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

   1 /*
   2 * Copyright 2013 Sveriges Television AB http://casparcg.com/
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../../StdAfx.h"
  23
  24 #include "filter.h"
  25
  26 #include "../../ffmpeg_error.h"
  27 #include "../../ffmpeg.h"
  28
  29 #include <common/assert.h>
  30 #include <common/except.h>
  31
  32 #include <boost/algorithm/string.hpp>
  33 #include <boost/thread.hpp>
  34 #include <boost/format.hpp>
  35 #include <boost/rational.hpp>
  36
  37 #include <cstdio>
  38 #include <sstream>
  39 #include <string>
  40 #include <queue>
  41
  42 #if defined(_MSC_VER)
  43 #pragma warning (push)
  44 #pragma warning (disable : 4244)
  45 #endif
  46 extern "C"
  47 {
  48         #include <libavutil/avutil.h>
  49         #include <libavutil/imgutils.h>
  50         #include <libavutil/opt.h>
  51         #include <libavfilter/avfilter.h>
  52         #include <libavfilter/avcodec.h>
  53         #include <libavfilter/buffersink.h>
  54         #include <libavfilter/buffersrc.h>
  55 }
  56 #if defined(_MSC_VER)
  57 #pragma warning (pop)
  58 #endif
  59
  60 namespace caspar { namespace ffmpeg {
  61
  62 struct filter::implementation
  63 {
  64         std::string                                                             filtergraph_;
  65
  66         std::shared_ptr<AVFilterGraph>                  video_graph_;
  67     AVFilterContext*                                            video_graph_in_;
  68     AVFilterContext*                                            video_graph_out_;
  69
  70         std::queue<std::shared_ptr<AVFrame>>    fast_path_;
  71
  72         implementation(
  73                         int in_width,
  74                         int in_height,
  75                         boost::rational<int> in_time_base,
  76                         boost::rational<int> in_frame_rate,
  77                         boost::rational<int> in_sample_aspect_ratio,
  78                         AVPixelFormat in_pix_fmt,
  79                         std::vector<AVPixelFormat> out_pix_fmts,
  80                         const std::string& filtergraph)
  81                 : filtergraph_(boost::to_lower_copy(filtergraph))
  82         {
  83                 if(out_pix_fmts.empty())
  84                 {
  85                         out_pix_fmts = {
  86                                 AV_PIX_FMT_YUVA420P,
  87                                 AV_PIX_FMT_YUV444P,
  88                                 AV_PIX_FMT_YUV422P,
  89                                 AV_PIX_FMT_YUV420P,
  90                                 AV_PIX_FMT_YUV411P,
  91                                 AV_PIX_FMT_BGRA,
  92                                 AV_PIX_FMT_ARGB,
  93                                 AV_PIX_FMT_RGBA,
  94                                 AV_PIX_FMT_ABGR,
  95                                 AV_PIX_FMT_GRAY8
  96                         };
  97                 }
  98
  99                 out_pix_fmts.push_back(AV_PIX_FMT_NONE);
 100
 101                 video_graph_.reset(
 102                         avfilter_graph_alloc(),
 103                         [](AVFilterGraph* p)
 104                         {
 105                                 avfilter_graph_free(&p);
 106                         });
 107
 108                 video_graph_->nb_threads  = 0;
 109                 video_graph_->thread_type = AVFILTER_THREAD_SLICE;
 110
 111                 const auto vsrc_options = (boost::format("video_size=%1%x%2%:pix_fmt=%3%:time_base=%4%/%5%:pixel_aspect=%6%/%7%:frame_rate=%8%/%9%")
 112                         % in_width % in_height
 113                         % in_pix_fmt
 114                         % in_time_base.numerator() % in_time_base.denominator()
 115                         % in_sample_aspect_ratio.numerator() % in_sample_aspect_ratio.denominator()
 116                         % in_frame_rate.numerator() % in_frame_rate.denominator()).str();
 117
 118                 AVFilterContext* filt_vsrc = nullptr;
 119                 FF(avfilter_graph_create_filter(
 120                         &filt_vsrc,
 121                         avfilter_get_by_name("buffer"),
 122                         "filter_buffer",
 123                         vsrc_options.c_str(),
 124                         nullptr,
 125                         video_graph_.get()));
 126
 127                 AVFilterContext* filt_vsink = nullptr;
 128                 FF(avfilter_graph_create_filter(
 129                         &filt_vsink,
 130                         avfilter_get_by_name("buffersink"),
 131                         "filter_buffersink",
 132                         nullptr,
 133                         nullptr,
 134                         video_graph_.get()));
 135
 136 #pragma warning (push)
 137 #pragma warning (disable : 4245)
 138
 139                 FF(av_opt_set_int_list(
 140                         filt_vsink,
 141                         "pix_fmts",
 142                         out_pix_fmts.data(),
 143                         -1,
 144                         AV_OPT_SEARCH_CHILDREN));
 145
 146 #pragma warning (pop)
 147
 148                 configure_filtergraph(
 149                         *video_graph_,
 150                         filtergraph_,
 151                         *filt_vsrc,
 152                         *filt_vsink);
 153
 154                 video_graph_in_  = filt_vsrc;
 155                 video_graph_out_ = filt_vsink;
 156
 157                 if (is_logging_quiet_for_thread())
 158                         CASPAR_LOG(trace)
 159                                 <<      u16(std::string("\n")
 160                                         + avfilter_graph_dump(
 161                                                         video_graph_.get(),
 162                                                         nullptr));
 163                 else
