#include <stdio.h>
#include <time.h>
#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
#include <string>
#include <thread>
VideoEncoder::VideoEncoder(ResourcePool *resource_pool, QSurface *surface, const std::string &va_display, int width, int height, HTTPD *httpd, DiskSpaceEstimator *disk_space_estimator)
: resource_pool(resource_pool), surface(surface), va_display(va_display), width(width), height(height), httpd(httpd), disk_space_estimator(disk_space_estimator)
{
+ // TODO: If we're outputting AV1, we can't use MPEG-TS currently.
+ srt_oformat = av_guess_format("mpegts", nullptr, nullptr);
+ assert(srt_oformat != nullptr);
+
oformat = av_guess_format(global_flags.stream_mux_name.c_str(), nullptr, nullptr);
assert(oformat != nullptr);
if (global_flags.stream_audio_codec_name.empty()) {
string filename = generate_local_dump_filename(/*frame=*/0);
quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, oformat, http_encoder, disk_encoder, disk_space_estimator));
- open_output_stream();
+ open_output_streams();
stream_audio_encoder->add_mux(http_mux.get());
+ stream_audio_encoder->add_mux(srt_mux.get());
quicksync_encoder->set_http_mux(http_mux.get());
+ quicksync_encoder->set_srt_mux(srt_mux.get());
if (global_flags.x264_video_to_http) {
x264_encoder->add_mux(http_mux.get());
+ x264_encoder->add_mux(srt_mux.get());
}
#ifdef HAVE_AV1
if (global_flags.av1_video_to_http) {
av1_encoder->add_mux(http_mux.get());
+ av1_encoder->add_mux(srt_mux.get());
}
#endif
}
return quicksync_encoder->end_frame();
}
-void VideoEncoder::open_output_stream()
+void VideoEncoder::open_output_streams()
{
- AVFormatContext *avctx = avformat_alloc_context();
- avctx->oformat = oformat;
+ for (bool is_srt : {false, true}) {
+ if (is_srt && global_flags.srt_destination_host.empty()) {
+ continue;
+ }
- uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
- avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
- avctx->pb->write_data_type = &VideoEncoder::write_packet2_thunk;
- avctx->pb->ignore_boundary_point = 1;
+ AVFormatContext *avctx = avformat_alloc_context();
+ avctx->oformat = is_srt ? srt_oformat : oformat;
- Mux::Codec video_codec;
- if (global_flags.av1_video_to_http) {
- video_codec = Mux::CODEC_AV1;
- } else {
- video_codec = Mux::CODEC_H264;
- }
+ uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
+ avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
+ if (is_srt) {
+ avctx->pb->write_packet = &VideoEncoder::write_srt_packet_thunk;
+ } else {
+ avctx->pb->write_data_type = &VideoEncoder::write_packet2_thunk;
+ avctx->pb->ignore_boundary_point = 1;
+ }
+
+ Mux::Codec video_codec;
+ if (global_flags.av1_video_to_http) {
+ video_codec = Mux::CODEC_AV1;
+ } else {
+ video_codec = Mux::CODEC_H264;
+ }
- avctx->flags = AVFMT_FLAG_CUSTOM_IO;
+ avctx->flags = AVFMT_FLAG_CUSTOM_IO;
- string video_extradata;
- if (global_flags.x264_video_to_http) {
- video_extradata = x264_encoder->get_global_headers();
+ string video_extradata;
+ if (global_flags.x264_video_to_http) {
+ video_extradata = x264_encoder->get_global_headers();
#ifdef HAVE_AV1
- } else if (global_flags.av1_video_to_http) {
- video_extradata = av1_encoder->get_global_headers();
+ } else if (global_flags.av1_video_to_http) {
+ video_extradata = av1_encoder->get_global_headers();
#endif
- }
+ }
- http_mux.reset(new Mux(avctx, width, height, video_codec, video_extradata, stream_audio_encoder->get_codec_parameters().get(),
- get_color_space(global_flags.ycbcr_rec709_coefficients), COARSE_TIMEBASE,
- /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, { &http_mux_metrics }));
- http_mux_metrics.init({{ "destination", "http" }});
+ Mux *mux = new Mux(avctx, width, height, video_codec, video_extradata, stream_audio_encoder->get_codec_parameters().get(),
+ get_color_space(global_flags.ycbcr_rec709_coefficients), COARSE_TIMEBASE,
+ /*write_callback=*/nullptr, is_srt ? Mux::WRITE_BACKGROUND : Mux::WRITE_FOREGROUND, { is_srt ? &srt_mux_metrics : &http_mux_metrics });
+ if (is_srt) {
+ srt_mux.reset(mux);
+ srt_mux_metrics.init({{ "destination", "srt" }});
+ } else {
+ http_mux.reset(mux);
+ http_mux_metrics.init({{ "destination", "http" }});
+ }
+ }
}
int VideoEncoder::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
return buf_size;
}
+int VideoEncoder::write_srt_packet_thunk(void *opaque, uint8_t *buf, int buf_size)
+{
+ VideoEncoder *video_encoder = (VideoEncoder *)opaque;
+ return video_encoder->write_srt_packet(buf, buf_size);
+}
+
+static string print_addrinfo(const addrinfo *ai)
+{
+ char hoststr[NI_MAXHOST], portstr[NI_MAXSERV];
+ if (getnameinfo(ai->ai_addr, ai->ai_addrlen, hoststr, sizeof(hoststr), portstr, sizeof(portstr), NI_DGRAM | NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
+ return "<unknown address>"; // Should basically never happen, since we're not doing DNS lookups.
