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