2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
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4 * This ffmpeg is part of CasparCG.
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6 * CasparCG is free software: you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation, either version 3 of the License, or
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9 * (at your option) any later version.
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11 * CasparCG is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
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21 #include "../StdAfx.h"
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23 #include "ffmpeg_consumer.h"
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25 #include <mixer/frame/read_frame.h>
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27 #include <common/concurrency/executor.h>
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28 #include <common/utility/string.h>
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29 #include <common/env.h>
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31 #include <boost/thread/once.hpp>
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33 #include <tbb/cache_aligned_allocator.h>
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34 #include <tbb/parallel_invoke.h>
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38 #if defined(_MSC_VER)
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39 #pragma warning (push)
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40 #pragma warning (disable : 4244)
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44 #define __STDC_CONSTANT_MACROS
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45 #define __STDC_LIMIT_MACROS
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46 #include <libavformat/avformat.h>
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47 #include <libswscale/swscale.h>
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49 #if defined(_MSC_VER)
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50 #pragma warning (pop)
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55 struct ffmpeg_consumer::implementation : boost::noncopyable
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57 printer parent_printer_;
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58 std::string filename_;
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61 AVStream* audio_st_;
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62 std::vector<unsigned char, tbb::cache_aligned_allocator<unsigned char>> audio_outbuf_;
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65 AVStream* video_st_;
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66 std::vector<uint8_t, tbb::cache_aligned_allocator<unsigned char>> picture_buf_;
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68 std::vector<unsigned char, tbb::cache_aligned_allocator<unsigned char>> video_outbuf_;
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69 SwsContext* img_convert_ctx_;
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71 AVOutputFormat* fmt_;
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72 std::shared_ptr<AVFormatContext> oc_;
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73 core::video_format_desc format_desc_;
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75 std::vector<short, tbb::cache_aligned_allocator<short>> audio_input_buffer_;
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77 boost::unique_future<void> active_;
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81 implementation(const std::string& filename)
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82 : filename_(filename)
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83 , audio_st_(nullptr)
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84 , video_st_(nullptr)
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86 , img_convert_ctx_(nullptr)
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87 , video_outbuf_(1920*1080*4)
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88 , audio_outbuf_(48000)
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93 executor_.invoke([]{});
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96 av_write_trailer(oc_.get());
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98 // Close each codec.
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100 avcodec_close(video_st_->codec);
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103 avcodec_close(audio_st_->codec);
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105 // Free the streams.
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106 for(size_t i = 0; i < oc_->nb_streams; ++i)
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108 av_freep(&oc_->streams[i]->codec);
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109 av_freep(&oc_->streams[i]);
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112 if (!(fmt_->flags & AVFMT_NOFILE))
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113 url_fclose(oc_->pb); // Close the output ffmpeg.
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116 void initialize(const core::video_format_desc& format_desc, const printer& parent_printer)
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118 format_desc_ = format_desc;
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119 parent_printer_ = parent_printer;
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121 active_ = executor_.begin_invoke([]{});
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123 fmt_ = av_guess_format(nullptr, filename_.c_str(), nullptr);
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126 CASPAR_LOG(warning) << "Could not deduce output format from ffmpeg extension: using MPEG.";
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127 fmt_ = av_guess_format("mpeg", nullptr, nullptr);
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128 filename_ = filename_ + ".avi";
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131 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Could not find suitable output format"));
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133 oc_.reset(avformat_alloc_context(), av_free);
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135 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Memory error"));
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136 std::copy_n(filename_.c_str(), filename_.size(), oc_->filename);
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138 oc_->oformat = fmt_;
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139 // To avoid mpeg buffer underflow (http://www.mail-archive.com/libav-user@mplayerhq.hu/msg00194.html)
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140 oc_->preload = static_cast<int>(0.5*AV_TIME_BASE);
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141 oc_->max_delay = static_cast<int>(0.7*AV_TIME_BASE);
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143 // Add the audio and video streams using the default format codecs and initialize the codecs .
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144 if (fmt_->video_codec != CODEC_ID_NONE)
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145 video_st_ = add_video_stream(fmt_->video_codec);
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147 if (fmt_->audio_codec != CODEC_ID_NONE)
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148 audio_st_ = add_audio_stream(fmt_->audio_codec);
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150 // Set the output parameters (must be done even if no parameters).
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152 if ((errn = -av_set_parameters(oc_.get(), nullptr)) > 0)
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153 BOOST_THROW_EXCEPTION(
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154 file_read_error() <<
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155 msg_info("Invalid output format parameters") <<
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156 boost::errinfo_api_function("avcodec_open") <<
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157 boost::errinfo_errno(errn) <<
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158 boost::errinfo_file_name(filename_));
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160 dump_format(oc_.get(), 0, filename_.c_str(), 1);
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162 // Now that all the parameters are set, we can open the audio and
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163 // video codecs and allocate the necessary encode buffers.
