mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-27 21:20:41 +00:00
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/*
|
|
* Micrsoft RLE Video Decoder
|
|
* Copyright (C) 2003 the ffmpeg project
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file msrle.c
|
|
* MS RLE Video Decoder by Mike Melanson (melanson@pcisys.net)
|
|
* For more information about the MS RLE format, visit:
|
|
* http://www.pcisys.net/~melanson/codecs/
|
|
*
|
|
* The MS RLE decoder outputs PAL8 colorspace data.
|
|
*
|
|
* Note that this decoder expects the palette colors from the end of the
|
|
* BITMAPINFO header passed through palctrl.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "avcodec.h"
|
|
#include "dsputil.h"
|
|
#include "msrledec.h"
|
|
|
|
typedef struct MsrleContext {
|
|
AVCodecContext *avctx;
|
|
AVFrame frame;
|
|
|
|
const unsigned char *buf;
|
|
int size;
|
|
|
|
} MsrleContext;
|
|
|
|
static av_cold int msrle_decode_init(AVCodecContext *avctx)
|
|
{
|
|
MsrleContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
|
|
avctx->pix_fmt = PIX_FMT_PAL8;
|
|
s->frame.data[0] = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int msrle_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
MsrleContext *s = avctx->priv_data;
|
|
|
|
s->buf = buf;
|
|
s->size = buf_size;
|
|
|
|
s->frame.reference = 1;
|
|
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");
|
|
return -1;
|
|
}
|
|
|
|
/* make the palette available */
|
|
memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
|
|
if (s->avctx->palctrl->palette_changed) {
|
|
s->frame.palette_has_changed = 1;
|
|
s->avctx->palctrl->palette_changed = 0;
|
|
}
|
|
|
|
ff_msrle_decode(avctx, &s->frame, avctx->bits_per_coded_sample, buf, buf_size);
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = s->frame;
|
|
|
|
/* report that the buffer was completely consumed */
|
|
return buf_size;
|
|
}
|
|
|
|
static av_cold int msrle_decode_end(AVCodecContext *avctx)
|
|
{
|
|
MsrleContext *s = avctx->priv_data;
|
|
|
|
/* release the last frame */
|
|
if (s->frame.data[0])
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec msrle_decoder = {
|
|
"msrle",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MSRLE,
|
|
sizeof(MsrleContext),
|
|
msrle_decode_init,
|
|
NULL,
|
|
msrle_decode_end,
|
|
msrle_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
.long_name= NULL_IF_CONFIG_SMALL("Microsoft RLE"),
|
|
};
|