 203 unsigned char *dp = (unsigned char *)&d; 204 205 dp[0] = amfNum[7]; 206 dp[1] = amfNum[6]; 207 dp[2] = amfNum[5]; 208 dp[3] = amfNum[4]; 209 dp[4] = amfNum[3]; 210 dp[5] = amfNum[2]; 211 dp[6] = amfNum[1]; 212 dp[7] = amfNum[0]; 213 214 return d; 215 } 216 217 /* 218 1. DealHeader(const unsigned char* headerData); 219 这样定义会报warning: assignment discards 'const' qualifier from pointer target type, 220 大意是指针丢掉"const"限定符. 221 2. 原因是: data = headerData; 这一句存在丢掉的风险(可通过给*data赋予不同的值, 使得headerData的数据也被修改, 失去const的作用) 222 3. const int *p; //这种情况表示*p是const无法进行修改, 而p是可以进行修改的; 223 int* const p; //这种情况表示p是const无法进行修改, 而*p是可以进行修改的; 224 const int* const p; //这种情况表示*p与p都无法进行修改. 225 */ 226 static void DealFlvHeader(unsigned char* const headerData) 227 { 228 unsigned char *data = NULL; 229 230 T_FLV_HEADER flvHeader = {0}; 231 232 data = headerData; 233 234 memset(&flvHeader, 0x0, sizeof(T_FLV_HEADER)); 235 236 memcpy(flvHeader.signature, data, MAX_SIGNATURE_LEN); 237 238 flvHeader.signature[MAX_SIGNATURE_LEN] = '\0'; 239 240 data += MAX_SIGNATURE_LEN; 241 242 flvHeader.version = data[0]; 243 244 data += 1; 245 246 flvHeader.flags_audio = data[0] >> 2 & 0x1; 247 flvHeader.flags_video = data[0] & 0x1; 248 249 data += 1; 250 251 flvHeader.headersize = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3]; 252 253 if (0x1 != flvHeader.version) 254 { 255 printf("version is not 1, todo...\n"); 256 } 257 258 #ifdef PRINTF_DEBUG 259 printf("+FLV Header\n"); 260 printf("%ssignature: %s, version: %d, flags_audio: %d, flags_video: %d, headersize: %d\n", 261 TAB44, flvHeader.signature, flvHeader.version, flvHeader.flags_audio, flvHeader.flags_video, flvHeader.headersize); 262 #endif 263 } 264 265 static void DealTagHeader(unsigned char* const headerData, T_FLV_TAG_HEADER *tagHeader) 266 { 267 static int videoTagNum = 0; 268 static int audioTagNum = 0; 269 270 unsigned char *data = NULL; 271 272 T_FLV_TAG_HEADER header = {0}; 273 274 data = headerData; 275 276 memset(&header, 0x0, sizeof(T_FLV_TAG_HEADER)); 277 278 header.type = data[0]; 279 280 data += 1; 281 282 header.data_size = (data[0] << 16) | (data[1] << 8) | data[2]; 283 284 data += 3; 285 286 header.timestamp = (data[0] << 16) | (data[1] << 8) | data[2]; 287 288 data += 3; 289 290 header.timestamp_extended = data[0]; 291 292 data += 1; 293 294 header.streamid = (data[0] << 16) | (data[1] << 8) | data[2]; 295 296 memcpy(tagHeader, &header, sizeof(T_FLV_TAG_HEADER)); 297 298 #ifdef PRINTF_DEBUG 299 switch (tagHeader->type) 300 { 301 case 0x12: 302 printf("%s+Script Tag\n", TAB44); 303 304 break; 305 306 case 0x9: 307 videoTagNum++; 308 309 printf("%s+Video Tag[%d]\n", TAB44, videoTagNum); 310 311 break; 312 313 case 0x8: 314 audioTagNum++; 315 316 printf("%s+Audio Tag[%d]\n", TAB44, audioTagNum); 317 318 break; 319 320 default: 321 break; 322 } 323 324 printf("%s%s+Tag Header\n", TAB44, TAB44); 325 printf("%s%s%stype: %d, data_size: %d, timestamp: %d, timestamp_extended: %d, streamid: %d\n", 326 TAB44, TAB44, TAB44, tagHeader->type, tagHeader->data_size, tagHeader->timestamp, tagHeader->timestamp_extended, tagHeader->streamid); 327 #endif 328 } 329 330 /* 331 第一个AMF包： 332 第1个字节表示AMF包类型, 一般总是0x02, 表示字符串, 其他值表示意义请查阅文档. 