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/>.
21 #include "ffmpeg_image_proxy.h"
23 #include "exceptions.h"
24 #include "dcpomatic_socket.h"
26 #include "compose.hpp"
29 #include <dcp/raw_convert.h>
31 #include <libavcodec/avcodec.h>
32 #include <libavformat/avformat.h>
34 DCPOMATIC_DISABLE_WARNINGS
35 #include <libxml++/libxml++.h>
36 DCPOMATIC_ENABLE_WARNINGS
46 using boost::shared_ptr;
47 using boost::optional;
48 using boost::dynamic_pointer_cast;
49 using dcp::raw_convert;
50 using namespace dcpomatic;
53 FFmpegImageProxy::FFmpegImageProxy (boost::filesystem::path path)
61 FFmpegImageProxy::FFmpegImageProxy (dcp::Data data)
68 FFmpegImageProxy::FFmpegImageProxy (shared_ptr<cxml::Node>, shared_ptr<Socket> socket)
71 uint32_t const size = socket->read_uint32 ();
72 _data = dcp::Data (size);
73 socket->read (_data.data().get(), size);
77 avio_read_wrapper (void* data, uint8_t* buffer, int amount)
79 return reinterpret_cast<FFmpegImageProxy*>(data)->avio_read (buffer, amount);
83 avio_seek_wrapper (void* data, int64_t offset, int whence)
85 return reinterpret_cast<FFmpegImageProxy*>(data)->avio_seek (offset, whence);
89 FFmpegImageProxy::avio_read (uint8_t* buffer, int const amount)
91 int const to_do = min(static_cast<int64_t>(amount), static_cast<int64_t>(_data.size()) - _pos);
95 memcpy (buffer, _data.data().get() + _pos, to_do);
101 FFmpegImageProxy::avio_seek (int64_t const pos, int whence)
113 _pos = _data.size() - pos;
120 DCPOMATIC_DISABLE_WARNINGS
123 FFmpegImageProxy::image (optional<dcp::Size>) const
125 boost::mutex::scoped_lock lm (_mutex);
128 return Result (_image, 0);
131 uint8_t* avio_buffer = static_cast<uint8_t*> (wrapped_av_malloc(4096));
132 AVIOContext* avio_context = avio_alloc_context (avio_buffer, 4096, 0, const_cast<FFmpegImageProxy*>(this), avio_read_wrapper, 0, avio_seek_wrapper);
133 AVFormatContext* format_context = avformat_alloc_context ();
134 format_context->pb = avio_context;
136 AVDictionary* options = 0;
137 /* These durations are in microseconds, and represent how far into the content file
138 we will look for streams.
140 av_dict_set (&options, "analyzeduration", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
141 av_dict_set (&options, "probesize", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
143 int e = avformat_open_input (&format_context, 0, 0, &options);
144 if ((e < 0 && e == AVERROR_INVALIDDATA) || (e >= 0 && format_context->probe_score <= 25)) {
145 /* Hack to fix loading of .tga files through AVIOContexts (rather then
146 directly from the file). This code just does enough to allow the
147 probe code to take a hint from "foo.tga" and so try targa format.
149 AVInputFormat* f = av_find_input_format ("image2");
150 format_context = avformat_alloc_context ();
151 format_context->pb = avio_context;
152 format_context->iformat = f;
153 e = avformat_open_input (&format_context, "foo.tga", f, &options);
157 throw OpenFileError (_path->string(), e, OpenFileError::READ);
159 boost::throw_exception(DecodeError(String::compose(_("Could not decode image (%1)"), e)));
163 if (avformat_find_stream_info(format_context, 0) < 0) {
164 throw DecodeError (_("could not find stream information"));
167 DCPOMATIC_ASSERT (format_context->nb_streams == 1);
169 AVFrame* frame = av_frame_alloc ();
171 throw DecodeError (N_("could not allocate frame"));
174 AVCodecContext* codec_context = format_context->streams[0]->codec;
175 AVCodec* codec = avcodec_find_decoder (codec_context->codec_id);
176 DCPOMATIC_ASSERT (codec);
178 if (avcodec_open2 (codec_context, codec, 0) < 0) {
179 throw DecodeError (N_("could not open decoder"));
183 int r = av_read_frame (format_context, &packet);
185 throw DecodeError (N_("could not read frame"));
189 if (avcodec_decode_video2(codec_context, frame, &frame_finished, &packet) < 0 || !frame_finished) {
190 throw DecodeError (N_("could not decode video"));
193 _image.reset (new Image (frame));
195 av_packet_unref (&packet);
196 av_frame_free (&frame);
197 avcodec_close (codec_context);
198 avformat_close_input (&format_context);
199 av_free (avio_context->buffer);
200 av_free (avio_context);
202 return Result (_image, 0);
205 DCPOMATIC_ENABLE_WARNINGS
208 FFmpegImageProxy::add_metadata (xmlpp::Node* node) const
210 node->add_child("Type")->add_child_text (N_("FFmpeg"));
214 FFmpegImageProxy::write_to_socket (shared_ptr<Socket> socket) const
216 socket->write (_data.size());
217 socket->write (_data.data().get(), _data.size());
221 FFmpegImageProxy::same (shared_ptr<const ImageProxy> other) const
223 shared_ptr<const FFmpegImageProxy> mp = dynamic_pointer_cast<const FFmpegImageProxy> (other);
228 if (_data.size() != mp->_data.size()) {
232 return memcmp (_data.data().get(), mp->_data.data().get(), _data.size()) == 0;
236 FFmpegImageProxy::memory_used () const
238 size_t m = _data.size();
240 m += _image->memory_used();