 164                         CASPAR_LOG(debug)
 165                                 << u16(std::string("\n")
 166                                         + avfilter_graph_dump(
 167                                                         video_graph_.get(),
 168                                                         nullptr));
 169         }
 170
 171         void configure_filtergraph(
 172                 AVFilterGraph& graph,
 173                 const std::string& filtergraph,
 174                 AVFilterContext& source_ctx,
 175                 AVFilterContext& sink_ctx)
 176         {
 177                 AVFilterInOut* outputs = nullptr;
 178                 AVFilterInOut* inputs = nullptr;
 179
 180                 try
 181                 {
 182                         if(!filtergraph.empty())
 183                         {
 184                                 outputs = avfilter_inout_alloc();
 185                                 inputs  = avfilter_inout_alloc();
 186
 187                                 CASPAR_VERIFY(outputs && inputs);
 188
 189                                 outputs->name       = av_strdup("in");
 190                                 outputs->filter_ctx = &source_ctx;
 191                                 outputs->pad_idx    = 0;
 192                                 outputs->next       = nullptr;
 193
 194                                 inputs->name        = av_strdup("out");
 195                                 inputs->filter_ctx  = &sink_ctx;
 196                                 inputs->pad_idx     = 0;
 197                                 inputs->next        = nullptr;
 198
 199                                 FF(avfilter_graph_parse(
 200                                         &graph,
 201                                         filtergraph.c_str(),
 202                                         inputs,
 203                                         outputs,
 204                                         nullptr));
 205                         }
 206                         else
 207                         {
 208                                 FF(avfilter_link(
 209                                         &source_ctx,
 210                                         0,
 211                                         &sink_ctx,
 212                                         0));
 213                         }
 214
 215                         FF(avfilter_graph_config(
 216                                 &graph,
 217                                 nullptr));
 218                 }
 219                 catch(...)
 220                 {
 221                         //avfilter_inout_free(&outputs);
 222                         //avfilter_inout_free(&inputs);
 223                         throw;
 224                 }
 225         }
 226
 227         bool fast_path() const
 228         {
 229                 return filtergraph_.empty();
 230         }
 231
 232         void push(const std::shared_ptr<AVFrame>& src_av_frame)
 233         {
 234                 if (fast_path())
 235                         fast_path_.push(src_av_frame);
 236                 else
 237                         FF(av_buffersrc_add_frame(
 238                                 video_graph_in_,
 239                                 src_av_frame.get()));
 240         }
 241
 242         std::shared_ptr<AVFrame> poll()
 243         {
 244                 if (fast_path())
 245                 {
 246                         if (fast_path_.empty())
 247                                 return nullptr;
 248
 249                         auto result = fast_path_.front();
 250                         fast_path_.pop();
 251                         return result;
 252                 }
 253
 254                 std::shared_ptr<AVFrame> filt_frame(
 255                         av_frame_alloc(),
 256                         [](AVFrame* p)
 257                         {
 258                                 av_frame_free(&p);
 259                         });
 260
 261                 const auto ret = av_buffersink_get_frame(
 262                         video_graph_out_,
 263                         filt_frame.get());
 264
 265                 if(ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
 266                         return nullptr;
 267
 268                 FF_RET(ret, "poll");
 269
 270                 return filt_frame;
 271         }
 272 };
 273
 274 filter::filter(
 275                 int in_width,
 276                 int in_height,
 277                 boost::rational<int> in_time_base,
 278                 boost::rational<int> in_frame_rate,
 279                 boost::rational<int> in_sample_aspect_ratio,
 280                 AVPixelFormat in_pix_fmt,
 281                 std::vector<AVPixelFormat> out_pix_fmts,
 282                 const std::string& filtergraph)
 283                 : impl_(new implementation(
 284                         in_width,
 285                         in_height,
 286                         in_time_base,
 287                         in_frame_rate,
 288                         in_sample_aspect_ratio,
 289                         in_pix_fmt,
 290                         out_pix_fmts,
 291                         filtergraph)){}
 292 filter::filter(filter&& other) : impl_(std::move(other.impl_)){}
 293 filter& filter::operator=(filter&& other){impl_ = std::move(other.impl_); return *this;}
 294 void filter::push(const std::shared_ptr<AVFrame>& frame){impl_->push(frame);}
 295 std::shared_ptr<AVFrame> filter::poll(){return impl_->poll();}
 296 std::wstring filter::filter_str() const{return u16(impl_->filtergraph_);}
 297 std::vector<spl::shared_ptr<AVFrame>> filter::poll_all()
 298 {
 299         std::vector<spl::shared_ptr<AVFrame>> frames;
 300         for(auto frame = poll(); frame; frame = poll())
 301                 frames.push_back(spl::make_shared_ptr(frame));
 302         return frames;
 303 }
 304
 305 }}