mirror of
https://github.com/zotanmew/nginx-rtmp-module.git
synced 2024-06-28 16:09:00 +02:00
534 lines
16 KiB
C
534 lines
16 KiB
C
/*
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* Copyright (c) 2012 Roman Arutyunyan
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*/
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#include "ngx_rtmp_live_module.h"
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#include "ngx_rtmp_cmd_module.h"
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#include "ngx_rtmp_codec_module.h"
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static ngx_rtmp_publish_pt next_publish;
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static ngx_rtmp_play_pt next_play;
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static ngx_rtmp_close_stream_pt next_close_stream;
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static ngx_int_t ngx_rtmp_live_postconfiguration(ngx_conf_t *cf);
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static void * ngx_rtmp_live_create_app_conf(ngx_conf_t *cf);
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static char * ngx_rtmp_live_merge_app_conf(ngx_conf_t *cf,
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void *parent, void *child);
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#define NGX_RTMP_LIVE_TIME_ABSOLUTE 0x01
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#define NGX_RTMP_LIVE_TIME_RELATIVE 0x02
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static ngx_command_t ngx_rtmp_live_commands[] = {
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{ ngx_string("live"),
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NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_flag_slot,
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NGX_RTMP_APP_CONF_OFFSET,
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offsetof(ngx_rtmp_live_app_conf_t, live),
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NULL },
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{ ngx_string("meta"),
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NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_flag_slot,
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NGX_RTMP_APP_CONF_OFFSET,
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offsetof(ngx_rtmp_live_app_conf_t, meta),
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NULL },
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{ ngx_string("stream_buckets"),
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NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_RTMP_APP_CONF_OFFSET,
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offsetof(ngx_rtmp_live_app_conf_t, nbuckets),
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NULL },
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{ ngx_string("buffer"),
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NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_msec_slot,
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NGX_RTMP_APP_CONF_OFFSET,
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offsetof(ngx_rtmp_live_app_conf_t, buflen),
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NULL },
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ngx_null_command
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};
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static ngx_rtmp_module_t ngx_rtmp_live_module_ctx = {
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NULL, /* preconfiguration */
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ngx_rtmp_live_postconfiguration, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_rtmp_live_create_app_conf, /* create app configuration */
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ngx_rtmp_live_merge_app_conf /* merge app configuration */
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};
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ngx_module_t ngx_rtmp_live_module = {
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NGX_MODULE_V1,
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&ngx_rtmp_live_module_ctx, /* module context */
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ngx_rtmp_live_commands, /* module directives */
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NGX_RTMP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static void *
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ngx_rtmp_live_create_app_conf(ngx_conf_t *cf)
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{
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ngx_rtmp_live_app_conf_t *lacf;
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lacf = ngx_pcalloc(cf->pool, sizeof(ngx_rtmp_live_app_conf_t));
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if (lacf == NULL) {
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return NULL;
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}
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lacf->live = NGX_CONF_UNSET;
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lacf->meta = NGX_CONF_UNSET;
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lacf->nbuckets = NGX_CONF_UNSET;
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lacf->buflen = NGX_CONF_UNSET;
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return lacf;
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}
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static char *
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ngx_rtmp_live_merge_app_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_rtmp_live_app_conf_t *prev = parent;
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ngx_rtmp_live_app_conf_t *conf = child;
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ngx_conf_merge_value(conf->live, prev->live, 0);
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ngx_conf_merge_value(conf->meta, prev->meta, 1);
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ngx_conf_merge_value(conf->nbuckets, prev->nbuckets, 1024);
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ngx_conf_merge_msec_value(conf->buflen, prev->buflen, 0);
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conf->pool = ngx_create_pool(4096, &cf->cycle->new_log);
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if (conf->pool == NULL) {
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return NGX_CONF_ERROR;
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}
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conf->streams = ngx_pcalloc(cf->pool,
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sizeof(ngx_rtmp_live_stream_t *) * conf->nbuckets);
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return NGX_CONF_OK;
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}
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static ngx_rtmp_live_stream_t **
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ngx_rtmp_live_get_stream(ngx_rtmp_session_t *s, u_char *name, int create)
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{
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ngx_rtmp_live_app_conf_t *lacf;
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ngx_rtmp_live_stream_t **stream;
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size_t len;
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lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
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if (lacf == NULL) {
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return NULL;
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}
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len = ngx_strlen(name);
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stream = &lacf->streams[ngx_hash_key(name, len) % lacf->nbuckets];
