559 lines
16 KiB
C
559 lines
16 KiB
C
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/*
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* Copyright (C) Roman Arutyunyan
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include "ngx_rtmp.h"
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#include "ngx_rtmp_mpegts.h"
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u_char ngx_rtmp_mpegts_pat[] = {
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/* TS */
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0x47, 0x40, 0x00, 0x10, 0x00,
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/* PSI */
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0x00, 0xb0, 0x0d, 0x00, 0x01, 0xc1, 0x00, 0x00,
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/* PAT */
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0x00, 0x01, 0xf0, 0x01,
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/* CRC */
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0x2e, 0x70, 0x19, 0x05,
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/* stuffing 167 bytes */
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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};
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static u_char ngx_mpegts_ts_header[] = {
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/* TS */
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0x47, 0x50, 0x01, 0x10, 0x00
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};
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static u_char ngx_mpegts_pmt_header[] = {
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/* PSI */
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0x02, 0xb0, 0x17, 0x00, 0x01, 0xc1, 0x00, 0x00,
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/* PMT */
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0xe1, 0x00,
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0xf0, 0x00
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};
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enum {
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NGX_RTMP_MPEGTS_PID_H264 = 0,
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NGX_RTMP_MPEGTS_PID_H265,
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NGX_RTMP_MPEGTS_PID_AAC,
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NGX_RTMP_MPEGTS_PID_MP3
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};
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static u_char ngx_mpegts_pid[4][5] = {
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{0x1b, 0xe1, 0x00, 0xf0, 0x00}, /* h264 */
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{0x24, 0xe1, 0x00, 0xf0, 0x00}, /* h265 */
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{0x0f, 0xe1, 0x01, 0xf0, 0x00}, /* aac */
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{0x03, 0xe1, 0x01, 0xf0, 0x00} /* mp3 */
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};
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/* 700 ms PCR delay */
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#define NGX_RTMP_HLS_DELAY 63000
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static uint32_t crc32table[256] = {
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0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
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0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
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0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
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0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
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0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
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0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
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0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
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0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
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0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
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0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
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0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
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0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
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0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
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0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
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0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
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0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
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0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
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0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
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0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
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0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
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0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
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0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
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0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
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0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
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0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
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0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
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0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
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0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
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0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
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0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
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0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
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0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
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0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
