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>
33 #include <libavutil/pixdesc.h>
35 DCPOMATIC_DISABLE_WARNINGS
36 #include <libxml++/libxml++.h>
37 DCPOMATIC_ENABLE_WARNINGS
47 using boost::shared_ptr;
48 using boost::optional;
49 using boost::dynamic_pointer_cast;
50 using dcp::raw_convert;
52 FFmpegImageProxy::FFmpegImageProxy (boost::filesystem::path path, VideoRange video_range)
54 , _video_range (video_range)
61 FFmpegImageProxy::FFmpegImageProxy (dcp::ArrayData data, VideoRange video_range)
63 , _video_range (video_range)
69 FFmpegImageProxy::FFmpegImageProxy (shared_ptr<cxml::Node> node, shared_ptr<Socket> socket)
70 : _video_range (string_to_video_range(node->string_child("VideoRange")))
73 uint32_t const size = socket->read_uint32 ();
74 _data = dcp::ArrayData (size);
75 socket->read (_data.data(), size);
79 avio_read_wrapper (void* data, uint8_t* buffer, int amount)
81 return reinterpret_cast<FFmpegImageProxy*>(data)->avio_read (buffer, amount);
85 avio_seek_wrapper (void* data, int64_t offset, int whence)
87 return reinterpret_cast<FFmpegImageProxy*>(data)->avio_seek (offset, whence);
91 FFmpegImageProxy::avio_read (uint8_t* buffer, int const amount)
93 int const to_do = min(static_cast<int64_t>(amount), static_cast<int64_t>(_data.size()) - _pos);
97 memcpy (buffer, _data.data() + _pos, to_do);
103 FFmpegImageProxy::avio_seek (int64_t const pos, int whence)
115 _pos = _data.size() - pos;
122 DCPOMATIC_DISABLE_WARNINGS
125 FFmpegImageProxy::image (optional<dcp::Size>) const
127 boost::mutex::scoped_lock lm (_mutex);
130 return Result (_image, 0);
133 uint8_t* avio_buffer = static_cast<uint8_t*> (wrapped_av_malloc(4096));
134 AVIOContext* avio_context = avio_alloc_context (avio_buffer, 4096, 0, const_cast<FFmpegImageProxy*>(this), avio_read_wrapper, 0, avio_seek_wrapper);
135 AVFormatContext* format_context = avformat_alloc_context ();
136 format_context->pb = avio_context;
138 AVDictionary* options = 0;
139 /* These durations are in microseconds, and represent how far into the content file
140 we will look for streams.
142 av_dict_set (&options, "analyzeduration", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
143 av_dict_set (&options, "probesize", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
145 int e = avformat_open_input (&format_context, 0, 0, &options);
146 if ((e < 0 && e == AVERROR_INVALIDDATA) || (e >= 0 && format_context->probe_score <= 25)) {
147 /* Hack to fix loading of .tga files through AVIOContexts (rather then
148 directly from the file). This code just does enough to allow the
149 probe code to take a hint from "foo.tga" and so try targa format.
151 AVInputFormat* f = av_find_input_format ("image2");
152 format_context = avformat_alloc_context ();
153 format_context->pb = avio_context;
154 format_context->iformat = f;
155 e = avformat_open_input (&format_context, "foo.tga", f, &options);
159 throw OpenFileError (_path->string(), e, OpenFileError::READ);
161 boost::throw_exception(DecodeError(String::compose(_("Could not decode image (%1)"), e)));
165 if (avformat_find_stream_info(format_context, 0) < 0) {
166 throw DecodeError (_("could not find stream information"));
169 DCPOMATIC_ASSERT (format_context->nb_streams == 1);
171 AVFrame* frame = av_frame_alloc ();
173 throw DecodeError (N_("could not allocate frame"));
176 AVCodecContext* codec_context = format_context->streams[0]->codec;
177 AVCodec* codec = avcodec_find_decoder (codec_context->codec_id);
178 DCPOMATIC_ASSERT (codec);
180 if (avcodec_open2 (codec_context, codec, 0) < 0) {
181 throw DecodeError (N_("could not open decoder"));
185 int r = av_read_frame (format_context, &packet);
187 throw DecodeError (N_("could not read frame"));
191 if (avcodec_decode_video2(codec_context, frame, &frame_finished, &packet) < 0 || !frame_finished) {
192 throw DecodeError (N_("could not decode video"));
195 AVPixelFormat const pix_fmt = static_cast<AVPixelFormat>(frame->format);
197 _image.reset (new Image(frame));
198 if (_video_range == VIDEO_RANGE_VIDEO && av_pix_fmt_desc_get(pix_fmt)->flags & AV_PIX_FMT_FLAG_RGB) {
199 /* Asking for the video range to be converted by libswscale (in Image) will not work for
200 * RGB sources since that method only processes video range in YUV and greyscale. So we have
201 * to do it ourselves here.
203 _image->video_range_to_full_range();
206 av_packet_unref (&packet);
207 av_frame_free (&frame);
208 avcodec_close (codec_context);
209 avformat_close_input (&format_context);
210 av_free (avio_context->buffer);
211 av_free (avio_context);
213 return Result (_image, 0);
216 DCPOMATIC_ENABLE_WARNINGS
219 FFmpegImageProxy::add_metadata (xmlpp::Node* node) const
221 node->add_child("Type")->add_child_text (N_("FFmpeg"));
222 node->add_child("VideoRange")->add_child_text(video_range_to_string(_video_range));
226 FFmpegImageProxy::write_to_socket (shared_ptr<Socket> socket) const
228 socket->write (_data.size());
229 socket->write (_data.data(), _data.size());
233 FFmpegImageProxy::same (shared_ptr<const ImageProxy> other) const
235 shared_ptr<const FFmpegImageProxy> mp = dynamic_pointer_cast<const FFmpegImageProxy> (other);
240 return _data == mp->_data;
244 FFmpegImageProxy::memory_used () const
246 size_t m = _data.size();
248 m += _image->memory_used();