static ngx_int_t
ngx_rtmp_notify_disconnect(ngx_rtmp_session_t *s)
{
ngx_rtmp_notify_srv_conf_t *nscf;
ngx_rtmp_netcall_init_t ci;
ngx_url_t *url;
if (s->auto_pushed || s->relay) {
goto next;
}
nscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_notify_module);
url = nscf->url[NGX_RTMP_NOTIFY_DISCONNECT];
if (url == NULL) {
goto next;
}
ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
"notify: disconnect '%V'", &url->url);
ngx_memzero(&ci, sizeof(ci));
ci.url = url;
ci.create = ngx_rtmp_notify_disconnect_create;
ngx_rtmp_netcall_create(s, &ci);
next:
return next_disconnect(s);
}
ngx_chain_t *
ngx_rtmp_create_amf(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
ngx_rtmp_amf_elt_t *elts, size_t nelts)
{
ngx_chain_t *first;
ngx_int_t rc;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"create: amf nelts=%ui", nelts);
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
first = NULL;
rc = ngx_rtmp_append_amf(s, &first, NULL, elts, nelts);
if (rc != NGX_OK && first) {
ngx_rtmp_free_shared_chain(cscf, first);
first = NULL;
}
if (first) {
ngx_rtmp_prepare_message(s, h, NULL, first);
}
return first;
}
static ngx_int_t
ngx_rtmp_codec_disconnect(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
ngx_chain_t *in)
{
ngx_rtmp_codec_ctx_t *ctx;
ngx_rtmp_core_srv_conf_t *cscf;
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
if (ctx == NULL) {
return NGX_OK;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
if (ctx->avc_header) {
ngx_rtmp_free_shared_chain(cscf, ctx->avc_header);
ctx->avc_header = NULL;
}
if (ctx->aac_header) {
ngx_rtmp_free_shared_chain(cscf, ctx->aac_header);
ctx->aac_header = NULL;
}
if (ctx->meta) {
ngx_rtmp_free_shared_chain(cscf, ctx->meta);
ctx->meta = NULL;
}
return NGX_OK;
}
static ngx_buf_t *
ngx_rtmp_alloc_handshake_buffer(ngx_rtmp_session_t *s)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_chain_t *cl;
ngx_buf_t *b;
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"handshake: allocating buffer");
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
if (cscf->free_hs) {
cl = cscf->free_hs;
b = cl->buf;
cscf->free_hs = cl->next;
ngx_free_chain(cscf->pool, cl);
} else {
b = ngx_pcalloc(cscf->pool, sizeof(ngx_buf_t));
if (b == NULL) {
return NULL;
}
b->memory = 1;
b->start = ngx_pcalloc(cscf->pool, NGX_RTMP_HANDSHAKE_BUFSIZE);
if (b->start == NULL) {
return NULL;
}
b->end = b->start + NGX_RTMP_HANDSHAKE_BUFSIZE;
}
b->pos = b->last = b->start;
return b;
}
ngx_int_t
ngx_rtmp_send_amf(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
ngx_rtmp_amf_elt_t *elts, size_t nelts)
{
ngx_chain_t *first;
ngx_int_t rc;
ngx_rtmp_core_srv_conf_t *cscf;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
first = NULL;
rc = ngx_rtmp_append_amf(s, &first, NULL, elts, nelts);
if (rc != NGX_OK || first == NULL) {
goto done;
}
ngx_rtmp_prepare_message(s, h, NULL, first);
rc = ngx_rtmp_send_message(s, first, 0);
done:
ngx_rtmp_free_shared_chain(cscf, first);
return rc;
}
static ngx_chain_t *
ngx_rtmp_notify_disconnect_create(ngx_rtmp_session_t *s, void *arg,
ngx_pool_t *pool)
{
ngx_rtmp_notify_srv_conf_t *nscf;
ngx_url_t *url;
ngx_chain_t *al, *bl, *pl;
ngx_buf_t *b;
nscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_notify_module);
pl = ngx_alloc_chain_link(pool);
if (pl == NULL) {
return NULL;
}
b = ngx_create_temp_buf(pool,
sizeof("&call=disconnect") +
sizeof("&app=") + s->app.len * 3 +
1 + s->args.len);
if (b == NULL) {
return NULL;
}
pl->buf = b;
pl->next = NULL;
b->last = ngx_cpymem(b->last, (u_char*) "&call=disconnect",
sizeof("&call=disconnect") - 1);
b->last = ngx_cpymem(b->last, (u_char*) "&app=", sizeof("&app=") - 1);
b->last = (u_char*) ngx_escape_uri(b->last, s->app.data, s->app.len,
NGX_ESCAPE_ARGS);
if (s->args.len) {
*b->last++ = '&';
b->last = (u_char *) ngx_cpymem(b->last, s->args.data, s->args.len);
}
url = nscf->url[NGX_RTMP_NOTIFY_DISCONNECT];
al = ngx_rtmp_netcall_http_format_session(s, pool);
if (al == NULL) {
return NULL;
}
al->next = pl;
bl = NULL;
if (nscf->method == NGX_RTMP_NETCALL_HTTP_POST) {
bl = al;
al = NULL;
}
return ngx_rtmp_netcall_http_format_request(nscf->method, &url->host,
&url->uri, al, bl, pool,
&ngx_rtmp_notify_urlencoded);
}
static ngx_int_t
ngx_rtmp_send_shared_packet(ngx_rtmp_session_t *s, ngx_chain_t *cl)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_int_t rc;
if (cl == NULL) {
return NGX_ERROR;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
rc = ngx_rtmp_send_message(s, cl, 0);
ngx_rtmp_free_shared_chain(cscf, cl);
return rc;
}
void
ngx_rtmp_ssl_handshake(ngx_rtmp_session_t *s)
{
ngx_connection_t *c;
ngx_rtmp_ssl_srv_conf_t *sscf;
c = s->connection;
sscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_ssl_module);
if (ngx_ssl_create_connection(&sscf->ssl, c, 0) != NGX_OK)
{
ngx_rtmp_finalize_session(s);
return;
}
ngx_rtmp_ssl_handshake_handler(c);
return;
}
void
ngx_rtmp_free_handshake_buffers(ngx_rtmp_session_t *s)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_chain_t *cl;
if (s->hs_buf == NULL) {
return;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
cl = ngx_alloc_chain_link(cscf->pool);
if (cl == NULL) {
return;
}
cl->buf = s->hs_buf;
cl->next = cscf->free_hs;
cscf->free_hs = cl;
s->hs_buf = NULL;
}
static ngx_int_t
ngx_rtmp_codec_disconnect(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
ngx_chain_t *in)
{
ngx_rtmp_codec_ctx_t *ctx;
ngx_rtmp_core_srv_conf_t *cscf;
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
if (ctx == NULL) {
return NGX_OK;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
