early-access version 1432
This commit is contained in:
pineappleEA
192
externals/ffmpeg/libavcodec/mwsc.c
vendored
Executable file
192
externals/ffmpeg/libavcodec/mwsc.c
vendored
Executable file
@@ -0,0 +1,192 @@
|
||||
/*
|
||||
* MatchWare Screen Capture Codec decoder
|
||||
*
|
||||
* Copyright (c) 2018 Paul B Mahol
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "avcodec.h"
|
||||
#include "bytestream.h"
|
||||
#include "internal.h"
|
||||
|
||||
#include <zlib.h>
|
||||
|
||||
typedef struct MWSCContext {
|
||||
unsigned int decomp_size;
|
||||
uint8_t *decomp_buf;
|
||||
z_stream zstream;
|
||||
AVFrame *prev_frame;
|
||||
} MWSCContext;
|
||||
|
||||
static int rle_uncompress(GetByteContext *gb, PutByteContext *pb, GetByteContext *gbp,
|
||||
int width, int height, int stride, int pb_linesize, int gbp_linesize)
|
||||
{
|
||||
int intra = 1, w = 0;
|
||||
|
||||
bytestream2_seek_p(pb, (height - 1) * pb_linesize, SEEK_SET);
|
||||
|
||||
while (bytestream2_get_bytes_left(gb) > 0) {
|
||||
uint32_t fill = bytestream2_get_le24(gb);
|
||||
unsigned run = bytestream2_get_byte(gb);
|
||||
|
||||
if (run == 0) {
|
||||
run = bytestream2_get_le32(gb);
|
||||
for (int j = 0; j < run; j++, w++) {
|
||||
if (w == width) {
|
||||
w = 0;
|
||||
bytestream2_seek_p(pb, -(pb_linesize + stride), SEEK_CUR);
|
||||
}
|
||||
bytestream2_put_le24(pb, fill);
|
||||
}
|
||||
} else if (run == 255) {
|
||||
int pos = bytestream2_tell_p(pb);
|
||||
|
||||
bytestream2_seek(gbp, pos, SEEK_SET);
|
||||
for (int j = 0; j < fill; j++, w++) {
|
||||
if (w == width) {
|
||||
w = 0;
|
||||
bytestream2_seek_p(pb, -(pb_linesize + stride), SEEK_CUR);
|
||||
bytestream2_seek(gbp, -(gbp_linesize + stride), SEEK_CUR);
|
||||
}
|
||||
bytestream2_put_le24(pb, bytestream2_get_le24(gbp));
|
||||
}
|
||||
|
||||
intra = 0;
|
||||
} else {
|
||||
for (int j = 0; j < run; j++, w++) {
|
||||
if (w == width) {
|
||||
w = 0;
|
||||
bytestream2_seek_p(pb, -(pb_linesize + stride), SEEK_CUR);
|
||||
}
|
||||
bytestream2_put_le24(pb, fill);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return intra;
|
||||
}
|
||||
|
||||
static int decode_frame(AVCodecContext *avctx,
|
||||
void *data, int *got_frame,
|
||||
AVPacket *avpkt)
|
||||
{
|
||||
MWSCContext *s = avctx->priv_data;
|
||||
AVFrame *frame = data;
|
||||
uint8_t *buf = avpkt->data;
|
||||
int buf_size = avpkt->size;
|
||||
GetByteContext gb;
|
||||
GetByteContext gbp;
|
||||
PutByteContext pb;
|
||||
int ret;
|
||||
|
||||
ret = inflateReset(&s->zstream);
|
||||
if (ret != Z_OK) {
|
||||
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
|
||||
return AVERROR_EXTERNAL;
|
||||
}
|
||||
s->zstream.next_in = buf;
|
||||
s->zstream.avail_in = buf_size;
|
||||
s->zstream.next_out = s->decomp_buf;
|
||||
s->zstream.avail_out = s->decomp_size;
|
||||
ret = inflate(&s->zstream, Z_FINISH);
|
||||
if (ret != Z_STREAM_END) {
|
||||
av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", ret);
|
||||
return AVERROR_EXTERNAL;
|
||||
}
|
||||
|
||||
if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
|
||||
return ret;
|
||||
|
||||
bytestream2_init(&gb, s->decomp_buf, s->zstream.total_out);
|
||||
bytestream2_init(&gbp, s->prev_frame->data[0], avctx->height * s->prev_frame->linesize[0]);
|
||||
bytestream2_init_writer(&pb, frame->data[0], avctx->height * frame->linesize[0]);
|
||||
|
||||
frame->key_frame = rle_uncompress(&gb, &pb, &gbp, avctx->width, avctx->height, avctx->width * 3,
|
||||
frame->linesize[0], s->prev_frame->linesize[0]);
|
||||
|
||||
frame->pict_type = frame->key_frame ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
|
||||
|
||||
av_frame_unref(s->prev_frame);
|
||||
if ((ret = av_frame_ref(s->prev_frame, frame)) < 0)
|
||||
return ret;
|
||||
|
||||
*got_frame = 1;
|
||||
|
||||
return avpkt->size;
|
||||
}
|
||||
|
||||
static av_cold int decode_init(AVCodecContext *avctx)
|
||||
{
|
||||
MWSCContext *s = avctx->priv_data;
|
||||
int64_t size;
|
||||
int zret;
|
||||
|
||||
avctx->pix_fmt = AV_PIX_FMT_BGR24;
|
||||
|
||||
size = 32LL * avctx->height * avctx->width;
|
||||
if (size >= INT32_MAX)
|
||||
return AVERROR_INVALIDDATA;
|
||||
s->decomp_size = size;
|
||||
if (!(s->decomp_buf = av_malloc(s->decomp_size)))
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
s->zstream.zalloc = Z_NULL;
|
||||
s->zstream.zfree = Z_NULL;
|
||||
s->zstream.opaque = Z_NULL;
|
||||
zret = inflateInit(&s->zstream);
|
||||
if (zret != Z_OK) {
|
||||
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
|
||||
return AVERROR_EXTERNAL;
|
||||
}
|
||||
|
||||
s->prev_frame = av_frame_alloc();
|
||||
if (!s->prev_frame)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static av_cold int decode_close(AVCodecContext *avctx)
|
||||
{
|
||||
MWSCContext *s = avctx->priv_data;
|
||||
|
||||
av_frame_free(&s->prev_frame);
|
||||
av_freep(&s->decomp_buf);
|
||||
s->decomp_size = 0;
|
||||
inflateEnd(&s->zstream);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
AVCodec ff_mwsc_decoder = {
|
||||
.name = "mwsc",
|
||||
.long_name = NULL_IF_CONFIG_SMALL("MatchWare Screen Capture Codec"),
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.id = AV_CODEC_ID_MWSC,
|
||||
.priv_data_size = sizeof(MWSCContext),
|
||||
.init = decode_init,
|
||||
.close = decode_close,
|
||||
.decode = decode_frame,
|
||||
.capabilities = AV_CODEC_CAP_DR1,
|
||||
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
|
||||
FF_CODEC_CAP_INIT_CLEANUP,
|
||||
};
|
||||
Reference in New Issue
Block a user