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165 open_video(video_st_);
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170 open_audio(audio_st_);
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174 CASPAR_LOG_CURRENT_EXCEPTION();
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175 audio_st_ = nullptr;
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178 // Open the output ffmpeg, if needed.
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179 if (!(fmt_->flags & AVFMT_NOFILE))
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182 if ((errn = -url_fopen(&oc_->pb, filename_.c_str(), URL_WRONLY)) > 0)
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183 BOOST_THROW_EXCEPTION(
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184 file_not_found() <<
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185 msg_info("Could not open file") <<
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186 boost::errinfo_api_function("url_fopen") <<
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187 boost::errinfo_errno(errn) <<
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188 boost::errinfo_file_name(filename_));
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191 av_write_header(oc_.get()); // write the stream header, if any
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193 CASPAR_LOG(info) << print() << L" Successfully initialized.";
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196 std::wstring print() const
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198 return (parent_printer_ ? parent_printer_() + L"/" : L"") + L"ffmpeg[" + widen(filename_) + L"]";
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201 AVStream* add_video_stream(enum CodecID codec_id)
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203 auto st = av_new_stream(oc_.get(), 0);
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205 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Could not alloc stream"));
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207 auto c = st->codec;
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208 c->codec_id = codec_id;
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209 c->codec_type = AVMEDIA_TYPE_VIDEO;
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211 // Put sample parameters.
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212 c->bit_rate = static_cast<int>(static_cast<double>(format_desc_.size)*format_desc_.fps*0.1326);
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213 c->width = format_desc_.width;
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214 c->height = format_desc_.height;
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215 c->time_base.den = static_cast<int>(format_desc_.fps);
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216 c->time_base.num = 1;
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217 c->pix_fmt = c->pix_fmt == -1 ? PIX_FMT_YUV420P : c->pix_fmt;
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219 // Some formats want stream headers to be separate.
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220 if(oc_->oformat->flags & AVFMT_GLOBALHEADER)
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221 c->flags |= CODEC_FLAG_GLOBAL_HEADER;
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226 void open_video(AVStream* st)
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228 auto c = st->codec;
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230 auto codec = avcodec_find_encoder(c->codec_id);
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232 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("codec not found"));
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235 if ((errn = -avcodec_open(c, codec)) > 0)
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236 BOOST_THROW_EXCEPTION(
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237 file_read_error() <<
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238 msg_info("Could not open video codec.") <<
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239 boost::errinfo_api_function("avcodec_open") <<
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240 boost::errinfo_errno(errn) <<
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241 boost::errinfo_file_name(filename_));
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244 void encode_video_frame(const safe_ptr<const core::read_frame>& frame)
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246 AVCodecContext* c = video_st_->codec;
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248 if (img_convert_ctx_ == nullptr)
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250 img_convert_ctx_ = sws_getContext(format_desc_.width, format_desc_.height, PIX_FMT_BGRA, c->width, c->height, c->pix_fmt, SWS_BICUBIC, nullptr, nullptr, nullptr);
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251 if (img_convert_ctx_ == nullptr)
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252 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Cannot initialize the conversion context"));
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255 std::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);
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256 avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), const_cast<uint8_t*>(frame->image_data().begin()), PIX_FMT_BGRA, format_desc_.width, format_desc_.height);
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258 std::shared_ptr<AVFrame> local_av_frame(avcodec_alloc_frame(), av_free);
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259 picture_buf_.resize(avpicture_get_size(c->pix_fmt, format_desc_.width, format_desc_.height));
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260 avpicture_fill(reinterpret_cast<AVPicture*>(local_av_frame.get()), picture_buf_.data(), c->pix_fmt, format_desc_.width, format_desc_.height);
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262 sws_scale(img_convert_ctx_, av_frame->data, av_frame->linesize, 0, c->height, local_av_frame->data, local_av_frame->linesize);
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264 int ret = avcodec_encode_video(c, video_outbuf_.data(), video_outbuf_.size(), local_av_frame.get());
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268 BOOST_THROW_EXCEPTION(
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269 invalid_operation() <<
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270 msg_info("Could not encode video frame.") <<
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271 boost::errinfo_api_function("avcodec_encode_video") <<
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272 boost::errinfo_errno(errn) <<
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273 boost::errinfo_file_name(filename_));
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275 auto out_size = ret;
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277 av_init_packet(&pkt);
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278 pkt.size = out_size;
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280 // If zero size, it means the image was buffered.