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for (; *stream; stream = &(*stream)->next) {
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if (ngx_strcmp(name, (*stream)->name) == 0) {
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return stream;
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}
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}
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if (!create) {
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return NULL;
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}
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ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"live: create stream '%s'", name);
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if (lacf->free_streams) {
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*stream = lacf->free_streams;
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lacf->free_streams = lacf->free_streams->next;
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} else {
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*stream = ngx_palloc(lacf->pool, sizeof(ngx_rtmp_live_stream_t));
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}
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ngx_memzero(*stream, sizeof(ngx_rtmp_live_stream_t));
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ngx_memcpy((*stream)->name, name,
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ngx_min(sizeof((*stream)->name) - 1, len));
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(*stream)->epoch = ngx_current_msec;
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return stream;
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}
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static void
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ngx_rtmp_live_join(ngx_rtmp_session_t *s, u_char *name,
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ngx_uint_t flags)
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{
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ngx_rtmp_live_ctx_t *ctx;
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ngx_rtmp_live_stream_t **stream;
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ngx_rtmp_live_app_conf_t *lacf;
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lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
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if (lacf == NULL) {
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return;
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}
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
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if (ctx == NULL) {
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ctx = ngx_pcalloc(s->connection->pool, sizeof(ngx_rtmp_live_ctx_t));
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ctx->session = s;
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ngx_rtmp_set_ctx(s, ctx, ngx_rtmp_live_module);
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}
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if (ctx->stream) {
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ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log,
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0, "live: already joined");
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return;
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}
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ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"live: join '%s'", name);
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stream = ngx_rtmp_live_get_stream(s, name, 1);
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if (stream == NULL) {
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return;
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}
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if (flags & NGX_RTMP_LIVE_PUBLISHING) {
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if ((*stream)->flags & NGX_RTMP_LIVE_PUBLISHING) {
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ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
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"live: already publishing");
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return;
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}
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(*stream)->flags |= NGX_RTMP_LIVE_PUBLISHING;
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}
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ctx->stream = *stream;
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ctx->flags = flags;
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ctx->next = (*stream)->ctx;
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(*stream)->ctx = ctx;
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if (lacf->buflen) {
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s->out_buffer = 1;
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}
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}
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static ngx_int_t
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ngx_rtmp_live_close_stream(ngx_rtmp_session_t *s, ngx_rtmp_close_stream_t *v)
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{
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ngx_rtmp_live_ctx_t *ctx, **cctx;
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ngx_rtmp_live_stream_t **stream;
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ngx_rtmp_live_app_conf_t *lacf;
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lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
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if (lacf == NULL) {
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goto next;
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}
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
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if (ctx == NULL) {
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goto next;
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}
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if (ctx->stream == NULL) {
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ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"live: not joined ");
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goto next;
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}
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ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"live: leave '%s'", ctx->stream->name);
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ctx->msg_mask = 0;
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if (ctx->stream->flags & NGX_RTMP_LIVE_PUBLISHING
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&& ctx->flags & NGX_RTMP_LIVE_PUBLISHING)
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{
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ctx->stream->flags &= ~NGX_RTMP_LIVE_PUBLISHING;
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}
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for (cctx = &ctx->stream->ctx; *cctx; cctx = &(*cctx)->next) {
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if (*cctx == ctx) {
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*cctx = ctx->next;
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break;
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}
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}
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if (ctx->stream->ctx) {
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ctx->stream = NULL;
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goto next;
