Move things round a bit.

1 files changed, 392 insertions, 0 deletions

diff --git a/src/lib/image.cc b/src/lib/image.cc
new file mode 100644
index 000000000..7a9ac7dd5
--- /dev/null
+++ b/src/lib/image.cc
@@ -0,0 +1,392 @@
+/*
+    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+/** @file src/image.cc
+ *  @brief A set of classes to describe video images.
+ */
+
+#include <sstream>
+#include <iomanip>
+#include <iostream>
+#include <execinfo.h>
+#include <cxxabi.h>
+#include <sys/time.h>
+#include <boost/algorithm/string.hpp>
+#include <openjpeg.h>
+extern "C" {
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+#include <libswscale/swscale.h>
+#include <libswresample/swresample.h>
+#include <libavfilter/avfiltergraph.h>
+#include <libavfilter/avcodec.h>
+#include <libavfilter/buffersink.h>
+#include <libpostproc/postprocess.h>
+#include <libavutil/pixfmt.h>
+}
+#include "image.h"
+#include "exceptions.h"
+#include "scaler.h"
+
+#ifdef DEBUG_HASH
+#include <mhash.h>
+#endif
+
+using namespace std;
+using namespace boost;
+
+/** @param n Component index.
+ *  @return Number of lines in the image for the given component.
+ */
+int
+Image::lines (int n) const
+{
+	switch (_pixel_format) {
+	case PIX_FMT_YUV420P:
+		if (n == 0) {
+			return size().height;
+		} else {
+			return size().height / 2;
+		}
+		break;
+	case PIX_FMT_RGB24:
+		return size().height;
+	default:
+		assert (false);
+	}
+
+	return 0;
+}
+
+/** @return Number of components */
+int
+Image::components () const
+{
+	switch (_pixel_format) {
+	case PIX_FMT_YUV420P:
+		return 3;
+	case PIX_FMT_RGB24:
+		return 1;
+	default:
+		assert (false);
+	}
+
+	return 0;
+}
+
+#ifdef DEBUG_HASH
+/** Write a MD5 hash of the image's data to stdout.
+ *  @param n Title to give the output.
+ */
+void
+Image::hash (string n) const
+{
+	MHASH ht = mhash_init (MHASH_MD5);
+	if (ht == MHASH_FAILED) {
+		throw EncodeError ("could not create hash thread");
+	}
+	
+	for (int i = 0; i < components(); ++i) {
+		mhash (ht, data()[i], line_size()[i] * lines(i));
+	}
+	
+	uint8_t hash[16];
+	mhash_deinit (ht, hash);
+	
+	printf ("%s: ", n.c_str ());
+	for (int i = 0; i < int (mhash_get_block_size (MHASH_MD5)); ++i) {
+		printf ("%.2x", hash[i]);
+	}
+	printf ("\n");
+}
+#endif
+
+/** Scale this image to a given size and convert it to RGB.
+ *  @param out_size Output image size in pixels.
+ *  @param scaler Scaler to use.
+ */
+shared_ptr<RGBFrameImage>
+Image::scale_and_convert_to_rgb (Size out_size, int padding, Scaler const * scaler) const
+{
+	assert (scaler);
+
+	Size content_size = out_size;
+	content_size.width -= (padding * 2);
+
+	shared_ptr<RGBFrameImage> rgb (new RGBFrameImage (content_size));
+	
+	struct SwsContext* scale_context = sws_getContext (
+		size().width, size().height, pixel_format(),
+		content_size.width, content_size.height, PIX_FMT_RGB24,
+		scaler->ffmpeg_id (), 0, 0, 0
+		);
+
+	/* Scale and convert to RGB from whatever its currently in (which may be RGB) */
+	sws_scale (
+		scale_context,
+		data(), line_size(),
+		0, size().height,
+		rgb->data (), rgb->line_size ()
+		);
+
+	/* Put the image in the right place in a black frame if are padding; this is
+	   a bit grubby and expensive, but probably inconsequential in the great
+	   scheme of things.
+	*/
+	if (padding > 0) {
+		shared_ptr<RGBFrameImage> padded_rgb (new RGBFrameImage (out_size));
+		padded_rgb->make_black ();
+
+		/* XXX: we are cheating a bit here; we know the frame is RGB so we can
+		   make assumptions about its composition.
+		*/
+		uint8_t* p = padded_rgb->data()[0] + padding * 3;
+		uint8_t* q = rgb->data()[0];
+		for (int j = 0; j < rgb->lines(0); ++j) {
+			memcpy (p, q, rgb->line_size()[0]);
+			p += padded_rgb->line_size()[0];
+			q += rgb->line_size()[0];
+		}
+
+		rgb = padded_rgb;
+	}
+
+	sws_freeContext (scale_context);
+
+	return rgb;
+}
+
+/** Run a FFmpeg post-process on this image and return the processed version.
+ *  @param pp Flags for the required set of post processes.
+ *  @return Post-processed image.
