zotan/nginx-mod-rtmp
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implemented unindexed vod feature

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This commit is contained in:
Roman Arutyunyan 2012-07-05 00:18:38 +04:00
parent 0d2672938f
commit 52c23332e5
1 changed files with 149 additions and 37 deletions
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186
ngx_rtmp_play_module.c
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@ -9,16 +9,19 @@
static ngx_rtmp_play_pt next_play;
static ngx_rtmp_close_stream_pt next_close_stream;
static ngx_rtmp_seek_pt next_seek;
static ngx_int_t ngx_rtmp_play_postconfiguration(ngx_conf_t *cf);
static void * ngx_rtmp_play_create_app_conf(ngx_conf_t *cf);
static char * ngx_rtmp_play_merge_app_conf(ngx_conf_t *cf,
void *parent, void *child);
static void ngx_rtmp_play_send(ngx_event_t *e);
typedef struct {
ngx_str_t root;
ngx_flag_t seek;
} ngx_rtmp_play_app_conf_t;
@ -30,6 +33,9 @@ typedef struct {
uint32_t last_video;
ngx_uint_t msg_mask;
uint32_t epoch;
uint32_t start_timestamp;
unsigned meta_seeking:1;
unsigned key_seeking:1;
} ngx_rtmp_play_ctx_t;
@ -46,6 +52,13 @@ static ngx_command_t ngx_rtmp_play_commands[] = {
offsetof(ngx_rtmp_play_app_conf_t, root),
NULL },
{ ngx_string("seek"),
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_play_app_conf_t, seek),
NULL },
ngx_null_command
};
@ -88,6 +101,8 @@ ngx_rtmp_play_create_app_conf(ngx_conf_t *cf)
return NULL;
}
pacf->seek = NGX_CONF_UNSET;
return pacf;
}
@ -99,6 +114,7 @@ ngx_rtmp_play_merge_app_conf(ngx_conf_t *cf, void *parent, void *child)
ngx_rtmp_play_app_conf_t *conf = child;
ngx_conf_merge_str_value(conf->root, prev->root, "");
ngx_conf_merge_value(conf->seek, prev->seek, 1);
return NGX_CONF_OK;
}
@ -137,6 +153,70 @@ next:
}
static ngx_int_t
ngx_rtmp_play_restart(ngx_rtmp_session_t *s, uint32_t offset)
{
ngx_rtmp_play_ctx_t *ctx;
ngx_rtmp_play_app_conf_t *pacf;
pacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_play_module);
if (pacf == NULL) {
return NGX_OK;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
if (ctx == NULL) {
return NGX_OK;
}
if (ctx->write_evt.timer_set) {
ngx_del_timer(&ctx->write_evt);
}
if (ctx->write_evt.prev) {
ngx_delete_posted_event((&ctx->write_evt));
}
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: starting at offset=%D", offset);
ctx->offset = 13; /* header + zero tag size */
ctx->epoch = ngx_current_msec - s->epoch;
ctx->start_timestamp = offset;
ctx->msg_mask = 0;
if (offset) {
ctx->key_seeking = 1;
}
ngx_post_event((&ctx->write_evt), &ngx_posted_events)
return NGX_OK;
}
static ngx_int_t
ngx_rtmp_play_seek(ngx_rtmp_session_t *s, ngx_rtmp_seek_t *v)
{
ngx_rtmp_play_ctx_t *ctx;
ngx_rtmp_play_app_conf_t *pacf;
pacf = ngx_rtmp_get_module_app_conf(s, ngx_rtmp_play_module);
if (pacf == NULL) {
goto next;
}
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_play_module);
if (ctx == NULL) {
goto next;
}
ngx_rtmp_play_restart(s, v->offset);
next:
return next_seek(s, v);
}
static void
ngx_rtmp_play_send(ngx_event_t *e)
{
@ -144,7 +224,7 @@ ngx_rtmp_play_send(ngx_event_t *e)
ngx_rtmp_play_ctx_t *ctx;
uint8_t type;
uint32_t size;
uint32_t timestamp;
uint32_t timestamp, last_timestamp;
ngx_rtmp_header_t h, lh;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_chain_t *out, in;
@ -171,8 +251,6 @@ ngx_rtmp_play_send(ngx_event_t *e)
ctx->offset += sizeof(header);
ngx_memzero(&h, sizeof(h));
type = header[0];
size = 0;
@ -181,35 +259,57 @@ ngx_rtmp_play_send(ngx_event_t *e)
