3 * Copyright (c) 2017 Maksym Veremeyenko
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavformat/avformat.h"
23 #include "libavformat/internal.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/imgutils.h"
27 #include "libndi_newtek_common.h"
30 const AVClass *cclass;
34 int clock_video, clock_audio;
36 NDIlib_video_frame_t *video;
37 NDIlib_audio_frame_interleaved_16s_t *audio;
38 NDIlib_send_instance_t ndi_send;
39 AVFrame *last_avframe;
42 static int ndi_write_trailer(AVFormatContext *avctx)
44 struct NDIContext *ctx = avctx->priv_data;
47 NDIlib_send_destroy(ctx->ndi_send);
48 av_frame_free(&ctx->last_avframe);
51 av_freep(&ctx->video);
52 av_freep(&ctx->audio);
57 static int ndi_write_video_packet(AVFormatContext *avctx, AVStream *st, AVPacket *pkt)
59 struct NDIContext *ctx = avctx->priv_data;
60 AVFrame *avframe, *tmp = (AVFrame *)pkt->data;
62 if (tmp->format != AV_PIX_FMT_UYVY422 && tmp->format != AV_PIX_FMT_BGRA &&
63 tmp->format != AV_PIX_FMT_BGR0 && tmp->format != AV_PIX_FMT_RGBA &&
64 tmp->format != AV_PIX_FMT_RGB0) {
65 av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid pixel format.\n");
66 return AVERROR(EINVAL);
69 if (tmp->linesize[0] < 0) {
70 av_log(avctx, AV_LOG_ERROR, "Got a frame with negative linesize.\n");
71 return AVERROR(EINVAL);
74 if (tmp->width != ctx->video->xres ||
75 tmp->height != ctx->video->yres) {
76 av_log(avctx, AV_LOG_ERROR, "Got a frame with invalid dimension.\n");
77 av_log(avctx, AV_LOG_ERROR, "tmp->width=%d, tmp->height=%d, ctx->video->xres=%d, ctx->video->yres=%d\n",
78 tmp->width, tmp->height, ctx->video->xres, ctx->video->yres);
79 return AVERROR(EINVAL);
82 avframe = av_frame_clone(tmp);
84 return AVERROR(ENOMEM);
86 ctx->video->timecode = av_rescale_q(pkt->pts, st->time_base, NDI_TIME_BASE_Q);
88 ctx->video->line_stride_in_bytes = avframe->linesize[0];
89 ctx->video->p_data = (void *)(avframe->data[0]);
91 av_log(avctx, AV_LOG_DEBUG, "%s: pkt->pts=%"PRId64", timecode=%"PRId64", st->time_base=%d/%d\n",
92 __func__, pkt->pts, ctx->video->timecode, st->time_base.num, st->time_base.den);
94 /* asynchronous for one frame, but will block if a second frame
95 is given before the first one has been sent */
96 NDIlib_send_send_video_async(ctx->ndi_send, ctx->video);
98 av_frame_free(&ctx->last_avframe);
99 ctx->last_avframe = avframe;
104 static int ndi_write_audio_packet(AVFormatContext *avctx, AVStream *st, AVPacket *pkt)
106 struct NDIContext *ctx = avctx->priv_data;
108 ctx->audio->p_data = (short *)pkt->data;
109 ctx->audio->timecode = av_rescale_q(pkt->pts, st->time_base, NDI_TIME_BASE_Q);
110 ctx->audio->no_samples = pkt->size / (ctx->audio->no_channels << 1);
112 av_log(avctx, AV_LOG_DEBUG, "%s: pkt->pts=%"PRId64", timecode=%"PRId64", st->time_base=%d/%d\n",
113 __func__, pkt->pts, ctx->audio->timecode, st->time_base.num, st->time_base.den);
115 NDIlib_util_send_send_audio_interleaved_16s(ctx->ndi_send, ctx->audio);
120 static int ndi_write_packet(AVFormatContext *avctx, AVPacket *pkt)
122 AVStream *st = avctx->streams[pkt->stream_index];
124 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
125 return ndi_write_video_packet(avctx, st, pkt);
126 else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
127 return ndi_write_audio_packet(avctx, st, pkt);
132 static int ndi_setup_audio(AVFormatContext *avctx, AVStream *st)
134 struct NDIContext *ctx = avctx->priv_data;
135 AVCodecParameters *c = st->codecpar;
138 av_log(avctx, AV_LOG_ERROR, "Only one audio stream is supported!\n");
139 return AVERROR(EINVAL);
142 ctx->audio = av_mallocz(sizeof(NDIlib_audio_frame_interleaved_16s_t));
144 return AVERROR(ENOMEM);
146 ctx->audio->sample_rate = c->sample_rate;
147 ctx->audio->no_channels = c->channels;
148 ctx->audio->reference_level = ctx->reference_level;
150 avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
155 static int ndi_setup_video(AVFormatContext *avctx, AVStream *st)
157 struct NDIContext *ctx = avctx->priv_data;
158 AVCodecParameters *c = st->codecpar;
161 av_log(avctx, AV_LOG_ERROR, "Only one video stream is supported!\n");
162 return AVERROR(EINVAL);
165 if (c->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME) {
166 av_log(avctx, AV_LOG_ERROR, "Unsupported codec format!"
