2 Copyright (C) 2014-2018 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic 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 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic 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.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #include "compose.hpp"
24 #include "dcpomatic_socket.h"
25 #include "exceptions.h"
26 #include "ffmpeg_image_proxy.h"
30 #include <dcp/raw_convert.h>
31 DCPOMATIC_DISABLE_WARNINGS
33 #include <libavcodec/avcodec.h>
34 #include <libavformat/avformat.h>
35 #include <libavutil/pixdesc.h>
37 #include <libxml++/libxml++.h>
38 DCPOMATIC_ENABLE_WARNINGS
46 using std::make_shared;
49 using std::shared_ptr;
51 using boost::optional;
52 using std::dynamic_pointer_cast;
53 using dcp::raw_convert;
56 FFmpegImageProxy::FFmpegImageProxy (boost::filesystem::path path)
64 FFmpegImageProxy::FFmpegImageProxy (dcp::ArrayData data)
71 FFmpegImageProxy::FFmpegImageProxy (shared_ptr<Socket> socket)
74 uint32_t const size = socket->read_uint32 ();
75 _data = dcp::ArrayData (size);
76 socket->read (_data.data(), size);
80 avio_read_wrapper (void* data, uint8_t* buffer, int amount)
82 return reinterpret_cast<FFmpegImageProxy*>(data)->avio_read (buffer, amount);
86 avio_seek_wrapper (void* data, int64_t offset, int whence)
88 return reinterpret_cast<FFmpegImageProxy*>(data)->avio_seek (offset, whence);
92 FFmpegImageProxy::avio_read (uint8_t* buffer, int const amount)
94 int const to_do = min(static_cast<int64_t>(amount), static_cast<int64_t>(_data.size()) - _pos);
98 memcpy (buffer, _data.data() + _pos, to_do);
104 FFmpegImageProxy::avio_seek (int64_t const pos, int whence)
116 _pos = _data.size() - pos;
125 FFmpegImageProxy::image (Image::Alignment alignment, optional<dcp::Size>) const
127 auto constexpr name_for_errors = "FFmpegImageProxy::image";
129 boost::mutex::scoped_lock lm (_mutex);
132 return Result (_image, 0);
135 uint8_t* avio_buffer = static_cast<uint8_t*> (wrapped_av_malloc(4096));
136 auto avio_context = avio_alloc_context (avio_buffer, 4096, 0, const_cast<FFmpegImageProxy*>(this), avio_read_wrapper, 0, avio_seek_wrapper);
137 AVFormatContext* format_context = avformat_alloc_context ();
138 format_context->pb = avio_context;
140 AVDictionary* options = nullptr;
141 /* These durations are in microseconds, and represent how far into the content file
142 we will look for streams.
144 av_dict_set (&options, "analyzeduration", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
145 av_dict_set (&options, "probesize", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
147 int e = avformat_open_input (&format_context, 0, 0, &options);
148 if ((e < 0 && e == AVERROR_INVALIDDATA) || (e >= 0 && format_context->probe_score <= 25)) {
149 /* Hack to fix loading of .tga files through AVIOContexts (rather then
150 directly from the file). This code just does enough to allow the
151 probe code to take a hint from "foo.tga" and so try targa format.
153 auto f = av_find_input_format ("image2");
154 format_context = avformat_alloc_context ();
155 format_context->pb = avio_context;
156 format_context->iformat = f;
157 e = avformat_open_input (&format_context, "foo.tga", f, &options);
161 throw OpenFileError (_path->string(), e, OpenFileError::READ);
163 boost::throw_exception(DecodeError(String::compose(_("Could not decode image (%1)"), e)));
167 int r = avformat_find_stream_info(format_context, 0);
169 throw DecodeError (N_("avcodec_find_stream_info"), name_for_errors, r, *_path);
172 DCPOMATIC_ASSERT (format_context->nb_streams == 1);
174 auto frame = av_frame_alloc ();
179 auto codec = avcodec_find_decoder (format_context->streams[0]->codecpar->codec_id);
180 DCPOMATIC_ASSERT (codec);
182 auto context = avcodec_alloc_context3 (codec);
184 throw DecodeError (N_("avcodec_alloc_context3"), name_for_errors, *_path);
187 r = avcodec_open2 (context, codec, 0);
189 throw DecodeError (N_("avcodec_open2"), name_for_errors, r, *_path);
193 r = av_read_frame (format_context, &packet);
195 throw DecodeError (N_("av_read_frame"), name_for_errors, r, *_path);
198 r = avcodec_send_packet (context, &packet);
200 throw DecodeError (N_("avcodec_send_packet"), name_for_errors, r, *_path);
203 r = avcodec_receive_frame (context, frame);
205 throw DecodeError (N_("avcodec_receive_frame"), name_for_errors, r, *_path);
208 _image = make_shared<Image>(frame, alignment);
210 av_packet_unref (&packet);
211 av_frame_free (&frame);
212 avcodec_free_context (&context);
213 avformat_close_input (&format_context);
214 av_free (avio_context->buffer);
215 av_free (avio_context);
217 return Result (_image, 0);
222 FFmpegImageProxy::add_metadata (xmlpp::Node* node) const
224 node->add_child("Type")->add_child_text (N_("FFmpeg"));
228 FFmpegImageProxy::write_to_socket (shared_ptr<Socket> socket) const
230 socket->write (_data.size());
231 socket->write (_data.data(), _data.size());
235 FFmpegImageProxy::same (shared_ptr<const ImageProxy> other) const
237 auto mp = dynamic_pointer_cast<const FFmpegImageProxy>(other);
242 return _data == mp->_data;
246 FFmpegImageProxy::memory_used () const
248 size_t m = _data.size();
250 m += _image->memory_used();