Adds 8-, 9- and 10-bit versions of some of the functions used by the h264 decoder.

This patch lets e.g. dsputil_init chose dsp functions with respect to
the bit depth to decode. The naming scheme of bit depth dependent
functions is <base name>_<bit depth>[_<prefix>] (i.e. the old
clear_blocks_c is now named clear_blocks_8_c).

Note: Some of the functions for high bit depth is not dependent on the
bit depth, but only on the pixel size. This leaves some room for
optimizing binary size.

Preparatory patch for high bit depth h264 decoding support.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/libavcodec/ppc/dsputil_altivec.c b/libavcodec/ppc/dsputil_altivec.c
index 9111d036a5..adce61b277 100644
--- a/libavcodec/ppc/dsputil_altivec.c
+++ b/libavcodec/ppc/dsputil_altivec.c
@@ -1384,6 +1384,8 @@ static void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int l
 
 void dsputil_init_altivec(DSPContext* c, AVCodecContext *avctx)
 {
+    const int high_bit_depth = avctx->codec_id == CODEC_ID_H264 && avctx->bits_per_raw_sample > 8;
+
     c->pix_abs[0][1] = sad16_x2_altivec;
     c->pix_abs[0][2] = sad16_y2_altivec;
     c->pix_abs[0][3] = sad16_xy2_altivec;
@@ -1397,8 +1399,10 @@ void dsputil_init_altivec(DSPContext* c, AVCodecContext *avctx)
     c->pix_sum = pix_sum_altivec;
     c->diff_pixels = diff_pixels_altivec;
     c->get_pixels = get_pixels_altivec;
+    if (!high_bit_depth)
     c->clear_block = clear_block_altivec;
     c->add_bytes= add_bytes_altivec;
+    if (!high_bit_depth) {
     c->put_pixels_tab[0][0] = put_pixels16_altivec;
     /* the two functions do the same thing, so use the same code */
     c->put_no_rnd_pixels_tab[0][0] = put_pixels16_altivec;
@@ -1409,6 +1413,7 @@ void dsputil_init_altivec(DSPContext* c, AVCodecContext *avctx)
     c->put_no_rnd_pixels_tab[1][3] = put_no_rnd_pixels8_xy2_altivec;
     c->put_pixels_tab[0][3] = put_pixels16_xy2_altivec;
     c->put_no_rnd_pixels_tab[0][3] = put_no_rnd_pixels16_xy2_altivec;
+    }
 
     c->hadamard8_diff[0] = hadamard8_diff16_altivec;
     c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;