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SoftwareEngineering/直播工具包/nginx-rtmp-module-master/ngx_rtmp_live_module.c

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/*
* Copyright (C) Roman Arutyunyan
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include "ngx_rtmp_live_module.h"
#include "ngx_rtmp_cmd_module.h"
#include "ngx_rtmp_codec_module.h"
static ngx_rtmp_publish_pt next_publish;
static ngx_rtmp_play_pt next_play;
static ngx_rtmp_close_stream_pt next_close_stream;
static ngx_rtmp_pause_pt next_pause;
static ngx_rtmp_stream_begin_pt next_stream_begin;
static ngx_rtmp_stream_eof_pt next_stream_eof;
static ngx_int_t ngx_rtmp_live_postconfiguration(ngx_conf_t *cf);
static void * ngx_rtmp_live_create_app_conf(ngx_conf_t *cf);
static char * ngx_rtmp_live_merge_app_conf(ngx_conf_t *cf,
void *parent, void *child);
static char *ngx_rtmp_live_set_msec_slot(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static void ngx_rtmp_live_start(ngx_rtmp_session_t *s);
static void ngx_rtmp_live_stop(ngx_rtmp_session_t *s);
static ngx_command_t ngx_rtmp_live_commands[] = {
{ ngx_string("live"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, live),
NULL },
{ ngx_string("stream_buckets"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, nbuckets),
NULL },
{ ngx_string("buffer"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, buflen),
NULL },
{ ngx_string("sync"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_rtmp_live_set_msec_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, sync),
NULL },
{ ngx_string("interleave"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, interleave),
NULL },
{ ngx_string("wait_key"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, wait_key),
NULL },
{ ngx_string("wait_video"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, wait_video),
NULL },
{ ngx_string("publish_notify"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, publish_notify),
NULL },
{ ngx_string("play_restart"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, play_restart),
NULL },
{ ngx_string("idle_streams"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, idle_streams),
NULL },
{ ngx_string("drop_idle_publisher"),
NGX_RTMP_MAIN_CONF|NGX_RTMP_SRV_CONF|NGX_RTMP_APP_CONF|NGX_CONF_TAKE1,
ngx_rtmp_live_set_msec_slot,
NGX_RTMP_APP_CONF_OFFSET,
offsetof(ngx_rtmp_live_app_conf_t, idle_timeout),
NULL },
ngx_null_command
};
static ngx_rtmp_module_t ngx_rtmp_live_module_ctx = {
NULL, /* preconfiguration */
ngx_rtmp_live_postconfiguration, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_rtmp_live_create_app_conf, /* create app configuration */
ngx_rtmp_live_merge_app_conf /* merge app configuration */
};
ngx_module_t ngx_rtmp_live_module = {
NGX_MODULE_V1,
&ngx_rtmp_live_module_ctx, /* module context */
ngx_rtmp_live_commands, /* module directives */
NGX_RTMP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static void *
ngx_rtmp_live_create_app_conf(ngx_conf_t *cf)
{
ngx_rtmp_live_app_conf_t *lacf;
lacf = ngx_pcalloc(cf->pool, sizeof(ngx_rtmp_live_app_conf_t));
if (lacf == NULL) {
return NULL;
}
lacf->live = NGX_CONF_UNSET;
lacf->nbuckets = NGX_CONF_UNSET;
lacf->buflen = NGX_CONF_UNSET_MSEC;
lacf->sync = NGX_CONF_UNSET_MSEC;
lacf->idle_timeout = NGX_CONF_UNSET_MSEC;
lacf->interleave = NGX_CONF_UNSET;
lacf->wait_key = NGX_CONF_UNSET;
lacf->wait_video = NGX_CONF_UNSET;
lacf->publish_notify = NGX_CONF_UNSET;
lacf->play_restart = NGX_CONF_UNSET;
lacf->idle_streams = NGX_CONF_UNSET;
return lacf;
}
static char *
ngx_rtmp_live_merge_app_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_rtmp_live_app_conf_t *prev = parent;
ngx_rtmp_live_app_conf_t *conf = child;
ngx_conf_merge_value(conf->live, prev->live, 0);
ngx_conf_merge_value(conf->nbuckets, prev->nbuckets, 1024);
ngx_conf_merge_msec_value(conf->buflen, prev->buflen, 0);
