mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
300 lines
10 KiB
C
300 lines
10 KiB
C
/*
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* NewTek NDI output
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* Copyright (c) 2017 Maksym Veremeyenko
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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 "libavformat/avformat.h"
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#include "libavformat/internal.h"
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "libndi_newtek_common.h"
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struct NDIContext {
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const AVClass *cclass;
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/* Options */
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int reference_level;
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int clock_video, clock_audio;
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NDIlib_video_frame_t *video;
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NDIlib_audio_frame_interleaved_16s_t *audio;
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NDIlib_send_instance_t ndi_send;
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AVFrame *last_avframe;
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};
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static int ndi_write_trailer(AVFormatContext *avctx)
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{
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struct NDIContext *ctx = avctx->priv_data;
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if (ctx->ndi_send) {
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NDIlib_send_destroy(ctx->ndi_send);
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av_frame_free(&ctx->last_avframe);
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}
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av_freep(&ctx->video);
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av_freep(&ctx->audio);
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return 0;
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}
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static int ndi_write_video_packet(AVFormatContext *avctx, AVStream *st, AVPacket *pkt)
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{
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struct NDIContext *ctx = avctx->priv_data;
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AVFrame *avframe, *tmp = (AVFrame *)pkt->data;
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if (tmp->format != AV_PIX_FMT_UYVY422 && tmp->format != AV_PIX_FMT_BGRA &&
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tmp->format != AV_PIX_FMT_BGR0 && tmp->format != AV_PIX_FMT_RGBA &&
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tmp->format != AV_PIX_FMT_RGB0) {
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av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid pixel format.\n");
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return AVERROR(EINVAL);
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}
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if (tmp->linesize[0] < 0) {
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av_log(avctx, AV_LOG_ERROR, "Got a frame with negative linesize.\n");
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return AVERROR(EINVAL);
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}
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if (tmp->width != ctx->video->xres ||
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tmp->height != ctx->video->yres) {
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av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid dimension.\n");
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av_log(avctx, AV_LOG_ERROR, "tmp->width=%d, tmp->height=%d, ctx->video->xres=%d, ctx->video->yres=%d\n",
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tmp->width, tmp->height, ctx->video->xres, ctx->video->yres);
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return AVERROR(EINVAL);
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}
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avframe = av_frame_clone(tmp);
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if (!avframe)
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return AVERROR(ENOMEM);
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ctx->video->timecode = av_rescale_q(pkt->pts, st->time_base, NDI_TIME_BASE_Q);
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ctx->video->line_stride_in_bytes = avframe->linesize[0];
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ctx->video->p_data = (void *)(avframe->data[0]);
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av_log(avctx, AV_LOG_DEBUG, "%s: pkt->pts=%"PRId64", timecode=%"PRId64", st->time_base=%d/%d\n",
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__func__, pkt->pts, ctx->video->timecode, st->time_base.num, st->time_base.den);
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/* asynchronous for one frame, but will block if a second frame
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is given before the first one has been sent */
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NDIlib_send_send_video_async(ctx->ndi_send, ctx->video);
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av_frame_free(&ctx->last_avframe);
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ctx->last_avframe = avframe;
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return 0;
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}
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static int ndi_write_audio_packet(AVFormatContext *avctx, AVStream *st, AVPacket *pkt)
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{
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struct NDIContext *ctx = avctx->priv_data;
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ctx->audio->p_data = (short *)pkt->data;
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ctx->audio->timecode = av_rescale_q(pkt->pts, st->time_base, NDI_TIME_BASE_Q);
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ctx->audio->no_samples = pkt->size / (ctx->audio->no_channels << 1);
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av_log(avctx, AV_LOG_DEBUG, "%s: pkt->pts=%"PRId64", timecode=%"PRId64", st->time_base=%d/%d\n",
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__func__, pkt->pts, ctx->audio->timecode, st->time_base.num, st->time_base.den);
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NDIlib_util_send_send_audio_interleaved_16s(ctx->ndi_send, ctx->audio);
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return 0;
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}
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static int ndi_write_packet(AVFormatContext *avctx, AVPacket *pkt)
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{
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AVStream *st = avctx->streams[pkt->stream_index];
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if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
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return ndi_write_video_packet(avctx, st, pkt);
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else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
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return ndi_write_audio_packet(avctx, st, pkt);
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return AVERROR_BUG;
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}
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static int ndi_setup_audio(AVFormatContext *avctx, AVStream *st)
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{
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struct NDIContext *ctx = avctx->priv_data;
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AVCodecParameters *c = st->codecpar;
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if (ctx->audio) {
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av_log(avctx, AV_LOG_ERROR, "Only one audio stream is supported!\n");
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return AVERROR(EINVAL);
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}
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ctx->audio = av_mallocz(sizeof(NDIlib_audio_frame_interleaved_16s_t));
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if (!ctx->audio)
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return AVERROR(ENOMEM);
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ctx->audio->sample_rate = c->sample_rate;
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ctx->audio->no_channels = c->channels;
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ctx->audio->reference_level = ctx->reference_level;
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avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
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return 0;
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}
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static int ndi_setup_video(AVFormatContext *avctx, AVStream *st)
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{
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struct NDIContext *ctx = avctx->priv_data;
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AVCodecParameters *c = st->codecpar;
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if (ctx->video) {
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av_log(avctx, AV_LOG_ERROR, "Only one video stream is supported!\n");
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return AVERROR(EINVAL);
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}
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if (c->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported codec format!"
