lavd: implement NewTek NDI input/output device support

Signed-off-by: Marton Balint <cus@passwd.hu>

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,
+};