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283 if (c->coded_frame->pts != AV_NOPTS_VALUE)
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284 pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, video_st_->time_base);
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285 if(c->coded_frame->key_frame)
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286 pkt.flags |= AV_PKT_FLAG_KEY;
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288 pkt.stream_index = video_st_->index;
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289 pkt.data = video_outbuf_.data();
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291 if (av_interleaved_write_frame(oc_.get(), &pkt) != 0)
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292 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Error while writing video frame"));
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296 AVStream* add_audio_stream(enum CodecID codec_id)
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298 audio_st_ = av_new_stream(oc_.get(), 1);
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300 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Could not alloc stream"));
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302 auto c = audio_st_->codec;
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303 c->codec_id = codec_id;
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304 c->codec_type = AVMEDIA_TYPE_AUDIO;
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306 // Put sample parameters.
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307 c->bit_rate = 192000;
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308 c->sample_rate = 48000;
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311 // Some formats want stream headers to be separate.
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312 if(oc_->oformat->flags & AVFMT_GLOBALHEADER)
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313 c->flags |= CODEC_FLAG_GLOBAL_HEADER;
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318 void open_audio(AVStream* st)
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320 auto c = st->codec;
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322 // Find the audio encoder.
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323 auto codec = avcodec_find_encoder(c->codec_id);
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325 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("codec not found"));
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329 if ((errn = -avcodec_open(c, codec)) > 0)
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330 BOOST_THROW_EXCEPTION(
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331 file_read_error() <<
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332 msg_info("Could not open audio codec") <<
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333 boost::errinfo_api_function("avcodec_open") <<
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334 boost::errinfo_errno(errn) <<
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335 boost::errinfo_file_name(filename_));
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338 void encode_audio_frame(const safe_ptr<const core::read_frame>& frame)
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340 if(!frame->audio_data().empty())
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341 audio_input_buffer_.insert(audio_input_buffer_.end(), frame->audio_data().begin(), frame->audio_data().end());
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343 audio_input_buffer_.insert(audio_input_buffer_.end(), 3840, 0);
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345 while(encode_audio_packet()){}
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348 bool encode_audio_packet()
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350 auto c = audio_st_->codec;
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352 auto frame_bytes = c->frame_size * 2 * 2; // samples per frame * 2 channels * 2 bytes per sample
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353 if(static_cast<int>(audio_input_buffer_.size()) < frame_bytes/2)
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357 av_init_packet(&pkt);
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359 int ret = avcodec_encode_audio(c, audio_outbuf_.data(), audio_outbuf_.size(), audio_input_buffer_.data());
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363 BOOST_THROW_EXCEPTION(
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364 invalid_operation() <<
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365 msg_info("Could not encode audio samples.") <<
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366 boost::errinfo_api_function("avcodec_encode_audio") <<
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367 boost::errinfo_errno(errn) <<
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368 boost::errinfo_file_name(filename_));
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371 audio_input_buffer_ = std::vector<short, tbb::cache_aligned_allocator<short>>(audio_input_buffer_.begin() + frame_bytes/2, audio_input_buffer_.end());
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373 if (c->coded_frame && c->coded_frame->pts != AV_NOPTS_VALUE)
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374 pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, audio_st_->time_base);
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375 pkt.flags |= AV_PKT_FLAG_KEY;
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376 pkt.stream_index = audio_st_->index;
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377 pkt.data = audio_outbuf_.data();
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379 if (av_interleaved_write_frame(oc_.get(), &pkt) != 0)
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380 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Error while writing audio frame"));
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385 void send(const safe_ptr<const core::read_frame>& frame)
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388 active_ = executor_.begin_invoke([=]
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390 auto my_frame = frame;
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391 encode_video_frame(my_frame);
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392 encode_audio_frame(my_frame);
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396 size_t buffer_depth() const { return 1; }
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399 ffmpeg_consumer::ffmpeg_consumer(const std::wstring& filename) : impl_(new implementation(narrow(filename))){}
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400 ffmpeg_consumer::ffmpeg_consumer(ffmpeg_consumer&& other) : impl_(std::move(other.impl_)){}
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401 void ffmpeg_consumer::send(const safe_ptr<const core::read_frame>& frame){impl_->send(frame);}
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402 size_t ffmpeg_consumer::buffer_depth() const{return impl_->buffer_depth();}
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403 void ffmpeg_consumer::initialize(const core::video_format_desc& format_desc, const printer& parent_printer) {impl_->initialize(format_desc, parent_printer);}
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404 std::wstring ffmpeg_consumer::print() const {return impl_->print();}
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406 safe_ptr<core::frame_consumer> create_ffmpeg_consumer(const std::vector<std::wstring>& params)
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408 if(params.size() < 2 || params[0] != L"FILE")
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409 return core::frame_consumer::empty();
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411 // TODO: Ask stakeholders about case where file already exists.
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412 boost::filesystem::remove(boost::filesystem::wpath(env::media_folder() + params[1])); // Delete the file if it exists
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413 return make_safe<ffmpeg_consumer>(env::media_folder() + params[1]);
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