167 " Only AV_CODEC_ID_WRAPPED_AVFRAME is supported (-vcodec wrapped_avframe).\n");
168 return AVERROR(EINVAL);
171 if (c->format != AV_PIX_FMT_UYVY422 && c->format != AV_PIX_FMT_BGRA &&
172 c->format != AV_PIX_FMT_BGR0 && c->format != AV_PIX_FMT_RGBA &&
173 c->format != AV_PIX_FMT_RGB0) {
174 av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format!"
175 " Only AV_PIX_FMT_UYVY422, AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0,"
176 " AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB0 is supported.\n");
177 return AVERROR(EINVAL);
180 if (c->field_order == AV_FIELD_BB || c->field_order == AV_FIELD_BT) {
181 av_log(avctx, AV_LOG_ERROR, "Lower field-first disallowed");
182 return AVERROR(EINVAL);
185 ctx->video = av_mallocz(sizeof(NDIlib_video_frame_t));
187 return AVERROR(ENOMEM);
190 case AV_PIX_FMT_UYVY422:
191 ctx->video->FourCC = NDIlib_FourCC_type_UYVY;
193 case AV_PIX_FMT_BGRA:
194 ctx->video->FourCC = NDIlib_FourCC_type_BGRA;
196 case AV_PIX_FMT_BGR0:
197 ctx->video->FourCC = NDIlib_FourCC_type_BGRX;
199 case AV_PIX_FMT_RGBA:
200 ctx->video->FourCC = NDIlib_FourCC_type_RGBA;
202 case AV_PIX_FMT_RGB0:
203 ctx->video->FourCC = NDIlib_FourCC_type_RGBX;
207 ctx->video->xres = c->width;
208 ctx->video->yres = c->height;
209 ctx->video->frame_rate_N = st->avg_frame_rate.num;
210 ctx->video->frame_rate_D = st->avg_frame_rate.den;
211 ctx->video->frame_format_type = c->field_order == AV_FIELD_PROGRESSIVE
212 ? NDIlib_frame_format_type_progressive
213 : NDIlib_frame_format_type_interleaved;
215 if (st->sample_aspect_ratio.num) {
216 AVRational display_aspect_ratio;
217 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
218 st->codecpar->width * (int64_t)st->sample_aspect_ratio.num,
219 st->codecpar->height * (int64_t)st->sample_aspect_ratio.den,
221 ctx->video->picture_aspect_ratio = av_q2d(display_aspect_ratio);
224 ctx->video->picture_aspect_ratio = (double)st->codecpar->width/st->codecpar->height;
226 avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
231 static int ndi_write_header(AVFormatContext *avctx)
235 struct NDIContext *ctx = avctx->priv_data;
236 const NDIlib_send_create_t ndi_send_desc = { .p_ndi_name = avctx->filename,
237 .p_groups = NULL, .clock_video = ctx->clock_video, .clock_audio = ctx->clock_audio };
239 if (!NDIlib_initialize()) {
240 av_log(avctx, AV_LOG_ERROR, "NDIlib_initialize failed.\n");
241 return AVERROR_EXTERNAL;
244 /* check if streams compatible */
245 for (n = 0; n < avctx->nb_streams; n++) {
246 AVStream *st = avctx->streams[n];
247 AVCodecParameters *c = st->codecpar;
248 if (c->codec_type == AVMEDIA_TYPE_AUDIO) {
249 if ((ret = ndi_setup_audio(avctx, st)))
251 } else if (c->codec_type == AVMEDIA_TYPE_VIDEO) {
252 if ((ret = ndi_setup_video(avctx, st)))
255 av_log(avctx, AV_LOG_ERROR, "Unsupported stream type.\n");
256 ret = AVERROR(EINVAL);
261 ctx->ndi_send = NDIlib_send_create(&ndi_send_desc);
262 if (!ctx->ndi_send) {
263 av_log(avctx, AV_LOG_ERROR, "Failed to create NDI output %s\n", avctx->filename);
264 ret = AVERROR_EXTERNAL;
271 #define OFFSET(x) offsetof(struct NDIContext, x)
272 static const AVOption options[] = {
273 { "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},
274 { "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 },
275 { "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 },
279 static const AVClass libndi_newtek_muxer_class = {
280 .class_name = "NDI muxer",
281 .item_name = av_default_item_name,
283 .version = LIBAVUTIL_VERSION_INT,
284 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
287 AVOutputFormat ff_libndi_newtek_muxer = {
288 .name = "libndi_newtek",
289 .long_name = NULL_IF_CONFIG_SMALL("Network Device Interface (NDI) output using NewTek library"),
290 .audio_codec = AV_CODEC_ID_PCM_S16LE,
291 .video_codec = AV_CODEC_ID_WRAPPED_AVFRAME,
292 .subtitle_codec = AV_CODEC_ID_NONE,
293 .flags = AVFMT_NOFILE,
294 .priv_class = &libndi_newtek_muxer_class,
295 .priv_data_size = sizeof(struct NDIContext),
296 .write_header = ndi_write_header,
297 .write_packet = ndi_write_packet,
298 .write_trailer = ndi_write_trailer,