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/avfilter.h>
  52         #include <libavfilter/buffersink.h>
  53         #include <libavfilter/buffersrc.h>
  54 }
  55 #if defined(_MSC_VER)
  56 #pragma warning (pop)
  57 #endif
  58
  59 namespace caspar { namespace ffmpeg {
  60
  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         implementation(
  70                         int in_width,
  71                         int in_height,
  72                         boost::rational<int> in_time_base,
  73                         boost::rational<int> in_frame_rate,
  74                         boost::rational<int> in_sample_aspect_ratio,
  75                         AVPixelFormat in_pix_fmt,
  76                         std::vector<AVPixelFormat> out_pix_fmts,
  77                         const std::string& filtergraph)
  78                 : filtergraph_(boost::to_lower_copy(filtergraph))
  79         {
  80                 if(out_pix_fmts.empty())
  81                 {
  82                         out_pix_fmts = {
  83                                 AV_PIX_FMT_YUVA420P,
  84                                 AV_PIX_FMT_YUV444P,
  85                                 AV_PIX_FMT_YUV422P,
  86                                 AV_PIX_FMT_YUV420P,
  87                                 AV_PIX_FMT_YUV411P,
  88                                 AV_PIX_FMT_BGRA,
  89                                 AV_PIX_FMT_ARGB,
  90                                 AV_PIX_FMT_RGBA,
  91                                 AV_PIX_FMT_ABGR,
  92                                 AV_PIX_FMT_GRAY8
  93                         };
  94                 }
  95
  96                 out_pix_fmts.push_back(AV_PIX_FMT_NONE);
  97
  98                 video_graph_.reset(
  99                         avfilter_graph_alloc(),
 100                         [](AVFilterGraph* p)
 101                         {
 102                                 avfilter_graph_free(&p);
 103                         });
 104
 105                 video_graph_->nb_threads  = boost::thread::hardware_concurrency();
 106                 video_graph_->thread_type = AVFILTER_THREAD_SLICE;
 107
 108                 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%")
 109                         % in_width % in_height
 110                         % in_pix_fmt
 111                         % in_time_base.numerator() % in_time_base.denominator()
 112                         % in_sample_aspect_ratio.numerator() % in_sample_aspect_ratio.denominator()
 113                         % in_frame_rate.numerator() % in_frame_rate.denominator()).str();
 114
 115                 AVFilterContext* filt_vsrc = nullptr;
 116                 FF(avfilter_graph_create_filter(
 117                         &filt_vsrc,
 118                         avfilter_get_by_name("buffer"),
 119                         "filter_buffer",
 120                         vsrc_options.c_str(),
 121                         nullptr,
 122                         video_graph_.get()));
 123
 124                 AVFilterContext* filt_vsink = nullptr;
 125                 FF(avfilter_graph_create_filter(
 126                         &filt_vsink,
 127                         avfilter_get_by_name("buffersink"),
 128                         "filter_buffersink",
 129                         nullptr,
 130                         nullptr,
 131                         video_graph_.get()));
 132
 133 #pragma warning (push)
 134 #pragma warning (disable : 4245)
 135
 136                 FF(av_opt_set_int_list(
 137                         filt_vsink,
 138                         "pix_fmts",
 139                         out_pix_fmts.data(),
 140                         -1,
 141                         AV_OPT_SEARCH_CHILDREN));
 142
 143 #pragma warning (pop)
 144
 145                 configure_filtergraph(
 146                         *video_graph_,
 147                         filtergraph_,
 148                         *filt_vsrc,
 149                         *filt_vsink);
 150
 151                 video_graph_in_  = filt_vsrc;
 152                 video_graph_out_ = filt_vsink;
 153
 154                 CASPAR_LOG(info)
 155                         <<      u16(std::string("\n")
 156                                 + avfilter_graph_dump(
 157                                                 video_graph_.get(),
 158                                                 nullptr));
 159         }
 160
 161         void configure_filtergraph(
 162                 AVFilterGraph& graph,
 163                 const std::string& filtergraph,
 164                 AVFilterContext& source_ctx,
 165                 AVFilterContext& sink_ctx)
 166         {
