2 * This file is part of FFmpeg.
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.
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.
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
19 #include "libavutil/avassert.h"
20 #include "libavutil/samplefmt.h"
21 #include "libavutil/pixfmt.h"
22 #include "libavcodec/avcodec.h"
27 #include "libavutil/ffversion.h"
28 const char av_device_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
30 #define E AV_OPT_FLAG_ENCODING_PARAM
31 #define D AV_OPT_FLAG_DECODING_PARAM
32 #define A AV_OPT_FLAG_AUDIO_PARAM
33 #define V AV_OPT_FLAG_VIDEO_PARAM
34 #define OFFSET(x) offsetof(AVDeviceCapabilitiesQuery, x)
36 const AVOption av_device_capabilities[] = {
37 { "codec", "codec", OFFSET(codec), AV_OPT_TYPE_INT,
38 {.i64 = AV_CODEC_ID_NONE}, AV_CODEC_ID_NONE, INT_MAX, E|D|A|V },
39 { "sample_format", "sample format", OFFSET(sample_format), AV_OPT_TYPE_SAMPLE_FMT,
40 {.i64 = AV_SAMPLE_FMT_NONE}, AV_SAMPLE_FMT_NONE, INT_MAX, E|D|A },
41 { "sample_rate", "sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT,
42 {.i64 = -1}, -1, INT_MAX, E|D|A },
43 { "channels", "channels", OFFSET(channels), AV_OPT_TYPE_INT,
44 {.i64 = -1}, -1, INT_MAX, E|D|A },
45 { "channel_layout", "channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT,
46 {.i64 = -1}, -1, INT_MAX, E|D|A },
47 { "pixel_format", "pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT,
48 {.i64 = AV_PIX_FMT_NONE}, AV_PIX_FMT_NONE, INT_MAX, E|D|V },
49 { "window_size", "window size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE,
50 {.str = NULL}, -1, INT_MAX, E|D|V },
51 { "frame_size", "frame size", OFFSET(frame_width), AV_OPT_TYPE_IMAGE_SIZE,
52 {.str = NULL}, -1, INT_MAX, E|D|V },
53 { "fps", "fps", OFFSET(fps), AV_OPT_TYPE_RATIONAL,
54 {.dbl = -1}, -1, INT_MAX, E|D|V },
64 unsigned avdevice_version(void)
66 av_assert0(LIBAVDEVICE_VERSION_MICRO >= 100);
67 return LIBAVDEVICE_VERSION_INT;
70 const char * avdevice_configuration(void)
72 return FFMPEG_CONFIGURATION;
75 const char * avdevice_license(void)
77 #define LICENSE_PREFIX "libavdevice license: "
78 return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
81 int avdevice_app_to_dev_control_message(struct AVFormatContext *s, enum AVAppToDevMessageType type,
82 void *data, size_t data_size)
84 if (!s->oformat || !s->oformat->control_message)
85 return AVERROR(ENOSYS);
86 return s->oformat->control_message(s, type, data, data_size);
89 int avdevice_dev_to_app_control_message(struct AVFormatContext *s, enum AVDevToAppMessageType type,
90 void *data, size_t data_size)
92 if (!s->control_message_cb)
93 return AVERROR(ENOSYS);
94 return s->control_message_cb(s, type, data, data_size);
97 int avdevice_capabilities_create(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s,
98 AVDictionary **device_options)
101 av_assert0(s && caps);
102 av_assert0(s->iformat || s->oformat);
103 if ((s->oformat && !s->oformat->create_device_capabilities) ||
104 (s->iformat && !s->iformat->create_device_capabilities))
105 return AVERROR(ENOSYS);
106 *caps = av_mallocz(sizeof(**caps));
108 return AVERROR(ENOMEM);
109 (*caps)->device_context = s;
110 if (((ret = av_opt_set_dict(s->priv_data, device_options)) < 0))
113 if ((ret = s->iformat->create_device_capabilities(s, *caps)) < 0)
116 if ((ret = s->oformat->create_device_capabilities(s, *caps)) < 0)
119 av_opt_set_defaults(*caps);
126 void avdevice_capabilities_free(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s)
128 if (!s || !caps || !(*caps))
130 av_assert0(s->iformat || s->oformat);
132 if (s->iformat->free_device_capabilities)
133 s->iformat->free_device_capabilities(s, *caps);
135 if (s->oformat->free_device_capabilities)
136 s->oformat->free_device_capabilities(s, *caps);
141 int avdevice_list_devices(AVFormatContext *s, AVDeviceInfoList **device_list)
145 av_assert0(device_list);
146 av_assert0(s->oformat || s->iformat);
147 if ((s->oformat && !s->oformat->get_device_list) ||
148 (s->iformat && !s->iformat->get_device_list)) {
150 return AVERROR(ENOSYS);
152 *device_list = av_mallocz(sizeof(AVDeviceInfoList));
154 return AVERROR(ENOMEM);
155 /* no default device by default */
156 (*device_list)->default_device = -1;
158 ret = s->oformat->get_device_list(s, *device_list);
160 ret = s->iformat->get_device_list(s, *device_list);
162 avdevice_free_list_devices(device_list);
166 static int list_devices_for_context(AVFormatContext *s, AVDictionary *options,
167 AVDeviceInfoList **device_list)
169 AVDictionary *tmp = NULL;
172 av_dict_copy(&tmp, options, 0);
173 if ((ret = av_opt_set_dict2(s, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
175 ret = avdevice_list_devices(s, device_list);
178 avformat_free_context(s);
182 int avdevice_list_input_sources(AVInputFormat *device, const char *device_name,
183 AVDictionary *device_options, AVDeviceInfoList **device_list)
185 AVFormatContext *s = NULL;
188 if ((ret = ff_alloc_input_device_context(&s, device, device_name)) < 0)
190 return list_devices_for_context(s, device_options, device_list);
193 int avdevice_list_output_sinks(AVOutputFormat *device, const char *device_name,
194 AVDictionary *device_options, AVDeviceInfoList **device_list)
196 AVFormatContext *s = NULL;
199 if ((ret = avformat_alloc_output_context2(&s, device, device_name, NULL)) < 0)
201 return list_devices_for_context(s, device_options, device_list);
204 void avdevice_free_list_devices(AVDeviceInfoList **device_list)
206 AVDeviceInfoList *list;
210 av_assert0(device_list);
215 for (i = 0; i < list->nb_devices; i++) {
216 dev = list->devices[i];
218 av_freep(&dev->device_name);
219 av_freep(&dev->device_description);
223 av_freep(&list->devices);
224 av_freep(device_list);