333 第2-3个字节为UI16类型值, 表示字符串的长度, 一般总是0x000A("onMetaData"长度). 334 后面字节为字符串数据, 一般总为"onMetaData". 335 336 第二个AMF包： 337 第1个字节表示AMF包类型, 一般总是0x08, 表示数组. 338 第2-5个字节为UI32类型值, 表示数组元素的个数. 339 后面即为各数组元素的封装, 数组元素为元素名称和值组成的对. 表示方法如下: 340 第1-2个字节表示元素名称的长度, 假设为L. 后面跟着为长度为L的字符串. 第L+3个字节表示元素值的类型. 341 后面跟着为对应值, 占用字节数取决于值的类型. 342 343 0 = Number type (double, 8) 344 1 = Boolean type 345 2 = String type 346 3 = Object type 347 4 = MovieClip type 348 5 = Null type 349 6 = Undefined type 350 7 = Reference type 351 8 = ECMA array type 352 10 = Strict array type 353 11 = Date type 354 12 = Long string type 355 356 1. 不要频繁的malloc小内存(内存碎片, 代价); 357 2. 如该函数中arrayKey, arrayValue, amfStrData设置成指针, 然后malloc就有问题(字符串后残留上述三个最大长度中的字符); 358 3. 可能的解释: 当用free释放的你用malloc分配的存储空间, 释放的存储空间并没有从进程的地址空间中删除, 而是保留在可用存储区池中, 359 当再次用malloc时只要可用存储区池中有足够的地址空间, 都不会再向内可申请内存了, 而是在可用存储区池中分配了. 360 361 实际分析时: 8的数组后还有一串 00 00 09, 暂时不清楚, 先跳过if (tagDataSize <= 3) 362 */ 363 static void DealScriptTagData(unsigned char* const tagData, unsigned int tagDataSize) 364 { 365 int i = 0; 366 int amfType = 0; 367 int amfIndex = 0; 368 int valueType = 0; 369 int valueSize = 0; 370 int keySize = 0; 371 int arrayCount = 0; 372 int amfStringSize = 0; 373 374 double amfNum = 0; 375 376 unsigned char amfStr[MAX_AMF_STR_SIZE+1] = {0}; 377 378 unsigned char *data = NULL; 379 380 data = tagData; 381 382 for (;;) 383 { 384 if (tagDataSize <= 3) 385 { 386 break; 387 } 388 389 amfType = data[0]; 390 391 amfIndex += 1; 392 393 data += 1; 394 tagDataSize -= 1; 395 396 #ifdef PRINTF_DEBUG 397 printf("%s%s%sAMF%d type: %d\n", TAB44, TAB44, TAB44, amfIndex, amfType); 398 #endif 399 400 switch (amfType) 401 { 402 case 2: 403 amfStringSize = (data[0] << 8) | data[1]; 404 405 #ifdef PRINTF_DEBUG 406 printf("%s%s%sAMF%d String size: %d\n", TAB44, TAB44, TAB44, amfIndex, amfStringSize); 407 #endif 408 409 data += 2; 410 tagDataSize -= 2; 411 412 memset(amfStr, 0x0, sizeof(amfStr)); 413 414 memcpy(amfStr, data, amfStringSize); 415 416 amfStr[amfStringSize] = '\0'; 417 418 #ifdef PRINTF_DEBUG 419 printf("%s%s%sAMF%d String: %s\n", TAB44, TAB44, TAB44, amfIndex, amfStr); 420 #endif 421 422 data += amfStringSize; 423 tagDataSize -= amfStringSize; 424 425 break; 426 427 case 8: 428 arrayCount = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3]; 429 430 #ifdef PRINTF_DEBUG 431 printf("%s%s%sAMF%d Metadata count: %d\n", TAB44, TAB44, TAB44, amfIndex, arrayCount); 