 167                 AVFilterInOut* outputs = nullptr;
 168                 AVFilterInOut* inputs = nullptr;
 169
 170                 try
 171                 {
 172                         if(!filtergraph.empty())
 173                         {
 174                                 outputs = avfilter_inout_alloc();
 175                                 inputs  = avfilter_inout_alloc();
 176
 177                                 CASPAR_VERIFY(outputs && inputs);
 178
 179                                 outputs->name       = av_strdup("in");
 180                                 outputs->filter_ctx = &source_ctx;
 181                                 outputs->pad_idx    = 0;
 182                                 outputs->next       = nullptr;
 183
 184                                 inputs->name        = av_strdup("out");
 185                                 inputs->filter_ctx  = &sink_ctx;
 186                                 inputs->pad_idx     = 0;
 187                                 inputs->next        = nullptr;
 188
 189                                 FF(avfilter_graph_parse(
 190                                         &graph,
 191                                         filtergraph.c_str(),
 192                                         &inputs,
 193                                         &outputs,
 194                                         nullptr));
 195                         }
 196                         else
 197                         {
 198                                 FF(avfilter_link(
 199                                         &source_ctx,
 200                                         0,
 201                                         &sink_ctx,
 202                                         0));
 203                         }
 204
 205                         FF(avfilter_graph_config(
 206                                 &graph,
 207                                 nullptr));
 208                 }
 209                 catch(...)
 210                 {
 211                         avfilter_inout_free(&outputs);
 212                         avfilter_inout_free(&inputs);
 213                         throw;
 214                 }
 215         }
 216
 217         void push(const std::shared_ptr<AVFrame>& src_av_frame)
 218         {
 219                 FF(av_buffersrc_add_frame(
 220                         video_graph_in_,
 221                         src_av_frame.get()));
 222         }
 223
 224         std::shared_ptr<AVFrame> poll()
 225         {
 226                 std::shared_ptr<AVFrame> filt_frame(
 227                         av_frame_alloc(),
 228                         [](AVFrame* p)
 229                         {
 230                                 av_frame_free(&p);
 231                         });
 232
 233                 const auto ret = av_buffersink_get_frame(
 234                         video_graph_out_,
 235                         filt_frame.get());
 236
 237                 if(ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
 238                         return nullptr;
 239
 240                 FF_RET(ret, "poll");
 241
 242                 return filt_frame;
 243         }
 244 };
 245
 246 filter::filter(
 247                 int in_width,
 248                 int in_height,
 249                 boost::rational<int> in_time_base,
 250                 boost::rational<int> in_frame_rate,
 251                 boost::rational<int> in_sample_aspect_ratio,
 252                 AVPixelFormat in_pix_fmt,
 253                 std::vector<AVPixelFormat> out_pix_fmts,
 254                 const std::string& filtergraph)
 255                 : impl_(new implementation(
 256                         in_width,
 257                         in_height,
 258                         in_time_base,
 259                         in_frame_rate,
 260                         in_sample_aspect_ratio,
 261                         in_pix_fmt,
 262                         out_pix_fmts,
 263                         filtergraph)){}
 264 filter::filter(filter&& other) : impl_(std::move(other.impl_)){}
 265 filter& filter::operator=(filter&& other){impl_ = std::move(other.impl_); return *this;}
 266 void filter::push(const std::shared_ptr<AVFrame>& frame){impl_->push(frame);}
 267 std::shared_ptr<AVFrame> filter::poll(){return impl_->poll();}
 268 std::wstring filter::filter_str() const{return u16(impl_->filtergraph_);}
 269 std::vector<spl::shared_ptr<AVFrame>> filter::poll_all()
 270 {
 271         std::vector<spl::shared_ptr<AVFrame>> frames;
 272         for(auto frame = poll(); frame; frame = poll())
 273                 frames.push_back(spl::make_shared_ptr(frame));
 274         return frames;
 275 }
 276
 277 }}