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;
35 int allow_video_fields;
39 NDIlib_recv_create_t *recv;
40 NDIlib_find_instance_t ndi_find;
43 AVStream *video_st, *audio_st;
46 static int ndi_set_video_packet(AVFormatContext *avctx, NDIlib_video_frame_t *v, AVPacket *pkt)
49 struct NDIContext *ctx = avctx->priv_data;
51 ret = av_new_packet(pkt, v->yres * v->line_stride_in_bytes);
55 pkt->dts = pkt->pts = av_rescale_q(v->timecode, NDI_TIME_BASE_Q, ctx->video_st->time_base);
56 pkt->duration = av_rescale_q(1, (AVRational){v->frame_rate_D, v->frame_rate_N}, ctx->video_st->time_base);
58 av_log(avctx, AV_LOG_DEBUG, "%s: pkt->dts = pkt->pts = %"PRId64", duration=%"PRId64", timecode=%"PRId64"\n",
59 __func__, pkt->dts, pkt->duration, v->timecode);
61 pkt->flags |= AV_PKT_FLAG_KEY;
62 pkt->stream_index = ctx->video_st->index;
64 memcpy(pkt->data, v->p_data, pkt->size);
69 static int ndi_set_audio_packet(AVFormatContext *avctx, NDIlib_audio_frame_t *a, AVPacket *pkt)
72 struct NDIContext *ctx = avctx->priv_data;
74 NDIlib_audio_frame_interleaved_16s_t dst;
76 ret = av_new_packet(pkt, 2 * a->no_samples * a->no_channels);
80 pkt->dts = pkt->pts = av_rescale_q(a->timecode, NDI_TIME_BASE_Q, ctx->audio_st->time_base);
81 pkt->duration = av_rescale_q(1, (AVRational){a->no_samples, a->sample_rate}, ctx->audio_st->time_base);
83 av_log(avctx, AV_LOG_DEBUG, "%s: pkt->dts = pkt->pts = %"PRId64", duration=%"PRId64", timecode=%"PRId64"\n",
84 __func__, pkt->dts, pkt->duration, a->timecode);
86 pkt->flags |= AV_PKT_FLAG_KEY;
87 pkt->stream_index = ctx->audio_st->index;
89 dst.reference_level = 0;
90 dst.p_data = (short *)pkt->data;
91 NDIlib_util_audio_to_interleaved_16s(a, &dst);
96 static int ndi_find_sources(AVFormatContext *avctx, const char *name, NDIlib_source_t *source_to_connect_to)
98 int j = AVERROR(ENODEV);
100 struct NDIContext *ctx = avctx->priv_data;
101 const NDIlib_source_t *ndi_srcs = NULL;
102 const NDIlib_find_create_t find_create_desc = { .show_local_sources = true,
103 .p_groups = NULL, .p_extra_ips = ctx->extra_ips };
106 ctx->ndi_find = NDIlib_find_create2(&find_create_desc);
107 if (!ctx->ndi_find) {
108 av_log(avctx, AV_LOG_ERROR, "NDIlib_find_create failed.\n");
114 int f, t = ctx->wait_sources / 1000;
115 av_log(avctx, AV_LOG_DEBUG, "Waiting for sources %d miliseconds\n", t);
116 f = NDIlib_find_wait_for_sources(ctx->ndi_find, t);
117 av_log(avctx, AV_LOG_DEBUG, "NDIlib_find_wait_for_sources returns %d\n", f);
122 ndi_srcs = NDIlib_find_get_current_sources(ctx->ndi_find, &n);
124 if (ctx->find_sources)
125 av_log(avctx, AV_LOG_INFO, "Found %d NDI sources:\n", n);
127 for (i = 0; i < n; i++) {
128 if (ctx->find_sources)
129 av_log(avctx, AV_LOG_INFO, "\t'%s'\t'%s'\n", ndi_srcs[i].p_ndi_name, ndi_srcs[i].p_ip_address);
131 if (!strcmp(name, ndi_srcs[i].p_ndi_name)) {
132 *source_to_connect_to = ndi_srcs[i];
140 static int ndi_read_header(AVFormatContext *avctx)
143 NDIlib_recv_create_t recv_create_desc;
144 const NDIlib_tally_t tally_state = { .on_program = true, .on_preview = false };