if (ctx->avc_header) {
ngx_rtmp_free_shared_chain(cscf, ctx->avc_header);
ctx->avc_header = NULL;
}
if (ctx->aac_header) {
ngx_rtmp_free_shared_chain(cscf, ctx->aac_header);
ctx->aac_header = NULL;
}
if (ctx->store_key_size) {
ngx_uint_t i;
for (i = 0; i < ctx->store_key_size; i++)
{
if (ctx->storeframes[i])
{
ngx_rtmp_free_shared_chain(cscf, ctx->storeframes[i]);
ctx->storeframes[i] = NULL;
}
}
}
if (ctx->meta) {
ngx_rtmp_free_shared_chain(cscf, ctx->meta);
ctx->meta = NULL;
}
return NGX_OK;
}
/*
启动发布或播放
*/
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);
/* 控制报文 */
control = ngx_rtmp_create_stream_begin(s, NGX_RTMP_MSID);
nstatus = 0; /* status报文个数 */
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_close_session_handler(ngx_event_t *e)
{
ngx_rtmp_session_t *s;
ngx_connection_t *c;
ngx_rtmp_core_srv_conf_t *cscf;
s = e->data;
c = s->connection;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, c->log, 0, "close session");
if (s) {
ngx_rtmp_fire_event(s, NGX_RTMP_DISCONNECT, NULL, NULL);
if (s->ping_evt.timer_set) {
ngx_del_timer(&s->ping_evt);
}
if (s->in_old_pool) {
ngx_destroy_pool(s->in_old_pool);
}
if (s->in_pool) {
ngx_destroy_pool(s->in_pool);
}
ngx_rtmp_free_handshake_buffers(s);
while (s->out_pos != s->out_last) {
ngx_rtmp_free_shared_chain(cscf, s->out[s->out_pos++]);
s->out_pos %= s->out_queue;
}
}
ngx_rtmp_close_connection(c);
}
/*
停止直播发布或播放
*/
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_rtmp_gop_frame_t *
ngx_rtmp_gop_cache_free_frame(ngx_rtmp_session_t *s,
ngx_rtmp_gop_frame_t *frame)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_gop_cache_ctx_t *ctx;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
if (cscf == NULL) {
return NULL;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_gop_cache_module);
if (ctx == NULL) {
return NULL;
}
if (frame->frame) {
ngx_rtmp_free_shared_chain(cscf, frame->frame);
frame->frame = NULL;
}
if (frame->h.type == NGX_RTMP_MSG_VIDEO) {
ctx->video_frame_in_all--;
} else if (frame->h.type == NGX_RTMP_MSG_AUDIO) {
ctx->audio_frame_in_all--;
}
ngx_log_debug3(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"gop free frame: type='%s' video_frame_in_cache='%uD' "
"audio_frame_in_cache='%uD'",
frame->h.type == NGX_RTMP_MSG_VIDEO ? "video" : "audio",
ctx->video_frame_in_all, ctx->audio_frame_in_all);
return frame->next;
}
/* NOTE: this function does not free shared bufs on error */
ngx_int_t
ngx_rtmp_append_amf(ngx_rtmp_session_t *s,
ngx_chain_t **first, ngx_chain_t **last,
ngx_rtmp_amf_elt_t *elts, size_t nelts)
{
ngx_rtmp_amf_ctx_t act;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_int_t rc;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
memset(&act, 0, sizeof(act));
act.arg = cscf;
act.alloc = ngx_rtmp_alloc_amf_buf;
act.log = s->connection->log;
if (first) {
act.first = *first;
}
if (last) {
act.link = *last;
}
rc = ngx_rtmp_amf_write(&act, elts, nelts);
if (first) {
*first = act.first;
}
if (last) {
*last = act.link;
}
return rc;
}
static ngx_int_t
ngx_rtmp_record_node_open(ngx_rtmp_session_t *s,
ngx_rtmp_record_rec_ctx_t *rctx)
{
ngx_rtmp_record_app_conf_t *rracf;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_err_t err;
ngx_str_t path;
ngx_int_t mode, create_mode;
u_char buf[8], *p;
off_t file_size;
uint32_t tag_size, mlen, timestamp;
rracf = rctx->conf;
tag_size = 0;
if (rctx->file.fd != NGX_INVALID_FILE) {
return NGX_AGAIN;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"record: %V opening", &rracf->id);
ngx_memzero(rctx, sizeof(*rctx));
rctx->conf = rracf;
rctx->last = *ngx_cached_time;
rctx->timestamp = ngx_cached_time->sec;
ngx_rtmp_record_make_path(s, rctx, &path);
mode = rracf->append ? NGX_FILE_RDWR : NGX_FILE_WRONLY;
create_mode = rracf->append ? NGX_FILE_CREATE_OR_OPEN : NGX_FILE_TRUNCATE;
ngx_memzero(&rctx->file, sizeof(rctx->file));
rctx->file.offset = 0;
rctx->file.log = s->connection->log;
rctx->file.fd = ngx_open_file(path.data, mode, create_mode,
cscf->file_access);
ngx_str_set(&rctx->file.name, "recorded");
if (rctx->file.fd == NGX_INVALID_FILE) {
err = ngx_errno;
if (err != NGX_ENOENT) {
ngx_log_error(NGX_LOG_CRIT, s->connection->log, err,
"record: %V failed to open file '%V'",
&rracf->id, &path);
}
ngx_rtmp_record_notify_error(s, rctx);
return NGX_OK;
}
#if !(NGX_WIN32)
if (rracf->lock_file) {
err = ngx_lock_fd(rctx->file.fd);
if (err) {
ngx_log_error(NGX_LOG_CRIT, s->connection->log, err,
"record: %V lock failed", &rracf->id);
}
}
#endif
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"record: %V opened '%V'", &rracf->id, &path);
if (rracf->notify) {
ngx_rtmp_send_status(s, "NetStream.Record.Start", "status",
rracf->id.data ? (char *) rracf->id.data : "");
}
if (rracf->append) {
file_size = 0;
timestamp = 0;
#if (NGX_WIN32)
{
LONG lo, hi;
lo = 0;
hi = 0;
lo = SetFilePointer(rctx->file.fd, lo, &hi, FILE_END);
file_size = (lo == INVALID_SET_FILE_POINTER ?
(off_t) -1 : (off_t) hi << 32 | (off_t) lo);
}
#else
file_size = lseek(rctx->file.fd, 0, SEEK_END);
#endif
if (file_size == (off_t) -1) {
ngx_log_error(NGX_LOG_CRIT, s->connection->log, ngx_errno,
"record: %V seek failed", &rracf->id);
goto done;
}
if (file_size < 4) {
goto done;
}
if (ngx_read_file(&rctx->file, buf, 4, file_size - 4) != 4) {
ngx_log_error(NGX_LOG_CRIT, s->connection->log, ngx_errno,
"record: %V tag size read failed", &rracf->id);
goto done;
}
p = (u_char *) &tag_size;
p[0] = buf[3];
p[1] = buf[2];
p[2] = buf[1];
p[3] = buf[0];
if (tag_size == 0 || tag_size + 4 > file_size) {
file_size = 0;
