FFmpeg
dnn_backend_native_layer_maximum.c
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1 /*
2  * Copyright (c) 2019 Guo Yejun
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * DNN native backend implementation.
24  */
25 
26 #include "dnn_backend_native.h"
27 #include "libavutil/avassert.h"
29 
30 int ff_dnn_load_layer_maximum(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
31 {
32  DnnLayerMaximumParams *params;
33  int dnn_size = 0;
34  params = av_malloc(sizeof(*params));
35  if (!params)
36  return 0;
37 
38  params->val.u32 = avio_rl32(model_file_context);
39  dnn_size += 4;
40  layer->params = params;
41  layer->input_operand_indexes[0] = (int32_t)avio_rl32(model_file_context);
42  layer->output_operand_index = (int32_t)avio_rl32(model_file_context);
43  dnn_size += 8;
44 
45  if (layer->input_operand_indexes[0] >= operands_num || layer->output_operand_index >= operands_num) {
46  return 0;
47  }
48 
49  return dnn_size;
50 }
51 
52 int ff_dnn_execute_layer_maximum(DnnOperand *operands, const int32_t *input_operand_indexes,
53  int32_t output_operand_index, const void *parameters, NativeContext *ctx)
54 {
55  const DnnOperand *input = &operands[input_operand_indexes[0]];
56  DnnOperand *output = &operands[output_operand_index];
57  const DnnLayerMaximumParams *params = parameters;
58  int dims_count;
59  const float *src;
60  float *dst;
61 
62  for (int i = 0; i < 4; ++i)
63  output->dims[i] = input->dims[i];
64 
65  output->data_type = input->data_type;
67  if (output->length <= 0) {
68  av_log(ctx, AV_LOG_ERROR, "The output data length overflow\n");
69  return DNN_ERROR;
70  }
71  output->data = av_realloc(output->data, output->length);
72  if (!output->data) {
73  av_log(ctx, AV_LOG_ERROR, "Failed to reallocate memory for output\n");
74  return DNN_ERROR;
75  }
76 
78  src = input->data;
79  dst = output->data;
80  for (int i = 0; i < dims_count; ++i)
81  dst[i] = FFMAX(src[i], params->val.y);
82 
83  return 0;
84 }
output
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
Definition: filter_design.txt:225
DnnLayerMaximumParams::y
float y
Definition: dnn_backend_native_layer_maximum.h:36
DnnLayerMaximumParams
Definition: dnn_backend_native_layer_maximum.h:33
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
DnnLayerMaximumParams::u32
uint32_t u32
Definition: dnn_backend_native_layer_maximum.h:35
ff_calculate_operand_data_length
int32_t ff_calculate_operand_data_length(const DnnOperand *oprd)
Definition: dnn_backend_native.c:398
ff_dnn_execute_layer_maximum
int ff_dnn_execute_layer_maximum(DnnOperand *operands, const int32_t *input_operand_indexes, int32_t output_operand_index, const void *parameters, NativeContext *ctx)
Definition: dnn_backend_native_layer_maximum.c:52
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:181
DnnLayerMaximumParams::val
union DnnLayerMaximumParams::@202 val
ctx
AVFormatContext * ctx
Definition: movenc.c:48
Layer::params
void * params
Definition: dnn_backend_native.h:65
src
#define src
Definition: vp8dsp.c:255
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:733
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
Layer::output_operand_index
int32_t output_operand_index
Definition: dnn_backend_native.h:64
NativeContext
Definition: dnn_backend_native.h:116
ff_dnn_load_layer_maximum
int ff_dnn_load_layer_maximum(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
Definition: dnn_backend_native_layer_maximum.c:30
Layer
Definition: dnn_backend_native.h:56
Layer::input_operand_indexes
int32_t input_operand_indexes[4]
a layer can have multiple inputs and one output.
Definition: dnn_backend_native.h:63
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
dnn_backend_native.h
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
av_realloc
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
i
int i
Definition: input.c:407
DNN_ERROR
@ DNN_ERROR
Definition: dnn_interface.h:33
DnnOperand
Definition: dnn_backend_native.h:68
ff_calculate_operand_dims_count
int32_t ff_calculate_operand_dims_count(const DnnOperand *oprd)
Definition: dnn_backend_native.c:389
int32_t
int32_t
Definition: audioconvert.c:56
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
dnn_backend_native_layer_maximum.h