diff options
Diffstat (limited to 'libavdevice/libndi_newtek_enc.c')
-rw-r--r-- | libavdevice/libndi_newtek_enc.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/libavdevice/libndi_newtek_enc.c b/libavdevice/libndi_newtek_enc.c new file mode 100644 index 0000000000..6ca6f41b73 --- /dev/null +++ b/libavdevice/libndi_newtek_enc.c @@ -0,0 +1,299 @@ +/* + * 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->filename, + .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->filename); + 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, +}; |