2003-10-01 06:39:38 +02:00
|
|
|
/*
|
2011-12-12 21:21:24 +01:00
|
|
|
* Microsoft RLE video decoder
|
2003-10-01 06:39:38 +02:00
|
|
|
* Copyright (C) 2003 the ffmpeg project
|
|
|
|
*
|
2006-10-07 17:30:46 +02:00
|
|
|
* This file is part of FFmpeg.
|
|
|
|
*
|
|
|
|
* FFmpeg is free software; you can redistribute it and/or
|
2003-10-01 06:39:38 +02:00
|
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
|
|
* License as published by the Free Software Foundation; either
|
2006-10-07 17:30:46 +02:00
|
|
|
* version 2.1 of the License, or (at your option) any later version.
|
2003-10-01 06:39:38 +02:00
|
|
|
*
|
2006-10-07 17:30:46 +02:00
|
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
2003-10-01 06:39:38 +02:00
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
* Lesser General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU Lesser General Public
|
2006-10-07 17:30:46 +02:00
|
|
|
* License along with FFmpeg; if not, write to the Free Software
|
2006-01-12 23:43:26 +01:00
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
2003-10-01 06:39:38 +02:00
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
2010-04-20 16:45:34 +02:00
|
|
|
* @file
|
2011-12-12 21:21:24 +01:00
|
|
|
* MS RLE video decoder by Mike Melanson (melanson@pcisys.net)
|
2003-10-01 06:39:38 +02:00
|
|
|
* For more information about the MS RLE format, visit:
|
|
|
|
* http://www.pcisys.net/~melanson/codecs/
|
|
|
|
*
|
|
|
|
* The MS RLE decoder outputs PAL8 colorspace data.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
|
|
|
|
#include "avcodec.h"
|
|
|
|
#include "dsputil.h"
|
2008-09-18 07:20:54 +02:00
|
|
|
#include "msrledec.h"
|
2003-10-01 06:39:38 +02:00
|
|
|
|
|
|
|
typedef struct MsrleContext {
|
|
|
|
AVCodecContext *avctx;
|
|
|
|
AVFrame frame;
|
|
|
|
|
2012-03-31 19:10:54 +02:00
|
|
|
GetByteContext gb;
|
2008-02-01 04:26:31 +01:00
|
|
|
const unsigned char *buf;
|
2003-10-01 06:39:38 +02:00
|
|
|
int size;
|
|
|
|
|
2011-04-09 15:49:51 +02:00
|
|
|
uint32_t pal[256];
|
2003-10-01 06:39:38 +02:00
|
|
|
} MsrleContext;
|
|
|
|
|
2008-03-21 04:11:20 +01:00
|
|
|
static av_cold int msrle_decode_init(AVCodecContext *avctx)
|
2003-10-01 06:39:38 +02:00
|
|
|
{
|
2007-04-08 22:24:16 +02:00
|
|
|
MsrleContext *s = avctx->priv_data;
|
2012-08-06 19:34:09 +02:00
|
|
|
int i;
|
2003-10-01 06:39:38 +02:00
|
|
|
|
|
|
|
s->avctx = avctx;
|
|
|
|
|
2009-05-27 23:45:25 +02:00
|
|
|
switch (avctx->bits_per_coded_sample) {
|
2011-05-12 12:16:43 +02:00
|
|
|
case 1:
|
2012-10-08 20:54:00 +02:00
|
|
|
avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
|
2011-05-12 12:16:43 +02:00
|
|
|
break;
|
2009-05-27 23:45:25 +02:00
|
|
|
case 4:
|
|
|
|
case 8:
|
2012-10-06 12:10:34 +02:00
|
|
|
avctx->pix_fmt = AV_PIX_FMT_PAL8;
|
2009-05-27 23:45:25 +02:00
|
|
|
break;
|
|
|
|
case 24:
|
2012-10-06 12:10:34 +02:00
|
|
|
avctx->pix_fmt = AV_PIX_FMT_BGR24;
|
2009-05-27 23:45:25 +02:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "unsupported bits per sample\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2011-05-02 02:15:15 +02:00
|
|
|
avcodec_get_frame_defaults(&s->frame);
|
2003-11-26 21:57:15 +01:00
|
|
|
s->frame.data[0] = NULL;
|
2003-10-01 06:39:38 +02:00
|
|
|
|
2012-08-06 19:34:09 +02:00
|
|
|
if (avctx->extradata_size >= AVPALETTE_SIZE)
|
|
|
|
for (i = 0; i < AVPALETTE_SIZE/4; i++)
|
|
|
|
s->pal[i] = 0xFF<<24 | AV_RL32(avctx->extradata+4*i);
|
|
|
|
|
2003-10-01 06:39:38 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int msrle_decode_frame(AVCodecContext *avctx,
|
|
|
|
void *data, int *data_size,
|
2009-04-07 17:59:50 +02:00
|
|
|
AVPacket *avpkt)
|
2003-10-01 06:39:38 +02:00
|
|
|
{
|
