272 lines
8.6 KiB
C
272 lines
8.6 KiB
C
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/*
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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 "libavcodec/avcodec.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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#define E AV_OPT_FLAG_ENCODING_PARAM
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#define D AV_OPT_FLAG_DECODING_PARAM
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#define A AV_OPT_FLAG_AUDIO_PARAM
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#define V AV_OPT_FLAG_VIDEO_PARAM
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#define OFFSET(x) offsetof(AVDeviceCapabilitiesQuery, x)
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const AVOption av_device_capabilities[] = {
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{ "codec", "codec", OFFSET(codec), AV_OPT_TYPE_INT,
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{.i64 = AV_CODEC_ID_NONE}, AV_CODEC_ID_NONE, INT_MAX, E|D|A|V },
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{ "sample_format", "sample format", OFFSET(sample_format), AV_OPT_TYPE_SAMPLE_FMT,
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{.i64 = AV_SAMPLE_FMT_NONE}, AV_SAMPLE_FMT_NONE, INT_MAX, E|D|A },
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{ "sample_rate", "sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT,
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{.i64 = -1}, -1, INT_MAX, E|D|A },
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{ "channels", "channels", OFFSET(channels), AV_OPT_TYPE_INT,
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{.i64 = -1}, -1, INT_MAX, E|D|A },
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{ "channel_layout", "channel layout", OFFSET(channel_layout), AV_OPT_TYPE_CHANNEL_LAYOUT,
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{.i64 = -1}, -1, INT_MAX, E|D|A },
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{ "pixel_format", "pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT,
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{.i64 = AV_PIX_FMT_NONE}, AV_PIX_FMT_NONE, INT_MAX, E|D|V },
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{ "window_size", "window size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE,
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{.str = NULL}, -1, INT_MAX, E|D|V },
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{ "frame_size", "frame size", OFFSET(frame_width), AV_OPT_TYPE_IMAGE_SIZE,
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{.str = NULL}, -1, INT_MAX, E|D|V },
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{ "fps", "fps", OFFSET(fps), AV_OPT_TYPE_RATIONAL,
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{.dbl = -1}, -1, INT_MAX, E|D|V },
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{ NULL }
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};
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#undef E
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#undef D
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#undef A
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#undef V
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#undef OFFSET
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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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static void *device_next(void *prev, int output,
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AVClassCategory c1, AVClassCategory c2)
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{
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const AVClass *pc;
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AVClassCategory category = AV_CLASS_CATEGORY_NA;
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do {
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if (output) {
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if (!(prev = av_oformat_next(prev)))
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break;
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pc = ((AVOutputFormat *)prev)->priv_class;
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} else {
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if (!(prev = av_iformat_next(prev)))
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break;
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pc = ((AVInputFormat *)prev)->priv_class;
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}
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if (!pc)
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continue;
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category = pc->category;
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} while (category != c1 && category != c2);
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return prev;
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}
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AVInputFormat *av_input_audio_device_next(AVInputFormat *d)
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{
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return device_next(d, 0, AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT,
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AV_CLASS_CATEGORY_DEVICE_INPUT);
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}
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AVInputFormat *av_input_video_device_next(AVInputFormat *d)
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{
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return device_next(d, 0, AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
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AV_CLASS_CATEGORY_DEVICE_INPUT);
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}
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AVOutputFormat *av_output_audio_device_next(AVOutputFormat *d)
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{
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return device_next(d, 1, AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
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AV_CLASS_CATEGORY_DEVICE_OUTPUT);
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}
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AVOutputFormat *av_output_video_device_next(AVOutputFormat *d)
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{
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return device_next(d, 1, AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
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AV_CLASS_CATEGORY_DEVICE_OUTPUT);
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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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int avdevice_capabilities_create(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s,
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AVDictionary **device_options)
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{
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int ret;
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av_assert0(s && caps);
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av_assert0(s->iformat || s->oformat);
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if ((s->oformat && !s->oformat->create_device_capabilities) ||
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(s->iformat && !s->iformat->create_device_capabilities))
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return AVERROR(ENOSYS);
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*caps = av_mallocz(sizeof(**caps));
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if (!(*caps))
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return AVERROR(ENOMEM);
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(*caps)->device_context = s;
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if (((ret = av_opt_set_dict(s->priv_data, device_options)) < 0))
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goto fail;
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if (s->iformat) {
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if ((ret = s->iformat->create_device_capabilities(s, *caps)) < 0)
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goto fail;
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} else {
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if ((ret = s->oformat->create_device_capabilities(s, *caps)) < 0)
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goto fail;
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}
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av_opt_set_defaults(*caps);
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return 0;
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fail:
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av_freep(caps);
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return ret;
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}
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void avdevice_capabilities_free(AVDeviceCapabilitiesQuery **caps, AVFormatContext *s)
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{
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if (!s || !caps || !(*caps))
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return;
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av_assert0(s->iformat || s->oformat);
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if (s->iformat) {
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if (s->iformat->free_device_capabilities)
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s->iformat->free_device_capabilities(s, *caps);
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} else {
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if (s->oformat->free_device_capabilities)
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s->oformat->free_device_capabilities(s, *caps);
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}
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av_freep(caps);
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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 && !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(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(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_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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