ngx_conf_merge_msec_value(conf->sync, prev->sync, 300);
ngx_conf_merge_msec_value(conf->idle_timeout, prev->idle_timeout, 0);
ngx_conf_merge_value(conf->interleave, prev->interleave, 0);
ngx_conf_merge_value(conf->wait_key, prev->wait_key, 1);
ngx_conf_merge_value(conf->wait_video, prev->wait_video, 0);
ngx_conf_merge_value(conf->publish_notify, prev->publish_notify, 0);
ngx_conf_merge_value(conf->play_restart, prev->play_restart, 0);
ngx_conf_merge_value(conf->idle_streams, prev->idle_streams, 1);
conf->pool = ngx_create_pool(4096, &cf->cycle->new_log);
if (conf->pool == NULL) {
return NGX_CONF_ERROR;
}
conf->streams = ngx_pcalloc(cf->pool,
sizeof(ngx_rtmp_live_stream_t *) * conf->nbuckets);
return NGX_CONF_OK;
}
static char *
ngx_rtmp_live_set_msec_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
char *p = conf;
ngx_str_t *value;
ngx_msec_t *msp;
msp = (ngx_msec_t *) (p + cmd->offset);
value = cf->args->elts;
if (value[1].len == sizeof("off") - 1 &&
ngx_strncasecmp(value[1].data, (u_char *) "off", value[1].len) == 0)
{
*msp = 0;
return NGX_CONF_OK;
}
return ngx_conf_set_msec_slot(cf, cmd, conf);
}
static ngx_rtmp_live_stream_t **
ngx_rtmp_live_get_stream(ngx_rtmp_session_t *s, u_char *name, int create)
{
ngx_rtmp_live_app_conf_t *lacf;
ngx_rtmp_live_stream_t **stream;
size_t len;
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
if (lacf == NULL) {
return NULL;
}
len = ngx_strlen(name);
stream = &lacf->streams[ngx_hash_key(name, len) % lacf->nbuckets];
for (; *stream; stream = &(*stream)->next) {
if (ngx_strcmp(name, (*stream)->name) == 0) {
return stream;
}
}
if (!create) {
return NULL;
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: create stream '%s'", name);
if (lacf->free_streams) {
*stream = lacf->free_streams;
lacf->free_streams = lacf->free_streams->next;
} else {
*stream = ngx_palloc(lacf->pool, sizeof(ngx_rtmp_live_stream_t));
}
ngx_memzero(*stream, sizeof(ngx_rtmp_live_stream_t));
ngx_memcpy((*stream)->name, name,
ngx_min(sizeof((*stream)->name) - 1, len));
(*stream)->epoch = ngx_current_msec;
return stream;
}
static void
ngx_rtmp_live_idle(ngx_event_t *pev)
{
ngx_connection_t *c;
ngx_rtmp_session_t *s;
c = pev->data;
s = c->data;
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"live: drop idle publisher");
ngx_rtmp_finalize_session(s);
}
static void
ngx_rtmp_live_set_status(ngx_rtmp_session_t *s, ngx_chain_t *control,
ngx_chain_t **status, size_t nstatus,
unsigned active)
{
ngx_rtmp_live_app_conf_t *lacf;
ngx_rtmp_live_ctx_t *ctx, *pctx;
ngx_chain_t **cl;
ngx_event_t *e;
size_t n;
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: set active=%ui", active);
if (ctx->active == active) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: unchanged active=%ui", active);
return;
}
ctx->active = active;
if (ctx->publishing) {
/* publisher */
if (lacf->idle_timeout) {
e = &ctx->idle_evt;
if (active && !ctx->idle_evt.timer_set) {
e->data = s->connection;
e->log = s->connection->log;
e->handler = ngx_rtmp_live_idle;
ngx_add_timer(e, lacf->idle_timeout);
} else if (!active && ctx->idle_evt.timer_set) {
ngx_del_timer(e);
}
}
ctx->stream->active = active;
for (pctx = ctx->stream->ctx; pctx; pctx = pctx->next) {
if (pctx->publishing == 0) {
ngx_rtmp_live_set_status(pctx->session, control, status,
nstatus, active);
}
}
return;
}
/* subscriber */
if (control && ngx_rtmp_send_message(s, control, 0) != NGX_OK) {
ngx_rtmp_finalize_session(s);
return;
}
if (!ctx->silent) {
cl = status;
for (n = 0; n < nstatus; ++n, ++cl) {
if (*cl && ngx_rtmp_send_message(s, *cl, 0) != NGX_OK) {
ngx_rtmp_finalize_session(s);
return;
}
}
}
ctx->cs[0].active = 0;
ctx->cs[0].dropped = 0;
ctx->cs[1].active = 0;
ctx->cs[1].dropped = 0;
}
static void
ngx_rtmp_live_start(ngx_rtmp_session_t *s)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_live_app_conf_t *lacf;
ngx_chain_t *control;
ngx_chain_t *status[3];
