1 #include "video_encoder.h"
11 #include <libavutil/mem.h>
14 #include "audio_encoder.h"
16 #include "ffmpeg_raii.h"
20 #include "quicksync_encoder.h"
22 #include "x264_encoder.h"
24 class RefCountedFrame;
27 using namespace movit;
31 string generate_local_dump_filename(int frame)
33 time_t now = time(NULL);
35 localtime_r(&now, &now_tm);
38 strftime(timestamp, sizeof(timestamp), "%F-%T%z", &now_tm);
40 // Use the frame number to disambiguate between two cuts starting
41 // on the same second.
43 snprintf(filename, sizeof(filename), "%s/%s%s-f%02d%s",
44 global_flags.recording_dir.c_str(),
45 LOCAL_DUMP_PREFIX, timestamp, frame % 100, LOCAL_DUMP_SUFFIX);
51 VideoEncoder::VideoEncoder(ResourcePool *resource_pool, QSurface *surface, const std::string &va_display, int width, int height, HTTPD *httpd, DiskSpaceEstimator *disk_space_estimator)
52 : resource_pool(resource_pool), surface(surface), va_display(va_display), width(width), height(height), httpd(httpd), disk_space_estimator(disk_space_estimator)
54 oformat = av_guess_format(global_flags.stream_mux_name.c_str(), nullptr, nullptr);
55 assert(oformat != nullptr);
56 if (global_flags.stream_audio_codec_name.empty()) {
57 stream_audio_encoder.reset(new AudioEncoder(AUDIO_OUTPUT_CODEC_NAME, DEFAULT_AUDIO_OUTPUT_BIT_RATE, oformat));
59 stream_audio_encoder.reset(new AudioEncoder(global_flags.stream_audio_codec_name, global_flags.stream_audio_codec_bitrate, oformat));
61 if (global_flags.x264_video_to_http || global_flags.x264_video_to_disk) {
62 x264_encoder.reset(new X264Encoder(oformat));
65 string filename = generate_local_dump_filename(/*frame=*/0);
66 quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, oformat, x264_encoder.get(), disk_space_estimator));
69 stream_audio_encoder->add_mux(stream_mux.get());
70 quicksync_encoder->set_stream_mux(stream_mux.get());
71 if (global_flags.x264_video_to_http) {
72 x264_encoder->add_mux(stream_mux.get());
76 VideoEncoder::~VideoEncoder()
78 quicksync_encoder->shutdown();
79 x264_encoder.reset(nullptr);
80 quicksync_encoder->close_file();
81 quicksync_encoder.reset(nullptr);
82 while (quicksync_encoders_in_shutdown.load() > 0) {
87 void VideoEncoder::do_cut(int frame)
89 string filename = generate_local_dump_filename(frame);
90 printf("Starting new recording: %s\n", filename.c_str());
92 // Do the shutdown of the old encoder in a separate thread, since it can
93 // take some time (it needs to wait for all the frames in the queue to be
94 // done encoding, for one) and we are running on the main mixer thread.
95 // However, since this means both encoders could be sending packets at
96 // the same time, it means pts could come out of order to the stream mux,
97 // and we need to plug it until the shutdown is complete.
99 lock_guard<mutex> lock(qs_mu);
100 QuickSyncEncoder *old_encoder = quicksync_encoder.release(); // When we go C++14, we can use move capture instead.
101 X264Encoder *old_x264_encoder = nullptr;
102 if (global_flags.x264_video_to_disk) {
103 old_x264_encoder = x264_encoder.release();
105 thread([old_encoder, old_x264_encoder, this]{
106 old_encoder->shutdown();
107 delete old_x264_encoder;
108 old_encoder->close_file();
109 stream_mux->unplug();
111 // We cannot delete the encoder here, as this thread has no OpenGL context.
112 // We'll deal with it in begin_frame().
