1 #include "video_encoder.h"
11 #include "quicksync_encoder.h"
12 #include "x264_encoder.h"
15 using namespace movit;
19 string generate_local_dump_filename(int frame)
21 time_t now = time(NULL);
23 localtime_r(&now, &now_tm);
26 strftime(timestamp, sizeof(timestamp), "%F-%T%z", &now_tm);
28 // Use the frame number to disambiguate between two cuts starting
29 // on the same second.
31 snprintf(filename, sizeof(filename), "%s%s-f%02d%s",
32 LOCAL_DUMP_PREFIX, timestamp, frame % 100, LOCAL_DUMP_SUFFIX);
38 VideoEncoder::VideoEncoder(ResourcePool *resource_pool, QSurface *surface, const std::string &va_display, int width, int height, HTTPD *httpd)
39 : resource_pool(resource_pool), surface(surface), va_display(va_display), width(width), height(height), httpd(httpd)
41 oformat = av_guess_format(global_flags.stream_mux_name.c_str(), nullptr, nullptr);
42 assert(oformat != nullptr);
43 if (global_flags.stream_audio_codec_name.empty()) {
44 stream_audio_encoder.reset(new AudioEncoder(AUDIO_OUTPUT_CODEC_NAME, DEFAULT_AUDIO_OUTPUT_BIT_RATE, oformat));
46 stream_audio_encoder.reset(new AudioEncoder(global_flags.stream_audio_codec_name, global_flags.stream_audio_codec_bitrate, oformat));
48 if (global_flags.x264_video_to_http) {
49 x264_encoder.reset(new X264Encoder(oformat));
52 string filename = generate_local_dump_filename(/*frame=*/0);
53 quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, oformat, x264_encoder.get()));
56 stream_audio_encoder->add_mux(stream_mux.get());
57 quicksync_encoder->set_stream_mux(stream_mux.get());
58 if (global_flags.x264_video_to_http) {
59 x264_encoder->set_mux(stream_mux.get());
63 VideoEncoder::~VideoEncoder()
65 quicksync_encoder.reset(nullptr);
66 while (quicksync_encoders_in_shutdown.load() > 0) {
71 void VideoEncoder::do_cut(int frame)
73 string filename = generate_local_dump_filename(frame);
74 printf("Starting new recording: %s\n", filename.c_str());
76 // Do the shutdown of the old encoder in a separate thread, since it can
77 // take some time (it needs to wait for all the frames in the queue to be
78 // done encoding, for one) and we are running on the main mixer thread.
79 // However, since this means both encoders could be sending packets at
80 // the same time, it means pts could come out of order to the stream mux,
81 // and we need to plug it until the shutdown is complete.
83 lock_guard<mutex> lock(qs_mu);
84 QuickSyncEncoder *old_encoder = quicksync_encoder.release(); // When we go C++14, we can use move capture instead.
85 thread([old_encoder, this]{
86 old_encoder->shutdown();
89 // We cannot delete the encoder here, as this thread has no OpenGL context.
90 // We'll deal with it in begin_frame().
91 lock_guard<mutex> lock(qs_mu);
92 qs_needing_cleanup.emplace_back(old_encoder);
95 quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, oformat, x264_encoder.get()));
96 quicksync_encoder->set_stream_mux(stream_mux.get());
99 void VideoEncoder::change_x264_bitrate(unsigned rate_kbit)
101 x264_encoder->change_bitrate(rate_kbit);
104 void VideoEncoder::add_audio(int64_t pts, std::vector<float> audio)
106 lock_guard<mutex> lock(qs_mu);
107 quicksync_encoder->add_audio(pts, audio);
108 stream_audio_encoder->encode_audio(audio, pts + quicksync_encoder->global_delay());
111 bool VideoEncoder::begin_frame(GLuint *y_tex, GLuint *cbcr_tex)
113 lock_guard<mutex> lock(qs_mu);
114 qs_needing_cleanup.clear(); // Since we have an OpenGL context here, and are called regularly.
115 return quicksync_encoder->begin_frame(y_tex, cbcr_tex);
118 RefCountedGLsync VideoEncoder::end_frame(int64_t pts, int64_t duration, const std::vector<RefCountedFrame> &input_frames)
120 lock_guard<mutex> lock(qs_mu);
121 return quicksync_encoder->end_frame(pts, duration, input_frames);
124 void VideoEncoder::open_output_stream()
126 AVFormatContext *avctx = avformat_alloc_context();
127 avctx->oformat = oformat;
129 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
130 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
131 avctx->pb->write_data_type = &VideoEncoder::write_packet2_thunk;
132 avctx->pb->ignore_boundary_point = 1;
134 Mux::Codec video_codec;
135 if (global_flags.uncompressed_video_to_http) {
136 video_codec = Mux::CODEC_NV12;
138 video_codec = Mux::CODEC_H264;
141 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
143 string video_extradata;
144 if (global_flags.x264_video_to_http) {
145 video_extradata = x264_encoder->get_global_headers();
148 int time_base = global_flags.stream_coarse_timebase ? COARSE_TIMEBASE : TIMEBASE;
149 stream_mux.reset(new Mux(avctx, width, height, video_codec, video_extradata, stream_audio_encoder->get_codec_parameters().get(), time_base));
152 int VideoEncoder::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
154 VideoEncoder *video_encoder = (VideoEncoder *)opaque;
155 return video_encoder->write_packet2(buf, buf_size, type, time);
158 int VideoEncoder::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
160 if (type == AVIO_DATA_MARKER_HEADER) {
161 stream_mux_header.append((char *)buf, buf_size);
162 httpd->set_header(stream_mux_header);
164 httpd->add_data((char *)buf, buf_size, type == AVIO_DATA_MARKER_SYNC_POINT);