mirror of
https://github.com/zotanmew/nginx-rtmp-module.git
synced 2024-05-16 08:41:08 +02:00
331 lines
9.2 KiB
C
331 lines
9.2 KiB
C
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/*
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* Copyright (c) 2012 Roman Arutyunyan
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*/
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#include "ngx_rtmp_cmd_module.h"
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#include "ngx_rtmp_live_module.h"
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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_play_postconfiguration(ngx_conf_t *cf);
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static void * ngx_rtmp_play_create_app_conf(ngx_conf_t *cf);
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static char * ngx_rtmp_play_merge_app_conf(ngx_conf_t *cf,
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void *parent, void *child);
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typedef struct {
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ngx_str_t root;
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} ngx_rtmp_play_app_conf_t;
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typedef struct {
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ngx_file_t file;
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ngx_uint_t offset;
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ngx_event_t write_evt;
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uint32_t last_audio;
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uint32_t last_video;
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ngx_uint_t msg_mask;
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uint32_t epoch;
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} ngx_rtmp_play_ctx_t;
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#define NGX_RTMP_PLAY_BUFFER (1024*1024)
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#define NGX_RTMP_PLAY_DEFAULT_BUFLEN 1000
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static ngx_command_t ngx_rtmp_play_commands[] = {
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{ ngx_string("play"),
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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_play_app_conf_t, root),
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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_play_module_ctx = {
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NULL, /* preconfiguration */
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ngx_rtmp_play_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_play_create_app_conf, /* create app configuration */
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ngx_rtmp_play_merge_app_conf /* merge app configuration */
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};
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ngx_module_t ngx_rtmp_play_module = {
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NGX_MODULE_V1,
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&ngx_rtmp_play_module_ctx, /* module context */
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ngx_rtmp_play_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_play_create_app_conf(ngx_conf_t *cf)
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{
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ngx_rtmp_play_app_conf_t *pacf;
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pacf = ngx_pcalloc(cf->pool, sizeof(ngx_rtmp_play_app_conf_t));
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if (pacf == NULL) {
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return NULL;
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}
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return pacf;
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}
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static char *
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ngx_rtmp_play_merge_app_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_rtmp_play_app_conf_t *prev = parent;
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ngx_rtmp_play_app_conf_t *conf = child;
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ngx_conf_merge_str_value(conf->root, prev->root, "");
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return NGX_CONF_OK;
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}
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static ngx_int_t
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ngx_rtmp_play_close_stream(ngx_rtmp_session_t *s, ngx_rtmp_close_stream_t *v)
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{
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ngx_rtmp_play_ctx_t *ctx;
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ngx_rtmp_play_app_conf_t *pacf;
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pacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_play_module);
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if (pacf == NULL) {
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goto next;
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}
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
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if (ctx == NULL) {
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goto next;
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}
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if (ctx->file.fd != NGX_INVALID_FILE) {
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ngx_close_file(ctx->file.fd);
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}
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if (ctx->write_evt.timer_set) {
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ngx_del_timer(&ctx->write_evt);
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}
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if (ctx->write_evt.prev) {
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ngx_delete_posted_event((&ctx->write_evt));
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}
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next:
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return next_close_stream(s, v);
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}
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static void
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ngx_rtmp_play_send(ngx_event_t *e)
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{
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ngx_rtmp_session_t *s;
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ngx_rtmp_play_ctx_t *ctx;
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uint8_t type;
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uint32_t size;
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uint32_t timestamp;
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ngx_rtmp_header_t h, lh;
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ngx_rtmp_core_srv_conf_t *cscf;
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ngx_chain_t *out, in;
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ngx_buf_t in_buf;
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ssize_t n;
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uint32_t buflen, end_timestamp;
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static u_char header[11];
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static u_char buffer[NGX_RTMP_PLAY_BUFFER];
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s = e->data;
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cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
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if (ctx == NULL) {
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return;
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}
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n = ngx_read_file(&ctx->file, header, sizeof(header), ctx->offset);
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if (n != sizeof(header)) {
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return;
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}
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ctx->offset += sizeof(header);
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ngx_memzero(&h, sizeof(h));
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type = header[0];
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size = 0;
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ngx_rtmp_rmemcpy(&size, header + 1, 3);
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ngx_rtmp_rmemcpy(×tamp, header + 4, 3);
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((u_char *) ×tamp)[3] = header[7];
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if (type != NGX_RTMP_MSG_AUDIO && type != NGX_RTMP_MSG_VIDEO) {
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/* TODO: make use of metadata */
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ctx->offset += (size + 4);
