* Microsoft Video-1 Decoder
* Copyright (C) 2003 the ffmpeg project
*
- * 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
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * 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 "dsputil.h"
#define PALETTE_COUNT 256
-#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
#define CHECK_STREAM_PTR(n) \
if ((stream_ptr + n) > s->size ) { \
av_log(s->avctx, AV_LOG_ERROR, " MS Video-1 warning: stream_ptr out of bounds (%d >= %d)\n", \
typedef struct Msvideo1Context {
AVCodecContext *avctx;
- DSPContext dsp;
AVFrame frame;
- unsigned char *buf;
+ const unsigned char *buf;
int size;
int mode_8bit; /* if it's not 8-bit, it's 16-bit */
} Msvideo1Context;
-static int msvideo1_decode_init(AVCodecContext *avctx)
+static av_cold int msvideo1_decode_init(AVCodecContext *avctx)
{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+ Msvideo1Context *s = avctx->priv_data;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_RGB555;
}
- avctx->has_b_frames = 0;
- dsputil_init(&s->dsp, avctx);
-
s->frame.data[0] = NULL;
return 0;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
- pixels[pixel_ptr++] =
- colors[((pixel_y & 0x2) << 1) +
+ pixels[pixel_ptr++] =
+ colors[((pixel_y & 0x2) << 1) +
(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
pixel_ptr -= row_dec;
}
flags = (byte_b << 8) | byte_a;
CHECK_STREAM_PTR(4);
- colors[0] = LE_16(&s->buf[stream_ptr]);
+ colors[0] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[1] = LE_16(&s->buf[stream_ptr]);
+ colors[1] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
if (colors[0] & 0x8000) {
/* 8-color encoding */
CHECK_STREAM_PTR(12);
- colors[2] = LE_16(&s->buf[stream_ptr]);
+ colors[2] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[3] = LE_16(&s->buf[stream_ptr]);
+ colors[3] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[4] = LE_16(&s->buf[stream_ptr]);
+ colors[4] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[5] = LE_16(&s->buf[stream_ptr]);
+ colors[5] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[6] = LE_16(&s->buf[stream_ptr]);
+ colors[6] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[7] = LE_16(&s->buf[stream_ptr]);
+ colors[7] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
- pixels[pixel_ptr++] =
- colors[((pixel_y & 0x2) << 1) +
+ pixels[pixel_ptr++] =
+ colors[((pixel_y & 0x2) << 1) +
(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
pixel_ptr -= row_dec;
}
static int msvideo1_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
-
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
+ Msvideo1Context *s = avctx->priv_data;
s->buf = buf;
s->size = buf_size;
return buf_size;
}
-static int msvideo1_decode_end(AVCodecContext *avctx)
+static av_cold int msvideo1_decode_end(AVCodecContext *avctx)
{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+ Msvideo1Context *s = avctx->priv_data;
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
msvideo1_decode_end,
msvideo1_decode_frame,
CODEC_CAP_DR1,
+ .long_name= NULL_IF_CONFIG_SMALL("Microsoft Video 1"),
};