ppc: drop unused function dct_quantize_altivec()

This also allows dropping some PPC-specific ugliness from dsputil.[ch].

1 files changed, 0 insertions, 458 deletions

diff --git a/libavcodec/ppc/mpegvideo_altivec.c b/libavcodec/ppc/mpegvideo_altivec.c
index 0eb63bc947..42702fd84a 100644
--- a/libavcodec/ppc/mpegvideo_altivec.c
+++ b/libavcodec/ppc/mpegvideo_altivec.c
@@ -31,449 +31,6 @@
 #include "types_altivec.h"
 #include "dsputil_altivec.h"
 
-// Swaps two variables (used for altivec registers)
-#define SWAP(a,b) \
-do { \
-    __typeof__(a) swap_temp=a; \
-    a=b; \
-    b=swap_temp; \
-} while (0)
-
-// transposes a matrix consisting of four vectors with four elements each
-#define TRANSPOSE4(a,b,c,d) \
-do { \
-    __typeof__(a) _trans_ach = vec_mergeh(a, c); \
-    __typeof__(a) _trans_acl = vec_mergel(a, c); \
-    __typeof__(a) _trans_bdh = vec_mergeh(b, d); \
-    __typeof__(a) _trans_bdl = vec_mergel(b, d); \
-                                                 \
-    a = vec_mergeh(_trans_ach, _trans_bdh);      \
-    b = vec_mergel(_trans_ach, _trans_bdh);      \
-    c = vec_mergeh(_trans_acl, _trans_bdl);      \
-    d = vec_mergel(_trans_acl, _trans_bdl);      \
-} while (0)
-
-
-// Loads a four-byte value (int or float) from the target address
-// into every element in the target vector.  Only works if the
-// target address is four-byte aligned (which should be always).
-#define LOAD4(vec, address) \
-{ \
-    __typeof__(vec)* _load_addr = (__typeof__(vec)*)(address);  \
-    vector unsigned char _perm_vec = vec_lvsl(0,(address));     \
-    vec = vec_ld(0, _load_addr);                                \
-    vec = vec_perm(vec, vec, _perm_vec);                        \
-    vec = vec_splat(vec, 0);                                    \
-}
-
-
-#define FOUROF(a) {a,a,a,a}
-
-static int dct_quantize_altivec(MpegEncContext* s,
-                         DCTELEM* data, int n,
-                         int qscale, int* overflow)
-{
-    int lastNonZero;
-    vector float row0, row1, row2, row3, row4, row5, row6, row7;
-    vector float alt0, alt1, alt2, alt3, alt4, alt5, alt6, alt7;
-    const vector float zero = (const vector float)FOUROF(0.);
-    // used after quantize step
-    int oldBaseValue = 0;
-
-    // Load the data into the row/alt vectors
-    {
-        vector signed short data0, data1, data2, data3, data4, data5, data6, data7;
-
-        data0 = vec_ld(0, data);
-        data1 = vec_ld(16, data);
-        data2 = vec_ld(32, data);
-        data3 = vec_ld(48, data);
-        data4 = vec_ld(64, data);
-        data5 = vec_ld(80, data);
-        data6 = vec_ld(96, data);
-        data7 = vec_ld(112, data);
-
-        // Transpose the data before we start
-        TRANSPOSE8(data0, data1, data2, data3, data4, data5, data6, data7);
-
-        // load the data into floating point vectors.  We load
-        // the high half of each row into the main row vectors
-        // and the low half into the alt vectors.
-        row0 = vec_ctf(vec_unpackh(data0), 0);
-        alt0 = vec_ctf(vec_unpackl(data0), 0);
-        row1 = vec_ctf(vec_unpackh(data1), 0);
-        alt1 = vec_ctf(vec_unpackl(data1), 0);
-        row2 = vec_ctf(vec_unpackh(data2), 0);
-        alt2 = vec_ctf(vec_unpackl(data2), 0);
-        row3 = vec_ctf(vec_unpackh(data3), 0);
-        alt3 = vec_ctf(vec_unpackl(data3), 0);
-        row4 = vec_ctf(vec_unpackh(data4), 0);
-        alt4 = vec_ctf(vec_unpackl(data4), 0);
-        row5 = vec_ctf(vec_unpackh(data5), 0);
-        alt5 = vec_ctf(vec_unpackl(data5), 0);
-        row6 = vec_ctf(vec_unpackh(data6), 0);
-        alt6 = vec_ctf(vec_unpackl(data6), 0);
-        row7 = vec_ctf(vec_unpackh(data7), 0);
-        alt7 = vec_ctf(vec_unpackl(data7), 0);
-    }
-
-    // The following block could exist as a separate an altivec dct
-                // function.  However, if we put it inline, the DCT data can remain
-                // in the vector local variables, as floats, which we'll use during the
-                // quantize step...
-    {
-        const vector float vec_0_298631336 = (vector float)FOUROF(0.298631336f);
-        const vector float vec_0_390180644 = (vector float)FOUROF(-0.390180644f);
-        const vector float vec_0_541196100 = (vector float)FOUROF(0.541196100f);
-        const vector float vec_0_765366865 = (vector float)FOUROF(0.765366865f);
-        const vector float vec_0_899976223 = (vector float)FOUROF(-0.899976223f);
-        const vector float vec_1_175875602 = (vector float)FOUROF(1.175875602f);
-        const vector float vec_1_501321110 = (vector float)FOUROF(1.501321110f);
-        const vector float vec_1_847759065 = (vector float)FOUROF(-1.847759065f);
-        const vector float vec_1_961570560 = (vector float)FOUROF(-1.961570560f);
-        const vector float vec_2_053119869 = (vector float)FOUROF(2.053119869f);
-        const vector float vec_2_562915447 = (vector float)FOUROF(-2.562915447f);
-        const vector float vec_3_072711026 = (vector float)FOUROF(3.072711026f);
-
-
-        int whichPass, whichHalf;
