X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=video_encoder.cpp;h=2b8fcd5edec9e0a9ea3a79aed79d39d02494375d;hb=817fffe1ef3bd87f2387395f49487cf5255d8daf;hp=39bc2641932dce864a6a0c7ba5e18feb80ae677d;hpb=c4c5e2df2b1ef88fa20b71ae981ae6462d84b63c;p=nageru diff --git a/video_encoder.cpp b/video_encoder.cpp index 39bc264..2b8fcd5 100644 --- a/video_encoder.cpp +++ b/video_encoder.cpp @@ -1,11 +1,30 @@ #include "video_encoder.h" +#include +#include +#include +#include #include +#include +extern "C" { +#include +} + +#include "audio_encoder.h" #include "defs.h" +#include "ffmpeg_raii.h" +#include "flags.h" +#include "httpd.h" +#include "mux.h" #include "quicksync_encoder.h" +#include "timebase.h" +#include "x264_encoder.h" + +class RefCountedFrame; using namespace std; +using namespace movit; namespace { @@ -15,52 +34,192 @@ string generate_local_dump_filename(int frame) tm now_tm; localtime_r(&now, &now_tm); - char timestamp[256]; + char timestamp[64]; strftime(timestamp, sizeof(timestamp), "%F-%T%z", &now_tm); // Use the frame number to disambiguate between two cuts starting // on the same second. char filename[256]; - snprintf(filename, sizeof(filename), "%s%s-f%02d%s", + snprintf(filename, sizeof(filename), "%s/%s%s-f%02d%s", + global_flags.recording_dir.c_str(), LOCAL_DUMP_PREFIX, timestamp, frame % 100, LOCAL_DUMP_SUFFIX); return filename; } } // namespace -VideoEncoder::VideoEncoder(QSurface *surface, const std::string &va_display, int width, int height, HTTPD *httpd) - : surface(surface), va_display(va_display), width(width), height(height), httpd(httpd) +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) { - quicksync_encoder.reset(new QuickSyncEncoder(surface, va_display, width, height, httpd)); - quicksync_encoder->open_output_file(generate_local_dump_filename(/*frame=*/0).c_str()); + oformat = av_guess_format(global_flags.stream_mux_name.c_str(), nullptr, nullptr); + assert(oformat != nullptr); + if (global_flags.stream_audio_codec_name.empty()) { + stream_audio_encoder.reset(new AudioEncoder(AUDIO_OUTPUT_CODEC_NAME, DEFAULT_AUDIO_OUTPUT_BIT_RATE, oformat)); + } else { + stream_audio_encoder.reset(new AudioEncoder(global_flags.stream_audio_codec_name, global_flags.stream_audio_codec_bitrate, oformat)); + } + if (global_flags.x264_video_to_http || global_flags.x264_video_to_disk) { + x264_encoder.reset(new X264Encoder(oformat)); + } + + string filename = generate_local_dump_filename(/*frame=*/0); + quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, oformat, x264_encoder.get(), disk_space_estimator)); + + open_output_stream(); + stream_audio_encoder->add_mux(stream_mux.get()); + quicksync_encoder->set_stream_mux(stream_mux.get()); + if (global_flags.x264_video_to_http) { + x264_encoder->add_mux(stream_mux.get()); + } } VideoEncoder::~VideoEncoder() { + quicksync_encoder->shutdown(); + x264_encoder.reset(nullptr); + quicksync_encoder->close_file(); quicksync_encoder.reset(nullptr); + while (quicksync_encoders_in_shutdown.load() > 0) { + usleep(10000); + } } void VideoEncoder::do_cut(int frame) { string filename = generate_local_dump_filename(frame); printf("Starting new recording: %s\n", filename.c_str()); - quicksync_encoder->close_output_file(); - quicksync_encoder->shutdown(); - quicksync_encoder.reset(new QuickSyncEncoder(surface, va_display, width, height, httpd)); - quicksync_encoder->open_output_file(filename.c_str()); + + // Do the shutdown of the old encoder in a separate thread, since it can + // take some time (it needs to wait for all the frames in the queue to be + // done encoding, for one) and we are running on the main mixer thread. + // However, since this means both encoders could be sending packets at + // the same time, it means pts could come out of order to the stream mux, + // and we need to plug it until the shutdown is complete. + stream_mux->plug(); + lock(qs_mu, qs_audio_mu); + lock_guard lock1(qs_mu, adopt_lock), lock2(qs_audio_mu, adopt_lock); + QuickSyncEncoder *old_encoder = quicksync_encoder.release(); // When we go C++14, we can use move capture instead. + X264Encoder *old_x264_encoder = nullptr; + if (global_flags.x264_video_to_disk) { + old_x264_encoder = x264_encoder.release(); + } + thread([old_encoder, old_x264_encoder, this]{ + old_encoder->shutdown(); + delete