| /* |
| * 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/avassert.h" |
| #include "libavutil/mem.h" |
| #include "avdevice.h" |
| #include "internal.h" |
| #include "libavformat/demux.h" |
| #include "libavformat/mux.h" |
| |
| int avdevice_app_to_dev_control_message(struct AVFormatContext *s, enum AVAppToDevMessageType type, |
| void *data, size_t data_size) |
| { |
| if (!s->oformat || !ffofmt(s->oformat)->control_message) |
| return AVERROR(ENOSYS); |
| return ffofmt(s->oformat)->control_message(s, type, data, data_size); |
| } |
| |
| int avdevice_dev_to_app_control_message(struct AVFormatContext *s, enum AVDevToAppMessageType type, |
| void *data, size_t data_size) |
| { |
| if (!s->control_message_cb) |
| return AVERROR(ENOSYS); |
| return s->control_message_cb(s, type, data, data_size); |
| } |
| |
| int avdevice_list_devices(AVFormatContext *s, AVDeviceInfoList **device_list) |
| { |
| int ret; |
| av_assert0(s); |
| av_assert0(device_list); |
| av_assert0(s->oformat || s->iformat); |
| if ((s->oformat && !ffofmt(s->oformat)->get_device_list) || |
| (s->iformat && !ffifmt(s->iformat)->get_device_list)) { |
| *device_list = NULL; |
| return AVERROR(ENOSYS); |
| } |
| *device_list = av_mallocz(sizeof(AVDeviceInfoList)); |
| if (!(*device_list)) |
| return AVERROR(ENOMEM); |
| /* no default device by default */ |
| (*device_list)->default_device = -1; |
| if (s->oformat) |
| ret = ffofmt(s->oformat)->get_device_list(s, *device_list); |
| else |
| ret = ffifmt(s->iformat)->get_device_list(s, *device_list); |
| if (ret < 0) { |
| avdevice_free_list_devices(device_list); |
| return ret; |
| } |
| return (*device_list)->nb_devices; |
| } |
| |
| static int list_devices_for_context(AVFormatContext *s, AVDictionary *options, |
| AVDeviceInfoList **device_list) |
| { |
| AVDictionary *tmp = NULL; |
| int ret; |
| |
| av_dict_copy(&tmp, options, 0); |
| if ((ret = av_opt_set_dict2(s, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0) |
| goto fail; |
| ret = avdevice_list_devices(s, device_list); |
| fail: |
| av_dict_free(&tmp); |
| avformat_free_context(s); |
| return ret; |
| } |
| |
| int avdevice_list_input_sources(const AVInputFormat *device, const char *device_name, |
| AVDictionary *device_options, AVDeviceInfoList **device_list) |
| { |
| AVFormatContext *s = NULL; |
| int ret; |
| |
| if ((ret = ff_alloc_input_device_context(&s, device, device_name)) < 0) |
| return ret; |
| return list_devices_for_context(s, device_options, device_list); |
| } |
| |
| int avdevice_list_output_sinks(const AVOutputFormat *device, const char *device_name, |
| AVDictionary *device_options, AVDeviceInfoList **device_list) |
| { |
| AVFormatContext *s = NULL; |
| int ret; |
| |
| if ((ret = avformat_alloc_output_context2(&s, device, device_name, NULL)) < 0) |
| return ret; |
| return list_devices_for_context(s, device_options, device_list); |
| } |
| |
| void avdevice_free_list_devices(AVDeviceInfoList **device_list) |
| { |
| AVDeviceInfoList *list; |
| AVDeviceInfo *dev; |
| int i; |
| |
| av_assert0(device_list); |
| list = *device_list; |
| if (!list) |
| return; |
| |
| for (i = 0; i < list->nb_devices; i++) { |
| dev = list->devices[i]; |
| if (dev) { |
| av_freep(&dev->device_name); |
| av_freep(&dev->device_description); |
| av_freep(&dev->media_types); |
| av_free(dev); |
| } |
| } |
| av_freep(&list->devices); |
| av_freep(device_list); |
| } |