goto done;
}
if (ngx_read_file(&rctx->file, buf, 8, file_size - tag_size - 4) != 8)
{
ngx_log_error(NGX_LOG_CRIT, s->connection->log, ngx_errno,
"record: %V tag read failed", &rracf->id);
goto done;
}
p = (u_char *) &mlen;
p[0] = buf[3];
p[1] = buf[2];
p[2] = buf[1];
p[3] = 0;
if (tag_size != mlen + 11) {
ngx_log_error(NGX_LOG_CRIT, s->connection->log, ngx_errno,
"record: %V tag size mismatch: "
"tag_size=%uD, mlen=%uD", &rracf->id, tag_size, mlen);
goto done;
}
p = (u_char *) ×tamp;
p[3] = buf[7];
p[0] = buf[6];
p[1] = buf[5];
p[2] = buf[4];
done:
rctx->file.offset = file_size;
rctx->time_shift = timestamp;
ngx_log_debug3(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"record: append offset=%O, time=%uD, tag_size=%uD",
file_size, timestamp, tag_size);
}
return NGX_OK;
}
static ngx_int_t
ngx_rtmp_relay_send_connect(ngx_rtmp_session_t *s)
{
static double trans = NGX_RTMP_RELAY_CONNECT_TRANS;
static double acodecs = 3575;
static double vcodecs = 252;
static ngx_rtmp_amf_elt_t out_cmd[] = {
{ NGX_RTMP_AMF_STRING,
ngx_string("app"),
NULL, 0 }, /* <-- fill */
{ NGX_RTMP_AMF_STRING,
ngx_string("tcUrl"),
NULL, 0 }, /* <-- fill */
{ NGX_RTMP_AMF_STRING,
ngx_string("pageUrl"),
NULL, 0 }, /* <-- fill */
{ NGX_RTMP_AMF_STRING,
ngx_string("swfUrl"),
NULL, 0 }, /* <-- fill */
{ NGX_RTMP_AMF_STRING,
ngx_string("flashVer"),
NULL, 0 }, /* <-- fill */
{ NGX_RTMP_AMF_NUMBER,
ngx_string("audioCodecs"),
&acodecs, 0 },
{ NGX_RTMP_AMF_NUMBER,
ngx_string("videoCodecs"),
&vcodecs, 0 }
};
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING,
ngx_null_string,
"connect", 0 },
{ NGX_RTMP_AMF_NUMBER,
ngx_null_string,
&trans, 0 },
{ NGX_RTMP_AMF_OBJECT,
ngx_null_string,
out_cmd, sizeof(out_cmd) }
};
ngx_rtmp_core_app_conf_t *cacf;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_relay_ctx_t *ctx;
ngx_rtmp_header_t h;
size_t len;
u_char *p;
cacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_core_module);
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_relay_module);
if (cacf == NULL || ctx == NULL) {
return NGX_ERROR;
}
/* app */
if (ctx->app.len) {
out_cmd[0].data = ctx->app.data;
out_cmd[0].len = ctx->app.len;
} else {
out_cmd[0].data = cacf->name.data;
out_cmd[0].len = cacf->name.len;
}
/* tcUrl */
if (ctx->tc_url.len) {
out_cmd[1].data = ctx->tc_url.data;
out_cmd[1].len = ctx->tc_url.len;
} else {
len = sizeof("rtmp://") - 1 + ctx->url.len +
sizeof("/") - 1 + ctx->app.len;
p = ngx_palloc(s->connection->pool, len);
if (p == NULL) {
return NGX_ERROR;
}
out_cmd[1].data = p;
p = ngx_cpymem(p, "rtmp://", sizeof("rtmp://") - 1);
p = ngx_cpymem(p, ctx->url.data, ctx->url.len);
*p++ = '/';
p = ngx_cpymem(p, ctx->app.data, ctx->app.len);
out_cmd[1].len = p - (u_char *)out_cmd[1].data;
}
/* pageUrl */
out_cmd[2].data = ctx->page_url.data;
out_cmd[2].len = ctx->page_url.len;
/* swfUrl */
out_cmd[3].data = ctx->swf_url.data;
out_cmd[3].len = ctx->swf_url.len;
/* flashVer */
if (ctx->flash_ver.len) {
out_cmd[4].data = ctx->flash_ver.data;
out_cmd[4].len = ctx->flash_ver.len;
} else {
out_cmd[4].data = NGX_RTMP_RELAY_FLASHVER;
out_cmd[4].len = sizeof(NGX_RTMP_RELAY_FLASHVER) - 1;
}
ngx_memzero(&h, sizeof(h));
h.csid = NGX_RTMP_RELAY_CSID_AMF_INI;
h.type = NGX_RTMP_MSG_AMF_CMD;
return ngx_rtmp_send_chunk_size(s, cscf->chunk_size) != NGX_OK
|| ngx_rtmp_send_ack_size(s, cscf->ack_window) != NGX_OK
|| ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK
? NGX_ERROR
: NGX_OK;
}
static ngx_int_t
ngx_rtmp_live_data(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
ngx_chain_t *in, ngx_rtmp_amf_elt_t *out_elts, ngx_uint_t out_elts_size)
{
ngx_rtmp_live_ctx_t *ctx, *pctx;
ngx_chain_t *data, *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;
ngx_int_t rc;
ngx_uint_t prio;
ngx_uint_t peers;
uint32_t delta;
ngx_rtmp_live_chunk_stream_t *cs;
u_char *msg_type;
msg_type = (u_char *)out_elts[0].data;
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", msg_type);
return NGX_OK;
}
/* drop the data packet if the stream is not active */
if (!ctx->stream->active) {
return NGX_OK;
}
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: %s packet timestamp=%uD",
msg_type, h->timestamp);
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
cs = &ctx->cs[2];
cs->active = 1;
peers = 0;
prio = 0;
data = NULL;
rc = ngx_rtmp_append_amf(s, &data, NULL, out_elts, out_elts_size);
if (rc != NGX_OK) {
if (data) {
ngx_rtmp_free_shared_chain(cscf, data);
}
return NGX_ERROR;
}
ngx_memzero(&ch, sizeof(ch));
ch.timestamp = h->timestamp;
ch.msid = NGX_RTMP_MSID;
ch.csid = h->csid;
ch.type = NGX_RTMP_MSG_AMF_META;
delta = ch.timestamp - cs->timestamp;
rpkt = ngx_rtmp_append_shared_bufs(cscf, data, in);
ngx_rtmp_prepare_message(s, &ch, NULL, rpkt);
for (pctx = ctx->stream->ctx; pctx; pctx = pctx->next) {
if (pctx == ctx || pctx->paused) {
continue;
}
ss = pctx->session;
if (ngx_rtmp_send_message(ss, rpkt, prio) != NGX_OK) {
++pctx->ndropped;
cs->dropped += delta;
continue;
}
cs->timestamp += delta;
++peers;
ss->current_time = cs->timestamp;
}
if (data) {
ngx_rtmp_free_shared_chain(cscf, data);
}
if (rpkt) {
ngx_rtmp_free_shared_chain(cscf, rpkt);
}
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(&ctx->stream->bw_in_data, h->mlen);
return NGX_OK;
}
static ngx_int_t
ngx_live_relay_httpflv_parse(ngx_rtmp_session_t *s, ngx_buf_t *b)
{
u_char ch, *p, *pc;
ngx_rtmp_stream_t *st;
ngx_rtmp_header_t *h;
ngx_chain_t **ll;
size_t len;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_int_t rc = NGX_AGAIN;
enum {
flv_header_F = 0,
flv_header_FL,
