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commit 06d799ce1a5ca4f49ed244e9886bfbcfc32acf89 Author: Raja Rathour <[email protected]> AuthorDate: Thu Jan 1 13:37:22 2026 +0530 Commit: Guo Yejun <[email protected]> CommitDate: Mon Jan 12 08:53:42 2026 +0800 avfilter/dnn_backend_torch: handle lifecycle of worker thread Initialize async resources in dnn_load_model_th and ensure proper cleanup and thread joining in dnn_free_model_th. Signed-off-by: Raja Rathour <[email protected]> Reviewed-by: Wenbin Chen <[email protected]> Reviewed-by: Guo Yejun <[email protected]> --- libavfilter/dnn/dnn_backend_torch.cpp | 85 ++++++++++++++++++++++++++++------- 1 file changed, 69 insertions(+), 16 deletions(-) diff --git a/libavfilter/dnn/dnn_backend_torch.cpp b/libavfilter/dnn/dnn_backend_torch.cpp index 7c81f0cda2..33809bf983 100644 --- a/libavfilter/dnn/dnn_backend_torch.cpp +++ b/libavfilter/dnn/dnn_backend_torch.cpp @@ -127,27 +127,70 @@ static void dnn_free_model_th(DNNModel **model) if (!model || !*model) return; - th_model = (THModel *) (*model); - while (ff_safe_queue_size(th_model->request_queue) != 0) { - THRequestItem *item = (THRequestItem *)ff_safe_queue_pop_front(th_model->request_queue); - destroy_request_item(&item); + th_model = (THModel *)(*model); + + /* 1. Stop and join the worker thread if it exists */ + if (th_model->worker_thread) { + { + std::lock_guard<std::mutex> lock(*th_model->mutex); + th_model->worker_stop = true; + } + th_model->cond->notify_all(); + th_model->worker_thread->join(); + delete th_model->worker_thread; + th_model->worker_thread = NULL; } - ff_safe_queue_destroy(th_model->request_queue); - while (ff_queue_size(th_model->lltask_queue) != 0) { - LastLevelTaskItem *item = (LastLevelTaskItem *)ff_queue_pop_front(th_model->lltask_queue); - av_freep(&item); + /* 2. Safely delete C++ synchronization objects */ + if (th_model->mutex) { + delete th_model->mutex; + th_model->mutex = NULL; + } + if (th_model->cond) { + delete th_model->cond; + th_model->cond = NULL; } - ff_queue_destroy(th_model->lltask_queue); - while (ff_queue_size(th_model->task_queue) != 0) { - TaskItem *item = (TaskItem *)ff_queue_pop_front(th_model->task_queue); - av_frame_free(&item->in_frame); - av_frame_free(&item->out_frame); - av_freep(&item); + /* 3. Clean up the pending queue */ + if (th_model->pending_queue) { + while (ff_safe_queue_size(th_model->pending_queue) > 0) { + THRequestItem *item = (THRequestItem *)ff_safe_queue_pop_front(th_model->pending_queue); + destroy_request_item(&item); + } + ff_safe_queue_destroy(th_model->pending_queue); + } + + /* 4. Clean up standard backend queues */ + if (th_model->request_queue) { + while (ff_safe_queue_size(th_model->request_queue) != 0) { + THRequestItem *item = (THRequestItem *)ff_safe_queue_pop_front(th_model->request_queue); + destroy_request_item(&item); + } + ff_safe_queue_destroy(th_model->request_queue); } - ff_queue_destroy(th_model->task_queue); - delete th_model->jit_model; + + if (th_model->lltask_queue) { + while (ff_queue_size(th_model->lltask_queue) != 0) { + LastLevelTaskItem *item = (LastLevelTaskItem *)ff_queue_pop_front(th_model->lltask_queue); + av_freep(&item); + } + ff_queue_destroy(th_model->lltask_queue); + } + + if (th_model->task_queue) { + while (ff_queue_size(th_model->task_queue) != 0) { + TaskItem *item = (TaskItem *)ff_queue_pop_front(th_model->task_queue); + av_frame_free(&item->in_frame); + av_frame_free(&item->out_frame); + av_freep(&item); + } + ff_queue_destroy(th_model->task_queue); + } + + /* 5. Final model cleanup */ + if (th_model->jit_model) + delete th_model->jit_model; + av_freep(&th_model); *model = NULL; } @@ -513,6 +556,16 @@ static DNNModel *dnn_load_model_th(DnnContext *ctx, DNNFunctionType func_type, A goto fail; } + th_model->pending_queue = ff_safe_queue_create(); + if (!th_model->pending_queue) { + goto fail; + } + + th_model->mutex = new std::mutex(); + th_model->cond = new std::condition_variable(); + th_model->worker_stop = false; + th_model->worker_thread = new std::thread(th_worker_thread, th_model); + model->get_input = &get_input_th; model->get_output = &get_output_th; model->filter_ctx = filter_ctx; _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
