git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/filter/filter.cpp

   1 #include "../../stdafx.h"\r
   2 \r
   3 #include "filter.h"\r
   4 \r
   5 #include "../../ffmpeg_error.h"\r
   6 \r
   7 #include <common/exception/exceptions.h>\r
   8 #include <core/producer/frame/basic_frame.h>\r
   9 #include <core/producer/frame/frame_factory.h>\r
  10 #include <core/mixer/write_frame.h>\r
  11 \r
  12 #include <boost/circular_buffer.hpp>\r
  13 \r
  14 #include <cstdio>\r
  15 #include <sstream>\r
  16 \r
  17 extern "C" \r
  18 {\r
  19         #define __STDC_CONSTANT_MACROS\r
  20         #define __STDC_LIMIT_MACROS\r
  21         #include <libavutil/avutil.h>\r
  22         #include <libavutil/imgutils.h>\r
  23         #include <libavfilter/avfilter.h>\r
  24         #include <libavfilter/avcodec.h>\r
  25         #include <libavfilter/vsrc_buffer.h>\r
  26         #include <libavfilter/avfiltergraph.h>\r
  27 }\r
  28 \r
  29 namespace caspar {\r
  30         \r
  31 struct filter::implementation\r
  32 {\r
  33         std::string                                                             filters_;\r
  34         std::shared_ptr<AVFilterGraph>                  graph_;\r
  35         AVFilterContext*                                                video_in_filter_;\r
  36         AVFilterContext*                                                video_out_filter_;\r
  37         size_t                                                                  delay_;\r
  38         size_t                                                                  count_;\r
  39 \r
  40         implementation(const std::string& filters) \r
  41                 : filters_(filters)\r
  42                 , delay_(0)\r
  43                 , count_(0)\r
  44         {\r
  45                 std::transform(filters_.begin(), filters_.end(), filters_.begin(), ::tolower);\r
  46         }\r
  47 \r
  48         void push(const safe_ptr<AVFrame>& frame)\r
  49         {               \r
  50                 int errn = 0;   \r
  51 \r
  52                 if(!graph_)\r
  53                 {\r
  54                         graph_.reset(avfilter_graph_alloc(), [](AVFilterGraph* p){avfilter_graph_free(&p);});\r
  55                         \r
  56                         // Input\r
  57                         std::stringstream buffer_ss;\r
  58                         buffer_ss << frame->width << ":" << frame->height << ":" << frame->format << ":" << 0 << ":" << 0 << ":" << 0 << ":" << 0; // don't care about pts and aspect_ratio\r
  59                         errn = avfilter_graph_create_filter(&video_in_filter_, avfilter_get_by_name("buffer"), "src", buffer_ss.str().c_str(), NULL, graph_.get());\r
  60                         if(errn < 0 || !video_in_filter_)\r
  61                         {\r
  62                                 BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) <<\r
  63                                         boost::errinfo_api_function("avfilter_graph_create_filter") <<  boost::errinfo_errno(AVUNERROR(errn)));\r
  64                         }\r
  65 \r
  66                         // Output\r
  67                         errn = avfilter_graph_create_filter(&video_out_filter_, avfilter_get_by_name("nullsink"), "out", NULL, NULL, graph_.get());\r
  68                         if(errn < 0 || !video_out_filter_)\r
  69                         {\r
  70                                 BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) <<\r
  71                                         boost::errinfo_api_function("avfilter_graph_create_filter") << boost::errinfo_errno(AVUNERROR(errn)));\r
  72                         }\r
  73                         \r
  74                         AVFilterInOut* outputs = reinterpret_cast<AVFilterInOut*>(av_malloc(sizeof(AVFilterInOut)));\r
  75                         AVFilterInOut* inputs  = reinterpret_cast<AVFilterInOut*>(av_malloc(sizeof(AVFilterInOut)));\r
  76 \r
  77                         outputs->name                   = av_strdup("in");\r
  78                         outputs->filter_ctx             = video_in_filter_;\r
  79                         outputs->pad_idx                = 0;\r
  80                         outputs->next                   = NULL;\r
  81 \r
  82                         inputs->name                    = av_strdup("out");\r
  83                         inputs->filter_ctx              = video_out_filter_;\r
  84                         inputs->pad_idx                 = 0;\r
  85                         inputs->next                    = NULL;\r
  86                         \r
  87                         errn = avfilter_graph_parse(graph_.get(), filters_.c_str(), inputs, outputs, NULL);\r