145 struct NDIContext *ctx = avctx->priv_data;
147 if (!NDIlib_initialize()) {
148 av_log(avctx, AV_LOG_ERROR, "NDIlib_initialize failed.\n");
149 return AVERROR_EXTERNAL;
152 /* Find available sources. */
153 ret = ndi_find_sources(avctx, avctx->url, &recv_create_desc.source_to_connect_to);
154 if (ctx->find_sources) {
160 /* Create receiver description */
161 recv_create_desc.color_format = NDIlib_recv_color_format_e_UYVY_RGBA;
162 recv_create_desc.bandwidth = NDIlib_recv_bandwidth_highest;
163 recv_create_desc.allow_video_fields = ctx->allow_video_fields;
165 /* Create the receiver */
166 ctx->recv = NDIlib_recv_create(&recv_create_desc);
168 av_log(avctx, AV_LOG_ERROR, "NDIlib_recv_create2 failed.\n");
173 NDIlib_recv_set_tally(ctx->recv, &tally_state);
175 avctx->ctx_flags |= AVFMTCTX_NOHEADER;
180 static int ndi_create_video_stream(AVFormatContext *avctx, NDIlib_video_frame_t *v)
184 struct NDIContext *ctx = avctx->priv_data;
186 st = avformat_new_stream(avctx, NULL);
188 av_log(avctx, AV_LOG_ERROR, "Cannot add video stream\n");
189 return AVERROR(ENOMEM);
192 st->time_base = NDI_TIME_BASE_Q;
193 st->r_frame_rate = av_make_q(v->frame_rate_N, v->frame_rate_D);
195 tmp = av_mul_q(av_d2q(v->picture_aspect_ratio, INT_MAX), (AVRational){v->yres, v->xres});
196 av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den, tmp.num, tmp.den, 1000);
197 st->codecpar->sample_aspect_ratio = st->sample_aspect_ratio;
199 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
200 st->codecpar->width = v->xres;
201 st->codecpar->height = v->yres;
202 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
203 st->codecpar->bit_rate = av_rescale(v->xres * v->yres * 16, v->frame_rate_N, v->frame_rate_D);
204 st->codecpar->field_order = v->frame_format_type == NDIlib_frame_format_type_progressive
205 ? AV_FIELD_PROGRESSIVE : AV_FIELD_TT;
207 if (NDIlib_FourCC_type_UYVY == v->FourCC || NDIlib_FourCC_type_UYVA == v->FourCC) {
208 st->codecpar->format = AV_PIX_FMT_UYVY422;
209 st->codecpar->codec_tag = MKTAG('U', 'Y', 'V', 'Y');
210 if (NDIlib_FourCC_type_UYVA == v->FourCC)
211 av_log(avctx, AV_LOG_WARNING, "Alpha channel ignored\n");
212 } else if (NDIlib_FourCC_type_BGRA == v->FourCC) {
213 st->codecpar->format = AV_PIX_FMT_BGRA;
214 st->codecpar->codec_tag = MKTAG('B', 'G', 'R', 'A');
215 } else if (NDIlib_FourCC_type_BGRX == v->FourCC) {
216 st->codecpar->format = AV_PIX_FMT_BGR0;
217 st->codecpar->codec_tag = MKTAG('B', 'G', 'R', '0');
218 } else if (NDIlib_FourCC_type_RGBA == v->FourCC) {
219 st->codecpar->format = AV_PIX_FMT_RGBA;
220 st->codecpar->codec_tag = MKTAG('R', 'G', 'B', 'A');
221 } else if (NDIlib_FourCC_type_RGBX == v->FourCC) {
222 st->codecpar->format = AV_PIX_FMT_RGB0;
223 st->codecpar->codec_tag = MKTAG('R', 'G', 'B', '0');
225 av_log(avctx, AV_LOG_ERROR, "Unsupported video stream format, v->FourCC=%d\n", v->FourCC);
226 return AVERROR(EINVAL);
229 avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
236 static int ndi_create_audio_stream(AVFormatContext *avctx, NDIlib_audio_frame_t *a)
