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avcodec/xbmenc: substitute end instead of recalculating end
Minor speed increase, end is calculated before entering parse_str_int(), so let's take advantage of the value and avoid recalculating twice more. This also allows parse_str_int() to work with file size larger than int. Signed-off-by: Joe Da Silva <digital@joescat.com>
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@ -37,10 +37,8 @@ static int convert(uint8_t x)
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return x;
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}
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static int parse_str_int(const uint8_t *p, int len, const uint8_t *key)
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static int parse_str_int(const uint8_t *p, const uint8_t *end, const uint8_t *key)
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{
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const uint8_t *end = p + len;
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for(; p<end - strlen(key); p++) {
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if (!memcmp(p, key, strlen(key)))
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break;
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@ -72,8 +70,8 @@ static int xbm_decode_frame(AVCodecContext *avctx, void *data,
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avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
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end = avpkt->data + avpkt->size;
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width = parse_str_int(avpkt->data, avpkt->size, "_width");
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height = parse_str_int(avpkt->data, avpkt->size, "_height");
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width = parse_str_int(avpkt->data, end, "_width");
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height = parse_str_int(avpkt->data, end, "_height");
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if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
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return ret;
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