flv_header_FLV,
flv_header_Version,
flv_header_Flags,
flv_header_DataOffset0,
flv_header_DataOffset1,
flv_header_DataOffset2,
flv_header_DataOffset3,
flv_tagsize0,
flv_tagsize1,
flv_tagsize2,
flv_tagsize3,
flv_tagtype,
flv_datasize0,
flv_datasize1,
flv_datasize2,
flv_timestamp0,
flv_timestamp1,
flv_timestamp2,
flv_timestamp_extended,
flv_streamid0,
flv_streamid1,
flv_streamid2,
flv_data
} state;
state = s->flv_state;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
for (p = b->pos; p < b->last; ++p) {
ch = *p;
switch (state) {
case flv_header_F:
switch (ch) {
case 'F':
state = flv_header_FL;
break;
default:
rc = NGX_ERROR;
goto done;
}
break;
case flv_header_FL:
switch (ch) {
case 'L':
state = flv_header_FLV;
break;
default:
rc = NGX_ERROR;
goto done;
}
break;
case flv_header_FLV:
switch (ch) {
case 'V':
state = flv_header_Version;
break;
default:
rc = NGX_ERROR;
goto done;
}
break;
case flv_header_Version:
s->flv_version = ch;
if (s->flv_version != 1) {
rc = NGX_ERROR;
goto done;
}
state = flv_header_Flags;
break;
case flv_header_Flags:
s->flv_flags = ch;
state = flv_header_DataOffset0;
break;
case flv_header_DataOffset0:
pc = (u_char *) &s->flv_data_offset;
pc[3] = ch;
state = flv_header_DataOffset1;
break;
case flv_header_DataOffset1:
pc = (u_char *) &s->flv_data_offset;
pc[2] = ch;
state = flv_header_DataOffset2;
break;
case flv_header_DataOffset2:
pc = (u_char *) &s->flv_data_offset;
pc[1] = ch;
state = flv_header_DataOffset3;
break;
case flv_header_DataOffset3:
pc = (u_char *) &s->flv_data_offset;
pc[0] = ch;
state = flv_tagsize0;
break;
case flv_tagsize0:
s->flv_tagsize = 0;
pc = (u_char *) &s->flv_tagsize;
pc[3] = ch;
state = flv_tagsize1;
break;
case flv_tagsize1:
pc = (u_char *) &s->flv_tagsize;
pc[2] = ch;
state = flv_tagsize2;
break;
case flv_tagsize2:
pc = (u_char *) &s->flv_tagsize;
pc[1] = ch;
state = flv_tagsize3;
break;
case flv_tagsize3:
pc = (u_char *) &s->flv_tagsize;
pc[0] = ch;
st = &s->in_streams[0];
h = &st->hdr;
if (h->mlen == 0 && s->flv_first_pts == 0) {
s->flv_first_pts = 1;
if (s->flv_tagsize != 0) {
rc = NGX_ERROR;
goto done;
}
} else {
if (h->mlen + 11 != s->flv_tagsize) {
rc = NGX_ERROR;
goto done;
}
}
state = flv_tagtype;
break;
case flv_tagtype:
if (ch != NGX_RTMP_MSG_AMF_META && ch != NGX_RTMP_MSG_AUDIO
&& ch != NGX_RTMP_MSG_VIDEO)
{
rc = NGX_ERROR;
goto done;
}
st = &s->in_streams[0];
h = &st->hdr;
h->type = ch;
state = flv_datasize0;
break;
case flv_datasize0:
st = &s->in_streams[0];
h = &st->hdr;
h->mlen = 0;
pc = (u_char *) &h->mlen;
pc[2] = ch;
state = flv_datasize1;
break;
case flv_datasize1:
st = &s->in_streams[0];
h = &st->hdr;
pc = (u_char *) &h->mlen;
pc[1] = ch;
state = flv_datasize2;
break;
case flv_datasize2:
st = &s->in_streams[0];
h = &st->hdr;
pc = (u_char *) &h->mlen;
pc[0] = ch;
state = flv_timestamp0;
st->len = h->mlen;
break;
case flv_timestamp0:
st = &s->in_streams[0];
h = &st->hdr;
pc = (u_char *) &h->timestamp;
pc[2] = ch;
state = flv_timestamp1;
break;
case flv_timestamp1:
st = &s->in_streams[0];
h = &st->hdr;
pc = (u_char *) &h->timestamp;
pc[1] = ch;
state = flv_timestamp2;
break;
case flv_timestamp2:
st = &s->in_streams[0];
h = &st->hdr;
pc = (u_char *) &h->timestamp;
pc[0] = ch;
state = flv_timestamp_extended;
break;
case flv_timestamp_extended:
st = &s->in_streams[0];
h = &st->hdr;
pc = (u_char *) &h->timestamp;
pc[3] = ch;
state = flv_streamid0;
break;
case flv_streamid0:
st = &s->in_streams[0];
h = &st->hdr;
h->msid = 0;
pc = (u_char *) &h->msid;
pc[2] = ch;
state = flv_streamid1;
break;
case flv_streamid1:
st = &s->in_streams[0];
h = &st->hdr;
pc = (u_char *) &h->msid;
pc[1] = ch;
state = flv_streamid2;
break;
case flv_streamid2:
st = &s->in_streams[0];
h = &st->hdr;
pc = (u_char *) &h->msid;
pc[0] = ch;
state = flv_data;
break;
case flv_data:
st = &s->in_streams[0];
for (ll = &st->in; (*ll) && (*ll)->buf->last == (*ll)->buf->end;
ll = &(*ll)->next);
for (;;) {
if (*ll == NULL) {
*ll = ngx_get_chainbuf(cscf->chunk_size, 1);
}
len = ngx_min(st->len, b->last - p);
if ((*ll)->buf->end - (*ll)->buf->last >= (long) len) {
(*ll)->buf->last = ngx_cpymem((*ll)->buf->last, p, len);
p += len;
st->len -= len;
break;
}
len = (*ll)->buf->end - (*ll)->buf->last;
(*ll)->buf->last = ngx_cpymem((*ll)->buf->last, p, len);
p += len;
st->len -= len;
ll = &(*ll)->next;
}
if (st->len != 0) {
rc = NGX_AGAIN;
goto done;
}
state = flv_tagsize0;
rc = NGX_OK;
goto done;
}
}
done:
b->pos = p;
s->flv_state = state;
return rc;
}
static ngx_int_t
ngx_rtmp_gop_cache_alloc_cache(ngx_rtmp_session_t *s)
{
ngx_rtmp_codec_ctx_t *codec_ctx;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_gop_cache_ctx_t *ctx;
ngx_rtmp_gop_cache_t *cache, **iter;
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_gop_cache_module);
if (ctx == NULL) {
return NGX_ERROR;
}
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
if (codec_ctx == NULL) {
return NGX_ERROR;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
if (cscf == NULL) {
return NGX_ERROR;
}
if (ctx->free_cache) {
cache = ctx->free_cache;
ctx->free_cache = cache->next;
ngx_memzero(cache, sizeof(ngx_rtmp_gop_cache_t));
} else {
cache = ngx_pcalloc(ctx->pool, sizeof(ngx_rtmp_gop_cache_t));
if (cache == NULL) {
return NGX_ERROR;
}
}
// save video seq header.
if (codec_ctx->avc_header && ctx->video_seq_header == NULL) {
ctx->video_seq_header = codec_ctx->avc_header;
}
// save audio seq header.
if (codec_ctx->aac_header && ctx->audio_seq_header == NULL) {
ctx->audio_seq_header = codec_ctx->aac_header;
}
// save metadata.