239 struct NDIContext *ctx = avctx->priv_data;
241 st = avformat_new_stream(avctx, NULL);
243 av_log(avctx, AV_LOG_ERROR, "Cannot add audio stream\n");
244 return AVERROR(ENOMEM);
247 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
248 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
249 st->codecpar->sample_rate = a->sample_rate;
250 st->codecpar->channels = a->no_channels;
252 avpriv_set_pts_info(st, 64, 1, NDI_TIME_BASE);
259 static int ndi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
262 struct NDIContext *ctx = avctx->priv_data;
265 NDIlib_video_frame_t v;
266 NDIlib_audio_frame_t a;
267 NDIlib_metadata_frame_t m;
268 NDIlib_frame_type_e t;
270 av_log(avctx, AV_LOG_DEBUG, "NDIlib_recv_capture...\n");
271 t = NDIlib_recv_capture(ctx->recv, &v, &a, &m, 40);
272 av_log(avctx, AV_LOG_DEBUG, "NDIlib_recv_capture=%d\n", t);
274 if (t == NDIlib_frame_type_video) {
276 ret = ndi_create_video_stream(avctx, &v);
278 ret = ndi_set_video_packet(avctx, &v, pkt);
279 NDIlib_recv_free_video(ctx->recv, &v);
282 else if (t == NDIlib_frame_type_audio) {
284 ret = ndi_create_audio_stream(avctx, &a);
286 ret = ndi_set_audio_packet(avctx, &a, pkt);
287 NDIlib_recv_free_audio(ctx->recv, &a);
290 else if (t == NDIlib_frame_type_metadata)
291 NDIlib_recv_free_metadata(ctx->recv, &m);
292 else if (t == NDIlib_frame_type_error){
293 av_log(avctx, AV_LOG_ERROR, "NDIlib_recv_capture failed with error\n");
301 static int ndi_read_close(AVFormatContext *avctx)
303 struct NDIContext *ctx = (struct NDIContext *)avctx->priv_data;
306 NDIlib_recv_destroy(ctx->recv);
309 NDIlib_find_destroy(ctx->ndi_find);
314 #define OFFSET(x) offsetof(struct NDIContext, x)
315 #define DEC AV_OPT_FLAG_DECODING_PARAM
317 static const AVOption options[] = {
318 { "find_sources", "Find available sources" , OFFSET(find_sources), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
319 { "wait_sources", "Time to wait until the number of online sources have changed" , OFFSET(wait_sources), AV_OPT_TYPE_DURATION, { .i64 = 1000000 }, 100000, 20000000, DEC },
320 { "allow_video_fields", "When this flag is FALSE, all video that you receive will be progressive" , OFFSET(allow_video_fields), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, DEC },
321 { "extra_ips", "List of comma separated ip addresses to scan for remote sources", OFFSET(extra_ips), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC },
325 static const AVClass libndi_newtek_demuxer_class = {
326 .class_name = "NDI demuxer",
327 .item_name = av_default_item_name,
329 .version = LIBAVUTIL_VERSION_INT,
330 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
333 AVInputFormat ff_libndi_newtek_demuxer = {
334 .name = "libndi_newtek",
335 .long_name = NULL_IF_CONFIG_SMALL("Network Device Interface (NDI) input using NewTek library"),
336 .flags = AVFMT_NOFILE,
337 .priv_class = &libndi_newtek_demuxer_class,
338 .priv_data_size = sizeof(struct NDIContext),
339 .read_header = ndi_read_header,
340 .read_packet = ndi_read_packet,
341 .read_close = ndi_read_close,