generic-library/vpx
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Use endian-neutral bitstream packing/unpacking

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Eliminate unnecessary checks on target endianness and associated
macros.

Change-Id: I1d4e6a9dcee9bfc8940c8196838d31ed31b0e4aa
This commit is contained in:
John Koleszar 2011-02-17 06:47:39 -05:00
parent c351aa7f1b
commit 562f1470ce
2 changed files with 14 additions and 33 deletions
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30
vp8/encoder/bitstream.c
View File

@ -58,16 +58,6 @@ extern unsigned int active_section;
int count_mb_seg[4] = { 0, 0, 0, 0 };
#endif
#if CONFIG_BIG_ENDIAN
# define make_endian_16(a) \
(((unsigned int)(a & 0xff)) << 8) | (((unsigned int)(a & 0xff00)) >> 8)
# define make_endian_32(a) \
(((unsigned int)(a & 0xff)) << 24) | (((unsigned int)(a & 0xff00)) << 8) | \
(((unsigned int)(a & 0xff0000)) >> 8) | (((unsigned int)(a & 0xff000000)) >> 24)
#else
# define make_endian_16(a) a
# define make_endian_32(a) a
#endif
static void update_mode(
vp8_writer *const w,
@ -1392,13 +1382,20 @@ void vp8_pack_bitstream(VP8_COMP *cpi, unsigned char *dest, unsigned long *size)
// every keyframe send startcode, width, height, scale factor, clamp and color type
if (oh.type == KEY_FRAME)
{
int v;
// Start / synch code
cx_data[0] = 0x9D;
cx_data[1] = 0x01;
cx_data[2] = 0x2a;
*((unsigned short *)(cx_data + 3)) = make_endian_16((pc->horiz_scale << 14) | pc->Width);
*((unsigned short *)(cx_data + 5)) = make_endian_16((pc->vert_scale << 14) | pc->Height);
v = (pc->horiz_scale << 14) | pc->Width;
cx_data[3] = v;
cx_data[4] = v >> 8;
v = (pc->vert_scale << 14) | pc->Height;
cx_data[5] = v;
cx_data[6] = v >> 8;
extra_bytes_packed = 7;
cx_data += extra_bytes_packed ;
@ -1666,19 +1663,16 @@ void vp8_pack_bitstream(VP8_COMP *cpi, unsigned char *dest, unsigned long *size)
*size = cpi->bc2.pos + cpi->bc.pos + VP8_HEADER_SIZE + extra_bytes_packed;
}
#if CONFIG_BIG_ENDIAN
{
int v = (oh.first_partition_length_in_bytes << 5) |
(oh.show_frame << 4) |
(oh.version << 1) |
oh.type;
v = make_endian_32(v);
vpx_memcpy(dest, &v, 3);
dest[0] = v;
dest[1] = v >> 8;
dest[2] = v >> 16;
}
#else
vpx_memcpy(dest, &oh, 3);
#endif
}
#ifdef ENTROPY_STATS

17
vp8/vp8_dx_iface.c
View File

@ -20,19 +20,6 @@
#define VP8_CAP_POSTPROC (CONFIG_POSTPROC ? VPX_CODEC_CAP_POSTPROC : 0)
#if CONFIG_BIG_ENDIAN
# define swap4(d)\
((d&0x000000ff)<<24) | \
((d&0x0000ff00)<<8) | \
((d&0x00ff0000)>>8) | \
((d&0xff000000)>>24)
# define swap2(d)\
((d&0x000000ff)<<8) | \
((d&0x0000ff00)>>8)
#else
# define swap4(d) d
# define swap2(d) d
#endif
typedef vpx_codec_stream_info_t vp8_stream_info_t;
/* Structures for handling memory allocations */
@ -283,8 +270,8 @@ static vpx_codec_err_t vp8_peek_si(const uint8_t *data,
if (c[0] != 0x9d || c[1] != 0x01 || c[2] != 0x2a)
res = VPX_CODEC_UNSUP_BITSTREAM;
si->w = swap2(*(const unsigned short *)(c + 3)) & 0x3fff;
si->h = swap2(*(const unsigned short *)(c + 5)) & 0x3fff;
si->w = (c[3] | (c[4] << 8)) & 0x3fff;
si->h = (c[5] | (c[6] << 8)) & 0x3fff;
/*printf("w=%d, h=%d\n", si->w, si->h);*/
if (!(si->h | si->w))