* KMVC decoder
* Copyright (c) 2006 Konstantin Shishkov
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
- * @file kmvc.c
+ * @file libavcodec/kmvc.c
* Karl Morton's Video Codec decoder
*/
#include <stdio.h>
#include <stdlib.h>
-#include "common.h"
#include "avcodec.h"
+#include "bytestream.h"
#define KMVC_KEYFRAME 0x80
#define KMVC_PALETTE 0x40
} \
}
-static void kmvc_decode_intra_8x8(KmvcContext * ctx, uint8_t * src, int w, int h)
+static void kmvc_decode_intra_8x8(KmvcContext * ctx, const uint8_t * src, int w, int h)
{
BitBuf bb;
int res, val;
}
}
-static void kmvc_decode_inter_8x8(KmvcContext * ctx, uint8_t * src, int w, int h)
+static void kmvc_decode_inter_8x8(KmvcContext * ctx, const uint8_t * src, int w, int h)
{
BitBuf bb;
int res, val;
}
}
-static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint8_t * buf,
- int buf_size)
+static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, AVPacket *avpkt)
{
- KmvcContext *const ctx = (KmvcContext *) avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ KmvcContext *const ctx = avctx->priv_data;
uint8_t *out, *src;
int i;
int header;
return -1;
}
- header = buf[0];
- buf++;
+ header = *buf++;
+
+ /* blocksize 127 is really palette change event */
+ if (buf[0] == 127) {
+ buf += 3;
+ for (i = 0; i < 127; i++) {
+ ctx->pal[i + (header & 0x81)] = AV_RB24(buf);
+ buf += 4;
+ }
+ buf -= 127 * 4 + 3;
+ }
if (header & KMVC_KEYFRAME) {
ctx->pic.key_frame = 1;
ctx->pic.pict_type = FF_P_TYPE;
}
+ /* if palette has been changed, copy it from palctrl */
+ if (ctx->avctx->palctrl && ctx->avctx->palctrl->palette_changed) {
+ memcpy(ctx->pal, ctx->avctx->palctrl->palette, AVPALETTE_SIZE);
+ ctx->setpal = 1;
+ ctx->avctx->palctrl->palette_changed = 0;
+ }
+
if (header & KMVC_PALETTE) {
ctx->pic.palette_has_changed = 1;
// palette starts from index 1 and has 127 entries
for (i = 1; i <= ctx->palsize; i++) {
- ctx->pal[i] = (buf[0] << 16) | (buf[1] << 8) | buf[2];
- buf += 3;
+ ctx->pal[i] = bytestream_get_be24(&buf);
}
}
blocksize = *buf++;
- if (blocksize != 8) {
+ if (blocksize != 8 && blocksize != 127) {
av_log(avctx, AV_LOG_ERROR, "Block size = %i\n", blocksize);
return -1;
}
memset(ctx->cur, 0, 320 * 200);
switch (header & KMVC_METHOD) {
+ case 0:
+ case 1: // used in palette changed event
+ memcpy(ctx->cur, ctx->prev, 320 * 200);
+ break;
case 3:
kmvc_decode_intra_8x8(ctx, buf, avctx->width, avctx->height);
break;
/*
* Init kmvc decoder
*/
-static int decode_init(AVCodecContext * avctx)
+static av_cold int decode_init(AVCodecContext * avctx)
{
- KmvcContext *const c = (KmvcContext *) avctx->priv_data;
+ KmvcContext *const c = avctx->priv_data;
int i;
c->avctx = avctx;
- avctx->has_b_frames = 0;
-
- c->pic.data[0] = NULL;
if (avctx->width > 320 || avctx->height > 200) {
av_log(avctx, AV_LOG_ERROR, "KMVC supports frames <= 320x200\n");
av_log(NULL, 0, "Extradata missing, decoding may not work properly...\n");
c->palsize = 127;
} else {
- c->palsize = LE_16(avctx->extradata + 10);
+ c->palsize = AV_RL16(avctx->extradata + 10);
}
if (avctx->extradata_size == 1036) { // palette in extradata
uint8_t *src = avctx->extradata + 12;
- for (i = 0; i < c->palsize; i++) {
- c->pal[i] = LE_32(src);
+ for (i = 0; i < 256; i++) {
+ c->pal[i] = AV_RL32(src);
src += 4;
}
c->setpal = 1;
+ if (c->avctx->palctrl) {
+ c->avctx->palctrl->palette_changed = 0;
+ }
}
avctx->pix_fmt = PIX_FMT_PAL8;
/*
* Uninit kmvc decoder
*/
-static int decode_end(AVCodecContext * avctx)
+static av_cold int decode_end(AVCodecContext * avctx)
{
- KmvcContext *const c = (KmvcContext *) avctx->priv_data;
+ KmvcContext *const c = avctx->priv_data;
- if (c->frm0)
- av_free(c->frm0);
- if (c->frm1)
- av_free(c->frm1);
+ av_freep(&c->frm0);
+ av_freep(&c->frm1);
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
decode_init,
NULL,
decode_end,
- decode_frame
+ decode_frame,
+ CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Karl Morton's video codec"),
};