if (codec_ctx->meta && ctx->meta == NULL) {
ctx->meta_version = codec_ctx->meta_version;
ctx->meta = codec_ctx->meta;
}
if (ctx->cache_head == NULL) {
ctx->cache_tail = ctx->cache_head = cache;
} else {
iter = &ctx->cache_tail->next;
*iter = cache;
ctx->cache_tail = cache;
}
ctx->gop_cache_count++;
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"gop alloc cache: gop_cache_count='%uD'", ctx->gop_cache_count);
return NGX_OK;
}
static void
ngx_rtmp_play_read_meta(ngx_rtmp_session_t *s)
{
ngx_rtmp_play_ctx_t *ctx;
ssize_t n;
ngx_rtmp_header_t h;
ngx_chain_t *out, in;
ngx_buf_t in_buf;
ngx_rtmp_core_srv_conf_t *cscf;
uint32_t size;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
if (ctx == NULL) {
return;
}
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: read meta");
/* read tag header */
n = ngx_read_file(&ctx->file, ngx_rtmp_play_header,
sizeof(ngx_rtmp_play_header), NGX_RTMP_PLAY_DATA_OFFSET);
if (n != sizeof(ngx_rtmp_play_header)) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"play: could not read metadata tag header");
return;
}
if (ngx_rtmp_play_header[0] != NGX_RTMP_MSG_AMF_META) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: first tag is not metadata, giving up");
return;
}
ngx_memzero(&h, sizeof(h));
h.type = NGX_RTMP_MSG_AMF_META;
h.msid = NGX_RTMP_LIVE_MSID;
h.csid = NGX_RTMP_LIVE_CSID_META;
size = 0;
ngx_rtmp_rmemcpy(&size, ngx_rtmp_play_header + 1, 3);
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: metadata size=%D", size);
if (size > sizeof(ngx_rtmp_play_buffer)) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"play: too big metadata");
return;
}
/* read metadata */
n = ngx_read_file(&ctx->file, ngx_rtmp_play_buffer,
size, sizeof(ngx_rtmp_play_header) +
NGX_RTMP_PLAY_DATA_OFFSET);
if (n != (ssize_t) size) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"play: could not read metadata");
return;
}
/* prepare input chain */
ngx_memzero(&in, sizeof(in));
ngx_memzero(&in_buf, sizeof(in_buf));
in.buf = &in_buf;
in_buf.pos = ngx_rtmp_play_buffer;
in_buf.last = ngx_rtmp_play_buffer + size;
ngx_rtmp_play_init_index(s, &in);
/* output chain */
out = ngx_rtmp_append_shared_bufs(cscf, NULL, &in);
ngx_rtmp_prepare_message(s, &h, NULL, out);
ngx_rtmp_send_message(s, out, 0);
ngx_rtmp_free_shared_chain(cscf, out);
}
static void
ngx_rtmp_gop_cache_frame(ngx_rtmp_session_t *s, ngx_uint_t prio,
ngx_rtmp_header_t *ch, ngx_chain_t *frame)
{
ngx_rtmp_gop_cache_ctx_t *ctx;
ngx_rtmp_codec_ctx_t *codec_ctx;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_gop_cache_app_conf_t *gacf;
ngx_rtmp_gop_frame_t *gf;
gacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_gop_cache_module);
if (gacf == NULL || !gacf->gop_cache) {
return;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
if (cscf == NULL) {
return;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_gop_cache_module);
if (ctx == NULL) {
return;
}
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
if (codec_ctx == NULL) {
return;
}
if (ch->type == NGX_RTMP_MSG_VIDEO) {
// drop video when not H.264
if (codec_ctx->video_codec_id != NGX_RTMP_VIDEO_H264) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"drop video non-H.264 encode type timestamp='%uD'",
ch->timestamp);
return;
}
// drop non-IDR
if (prio != NGX_RTMP_VIDEO_KEY_FRAME && ctx->cache_head == NULL) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"drop video non-keyframe timestamp='%uD'",
ch->timestamp);
return;
}
}
// pure audio
if (ctx->video_frame_in_all == 0 && ch->type == NGX_RTMP_MSG_AUDIO) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"drop audio frame timestamp='%uD'",
ch->timestamp);
return;
}
if (ch->type == NGX_RTMP_MSG_VIDEO && prio == NGX_RTMP_VIDEO_KEY_FRAME) {
if (ngx_rtmp_gop_cache_alloc_cache(s) != NGX_OK) {
return;
}
}
gf = ngx_rtmp_gop_cache_alloc_frame(s);
if (gf == NULL) {
return;
}
gf->h = *ch;
gf->prio = prio;
gf->next = NULL;
gf->frame = ngx_rtmp_append_shared_bufs(cscf, NULL, frame);
if (ngx_rtmp_gop_cache_link_frame(s, gf) != NGX_OK) {
ngx_rtmp_free_shared_chain(cscf, gf->frame);
return;
}
if (ctx->video_frame_in_all > gacf->gop_max_video_count ||
ctx->audio_frame_in_all > gacf->gop_max_audio_count ||
(ctx->video_frame_in_all + ctx->audio_frame_in_all)
> gacf->gop_max_frame_count)
{
ngx_log_error(NGX_LOG_WARN, s->connection->log, 0,
"gop cache: video_frame_in_cache='%uD' "
"audio_frame_in_cache='%uD' max_video_count='%uD' "
"max_audio_count='%uD' gop_max_frame_count='%uD'",
ctx->video_frame_in_all, ctx->audio_frame_in_all,
gacf->gop_max_video_count, gacf->gop_max_audio_count,
gacf->gop_max_frame_count);
ngx_rtmp_gop_cache_cleanup(s);
return;
}
ngx_rtmp_gop_cache_update(s);
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"gop cache: cache packet type='%s' timestamp='%uD'",
gf->h.type == NGX_RTMP_MSG_AUDIO ? "audio" : "video",
gf->h.timestamp);
}
static ngx_int_t
ngx_rtmp_play_next_entry(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
{
ngx_rtmp_play_app_conf_t *pacf;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_play_ctx_t *ctx;
ngx_rtmp_play_entry_t *pe;
u_char *p;
static u_char path[NGX_MAX_PATH + 1];
pacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_play_module);
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
for ( ;; ) {
if (ctx->file.fd != NGX_INVALID_FILE) {
ngx_close_file(ctx->file.fd);
ctx->file.fd = NGX_INVALID_FILE;
}
if (ctx->file_id) {
ngx_rtmp_play_cleanup_local_file(s);
}
ctx->nentry = (ctx->nentry == NGX_CONF_UNSET_UINT ?
0 : ctx->nentry + 1);
if (ctx->nentry >= pacf->entries.nelts) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: all entries failed");
ngx_rtmp_send_status(s, "NetStream.Play.StreamNotFound", "error",
"Video on demand stream not found");
break;
}
pe = ngx_rtmp_play_get_current_entry(s);
ngx_log_debug4(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: trying %s entry %ui/%uz '%V'",
pe->url ? "remote" : "local",
ctx->nentry + 1, pacf->entries.nelts,
pe->url ? &pe->url->url : pe->root);
/* open remote */
if (pe->url) {
return ngx_rtmp_play_open_remote(s, v);
}
/* open local */
p = ngx_snprintf(path, NGX_MAX_PATH, "%V/%s%V",
pe->root, v->name + ctx->pfx_size, &ctx->sfx);
*p = 0;
ctx->file.fd = ngx_open_file(path, NGX_FILE_RDONLY, NGX_FILE_OPEN,
cscf->file_access);
if (ctx->file.fd == NGX_INVALID_FILE) {
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, ngx_errno,
"play: error opening file '%s'", path);
continue;
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: open local file '%s'", path);