+ }
+
+ if (ai->ai_family == AF_INET6) {
+ return string("[") + hoststr + "]:" + portstr;
+ } else {
+ return string(hoststr) + ":" + portstr;
+ }
+}
+
+int VideoEncoder::open_srt_socket()
+{
+ int sock = srt_create_socket();
+ if (sock == -1) {
+ fprintf(stderr, "srt_create_socket(): %s\n", srt_getlasterror_str());
+ return -1;
+ }
+
+ SRT_TRANSTYPE live = SRTT_LIVE;
+ if (srt_setsockopt(sock, 0, SRTO_TRANSTYPE, &live, sizeof(live)) < 0) {
+ fprintf(stderr, "srt_setsockopt(SRTO_TRANSTYPE): %s\n", srt_getlasterror_str());
+ srt_close(sock);
+ return -1;
+ }
+
+ if (srt_setsockopt(sock, 0, SRTO_LATENCY, &global_flags.srt_output_latency, sizeof(global_flags.srt_output_latency)) < 0) {
+ fprintf(stderr, "srt_setsockopt(SRTO_LATENCY): %s\n", srt_getlasterror_str());
+ srt_close(sock);
+ return -1;
+ }
+
+ if (!global_flags.srt_streamid.empty()) {
+ if (srt_setsockopt(sock, 0, SRTO_STREAMID, global_flags.srt_streamid.data(), global_flags.srt_streamid.size()) < 0) {
+ fprintf(stderr, "srt_setsockopt(SRTO_STREAMID): %s\n", srt_getlasterror_str());
+ srt_close(sock);
+ return -1;
+ }
+ }
+
+ if (!global_flags.srt_passphrase.empty()) {
+ if (srt_setsockopt(sock, 0, SRTO_PASSPHRASE, global_flags.srt_passphrase.data(), global_flags.srt_passphrase.size()) < 0) {
+ fprintf(stderr, "srt_setsockopt(SRTO_PASSPHRASE): %s\n", srt_getlasterror_str());
+ srt_close(sock);
+ return -1;
+ }
+ }
+
+ return sock;
+}
+
+int VideoEncoder::connect_to_srt()
+{
+ // We need to specify SOCK_DGRAM as a hint, or we'll get all addresses
+ // three times (for each of TCP, UDP, raw).
+ addrinfo hints;
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = AI_ADDRCONFIG;
+ hints.ai_socktype = SOCK_DGRAM;
+
+ addrinfo *ai;
+ int ret = getaddrinfo(global_flags.srt_destination_host.c_str(), global_flags.srt_destination_port.c_str(), &hints, &ai);
+ if (ret != 0) {
+ fprintf(stderr, "getaddrinfo(%s:%s): %s\n", global_flags.srt_destination_host.c_str(), global_flags.srt_destination_port.c_str(), gai_strerror(ret));
+ return -1;
+ }
+
+ for (const addrinfo *cur = ai; cur != nullptr; cur = cur->ai_next) {
+ // Seemingly, srt_create_socket() isn't universal; once we try to connect,
+ // it gets locked to either IPv4 or IPv6. So we need to create a new one
+ // for every address we try.
+ int sock = open_srt_socket();
+ if (sock == -1) {
+ // Die immediately.
+ return sock;
+ }
+ if (srt_connect(sock, cur->ai_addr, cur->ai_addrlen) < 0) {
+ fprintf(stderr, "srt_connect(%s): %s\n", print_addrinfo(cur).c_str(), srt_getlasterror_str());
+ srt_close(sock);
+ continue;
+ }
+ fprintf(stderr, "Connected to destination SRT endpoint at %s.\n", print_addrinfo(cur).c_str());
+ freeaddrinfo(ai);
+ return sock;
+ }
+
+ // Out of candidates, so give up.
+ freeaddrinfo(ai);
+ return -1;
+}
+
+int VideoEncoder::write_srt_packet(uint8_t *buf, int buf_size)
+{
+ while (buf_size > 0) {
+ if (srt_sock == -1) {
+ srt_sock = connect_to_srt();
+ if (srt_sock == -1) {
+ usleep(100000);
+ continue;
+ }
+ }
+ int to_send = min(buf_size, SRT_LIVE_DEF_PLSIZE);
+ int ret = srt_send(srt_sock, (char *)buf, to_send);
+ if (ret < 0) {
+ fprintf(stderr, "srt_send(): %s\n", srt_getlasterror_str());
+ srt_close(srt_sock);
+ srt_sock = connect_to_srt();
+ continue;
+ }
+ buf += ret;
+ buf_size -= ret;
+ }
+ return buf_size;
+}
+
projects / nageru / blobdiff