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
  28 #include <common/assert.h>
  29 #include <common/except.h>
  30
  31 #include <boost/algorithm/string.hpp>
  32 #include <boost/thread.hpp>
  33 #include <boost/format.hpp>
  34 #include <boost/rational.hpp>
  35
  36 #include <cstdio>
  37 #include <sstream>
  38 #include <string>
  39
  40 #if defined(_MSC_VER)
  41 #pragma warning (push)
  42 #pragma warning (disable : 4244)
  43 #endif
  44 extern "C"
  45 {
  46         #include <libavutil/avutil.h>
  47         #include <libavutil/imgutils.h>
  48         #include <libavutil/opt.h>
  49         #include <libavfilter/avfilter.h>
  50         #include <libavfilter/avcodec.h>
  51         #include <libavfilter/buffersink.h>
  52         #include <libavfilter/buffersrc.h>
  53 }
  54 #if defined(_MSC_VER)
  55 #pragma warning (pop)
  56 #endif
  57
  58 namespace caspar { namespace ffmpeg {
  59
  60 struct filter::implementation
  61 {
  62         std::string                                             filtergraph_;
  63
  64         std::shared_ptr<AVFilterGraph>  video_graph_;
  65     AVFilterContext*                            video_graph_in_;
  66     AVFilterContext*                            video_graph_out_;
  67
  68         implementation(
  69                         int in_width,
  70                         int in_height,
  71                         boost::rational<int> in_time_base,
  72                         boost::rational<int> in_frame_rate,
  73                         boost::rational<int> in_sample_aspect_ratio,
  74                         AVPixelFormat in_pix_fmt,
  75                         std::vector<AVPixelFormat> out_pix_fmts,
  76                         const std::string& filtergraph)
  77                 : filtergraph_(boost::to_lower_copy(filtergraph))
  78         {
  79                 if(out_pix_fmts.empty())
  80                 {
  81                         out_pix_fmts = {
  82                                 AV_PIX_FMT_YUVA420P,
  83                                 AV_PIX_FMT_YUV444P,
  84                                 AV_PIX_FMT_YUV422P,
  85                                 AV_PIX_FMT_YUV420P,
  86                                 AV_PIX_FMT_YUV411P,
  87                                 AV_PIX_FMT_BGRA,
  88                                 AV_PIX_FMT_ARGB,
  89                                 AV_PIX_FMT_RGBA,
  90                                 AV_PIX_FMT_ABGR,
  91                                 AV_PIX_FMT_GRAY8
  92                         };
  93                 }
  94
  95                 out_pix_fmts.push_back(AV_PIX_FMT_NONE);
  96
  97                 video_graph_.reset(
  98                         avfilter_graph_alloc(),
  99                         [](AVFilterGraph* p)
 100                         {
 101                                 avfilter_graph_free(&p);
 102                         });
 103
 104                 video_graph_->nb_threads  = boost::thread::hardware_concurrency();
 105                 video_graph_->thread_type = AVFILTER_THREAD_SLICE;
 106
 107                 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%")
 108                         % in_width % in_height
 109                         % in_pix_fmt
 110                         % in_time_base.numerator() % in_time_base.denominator()
 111                         % in_sample_aspect_ratio.numerator() % in_sample_aspect_ratio.denominator()
 112                         % in_frame_rate.numerator() % in_frame_rate.denominator()).str();
 113
 114                 AVFilterContext* filt_vsrc = nullptr;
 115                 FF(avfilter_graph_create_filter(
 116                         &filt_vsrc,
 117                         avfilter_get_by_name("buffer"),
 118                         "filter_buffer",
 119                         vsrc_options.c_str(),
 120                         nullptr,
 121                         video_graph_.get()));
 122
 123                 AVFilterContext* filt_vsink = nullptr;
 124                 FF(avfilter_graph_create_filter(
 125                         &filt_vsink,
 126                         avfilter_get_by_name("buffersink"),
 127                         "filter_buffersink",
 128                         nullptr,
 129                         nullptr,
 130                         video_graph_.get()));
 131
 132 #pragma warning (push)
 133 #pragma warning (disable : 4245)
 134
 135                 FF(av_opt_set_int_list(
 136                         filt_vsink,
 137                         "pix_fmts",
 138                         out_pix_fmts.data(),
 139                         -1,
 140                         AV_OPT_SEARCH_CHILDREN));
 141
 142 #pragma warning (pop)
 143
 144                 configure_filtergraph(
 145                         *video_graph_,
 146                         filtergraph_,
 147                         *filt_vsrc,
 148                         *filt_vsink);
 149
 150                 video_graph_in_  = filt_vsrc;
 151                 video_graph_out_ = filt_vsink;
 152
 153                 CASPAR_LOG(info)
 154                         <<      u16(std::string("\n")
