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lavfi/dnn_backend_tf: TFInferRequest Execution and Documentation

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This commit adds a function for execution of TFInferRequest and documentation
for functions related to TFInferRequest.

Signed-off-by: Shubhanshu Saxena <shubhanshu.e01@gmail.com>
This commit is contained in:
Shubhanshu Saxena 2021-08-08 16:25:33 +05:30 committed by Guo Yejun
parent c716578588
commit e6ae8fc18e
1 changed files with 45 additions and 0 deletions
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45
libavfilter/dnn/dnn_backend_tf.c
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@ -95,6 +95,13 @@ static void free_buffer(void *data, size_t length)
av_freep(&data); av_freep(&data);
} }
/**
* Free the contents of TensorFlow inference request.
* It does not free the TFInferRequest instance.
*
* @param request pointer to TFInferRequest instance.
* NULL pointer is allowed.
*/
static void tf_free_request(TFInferRequest *request) static void tf_free_request(TFInferRequest *request)
{ {
if (!request) if (!request)
@ -117,6 +124,12 @@ static void tf_free_request(TFInferRequest *request)
} }
} }
/**
* Create a TensorFlow inference request. All properties
* are initially unallocated and set as NULL.
*
* @return pointer to the allocated TFInferRequest instance.
*/
static TFInferRequest *tf_create_inference_request(void) static TFInferRequest *tf_create_inference_request(void)
{ {
TFInferRequest *infer_request = av_malloc(sizeof(TFInferRequest)); TFInferRequest *infer_request = av_malloc(sizeof(TFInferRequest));
@ -127,6 +140,38 @@ static TFInferRequest *tf_create_inference_request(void)
return infer_request; return infer_request;
} }
/**
* Start synchronous inference for the TensorFlow model.
*
* @param request pointer to the TFRequestItem for inference
* @retval DNN_SUCCESS if execution is successful
* @retval DNN_ERROR if execution fails
*/
static DNNReturnType tf_start_inference(void *args)
{
TFRequestItem *request = args;
TFInferRequest *infer_request = request->infer_request;
InferenceItem *inference = request->inference;
TaskItem *task = inference->task;
TFModel *tf_model = task->model;
if (!request) {
av_log(&tf_model->ctx, AV_LOG_ERROR, "TFRequestItem is NULL\n");
return DNN_ERROR;
}
TF_SessionRun(tf_model->session, NULL,
infer_request->tf_input, &infer_request->input_tensor, 1,
infer_request->tf_outputs, infer_request->output_tensors,
task->nb_output, NULL, 0, NULL,
tf_model->status);
if (TF_GetCode(tf_model->status) != TF_OK) {
av_log(&tf_model->ctx, AV_LOG_ERROR, "%s", TF_Message(tf_model->status));
return DNN_ERROR;
}
return DNN_SUCCESS;
}
static DNNReturnType extract_inference_from_task(TaskItem *task, Queue *inference_queue) static DNNReturnType extract_inference_from_task(TaskItem *task, Queue *inference_queue)
{ {
TFModel *tf_model = task->model; TFModel *tf_model = task->model;