void MPV_common_init_altivec(MpegEncContext *s) { 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; s->dsp.idct_permutation_type = FF_TRANSPOSE_IDCT_PERM; } } // 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; } }