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/range/iterator_range.hpp>
  32 #include <boost/range/adaptors.hpp>
  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
  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/avfilter.h>
  54         #include <libavfilter/buffersink.h>
  55         #include <libavfilter/buffersrc.h>
  56 }
  57 #if defined(_MSC_VER)
  58 #pragma warning (pop)
  59 #endif
  60
  61 namespace caspar { namespace ffmpeg {
  62
  63 struct filter::implementation
  64 {
  65         std::string                                             filtergraph_;
  66
  67         std::shared_ptr<AVFilterGraph>  video_graph_;
  68     AVFilterContext*                            video_graph_in_;
  69     AVFilterContext*                            video_graph_out_;
  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                 : filtergraph_(boost::to_lower_copy(filtergraph))
  81         {
  82                 if(out_pix_fmts.empty())
  83                 {
  84                         out_pix_fmts = {
  85                                 AV_PIX_FMT_YUVA420P,
  86                                 AV_PIX_FMT_YUV444P,
  87                                 AV_PIX_FMT_YUV422P,
  88                                 AV_PIX_FMT_YUV420P,
  89                                 AV_PIX_FMT_YUV411P,
  90                                 AV_PIX_FMT_BGRA,
  91                                 AV_PIX_FMT_ARGB,
  92                                 AV_PIX_FMT_RGBA,
  93                                 AV_PIX_FMT_ABGR,
  94                                 AV_PIX_FMT_GRAY8
  95                         };
  96                 }
  97
  98                 out_pix_fmts.push_back(AV_PIX_FMT_NONE);
  99
 100                 video_graph_.reset(
 101                         avfilter_graph_alloc(),
 102                         [](AVFilterGraph* p)
 103                         {
 104                                 avfilter_graph_free(&p);
 105                         });
 106
 107                 video_graph_->nb_threads  = boost::thread::hardware_concurrency();
 108                 video_graph_->thread_type = AVFILTER_THREAD_SLICE;
 109
 110                 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%")
 111                         % in_width % in_height
 112                         % in_pix_fmt
 113                         % in_time_base.numerator() % in_time_base.denominator()
 114                         % in_sample_aspect_ratio.numerator() % in_sample_aspect_ratio.denominator()
 115                         % in_frame_rate.numerator() % in_frame_rate.denominator()).str();
 116
 117                 AVFilterContext* filt_vsrc = nullptr;
 118                 FF(avfilter_graph_create_filter(
 119                         &filt_vsrc,
 120                         avfilter_get_by_name("buffer"),
 121                         "filter_buffer",
 122                         vsrc_options.c_str(),
 123                         nullptr,
 124                         video_graph_.get()));
 125
 126                 AVFilterContext* filt_vsink = nullptr;
 127                 FF(avfilter_graph_create_filter(
 128                         &filt_vsink,
 129                         avfilter_get_by_name("buffersink"),
 130                         "filter_buffersink",
 131                         nullptr,
 132                         nullptr,
 133                         video_graph_.get()));
 134
 135 #pragma warning (push)
 136 #pragma warning (disable : 4245)
 137
 138                 FF(av_opt_set_int_list(
 139                         filt_vsink,
 140                         "pix_fmts",
 141                         out_pix_fmts.data(),
 142                         -1,
 143                         AV_OPT_SEARCH_CHILDREN));
 144
 145 #pragma warning (pop)
 146
 147                 configure_filtergraph(
 148                         *video_graph_,
 149                         filtergraph_,
 150                         *filt_vsrc,
 151                         *filt_vsink);
 152
 153                 video_graph_in_  = filt_vsrc;
 154                 video_graph_out_ = filt_vsink;
 155
 156                 CASPAR_LOG(info)
 157                         <<      u16(std::string("\n")
 158                                 + avfilter_graph_dump(
 159                                                 video_graph_.get(),
 160                                                 nullptr));
 161         }
 162
 163         void configure_filtergraph(
 164                 AVFilterGraph& graph,
 165                 const std::string& filtergraph,
 166                 AVFilterContext& source_ctx,
 167                 AVFilterContext& sink_ctx)
 168         {
