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

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