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0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
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0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
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0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
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0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
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0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
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0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
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0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
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0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
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0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
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0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
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};
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uint32_t
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ngx_rtmp_mpegts_crc32(u_char *crc_buf, const u_char *data, int len)
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{
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int i;
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uint32_t crc = 0xFFFFFFFF;
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for(i = 0; i < len; i++) {
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crc = (crc << 8) ^ crc32table[((crc >> 24) ^ *data++) & 0xFF];
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}
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crc_buf[0] = (crc & 0xff000000) >> 24;
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crc_buf[1] = (crc & 0x00ff0000) >> 16;
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crc_buf[2] = (crc & 0x0000ff00) >> 8;
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crc_buf[3] = crc & 0x000000ff;
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return crc;
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}
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ngx_int_t
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ngx_rtmp_mpegts_gen_pmt(ngx_int_t vcodec, ngx_int_t acodec,
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ngx_log_t *log, u_char *pmt)
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{
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u_char *p, crc_buf[4], *pmt_pos;
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ngx_int_t vpid, apid;
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u_char section_length;
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vpid = -1;
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apid = -1;
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if (vcodec == acodec && vcodec == 0) {
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return NGX_ERROR;
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}
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p = pmt;
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p = ngx_cpymem(p, ngx_mpegts_ts_header, sizeof(ngx_mpegts_ts_header));
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pmt_pos = p;
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p = ngx_cpymem(p, ngx_mpegts_pmt_header, sizeof(ngx_mpegts_pmt_header));
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if (vcodec == 0) {
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// ignore
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} else if (vcodec == NGX_RTMP_VIDEO_H264) {
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vpid = NGX_RTMP_MPEGTS_PID_H264;
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} else if (vcodec == NGX_RTMP_HEVC_CODEC_ID) {
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vpid = NGX_RTMP_MPEGTS_PID_H265;
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} else if (log) {
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ngx_log_error(NGX_LOG_ERR, log, 0,
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"rtmp: gen_pmt| unknown video codec (%d)", vcodec);
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}
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switch (acodec) {
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case 0: //ignore
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break;
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case NGX_RTMP_AUDIO_MP3:
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apid = NGX_RTMP_MPEGTS_PID_MP3;
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break;
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case NGX_RTMP_AUDIO_AAC:
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apid = NGX_RTMP_MPEGTS_PID_AAC;
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break;
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default:
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if (log) {
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ngx_log_error(NGX_LOG_ERR, log, 0,
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"rtmp: gen_pmt| unknown video codec (%d)", vcodec);
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}
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}
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section_length = 13;
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if (vpid != -1) {
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p = ngx_cpymem(p, ngx_mpegts_pid[vpid], 5);
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section_length += 5;
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}
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if (apid != -1) {
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p = ngx_cpymem(p, ngx_mpegts_pid[apid], 5);
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section_length += 5;
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}
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pmt_pos[2] = section_length;
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ngx_rtmp_mpegts_crc32(crc_buf, pmt_pos, p - pmt_pos);
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p = ngx_cpymem(p, crc_buf, 4);
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ngx_memset(p, 0xff, 188 - (p - pmt));
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return NGX_OK;
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}
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static ngx_int_t
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ngx_rtmp_mpegts_write_file(ngx_rtmp_mpegts_file_t *file, u_char *in,
