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/avfiltergraph.h>\r
  26         #include <libavfilter/vsink_buffer.h>\r
  27         #include <libavfilter/vsrc_buffer.h>\r
  28 }\r
  29 \r
  30 namespace caspar {\r
  31         \r
  32 struct filter::implementation\r
  33 {\r
  34         std::string                                             filters_;\r
  35         std::shared_ptr<AVFilterGraph>  graph_; \r
  36         AVFilterContext*                                buffersink_ctx_;\r
  37         AVFilterContext*                                buffersrc_ctx_;\r
  38         \r
  39         implementation(const std::wstring& filters) \r
  40                 : filters_(narrow(filters))\r
  41         {\r
  42                 std::transform(filters_.begin(), filters_.end(), filters_.begin(), ::tolower);\r
  43         }\r
  44 \r
  45         void push(const safe_ptr<AVFrame>& frame)\r
  46         {               \r
  47                 int errn = 0;   \r
  48 \r
  49                 if(!graph_)\r
  50                 {\r
  51                         graph_.reset(avfilter_graph_alloc(), [](AVFilterGraph* p){avfilter_graph_free(&p);});\r
  52                                                                 \r
  53                         // Input\r
  54                         std::stringstream args;\r
  55                         args << frame->width << ":" << frame->height << ":" << frame->format << ":" << 0 << ":" << 0 << ":" << 0 << ":" << 0; // don't care about pts and aspect_ratio\r
  56                         errn = avfilter_graph_create_filter(&buffersrc_ctx_, avfilter_get_by_name("buffer"), "src", args.str().c_str(), NULL, graph_.get());\r
  57                         if(errn < 0)\r
  58                         {\r
  59                                 BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) <<\r
  60                                         boost::errinfo_api_function("avfilter_graph_create_filter") <<  boost::errinfo_errno(AVUNERROR(errn)));\r
  61                         }\r
  62 \r
  63                         PixelFormat pix_fmts[] = { PIX_FMT_BGRA, PIX_FMT_NONE };\r
  64 \r
  65                         // Output\r
  66                         errn = avfilter_graph_create_filter(&buffersink_ctx_, avfilter_get_by_name("buffersink"), "out", NULL, pix_fmts, graph_.get());\r
  67                         if(errn < 0)\r
  68                         {\r
  69                                 BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) <<\r
  70                                         boost::errinfo_api_function("avfilter_graph_create_filter") << boost::errinfo_errno(AVUNERROR(errn)));\r
  71                         }\r
  72                         \r
  73                         AVFilterInOut* outputs = avfilter_inout_alloc();\r
  74                         AVFilterInOut* inputs  = avfilter_inout_alloc();\r
  75 \r
  76                         outputs->name                   = av_strdup("in");\r
  77                         outputs->filter_ctx             = buffersrc_ctx_;\r
  78                         outputs->pad_idx                = 0;\r
  79                         outputs->next                   = NULL;\r
  80 \r
  81                         inputs->name                    = av_strdup("out");\r
  82                         inputs->filter_ctx              = buffersink_ctx_;\r
  83                         inputs->pad_idx                 = 0;\r
  84                         inputs->next                    = NULL;\r
  85                         \r
  86                         errn = avfilter_graph_parse(graph_.get(), filters_.c_str(), &inputs, &outputs, NULL);\r
  87                         if(errn < 0)\r
  88                         {\r
  89                                 BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) <<\r
  90                                         boost::errinfo_api_function("avfilter_graph_parse") << boost::errinfo_errno(AVUNERROR(errn)));\r
  91                         }\r
  92                         \r
  93                         errn = avfilter_graph_config(graph_.get(), NULL);\r
  94                         if(errn < 0)\r
  95                         {\r
  96                                 BOOST_THROW_EXCEPTION(caspar_exception() <<     msg_info(av_error_str(errn)) \r
  97                                         <<      boost::errinfo_api_function("avfilter_graph_config") << boost::errinfo_errno(AVUNERROR(errn)));\r
  98                         }\r
  99                 }\r
 100         \r
 101                 errn = av_vsrc_buffer_add_frame(buffersrc_ctx_, frame.get(), 0);\r
 102                 if(errn < 0)\r
 103                 {\r
 104                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info(av_error_str(errn)) <<\r
 105                                 boost::errinfo_api_function("av_vsrc_buffer_add_frame") << boost::errinfo_errno(AVUNERROR(errn)));\r
 106                 }\r
 107         }\r
 108 \r
 109         std::vector<safe_ptr<AVFrame>> poll()\r
 110         {\r
 111                 std::vector<safe_ptr<AVFrame>> result;\r
 112 \r
 113                 if(!graph_)\r
 114                         return result;\r
 115                 \r
 116                 while (avfilter_poll_frame(buffersink_ctx_->inputs[0])) \r
 117                 {\r
 118                         AVFilterBufferRef *picref;\r
 119             av_vsink_buffer_get_video_buffer_ref(buffersink_ctx_, &picref, 0);\r
 120             if (picref) \r
 121                         {               \r
 122                                 safe_ptr<AVFrame> frame(avcodec_alloc_frame(), [=](AVFrame* p)\r
 123                                 {\r
 124                                         av_free(p);\r
 125                                    avfilter_unref_buffer(picref);\r
 126                                 });\r
 127 \r
 128                                 avcodec_get_frame_defaults(frame.get());        \r
 129 \r
 130                                 for(size_t n = 0; n < 4; ++n)\r
 131                                 {\r
 132                                         frame->data[n]          = picref->data[n];\r
 133                                         frame->linesize[n]      = picref->linesize[n];\r
 134                                 }\r
 135                                 \r
 136                                 frame->format                   = picref->format;\r
 137                                 frame->width                    = picref->video->w;\r
 138                                 frame->height                   = picref->video->h;\r
 139                                 frame->interlaced_frame = picref->video->interlaced;\r
 140                                 frame->top_field_first  = picref->video->top_field_first;\r
 141                                 frame->key_frame                = picref->video->key_frame;\r
 142 \r
 143                                 result.push_back(frame);\r
 144             }\r
 145         }\r
 146 \r
 147                 return result;\r
 148         }\r
 149 };\r
 150 \r
 151 filter::filter(const std::wstring& filters) : impl_(new implementation(filters)){}\r
 152 void filter::push(const safe_ptr<AVFrame>& frame) {impl_->push(frame);}\r
 153 std::vector<safe_ptr<AVFrame>> filter::poll() {return impl_->poll();}\r
 154 }