streamtools/output-drv-x264.cpp

   1 #include <cstring>
   2 #include "output-drv.hpp"
   3 #include <cstdio>
   4 #include <stdexcept>
   5 #include <vector>
   6 #include <string>
   7 #include <sstream>
   8
   9 namespace
  10 {
  11         std::string expand_options(const std::string& opts, uint32_t rn, uint32_t rd)
  12         {
  13                 std::ostringstream ret;
  14                 if(rd)
  15                         ret << "--fps " << rn << "/" << rd << " ";
  16                 ret << expand_arguments_common(opts, "--", " ");
  17                 return ret.str();
  18         }
  19
  20         class output_driver_x264 : public output_driver
  21         {
  22         public:
  23                 output_driver_x264(const std::string& _filename, const std::string& _options)
  24                 {
  25                         filename = _filename;
  26                         options = _options;
  27                         set_video_callback<output_driver_x264>(*this, &output_driver_x264::video_callback);
  28                 }
  29
  30                 ~output_driver_x264()
  31                 {
  32                         pclose(out);
  33                 }
  34
  35                 void ready()
  36                 {
  37                         const video_settings& v = get_video_settings();
  38                         framesize = 4 * v.get_width() * v.get_height();
  39                         width = v.get_width();
  40                         height = v.get_height();
  41
  42                         std::stringstream commandline;
  43                         commandline << "x264 ";
  44                         commandline << expand_options(options, v.get_rate_num(), v.get_rate_denum());
  45                         commandline << " - -o " << filename << " " << v.get_width() << "x" << v.get_height();
  46                         std::string s = commandline.str();
  47                         out = popen(s.c_str(), "w");
  48                         if(!out) {
  49                                 std::stringstream str;
  50                                 str << "Can't run x264 (" << s << ")";
  51                                 throw std::runtime_error(str.str());
  52                         }
  53                 }
  54
  55                 void video_callback(uint64_t timestamp, const uint8_t* raw_rgbx_data)
  56                 {
  57                         I420_convert_common(raw_rgbx_data, width, height, out, true);
  58                 }
  59         private:
  60                 FILE* out;
  61                 std::string filename;
  62                 std::string options;
  63                 size_t framesize;
  64                 uint32_t width;
  65                 uint32_t height;
  66         };
  67
  68         class output_driver_x264_factory : output_driver_factory
  69         {
  70         public:
  71                 output_driver_x264_factory()
  72                         : output_driver_factory("x264")
  73                 {
  74                 }
  75
  76                 output_driver& make(const std::string& type, const std::string& name, const std::string& parameters)
  77                 {
  78                         return *new output_driver_x264(name, parameters);
  79                 }
  80         } factory;
  81 }