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size_t in_size)
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{
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u_char *out;
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size_t out_size, n;
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ssize_t rc;
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static u_char buf[1024];
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if (!file->encrypt) {
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ngx_log_debug1(NGX_LOG_DEBUG_CORE, file->log, 0,
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"mpegts: write %uz bytes", in_size);
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if (file->whandle == NULL) {
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rc = ngx_write_fd(file->fd, in, in_size);
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if (rc < 0) {
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return NGX_ERROR;
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}
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file->file_size += rc;
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} else {
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rc = file->whandle(file, in, in_size);
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if (rc < 0) {
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return NGX_ERROR;
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}
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}
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return NGX_OK;
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}
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/* encrypt */
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ngx_log_debug1(NGX_LOG_DEBUG_CORE, file->log, 0,
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"mpegts: write %uz encrypted bytes", in_size);
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out = buf;
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out_size = sizeof(buf);
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if (file->size > 0 && file->size + in_size >= 16) {
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ngx_memcpy(file->buf + file->size, in, 16 - file->size);
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in += 16 - file->size;
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in_size -= 16 - file->size;
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AES_cbc_encrypt(file->buf, out, 16, &file->key, file->iv, AES_ENCRYPT);
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out += 16;
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out_size -= 16;
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file->size = 0;
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}
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for ( ;; ) {
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n = in_size & ~0x0f;
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if (n > 0) {
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if (n > out_size) {
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n = out_size;
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}
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AES_cbc_encrypt(in, out, n, &file->key, file->iv, AES_ENCRYPT);
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in += n;
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in_size -= n;
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} else if (out == buf) {
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break;
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}
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rc = ngx_write_fd(file->fd, buf, out - buf + n);
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if (rc < 0) {
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return NGX_ERROR;
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}
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out = buf;
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out_size = sizeof(buf);
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}
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if (in_size) {
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ngx_memcpy(file->buf + file->size, in, in_size);
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file->size += in_size;
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}
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return NGX_OK;
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}
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ngx_int_t
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ngx_rtmp_mpegts_write_header(ngx_rtmp_mpegts_file_t *file)
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{
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ngx_int_t ret;
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u_char pmt[188];
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ret = ngx_rtmp_mpegts_write_file(file, ngx_rtmp_mpegts_pat,
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sizeof(ngx_rtmp_mpegts_pat));
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if (ret != NGX_OK) {
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return ret;
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}
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if (ngx_rtmp_mpegts_gen_pmt(file->vcodec,
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file->acodec, file->log, pmt) != NGX_OK)
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{
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return NGX_ERROR;
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}
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return ngx_rtmp_mpegts_write_file(file, pmt, sizeof(pmt));
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}
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static u_char *
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ngx_rtmp_mpegts_write_pcr(u_char *p, uint64_t pcr)
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{
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*p++ = (u_char) (pcr >> 25);
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*p++ = (u_char) (pcr >> 17);
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*p++ = (u_char) (pcr >> 9);
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*p++ = (u_char) (pcr >> 1);
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*p++ = (u_char) (pcr << 7 | 0x7e);
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*p++ = 0;
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return p;
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}
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static u_char *
