mirror of https://git.videolan.org/git/ffmpeg.git
130 lines
4.1 KiB
C
130 lines
4.1 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/mem.h"
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#include "avdevice.h"
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#include "internal.h"
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#include "libavformat/demux.h"
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#include "libavformat/mux.h"
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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 || !ffofmt(s->oformat)->control_message)
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return AVERROR(ENOSYS);
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return ffofmt(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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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 && !ffofmt(s->oformat)->get_device_list) ||
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(s->iformat && !ffifmt(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 = ffofmt(s->oformat)->get_device_list(s, *device_list);
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else
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ret = ffifmt(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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return (*device_list)->nb_devices;
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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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