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}
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ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"live: delete empty stream '%s'", ctx->stream->name);
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stream = ngx_rtmp_live_get_stream(s, ctx->stream->name, 0);
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if (stream == NULL) {
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return NGX_ERROR;
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}
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*stream = (*stream)->next;
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ctx->stream->next = lacf->free_streams;
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lacf->free_streams = ctx->stream;
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ctx->stream = NULL;
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next:
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return next_close_stream(s, v);
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}
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static ngx_int_t
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ngx_rtmp_live_av(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
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ngx_chain_t *in)
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{
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ngx_rtmp_live_ctx_t *ctx, *pctx;
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ngx_rtmp_codec_ctx_t *codec_ctx;
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ngx_chain_t *out, *peer_out, *header_out,
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*pheader_out, *meta;
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ngx_rtmp_core_srv_conf_t *cscf;
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ngx_rtmp_live_app_conf_t *lacf;
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ngx_rtmp_session_t *ss;
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ngx_rtmp_header_t ch, lh;
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ngx_uint_t prio, peer_prio;
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ngx_uint_t peers, dropped_peers;
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size_t header_offset;
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ngx_uint_t header_version, meta_version;
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lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
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if (lacf == NULL) {
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ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"live: NULL application");
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return NGX_ERROR;
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}
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
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if (!lacf->live
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|| in == NULL || in->buf == NULL
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|| ctx == NULL || ctx->stream == NULL
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|| (h->type != NGX_RTMP_MSG_VIDEO
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&& h->type != NGX_RTMP_MSG_AUDIO))
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{
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return NGX_OK;
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}
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if ((ctx->flags & NGX_RTMP_LIVE_PUBLISHING) == 0) {
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ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"live: received audio/video from non-publisher");
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return NGX_OK;
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}
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ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"live: av: %s timestamp=%uD",
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h->type == NGX_RTMP_MSG_VIDEO ? "video" : "audio",
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h->timestamp);
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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/* prepare output header */
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ngx_memzero(&ch, sizeof(ch));
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ngx_memzero(&lh, sizeof(lh));
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ch.timestamp = h->timestamp;
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ch.msid = NGX_RTMP_LIVE_MSID;
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ch.type = h->type;
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lh.msid = ch.msid;
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if (h->type == NGX_RTMP_MSG_VIDEO) {
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prio = ngx_rtmp_get_video_frame_type(in);
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ch.csid = NGX_RTMP_LIVE_CSID_VIDEO;
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lh.timestamp = ctx->last_video;
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ctx->last_video = ch.timestamp;
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} else {
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/* audio priority is the same as video key frame's */
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prio = NGX_RTMP_VIDEO_KEY_FRAME;
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ch.csid = NGX_RTMP_LIVE_CSID_AUDIO;
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lh.timestamp = ctx->last_audio;
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ctx->last_audio = ch.timestamp;
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}
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lh.csid = ch.csid;
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out = ngx_rtmp_append_shared_bufs(cscf, NULL, in);
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ngx_rtmp_prepare_message(s, &ch, &lh, out);
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peers = 0;
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dropped_peers = 0;
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codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
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header_out = NULL;
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pheader_out = NULL;
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header_offset = 0;
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header_version = 0;
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meta = NULL;
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meta_version = 0;
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if (codec_ctx) {
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if (h->type == NGX_RTMP_MSG_AUDIO) {
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if (codec_ctx->aac_pheader) {
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header_out = codec_ctx->aac_header;
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pheader_out = codec_ctx->aac_pheader;
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header_offset = offsetof(ngx_rtmp_live_ctx_t, aac_version);
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header_version = codec_ctx->aac_version;
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}
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} else {
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if (codec_ctx->avc_pheader) {
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header_out = codec_ctx->avc_header;
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pheader_out = codec_ctx->avc_pheader;