ngx_rtmp_rmemcpy(&timestamp, header + 4, 3);
((u_char *) &timestamp)[3] = header[7];
if (type != NGX_RTMP_MSG_AUDIO && type != NGX_RTMP_MSG_VIDEO) {
/* TODO: make use of metadata */
ctx->offset += (size + 4);
return;
if (ctx->meta_seeking) {
if (type != NGX_RTMP_MSG_AMF_META) {
goto skip;
}
} else {
if (type != NGX_RTMP_MSG_AUDIO && type != NGX_RTMP_MSG_VIDEO) {
goto skip;
}
if (ctx->start_timestamp && timestamp < ctx->start_timestamp) {
goto skip;
}
}
ngx_log_debug4(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: type=%i offset=%ui size=%D timestamp=%D",
type, ctx->offset, size, timestamp);
h.type = type;
h.csid = (h.type == NGX_RTMP_MSG_AUDIO
? NGX_RTMP_LIVE_CSID_AUDIO
: NGX_RTMP_LIVE_CSID_VIDEO);
h.msid = NGX_RTMP_LIVE_MSID;
h.timestamp = timestamp + ctx->epoch;
ngx_memzero(&h, sizeof(h));
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: h.timestamp=%D", h.timestamp);
h.type = type;
h.msid = NGX_RTMP_LIVE_MSID;
h.timestamp = timestamp;
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;
case NGX_RTMP_MSG_AMF_META:
h.csid = NGX_RTMP_LIVE_CSID_META;
h.timestamp = 0;
last_timestamp = 0;
break;
}
lh = h;
lh.timestamp = (h.type == NGX_RTMP_MSG_AUDIO
? ctx->last_audio
: ctx->last_video);
lh.timestamp = last_timestamp;
if (size > sizeof(buffer)) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"play: too big message: %D", size);
return;
"play: too big message: %D>%uz", size, sizeof(buffer));
goto next;
}
n = ngx_read_file(&ctx->file, buffer, size, ctx->offset);
@ -217,7 +317,13 @@ ngx_rtmp_play_send(ngx_event_t *e)
return;
}
ctx->offset += (size + 4);
if (ctx->key_seeking
&& !(h.type == NGX_RTMP_MSG_VIDEO && size &&
(buffer[0] & 0xf0) >> 4 == 1))
{
goto skip;
}
ctx->key_seeking = 0;
ngx_memzero(&in, sizeof(in));
ngx_memzero(&in_buf, sizeof(in_buf));
@ -233,21 +339,25 @@ ngx_rtmp_play_send(ngx_event_t *e)
ngx_rtmp_free_shared_chain(cscf, out);
ctx->msg_mask |= (1 << h.type);
if (h.type == NGX_RTMP_MSG_AUDIO) {
ctx->last_audio = h.timestamp;
} else {
ctx->last_video = h.timestamp;
}
buflen = (s->buflen ? s->buflen : NGX_RTMP_PLAY_DEFAULT_BUFLEN);
end_timestamp = (ngx_current_msec - s->epoch) + buflen;
if (h.timestamp < end_timestamp) {
ngx_post_event(e, &ngx_posted_events);
if (ctx->meta_seeking) {
ctx->meta_seeking = 0;
ngx_rtmp_play_restart(s, ctx->start_timestamp);
return;
}
ngx_add_timer(e, h.timestamp - end_timestamp);
next:
buflen = (s->buflen ? s->buflen : NGX_RTMP_PLAY_DEFAULT_BUFLEN);
end_timestamp = (ngx_current_msec - s->epoch) + buflen;
if (h.timestamp > end_timestamp) {
ctx->offset += (size + 4);
ngx_add_timer(e, h.timestamp - end_timestamp);
return;
}
skip:
ctx->offset += (size + 4);
ngx_post_event(e, &ngx_posted_events);
}
@ -302,15 +412,14 @@ ngx_rtmp_play_play(ngx_rtmp_session_t *s, ngx_rtmp_play_t *v)
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"play: opened file '%s'", path);
ctx->offset = 13; /* header 9 bytes + zero tag 4 bytes */
ctx->epoch = ngx_current_msec - s->epoch;
e = &ctx->write_evt;
e->data = s;
e->handler = ngx_rtmp_play_send;
e->log = s->connection->log;
ngx_post_event(e, &ngx_posted_events)
ctx->meta_seeking = pacf->seek;
ngx_rtmp_play_restart(s, v->start);
next:
return next_play(s, v);
@ -326,5 +435,8 @@ ngx_rtmp_play_postconfiguration(ngx_conf_t *cf)
next_close_stream = ngx_rtmp_close_stream;
ngx_rtmp_close_stream = ngx_rtmp_play_close_stream;
next_seek = ngx_rtmp_seek;
ngx_rtmp_seek = ngx_rtmp_play_seek;
return NGX_OK;
}