#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
avctx->pix_fmt = PIX_FMT_PAL8;
- if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
- return -1;
-
s->buffer1_size = avctx->width * avctx->height;
s->buffer1 = av_malloc(s->buffer1_size);
+ if (!s->buffer1)
+ return -1;
s->buffer2_size = avctx->width * avctx->height;
s->buffer2 = av_malloc(s->buffer2_size + 130);
- if (!s->buffer1 || !s->buffer2)
+ if (!s->buffer2) {
+ av_freep(&s->buffer1);
return -1;
+ }
return 0;
}
av_memcpy_backptr(dest, back, size2);
dest += size2;
} else {
- size = ((opcode & 0x1f) << 2) + 4;
-
- if (size > 0x70)
- break;
+ int finish = opcode >= 0xfc;
+ size = finish ? opcode & 3 : ((opcode & 0x1f) << 2) + 4;
memcpy(dest, src, size); dest += size; src += size;
+ if (finish)
+ return;
}
}
-
- size = opcode & 3;
- memcpy(dest, src, size); dest += size; src += size;
}
static inline void xan_wc3_output_pixel_run(XanContext *s,
line_inc = stride - width;
index = y * stride + x;
current_x = x;
- while((pixel_count--) && (index < s->frame_size)) {
-
- /* don't do a memcpy() here; keyframes generally copy an entire
- * frame of data and the stride needs to be accounted for */
- palette_plane[index++] = *pixel_buffer++;
+ while(pixel_count && (index < s->frame_size)) {
+ int count = FFMIN(pixel_count, width - current_x);
+ memcpy(palette_plane + index, pixel_buffer, count);
+ pixel_count -= count;
+ index += count;
+ pixel_buffer += count;
+ current_x += count;
- current_x++;
if (current_x >= width) {
index += line_inc;
current_x = 0;
curframe_x = x;
prevframe_index = (y + motion_y) * stride + x + motion_x;
prevframe_x = x + motion_x;
- while((pixel_count--) && (curframe_index < s->frame_size)) {
+ while(pixel_count && (curframe_index < s->frame_size)) {
+ int count = FFMIN3(pixel_count, width - curframe_x, width - prevframe_x);
- palette_plane[curframe_index++] =
- prev_palette_plane[prevframe_index++];
+ memcpy(palette_plane + curframe_index, prev_palette_plane + prevframe_index, count);
+ pixel_count -= count;
+ curframe_index += count;
+ prevframe_index += count;
+ curframe_x += count;
+ prevframe_x += count;
- curframe_x++;
if (curframe_x >= width) {
curframe_index += line_inc;
curframe_x = 0;
}
- prevframe_x++;
if (prevframe_x >= width) {
prevframe_index += line_inc;
prevframe_x = 0;
palette_control->palette_changed = 0;
memcpy(s->current_frame.data[1], palette_control->palette,
- AVPALETTE_SIZE);
+ AVPALETTE_SIZE);
s->current_frame.palette_has_changed = 1;
s->buf = buf;
if (s->current_frame.data[0])
avctx->release_buffer(avctx, &s->current_frame);
- av_free(s->buffer1);
- av_free(s->buffer2);
+ av_freep(&s->buffer1);
+ av_freep(&s->buffer2);
return 0;
}
xan_decode_end,
xan_decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Wing Commander IV / Xxan"),
};
*/