432 printf("%s%s%s+Metadata\n", TAB44, TAB44, TAB44); 433 #endif 434 435 data += 4; 436 tagDataSize -= 4; 437 438 for (i=0; i<arrayCount; i++) 439 { 440 keySize = (data[0] << 8) | data[1]; 441 442 data += 2; 443 tagDataSize -= 2; 444 445 memset(amfStr, 0x0, sizeof(amfStr)); 446 447 memcpy(amfStr, data, keySize); 448 449 amfStr[keySize] = '\0'; 450 451 #ifdef PRINTF_DEBUG 452 printf("%s%s%s%s%s: ", TAB44, TAB44, TAB44, TAB44, amfStr); 453 #endif 454 455 data += keySize; 456 tagDataSize -= keySize; 457 458 valueType = data[0]; 459 460 data += 1; 461 tagDataSize -= 1; 462 463 if (0 == valueType) 464 { 465 amfNum = dealAmfNumber(data); 466 #ifdef PRINTF_DEBUG 467 printf("%lf\n", amfNum); 468 #endif 469 470 data += 8; 471 tagDataSize -= 8; 472 } 473 else if (1 == valueType) 474 { 475 #ifdef PRINTF_DEBUG 476 printf("%d\n", data[0]); 477 #endif 478 data += 1; 479 tagDataSize -= 1; 480 } 481 else if (2 == valueType) 482 { 483 valueSize = (data[0] << 8) | data[1]; 484 485 data += 2; 486 tagDataSize -= 2; 487 488 memset(amfStr, 0x0, sizeof(amfStr)); 489 490 memcpy(amfStr, data, valueSize); 491 492 amfStr[valueSize] = '\0'; 493 494 #ifdef PRINTF_DEBUG 495 printf("%s\n", amfStr); 496 #endif 497 498 data += valueSize; 499 tagDataSize -= valueSize; 500 } 501 else 502 { 503 //printf("now can not parse value type: %d\n", valueType); 504 505 return; 506 } 507 } 508 509 break; 510 511 default: 512 break; 513 } 514 } 515 } 516 517 /* 518 Video Header = | FrameType(4) | CodecID(4) | 519 VideoData = | FrameType(4) | CodecID(4) | VideoData(n) | 520 */ 521 static void DealVideoTagData(unsigned char* const tagData) 522 { 523 unsigned char *data = NULL; 524 525 data = tagData; 526 527 T_FLV_TAG_VIDEO_HEADER vTagHeader = {0}; 528 T_FLV_TAG_AVC_VIDEO_PACKET avcVideoPacket = {0}; 529 530 memset(&vTagHeader, 0x0, sizeof(vTagHeader)); 531 532 vTagHeader.freameType = data[0] >> 4 & 0xf; 533 vTagHeader.codecId = data[0] & 0xf; 534 535 data++; 536 537 #ifdef PRINTF_DEBUG 538 printf("%s%s%sFrameType: %d\n", TAB44, TAB44, TAB44, vTagHeader.freameType); 539 printf("%s%s%sCodecId: %d\n", TAB44, TAB44, TAB44, vTagHeader.codecId); 540 #endif 541 542 /* now just avc(h264) */ 543 switch (vTagHeader.codecId) 544 { 545 case 0x07: 546 memset(&avcVideoPacket, 0x0, sizeof(avcVideoPacket)); 547 548 avcVideoPacket.avcPacketType = data[0]; 549 avcVideoPacket.compositionTime = (data[1] << 16) | (data[2] << 8) | data[3]; 550 551 data += 4; 552 553 if (0 == avcVideoPacket.avcPacketType) 554 { 555 #ifdef PRINTF_DEBUG 556 printf("%s%s%s+AVCVideoPacket\n", TAB44, TAB44, TAB44); 557 printf("%s%s%s%sAVCPacketType: %d\n", TAB44, TAB44, TAB44, TAB44, avcVideoPacket.avcPacketType); 558 printf("%s%s%s%sCompositionTime Offset: %d\n", TAB44, TAB44, TAB44, TAB44, avcVideoPacket.compositionTime); 559 #endif 560 