Fix: Remove redundant enabled checks in HLS/DASH cleanup to prevent resource leaks. v6.0.173 v7.0.54 (#4161)

## Problem
HLS and DASH components had redundant `enabled` flag checks in their
`cycle()` and `cleanup_delay()` methods that prevented proper cleanup of
files when components were disabled. This created a race condition
where:

1. Stream stops publishing and HLS/DASH components get disabled
2. `cycle()` returns early without performing disposal operations  
3. `cleanup_delay()` returns 0 instead of configured disposal timeout
4. Source cleanup doesn't wait long enough for file disposal
5. HLS/DASH files remain on disk without proper cleanup

## Root Cause
The `enabled` flag should control processing of **new incoming
streams**, but should NOT prevent **cleanup of existing files** from
previously enabled streams.

## Solution
Remove redundant `enabled` checks from:
- `SrsHls::cycle()` and `SrsDash::cycle()` - Allow disposal logic to run
even when disabled
- `SrsHls::cleanup_delay()` and `SrsDash::cleanup_delay()` - Always
return proper disposal timeout

---------

Co-authored-by: winlin <winlinvip@gmail.com>

trunk/doc/CHANGELOG.md

@@ -7,6 +7,7 @@ The changelog for SRS.
 <a name="v7-changes"></a>
 
 ## SRS 7.0 Changelog
+* v7.0, 2025-08-14, Merge [#4161](https://github.com/ossrs/srs/pull/4161): fix hls & dash segments cleanup. v7.0.54 (#4161)
 * v7.0, 2025-08-13, Merge [#4225](https://github.com/ossrs/srs/pull/4225): issue #4223: remove hls_acodec and hls_vcodec config. v7.0.53 (#4225)
 * v7.0, 2025-08-12, Merge [#4230](https://github.com/ossrs/srs/pull/4230): MP4 DVR: Fix audio/video synchronization issues in WebRTC recordings. v7.0.52 (#4230)
 * v7.0, 2025-08-12, Merge [#4301](https://github.com/ossrs/srs/pull/4301): Valgrind: Return error for unsupported check=new on Valgrind < 3.21. v7.0.52 (#4301)
@@ -67,6 +68,7 @@ The changelog for SRS.
 <a name="v6-changes"></a>
 
 ## SRS 6.0 Changelog
+* v6.0, 2025-08-14, Merge [#4161](https://github.com/ossrs/srs/pull/4161): fix hls & dash segments cleanup. v6.0.173 (#4161)
 * v6.0, 2025-08-12, Merge [#4230](https://github.com/ossrs/srs/pull/4230): MP4 DVR: Fix audio/video synchronization issues in WebRTC recordings. v6.0.172 (#4230)
 * v6.0, 2025-08-11, Merge [#4432](https://github.com/ossrs/srs/pull/4432): AI: HTTP-FLV: Fix heap-use-after-free crash during stream unmount. v6.0.171 (#4432)
 * v6.0, 2025-07-28, Merge [#4245](https://github.com/ossrs/srs/pull/4245): Allow Forward to be configured with Env Var. v6.0.170 (#4245)

trunk/src/app/srs_app_dash.cpp

@@ -703,10 +703,6 @@ srs_error_t SrsDash::cycle()
 {
     srs_error_t err = srs_success;
 
-    if (!enabled) {
-        return err;
-    }
-
     if (last_update_time_ <= 0) {
         last_update_time_ = srs_get_system_time();
     }
@@ -737,10 +733,6 @@ srs_error_t SrsDash::cycle()
 
 srs_utime_t SrsDash::cleanup_delay()
 {
-    if (!enabled) {
-        return 0;
-    }
-
     // We use larger timeout to cleanup the HLS, after disposed it if required.
     return _srs_config->get_dash_dispose(req->vhost) * 1.1;
 }

trunk/src/app/srs_app_hls.cpp

@@ -2320,10 +2320,6 @@ srs_error_t SrsHls::cycle()
 {
     srs_error_t err = srs_success;
 
-    if (!enabled) {
-        return err;
-    }
-
     if (last_update_time <= 0) {
         last_update_time = srs_get_system_time();
     }
@@ -2363,10 +2359,6 @@ srs_error_t SrsHls::cycle()
 
 srs_utime_t SrsHls::cleanup_delay()
 {
-    if (!enabled) {
-        return 0;
-    }
-
     // We use larger timeout to cleanup the HLS, after disposed it if required.
     return _srs_config->get_hls_dispose(req->vhost) * 1.1;
 }

trunk/src/core/srs_core_version6.hpp

@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR 6
 #define VERSION_MINOR 0
-#define VERSION_REVISION 172
+#define VERSION_REVISION 173
 
 #endif

trunk/src/core/srs_core_version7.hpp

@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR 7
 #define VERSION_MINOR 0
-#define VERSION_REVISION 53
+#define VERSION_REVISION 54
 
 #endif