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" Only AV_CODEC_ID_WRAPPED_AVFRAME is supported (-vcodec wrapped_avframe).\n");
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return AVERROR(EINVAL);
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}
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if (c->format != AV_PIX_FMT_UYVY422 && c->format != AV_PIX_FMT_BGRA &&
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c->format != AV_PIX_FMT_BGR0 && c->format != AV_PIX_FMT_RGBA &&
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c->format != AV_PIX_FMT_RGB0) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format!"
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" Only AV_PIX_FMT_UYVY422, AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0,"
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" AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB0 is supported.\n");
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return AVERROR(EINVAL);
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}
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if (c->field_order == AV_FIELD_BB || c->field_order == AV_FIELD_BT) {
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av_log(avctx, AV_LOG_ERROR, "Lower field-first disallowed");
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return AVERROR(EINVAL);
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}
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ctx->video = av_mallocz(sizeof(NDIlib_video_frame_t));
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if (!ctx->video)
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return AVERROR(ENOMEM);
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switch(c->format) {
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case AV_PIX_FMT_UYVY422:
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ctx->video->FourCC = NDIlib_FourCC_type_UYVY;
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break;
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case AV_PIX_FMT_BGRA:
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ctx->video->FourCC = NDIlib_FourCC_type_BGRA;
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break;
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case AV_PIX_FMT_BGR0:
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ctx->video->FourCC = NDIlib_FourCC_type_BGRX;
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break;
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case AV_PIX_FMT_RGBA:
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ctx->video->FourCC = NDIlib_FourCC_type_RGBA;
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break;
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case AV_PIX_FMT_RGB0:
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ctx->video->FourCC = NDIlib_FourCC_type_RGBX;
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break;
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}
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ctx->video->xres = c->width;
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ctx->video->yres = c->height;
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ctx->video->frame_rate_N = st->avg_frame_rate.num;
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ctx->video->frame_rate_D = st->avg_frame_rate.den;
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ctx->video->frame_format_type = c->field_order == AV_FIELD_PROGRESSIVE
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? NDIlib_frame_format_type_progressive
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: NDIlib_frame_format_type_interleaved;
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if (st->sample_aspect_ratio.num) {
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AVRational display_aspect_ratio;
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av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
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st->codecpar->width * (int64_t)st->sample_aspect_ratio.num,
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st->codecpar->height * (int64_t)st->sample_aspect_ratio.den,
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1024 * 1024);
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ctx->video->picture_aspect_ratio = av_q2d(display_aspect_ratio);
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}
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else
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ctx->video->picture_aspect_ratio = (double)st->codecpar->width/st->codecpar->height;
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avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
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return 0;
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}
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static int ndi_write_header(AVFormatContext *avctx)
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{
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int ret = 0;
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unsigned int n;
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struct NDIContext *ctx = avctx->priv_data;
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const NDIlib_send_create_t ndi_send_desc = { .p_ndi_name = avctx->url,
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.p_groups = NULL, .clock_video = ctx->clock_video, .clock_audio = ctx->clock_audio };
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if (!NDIlib_initialize()) {
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av_log(avctx, AV_LOG_ERROR, "NDIlib_initialize failed.\n");
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return AVERROR_EXTERNAL;
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}
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/* check if streams compatible */
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for (n = 0; n < avctx->nb_streams; n++) {
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AVStream *st = avctx->streams[n];
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AVCodecParameters *c = st->codecpar;
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if (c->codec_type == AVMEDIA_TYPE_AUDIO) {
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if ((ret = ndi_setup_audio(avctx, st)))
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goto error;
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} else if (c->codec_type == AVMEDIA_TYPE_VIDEO) {
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if ((ret = ndi_setup_video(avctx, st)))
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goto error;
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} else {
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av_log(avctx, AV_LOG_ERROR, "Unsupported stream type.\n");
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ret = AVERROR(EINVAL);
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goto error;
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}
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}
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ctx->ndi_send = NDIlib_send_create(&ndi_send_desc);
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if (!ctx->ndi_send) {
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av_log(avctx, AV_LOG_ERROR, "Failed to create NDI output %s\n", avctx->url);
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ret = AVERROR_EXTERNAL;
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}
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error:
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return ret;
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}
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#define OFFSET(x) offsetof(struct NDIContext, x)
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static const AVOption options[] = {
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{ "reference_level", "The audio reference level in dB" , OFFSET(reference_level), AV_OPT_TYPE_INT, { .i64 = 0 }, -20, 20, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM},
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{ "clock_video", "These specify whether video 'clock' themselves" , OFFSET(clock_video), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM },
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{ "clock_audio", "These specify whether audio 'clock' themselves" , OFFSET(clock_audio), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM },
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{ NULL },
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};
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static const AVClass libndi_newtek_muxer_class = {
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.class_name = "NDI muxer",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
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};
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AVOutputFormat ff_libndi_newtek_muxer = {
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.name = "libndi_newtek",
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.long_name = NULL_IF_CONFIG_SMALL("Network Device Interface (NDI) output using NewTek library"),
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.audio_codec = AV_CODEC_ID_PCM_S16LE,
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.video_codec = AV_CODEC_ID_WRAPPED_AVFRAME,
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.subtitle_codec = AV_CODEC_ID_NONE,
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.flags = AVFMT_NOFILE,
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.priv_class = &libndi_newtek_muxer_class,
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.priv_data_size = sizeof(struct NDIContext),
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.write_header = ndi_write_header,
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.write_packet = ndi_write_packet,
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.write_trailer = ndi_write_trailer,
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};
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