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 #include "../util/util.h"
  29
  30 #include <common/assert.h>
  31 #include <common/except.h>
  32
  33 #include <boost/algorithm/string.hpp>
  34 #include <boost/thread.hpp>
  35 #include <boost/format.hpp>
  36 #include <boost/rational.hpp>
  37
  38 #include <cstdio>
  39 #include <sstream>
  40 #include <string>
  41 #include <queue>
  42
  43 #if defined(_MSC_VER)
  44 #pragma warning (push)
  45 #pragma warning (disable : 4244)
  46 #endif
  47 extern "C"
  48 {
  49         #include <libavutil/avutil.h>
  50         #include <libavutil/imgutils.h>
  51         #include <libavutil/opt.h>
  52         #include <libavfilter/avfilter.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 struct filter::implementation
  62 {
  63         std::string                                                             filtergraph_;
  64
  65         std::shared_ptr<AVFilterGraph>                  video_graph_;
  66     AVFilterContext*                                            video_graph_in_;
  67     AVFilterContext*                                            video_graph_out_;
  68
  69         std::queue<std::shared_ptr<AVFrame>>    fast_path_;
  70
  71         implementation(
  72                         int in_width,
  73                         int in_height,
  74                         boost::rational<int> in_time_base,
  75                         boost::rational<int> in_frame_rate,
  76                         boost::rational<int> in_sample_aspect_ratio,
  77                         AVPixelFormat in_pix_fmt,
  78                         std::vector<AVPixelFormat> out_pix_fmts,
  79                         const std::string& filtergraph,
  80                         bool multithreaded)
  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                 if (multithreaded)
 109                 {
 110                         video_graph_->nb_threads        = 0;
 111                         video_graph_->thread_type       = AVFILTER_THREAD_SLICE;
 112                 }
 113                 else
 114                 {
 115                         video_graph_->nb_threads        = 1;
 116                 }
 117
 118                 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%")
 119                         % in_width % in_height
 120                         % in_pix_fmt
 121                         % in_time_base.numerator() % in_time_base.denominator()
 122                         % in_sample_aspect_ratio.numerator() % in_sample_aspect_ratio.denominator()
 123                         % in_frame_rate.numerator() % in_frame_rate.denominator()).str();
 124
 125                 AVFilterContext* filt_vsrc = nullptr;
 126                 FF(avfilter_graph_create_filter(
 127                         &filt_vsrc,
 128                         avfilter_get_by_name("buffer"),
 129                         "filter_buffer",
 130                         vsrc_options.c_str(),
 131                         nullptr,
 132                         video_graph_.get()));
 133
 134                 AVFilterContext* filt_vsink = nullptr;
 135                 FF(avfilter_graph_create_filter(
 136                         &filt_vsink,
 137                         avfilter_get_by_name("buffersink"),
 138                         "filter_buffersink",
 139                         nullptr,
 140                         nullptr,
 141                         video_graph_.get()));
 142
 143 #pragma warning (push)
 144 #pragma warning (disable : 4245)
 145
 146                 FF(av_opt_set_int_list(
 147                         filt_vsink,
 148                         "pix_fmts",
 149                         out_pix_fmts.data(),
 150                         -1,
 151                         AV_OPT_SEARCH_CHILDREN));
 152
 153 #pragma warning (pop)
 154
 155                 configure_filtergraph(
 156                         *video_graph_,
 157                         filtergraph_,
 158                         *filt_vsrc,
 159                         *filt_vsink);
 160
 161                 video_graph_in_  = filt_vsrc;
 162                 video_graph_out_ = filt_vsink;
 163
 164                 if (is_logging_quiet_for_thread())
 165                         CASPAR_LOG(trace)
 166                                 <<      u16(std::string("\n")
 167                                         + avfilter_graph_dump(
 168                                                         video_graph_.get(),
 169                                                         nullptr));
 170                 else
 171                         CASPAR_LOG(debug)
 172                                 << u16(std::string("\n")
 173                                         + avfilter_graph_dump(
 174                                                         video_graph_.get(),