2009-04-07 17:59:50 +02:00
|
|
|
const uint8_t *buf = avpkt->data;
|
|
|
|
int buf_size = avpkt->size;
|
2007-04-08 22:24:16 +02:00
|
|
|
MsrleContext *s = avctx->priv_data;
|
2009-05-27 23:45:25 +02:00
|
|
|
int istride = FFALIGN(avctx->width*avctx->bits_per_coded_sample, 32) / 8;
|
2003-10-01 06:39:38 +02:00
|
|
|
|
|
|
|
s->buf = buf;
|
|
|
|
s->size = buf_size;
|
|
|
|
|
2011-11-05 19:48:39 +01:00
|
|
|
s->frame.reference = 3;
|
2003-11-26 21:57:15 +01:00
|
|
|
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
|
|
|
|
if (avctx->reget_buffer(avctx, &s->frame)) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
|
2003-10-01 06:39:38 +02:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2011-05-15 02:38:02 +02:00
|
|
|
if (avctx->bits_per_coded_sample > 1 && avctx->bits_per_coded_sample <= 8) {
|
2011-04-09 15:49:51 +02:00
|
|
|
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
|
|
|
|
|
|
|
|
if (pal) {
|
2009-05-10 21:11:06 +02:00
|
|
|
s->frame.palette_has_changed = 1;
|
2011-04-09 15:49:51 +02:00
|
|
|
memcpy(s->pal, pal, AVPALETTE_SIZE);
|
2009-05-10 21:11:06 +02:00
|
|
|
}
|
2012-08-11 02:20:06 +02:00
|
|
|
/* make the palette available */
|
|
|
|
memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE);
|
2009-05-10 21:10:37 +02:00
|
|
|
}
|
2003-10-01 06:39:38 +02:00
|
|
|
|
2009-05-27 23:45:25 +02:00
|
|
|
/* FIXME how to correctly detect RLE ??? */
|
|
|
|
if (avctx->height * istride == avpkt->size) { /* assume uncompressed */
|
2011-08-16 23:41:09 +02:00
|
|
|
int linesize = (avctx->width * avctx->bits_per_coded_sample + 7) / 8;
|
2009-05-27 23:45:25 +02:00
|
|
|
uint8_t *ptr = s->frame.data[0];
|
|
|
|
uint8_t *buf = avpkt->data + (avctx->height-1)*istride;
|
|
|
|
int i, j;
|
|
|
|
|
|
|
|
for (i = 0; i < avctx->height; i++) {
|
|
|
|
if (avctx->bits_per_coded_sample == 4) {
|
|
|
|
for (j = 0; j < avctx->width - 1; j += 2) {
|
|
|
|
ptr[j+0] = buf[j>>1] >> 4;
|
|
|
|
ptr[j+1] = buf[j>>1] & 0xF;
|
|
|
|
}
|
|
|
|
if (avctx->width & 1)
|
|
|
|
ptr[j+0] = buf[j>>1] >> 4;
|
|
|
|
} else {
|
|
|
|
memcpy(ptr, buf, linesize);
|
|
|
|
}
|
|
|
|
buf -= istride;
|
|
|
|
ptr += s->frame.linesize[0];
|
|
|
|
}
|
|
|
|
} else {
|
2012-03-31 19:10:54 +02:00
|
|
|
bytestream2_init(&s->gb, buf, buf_size);
|
|
|
|
ff_msrle_decode(avctx, (AVPicture*)&s->frame, avctx->bits_per_coded_sample, &s->gb);
|
2009-05-27 23:45:25 +02:00
|
|
|
}
|
2008-09-18 07:20:54 +02:00
|
|
|
|
2003-10-01 06:39:38 +02:00
|
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
*(AVFrame*)data = s->frame;
|
|
|
|
|
|
|
|
/* report that the buffer was completely consumed */
|
|
|
|
return buf_size;
|
|
|
|
}
|
|
|
|
|
2008-03-21 04:11:20 +01:00
|
|
|
static av_cold int msrle_decode_end(AVCodecContext *avctx)
|
2003-10-01 06:39:38 +02:00
|
|
|
{
|
2007-04-08 22:24:16 +02:00
|
|
|
MsrleContext *s = avctx->priv_data;
|
2003-10-01 06:39:38 +02:00
|
|
|
|
|
|
|
/* release the last frame */
|
2003-11-26 21:57:15 +01:00
|
|
|
if (s->frame.data[0])
|
|
|
|
avctx->release_buffer(avctx, &s->frame);
|
2003-10-01 06:39:38 +02:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 22:40:11 +01:00
|
|
|
AVCodec ff_msrle_decoder = {
|
2011-07-17 12:54:31 +02:00
|
|
|
.name = "msrle",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
2012-08-05 11:11:04 +02:00
|
|
|
.id = AV_CODEC_ID_MSRLE,
|
2011-07-17 12:54:31 +02:00
|
|
|
.priv_data_size = sizeof(MsrleContext),
|
|
|
|
.init = msrle_decode_init,
|
|
|
|
.close = msrle_decode_end,
|
|
|
|
.decode = msrle_decode_frame,
|
|
|
|
.capabilities = CODEC_CAP_DR1,
|
2012-04-06 18:19:39 +02:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("Microsoft RLE"),
|
2003-10-01 06:39:38 +02:00
|
|
|
};
|