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Add possibility to crop screens inside of encoded frames. 

Originally committed as revision 25346 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Tobias Bindhammer 2010-10-05 12:14:23 +00:00
parent 93ee7f9c41
commit 90a3ffe276
1 changed files with 19 additions and 4 deletions
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23
libavcodec/a64multienc.c
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@ -33,6 +33,7 @@
#define DITHERSTEPS 8
#define CHARSET_CHARS 256
#define INTERLACED 1
#define CROP_SCREENS 1
/* gray gradient */
static const int mc_colors[5]={0x0,0xb,0xc,0xf,0x1};
@ -245,7 +246,9 @@ static int a64multi_encode_frame(AVCodecContext *avctx, unsigned char *buf,
AVFrame *const p = (AVFrame *) & c->picture;
int frame;
int a;
int x, y;
int b_height;
int b_width;
int req_size;
int num_frames = c->mc_lifetime;
@ -257,9 +260,19 @@ static int a64multi_encode_frame(AVCodecContext *avctx, unsigned char *buf,
int *best_cb = c->mc_best_cb;
int charset_size = 0x800 * (INTERLACED + 1);
int screen_size = 0x400;
int screen_size;
int colram_size = 0x100 * c->mc_use_5col;
if(CROP_SCREENS) {
b_height = FFMIN(avctx->height,C64YRES) >> 3;
b_width = FFMIN(avctx->width ,C64XRES) >> 3;
screen_size = b_width * b_height;
} else {
b_height = C64YRES >> 3;
b_width = C64XRES >> 3;
screen_size = 0x400;
}
/* no data, means end encoding asap */
if (!data) {
/* all done, end encoding */
@ -312,8 +325,10 @@ static int a64multi_encode_frame(AVCodecContext *avctx, unsigned char *buf,
/* write x frames to buf */
for (frame = 0; frame < c->mc_lifetime; frame++) {
/* copy charmap to buf. buf is uchar*, charmap is int*, so no memcpy here, sorry */
for (a = 0; a < 1000; a++) {
buf[a] = charmap[a];
for (y = 0; y < b_height; y++) {
for (x = 0; x < b_width; x++) {
buf[y * b_width + x] = charmap[y * b_width + x];
}
}
/* advance pointers */
buf += screen_size;