mpegvideo_ppc.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:3k
源码类别:
Windows CE
开发平台:
C/C++
- /*
- * Copyright (c) 2002 Dieter Shirley
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include "../dsputil.h"
- #include "../mpegvideo.h"
- #include <time.h>
- #ifdef HAVE_ALTIVEC
- #include "dsputil_altivec.h"
- #endif
- extern int dct_quantize_altivec(MpegEncContext *s,
- DCTELEM *block, int n,
- int qscale, int *overflow);
- extern void dct_unquantize_h263_altivec(MpegEncContext *s,
- DCTELEM *block, int n, int qscale);
- extern void idct_put_altivec(uint8_t *dest, int line_size, int16_t *block);
- extern void idct_add_altivec(uint8_t *dest, int line_size, int16_t *block);
- void MPV_common_init_ppc(MpegEncContext *s)
- {
- #ifdef HAVE_ALTIVEC
- if (has_altivec())
- {
- if (s->avctx->lowres==0)
- {
- if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
- (s->avctx->idct_algo == FF_IDCT_ALTIVEC))
- {
- s->dsp.idct_put = idct_put_altivec;
- s->dsp.idct_add = idct_add_altivec;
- #ifndef ALTIVEC_USE_REFERENCE_C_CODE
- s->dsp.idct_permutation_type = FF_TRANSPOSE_IDCT_PERM;
- #else /* ALTIVEC_USE_REFERENCE_C_CODE */
- s->dsp.idct_permutation_type = FF_NO_IDCT_PERM;
- #endif /* ALTIVEC_USE_REFERENCE_C_CODE */
- }
- }
- // Test to make sure that the dct required alignments are met.
- if ((((long)(s->q_intra_matrix) & 0x0f) != 0) ||
- (((long)(s->q_inter_matrix) & 0x0f) != 0))
- {
- av_log(s->avctx, AV_LOG_INFO, "Internal Error: q-matrix blocks must be 16-byte aligned "
- "to use Altivec DCT. Reverting to non-altivec version.n");
- return;
- }
- if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
- {
- av_log(s->avctx, AV_LOG_INFO, "Internal Error: scan table blocks must be 16-byte aligned "
- "to use Altivec DCT. Reverting to non-altivec version.n");
- return;
- }
- if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
- (s->avctx->dct_algo == FF_DCT_ALTIVEC))
- {
- #if 0 /* seems to cause trouble under some circumstances */
- s->dct_quantize = dct_quantize_altivec;
- #endif
- s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;
- s->dct_unquantize_h263_inter = dct_unquantize_h263_altivec;
- }
- } else
- #endif
- {
- /* Non-AltiVec PPC optimisations here */
- }
- }