size_t n, nstatus;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
control = ngx_rtmp_create_stream_begin(s, NGX_RTMP_MSID);
nstatus = 0;
if (lacf->play_restart) {
status[nstatus++] = ngx_rtmp_create_status(s, "NetStream.Play.Start",
"status", "Start live");
status[nstatus++] = ngx_rtmp_create_sample_access(s);
}
if (lacf->publish_notify) {
status[nstatus++] = ngx_rtmp_create_status(s,
"NetStream.Play.PublishNotify",
"status", "Start publishing");
}
ngx_rtmp_live_set_status(s, control, status, nstatus, 1);
if (control) {
ngx_rtmp_free_shared_chain(cscf, control);
}
for (n = 0; n < nstatus; ++n) {
ngx_rtmp_free_shared_chain(cscf, status[n]);
}
}
static void
ngx_rtmp_live_stop(ngx_rtmp_session_t *s)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_live_app_conf_t *lacf;
ngx_chain_t *control;
ngx_chain_t *status[3];
size_t n, nstatus;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
control = ngx_rtmp_create_stream_eof(s, NGX_RTMP_MSID);
nstatus = 0;
if (lacf->play_restart) {
status[nstatus++] = ngx_rtmp_create_status(s, "NetStream.Play.Stop",
"status", "Stop live");
}
if (lacf->publish_notify) {
status[nstatus++] = ngx_rtmp_create_status(s,
"NetStream.Play.UnpublishNotify",
"status", "Stop publishing");
}
ngx_rtmp_live_set_status(s, control, status, nstatus, 0);
if (control) {
ngx_rtmp_free_shared_chain(cscf, control);
}
for (n = 0; n < nstatus; ++n) {
ngx_rtmp_free_shared_chain(cscf, status[n]);
}
}
static ngx_int_t
ngx_rtmp_live_stream_begin(ngx_rtmp_session_t *s, ngx_rtmp_stream_begin_t *v)
{
ngx_rtmp_live_ctx_t *ctx;
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (ctx == NULL || ctx->stream == NULL || !ctx->publishing) {
goto next;
}
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: stream_begin");
ngx_rtmp_live_start(s);
next:
return next_stream_begin(s, v);
}
static ngx_int_t
ngx_rtmp_live_stream_eof(ngx_rtmp_session_t *s, ngx_rtmp_stream_eof_t *v)
{
ngx_rtmp_live_ctx_t *ctx;
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (ctx == NULL || ctx->stream == NULL || !ctx->publishing) {
goto next;
}
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: stream_eof");
ngx_rtmp_live_stop(s);
next:
return next_stream_eof(s, v);
}
static void
ngx_rtmp_live_join(ngx_rtmp_session_t *s, u_char *name, unsigned publisher)
{
ngx_rtmp_live_ctx_t *ctx;
ngx_rtmp_live_stream_t **stream;
ngx_rtmp_live_app_conf_t *lacf;
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
if (lacf == NULL) {
return;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (ctx && ctx->stream) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: already joined");
return;
}
if (ctx == NULL) {
ctx = ngx_palloc(s->connection->pool, sizeof(ngx_rtmp_live_ctx_t));
ngx_rtmp_set_ctx(s, ctx, ngx_rtmp_live_module);
}
ngx_memzero(ctx, sizeof(*ctx));
ctx->session = s;
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: join '%s'", name);
stream = ngx_rtmp_live_get_stream(s, name, publisher || lacf->idle_streams);
if (stream == NULL ||
!(publisher || (*stream)->publishing || lacf->idle_streams))
{
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"live: stream not found");
ngx_rtmp_send_status(s, "NetStream.Play.StreamNotFound", "error",
"No such stream");
ngx_rtmp_finalize_session(s);
return;
}
if (publisher) {
if ((*stream)->publishing) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"live: already publishing");
ngx_rtmp_send_status(s, "NetStream.Publish.BadName", "error",
"Already publishing");
return;
}
(*stream)->publishing = 1;
}
ctx->stream = *stream;
ctx->publishing = publisher;
ctx->next = (*stream)->ctx;
(*stream)->ctx = ctx;
if (lacf->buflen) {
s->out_buffer = 1;
}
ctx->cs[0].csid = NGX_RTMP_CSID_VIDEO;
ctx->cs[1].csid = NGX_RTMP_CSID_AUDIO;
if (!ctx->publishing && ctx->stream->active) {
ngx_rtmp_live_start(s);
}
}
static ngx_int_t
ngx_rtmp_live_close_stream(ngx_rtmp_session_t *s, ngx_rtmp_close_stream_t *v)
