* IBM Ultimotion Video Decoder
* Copyright (C) 2004 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
- *
*/
/**
#include <string.h>
#include <unistd.h>
-#include "common.h"
#include "avcodec.h"
+#include "bytestream.h"
#include "ulti_cb.h"
const uint8_t *ulti_codebook;
} UltimotionDecodeContext;
-static int ulti_decode_init(AVCodecContext *avctx)
+static av_cold int ulti_decode_init(AVCodecContext *avctx)
{
UltimotionDecodeContext *s = avctx->priv_data;
s->height = avctx->height;
s->blocks = (s->width / 8) * (s->height / 8);
avctx->pix_fmt = PIX_FMT_YUV410P;
- avctx->has_b_frames = 0;
avctx->coded_frame = (AVFrame*) &s->frame;
s->ulti_codebook = ulti_codebook;
static int ulti_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
UltimotionDecodeContext *s=avctx->priv_data;
int modifier = 0;
case 2:
if (modifier) { // unpack four luma samples
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
+ tmp = bytestream_get_be24(&buf);
Y[0] = (tmp >> 18) & 0x3F;
Y[1] = (tmp >> 12) & 0x3F;
Y[3] = tmp & 0x3F;
angle = 16;
} else { // retrieve luma samples from codebook
- tmp = (*buf++) << 8;
- tmp += (*buf++);
+ tmp = bytestream_get_be16(&buf);
angle = (tmp >> 12) & 0xF;
tmp &= 0xFFF;
if (modifier) { // all 16 luma samples
uint8_t Luma[16];
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
+ tmp = bytestream_get_be24(&buf);
Luma[0] = (tmp >> 18) & 0x3F;
Luma[1] = (tmp >> 12) & 0x3F;
Luma[2] = (tmp >> 6) & 0x3F;
Luma[3] = tmp & 0x3F;
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
+ tmp = bytestream_get_be24(&buf);
Luma[4] = (tmp >> 18) & 0x3F;
Luma[5] = (tmp >> 12) & 0x3F;
Luma[6] = (tmp >> 6) & 0x3F;
Luma[7] = tmp & 0x3F;
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
+ tmp = bytestream_get_be24(&buf);
Luma[8] = (tmp >> 18) & 0x3F;
Luma[9] = (tmp >> 12) & 0x3F;
Luma[10] = (tmp >> 6) & 0x3F;
Luma[11] = tmp & 0x3F;
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
+ tmp = bytestream_get_be24(&buf);
Luma[12] = (tmp >> 18) & 0x3F;
Luma[13] = (tmp >> 12) & 0x3F;
Luma[14] = (tmp >> 6) & 0x3F;
return buf_size;
}
-static int ulti_decode_end(AVCodecContext *avctx)
+static av_cold int ulti_decode_end(AVCodecContext *avctx)
{
/* UltimotionDecodeContext *s = avctx->priv_data;*/
ulti_decode_end,
ulti_decode_frame,
CODEC_CAP_DR1,
- NULL
+ NULL,
+ .long_name = "IBM UltiMotion",
};