if (ngx_rtmp_play_open(s, v->start) != NGX_OK) {
return NGX_ERROR;
}
break;
}
return next_play(s, v);
}
ngx_rtmp_session_t *
ngx_rtmp_init_session(ngx_connection_t *c, ngx_rtmp_addr_conf_t *addr_conf)
{
ngx_rtmp_session_t *s;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_error_log_ctx_t *ctx;
s = ngx_pcalloc(c->pool, sizeof(ngx_rtmp_session_t) +
sizeof(ngx_chain_t *) * ((ngx_rtmp_core_srv_conf_t *)
addr_conf->ctx-> srv_conf[ngx_rtmp_core_module
.ctx_index])->out_queue);
if (s == NULL) {
ngx_rtmp_close_connection(c);
return NULL;
}
s->main_conf = addr_conf->ctx->main_conf;
s->srv_conf = addr_conf->ctx->srv_conf;
s->addr_text = &addr_conf->addr_text;
c->data = s;
s->connection = c;
ctx = ngx_palloc(c->pool, sizeof(ngx_rtmp_error_log_ctx_t));
if (ctx == NULL) {
ngx_rtmp_close_connection(c);
return NULL;
}
ctx->client = &c->addr_text;
ctx->session = s;
c->log->connection = c->number;
c->log->handler = ngx_rtmp_log_error;
c->log->data = ctx;
c->log->action = NULL;
c->log_error = NGX_ERROR_INFO;
s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_rtmp_max_module);
if (s->ctx == NULL) {
ngx_rtmp_close_connection(c);
return NULL;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
s->out_queue = cscf->out_queue;
s->out_cork = cscf->out_cork;
s->in_streams = ngx_pcalloc(c->pool, sizeof(ngx_rtmp_stream_t)
* cscf->max_streams);
if (s->in_streams == NULL) {
ngx_rtmp_close_connection(c);
return NULL;
}
s->epoch = ngx_current_msec;
s->timeout = cscf->timeout;
ngx_rtmp_set_chunk_size(s, NGX_RTMP_DEFAULT_CHUNK_SIZE);
if (ngx_rtmp_fire_event(s, NGX_RTMP_CONNECT, NULL, NULL) != NGX_OK) {
ngx_rtmp_finalize_session(s);
return NULL;
}
return s;
}
/*
直播音视频处理
*/
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; /* 当前rtmp header */
ngx_rtmp_header_t lh; /* 上一个rtmp header*/
ngx_rtmp_header_t clh; /* 音频转化视频的rtmp header */
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;
}
/* 从会话中获取live ctx */
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); /* 视频 csidx为0 音频csidx为0 */
cs = &ctx->cs[csidx];
ngx_memzero(&ch, sizeof(ch));
ch.timestamp = h->timestamp; /* 从接收报文中获取时间戳 */
ch.msid = NGX_RTMP_MSID;
ch.csid = cs->csid;
ch.type = h->type; /* 从接收报文中获取类型 */
lh = ch;
if (cs->active) {
lh.timestamp = cs->timestamp; /* 从流中获取时戳 */
}
clh = lh;
clh.type = (h->type == NGX_RTMP_MSG_AUDIO ? NGX_RTMP_MSG_VIDEO :
NGX_RTMP_MSG_AUDIO); /* 如果是音频与视频相互转换，类型一定是视频 */
cs->active = 1;
cs->timestamp = ch.timestamp; /* 更新时戳 */
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);
/* 转码处理 */
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) {
/* 发布rtmp流本身或者该播放流已中止 */
continue;
}
ss = pctx->session;
cs = &pctx->cs[csidx];
/* send metadata */
/* 发送元数据 */
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) { /* 流没有启动 */
if (mandatory) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: skipping header");
continue;
}
/* 等待视频 */
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;
}
/* 等待关键帧 */
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;
/*
生成dummy audio
*/
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); /* aapk如果申请失败，需要作一下失败处理，避免访问空指针 */
if(NULL != aapkt){
ngx_rtmp_prepare_message(s, &clh, NULL, aapkt);
}
}
}
/* 转码 */
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);
}
/* 更新直播流带宽信息 */
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_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; //指向某一个peer对应的session
ngx_rtmp_header_t ch, lh, clh;
ngx_int_t rc, mandatory, dummy_audio;
ngx_uint_t prio; //Frame Type
ngx_uint_t peers; //记录订阅的用户数目
ngx_uint_t meta_version;
ngx_uint_t csidx;
uint32_t delta;
ngx_rtmp_live_chunk_stream_t *cs;
const char *type_s; //类型
type_s = (h->type == NGX_RTMP_MSG_VIDEO ? "video" : "audio");
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_error(NGX_LOG_INFO, s->connection->log, 0,
"live: name = %s, %s from non-publisher",
ctx->stream->name, type_s);
return NGX_OK;
}
if (!ctx->stream->active) {
ngx_rtmp_live_start(s);
}
// 更新计时器
if (ctx->idle_evt.timer_set) {
ngx_add_timer(&ctx->idle_evt, lacf->idle_timeout);
}
s->current_time = h->timestamp;
peers = 0; //记录所有的peers数目
apkt = NULL;
aapkt = NULL;
acopkt = NULL;
header = NULL; //aac_header or avc_header
coheader = NULL; //avc_header or aac_header
meta = NULL; //meta data
meta_version = 0; //meta version
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);
// 如果是video，并且不允许video跟audio transmitted on the same RTMP chunk stream
csidx = !(lacf->interleave || h->type == NGX_RTMP_MSG_VIDEO);
cs = &ctx->cs[csidx];
ngx_memzero(&ch, sizeof(ch));
ch.timestamp = h->timestamp; //时间戳
ch.msid = NGX_RTMP_MSID; /* message stream id */
ch.csid = cs->csid; /* chunk stream id,video = 0,audio = 1*/
ch.type = h->type; //音视频
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;
}
//AAC sequence 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;
}
// AVC sequence 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_error(NGX_LOG_INFO, ss->connection->log, 0,
"live: av name = %s send meta",
ctx->stream->name);
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_error(NGX_LOG_INFO, ss->connection->log, 0,
"live: av name = %s, skipping header",
ctx->stream->name);
continue;
}
if (lacf->wait_video && h->type == NGX_RTMP_MSG_AUDIO &&
!pctx->cs[0].active)
{
ngx_log_error(NGX_LOG_INFO, ss->connection->log, 0,
"live: av name = %s waiting for video",
ctx->stream->name);
continue;
}
// 对于video，先从关键帧开始推送
if (lacf->wait_key && prio != NGX_RTMP_VIDEO_KEY_FRAME &&
(lacf->interleave || h->type == NGX_RTMP_MSG_VIDEO))
{
ngx_log_error(NGX_LOG_INFO, ss->connection->log, 0,
"live: av name = %s skip non-key",
ctx->stream->name);
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_error(NGX_LOG_INFO, ss->connection->log, 0,
"live: av name = %s abs %s codec header timestamp=%uD",
ctx->stream->name, 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_error(NGX_LOG_INFO, ss->connection->log, 0,
"live: av name = %s mandatory packet failed",
ctx->stream->name);
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);
// ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
// "live: name = %s ,%s packet timestamp = %uD ,pees number = %d, bw_in_bytes = %uD, bw_out_bytes = %uD",
// ctx->stream->name ,type_s, h->timestamp,
// peers, ctx->stream->bw_in.bytes, ctx->stream->bw_out.bytes);
return NGX_OK;
}
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 *out, *peer_out, *header_out, *pheader_out;
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;
ngx_uint_t prio, peer_prio;
