X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=kaeru.cpp;h=23b3c8786ce4ae0336d60f3cdcd85305d4b6a788;hb=9672da324b767feb716fe32c1ef961881aa97cfd;hp=a82ee51494fa9c29d45d548f9c01cf4dd2a4c132;hpb=b0ce4383b7d64760bbfccf4e0e769b293f0db0cd;p=nageru

diff --git a/kaeru.cpp b/kaeru.cpp
index a82ee51..23b3c87 100644
--- a/kaeru.cpp
+++ b/kaeru.cpp
@@ -1,4 +1,4 @@
-// Kaeru (変える), a simple transcoder intended for use with Nageru.
+// Kaeru (換える), a simple transcoder intended for use with Nageru.
 // This is experimental code, not yet supported.
 
 #include "audio_encoder.h"
@@ -12,15 +12,20 @@
 
 #include <assert.h>
 #include <fcntl.h>
+#include <signal.h>
 #include <unistd.h>
+#include <chrono>
 #include <string>
 
 using namespace bmusb;
 using namespace movit;
 using namespace std;
+using namespace std::chrono;
 using namespace std::placeholders;
 
 Mixer *global_mixer = nullptr;
+X264Encoder *global_x264_encoder = nullptr;
+MuxMetrics stream_mux_metrics;
 
 int write_packet(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
 {
@@ -60,7 +65,8 @@ unique_ptr<Mux> create_mux(HTTPD *httpd, AVOutputFormat *oformat, X264Encoder *x
 	unique_ptr<Mux> mux;
 	int time_base = global_flags.stream_coarse_timebase ? COARSE_TIMEBASE : TIMEBASE;
 	mux.reset(new Mux(avctx, global_flags.width, global_flags.height, Mux::CODEC_H264, video_extradata, audio_encoder->get_codec_parameters().get(), time_base,
-	        /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, {}));
+	        /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, { &stream_mux_metrics }));
+	stream_mux_metrics.init({{ "destination", "http" }});
 	return mux;
 }
 
@@ -72,9 +78,12 @@ void video_frame_callback(FFmpegCapture *video, X264Encoder *x264_encoder, Audio
 	                  FrameAllocator::Frame audio_frame, size_t audio_offset, AudioFormat audio_format)
 {
 	if (video_pts >= 0 && video_frame.len > 0) {
+		ReceivedTimestamps ts;
+		ts.ts.push_back(steady_clock::now());
+
 		video_pts = av_rescale_q(video_pts, video_timebase, AVRational{ 1, TIMEBASE });
 		int64_t frame_duration = TIMEBASE * video_format.frame_rate_nom / video_format.frame_rate_den;
-		x264_encoder->add_frame(video_pts, frame_duration, video->get_current_frame_ycbcr_format().luma_coefficients, video_frame.data + video_offset, ReceivedTimestamps());
+		x264_encoder->add_frame(video_pts, frame_duration, video->get_current_frame_ycbcr_format().luma_coefficients, video_frame.data + video_offset, ts);
 	}
 	if (audio_frame.len > 0) {
 		// FFmpegCapture takes care of this for us.
@@ -117,6 +126,32 @@ void audio_frame_callback(Mux *mux, const AVPacket *pkt, AVRational timebase)
 	mux->add_packet(*pkt, pkt->pts, pkt->dts == AV_NOPTS_VALUE ? pkt->pts : pkt->dts, timebase);
 }
 
+void adjust_bitrate(int signal)
+{
+	int new_bitrate = global_flags.x264_bitrate;
+	if (signal == SIGUSR1) {
+		new_bitrate += 100;
+		if (new_bitrate > 100000) {
+			fprintf(stderr, "Ignoring SIGUSR1, can't increase bitrate below 100000 kbit/sec (currently at %d kbit/sec)\n",
+				global_flags.x264_bitrate);
+		} else {
+			fprintf(stderr, "Increasing bitrate to %d kbit/sec due to SIGUSR1.\n", new_bitrate);
+			global_flags.x264_bitrate = new_bitrate;
+			global_x264_encoder->change_bitrate(new_bitrate);
+		}
+	} else if (signal == SIGUSR2) {
+		new_bitrate -= 100;
+		if (new_bitrate < 100) {
+			fprintf(stderr, "Ignoring SIGUSR1, can't decrease bitrate below 100 kbit/sec (currently at %d kbit/sec)\n",
+				global_flags.x264_bitrate);
+		} else {
+			fprintf(stderr, "Decreasing bitrate to %d kbit/sec due to SIGUSR1.\n", new_bitrate);
+			global_flags.x264_bitrate = new_bitrate;
+			global_x264_encoder->change_bitrate(new_bitrate);
+		}
+	}
+}
+
 int main(int argc, char *argv[])
 {
 	parse_flags(PROGRAM_KAERU, argc, argv);
@@ -124,6 +159,7 @@ int main(int argc, char *argv[])
 		usage(PROGRAM_KAERU);
 		exit(1);
 	}
+	global_flags.num_cards = 1;  // For latency metrics.
 
 	av_register_all();
 	avformat_network_init();
@@ -148,6 +184,7 @@ int main(int argc, char *argv[])
 		audio_encoder->add_mux(http_mux.get());
 	}
 	x264_encoder.add_mux(http_mux.get());
+	global_x264_encoder = &x264_encoder;
 
 	FFmpegCapture video(argv[optind], global_flags.width, global_flags.height);
 	video.set_pixel_format(FFmpegCapture::PixelFormat_NV12);
@@ -161,6 +198,9 @@ int main(int argc, char *argv[])
 
 	httpd.start(9095);
 
+	signal(SIGUSR1, adjust_bitrate);
+	signal(SIGUSR2, adjust_bitrate);
+
 	for ( ;; ) {
 		sleep(3600);
 	}