1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/*
* Copyright 2012 Stefano Sabatini <stefasab gmail com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/imgutils.h"
#include "lavfutils.h"
int ff_load_image(uint8_t *data[4], int linesize[4],
int *w, int *h, enum AVPixelFormat *pix_fmt,
const char *filename, void *log_ctx)
{
AVInputFormat *iformat = NULL;
AVFormatContext *format_ctx = NULL;
AVCodec *codec;
AVCodecContext *codec_ctx;
AVCodecParameters *par;
AVFrame *frame;
int frame_decoded, ret = 0;
AVPacket pkt;
AVDictionary *opt=NULL;
av_init_packet(&pkt);
iformat = av_find_input_format("image2pipe");
if ((ret = avformat_open_input(&format_ctx, filename, iformat, NULL)) < 0) {
av_log(log_ctx, AV_LOG_ERROR,
"Failed to open input file '%s'\n", filename);
return ret;
}
if ((ret = avformat_find_stream_info(format_ctx, NULL)) < 0) {
av_log(log_ctx, AV_LOG_ERROR, "Find stream info failed\n");
return ret;
}
par = format_ctx->streams[0]->codecpar;
codec = avcodec_find_decoder(par->codec_id);
if (!codec) {
av_log(log_ctx, AV_LOG_ERROR, "Failed to find codec\n");
ret = AVERROR(EINVAL);
goto end;
}
codec_ctx = avcodec_alloc_context3(codec);
if (!codec_ctx) {
av_log(log_ctx, AV_LOG_ERROR, "Failed to alloc video decoder context\n");
ret = AVERROR(ENOMEM);
goto end;
}
ret = avcodec_parameters_to_context(codec_ctx, par);
if (ret < 0) {
av_log(log_ctx, AV_LOG_ERROR, "Failed to copy codec parameters to decoder context\n");
goto end;
}
av_dict_set(&opt, "thread_type", "slice", 0);
if ((ret = avcodec_open2(codec_ctx, codec, &opt)) < 0) {
av_log(log_ctx, AV_LOG_ERROR, "Failed to open codec\n");
goto end;
}
if (!(frame = av_frame_alloc()) ) {
av_log(log_ctx, AV_LOG_ERROR, "Failed to alloc frame\n");
ret = AVERROR(ENOMEM);
goto end;
}
ret = av_read_frame(format_ctx, &pkt);
if (ret < 0) {
av_log(log_ctx, AV_LOG_ERROR, "Failed to read frame from file\n");
goto end;
}
ret = avcodec_decode_video2(codec_ctx, frame, &frame_decoded, &pkt);
if (ret < 0 || !frame_decoded) {
av_log(log_ctx, AV_LOG_ERROR, "Failed to decode image from file\n");
if (ret >= 0)
ret = -1;
goto end;
}
*w = frame->width;
*h = frame->height;
*pix_fmt = frame->format;
if ((ret = av_image_alloc(data, linesize, *w, *h, *pix_fmt, 16)) < 0)
goto end;
ret = 0;
av_image_copy(data, linesize, (const uint8_t **)frame->data, frame->linesize, *pix_fmt, *w, *h);
end:
av_packet_unref(&pkt);
avcodec_free_context(&codec_ctx);
avformat_close_input(&format_ctx);
av_frame_free(&frame);
av_dict_free(&opt);
if (ret < 0)
av_log(log_ctx, AV_LOG_ERROR, "Error loading image file '%s'\n", filename);
return ret;
}
|