old_x264_encoder; + old_encoder->close_file(); + stream_mux->unplug(); + + // We cannot delete the encoder here, as this thread has no OpenGL context. + // We'll deal with it in begin_frame(). + lock_guard lock(qs_mu); + qs_needing_cleanup.emplace_back(old_encoder); + }).detach(); + + if (global_flags.x264_video_to_disk) { + x264_encoder.reset(new X264Encoder(oformat)); + if (global_flags.x264_video_to_http) { + x264_encoder->add_mux(stream_mux.get()); + } + if (overriding_bitrate != 0) { + x264_encoder->change_bitrate(overriding_bitrate); + } + } + + quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, oformat, x264_encoder.get(), disk_space_estimator)); + quicksync_encoder->set_stream_mux(stream_mux.get()); +} + +void VideoEncoder::change_x264_bitrate(unsigned rate_kbit) +{ + overriding_bitrate = rate_kbit; + x264_encoder->change_bitrate(rate_kbit); } void VideoEncoder::add_audio(int64_t pts, std::vector audio) { - quicksync_encoder->add_audio(pts, audio); + // Take only qs_audio_mu, since add_audio() is thread safe + // (we can only conflict with do_cut(), which takes qs_audio_mu) + // and we don't want to contend with begin_frame(). + { + lock_guard lock(qs_audio_mu); + quicksync_encoder->add_audio(pts, audio); + } + stream_audio_encoder->encode_audio(audio, pts + quicksync_encoder->global_delay()); +} + +bool VideoEncoder::is_zerocopy() const +{ + // Explicitly do _not_ take qs_mu; this is called from the mixer, + // and qs_mu might be contended. is_zerocopy() is thread safe + // and never called in parallel with do_cut() (both happen only + // from the mixer thread). + return quicksync_encoder->is_zerocopy(); } -bool VideoEncoder::begin_frame(GLuint *y_tex, GLuint *cbcr_tex) +bool VideoEncoder::begin_frame(int64_t pts, int64_t duration, movit::YCbCrLumaCoefficients ycbcr_coefficients, const std::vector &input_frames, GLuint *y_tex, GLuint *cbcr_tex) { - return quicksync_encoder->begin_frame(y_tex, cbcr_tex); + lock_guard lock(qs_mu); + qs_needing_cleanup.clear(); // Since we have an OpenGL context here, and are called regularly. + return quicksync_encoder->begin_frame(pts, duration, ycbcr_coefficients, input_frames, y_tex, cbcr_tex); } -RefCountedGLsync VideoEncoder::end_frame(int64_t pts, int64_t duration, const std::vector &input_frames) +RefCountedGLsync VideoEncoder::end_frame() { - return quicksync_encoder->end_frame(pts, duration, input_frames); + lock_guard lock(qs_mu); + return quicksync_encoder->end_frame(); } + +void VideoEncoder::open_output_stream() +{ + AVFormatContext *avctx = avformat_alloc_context(); + avctx->oformat = oformat; + + 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; + + Mux::Codec video_codec; + if (global_flags.uncompressed_video_to_http) { + video_codec = Mux::CODEC_NV12; + } else { + video_codec = Mux::CODEC_H264; + } + + avctx->flags = AVFMT_FLAG_CUSTOM_IO; + + string video_extradata; + if (global_flags.x264_video_to_http || global_flags.x264_video_to_disk) { + video_extradata = x264_encoder->get_global_headers(); + } + + stream_mux.reset(new Mux(avctx, width, height, video_codec, video_extradata, stream_audio_encoder->get_codec_parameters().get(), COARSE_TIMEBASE, + /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, { &stream_mux_metrics })); + stream_mux_metrics.init({{ "destination", "http" }}); +} + +int VideoEncoder::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time) +{ + VideoEncoder *video_encoder = (VideoEncoder *)opaque; + return video_encoder->write_packet2(buf, buf_size, type, time); +} + +int VideoEncoder::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time) +{ + if (type == AVIO_DATA_MARKER_SYNC_POINT || type == AVIO_DATA_MARKER_BOUNDARY_POINT) { + seen_sync_markers = true; + } else if (type == AVIO_DATA_MARKER_UNKNOWN && !seen_sync_markers) { + // We don't know if this is a keyframe or not (the muxer could + // avoid marking it), so we just have to make the best of it. + type = AVIO_DATA_MARKER_SYNC_POINT; + } + + if (type == AVIO_DATA_MARKER_HEADER) { + stream_mux_header.append((char *)buf, buf_size); + httpd->set_header(HTTPD::MAIN_STREAM, stream_mux_header); + } else { + httpd->add_data(HTTPD::MAIN_STREAM, (char *)buf, buf_size, type == AVIO_DATA_MARKER_SYNC_POINT, time, AVRational{ AV_TIME_BASE, 1 }); + } + return buf_size; +} +