{
ngx_rtmp_session_t *ss;
ngx_rtmp_live_ctx_t *ctx, **cctx, *pctx;
ngx_rtmp_live_stream_t **stream;
ngx_rtmp_live_app_conf_t *lacf;
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
if (lacf == NULL) {
goto next;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (ctx == NULL) {
goto next;
}
if (ctx->stream == NULL) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: not joined");
goto next;
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: leave '%s'", ctx->stream->name);
if (ctx->stream->publishing && ctx->publishing) {
ctx->stream->publishing = 0;
}
for (cctx = &ctx->stream->ctx; *cctx; cctx = &(*cctx)->next) {
if (*cctx == ctx) {
*cctx = ctx->next;
break;
}
}
if (ctx->publishing || ctx->stream->active) {
ngx_rtmp_live_stop(s);
}
if (ctx->publishing) {
ngx_rtmp_send_status(s, "NetStream.Unpublish.Success",
"status", "Stop publishing");
if (!lacf->idle_streams) {
for (pctx = ctx->stream->ctx; pctx; pctx = pctx->next) {
if (pctx->publishing == 0) {
ss = pctx->session;
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: no publisher");
ngx_rtmp_finalize_session(ss);
}
}
}
}
if (ctx->stream->ctx) {
ctx->stream = NULL;
goto next;
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: delete empty stream '%s'",
ctx->stream->name);
stream = ngx_rtmp_live_get_stream(s, ctx->stream->name, 0);
if (stream == NULL) {
goto next;
}
*stream = (*stream)->next;
ctx->stream->next = lacf->free_streams;
lacf->free_streams = ctx->stream;
ctx->stream = NULL;
if (!ctx->silent && !ctx->publishing && !lacf->play_restart) {
ngx_rtmp_send_status(s, "NetStream.Play.Stop", "status", "Stop live");
}
next:
return next_close_stream(s, v);
}
static ngx_int_t
ngx_rtmp_live_pause(ngx_rtmp_session_t *s, ngx_rtmp_pause_t *v)
{
ngx_rtmp_live_ctx_t *ctx;
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (ctx == NULL || ctx->stream == NULL) {
goto next;
}
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: pause=%i timestamp=%f",
(ngx_int_t) v->pause, v->position);
if (v->pause) {
if (ngx_rtmp_send_status(s, "NetStream.Pause.Notify", "status",
"Paused live")
!= NGX_OK)
{
return NGX_ERROR;
}
ctx->paused = 1;
ngx_rtmp_live_stop(s);
} else {
if (ngx_rtmp_send_status(s, "NetStream.Unpause.Notify", "status",
"Unpaused live")
!= NGX_OK)
{
return NGX_ERROR;
}
ctx->paused = 0;
ngx_rtmp_live_start(s);
}
next:
return next_pause(s, v);
}
static ngx_int_t
ngx_rtmp_live_av(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
ngx_chain_t *in)
{
ngx_rtmp_live_ctx_t *ctx, *pctx;
ngx_rtmp_codec_ctx_t *codec_ctx;
ngx_chain_t *header, *coheader, *meta,
*apkt, *aapkt, *acopkt, *rpkt;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_live_app_conf_t *lacf;
ngx_rtmp_session_t *ss;
ngx_rtmp_header_t ch, lh, clh;
ngx_int_t rc, mandatory, dummy_audio;
ngx_uint_t prio;
ngx_uint_t peers;
ngx_uint_t meta_version;
ngx_uint_t csidx;
uint32_t delta;
ngx_rtmp_live_chunk_stream_t *cs;
#ifdef NGX_DEBUG
const char *type_s;
type_s = (h->type == NGX_RTMP_MSG_VIDEO ? "video" : "audio");
#endif
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
if (lacf == NULL) {
return NGX_ERROR;
}
if (!lacf->live || in == NULL || in->buf == NULL) {
return NGX_OK;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (ctx == NULL || ctx->stream == NULL) {
return NGX_OK;
}
if (ctx->publishing == 0) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: %s from non-publisher", type_s);
return NGX_OK;
}
if (!ctx->stream->active) {
ngx_rtmp_live_start(s);
}
if (ctx->idle_evt.timer_set) {
ngx_add_timer(&ctx->idle_evt, lacf->idle_timeout);
}
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: %s packet timestamp=%uD",
type_s, h->timestamp);
s->current_time = h->timestamp;
peers = 0;
apkt = NULL;
aapkt = NULL;
acopkt = NULL;
header = NULL;
coheader = NULL;
meta = NULL;
meta_version = 0;
mandatory = 0;
prio = (h->type == NGX_RTMP_MSG_VIDEO ?