  88                         if(errn < 0)\r
  89                         {\r
  90                                 BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) <<\r
  91                                         boost::errinfo_api_function("avfilter_graph_parse") << boost::errinfo_errno(AVUNERROR(errn)));\r
  92                         }\r
  93 \r
  94 //                      av_free(outputs);\r
  95 //                      av_free(inputs);\r
  96 \r
  97                         errn = avfilter_graph_config(graph_.get(), NULL);\r
  98                         if(errn < 0)\r
  99                         {\r
 100                                 BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) \r
 101                                         <<      boost::errinfo_api_function("avfilter_graph_config") << boost::errinfo_errno(AVUNERROR(errn)));\r
 102                         }\r
 103                 }\r
 104         \r
 105                 errn = av_vsrc_buffer_add_frame(video_in_filter_, frame.get(), 0);\r
 106                 if(errn < 0)\r
 107                 {\r
 108                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info(av_error_str(errn)) <<\r
 109                                 boost::errinfo_api_function("av_vsrc_buffer_add_frame") << boost::errinfo_errno(AVUNERROR(errn)));\r
 110                 }\r
 111                 ++count_;\r
 112         }\r
 113 \r
 114         std::vector<safe_ptr<AVFrame>> poll()\r
 115         {\r
 116                 std::vector<safe_ptr<AVFrame>> result;\r
 117 \r
 118                 if(!graph_ || count_ == 0)\r
 119                         return result;\r
 120                 \r
 121                 --count_;\r
 122 \r
 123                 int errn = avfilter_poll_frame(video_out_filter_->inputs[0]);\r
 124                 if(errn < 0)\r
 125                 {\r
 126                         BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) <<\r
 127                                 boost::errinfo_api_function("avfilter_poll_frame") << boost::errinfo_errno(AVUNERROR(errn)));\r
 128                 }\r
 129 \r
 130                 if(errn == 0)\r
 131                         ++delay_;\r
 132                 \r
 133                 std::generate_n(std::back_inserter(result), errn, [&]{return request_frame();});\r
 134 \r
 135                 return result;\r
 136         }\r
 137                 \r
 138         safe_ptr<AVFrame> request_frame()\r
 139         {               \r
 140                 auto link = video_out_filter_->inputs[0];\r
 141                 \r
 142                 int errn = avfilter_request_frame(link);                        \r
 143                 if(errn < 0)\r
 144                 {\r
 145                         BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) <<\r
 146                                 boost::errinfo_api_function("avfilter_request_frame") << boost::errinfo_errno(AVUNERROR(errn)));\r
 147                 }\r
 148                 \r
 149                 auto cur_buf = link->cur_buf;\r
 150                 auto pic = reinterpret_cast<AVPicture*>(link->cur_buf->buf);\r
 151                 \r
 152                 safe_ptr<AVFrame> frame(avcodec_alloc_frame(), [=](AVFrame* p)\r
 153                 {\r
 154                         av_free(p);\r
 155                         avfilter_unref_buffer(cur_buf);\r
 156                 });\r
 157 \r
 158                 avcodec_get_frame_defaults(frame.get());        \r
 159 \r
 160                 for(size_t n = 0; n < 4; ++n)\r
 161                 {\r
 162                         frame->data[n]          = pic->data[n];\r
 163                         frame->linesize[n]      = pic->linesize[n];\r
 164                 }\r
 165 \r
 166                 frame->width                    = link->cur_buf->video->w;\r
 167                 frame->height                   = link->cur_buf->video->h;\r
 168                 frame->format                   = link->cur_buf->format;\r
 169                 frame->interlaced_frame = link->cur_buf->video->interlaced;\r
 170                 frame->top_field_first  = link->cur_buf->video->top_field_first;\r
 171                 frame->key_frame                = link->cur_buf->video->key_frame;\r
 172 \r
 173                 return frame;\r
 174         }\r
 175 };\r
 176 \r
 177 filter::filter(const std::string& filters) : impl_(new implementation(filters)){}\r
 178 void filter::push(const safe_ptr<AVFrame>& frame) {impl_->push(frame);}\r
 179 std::vector<safe_ptr<AVFrame>> filter::poll() {return impl_->poll();}\r
 180 size_t filter::delay() const{return impl_->delay_;}\r
 181 }