1 #include "video_encoder.h"
11 #include "quicksync_encoder.h"
17 string generate_local_dump_filename(int frame)
19 time_t now = time(NULL);
21 localtime_r(&now, &now_tm);
24 strftime(timestamp, sizeof(timestamp), "%F-%T%z", &now_tm);
26 // Use the frame number to disambiguate between two cuts starting
27 // on the same second.
29 snprintf(filename, sizeof(filename), "%s%s-f%02d%s",
30 LOCAL_DUMP_PREFIX, timestamp, frame % 100, LOCAL_DUMP_SUFFIX);
36 VideoEncoder::VideoEncoder(QSurface *surface, const std::string &va_display, int width, int height, HTTPD *httpd)
37 : surface(surface), va_display(va_display), width(width), height(height), httpd(httpd)
41 string filename = generate_local_dump_filename(/*frame=*/0);
42 quicksync_encoder.reset(new QuickSyncEncoder(filename, surface, va_display, width, height, stream_mux.get()));
45 VideoEncoder::~VideoEncoder()
47 quicksync_encoder.reset(nullptr);
48 close_output_stream();
51 void VideoEncoder::do_cut(int frame)
53 string filename = generate_local_dump_filename(frame);
54 printf("Starting new recording: %s\n", filename.c_str());
55 quicksync_encoder->shutdown();
56 quicksync_encoder.reset(new QuickSyncEncoder(filename, surface, va_display, width, height, stream_mux.get()));
59 void VideoEncoder::add_audio(int64_t pts, std::vector<float> audio)
61 quicksync_encoder->add_audio(pts, audio);
64 bool VideoEncoder::begin_frame(GLuint *y_tex, GLuint *cbcr_tex)
66 return quicksync_encoder->begin_frame(y_tex, cbcr_tex);
69 RefCountedGLsync VideoEncoder::end_frame(int64_t pts, int64_t duration, const std::vector<RefCountedFrame> &input_frames)
71 return quicksync_encoder->end_frame(pts, duration, input_frames);
74 void VideoEncoder::open_output_stream()
76 AVFormatContext *avctx = avformat_alloc_context();
77 AVOutputFormat *oformat = av_guess_format(global_flags.stream_mux_name.c_str(), nullptr, nullptr);
78 assert(oformat != nullptr);
79 avctx->oformat = oformat;
84 if (global_flags.stream_audio_codec_name.empty()) {
85 codec_name = AUDIO_OUTPUT_CODEC_NAME;
86 bit_rate = DEFAULT_AUDIO_OUTPUT_BIT_RATE;
88 codec_name = global_flags.stream_audio_codec_name;
89 bit_rate = global_flags.stream_audio_codec_bitrate;
92 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
93 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, &VideoEncoder::write_packet_thunk, nullptr);
95 Mux::Codec video_codec;
96 if (global_flags.uncompressed_video_to_http) {
97 video_codec = Mux::CODEC_NV12;
99 video_codec = Mux::CODEC_H264;
102 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
103 AVCodec *codec_audio = avcodec_find_encoder_by_name(codec_name.c_str());
104 if (codec_audio == nullptr) {
105 fprintf(stderr, "ERROR: Could not find codec '%s'\n", codec_name.c_str());
109 int time_base = global_flags.stream_coarse_timebase ? COARSE_TIMEBASE : TIMEBASE;
110 stream_mux_writing_header = true;
111 stream_mux.reset(new Mux(avctx, width, height, video_codec, codec_audio, time_base, bit_rate, this));
112 stream_mux_writing_header = false;
113 httpd->set_header(stream_mux_header);
114 stream_mux_header.clear();
117 void VideoEncoder::close_output_stream()
122 int VideoEncoder::write_packet_thunk(void *opaque, uint8_t *buf, int buf_size)
124 VideoEncoder *video_encoder = (VideoEncoder *)opaque;
125 return video_encoder->write_packet(buf, buf_size);
128 int VideoEncoder::write_packet(uint8_t *buf, int buf_size)
130 if (stream_mux_writing_header) {
131 stream_mux_header.append((char *)buf, buf_size);
133 httpd->add_data((char *)buf, buf_size, stream_mux_writing_keyframes);
134 stream_mux_writing_keyframes = false;