ngx_rtmp_get_video_frame_type(in) : 0);
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
csidx = !(lacf->interleave || h->type == NGX_RTMP_MSG_VIDEO);
cs = &ctx->cs[csidx];
ngx_memzero(&ch, sizeof(ch));
ch.timestamp = h->timestamp;
ch.msid = NGX_RTMP_MSID;
ch.csid = cs->csid;
ch.type = h->type;
lh = ch;
if (cs->active) {
lh.timestamp = cs->timestamp;
}
clh = lh;
clh.type = (h->type == NGX_RTMP_MSG_AUDIO ? NGX_RTMP_MSG_VIDEO :
NGX_RTMP_MSG_AUDIO);
cs->active = 1;
cs->timestamp = ch.timestamp;
delta = ch.timestamp - lh.timestamp;
/*
if (delta >> 31) {
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: clipping non-monotonical timestamp %uD->%uD",
lh.timestamp, ch.timestamp);
delta = 0;
ch.timestamp = lh.timestamp;
}
*/
rpkt = ngx_rtmp_append_shared_bufs(cscf, NULL, in);
ngx_rtmp_prepare_message(s, &ch, &lh, rpkt);
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
if (codec_ctx) {
if (h->type == NGX_RTMP_MSG_AUDIO) {
header = codec_ctx->aac_header;
if (lacf->interleave) {
coheader = codec_ctx->avc_header;
}
if (codec_ctx->audio_codec_id == NGX_RTMP_AUDIO_AAC &&
ngx_rtmp_is_codec_header(in))
{
prio = 0;
mandatory = 1;
}
} else {
header = codec_ctx->avc_header;
if (lacf->interleave) {
coheader = codec_ctx->aac_header;
}
if (codec_ctx->video_codec_id == NGX_RTMP_VIDEO_H264 &&
ngx_rtmp_is_codec_header(in))
{
prio = 0;
mandatory = 1;
}
}
if (codec_ctx->meta) {
meta = codec_ctx->meta;
meta_version = codec_ctx->meta_version;
}
}
/* broadcast to all subscribers */
for (pctx = ctx->stream->ctx; pctx; pctx = pctx->next) {
if (pctx == ctx || pctx->paused) {
continue;
}
ss = pctx->session;
cs = &pctx->cs[csidx];
/* send metadata */
if (meta && meta_version != pctx->meta_version) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: meta");
if (ngx_rtmp_send_message(ss, meta, 0) == NGX_OK) {
pctx->meta_version = meta_version;
}
}
/* sync stream */
if (cs->active && (lacf->sync && cs->dropped > lacf->sync)) {
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: sync %s dropped=%uD", type_s, cs->dropped);
cs->active = 0;
cs->dropped = 0;
}
/* absolute packet */
if (!cs->active) {
if (mandatory) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: skipping header");
continue;
}
if (lacf->wait_video && h->type == NGX_RTMP_MSG_AUDIO &&
!pctx->cs[0].active)
{
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: waiting for video");
continue;
}
if (lacf->wait_key && prio != NGX_RTMP_VIDEO_KEY_FRAME &&
(lacf->interleave || h->type == NGX_RTMP_MSG_VIDEO))
{
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: skip non-key");
continue;
}
dummy_audio = 0;
if (lacf->wait_video && h->type == NGX_RTMP_MSG_VIDEO &&
!pctx->cs[1].active)
{
dummy_audio = 1;
if (aapkt == NULL) {
aapkt = ngx_rtmp_alloc_shared_buf(cscf);
ngx_rtmp_prepare_message(s, &clh, NULL, aapkt);
}
}
if (header || coheader) {
/* send absolute codec header */
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: abs %s header timestamp=%uD",
type_s, lh.timestamp);
if (header) {
if (apkt == NULL) {
apkt = ngx_rtmp_append_shared_bufs(cscf, NULL, header);
ngx_rtmp_prepare_message(s, &lh, NULL, apkt);