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header_offset = offsetof(ngx_rtmp_live_ctx_t, avc_version);
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header_version = codec_ctx->avc_version;
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}
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}
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if (lacf->meta && codec_ctx->meta) {
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meta = codec_ctx->meta;
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meta_version = codec_ctx->meta_version;
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}
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}
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/* broadcast to all subscribers */
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for (pctx = ctx->stream->ctx; pctx; pctx = pctx->next) {
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if (pctx == ctx) {
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continue;
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}
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++peers;
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ss = pctx->session;
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/* send absolute frame */
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if ((pctx->msg_mask & (1 << h->type)) == 0) {
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ch.timestamp = ngx_current_msec - ss->epoch;
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ngx_log_debug2(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
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"live: av: abs %s timestamp=%uD",
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h->type == NGX_RTMP_MSG_VIDEO ? "video" : "audio",
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ch.timestamp);
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/* send codec header as abs frame if any */
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peer_out = ngx_rtmp_append_shared_bufs(cscf, NULL,
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header_out ? header_out : in);
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ngx_rtmp_prepare_message(s, &ch, NULL, peer_out);
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pctx->msg_mask |= (1 << h->type);
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if (ngx_rtmp_send_message(ss, peer_out, prio) == NGX_OK
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&& header_out)
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{
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*(ngx_uint_t *)((u_char *)pctx + header_offset)
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= header_version;
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}
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ngx_rtmp_free_shared_chain(cscf, peer_out);
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continue;
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}
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/* send AVC/H264 header if newer header has arrived */
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if (pheader_out && *(ngx_uint_t *)((u_char *)pctx + header_offset)
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!= header_version)
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{
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ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
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"live: sending codec header");
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if (ngx_rtmp_send_message(ss, pheader_out, prio) == NGX_OK) {
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*(ngx_uint_t *)((u_char *)pctx + header_offset)
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= header_version;
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}
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}
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/* send metadata if newer exists */
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if (meta && meta_version != pctx->meta_version) {
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ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
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"live: sending metadata");
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if (ngx_rtmp_send_message(ss, meta, prio) == NGX_OK) {
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pctx->meta_version = meta_version;
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}
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}
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/* push buffered data */
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peer_prio = prio;
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if (ngx_rtmp_send_message(ss, out, peer_prio) != NGX_OK) {
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++pctx->dropped;
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++dropped_peers;
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}
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}
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ngx_rtmp_free_shared_chain(cscf, out);
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ngx_rtmp_update_bandwidth(&ctx->stream->bw_in, h->mlen);
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ngx_rtmp_update_bandwidth(&ctx->stream->bw_out,
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h->mlen * (peers - dropped_peers));
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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_live_publish(ngx_rtmp_session_t *s, ngx_rtmp_publish_t *v)
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{
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ngx_rtmp_live_app_conf_t *lacf;
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lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
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if (lacf == NULL || !lacf->live) {
|
|
goto next;
|
|
}
|
|
|
|
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
|
|
"live: publish: name='%s' type='%s'",
|
|
v->name, v->type);
|
|
|
|
/* join stream as publisher */
|
|
ngx_rtmp_live_join(s, v->name, NGX_RTMP_LIVE_PUBLISHING);
|
|
|
|
next:
|
|
return next_publish(s, v);
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_live_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
|
|
{
|
|
ngx_rtmp_live_app_conf_t *lacf;
|
|
|
|
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
|
|
|
|
if (lacf == NULL || !lacf->live) {
|
|
goto next;
|
|
}
|
|
|
|
ngx_log_debug4(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
|
|
"live: play: name='%s' start=%uD duration=%uD reset=%d",
|
|
v->name, (uint32_t)v->start,
|
|
(uint32_t)v->duration, (uint32_t)v->reset);
|
|
|
|
/* join stream as player */
|
|
ngx_rtmp_live_join(s, v->name, 0);
|
|
|
|
next:
|
|
return next_play(s, v);
|
|
}
|
|
|
|
|
|
static ngx_int_t
|
|
ngx_rtmp_live_postconfiguration(ngx_conf_t *cf)
|
|
{
|
|
ngx_rtmp_core_main_conf_t *cmcf;
|
|
ngx_rtmp_handler_pt *h;
|
|
|
|
cmcf = ngx_rtmp_conf_get_module_main_conf(cf, ngx_rtmp_core_module);
|
|
|
|
/* register raw event handlers */
|
|
h = ngx_array_push(&cmcf->events[NGX_RTMP_MSG_AUDIO]);
|
|
*h = ngx_rtmp_live_av;
|
|
|
|
h = ngx_array_push(&cmcf->events[NGX_RTMP_MSG_VIDEO]);
|
|
*h = ngx_rtmp_live_av;
|
|
|
|
/* chain handlers */
|
|
next_publish = ngx_rtmp_publish;
|
|
ngx_rtmp_publish = ngx_rtmp_live_publish;
|
|
|
|
next_play = ngx_rtmp_play;
|
|
ngx_rtmp_play = ngx_rtmp_live_play;
|
|
|
|
next_close_stream = ngx_rtmp_close_stream;
|
|
ngx_rtmp_close_stream = ngx_rtmp_live_close_stream;
|
|
|
|
return NGX_OK;
|
|
}
|