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/*
* 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 "avdevice.h"
#include "config.h"
unsigned avdevice_version(void)
{
av_assert0(LIBAVDEVICE_VERSION_MICRO >= 100);
return LIBAVDEVICE_VERSION_INT;
}
const char * avdevice_configuration(void)
{
return FFMPEG_CONFIGURATION;
}
const char * avdevice_license(void)
{
#define LICENSE_PREFIX "libavdevice license: "
return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
}
static void *av_device_next(void *prev, int output,
AVClassCategory c1, AVClassCategory c2)
{
const AVClass *pc;
AVClassCategory category = AV_CLASS_CATEGORY_NA;
do {
if (output) {
if (!(prev = av_oformat_next(prev)))
break;
pc = ((AVOutputFormat *)prev)->priv_class;
} else {
if (!(prev = av_iformat_next(prev)))
break;
pc = ((AVInputFormat *)prev)->priv_class;
}
if (!pc)
continue;
category = pc->category;
} while (category != c1 && category != c2);
return prev;
}
AVInputFormat *av_input_audio_device_next(AVInputFormat *d)
{
return av_device_next(d, 0, AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT,
AV_CLASS_CATEGORY_DEVICE_INPUT);
}
AVInputFormat *av_input_video_device_next(AVInputFormat *d)
{
return av_device_next(d, 0, AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
AV_CLASS_CATEGORY_DEVICE_INPUT);
}
AVOutputFormat *av_output_audio_device_next(AVOutputFormat *d)
{
return av_device_next(d, 1, AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
AV_CLASS_CATEGORY_DEVICE_OUTPUT);
}
AVOutputFormat *av_output_video_device_next(AVOutputFormat *d)
{
return av_device_next(d, 1, AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
AV_CLASS_CATEGORY_DEVICE_OUTPUT);
}
int avdevice_app_to_dev_control_message(struct AVFormatContext *s, enum AVAppToDevMessageType type,
void *data, size_t data_size)
{
if (!s->oformat || !s->oformat->control_message)
return AVERROR(ENOSYS);
return 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 && !s->oformat->get_device_list) ||
(s->iformat && !s->iformat->get_device_list)) {
*device_list = NULL;
return AVERROR(ENOSYS);
}
*device_list = av_mallocz(sizeof(AVDeviceInfoList));
if (!(*device_list))
return AVERROR(ENOMEM);
if (s->oformat)
ret = s->oformat->get_device_list(s, *device_list);
else
ret = s->iformat->get_device_list(s, *device_list);
if (ret < 0)
avdevice_free_list_devices(device_list);
return ret;
}
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_free(dev->device_name);
av_free(dev->device_description);
av_free(dev);
}
}
av_free(list->devices);
av_freep(device_list);
}
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