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avdevice.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavutil/avassert.h"
20 #include "avdevice.h"
21 #include "config.h"
22 
23 unsigned avdevice_version(void)
24 {
27 }
28 
29 const char * avdevice_configuration(void)
30 {
31  return FFMPEG_CONFIGURATION;
32 }
33 
34 const char * avdevice_license(void)
35 {
36 #define LICENSE_PREFIX "libavdevice license: "
37  return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
38 }
39 
41  void *data, size_t data_size)
42 {
43  if (!s->oformat || !s->oformat->control_message)
44  return AVERROR(ENOSYS);
45  return s->oformat->control_message(s, type, data, data_size);
46 }
47 
49  void *data, size_t data_size)
50 {
51  if (!s->control_message_cb)
52  return AVERROR(ENOSYS);
53  return s->control_message_cb(s, type, data, data_size);
54 }
55 
57 {
58  av_assert0(s);
59  av_assert0(device_list);
60  av_assert0(s->oformat || s->iformat);
61  if ((s->oformat && !s->oformat->get_device_list) ||
62  (s->iformat && !s->iformat->get_device_list)) {
63  *device_list = NULL;
64  return AVERROR(ENOSYS);
65  }
66  *device_list = av_mallocz(sizeof(AVDeviceInfoList));
67  if (!(*device_list))
68  return AVERROR(ENOMEM);
69  if (s->oformat)
70  return s->oformat->get_device_list(s, *device_list);
71  return s->iformat->get_device_list(s, *device_list);
72 }
73 
75 {
76  AVDeviceInfoList *list;
77  AVDeviceInfo *dev;
78  int i;
79 
80  av_assert0(device_list);
81  list = *device_list;
82  if (!list)
83  return;
84 
85  for (i = 0; i < list->nb_devices; i++) {
86  dev = list->devices[i];
87  if (dev) {
88  av_free(dev->device_name);
90  av_free(dev);
91  }
92  }
93  av_free(list->devices);
94  av_freep(device_list);
95 }