* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
#include "avcodec.h"
+#include "rle.h"
-/**
- * Count up to 127 consecutive pixels which are either all the same or
- * all differ from the previous and next pixels.
- * @param start Pointer to the first pixel
- * @param len Maximum number of pixels
- * @param bpp Bytes per pixel
- * @param same 1 if searching for identical pixel values. 0 for differing
- * @return Number of matching consecutive pixels found
- */
-static int count_pixels(uint8_t *start, int len, int bpp, int same)
-{
- uint8_t *pos;
- int count = 1;
-
- for(pos = start + bpp; count < FFMIN(128, len); pos += bpp, count ++) {
- if(same != !memcmp(pos-bpp, pos, bpp)) {
- if(!same) {
- /* if bpp == 1, then 0 1 1 0 is more efficiently encoded as a single
- * raw block of pixels. for larger bpp, RLE is as good or better */
- if(bpp == 1 && count + 1 < FFMIN(128, len) && *pos != *(pos+1))
- continue;
-
- /* if RLE can encode the next block better than as a raw block,
- * back up and leave _all_ the identical pixels for RLE */
- count --;
- }
- break;
- }
- }
-
- return count;
-}
+typedef struct TargaContext {
+ AVFrame picture;
+} TargaContext;
/**
* RLE compress the image, with maximum size of out_size
static int targa_encode_rle(uint8_t *outbuf, int out_size, AVFrame *pic,
int bpp, int w, int h)
{
- int count, x, y;
- uint8_t *ptr, *line, *out;
+ int y,ret;
+ uint8_t *out;
out = outbuf;
- line = pic->data[0];
for(y = 0; y < h; y ++) {
- ptr = line;
-
- for(x = 0; x < w; x += count) {
- /* see if we can encode the next set of pixels with RLE */
- if((count = count_pixels(ptr, w-x, bpp, 1)) > 1) {
- if(out + bpp + 1 > outbuf + out_size) return -1;
- *out++ = 0x80 | (count - 1);
- memcpy(out, ptr, bpp);
- out += bpp;
- } else {
- /* fall back on uncompressed */
- count = count_pixels(ptr, w-x, bpp, 0);
- *out++ = count - 1;
-
- if(out + bpp*count > outbuf + out_size) return -1;
- memcpy(out, ptr, bpp * count);
- out += bpp * count;
- }
- ptr += count * bpp;
+ ret = ff_rle_encode(out, out_size, pic->data[0] + pic->linesize[0] * y, bpp, w, 0x7f, 0, -1, 0);
+ if(ret == -1){
+ return -1;
}
-
- line += pic->linesize[0];
+ out+= ret;
+ out_size -= ret;
}
return out - outbuf;
p->key_frame= 1;
/* zero out the header and only set applicable fields */
- memset(outbuf, 0, 11);
+ memset(outbuf, 0, 12);
AV_WL16(outbuf+12, avctx->width);
AV_WL16(outbuf+14, avctx->height);
outbuf[17] = 0x20; /* origin is top-left. no alpha */
return out + 26 - outbuf;
}
-static int targa_encode_init(AVCodecContext *avctx)
+static av_cold int targa_encode_init(AVCodecContext *avctx)
{
+ TargaContext *s = avctx->priv_data;
+
+ avcodec_get_frame_defaults(&s->picture);
+ s->picture.key_frame= 1;
+ avctx->coded_frame= &s->picture;
+
return 0;
}
.name = "targa",
.type = CODEC_TYPE_VIDEO,
.id = CODEC_ID_TARGA,
- .priv_data_size = 0,
+ .priv_data_size = sizeof(TargaContext),
.init = targa_encode_init,
.encode = targa_encode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB555, PIX_FMT_GRAY8, -1},
+ .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB555, PIX_FMT_GRAY8, PIX_FMT_NONE},
+ .long_name= NULL_IF_CONFIG_SMALL("Truevision Targa image"),
};