printf("%s%s%s%s+AVCDecoderConfigurationRecord\n", TAB44, TAB44, TAB44, TAB44); 561 562 avcVideoPacket.vp.avcDecCfg.configurationVersion = data[0]; 563 avcVideoPacket.vp.avcDecCfg.AVCProfileIndication = data[1]; 564 avcVideoPacket.vp.avcDecCfg.profile_compatibility = data[2]; 565 avcVideoPacket.vp.avcDecCfg.AVCLevelIndication = data[3]; 566 avcVideoPacket.vp.avcDecCfg.lengthSizeMinusOne = data[4] & 0x3; 567 avcVideoPacket.vp.avcDecCfg.numOfSequenceParameterSets = data[5] & 0x1f; 568 avcVideoPacket.vp.avcDecCfg.spsLen = (data[6] << 8) | data[7]; 569 570 // todo, parse sps 571 572 data += (8+avcVideoPacket.vp.avcDecCfg.spsLen); 573 574 avcVideoPacket.vp.avcDecCfg.numOfPictureParameterSets = data[0]; 575 avcVideoPacket.vp.avcDecCfg.ppsLen = (data[1] << 8) | data[2]; 576 577 // todo, parse pps 578 579 #ifdef PRINTF_DEBUG 580 printf("%s%s%s%s%sconfigurationVersion: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.configurationVersion); 581 printf("%s%s%s%s%sAVCProfileIndication: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.AVCProfileIndication); 582 printf("%s%s%s%s%sprofile_compatibility: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.profile_compatibility); 583 printf("%s%s%s%s%sAVCLevelIndication: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.AVCLevelIndication); 584 printf("%s%s%s%s%slengthSizeMinusOne: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.lengthSizeMinusOne); 585 printf("%s%s%s%s%snumOfSequenceParameterSets: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.numOfSequenceParameterSets); 586 printf("%s%s%s%s%ssequenceParameterSetLength: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.spsLen); 587 printf("%s%s%s%s%snumOfPictureParameterSets: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.numOfPictureParameterSets); 588 printf("%s%s%s%s%spictureParameterSetLength: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, avcVideoPacket.vp.avcDecCfg.ppsLen); 589 #endif 590 } 591 else 592 { 593 #ifdef PRINTF_DEBUG 594 printf("%s%s%s+Video Data\n", TAB44, TAB44, TAB44); 595 printf("%s%s%s%sAVCPacketType: %d\n", TAB44, TAB44, TAB44, TAB44, avcVideoPacket.avcPacketType); 596 printf("%s%s%s%sCompositionTime Offset: %d\n", TAB44, TAB44, TAB44, TAB44, avcVideoPacket.compositionTime); 597 printf("%s%s%s%sData\n", TAB44, TAB44, TAB44, TAB44); 598 #endif 599 } 600 601 break; 602 603 default: 604 break; 605 } 606 } 607 608 static void DealAudioTagData(unsigned char* const tagData) 609 { 610 unsigned char *data = NULL; 611 612 data = tagData; 613 614 T_FLV_TAG_AUDIO_HEADER audioHeader = {0}; 615 T_FLV_TAG_AAC_AUDIO_PACKET aPacket = {0}; 616 617 memset(&audioHeader, 0x0, sizeof(T_FLV_TAG_AUDIO_HEADER)); 618 619 audioHeader.soundFormat = (data[0] >> 4) & 0xf; 620 audioHeader.soundRate = (data[0] >> 2) & 0x3; 621 audioHeader.soundSize = (data[0] >> 1) & 0x1; 622 audioHeader.soundType = data[0] & 0x1; 623 624 #ifdef PRINTF_DEBUG 625 printf("%s%s%sSoundFormat: %d\n", TAB44, TAB44, TAB44, audioHeader.soundFormat); 626 627 switch (audioHeader.soundRate) 628 { 629 case 0: 630 printf("%s%s%sSoundRate: 5.5-KHz\n", TAB44, TAB44, TAB44); 631 break; 632 633 case 1: 634 printf("%s%s%sSoundRate: 11-KHz\n", TAB44, TAB44, TAB44); 635 break; 636 637 case 2: 638 printf("%s%s%sSoundRate: 22-KHz\n", TAB44, TAB44, TAB44); 639 break; 640 641 case 3: 642 printf("%s%s%sSoundRate: 44-KHz\n", TAB44, TAB44, TAB44); 643 break; 644 645 default: 646 printf("%s%s%sSoundRate: %d\n", TAB44, TAB44, TAB44, audioHeader.soundRate); 647 } 648 649 switch (audioHeader.soundSize) 650 { 651 case 0: 652 printf("%s%s%sSoundSize: snd8bit\n", TAB44, TAB44, TAB44); 653 break; 654 655 case 1: 656 printf("%s%s%sSoundSize: snd16bit\n", TAB44, TAB44, TAB44); 657 break; 658 659 default: 660 printf("%s%s%sSoundSize: %d\n", TAB44, TAB44, TAB44, audioHeader.soundSize); 661 } 662 663 switch (audioHeader.soundType) 664 { 665 case 0: 666 printf("%s%s%sSoundType: sndMono\n", TAB44, TAB44, TAB44); 667 break; 668 669 case 1: 670 printf("%s%s%sSoundType: sndStereo\n", TAB44, TAB44, TAB44); 671 break; 672 673 default: 674 printf("%s%s%sSoundSize: %d\n", TAB44, TAB44, TAB44, audioHeader.soundSize); 675 } 676 #endif 677 678 data++; 679 680 /* now just for aac */ 681 switch (audioHeader.soundFormat) 682 { 683 case 0xa: 684 memset(&aPacket, 0x0, sizeof(T_FLV_TAG_AAC_AUDIO_PACKET)); 685 686 aPacket.aacPacketType = data[0]; 687 688 if (0 == aPacket.aacPacketType) 689 { 690 #ifdef PRINTF_DEBUG 691 printf("%s%s%s+AACAudioData\n", TAB44, TAB44, TAB44); 692 printf("%s%s%s%sAACPacketType: %d\n", TAB44, TAB44, TAB44, TAB44, aPacket.aacPacketType); 693 #endif 694 aPacket.ap.aacSpecCfg.audioObjectType = (data[1] >> 3) & 0x1f; 695 aPacket.ap.aacSpecCfg.samplingFreqIndex = ((data[1] & 0x7) << 1) | ((data[2] >> 7) & 0x1); 696 aPacket.ap.aacSpecCfg.channelCfg = (data[2] >> 3) & 0xf; 697 698 #ifdef PRINTF_DEBUG 699 printf("%s%s%s%s+AudioSpecificConfig\n", TAB44, TAB44, TAB44, TAB44); 700 701 printf("%s%s%s%s%sAudioObjectType: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, aPacket.ap.aacSpecCfg.audioObjectType); 702 printf("%s%s%s%s%sSamplingFrequencyIndex: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, aPacket.ap.aacSpecCfg.samplingFreqIndex); 703 printf("%s%s%s%s%sChannelConfiguration: %d\n", TAB44, TAB44, TAB44, TAB44, TAB44, aPacket.ap.aacSpecCfg.channelCfg); 704 #endif 705 } 706 else 707 { 708 #ifdef PRINTF_DEBUG 709 printf("%s%s%s+AACAudioData\n", TAB44, TAB44, TAB44); 710 printf("%s%s%s%sAACPacketType: %d\n", TAB44, TAB44, TAB44, TAB44, aPacket.aacPacketType); 711 printf("%s%s%s%sData(Raw AAC frame data)\n", TAB44, TAB44, TAB44, TAB44); 712 #endif 713 } 714 715 break; 716 717 default: 718 break; 719 } 720 } 721 722 static void DealTagData(unsigned char* const tagData, const int tagType, const unsigned int tagSize) 723 { 724 #ifdef PRINTF_DEBUG 725 printf("%s%s%s\n", TAB44, TAB44, "+Tag Data"); 726 #endif 727 728 switch (tagType) 729 { 730 case 0x12: 731 DealScriptTagData(tagData, tagSize); 732 733 break; 734 735 case 0x9: 736 DealVideoTagData(tagData); 737 738 break; 739 740 case 0x8: 741 DealAudioTagData(tagData); 742 743 break; 744 745 default: 746 break; 747 } 748 } 749 750 int main(int argc, char *argv[]) 751 { 752 int dataLen = 0; 753 int previousTagSize = 0; 754 755 FILE *fp = NULL; 756 757 unsigned char *tagData = NULL; 758 759 unsigned char flvHeaderData[MIN_FLV_HEADER_LEN+1] = {0}; 760 unsigned char preTagSizeData[MAX_PRE_TAG_SIZE_LEN+1] = {0}; 761 unsigned char tagHeaderData[MAX_TAG_HEADER_LEN+1] = {0}; 762 763 T_FLV_TAG_HEADER tagHeader = {0}; 764 765 if (2 != argc) 766 { 767 printf("Usage: flvparse **.flv\n"); 768 769 return -1; 770 } 771 772 fp = fopen(argv[1], "rb"); 773 if (!fp) 774 { 775 printf("open file[%s] error!\n", argv[1]); 776 777 return -1; 778 } 779 780 memset(flvHeaderData, 0x0, sizeof(flvHeaderData)); 781 782 dataLen = fread(flvHeaderData, 1, MIN_FLV_HEADER_LEN, fp); 783 if (dataLen != MIN_FLV_HEADER_LEN) 784 { 785 printf("read flv header error!\n"); 786 787 fclose(fp); 788 789 return -1; 790 } 791 792 flvHeaderData[MIN_FLV_HEADER_LEN] = '\0'; 793 794 DealFlvHeader(flvHeaderData); 795 796 #ifdef PRINTF_DEBUG 797 printf("+FLV Body\n"); 798 #endif 799 800 while (1) 801 { 802 memset(preTagSizeData, 0x0, sizeof(preTagSizeData)); 803 804 dataLen = fread(preTagSizeData, 1, MAX_PRE_TAG_SIZE_LEN, fp); 805 if (dataLen != MAX_PRE_TAG_SIZE_LEN) 806 { 807 break; 808 } 809 810 preTagSizeData[MAX_PRE_TAG_SIZE_LEN] = '\0'; 811 812 #ifdef PRINTF_DEBUG 813 printf("%spreviousTagSize: %d\n", TAB44, (preTagSizeData[0]<<24) | (preTagSizeData[1]<<16) | (preTagSizeData[2]<<8) | preTagSizeData[3]); 814 #endif 815 816 memset(tagHeaderData, 0x0, sizeof(tagHeaderData)); 817 818 dataLen = fread(tagHeaderData, 1, MAX_TAG_HEADER_LEN, fp); 819 if (dataLen != MAX_TAG_HEADER_LEN) 820 { 821 continue; 822 } 823 824 memset(&tagHeader, 0x0, sizeof(T_FLV_TAG_HEADER)); 825 826 DealTagHeader(tagHeaderData, &tagHeader); 827 828 tagData = (unsigned char*)malloc(tagHeader.data_size); 829 if (!tagData) 830 { 831 continue; 832 } 833 834 memset(tagData, 0x0, tagHeader.data_size); 835 836 dataLen = fread(tagData, 1, tagHeader.data_size, fp); 837 if (dataLen != tagHeader.data_size) 838 { 839 continue; 840 } 841 842 DealTagData(tagData, tagHeader.type, tagHeader.data_size); 843 844 free(tagData); 845 tagData = NULL; 846 } 847 848 fclose(fp); 849 850 return 0; 851 }
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