 155                                 + avfilter_graph_dump(
 156                                                 video_graph_.get(),
 157                                                 nullptr));
 158         }
 159
 160         void configure_filtergraph(
 161                 AVFilterGraph& graph,
 162                 const std::string& filtergraph,
 163                 AVFilterContext& source_ctx,
 164                 AVFilterContext& sink_ctx)
 165         {
 166                 AVFilterInOut* outputs = nullptr;
 167                 AVFilterInOut* inputs = nullptr;
 168
 169                 try
 170                 {
 171                         if(!filtergraph.empty())
 172                         {
 173                                 outputs = avfilter_inout_alloc();
 174                                 inputs  = avfilter_inout_alloc();
 175
 176                                 CASPAR_VERIFY(outputs && inputs);
 177
 178                                 outputs->name       = av_strdup("in");
 179                                 outputs->filter_ctx = &source_ctx;
 180                                 outputs->pad_idx    = 0;
 181                                 outputs->next       = nullptr;
 182
 183                                 inputs->name        = av_strdup("out");
 184                                 inputs->filter_ctx  = &sink_ctx;
 185                                 inputs->pad_idx     = 0;
 186                                 inputs->next        = nullptr;
 187
 188                                 FF(avfilter_graph_parse(
 189                                         &graph,
 190                                         filtergraph.c_str(),
 191                                         inputs,
 192                                         outputs,
 193                                         nullptr));
 194                         }
 195                         else
 196                         {
 197                                 FF(avfilter_link(
 198                                         &source_ctx,
 199                                         0,
 200                                         &sink_ctx,
 201                                         0));
 202                         }
 203
 204                         FF(avfilter_graph_config(
 205                                 &graph,
 206                                 nullptr));
 207                 }
 208                 catch(...)
 209                 {
 210                         //avfilter_inout_free(&outputs);
 211                         //avfilter_inout_free(&inputs);
 212                         throw;
 213                 }
 214         }
 215
 216         void push(const std::shared_ptr<AVFrame>& src_av_frame)
 217         {
 218                 FF(av_buffersrc_add_frame(
 219                         video_graph_in_,
 220                         src_av_frame.get()));
 221         }
 222
 223         std::shared_ptr<AVFrame> poll()
 224         {
 225                 std::shared_ptr<AVFrame> filt_frame(
 226                         av_frame_alloc(),
 227                         [](AVFrame* p)
 228                         {
 229                                 av_frame_free(&p);
 230                         });
 231
 232                 const auto ret = av_buffersink_get_frame(
 233                         video_graph_out_,
 234                         filt_frame.get());
 235
 236                 if(ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
 237                         return nullptr;
 238
 239                 FF_RET(ret, "poll");
 240
 241                 return filt_frame;
 242         }
 243 };
 244
 245 filter::filter(
 246                 int in_width,
 247                 int in_height,
 248                 boost::rational<int> in_time_base,
 249                 boost::rational<int> in_frame_rate,
 250                 boost::rational<int> in_sample_aspect_ratio,
 251                 AVPixelFormat in_pix_fmt,
 252                 std::vector<AVPixelFormat> out_pix_fmts,
 253                 const std::string& filtergraph)
 254                 : impl_(new implementation(
 255                         in_width,
 256                         in_height,
 257                         in_time_base,
 258                         in_frame_rate,
 259                         in_sample_aspect_ratio,
 260                         in_pix_fmt,
 261                         out_pix_fmts,
 262                         filtergraph)){}
 263 filter::filter(filter&& other) : impl_(std::move(other.impl_)){}
 264 filter& filter::operator=(filter&& other){impl_ = std::move(other.impl_); return *this;}
 265 void filter::push(const std::shared_ptr<AVFrame>& frame){impl_->push(frame);}
 266 std::shared_ptr<AVFrame> filter::poll(){return impl_->poll();}
 267 std::wstring filter::filter_str() const{return u16(impl_->filtergraph_);}
 268 std::vector<spl::shared_ptr<AVFrame>> filter::poll_all()
 269 {
 270         std::vector<spl::shared_ptr<AVFrame>> frames;
 271         for(auto frame = poll(); frame; frame = poll())
 272                 frames.push_back(spl::make_shared_ptr(frame));
 273         return frames;
 274 }
 275
 276 }}