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ngx_rtmp_mpegts_write_pts(u_char *p, ngx_uint_t fb, uint64_t pts)
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{
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ngx_uint_t val;
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val = fb << 4 | (((pts >> 30) & 0x07) << 1) | 1;
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*p++ = (u_char) val;
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val = (((pts >> 15) & 0x7fff) << 1) | 1;
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*p++ = (u_char) (val >> 8);
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*p++ = (u_char) val;
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val = (((pts) & 0x7fff) << 1) | 1;
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*p++ = (u_char) (val >> 8);
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*p++ = (u_char) val;
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return p;
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}
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ngx_int_t
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ngx_rtmp_mpegts_write_frame(ngx_rtmp_mpegts_file_t *file,
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ngx_rtmp_mpegts_frame_t *f, ngx_buf_t *b)
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{
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ngx_uint_t pes_size, header_size, body_size, in_size, stuff_size, flags;
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u_char packet[188], *p, *base;
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ngx_int_t first, rc;
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ngx_log_debug6(NGX_LOG_DEBUG_CORE, file->log, 0,
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"mpegts: pid=%ui, sid=%ui, pts=%uL, "
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"dts=%uL, key=%ui, size=%ui",
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f->pid, f->sid, f->pts, f->dts,
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(ngx_uint_t) f->key, (size_t) (b->last - b->pos));
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first = 1;
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while (b->pos < b->last) {
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p = packet;
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f->cc++;
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*p++ = 0x47;
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*p++ = (u_char) (f->pid >> 8);
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if (first) {
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p[-1] |= 0x40;
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}
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*p++ = (u_char) f->pid;
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*p++ = 0x10 | (f->cc & 0x0f); /* payload */
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if (first) {
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if (f->key) {
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packet[3] |= 0x20; /* adaptation */
|
|
|
|
*p++ = 7; /* size */
|
|
*p++ = 0x50; /* random access + PCR */
|
|
|
|
p = ngx_rtmp_mpegts_write_pcr(p, f->dts - NGX_RTMP_HLS_DELAY);
|
|
}
|
|
|
|
/* PES header */
|
|
|
|
*p++ = 0x00;
|
|
*p++ = 0x00;
|
|
*p++ = 0x01;
|
|
*p++ = (u_char) f->sid;
|
|
|
|
header_size = 5;
|
|
flags = 0x80; /* PTS */
|
|
|
|
if (f->dts != f->pts) {
|
|
header_size += 5;
|
|
flags |= 0x40; /* DTS */
|
|
}
|
|
|
|
pes_size = (b->last - b->pos) + header_size + 3;
|
|
if (pes_size > 0xffff) {
|
|
pes_size = 0;
|
|
}
|
|
|
|
*p++ = (u_char) (pes_size >> 8);
|
|
*p++ = (u_char) pes_size;
|
|
*p++ = 0x80; /* H222 */
|
|
*p++ = (u_char) flags;
|
|
*p++ = (u_char) header_size;
|
|
|
|
p = ngx_rtmp_mpegts_write_pts(p, flags >> 6, f->pts +
|
|
NGX_RTMP_HLS_DELAY);
|
|
|
|
if (f->dts != f->pts) {
|
|
p = ngx_rtmp_mpegts_write_pts(p, 1, f->dts +
|
|
NGX_RTMP_HLS_DELAY);
|
|
}
|
|
|
|
first = 0;
|
|
}
|
|
|
|
body_size = (ngx_uint_t) (packet + sizeof(packet) - p);
|
|
in_size = (ngx_uint_t) (b->last - b->pos);
|
|
|
|
if (body_size <= in_size) {
|
|
ngx_memcpy(p, b->pos, body_size);
|
|
b->pos += body_size;
|
|
|
|
} else {
|
|
stuff_size = (body_size - in_size);
|
|
|
|
if (packet[3] & 0x20) {
|
|
|
|
/* has adaptation */
|
|
|
|
base = &packet[5] + packet[4];
|
|
p = ngx_movemem(base + stuff_size, base, p - base);
|
|
ngx_memset(base, 0xff, stuff_size);
|
|
packet[4] += (u_char) stuff_size;
|
|
|
|
} else {
|
|
|
|
/* no adaptation */
|
|
|
|
packet[3] |= 0x20;
|
|
p = ngx_movemem(&packet[4] + stuff_size, &packet[4],
|
|
p - &packet[4]);
|
|
|
|
packet[4] = (u_char) (stuff_size - 1);
|
|
if (stuff_size >= 2) {
|
|
packet[5] = 0;
|
|
ngx_memset(&packet[6], 0xff, stuff_size - 2);
|
|
}
|
|
}
|
|
|
|
ngx_memcpy(p, b->pos, in_size);
|
|
b->pos = b->last;
|
|
}
|
|
|
|
rc = ngx_rtmp_mpegts_write_file(file, packet, sizeof(packet));
|
|
if (rc != NGX_OK) {
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
ngx_int_t
|
|
ngx_rtmp_mpegts_init_encryption(ngx_rtmp_mpegts_file_t *file,
|
|
u_char *key, size_t key_len, uint64_t iv)
|
|
{
|
|
if (AES_set_encrypt_key(key, key_len * 8, &file->key)) {
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
ngx_memzero(file->iv, 8);
|
|
|
|
file->iv[8] = (u_char) (iv >> 56);
|
|
file->iv[9] = (u_char) (iv >> 48);
|
|
file->iv[10] = (u_char) (iv >> 40);
|
|
file->iv[11] = (u_char) (iv >> 32);
|
|
file->iv[12] = (u_char) (iv >> 24);
|
|
file->iv[13] = (u_char) (iv >> 16);
|
|
file->iv[14] = (u_char) (iv >> 8);
|
|
file->iv[15] = (u_char) (iv);
|
|
|
|
file->encrypt = 1;
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
ngx_int_t
|
|
ngx_rtmp_mpegts_open_file(ngx_rtmp_mpegts_file_t *file, u_char *path,
|
|
ngx_log_t *log)
|
|
{
|
|
file->log = log;
|
|
|
|
file->fd = ngx_open_file(path, NGX_FILE_WRONLY, NGX_FILE_TRUNCATE,
|
|
NGX_FILE_DEFAULT_ACCESS);
|
|
|
|
if (file->fd == NGX_INVALID_FILE) {
|
|
ngx_log_error(NGX_LOG_ERR, log, ngx_errno,
|
|
"hls: error creating fragment file");
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
file->size = 0;
|
|
|
|
if (ngx_rtmp_mpegts_write_header(file) != NGX_OK) {
|
|
ngx_log_error(NGX_LOG_ERR, log, ngx_errno,
|
|
"hls: error writing fragment header");
|
|
ngx_close_file(file->fd);
|
|
return NGX_ERROR;
|
|
}
|
|
|
|
return NGX_OK;
|
|
}
|
|
|
|
|
|
ngx_int_t
|
|
ngx_rtmp_mpegts_close_file(ngx_rtmp_mpegts_file_t *file)
|
|
{
|
|
u_char buf[16];
|
|
ssize_t rc;
|
|
|
|
if (file->encrypt) {
|
|
ngx_memset(file->buf + file->size, 16 - file->size, 16 - file->size);
|
|
|
|
AES_cbc_encrypt(file->buf, buf, 16, &file->key, file->iv, AES_ENCRYPT);
|
|
|
|
rc = ngx_write_fd(file->fd, buf, 16);
|
|
if (rc < 0) {
|
|
return NGX_ERROR;
|
|
}
|
|
}
|
|
|
|
ngx_close_file(file->fd);
|
|
|
|
return NGX_OK;
|
|
}
|