ngx_uint_t peers, dropped_peers;
size_t header_offset;
ngx_uint_t header_version;
lacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_live_module);
if (lacf == NULL) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: NULL application");
return NGX_ERROR;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (!lacf->live
|| in == NULL || in->buf == NULL
|| ctx == NULL || ctx->stream == NULL
|| (h->type != NGX_RTMP_MSG_VIDEO
&& h->type != NGX_RTMP_MSG_AUDIO))
{
return NGX_OK;
}
if ((ctx->flags & NGX_RTMP_LIVE_PUBLISHING) == 0) {
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: received audio/video from non-publisher");
return NGX_OK;
}
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"live: av: %s timestamp=%uD",
h->type == NGX_RTMP_MSG_VIDEO ? "video" : "audio",
h->timestamp);
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
/* prepare output header */
ngx_memzero(&ch, sizeof(ch));
ngx_memzero(&lh, sizeof(lh));
ch.timestamp = h->timestamp;
ch.msid = NGX_RTMP_LIVE_MSID;
ch.type = h->type;
lh.msid = ch.msid;
if (h->type == NGX_RTMP_MSG_VIDEO) {
prio = ngx_rtmp_get_video_frame_type(in);
ch.csid = NGX_RTMP_LIVE_CSID_VIDEO;
lh.timestamp = ctx->last_video;
ctx->last_video = ch.timestamp;
} else {
/* audio priority is the same as video key frame's */
prio = NGX_RTMP_VIDEO_KEY_FRAME;
ch.csid = NGX_RTMP_LIVE_CSID_AUDIO;
lh.timestamp = ctx->last_audio;
ctx->last_audio = ch.timestamp;
}
lh.csid = ch.csid;
out = ngx_rtmp_append_shared_bufs(cscf, NULL, in);
ngx_rtmp_prepare_message(s, &ch, &lh, out);
peers = 0;
dropped_peers = 0;
codec_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_codec_module);
header_out = NULL;
pheader_out = NULL;
header_offset = 0;
header_version = 0;
if (codec_ctx) {
if (h->type == NGX_RTMP_MSG_AUDIO) {
if (codec_ctx->aac_pheader) {
header_out = codec_ctx->aac_header;
pheader_out = codec_ctx->aac_pheader;
header_offset = offsetof(ngx_rtmp_live_ctx_t, aac_version);
header_version = codec_ctx->aac_version;
}
} else {
if (codec_ctx->avc_pheader) {
header_out = codec_ctx->avc_header;
pheader_out = codec_ctx->avc_pheader;
header_offset = offsetof(ngx_rtmp_live_ctx_t, avc_version);
header_version = codec_ctx->avc_version;
}
}
}
/* broadcast to all subscribers */
for (pctx = ctx->stream->ctx; pctx; pctx = pctx->next) {
if (pctx == ctx) {
continue;
}
++peers;
ss = pctx->session;
/* send absolute frame */
if ((pctx->msg_mask & (1 << h->type)) == 0) {
ch.timestamp = ngx_current_msec - ss->epoch;
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: av: abs %s timestamp=%uD",
h->type == NGX_RTMP_MSG_VIDEO ? "video" : "audio",
ch.timestamp);
/* send codec header as abs frame if any */
peer_out = ngx_rtmp_append_shared_bufs(cscf, NULL,
header_out ? header_out : in);
ngx_rtmp_prepare_message(s, &ch, NULL, peer_out);
pctx->msg_mask |= (1 << h->type);
if (ngx_rtmp_send_message(ss, peer_out, prio) == NGX_OK
&& header_out)
{
*(ngx_uint_t *)((u_char *)pctx + header_offset)
= header_version;
}
ngx_rtmp_free_shared_chain(cscf, peer_out);
continue;
}
/* send AVC/H264 header if newer header has arrived */
if (pheader_out && *(ngx_uint_t *)((u_char *)pctx + header_offset)
!= header_version)
{
ngx_log_debug0(NGX_LOG_DEBUG_RTMP, ss->connection->log, 0,
"live: sending codec header");
if (ngx_rtmp_send_message(ss, pheader_out, prio) == NGX_OK) {
*(ngx_uint_t *)((u_char *)pctx + header_offset)
= header_version;
}
}
/* push buffered data */
peer_prio = prio;
if (ngx_rtmp_send_message(ss, out, peer_prio) != NGX_OK) {
++pctx->dropped;
++dropped_peers;
}
}
ngx_rtmp_free_shared_chain(cscf, out);
ngx_rtmp_update_bandwidth(&ctx->stream->bw_in, h->mlen);
ngx_rtmp_update_bandwidth(&ctx->stream->bw_out,
h->mlen * (peers - dropped_peers));
return NGX_OK;
}
static ngx_chain_t *
ngx_rtmp_notify_connect_create(ngx_rtmp_session_t *s, void *arg,
ngx_pool_t *pool)
{
ngx_rtmp_connect_t *v = arg;
ngx_rtmp_notify_srv_conf_t *nscf;
ngx_url_t *url;
ngx_chain_t *al, *bl;
ngx_buf_t *b;
ngx_str_t *addr_text;
size_t app_len, args_len, flashver_len,
swf_url_len, tc_url_len, page_url_len;
nscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_notify_module);
al = ngx_alloc_chain_link(pool);
if (al == NULL) {
return NULL;
}
/* these values are still missing in session
* so we have to construct the request from
* connection struct */
app_len = ngx_strlen(v->app);
args_len = ngx_strlen(v->args);
flashver_len = ngx_strlen(v->flashver);
swf_url_len = ngx_strlen(v->swf_url);
tc_url_len = ngx_strlen(v->tc_url);
page_url_len = ngx_strlen(v->page_url);
addr_text = &s->connection->addr_text;
b = ngx_create_temp_buf(pool,
sizeof("call=connect") - 1 +
sizeof("&app=") - 1 + app_len * 3 +
sizeof("&flashver=") - 1 + flashver_len * 3 +
sizeof("&swfurl=") - 1 + swf_url_len * 3 +
sizeof("&tcurl=") - 1 + tc_url_len * 3 +
sizeof("&pageurl=") - 1 + page_url_len * 3 +
sizeof("&addr=") - 1 + addr_text->len * 3 +
1 + args_len
);
if (b == NULL) {
return NULL;
}
al->buf = b;
al->next = NULL;
b->last = ngx_cpymem(b->last, (u_char*) "app=", sizeof("app=") - 1);
b->last = (u_char*) ngx_escape_uri(b->last, v->app, app_len,
NGX_ESCAPE_ARGS);
b->last = ngx_cpymem(b->last, (u_char*) "&flashver=",
sizeof("&flashver=") - 1);
b->last = (u_char*) ngx_escape_uri(b->last, v->flashver, flashver_len,
NGX_ESCAPE_ARGS);
b->last = ngx_cpymem(b->last, (u_char*) "&swfurl=",
sizeof("&swfurl=") - 1);
b->last = (u_char*) ngx_escape_uri(b->last, v->swf_url, swf_url_len,
NGX_ESCAPE_ARGS);
b->last = ngx_cpymem(b->last, (u_char*) "&tcurl=",
sizeof("&tcurl=") - 1);
b->last = (u_char*) ngx_escape_uri(b->last, v->tc_url, tc_url_len,
NGX_ESCAPE_ARGS);
b->last = ngx_cpymem(b->last, (u_char*) "&pageurl=",
sizeof("&pageurl=") - 1);
b->last = (u_char*) ngx_escape_uri(b->last, v->page_url, page_url_len,
NGX_ESCAPE_ARGS);
b->last = ngx_cpymem(b->last, (u_char*) "&addr=", sizeof("&addr=") -1);
b->last = (u_char*) ngx_escape_uri(b->last, addr_text->data,
addr_text->len, NGX_ESCAPE_ARGS);
b->last = ngx_cpymem(b->last, (u_char*) "&call=connect",
sizeof("&call=connect") - 1);
if (args_len) {
*b->last++ = '&';
b->last = (u_char *) ngx_cpymem(b->last, v->args, args_len);
}
url = nscf->url[NGX_RTMP_NOTIFY_CONNECT];
bl = NULL;
if (nscf->method == NGX_RTMP_NETCALL_HTTP_POST) {
bl = al;
al = NULL;
}
return ngx_rtmp_netcall_http_format_request(nscf->method, &url->host,
&url->uri, al, bl, pool,
&ngx_rtmp_notify_urlencoded);
}
static ngx_int_t
ngx_rtmp_cmd_connect(ngx_rtmp_session_t *s, ngx_rtmp_connect_t *v)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_rtmp_core_app_conf_t **cacfp;