113 lock_guard<mutex> lock(qs_mu);
114 qs_needing_cleanup.emplace_back(old_encoder);
117 if (global_flags.x264_video_to_disk) {
118 x264_encoder.reset(new X264Encoder(oformat));
119 if (global_flags.x264_video_to_http) {
120 x264_encoder->add_mux(stream_mux.get());
122 if (overriding_bitrate != 0) {
123 x264_encoder->change_bitrate(overriding_bitrate);
127 quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, oformat, x264_encoder.get(), disk_space_estimator));
128 quicksync_encoder->set_stream_mux(stream_mux.get());
131 void VideoEncoder::change_x264_bitrate(unsigned rate_kbit)
133 overriding_bitrate = rate_kbit;
134 x264_encoder->change_bitrate(rate_kbit);
137 void VideoEncoder::add_audio(int64_t pts, std::vector<float> audio)
139 lock_guard<mutex> lock(qs_mu);
140 quicksync_encoder->add_audio(pts, audio);
141 stream_audio_encoder->encode_audio(audio, pts + quicksync_encoder->global_delay());
144 bool VideoEncoder::is_zerocopy() const
146 lock_guard<mutex> lock(qs_mu);
147 return quicksync_encoder->is_zerocopy();
150 bool VideoEncoder::begin_frame(int64_t pts, int64_t duration, movit::YCbCrLumaCoefficients ycbcr_coefficients, const std::vector<RefCountedFrame> &input_frames, GLuint *y_tex, GLuint *cbcr_tex)
152 lock_guard<mutex> lock(qs_mu);
153 qs_needing_cleanup.clear(); // Since we have an OpenGL context here, and are called regularly.
154 return quicksync_encoder->begin_frame(pts, duration, ycbcr_coefficients, input_frames, y_tex, cbcr_tex);
157 RefCountedGLsync VideoEncoder::end_frame()
159 lock_guard<mutex> lock(qs_mu);
160 return quicksync_encoder->end_frame();
163 void VideoEncoder::open_output_stream()
165 AVFormatContext *avctx = avformat_alloc_context();
166 avctx->oformat = oformat;
168 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
169 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
170 avctx->pb->write_data_type = &VideoEncoder::write_packet2_thunk;
171 avctx->pb->ignore_boundary_point = 1;
173 Mux::Codec video_codec;
174 if (global_flags.uncompressed_video_to_http) {
175 video_codec = Mux::CODEC_NV12;
177 video_codec = Mux::CODEC_H264;
180 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
182 string video_extradata;
183 if (global_flags.x264_video_to_http || global_flags.x264_video_to_disk) {
184 video_extradata = x264_encoder->get_global_headers();
187 int time_base = global_flags.stream_coarse_timebase ? COARSE_TIMEBASE : TIMEBASE;
188 stream_mux.reset(new Mux(avctx, width, height, video_codec, video_extradata, stream_audio_encoder->get_codec_parameters().get(), time_base,
189 /*write_callback=*/nullptr, { &stream_mux_metrics }));
190 stream_mux_metrics.init({{ "destination", "http" }});
193 int VideoEncoder::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
195 VideoEncoder *video_encoder = (VideoEncoder *)opaque;
196 return video_encoder->write_packet2(buf, buf_size, type, time);
199 int VideoEncoder::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
201 if (type == AVIO_DATA_MARKER_SYNC_POINT || type == AVIO_DATA_MARKER_BOUNDARY_POINT) {
202 seen_sync_markers = true;
203 } else if (type == AVIO_DATA_MARKER_UNKNOWN && !seen_sync_markers) {
204 // We don't know if this is a keyframe or not (the muxer could
205 // avoid marking it), so we just have to make the best of it.
206 type = AVIO_DATA_MARKER_SYNC_POINT;
209 if (type == AVIO_DATA_MARKER_HEADER) {
210 stream_mux_header.append((char *)buf, buf_size);
211 httpd->set_header(stream_mux_header);
213 httpd->add_data((char *)buf, buf_size, type == AVIO_DATA_MARKER_SYNC_POINT);