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return;
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}
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ngx_log_debug4(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"play: type=%i offset=%ui size=%D timestamp=%D",
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type, ctx->offset, size, timestamp);
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h.type = type;
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h.csid = (h.type == NGX_RTMP_MSG_AUDIO
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? NGX_RTMP_LIVE_CSID_AUDIO
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: NGX_RTMP_LIVE_CSID_VIDEO);
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h.msid = NGX_RTMP_LIVE_MSID;
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h.timestamp = timestamp + ctx->epoch;
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ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"play: h.timestamp=%D", h.timestamp);
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lh = h;
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lh.timestamp = (h.type == NGX_RTMP_MSG_AUDIO
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? ctx->last_audio
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: ctx->last_video);
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if (size > sizeof(buffer)) {
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ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
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"play: too big message: %D", size);
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return;
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}
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n = ngx_read_file(&ctx->file, buffer, size, ctx->offset);
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if (n != size) {
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return;
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}
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ctx->offset += (size + 4);
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ngx_memzero(&in, sizeof(in));
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ngx_memzero(&in_buf, sizeof(in_buf));
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in.buf = &in_buf;
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in_buf.pos = buffer;
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in_buf.last = buffer + size;
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out = ngx_rtmp_append_shared_bufs(cscf, NULL, &in);
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ngx_rtmp_prepare_message(s, &h, ctx->msg_mask & (1 << h.type) ?
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&lh : NULL, out);
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ngx_rtmp_send_message(s, out, 0); /* TODO: priority */
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ngx_rtmp_free_shared_chain(cscf, out);
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ctx->msg_mask |= (1 << h.type);
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if (h.type == NGX_RTMP_MSG_AUDIO) {
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ctx->last_audio = h.timestamp;
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} else {
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ctx->last_video = h.timestamp;
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}
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buflen = (s->buflen ? s->buflen : NGX_RTMP_PLAY_DEFAULT_BUFLEN);
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end_timestamp = (ngx_current_msec - s->epoch) + buflen;
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if (h.timestamp < end_timestamp) {
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ngx_post_event(e, &ngx_posted_events);
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return;
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}
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ngx_add_timer(e, h.timestamp - end_timestamp);
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}
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static ngx_int_t
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ngx_rtmp_play_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
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{
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ngx_rtmp_play_app_conf_t *pacf;
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ngx_rtmp_play_ctx_t *ctx;
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u_char *p;
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ngx_event_t *e;
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static u_char path[NGX_MAX_PATH];
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pacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_play_module);
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if (pacf == NULL || pacf->root.len == 0) {
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goto next;
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}
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ngx_log_debug3(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
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"play: play: name='%s' start=%i duration=%i",
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v->name, (ngx_int_t) v->start, (ngx_int_t) v->duration);
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ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
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if (ctx && (ctx->file.fd != NGX_INVALID_FILE
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|| ctx->write_evt.timer_set))
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{
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ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
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"play: already playing");
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goto next;
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}
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if (ctx == NULL) {
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ctx = ngx_palloc(s->connection->pool, sizeof(ngx_rtmp_play_ctx_t));
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ngx_rtmp_set_ctx(s, ctx, ngx_rtmp_play_module);
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}
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ngx_memzero(ctx, sizeof(*ctx));
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ctx->file.log = s->connection->log;
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/*TODO: escape*/
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p = ngx_snprintf(path, sizeof(path), "%V/%s", &pacf->root, v->name);
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*p = 0;
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ctx->file.fd = ngx_open_file(path, NGX_FILE_RDONLY, NGX_FILE_OPEN,
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NGX_FILE_DEFAULT_ACCESS);
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if (ctx->file.fd == NGX_INVALID_FILE) {
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ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
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"play: error opening file %s", path);
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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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"play: opened file '%s'", path);
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ctx->offset = 13; /* header 9 bytes + zero tag 4 bytes */
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ctx->epoch = ngx_current_msec - s->epoch;
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e = &ctx->write_evt;
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e->data = s;
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e->handler = ngx_rtmp_play_send;
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e->log = s->connection->log;
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ngx_post_event(e, &ngx_posted_events)
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next:
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return next_play(s, v);
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}
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static ngx_int_t
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ngx_rtmp_play_postconfiguration(ngx_conf_t *cf)
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{
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next_play = ngx_rtmp_play;
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ngx_rtmp_play = ngx_rtmp_play_play;
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next_close_stream = ngx_rtmp_close_stream;
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ngx_rtmp_close_stream = ngx_rtmp_play_close_stream;
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return NGX_OK;
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}
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