+ */
+shared_ptr<PostProcessImage>
+Image::post_process (string pp) const
+{
+	shared_ptr<PostProcessImage> out (new PostProcessImage (PIX_FMT_YUV420P, size ()));
+	
+	pp_mode* mode = pp_get_mode_by_name_and_quality (pp.c_str (), PP_QUALITY_MAX);
+	pp_context* context = pp_get_context (size().width, size().height, PP_FORMAT_420 | PP_CPU_CAPS_MMX2);
+
+	pp_postprocess (
+		(const uint8_t **) data(), line_size(),
+		out->data(), out->line_size(),
+		size().width, size().height,
+		0, 0, mode, context, 0
+		);
+		
+	pp_free_mode (mode);
+	pp_free_context (context);
+
+	return out;
+}
+
+void
+Image::make_black ()
+{
+	switch (_pixel_format) {
+	case PIX_FMT_YUV420P:
+		memset (data()[0], 0, lines(0) * line_size()[0]);
+		memset (data()[1], 0x80, lines(1) * line_size()[1]);
+		memset (data()[2], 0x80, lines(2) * line_size()[2]);
+		break;
+
+	case PIX_FMT_RGB24:		
+		memset (data()[0], 0, lines(0) * line_size()[0]);
+		break;
+
+	default:
+		assert (false);
+	}
+}
+
+/** Construct a SimpleImage of a given size and format, allocating memory
+ *  as required.
+ *
+ *  @param p Pixel format.
+ *  @param s Size in pixels.
+ */
+SimpleImage::SimpleImage (PixelFormat p, Size s)
+	: Image (p)
+	, _size (s)
+{
+	_data = (uint8_t **) av_malloc (components() * sizeof (uint8_t *));
+	_line_size = (int *) av_malloc (components() * sizeof (int));
+	
+	for (int i = 0; i < components(); ++i) {
+		_data[i] = 0;
+		_line_size[i] = 0;
+	}
+}
+
+/** Destroy a SimpleImage */
+SimpleImage::~SimpleImage ()
+{
+	for (int i = 0; i < components(); ++i) {
+		av_free (_data[i]);
+	}
+
+	av_free (_data);
+	av_free (_line_size);
+}
+
+/** Set the size in bytes of each horizontal line of a given component.
+ *  @param i Component index.
+ *  @param s Size of line in bytes.
+ */
+void
+SimpleImage::set_line_size (int i, int s)
+{
+	_line_size[i] = s;
+	_data[i] = (uint8_t *) av_malloc (s * lines (i));
+}
+
+uint8_t **
+SimpleImage::data () const
+{
+	return _data;
+}
+
+int *
+SimpleImage::line_size () const
+{
+	return _line_size;
+}
+
+Size
+SimpleImage::size () const
+{
+	return _size;
+}
+
+
+FilterBufferImage::FilterBufferImage (PixelFormat p, AVFilterBufferRef* b)
+	: Image (p)
+	, _buffer (b)
+{
+
+}
+
+FilterBufferImage::~FilterBufferImage ()
+{
+	avfilter_unref_buffer (_buffer);
+}
+
+uint8_t **
+FilterBufferImage::data () const
+{
+	return _buffer->data;
+}
+
+int *
+FilterBufferImage::line_size () const
+{
+	return _buffer->linesize;
+}
+
+Size
+FilterBufferImage::size () const
+{
+	return Size (_buffer->video->w, _buffer->video->h);
+}
+
+/** XXX: this could be generalised to use any format, but I don't
+ *  understand how avpicture_fill is supposed to be called with
+ *  multi-planar images.
+ */
+RGBFrameImage::RGBFrameImage (Size s)
+	: Image (PIX_FMT_RGB24)
+	, _size (s)
+{
+	_frame = avcodec_alloc_frame ();
+	if (_frame == 0) {
+		throw EncodeError ("could not allocate frame");
+	}
+
+	_data = (uint8_t *) av_malloc (size().width * size().height * 3);
+	avpicture_fill ((AVPicture *) _frame, _data, PIX_FMT_RGB24, size().width, size().height);
+	_frame->width = size().width;
+	_frame->height = size().height;
+	_frame->format = PIX_FMT_RGB24;
+}
+
+RGBFrameImage::~RGBFrameImage ()
+{
+	av_free (_data);
+	av_free (_frame);
+}
+
+uint8_t **
+RGBFrameImage::data () const
+{
+	return _frame->data;
+}
+
+int *
+RGBFrameImage::line_size () const
+{
+	return _frame->linesize;
+}
+
+Size
+RGBFrameImage::size () const
+{
+	return _size;
+}
+
+PostProcessImage::PostProcessImage (PixelFormat p, Size s)
+	: Image (p)
+	, _size (s)
+{
+	_data = new uint8_t*[4];
+	_line_size = new int[4];
+	
+	for (int i = 0; i < 4; ++i) {
+		_data[i] = (uint8_t *) av_malloc (s.width * s.height);
+		_line_size[i] = s.width;
+	}
+}
+
+PostProcessImage::~PostProcessImage ()
+{
+	for (int i = 0; i < 4; ++i) {
+		av_free (_data[i]);
+	}
+	
+	delete[] _data;
+	delete[] _line_size;
+}
+
+uint8_t **
+PostProcessImage::data () const
+{
+	return _data;
+}
+
+int *
+PostProcessImage::line_size () const
+{
+	return _line_size;
+}
+
+Size
+PostProcessImage::size () const
+{
+	return _size;
+}