-// 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"
+#include "basic_stats.h"
#include "defs.h"
#include "flags.h"
#include "ffmpeg_capture.h"
#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;
+int frame_num = 0;
+BasicStats *global_basic_stats = nullptr;
+MuxMetrics stream_mux_metrics;
int write_packet(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
{
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;
}
-void video_frame_callback(FFmpegCapture *video, X264Encoder *x264_encoder, int64_t pts, AVRational timebase, uint16_t timecode,
+void video_frame_callback(FFmpegCapture *video, X264Encoder *x264_encoder, AudioEncoder *audio_encoder,
+ int64_t video_pts, AVRational video_timebase,
+ int64_t audio_pts, AVRational audio_timebase,
+ uint16_t timecode,
FrameAllocator::Frame video_frame, size_t video_offset, VideoFormat video_format,
FrameAllocator::Frame audio_frame, size_t audio_offset, AudioFormat audio_format)
{
- if (pts >= 0 && video_frame.len > 0) {
- pts = av_rescale_q(pts, timebase, AVRational{ 1, TIMEBASE });
- int64_t frame_duration = TIMEBASE * video_format.frame_rate_nom / video_format.frame_rate_den;
- x264_encoder->add_frame(pts, frame_duration, video->get_current_frame_ycbcr_format().luma_coefficients, video_frame.data + video_offset, ReceivedTimestamps());
+ 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_den / video_format.frame_rate_nom;
+ x264_encoder->add_frame(video_pts, frame_duration, video->get_current_frame_ycbcr_format().luma_coefficients, video_frame.data + video_offset, ts);
+ global_basic_stats->update(frame_num++, /*dropped_frames=*/0);
}
+ if (audio_frame.len > 0) {
+ // FFmpegCapture takes care of this for us.
+ assert(audio_format.num_channels == 2);
+ assert(audio_format.sample_rate == OUTPUT_FREQUENCY);
+
+ // TODO: Reduce some duplication against AudioMixer here.
+ size_t num_samples = audio_frame.len / (audio_format.bits_per_sample / 8);
+ vector<float> float_samples;
+ float_samples.resize(num_samples);
+ if (audio_format.bits_per_sample == 16) {
+ const int16_t *src = (const int16_t *)audio_frame.data;
+ float *dst = &float_samples[0];
+ for (size_t i = 0; i < num_samples; ++i) {
+ *dst++ = le16toh(*src++) * (1.0f / 32768.0f);
+ }
+ } else if (audio_format.bits_per_sample == 32) {
+ const int32_t *src = (const int32_t *)audio_frame.data;
+ float *dst = &float_samples[0];
+ for (size_t i = 0; i < num_samples; ++i) {
+ *dst++ = le32toh(*src++) * (1.0f / 2147483648.0f);
+ }
+ } else {
+ assert(false);
+ }
+ audio_pts = av_rescale_q(audio_pts, audio_timebase, AVRational{ 1, TIMEBASE });
+ audio_encoder->encode_audio(float_samples, audio_pts);
+ }
if (video_frame.owner) {
video_frame.owner->release_frame(video_frame);
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);
usage(PROGRAM_KAERU);
exit(1);
}
+ global_flags.num_cards = 1; // For latency metrics.
av_register_all();
avformat_network_init();
assert(oformat != nullptr);
unique_ptr<AudioEncoder> audio_encoder;
- if (global_flags.stream_audio_codec_name.empty()) {
- audio_encoder.reset(new AudioEncoder(AUDIO_OUTPUT_CODEC_NAME, DEFAULT_AUDIO_OUTPUT_BIT_RATE, oformat));
- } else {
- audio_encoder.reset(new AudioEncoder(global_flags.stream_audio_codec_name, global_flags.stream_audio_codec_bitrate, oformat));
+ if (global_flags.transcode_audio) {
+ if (global_flags.stream_audio_codec_name.empty()) {
+ audio_encoder.reset(new AudioEncoder(AUDIO_OUTPUT_CODEC_NAME, DEFAULT_AUDIO_OUTPUT_BIT_RATE, oformat));
+ } else {
+ audio_encoder.reset(new AudioEncoder(global_flags.stream_audio_codec_name, global_flags.stream_audio_codec_bitrate, oformat));
+ }
}
X264Encoder x264_encoder(oformat);
unique_ptr<Mux> http_mux = create_mux(&httpd, oformat, &x264_encoder, audio_encoder.get());
+ if (global_flags.transcode_audio) {
+ 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);
- video.set_frame_callback(bind(video_frame_callback, &video, &x264_encoder, _1, _2, _3, _4, _5, _6, _7, _8, _9));
- video.set_audio_callback(bind(audio_frame_callback, http_mux.get(), _1, _2));
+ video.set_frame_callback(bind(video_frame_callback, &video, &x264_encoder, audio_encoder.get(), _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11));
+ if (!global_flags.transcode_audio) {
+ video.set_audio_callback(bind(audio_frame_callback, http_mux.get(), _1, _2));
+ }
video.configure_card();
video.start_bm_capture();
video.change_rate(2.0); // Be sure never to really fall behind, but also don't dump huge amounts of stuff onto x264.
+ BasicStats basic_stats(/*verbose=*/false);
+ global_basic_stats = &basic_stats;
httpd.start(9095);
+ signal(SIGUSR1, adjust_bitrate);
+ signal(SIGUSR2, adjust_bitrate);
+
for ( ;; ) {
sleep(3600);
}
projects / nageru / blobdiff