mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-17 15:18:11 +00:00
108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
|
|
*
|
|
* ScummVM is the legal property of its developers, whose names
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
|
* file distributed with this source distribution.
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
*/
|
|
|
|
#include "common/debug.h"
|
|
#include "common/stream.h"
|
|
#include "common/system.h"
|
|
#include "common/textconsole.h"
|
|
#include "graphics/surface.h"
|
|
#include "graphics/yuv_to_rgb.h"
|
|
|
|
#include "video/codecs/mpeg.h"
|
|
|
|
namespace Video {
|
|
|
|
MPEGDecoder::MPEGDecoder() : Codec() {
|
|
_pixelFormat = g_system->getScreenFormat();
|
|
_surface = 0;
|
|
|
|
_mpegDecoder = mpeg2_init();
|
|
|
|
if (!_mpegDecoder)
|
|
error("Could not initialize libmpeg2");
|
|
|
|
_mpegInfo = mpeg2_info(_mpegDecoder);
|
|
}
|
|
|
|
MPEGDecoder::~MPEGDecoder() {
|
|
mpeg2_close(_mpegDecoder);
|
|
|
|
if (_surface) {
|
|
_surface->free();
|
|
delete _surface;
|
|
}
|
|
}
|
|
|
|
const Graphics::Surface *MPEGDecoder::decodeImage(Common::SeekableReadStream *stream) {
|
|
uint32 framePeriod;
|
|
decodePacket(stream, framePeriod);
|
|
return _surface;
|
|
}
|
|
|
|
bool MPEGDecoder::decodePacket(Common::SeekableReadStream *packet, uint32 &framePeriod, Graphics::Surface *dst) {
|
|
// Decode as much as we can out of this packet
|
|
uint32 size = 0xFFFFFFFF;
|
|
mpeg2_state_t state;
|
|
bool foundFrame = false;
|
|
framePeriod = 0;
|
|
|
|
do {
|
|
state = mpeg2_parse(_mpegDecoder);
|
|
|
|
switch (state) {
|
|
case STATE_BUFFER:
|
|
size = packet->read(_buffer, BUFFER_SIZE);
|
|
mpeg2_buffer(_mpegDecoder, _buffer, _buffer + size);
|
|
break;
|
|
case STATE_SLICE:
|
|
case STATE_END:
|
|
if (_mpegInfo->display_fbuf) {
|
|
foundFrame = true;
|
|
const mpeg2_sequence_t *sequence = _mpegInfo->sequence;
|
|
|
|
framePeriod += sequence->frame_period;
|
|
|
|
if (!dst) {
|
|
// If no destination is specified, use our internal storage
|
|
if (!_surface) {
|
|
_surface = new Graphics::Surface();
|
|
_surface->create(sequence->picture_width, sequence->picture_height, _pixelFormat);
|
|
}
|
|
|
|
dst = _surface;
|
|
}
|
|
|
|
YUVToRGBMan.convert420(dst, Graphics::YUVToRGBManager::kScaleITU, _mpegInfo->display_fbuf->buf[0],
|
|
_mpegInfo->display_fbuf->buf[1], _mpegInfo->display_fbuf->buf[2], sequence->picture_width,
|
|
sequence->picture_height, sequence->width, sequence->chroma_width);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} while (size != 0);
|
|
|
|
return foundFrame;
|
|
}
|
|
|
|
} // End of namespace Video
|