git.sesse.net Git - nageru/blob - video_encoder.cpp

   1 #include "video_encoder.h"
   2
   3 #include <assert.h>
   4
   5 #include <string>
   6
   7 #include "defs.h"
   8 #include "flags.h"
   9 #include "httpd.h"
  10 #include "timebase.h"
  11 #include "quicksync_encoder.h"
  12 #include "x264_encoder.h"
  13
  14 using namespace std;
  15
  16 namespace {
  17
  18 string generate_local_dump_filename(int frame)
  19 {
  20         time_t now = time(NULL);
  21         tm now_tm;
  22         localtime_r(&now, &now_tm);
  23
  24         char timestamp[256];
  25         strftime(timestamp, sizeof(timestamp), "%F-%T%z", &now_tm);
  26
  27         // Use the frame number to disambiguate between two cuts starting
  28         // on the same second.
  29         char filename[256];
  30         snprintf(filename, sizeof(filename), "%s%s-f%02d%s",
  31                 LOCAL_DUMP_PREFIX, timestamp, frame % 100, LOCAL_DUMP_SUFFIX);
  32         return filename;
  33 }
  34
  35 }  // namespace
  36
  37 VideoEncoder::VideoEncoder(QSurface *surface, const std::string &va_display, int width, int height, HTTPD *httpd)
  38         : surface(surface), va_display(va_display), width(width), height(height), httpd(httpd)
  39 {
  40         open_output_stream();
  41
  42         if (global_flags.stream_audio_codec_name.empty()) {
  43                 stream_audio_encoder.reset(new AudioEncoder(AUDIO_OUTPUT_CODEC_NAME, DEFAULT_AUDIO_OUTPUT_BIT_RATE));
  44         } else {
  45                 stream_audio_encoder.reset(new AudioEncoder(global_flags.stream_audio_codec_name, global_flags.stream_audio_codec_bitrate));
  46         }
  47         stream_audio_encoder->add_mux(stream_mux.get());
  48
  49         if (global_flags.x264_video_to_http) {
  50                 x264_encoder.reset(new X264Encoder(stream_mux.get()));
  51         }
  52
  53         string filename = generate_local_dump_filename(/*frame=*/0);
  54         quicksync_encoder.reset(new QuickSyncEncoder(filename, surface, va_display, width, height, stream_mux.get(), stream_audio_encoder.get(), x264_encoder.get()));
  55 }
  56
  57 VideoEncoder::~VideoEncoder()
  58 {
  59         quicksync_encoder.reset(nullptr);
  60         close_output_stream();
  61 }
  62
  63 void VideoEncoder::do_cut(int frame)
  64 {
  65         string filename = generate_local_dump_filename(frame);
  66         printf("Starting new recording: %s\n", filename.c_str());
  67         quicksync_encoder->shutdown();
  68         quicksync_encoder.reset(new QuickSyncEncoder(filename, surface, va_display, width, height, stream_mux.get(), stream_audio_encoder.get(), x264_encoder.get()));
  69 }
  70
  71 void VideoEncoder::add_audio(int64_t pts, std::vector<float> audio)
  72 {
  73         quicksync_encoder->add_audio(pts, audio);
  74 }
  75
  76 bool VideoEncoder::begin_frame(GLuint *y_tex, GLuint *cbcr_tex)
  77 {
  78         return quicksync_encoder->begin_frame(y_tex, cbcr_tex);
  79 }
  80
  81 RefCountedGLsync VideoEncoder::end_frame(int64_t pts, int64_t duration, const std::vector<RefCountedFrame> &input_frames)
  82 {
  83         return quicksync_encoder->end_frame(pts, duration, input_frames);
  84 }
  85
  86 void VideoEncoder::open_output_stream()
  87 {
  88         AVFormatContext *avctx = avformat_alloc_context();
  89         AVOutputFormat *oformat = av_guess_format(global_flags.stream_mux_name.c_str(), nullptr, nullptr);
  90         assert(oformat != nullptr);
  91         avctx->oformat = oformat;
  92
  93         string codec_name;
  94         int bit_rate;
  95
  96         if (global_flags.stream_audio_codec_name.empty()) {
  97                 codec_name = AUDIO_OUTPUT_CODEC_NAME;
  98                 bit_rate = DEFAULT_AUDIO_OUTPUT_BIT_RATE;
  99         } else {
 100                 codec_name = global_flags.stream_audio_codec_name;
 101                 bit_rate = global_flags.stream_audio_codec_bitrate;
 102         }
 103
 104         uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
 105         avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, &VideoEncoder::write_packet_thunk, nullptr);
 106
 107         Mux::Codec video_codec;
 108         if (global_flags.uncompressed_video_to_http) {
 109                 video_codec = Mux::CODEC_NV12;
 110         } else {
 111                 video_codec = Mux::CODEC_H264;
 112         }
 113
 114         avctx->flags = AVFMT_FLAG_CUSTOM_IO;
 115         AVCodec *codec_audio = avcodec_find_encoder_by_name(codec_name.c_str());
 116         if (codec_audio == nullptr) {
 117                 fprintf(stderr, "ERROR: Could not find codec '%s'\n", codec_name.c_str());
 118                 exit(1);
 119         }
 120
 121         int time_base = global_flags.stream_coarse_timebase ? COARSE_TIMEBASE : TIMEBASE;
 122         stream_mux_writing_header = true;
 123         stream_mux.reset(new Mux(avctx, width, height, video_codec, codec_audio, time_base, bit_rate, this));
 124         stream_mux_writing_header = false;
 125         httpd->set_header(stream_mux_header);
 126         stream_mux_header.clear();
 127 }
 128
 129 void VideoEncoder::close_output_stream()
 130 {
 131         stream_mux.reset();
 132 }
 133
 134 int VideoEncoder::write_packet_thunk(void *opaque, uint8_t *buf, int buf_size)
 135 {
 136         VideoEncoder *video_encoder = (VideoEncoder *)opaque;
 137         return video_encoder->write_packet(buf, buf_size);
 138 }
 139
 140 int VideoEncoder::write_packet(uint8_t *buf, int buf_size)
 141 {
 142         if (stream_mux_writing_header) {
 143                 stream_mux_header.append((char *)buf, buf_size);
 144         } else {
 145                 httpd->add_data((char *)buf, buf_size, stream_mux_writing_keyframes);
 146                 stream_mux_writing_keyframes = false;
 147         }
 148         return buf_size;
 149 }
 150