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 "libavutil/samplefmt.h"
21 #include "libavutil/pixfmt.h"
22 #include "libavcodec/avcodec.h"
23 #include "avdevice.h"
24 #include "internal.h"
25 #include "config.h"
26
27 #include "libavutil/ffversion.h"
28 const char av_device_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
29
30 #if FF_API_DEVICE_CAPABILITIES
31 const AVOption av_device_capabilities[] = {
32 { NULL }
33 };
34 #endif
35
avdevice_version(void)36 unsigned avdevice_version(void)
37 {
38 av_assert0(LIBAVDEVICE_VERSION_MICRO >= 100);
39 return LIBAVDEVICE_VERSION_INT;
40 }
41
avdevice_configuration(void)42 const char * avdevice_configuration(void)
43 {
44 return FFMPEG_CONFIGURATION;
45 }
46
avdevice_license(void)47 const char * avdevice_license(void)
48 {
49 #define LICENSE_PREFIX "libavdevice license: "
50 return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
51 }
52
avdevice_app_to_dev_control_message(struct AVFormatContext * s,enum AVAppToDevMessageType type,void * data,size_t data_size)53 int avdevice_app_to_dev_control_message(struct AVFormatContext *s, enum AVAppToDevMessageType type,
54 void *data, size_t data_size)
55 {
56 if (!s->oformat || !s->oformat->control_message)
57 return AVERROR(ENOSYS);
58 return s->oformat->control_message(s, type, data, data_size);
59 }
60
avdevice_dev_to_app_control_message(struct AVFormatContext * s,enum AVDevToAppMessageType type,void * data,size_t data_size)61 int avdevice_dev_to_app_control_message(struct AVFormatContext *s, enum AVDevToAppMessageType type,
62 void *data, size_t data_size)
63 {
64 if (!s->control_message_cb)
65 return AVERROR(ENOSYS);
66 return s->control_message_cb(s, type, data, data_size);
67 }
68
69 #if FF_API_DEVICE_CAPABILITIES
avdevice_capabilities_create(AVDeviceCapabilitiesQuery ** caps,AVFormatContext * s,AVDictionary ** device_options)70 int avdevice_capabilities_create(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s,
71 AVDictionary **device_options)
72 {
73 return AVERROR(ENOSYS);
74 }
75
avdevice_capabilities_free(AVDeviceCapabilitiesQuery ** caps,AVFormatContext * s)76 void avdevice_capabilities_free(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s)
77 {
78 return;
79 }
80 #endif
81
avdevice_list_devices(AVFormatContext * s,AVDeviceInfoList ** device_list)82 int avdevice_list_devices(AVFormatContext *s, AVDeviceInfoList **device_list)
83 {
84 int ret;
85 av_assert0(s);
86 av_assert0(device_list);
87 av_assert0(s->oformat || s->iformat);
88 if ((s->oformat && !s->oformat->get_device_list) ||
89 (s->iformat && !s->iformat->get_device_list)) {
90 *device_list = NULL;
91 return AVERROR(ENOSYS);
92 }
93 *device_list = av_mallocz(sizeof(AVDeviceInfoList));
94 if (!(*device_list))
95 return AVERROR(ENOMEM);
96 /* no default device by default */
97 (*device_list)->default_device = -1;
98 if (s->oformat)
99 ret = s->oformat->get_device_list(s, *device_list);
100 else
101 ret = s->iformat->get_device_list(s, *device_list);
102 if (ret < 0)
103 avdevice_free_list_devices(device_list);
104 return ret;
105 }
106
list_devices_for_context(AVFormatContext * s,AVDictionary * options,AVDeviceInfoList ** device_list)107 static int list_devices_for_context(AVFormatContext *s, AVDictionary *options,
108 AVDeviceInfoList **device_list)
109 {
110 AVDictionary *tmp = NULL;
111 int ret;
112
113 av_dict_copy(&tmp, options, 0);
114 if ((ret = av_opt_set_dict2(s, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
115 goto fail;
116 ret = avdevice_list_devices(s, device_list);
117 fail:
118 av_dict_free(&tmp);
119 avformat_free_context(s);
120 return ret;
121 }
122
avdevice_list_input_sources(AVInputFormat * device,const char * device_name,AVDictionary * device_options,AVDeviceInfoList ** device_list)123 int avdevice_list_input_sources(AVInputFormat *device, const char *device_name,
124 AVDictionary *device_options, AVDeviceInfoList **device_list)
125 {
126 AVFormatContext *s = NULL;
127 int ret;
128
129 if ((ret = ff_alloc_input_device_context(&s, device, device_name)) < 0)
130 return ret;
131 return list_devices_for_context(s, device_options, device_list);
132 }
133
avdevice_list_output_sinks(AVOutputFormat * device,const char * device_name,AVDictionary * device_options,AVDeviceInfoList ** device_list)134 int avdevice_list_output_sinks(AVOutputFormat *device, const char *device_name,
135 AVDictionary *device_options, AVDeviceInfoList **device_list)
136 {
137 AVFormatContext *s = NULL;
138 int ret;
139
140 if ((ret = avformat_alloc_output_context2(&s, device, device_name, NULL)) < 0)
141 return ret;
142 return list_devices_for_context(s, device_options, device_list);
143 }
144
avdevice_free_list_devices(AVDeviceInfoList ** device_list)145 void avdevice_free_list_devices(AVDeviceInfoList **device_list)
146 {
147 AVDeviceInfoList *list;
148 AVDeviceInfo *dev;
149 int i;
150
151 av_assert0(device_list);
152 list = *device_list;
153 if (!list)
154 return;
155
156 for (i = 0; i < list->nb_devices; i++) {
157 dev = list->devices[i];
158 if (dev) {
159 av_freep(&dev->device_name);
160 av_freep(&dev->device_description);
161 av_free(dev);
162 }
163 }
164 av_freep(&list->devices);
165 av_freep(device_list);
166 }
167