mirror of
https://github.com/libretro/scummvm.git
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220 lines
7.2 KiB
C++
220 lines
7.2 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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// Based on LGPL MJPEG/AVI to JPEG/JFIF conversion code from libav
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// Copyright (c) 2010 Adrian Daerr and Nicolas George
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// That in turn was adapted from mjpeg2jpeg.c, with original copyright:
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// Paris 2010 Adrian Daerr, public domain
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#include "common/memstream.h"
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#include "common/system.h"
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#include "common/textconsole.h"
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#include "graphics/surface.h"
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#include "image/jpeg.h"
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#include "image/codecs/mjpeg.h"
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namespace Common {
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class SeekableReadStream;
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}
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namespace Image {
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MJPEGDecoder::MJPEGDecoder() : Codec() {
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_pixelFormat = g_system->getScreenFormat();
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_surface = 0;
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}
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MJPEGDecoder::~MJPEGDecoder() {
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if (_surface) {
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_surface->free();
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delete _surface;
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}
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}
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// Header to be inserted
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static const byte s_jpegHeader[] = {
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0xff, 0xd8, // SOI
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0xff, 0xe0, // APP0
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0x00, 0x10, // APP0 header size (including
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// this field, but excluding preceding)
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'J', 'F', 'I', 'F', 0x00, // ID string 'JFIF\0'
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0x01, 0x01, // version
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0x00, // bits per type
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0x00, 0x00, // X density
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0x00, 0x00, // Y density
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0x00, // X thumbnail size
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0x00
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};
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enum {
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DHT_SEGMENT_SIZE = 420
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};
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static const byte s_dhtSegmentHead[] = { 0xFF, 0xC4, 0x01, 0xA2, 0x00 };
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static const byte s_dhtSegmentFrag[] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
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0x0a, 0x0b, 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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// Set up the standard Huffman tables (cf. JPEG standard section K.3)
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// IMPORTANT: these are only valid for 8-bit data precision!
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static const byte s_mjpegBitsDCLuminance[17] = {
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/* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
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};
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static const byte s_mjpegValDC[12] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
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};
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#if 0
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static const byte s_mjpegBitsDCChrominance[17] = {
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/* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
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};
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#endif
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static const byte s_mjpegBitsACLuminance[17] = {
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/* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
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};
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static const byte s_mjpegValACLuminance[] = {
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0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
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0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
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0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
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0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
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0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
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0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
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0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
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0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
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0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
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0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
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0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
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0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
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0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
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0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
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0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
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0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
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0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
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0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
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0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
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0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
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0xf9, 0xfa
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};
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static const byte s_mjpegBitsACChrominance[17] = {
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/* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
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};
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static const byte s_mjpegValACChrominance[] = {
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0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
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0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
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0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
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0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
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0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
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0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
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0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
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0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
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0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
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0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
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0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
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0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
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0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
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0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
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0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
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0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
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0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
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0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
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0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
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0xf9, 0xfa
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};
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const Graphics::Surface *MJPEGDecoder::decodeFrame(Common::SeekableReadStream &stream) {
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// We need to reconstruct an actual JPEG stream here, then feed it to the JPEG decoder
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// Yes, this is a pain.
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stream.readUint32BE(); // Skip nonsense JPEG header
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uint16 inputSkip = stream.readUint16BE() + 4;
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uint32 tag = stream.readUint32BE();
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if (tag != MKTAG('A', 'V', 'I', '1')) {
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warning("Invalid MJPEG tag found");
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return 0;
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}
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uint32 outputSize = stream.size() - inputSkip + sizeof(s_jpegHeader) + DHT_SEGMENT_SIZE;
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byte *data = (byte *)malloc(outputSize);
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if (!data) {
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warning("Failed to allocate data for MJPEG conversion");
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return 0;
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}
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// Copy the header
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memcpy(data, s_jpegHeader, sizeof(s_jpegHeader));
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uint32 dataOffset = sizeof(s_jpegHeader);
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// Write the fake DHT segment
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memcpy(data + dataOffset, s_dhtSegmentHead, sizeof(s_dhtSegmentHead));
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dataOffset += sizeof(s_dhtSegmentHead);
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memcpy(data + dataOffset, s_mjpegBitsDCLuminance + 1, 16);
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dataOffset += 16;
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memcpy(data + dataOffset, s_dhtSegmentFrag, sizeof(s_dhtSegmentFrag));
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dataOffset += sizeof(s_dhtSegmentFrag);
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memcpy(data + dataOffset, s_mjpegValDC, 12);
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dataOffset += 12;
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data[dataOffset++] = 0x10;
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memcpy(data + dataOffset, s_mjpegBitsACLuminance + 1, 16);
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dataOffset += 16;
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memcpy(data + dataOffset, s_mjpegValACLuminance, 162);
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dataOffset += 162;
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data[dataOffset++] = 0x11;
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memcpy(data + dataOffset, s_mjpegBitsACChrominance + 1, 16);
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dataOffset += 16;
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memcpy(data + dataOffset, s_mjpegValACChrominance, 162);
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dataOffset += 162;
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// Write the actual data
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stream.seek(inputSkip);
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stream.read(data + dataOffset, stream.size() - inputSkip);
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Common::MemoryReadStream convertedStream(data, outputSize, DisposeAfterUse::YES);
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JPEGDecoder jpeg;
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if (!jpeg.loadStream(convertedStream)) {
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warning("Failed to decode MJPEG frame");
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return 0;
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}
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if (_surface) {
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_surface->free();
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delete _surface;
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}
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_surface = jpeg.getSurface()->convertTo(_pixelFormat);
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return _surface;
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}
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} // End of namespace Image
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