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 using namespace movit;
  16
  17 namespace {
  18
  19 string generate_local_dump_filename(int frame)
  20 {
  21         time_t now = time(NULL);
  22         tm now_tm;
  23         localtime_r(&now, &now_tm);
  24
  25         char timestamp[256];
  26         strftime(timestamp, sizeof(timestamp), "%F-%T%z", &now_tm);
  27
  28         // Use the frame number to disambiguate between two cuts starting
  29         // on the same second.
  30         char filename[256];
  31         snprintf(filename, sizeof(filename), "%s%s-f%02d%s",
  32                 LOCAL_DUMP_PREFIX, timestamp, frame % 100, LOCAL_DUMP_SUFFIX);
  33         return filename;
  34 }
  35
  36 }  // namespace
  37
  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)
  40 {
  41         open_output_stream();
  42
  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));
  45         } else {
  46                 stream_audio_encoder.reset(new AudioEncoder(global_flags.stream_audio_codec_name, global_flags.stream_audio_codec_bitrate));
  47         }
  48         stream_audio_encoder->add_mux(stream_mux.get());
  49
  50         if (global_flags.x264_video_to_http) {
  51                 x264_encoder.reset(new X264Encoder(stream_mux.get()));
  52         }
  53
  54         string filename = generate_local_dump_filename(/*frame=*/0);
  55         quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, stream_mux.get(), stream_audio_encoder.get(), x264_encoder.get()));
  56 }
  57
  58 VideoEncoder::~VideoEncoder()
  59 {
  60         quicksync_encoder.reset(nullptr);
  61         close_output_stream();
  62 }
  63
  64 void VideoEncoder::do_cut(int frame)
  65 {
  66         string filename = generate_local_dump_filename(frame);
  67         printf("Starting new recording: %s\n", filename.c_str());
  68         quicksync_encoder->shutdown();
  69         quicksync_encoder.reset(new QuickSyncEncoder(filename, resource_pool, surface, va_display, width, height, stream_mux.get(), stream_audio_encoder.get(), x264_encoder.get()));
  70 }
  71
  72 void VideoEncoder::add_audio(int64_t pts, std::vector<float> audio)
  73 {
  74         quicksync_encoder->add_audio(pts, audio);
  75 }
  76
  77 bool VideoEncoder::begin_frame(GLuint *y_tex, GLuint *cbcr_tex)
  78 {
  79         return quicksync_encoder->begin_frame(y_tex, cbcr_tex);
  80 }
  81
  82 RefCountedGLsync VideoEncoder::end_frame(int64_t pts, int64_t duration, const std::vector<RefCountedFrame> &input_frames)
  83 {
  84         return quicksync_encoder->end_frame(pts, duration, input_frames);
  85 }
  86
  87 void VideoEncoder::open_output_stream()
  88 {
  89         AVFormatContext *avctx = avformat_alloc_context();
  90         AVOutputFormat *oformat = av_guess_format(global_flags.stream_mux_name.c_str(), nullptr, nullptr);
  91         assert(oformat != nullptr);
  92         avctx->oformat = oformat;
  93
  94         uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
  95         avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, &VideoEncoder::write_packet_thunk, nullptr);
  96
  97         Mux::Codec video_codec;
  98         if (global_flags.uncompressed_video_to_http) {
  99                 video_codec = Mux::CODEC_NV12;
 100         } else {
 101                 video_codec = Mux::CODEC_H264;
 102         }
 103
 104         avctx->flags = AVFMT_FLAG_CUSTOM_IO;
 105
 106         int time_base = global_flags.stream_coarse_timebase ? COARSE_TIMEBASE : TIMEBASE;
 107         stream_mux_writing_header = true;
 108         stream_mux.reset(new Mux(avctx, width, height, video_codec, stream_audio_encoder->get_ctx(), time_base, this));
 109         stream_mux_writing_header = false;
 110         httpd->set_header(stream_mux_header);
 111         stream_mux_header.clear();
 112 }
 113
 114 void VideoEncoder::close_output_stream()
 115 {
 116         stream_mux.reset();
 117 }
 118
 119 int VideoEncoder::write_packet_thunk(void *opaque, uint8_t *buf, int buf_size)
 120 {
 121         VideoEncoder *video_encoder = (VideoEncoder *)opaque;
 122         return video_encoder->write_packet(buf, buf_size);
 123 }
 124
 125 int VideoEncoder::write_packet(uint8_t *buf, int buf_size)
 126 {
 127         if (stream_mux_writing_header) {
 128                 stream_mux_header.append((char *)buf, buf_size);
 129         } else {
 130                 httpd->add_data((char *)buf, buf_size, stream_mux_writing_keyframes);
 131                 stream_mux_writing_keyframes = false;
 132         }
 133         return buf_size;
 134 }
 135