 175                                                         nullptr));
 176         }
 177
 178         void configure_filtergraph(
 179                 AVFilterGraph& graph,
 180                 const std::string& filtergraph,
 181                 AVFilterContext& source_ctx,
 182                 AVFilterContext& sink_ctx)
 183         {
 184                 if (!filtergraph.empty())
 185                 {
 186                         auto outputs = avfilter_inout_alloc();
 187                         auto inputs  = avfilter_inout_alloc();
 188
 189                         CASPAR_VERIFY(outputs && inputs);
 190
 191                         outputs->name       = av_strdup("in");
 192                         outputs->filter_ctx = &source_ctx;
 193                         outputs->pad_idx    = 0;
 194                         outputs->next       = nullptr;
 195
 196                         inputs->name        = av_strdup("out");
 197                         inputs->filter_ctx  = &sink_ctx;
 198                         inputs->pad_idx     = 0;
 199                         inputs->next        = nullptr;
 200
 201                         FF(avfilter_graph_parse(
 202                                         &graph,
 203                                         filtergraph.c_str(),
 204                                         inputs,
 205                                         outputs,
 206                                         nullptr));
 207                 }
 208                 else
 209                 {
 210                         FF(avfilter_link(
 211                                         &source_ctx,
 212                                         0,
 213                                         &sink_ctx,
 214                                         0));
 215                 }
 216
 217                 FF(avfilter_graph_config(&graph, nullptr));
 218         }
 219
 220         bool fast_path() const
 221         {
 222                 return filtergraph_.empty();
 223         }
 224
 225         void push(const std::shared_ptr<AVFrame>& src_av_frame)
 226         {
 227                 if (fast_path())
 228                         fast_path_.push(src_av_frame);
 229                 else
 230                         FF(av_buffersrc_add_frame(
 231                                 video_graph_in_,
 232                                 src_av_frame.get()));
 233         }
 234
 235         std::shared_ptr<AVFrame> poll()
 236         {
 237                 if (fast_path())
 238                 {
 239                         if (fast_path_.empty())
 240                                 return nullptr;
 241
 242                         auto result = fast_path_.front();
 243                         fast_path_.pop();
 244                         return result;
 245                 }
 246
 247                 auto filt_frame = create_frame();
 248
 249                 const auto ret = av_buffersink_get_frame(
 250                         video_graph_out_,
 251                         filt_frame.get());
 252
 253                 if(ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
 254                         return nullptr;
 255
 256                 FF_RET(ret, "poll");
 257
 258                 return filt_frame;
 259         }
 260 };
 261
 262 filter::filter(
 263                 int in_width,
 264                 int in_height,
 265                 boost::rational<int> in_time_base,
 266                 boost::rational<int> in_frame_rate,
 267                 boost::rational<int> in_sample_aspect_ratio,
 268                 AVPixelFormat in_pix_fmt,
 269                 std::vector<AVPixelFormat> out_pix_fmts,
 270                 const std::string& filtergraph,
 271                 bool multithreaded)
 272         : impl_(new implementation(
 273                         in_width,
 274                         in_height,
 275                         in_time_base,
 276                         in_frame_rate,
 277                         in_sample_aspect_ratio,
 278                         in_pix_fmt,
 279                         out_pix_fmts,
 280                         filtergraph,
 281                         multithreaded)){}
 282 filter::filter(filter&& other) : impl_(std::move(other.impl_)){}
 283 filter& filter::operator=(filter&& other){impl_ = std::move(other.impl_); return *this;}
 284 void filter::push(const std::shared_ptr<AVFrame>& frame){impl_->push(frame);}
 285 std::shared_ptr<AVFrame> filter::poll(){return impl_->poll();}
 286 std::wstring filter::filter_str() const{return u16(impl_->filtergraph_);}
 287 std::vector<spl::shared_ptr<AVFrame>> filter::poll_all()
 288 {
 289         std::vector<spl::shared_ptr<AVFrame>> frames;
 290         for(auto frame = poll(); frame; frame = poll())
 291                 frames.push_back(spl::make_shared_ptr(frame));
 292         return frames;
 293 }
 294 }}