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>
32 #include <libavcodec/avcodec.h>
33 #include <libavformat/avformat.h>
34 #include <libavutil/pixdesc.h>
36 DCPOMATIC_DISABLE_WARNINGS
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, VideoRange video_range)
58 , _video_range (video_range)
65 FFmpegImageProxy::FFmpegImageProxy (dcp::ArrayData data, VideoRange video_range)
67 , _video_range (video_range)
73 FFmpegImageProxy::FFmpegImageProxy (shared_ptr<cxml::Node> node, shared_ptr<Socket> socket)
74 : _video_range (string_to_video_range(node->string_child("VideoRange")))
77 uint32_t const size = socket->read_uint32 ();
78 _data = dcp::ArrayData (size);
79 socket->read (_data.data(), size);
83 avio_read_wrapper (void* data, uint8_t* buffer, int amount)
85 return reinterpret_cast<FFmpegImageProxy*>(data)->avio_read (buffer, amount);
89 avio_seek_wrapper (void* data, int64_t offset, int whence)
91 return reinterpret_cast<FFmpegImageProxy*>(data)->avio_seek (offset, whence);
95 FFmpegImageProxy::avio_read (uint8_t* buffer, int const amount)
97 int const to_do = min(static_cast<int64_t>(amount), static_cast<int64_t>(_data.size()) - _pos);
101 memcpy (buffer, _data.data() + _pos, to_do);
107 FFmpegImageProxy::avio_seek (int64_t const pos, int whence)
119 _pos = _data.size() - pos;
128 FFmpegImageProxy::image (optional<dcp::Size>) const
130 auto constexpr name_for_errors = "FFmpegImageProxy::image";
132 boost::mutex::scoped_lock lm (_mutex);
135 return Result (_image, 0);
138 uint8_t* avio_buffer = static_cast<uint8_t*> (wrapped_av_malloc(4096));
139 AVIOContext* avio_context = avio_alloc_context (avio_buffer, 4096, 0, const_cast<FFmpegImageProxy*>(this), avio_read_wrapper, 0, avio_seek_wrapper);
140 AVFormatContext* format_context = avformat_alloc_context ();
141 format_context->pb = avio_context;
143 AVDictionary* options = 0;
144 /* These durations are in microseconds, and represent how far into the content file
145 we will look for streams.
147 av_dict_set (&options, "analyzeduration", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
148 av_dict_set (&options, "probesize", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
150 int e = avformat_open_input (&format_context, 0, 0, &options);
151 if ((e < 0 && e == AVERROR_INVALIDDATA) || (e >= 0 && format_context->probe_score <= 25)) {
152 /* Hack to fix loading of .tga files through AVIOContexts (rather then
153 directly from the file). This code just does enough to allow the
154 probe code to take a hint from "foo.tga" and so try targa format.
156 AVInputFormat* f = av_find_input_format ("image2");
157 format_context = avformat_alloc_context ();
158 format_context->pb = avio_context;
159 format_context->iformat = f;
160 e = avformat_open_input (&format_context, "foo.tga", f, &options);
164 throw OpenFileError (_path->string(), e, OpenFileError::READ);
166 boost::throw_exception(DecodeError(String::compose(_("Could not decode image (%1)"), e)));
170 int r = avformat_find_stream_info(format_context, 0);
172 throw DecodeError (N_("avcodec_find_stream_info"), name_for_errors, r);
175 DCPOMATIC_ASSERT (format_context->nb_streams == 1);
177 AVFrame* frame = av_frame_alloc ();
182 auto codec = avcodec_find_decoder (format_context->streams[0]->codecpar->codec_id);
183 DCPOMATIC_ASSERT (codec);
185 auto context = avcodec_alloc_context3 (codec);
187 throw DecodeError (N_("avcodec_alloc_context3"), name_for_errors);
190 r = avcodec_open2 (context, codec, 0);
192 throw DecodeError (N_("avcodec_open2"), name_for_errors, r);
196 r = av_read_frame (format_context, &packet);
198 throw DecodeError (N_("av_read_frame"), name_for_errors, r);
201 r = avcodec_send_packet (context, &packet);
203 throw DecodeError (N_("avcodec_send_packet"), name_for_errors, r);
206 r = avcodec_receive_frame (context, frame);
208 throw DecodeError (N_("avcodec_receive_frame"), name_for_errors, r);
211 auto const pix_fmt = static_cast<AVPixelFormat>(frame->format);
213 _image = make_shared<Image>(frame);
214 if (_video_range == VideoRange::VIDEO && av_pix_fmt_desc_get(pix_fmt)->flags & AV_PIX_FMT_FLAG_RGB) {
215 /* Asking for the video range to be converted by libswscale (in Image) will not work for
216 * RGB sources since that method only processes video range in YUV and greyscale. So we have
217 * to do it ourselves here.
219 _image->video_range_to_full_range();
222 av_packet_unref (&packet);
223 av_frame_free (&frame);
224 avcodec_free_context (&context);
225 avformat_close_input (&format_context);
226 av_free (avio_context->buffer);
227 av_free (avio_context);
229 return Result (_image, 0);
234 FFmpegImageProxy::add_metadata (xmlpp::Node* node) const
236 node->add_child("Type")->add_child_text (N_("FFmpeg"));
237 node->add_child("VideoRange")->add_child_text(video_range_to_string(_video_range));
241 FFmpegImageProxy::write_to_socket (shared_ptr<Socket> socket) const
243 socket->write (_data.size());
244 socket->write (_data.data(), _data.size());
248 FFmpegImageProxy::same (shared_ptr<const ImageProxy> other) const
250 shared_ptr<const FFmpegImageProxy> mp = dynamic_pointer_cast<const FFmpegImageProxy> (other);
255 return _data == mp->_data;
259 FFmpegImageProxy::memory_used () const
261 size_t m = _data.size();
263 m += _image->memory_used();