Change MagickImageProxy to FFmpegImageProxy and make it use FFmpeg

to decode images.  Hence remove {Image,Graphics}Magick.

1 files changed, 214 insertions, 0 deletions

diff --git a/src/lib/ffmpeg_image_proxy.cc b/src/lib/ffmpeg_image_proxy.cc
new file mode 100644
index 000000000..c83bebcb5
--- /dev/null
+++ b/src/lib/ffmpeg_image_proxy.cc
@@ -0,0 +1,214 @@
+/*
+    Copyright (C) 2014-2018 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "ffmpeg_image_proxy.h"
+#include "cross.h"
+#include "exceptions.h"
+#include "dcpomatic_socket.h"
+#include "image.h"
+#include "compose.hpp"
+#include "util.h"
+#include <dcp/raw_convert.h>
+extern "C" {
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+}
+#include <libxml++/libxml++.h>
+#include <iostream>
+
+#include "i18n.h"
+
+using std::string;
+using std::cout;
+using std::pair;
+using std::min;
+using std::make_pair;
+using boost::shared_ptr;
+using boost::optional;
+using boost::dynamic_pointer_cast;
+using dcp::raw_convert;
+
+FFmpegImageProxy::FFmpegImageProxy (boost::filesystem::path path)
+	: _data (path)
+	, _pos (0)
+	, _path (path)
+{
+
+}
+
+FFmpegImageProxy::FFmpegImageProxy (dcp::Data data)
+	: _data (data)
+	, _pos (0)
+{
+
+}
+
+FFmpegImageProxy::FFmpegImageProxy (shared_ptr<cxml::Node>, shared_ptr<Socket> socket)
+	: _pos (0)
+{
+	uint32_t const size = socket->read_uint32 ();
+	_data = dcp::Data (size);
+	socket->read (_data.data().get(), size);
+}
+
+static int
+avio_read_wrapper (void* data, uint8_t* buffer, int amount)
+{
+	return reinterpret_cast<FFmpegImageProxy*>(data)->avio_read (buffer, amount);
+}
+
+static int64_t
+avio_seek_wrapper (void* data, int64_t offset, int whence)
+{
+	return reinterpret_cast<FFmpegImageProxy*>(data)->avio_seek (offset, whence);
+}
+
+int
+FFmpegImageProxy::avio_read (uint8_t* buffer, int const amount)
+{
+	int const to_do = min(int64_t(amount), _data.size() - _pos);
+	memcpy (buffer, _data.data().get() + _pos, to_do);
+	_pos += to_do;
+	return to_do;
+}
+
+int64_t
+FFmpegImageProxy::avio_seek (int64_t const pos, int whence)
+{
+	switch (whence) {
+	case AVSEEK_SIZE:
+		return _data.size();
+	case SEEK_CUR:
+		_pos += pos;
+		break;
+	case SEEK_SET:
+		_pos = pos;
+		break;
+	case SEEK_END:
+		_pos = _data.size() - pos;
+		break;
+	}
+
+	return _pos;
+}
+
+pair<shared_ptr<Image>, int>
+FFmpegImageProxy::image (optional<dcp::NoteHandler>, optional<dcp::Size>) const
+{
+	boost::mutex::scoped_lock lm (_mutex);
+
+	if (_image) {
+		return make_pair (_image, 0);
+	}
+
+	uint8_t* avio_buffer = static_cast<uint8_t*> (wrapped_av_malloc(4096));
+	AVIOContext* avio_context = avio_alloc_context (avio_buffer, 4096, 0, const_cast<FFmpegImageProxy*>(this), avio_read_wrapper, 0, avio_seek_wrapper);
+	AVFormatContext* format_context = avformat_alloc_context ();
+	format_context->pb = avio_context;
+
+	AVDictionary* options = 0;
+	/* These durations are in microseconds, and represent how far into the content file
+	   we will look for streams.
+	*/
+	av_dict_set (&options, "analyzeduration", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
+	av_dict_set (&options, "probesize", raw_convert<string>(5 * 60 * 1000000).c_str(), 0);
+
+	int e = avformat_open_input (&format_context, 0, 0, &options);
+	if (e < 0) {
+		throw OpenFileError (_path->string(), e, true);
+	}
+
+	if (avformat_find_stream_info(format_context, 0) < 0) {
+		throw DecodeError (_("could not find stream information"));
+	}
+
+	DCPOMATIC_ASSERT (format_context->nb_streams == 1);
+
+	AVFrame* frame = av_frame_alloc ();
+	if (!frame) {
+		throw DecodeError (N_("could not allocate frame"));
+	}
+
+	AVCodecContext* codec_context = format_context->streams[0]->codec;
+	AVCodec* codec = avcodec_find_decoder (codec_context->codec_id);
+	DCPOMATIC_ASSERT (codec);
+
+	if (avcodec_open2 (codec_context, codec, 0) < 0) {
+		throw DecodeError (N_("could not open decoder"));
+	}
+
+	AVPacket packet;
+	int r = av_read_frame (format_context, &packet);
+	if (r < 0) {
+		throw DecodeError (N_("could not read frame"));
+	}
+
+	int frame_finished;
+	if (avcodec_decode_video2(codec_context, frame, &frame_finished, &packet) < 0 || !frame_finished) {
+		throw DecodeError (N_("could not decode video"));
+	}
+
+	_image.reset (new Image (frame));
+
+	av_frame_free (&frame);
+	avformat_close_input (&format_context);
+	av_free (avio_context->buffer);
+	av_free (avio_context);
+
+	return make_pair (_image, 0);
+}
+
+void
+FFmpegImageProxy::add_metadata (xmlpp::Node* node) const
+{
+	node->add_child("Type")->add_child_text (N_("FFmpeg"));
+}
+
+void
+FFmpegImageProxy::send_binary (shared_ptr<Socket> socket) const
+{
+	socket->write (_data.size());
+	socket->write (_data.data().get(), _data.size());
+}
+
+bool
+FFmpegImageProxy::same (shared_ptr<const ImageProxy> other) const
+{
+	shared_ptr<const FFmpegImageProxy> mp = dynamic_pointer_cast<const FFmpegImageProxy> (other);
+	if (!mp) {
+		return false;
+	}
+
+	if (_data.size() != mp->_data.size()) {
+		return false;
+	}
+
+	return memcmp (_data.data().get(), mp->_data.data().get(), _data.size()) == 0;
+}
+
+size_t
+FFmpegImageProxy::memory_used () const
+{
+	size_t m = _data.size();
+	if (_image) {
+		m += _image->memory_used();
+	}
+	return m;
+}