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avcodec/qtrle : improve 24bbp decoding speed 

benchmark on x86_64 :
mainly raw data : 20 -> 39 fps
mainly rle data : 97 -> 119fps
This commit is contained in:
Martin Vignali 2019-02-26 10:38:25 +01:00
parent 3278ea67c8
commit 88d0be1c0e
1 changed files with 19 additions and 12 deletions
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31
libavcodec/qtrle.c
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@ -297,10 +297,11 @@ static void qtrle_decode_16bpp(QtrleContext *s, int row_ptr, int lines_to_change
static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change)
{
int rle_code;
int rle_code, rle_code_half;
int pixel_ptr;
int row_inc = s->frame->linesize[0];
uint8_t r, g, b;
uint8_t b;
uint16_t rg;
uint8_t *rgb = s->frame->data[0];
int pixel_limit = s->frame->linesize[0] * s->avctx->height;
@ -318,25 +319,31 @@ static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change
} else if (rle_code < 0) {
/* decode the run length code */
rle_code = -rle_code;
r = bytestream2_get_byte(&s->g);
g = bytestream2_get_byte(&s->g);
rg = bytestream2_get_ne16(&s->g);
b = bytestream2_get_byte(&s->g);
CHECK_PIXEL_PTR(rle_code * 3);
while (rle_code--) {
rgb[pixel_ptr++] = r;
rgb[pixel_ptr++] = g;
rgb[pixel_ptr++] = b;
AV_WN16A(rgb + pixel_ptr, rg);
rgb[pixel_ptr + 2] = b;
pixel_ptr += 3;
}
} else {
CHECK_PIXEL_PTR(rle_code * 3);
/* copy pixels directly to output */
while (rle_code--) {
rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
rle_code_half = rle_code / 2;
while (rle_code_half--) { /* copy 2 raw rgb value at the same time */
AV_WN32A(rgb + pixel_ptr, bytestream2_get_ne32(&s->g)); /* rgbr */
AV_WN16A(rgb + pixel_ptr + 4, bytestream2_get_ne16(&s->g)); /* rgbr */
pixel_ptr += 6;
}
if (rle_code % 2 != 0){ /* not even raw value */
AV_WN16A(rgb + pixel_ptr, bytestream2_get_ne16(&s->g));
rgb[pixel_ptr + 2] = bytestream2_get_byte(&s->g);
pixel_ptr += 3;
}
}
}