}
rc = ngx_rtmp_send_message(ss, apkt, 0);
if (rc != NGX_OK) {
continue;
}
}
if (coheader) {
if (acopkt == NULL) {
acopkt = ngx_rtmp_append_shared_bufs(cscf, NULL, coheader);
ngx_rtmp_prepare_message(s, &clh, NULL, acopkt);
}
rc = ngx_rtmp_send_message(ss, acopkt, 0);
if (rc != NGX_OK) {
continue;
}
} else if (dummy_audio) {
ngx_rtmp_send_message(ss, aapkt, 0);
}
cs->timestamp = lh.timestamp;
cs->active = 1;
ss->current_time = cs->timestamp;
} else {
/* send absolute packet */
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: abs %s packet timestamp=%uD",
type_s, ch.timestamp);
if (apkt == NULL) {
apkt = ngx_rtmp_append_shared_bufs(cscf, NULL, in);
ngx_rtmp_prepare_message(s, &ch, NULL, apkt);
}
rc = ngx_rtmp_send_message(ss, apkt, prio);
if (rc != NGX_OK) {
continue;
}
cs->timestamp = ch.timestamp;
cs->active = 1;
ss->current_time = cs->timestamp;
++peers;
if (dummy_audio) {
ngx_rtmp_send_message(ss, aapkt, 0);
}
continue;
}
}
/* send relative packet */
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: rel %s packet delta=%uD",
type_s, delta);
if (ngx_rtmp_send_message(ss, rpkt, prio) != NGX_OK) {
++pctx->ndropped;
cs->dropped += delta;
if (mandatory) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: mandatory packet failed");
ngx_rtmp_finalize_session(ss);
}
continue;
}
cs->timestamp += delta;
++peers;
ss->current_time = cs->timestamp;
}
if (rpkt) {
ngx_rtmp_free_shared_chain(cscf, rpkt);
}
if (apkt) {
ngx_rtmp_free_shared_chain(cscf, apkt);
}
if (aapkt) {
ngx_rtmp_free_shared_chain(cscf, aapkt);
}
if (acopkt) {
ngx_rtmp_free_shared_chain(cscf, acopkt);
}
ngx_rtmp_update_bandwidth(&ctx->stream->bw_in, h->mlen);
ngx_rtmp_update_bandwidth(&ctx->stream->bw_out, h->mlen * peers);
ngx_rtmp_update_bandwidth(h->type == NGX_RTMP_MSG_AUDIO ?
&ctx->stream->bw_in_audio :
&ctx->stream->bw_in_video,
h->mlen);
return NGX_OK;
}
static ngx_int_t
ngx_rtmp_live_publish(ngx_rtmp_session_t *s, ngx_rtmp_publish_t *v)
{
ngx_rtmp_live_app_conf_t *lacf;
ngx_rtmp_live_ctx_t *ctx;
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
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, 1);
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (ctx == NULL || !ctx->publishing) {
goto next;
}
ctx->silent = v->silent;
if (!ctx->silent) {
ngx_rtmp_send_status(s, "NetStream.Publish.Start",
"status", "Start 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;
ngx_rtmp_live_ctx_t *ctx;
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 subscriber */
ngx_rtmp_live_join(s, v->name, 0);
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (ctx == NULL) {
goto next;
}
ctx->silent = v->silent;
if (!ctx->silent && !lacf->play_restart) {
ngx_rtmp_send_status(s, "NetStream.Play.Start",
"status", "Start live");
ngx_rtmp_send_sample_access(s);
}
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;
next_pause = ngx_rtmp_pause;
ngx_rtmp_pause = ngx_rtmp_live_pause;
next_stream_begin = ngx_rtmp_stream_begin;
ngx_rtmp_stream_begin = ngx_rtmp_live_stream_begin;
next_stream_eof = ngx_rtmp_stream_eof;
ngx_rtmp_stream_eof = ngx_rtmp_live_stream_eof;
return NGX_OK;
}