mirror of
https://github.com/zotanmew/nginx-rtmp-module.git
synced 2024-04-29 11:03:46 +02:00
249 lines
7.1 KiB
C
249 lines
7.1 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_mpegts.h"
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static u_char ngx_rtmp_mpegts_header[] = {
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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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/* TS */
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0x47, 0x50, 0x01, 0x10, 0x00,
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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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0x1b, 0xe1, 0x00, 0xf0, 0x00, /* h264 */
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0x0f, 0xe1, 0x01, 0xf0, 0x00, /* aac */
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/*0x03, 0xe1, 0x01, 0xf0, 0x00,*/ /* mp3 */
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/* CRC */
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0x2f, 0x44, 0xb9, 0x9b, /* crc for aac */
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/*0x4e, 0x59, 0x3d, 0x1e,*/ /* crc for mp3 */
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/* stuffing 157 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
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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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ngx_int_t
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ngx_rtmp_mpegts_write_header(ngx_file_t *file)
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{
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ssize_t rc;
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rc = ngx_write_file(file, ngx_rtmp_mpegts_header,
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sizeof(ngx_rtmp_mpegts_header), 0);
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return rc > 0 ? NGX_OK : rc;
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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_file_t *file, ngx_rtmp_mpegts_frame_t *f,
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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_HTTP, 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 */
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*p++ = 7; /* size */
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*p++ = 0x50; /* random access + PCR */
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p = ngx_rtmp_mpegts_write_pcr(p, f->dts - NGX_RTMP_HLS_DELAY);
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}
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/* PES header */
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*p++ = 0x00;
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*p++ = 0x00;
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*p++ = 0x01;
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*p++ = (u_char) f->sid;
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header_size = 5;
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flags = 0x80; /* PTS */
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if (f->dts != f->pts) {
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header_size += 5;
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flags |= 0x40; /* DTS */
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}
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pes_size = (b->last - b->pos) + header_size + 3;
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if (pes_size > 0xffff) {
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pes_size = 0;
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}
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*p++ = (u_char) (pes_size >> 8);
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*p++ = (u_char) pes_size;
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*p++ = 0x80; /* H222 */
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*p++ = (u_char) flags;
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*p++ = (u_char) header_size;
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p = ngx_rtmp_mpegts_write_pts(p, flags >> 6, f->pts +
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NGX_RTMP_HLS_DELAY);
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if (f->dts != f->pts) {
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p = ngx_rtmp_mpegts_write_pts(p, 1, f->dts +
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NGX_RTMP_HLS_DELAY);
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}
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first = 0;
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}
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body_size = (ngx_uint_t) (packet + sizeof(packet) - p);
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in_size = (ngx_uint_t) (b->last - b->pos);
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if (body_size <= in_size) {
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ngx_memcpy(p, b->pos, body_size);
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b->pos += body_size;
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} else {
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stuff_size = (body_size - in_size);
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if (packet[3] & 0x20) {
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/* has adaptation */
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base = &packet[5] + packet[4];
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p = ngx_movemem(base + stuff_size, base, p - base);
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ngx_memset(base, 0xff, stuff_size);
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packet[4] += (u_char) stuff_size;
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} else {
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/* no adaptation */
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packet[3] |= 0x20;
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p = ngx_movemem(&packet[4] + stuff_size, &packet[4],
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p - &packet[4]);
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packet[4] = (u_char) (stuff_size - 1);
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if (stuff_size >= 2) {
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packet[5] = 0;
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ngx_memset(&packet[6], 0xff, stuff_size - 2);
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}
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}
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ngx_memcpy(p, b->pos, in_size);
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b->pos = b->last;
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}
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rc = ngx_write_file(file, packet, sizeof(packet), file->offset);
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if (rc < 0) {
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return rc;
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}
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}
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return NGX_OK;
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}
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