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"
28 
29 int ff_dnn_load_layer_maximum(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
30 {
31  DnnLayerMaximumParams *params;
32  int dnn_size = 0;
33  params = av_malloc(sizeof(*params));
34  if (!params)
35  return 0;
36 
37  params->val.u32 = avio_rl32(model_file_context);
38  dnn_size += 4;
39  layer->params = params;
40  layer->input_operand_indexes[0] = (int32_t)avio_rl32(model_file_context);
41  layer->output_operand_index = (int32_t)avio_rl32(model_file_context);
42  dnn_size += 8;
43 
44  if (layer->input_operand_indexes[0] >= operands_num || layer->output_operand_index >= operands_num) {
45  return 0;
46  }
47 
48  return dnn_size;
49 }
50 
51 int ff_dnn_execute_layer_maximum(DnnOperand *operands, const int32_t *input_operand_indexes,
52  int32_t output_operand_index, const void *parameters, NativeContext *ctx)
53 {
54  const DnnOperand *input = &operands[input_operand_indexes[0]];
55  DnnOperand *output = &operands[output_operand_index];
56  const DnnLayerMaximumParams *params = parameters;
57  int dims_count;
58  const float *src;
59  float *dst;
60 
61  for (int i = 0; i < 4; ++i)
62  output->dims[i] = input->dims[i];
63 
64  output->data_type = input->data_type;
66  if (output->length <= 0) {
67  av_log(ctx, AV_LOG_ERROR, "The output data length overflow\n");
68  return AVERROR(EINVAL);
69  }
70  output->data = av_realloc(output->data, output->length);
71  if (!output->data) {
72  av_log(ctx, AV_LOG_ERROR, "Failed to reallocate memory for output\n");
73  return AVERROR(ENOMEM);
74  }
75 
77  src = input->data;
78  dst = output->data;
79  for (int i = 0; i < dims_count; ++i)
80  dst[i] = FFMAX(src[i], params->val.y);
81 
82  return 0;
83 }
DnnLayerMaximumParams::val
union DnnLayerMaximumParams::@212 val
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
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
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
DnnLayerMaximumParams
Definition: dnn_backend_native_layer_maximum.h:33
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
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:503
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:51
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
ctx
AVFormatContext * ctx
Definition: movenc.c:48
Layer::params
void * params
Definition: dnn_backend_native.h:66
av_realloc
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:153
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:759
AVIOContext
Bytestream IO Context.
Definition: avio.h:162
Layer::output_operand_index
int32_t output_operand_index
Definition: dnn_backend_native.h:65
NativeContext
Definition: dnn_backend_native.h:118
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:29
Layer
Definition: dnn_backend_native.h:57
Layer::input_operand_indexes
int32_t input_operand_indexes[4]
a layer can have multiple inputs and one output.
Definition: dnn_backend_native.h:64
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
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
DnnOperand
Definition: dnn_backend_native.h:69
ff_calculate_operand_dims_count
int32_t ff_calculate_operand_dims_count(const DnnOperand *oprd)
Definition: dnn_backend_native.c:494
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
int32_t
int32_t
Definition: audioconvert.c:56
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
dnn_backend_native_layer_maximum.h