 169                 AVFilterInOut* outputs = nullptr;
 170                 AVFilterInOut* inputs = nullptr;
 171
 172                 try
 173                 {
 174                         if(!filtergraph.empty())
 175                         {
 176                                 outputs = avfilter_inout_alloc();
 177                                 inputs  = avfilter_inout_alloc();
 178
 179                                 CASPAR_VERIFY(outputs && inputs);
 180
 181                                 outputs->name       = av_strdup("in");
 182                                 outputs->filter_ctx = &source_ctx;
 183                                 outputs->pad_idx    = 0;
 184                                 outputs->next       = nullptr;
 185
 186                                 inputs->name        = av_strdup("out");
 187                                 inputs->filter_ctx  = &sink_ctx;
 188                                 inputs->pad_idx     = 0;
 189                                 inputs->next        = nullptr;
 190
 191                                 FF(avfilter_graph_parse(
 192                                         &graph,
 193                                         filtergraph.c_str(),
 194                                         &inputs,
 195                                         &outputs,
 196                                         nullptr));
 197                         }
 198                         else
 199                         {
 200                                 FF(avfilter_link(
 201                                         &source_ctx,
 202                                         0,
 203                                         &sink_ctx,
 204                                         0));
 205                         }
 206
 207                         FF(avfilter_graph_config(
 208                                 &graph,
 209                                 nullptr));
 210                 }
 211                 catch(...)
 212                 {
 213                         avfilter_inout_free(&outputs);
 214                         avfilter_inout_free(&inputs);
 215                         throw;
 216                 }
 217         }
 218
 219         void push(const std::shared_ptr<AVFrame>& src_av_frame)
 220         {
 221                 FF(av_buffersrc_add_frame(
 222                         video_graph_in_,
 223                         src_av_frame.get()));
 224         }
 225
 226         std::shared_ptr<AVFrame> poll()
 227         {
 228                 std::shared_ptr<AVFrame> filt_frame(
 229                         av_frame_alloc(),
 230                         [](AVFrame* p)
 231                         {
 232                                 av_frame_free(&p);
 233                         });
 234
 235                 const auto ret = av_buffersink_get_frame(
 236                         video_graph_out_,
 237                         filt_frame.get());
 238
 239                 if(ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
 240                         return nullptr;
 241
 242                 FF_RET(ret, "poll");
 243
 244                 return filt_frame;
 245         }
 246 };
 247
 248 filter::filter(
 249                 int in_width,
 250                 int in_height,
 251                 boost::rational<int> in_time_base,
 252                 boost::rational<int> in_frame_rate,
 253                 boost::rational<int> in_sample_aspect_ratio,
 254                 AVPixelFormat in_pix_fmt,
 255                 std::vector<AVPixelFormat> out_pix_fmts,
 256                 const std::string& filtergraph)
 257                 : impl_(new implementation(
 258                         in_width,
 259                         in_height,
 260                         in_time_base,
 261                         in_frame_rate,
 262                         in_sample_aspect_ratio,
 263                         in_pix_fmt,
 264                         out_pix_fmts,
 265                         filtergraph)){}
 266 filter::filter(filter&& other) : impl_(std::move(other.impl_)){}
 267 filter& filter::operator=(filter&& other){impl_ = std::move(other.impl_); return *this;}
 268 void filter::push(const std::shared_ptr<AVFrame>& frame){impl_->push(frame);}
 269 std::shared_ptr<AVFrame> filter::poll(){return impl_->poll();}
 270 std::wstring filter::filter_str() const{return u16(impl_->filtergraph_);}
 271 std::vector<spl::shared_ptr<AVFrame>> filter::poll_all()
 272 {
 273         std::vector<spl::shared_ptr<AVFrame>> frames;
 274         for(auto frame = poll(); frame; frame = poll())
 275                 frames.push_back(spl::make_shared_ptr(frame));
 276         return frames;
 277 }
 278
 279 }}