ngx_uint_t n;
size_t len;
ngx_rtmp_header_t h;
static double trans;
static double capabilities = NGX_RTMP_CAPABILITIES;
static double object_encoding = 0;
static ngx_rtmp_amf_elt_t out_obj[] = {
{ NGX_RTMP_AMF_STRING,
ngx_string("fmsVer"),
NGX_RTMP_FMS_VERSION, 0 },
{ NGX_RTMP_AMF_NUMBER,
ngx_string("capabilities"),
&capabilities, 0 },
};
static ngx_rtmp_amf_elt_t out_inf[] = {
{ NGX_RTMP_AMF_STRING,
ngx_string("level"),
"status", 0 },
{ NGX_RTMP_AMF_STRING,
ngx_string("code"),
"NetConnection.Connect.Success", 0 },
{ NGX_RTMP_AMF_STRING,
ngx_string("description"),
"Connection succeeded.", 0 },
{ NGX_RTMP_AMF_NUMBER,
ngx_string("objectEncoding"),
&object_encoding, 0 }
};
static ngx_rtmp_amf_elt_t out_elts[] = {
{ NGX_RTMP_AMF_STRING,
ngx_null_string,
"_result", 0 },
{ NGX_RTMP_AMF_NUMBER,
ngx_null_string,
&trans, 0 },
{ NGX_RTMP_AMF_OBJECT,
ngx_null_string,
out_obj, sizeof(out_obj) },
{ NGX_RTMP_AMF_OBJECT,
ngx_null_string,
out_inf, sizeof(out_inf) },
};
if (s->connected) {
ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
"connect: duplicate connection");
return NGX_ERROR;
}
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
ngx_log_debug8(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"connect: app='%s' flashver='%s' swf_url='%s' "
"tc_url='%s' page_url='%s' acodecs=%uD vcodecs=%uD "
"object_encoding=%ui",
v->app, v->flashver, v->swf_url, v->tc_url, v->page_url,
(uint32_t)v->acodecs, (uint32_t)v->vcodecs,
(ngx_int_t)v->object_encoding);
trans = v->trans;
/* fill session parameters */
s->connected = 1;
ngx_memzero(&h, sizeof(h));
h.csid = NGX_RTMP_CMD_CSID_AMF_INI;
h.type = NGX_RTMP_MSG_AMF_CMD;
#define NGX_RTMP_SET_STRPAR(name) \
s->name.len = ngx_strlen(v->name); \
s->name.data = ngx_palloc(s->connection->pool, s->name.len); \
ngx_memcpy(s->name.data, v->name, s->name.len)
NGX_RTMP_SET_STRPAR(app);
NGX_RTMP_SET_STRPAR(flashver);
NGX_RTMP_SET_STRPAR(swf_url);
NGX_RTMP_SET_STRPAR(tc_url);
NGX_RTMP_SET_STRPAR(page_url);
#undef NGX_RTMP_SET_STRPAR
s->acodecs = v->acodecs;
s->vcodecs = v->vcodecs;
/* find application & set app_conf */
len = ngx_strlen(v->app);
cacfp = cscf->applications.elts;
for(n = 0; n < cscf->applications.nelts; ++n, ++cacfp) {
if ((*cacfp)->name.len == len
&& !ngx_strncmp((*cacfp)->name.data, v->app, len))
{
/* found app! */
s->app_conf = (*cacfp)->app_conf;
break;
}
}
if (s->app_conf == NULL) {
ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
"connect: application not found: '%s'", v->app);
return NGX_ERROR;
}
object_encoding = v->object_encoding;
/* send all replies */
return ngx_rtmp_send_ack_size(s, cscf->ack_window) != NGX_OK
|| ngx_rtmp_send_bandwidth(s, cscf->ack_window,
NGX_RTMP_LIMIT_DYNAMIC) != NGX_OK
|| ngx_rtmp_send_chunk_size(s, cscf->chunk_size) != NGX_OK
|| ngx_rtmp_send_amf(s, &h, out_elts,
sizeof(out_elts) / sizeof(out_elts[0])) != NGX_OK
? NGX_ERROR
: NGX_OK;
}
static void
ngx_rtmp_play_send(ngx_event_t *e)
{
ngx_rtmp_session_t *s;
ngx_rtmp_play_ctx_t *ctx;
uint32_t last_timestamp;
ngx_rtmp_header_t h, lh;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_chain_t *out, in;
ngx_buf_t in_buf;
ssize_t n;
uint32_t buflen, end_timestamp, size;
s = e->data;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
if (ctx == NULL) {
return;
}
if (ctx->offset == -1) {
ctx->offset = ngx_rtmp_play_timestamp_to_offset(s,
ctx->start_timestamp);
ctx->start_timestamp = -1; /* set later from actual timestamp */
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: read tag at offset=%i", ctx->offset);
/* read tag header */
n = ngx_read_file(&ctx->file, ngx_rtmp_play_header,
sizeof(ngx_rtmp_play_header), ctx->offset);
if (n != sizeof(ngx_rtmp_play_header)) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"play: could not read flv tag header");
ngx_rtmp_send_user_stream_eof(s, 1);
return;
}
/* parse header fields */
ngx_memzero(&h, sizeof(h));
h.msid = NGX_RTMP_LIVE_MSID;
h.type = ngx_rtmp_play_header[0];
size = 0;
ngx_rtmp_rmemcpy(&size, ngx_rtmp_play_header + 1, 3);
ngx_rtmp_rmemcpy(&h.timestamp, ngx_rtmp_play_header + 4, 3);
((u_char *) &h.timestamp)[3] = ngx_rtmp_play_header[7];
ctx->offset += (sizeof(ngx_rtmp_play_header) + size + 4);
last_timestamp = 0;
switch (h.type) {
case NGX_RTMP_MSG_AUDIO:
h.csid = NGX_RTMP_LIVE_CSID_AUDIO;
last_timestamp = ctx->last_audio;
ctx->last_audio = h.timestamp;
break;
case NGX_RTMP_MSG_VIDEO:
h.csid = NGX_RTMP_LIVE_CSID_VIDEO;
last_timestamp = ctx->last_video;
ctx->last_video = h.timestamp;
break;
default:
goto skip;
}
ngx_log_debug4(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: read tag type=%i size=%uD timestamp=%uD "
"last_timestamp=%uD",
(ngx_int_t) h.type,size, h.timestamp, last_timestamp);
lh = h;
lh.timestamp = last_timestamp;
if (size > sizeof(ngx_rtmp_play_buffer)) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"play: too big message: %D>%uz", size,
sizeof(ngx_rtmp_play_buffer));
goto next;
}
/* read tag body */
n = ngx_read_file(&ctx->file, ngx_rtmp_play_buffer, size,
ctx->offset - size - 4);
if (n != (ssize_t) size) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"play: could not read flv tag");
return;
}
/* prepare input chain */
ngx_memzero(&in, sizeof(in));
ngx_memzero(&in_buf, sizeof(in_buf));
in.buf = &in_buf;
in_buf.pos = ngx_rtmp_play_buffer;
in_buf.last = ngx_rtmp_play_buffer + size;
/* output chain */
out = ngx_rtmp_append_shared_bufs(cscf, NULL, &in);
ngx_rtmp_prepare_message(s, &h, ctx->msg_mask & (1 << h.type) ?
&lh : NULL, out);
ngx_rtmp_send_message(s, out, 0); /* TODO: priority */
ngx_rtmp_free_shared_chain(cscf, out);
ctx->msg_mask |= (1 << h.type);
next:
if (ctx->start_timestamp == -1) {
ctx->start_timestamp = h.timestamp;
ctx->epoch = ngx_current_msec;
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: start_timestamp=%i", ctx->start_timestamp);
goto skip;
}
buflen = (s->buflen ? s->buflen : NGX_RTMP_PLAY_DEFAULT_BUFLEN);
end_timestamp = (ngx_current_msec - ctx->epoch) +
ctx->start_timestamp + buflen;
ngx_log_debug5(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: %s wait=%D timestamp=%D end_timestamp=%D bufen=%i",
h.timestamp > end_timestamp ? "schedule" : "advance",
h.timestamp > end_timestamp ? h.timestamp - end_timestamp : 0,
h.timestamp, end_timestamp, (ngx_int_t) buflen);
/* too much data sent; schedule timeout */
if (h.timestamp > end_timestamp) {
ngx_add_timer(e, h.timestamp - end_timestamp);
return;
}
skip:
ngx_post_event(e, &ngx_posted_events);
}
