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https://github.com/FFmpeg/FFmpeg.git
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a8a530331f
An avdevice, regardless of whether its category says its an audio or video device, may provide access to devices providing different media types, or even single devices providing multiple media types. Also, some devices may provide no media types. dshow is an example encompassing all of these cases. Users should be provided with this information, so AVDeviceInfo is extended to provide it. Bump avdevice version Signed-off-by: Diederick Niehorster <dcnieho@gmail.com> Reviewed-by: Roger Pack <rogerdpack2@gmail.com>
167 lines
4.9 KiB
C
167 lines
4.9 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/samplefmt.h"
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#include "libavutil/pixfmt.h"
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#include "avdevice.h"
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#include "internal.h"
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#include "config.h"
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#include "libavutil/ffversion.h"
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const char av_device_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
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#if FF_API_DEVICE_CAPABILITIES
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const AVOption av_device_capabilities[] = {
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{ NULL }
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};
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#endif
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unsigned avdevice_version(void)
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{
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av_assert0(LIBAVDEVICE_VERSION_MICRO >= 100);
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return LIBAVDEVICE_VERSION_INT;
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}
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const char * avdevice_configuration(void)
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{
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return FFMPEG_CONFIGURATION;
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}
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const char * avdevice_license(void)
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{
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#define LICENSE_PREFIX "libavdevice license: "
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return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
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}
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int avdevice_app_to_dev_control_message(struct AVFormatContext *s, enum AVAppToDevMessageType type,
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void *data, size_t data_size)
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{
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if (!s->oformat || !s->oformat->control_message)
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return AVERROR(ENOSYS);
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return s->oformat->control_message(s, type, data, data_size);
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}
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int avdevice_dev_to_app_control_message(struct AVFormatContext *s, enum AVDevToAppMessageType type,
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void *data, size_t data_size)
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{
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if (!s->control_message_cb)
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return AVERROR(ENOSYS);
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return s->control_message_cb(s, type, data, data_size);
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}
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#if FF_API_DEVICE_CAPABILITIES
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int avdevice_capabilities_create(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s,
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AVDictionary **device_options)
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{
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return AVERROR(ENOSYS);
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}
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void avdevice_capabilities_free(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s)
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{
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return;
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}
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#endif
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int avdevice_list_devices(AVFormatContext *s, AVDeviceInfoList **device_list)
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{
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int ret;
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av_assert0(s);
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av_assert0(device_list);
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av_assert0(s->oformat || s->iformat);
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if ((s->oformat && !s->oformat->get_device_list) ||
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(s->iformat && !s->iformat->get_device_list)) {
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*device_list = NULL;
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return AVERROR(ENOSYS);
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}
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*device_list = av_mallocz(sizeof(AVDeviceInfoList));
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if (!(*device_list))
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return AVERROR(ENOMEM);
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/* no default device by default */
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(*device_list)->default_device = -1;
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if (s->oformat)
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ret = s->oformat->get_device_list(s, *device_list);
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else
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ret = s->iformat->get_device_list(s, *device_list);
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if (ret < 0)
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avdevice_free_list_devices(device_list);
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return ret;
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}
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static int list_devices_for_context(AVFormatContext *s, AVDictionary *options,
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AVDeviceInfoList **device_list)
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{
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AVDictionary *tmp = NULL;
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int ret;
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av_dict_copy(&tmp, options, 0);
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if ((ret = av_opt_set_dict2(s, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
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goto fail;
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ret = avdevice_list_devices(s, device_list);
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fail:
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av_dict_free(&tmp);
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avformat_free_context(s);
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return ret;
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}
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int avdevice_list_input_sources(const AVInputFormat *device, const char *device_name,
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AVDictionary *device_options, AVDeviceInfoList **device_list)
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{
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AVFormatContext *s = NULL;
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int ret;
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if ((ret = ff_alloc_input_device_context(&s, device, device_name)) < 0)
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return ret;
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return list_devices_for_context(s, device_options, device_list);
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}
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int avdevice_list_output_sinks(const AVOutputFormat *device, const char *device_name,
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AVDictionary *device_options, AVDeviceInfoList **device_list)
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{
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AVFormatContext *s = NULL;
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int ret;
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if ((ret = avformat_alloc_output_context2(&s, device, device_name, NULL)) < 0)
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return ret;
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return list_devices_for_context(s, device_options, device_list);
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}
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void avdevice_free_list_devices(AVDeviceInfoList **device_list)
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{
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AVDeviceInfoList *list;
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AVDeviceInfo *dev;
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int i;
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av_assert0(device_list);
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list = *device_list;
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if (!list)
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return;
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for (i = 0; i < list->nb_devices; i++) {
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dev = list->devices[i];
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if (dev) {
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av_freep(&dev->device_name);
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av_freep(&dev->device_description);
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av_freep(&dev->media_types);
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av_free(dev);
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}
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}
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av_freep(&list->devices);
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av_freep(device_list);
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}
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