-
-        for(whichPass = 1; whichPass<=2; whichPass++) {
-            for(whichHalf = 1; whichHalf<=2; whichHalf++) {
-                vector float tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-                vector float tmp10, tmp11, tmp12, tmp13;
-                vector float z1, z2, z3, z4, z5;
-
-                tmp0 = vec_add(row0, row7); // tmp0 = dataptr[0] + dataptr[7];
-                tmp7 = vec_sub(row0, row7); // tmp7 = dataptr[0] - dataptr[7];
-                tmp3 = vec_add(row3, row4); // tmp3 = dataptr[3] + dataptr[4];
-                tmp4 = vec_sub(row3, row4); // tmp4 = dataptr[3] - dataptr[4];
-                tmp1 = vec_add(row1, row6); // tmp1 = dataptr[1] + dataptr[6];
-                tmp6 = vec_sub(row1, row6); // tmp6 = dataptr[1] - dataptr[6];
-                tmp2 = vec_add(row2, row5); // tmp2 = dataptr[2] + dataptr[5];
-                tmp5 = vec_sub(row2, row5); // tmp5 = dataptr[2] - dataptr[5];
-
-                tmp10 = vec_add(tmp0, tmp3); // tmp10 = tmp0 + tmp3;
-                tmp13 = vec_sub(tmp0, tmp3); // tmp13 = tmp0 - tmp3;
-                tmp11 = vec_add(tmp1, tmp2); // tmp11 = tmp1 + tmp2;
-                tmp12 = vec_sub(tmp1, tmp2); // tmp12 = tmp1 - tmp2;
-
-
-                // dataptr[0] = (DCTELEM) ((tmp10 + tmp11) << PASS1_BITS);
-                row0 = vec_add(tmp10, tmp11);
-
-                // dataptr[4] = (DCTELEM) ((tmp10 - tmp11) << PASS1_BITS);
-                row4 = vec_sub(tmp10, tmp11);
-
-
-                // z1 = MULTIPLY(tmp12 + tmp13, FIX_0_541196100);
-                z1 = vec_madd(vec_add(tmp12, tmp13), vec_0_541196100, (vector float)zero);
-
-                // dataptr[2] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp13, FIX_0_765366865),
-                //                                CONST_BITS-PASS1_BITS);
-                row2 = vec_madd(tmp13, vec_0_765366865, z1);
-
-                // dataptr[6] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp12, - FIX_1_847759065),
-                //                                CONST_BITS-PASS1_BITS);
-                row6 = vec_madd(tmp12, vec_1_847759065, z1);
-
-                z1 = vec_add(tmp4, tmp7); // z1 = tmp4 + tmp7;
-                z2 = vec_add(tmp5, tmp6); // z2 = tmp5 + tmp6;
-                z3 = vec_add(tmp4, tmp6); // z3 = tmp4 + tmp6;
-                z4 = vec_add(tmp5, tmp7); // z4 = tmp5 + tmp7;
-
-                // z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
-                z5 = vec_madd(vec_add(z3, z4), vec_1_175875602, (vector float)zero);
-
-                // z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
-                z3 = vec_madd(z3, vec_1_961570560, z5);
-
-                // z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
-                z4 = vec_madd(z4, vec_0_390180644, z5);
-
-                // The following adds are rolled into the multiplies above
-                // z3 = vec_add(z3, z5);  // z3 += z5;
-                // z4 = vec_add(z4, z5);  // z4 += z5;
-
-                // z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
-                // Wow!  It's actually more efficient to roll this multiply
-                // into the adds below, even thought the multiply gets done twice!
-                // z2 = vec_madd(z2, vec_2_562915447, (vector float)zero);
-
-                // z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
-                // Same with this one...
-                // z1 = vec_madd(z1, vec_0_899976223, (vector float)zero);
-
-                // tmp4 = MULTIPLY(tmp4, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
-                // dataptr[7] = (DCTELEM) DESCALE(tmp4 + z1 + z3, CONST_BITS-PASS1_BITS);
-                row7 = vec_madd(tmp4, vec_0_298631336, vec_madd(z1, vec_0_899976223, z3));
-
-                // tmp5 = MULTIPLY(tmp5, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
-                // dataptr[5] = (DCTELEM) DESCALE(tmp5 + z2 + z4, CONST_BITS-PASS1_BITS);
-                row5 = vec_madd(tmp5, vec_2_053119869, vec_madd(z2, vec_2_562915447, z4));
-
-                // tmp6 = MULTIPLY(tmp6, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
-                // dataptr[3] = (DCTELEM) DESCALE(tmp6 + z2 + z3, CONST_BITS-PASS1_BITS);
-                row3 = vec_madd(tmp6, vec_3_072711026, vec_madd(z2, vec_2_562915447, z3));
-
-                // tmp7 = MULTIPLY(tmp7, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
-                // dataptr[1] = (DCTELEM) DESCALE(tmp7 + z1 + z4, CONST_BITS-PASS1_BITS);
-                row1 = vec_madd(z1, vec_0_899976223, vec_madd(tmp7, vec_1_501321110, z4));
-
-                // Swap the row values with the alts.  If this is the first half,
-                // this sets up the low values to be acted on in the second half.
-                // If this is the second half, it puts the high values back in
-                // the row values where they are expected to be when we're done.
-                SWAP(row0, alt0);
-                SWAP(row1, alt1);
-                SWAP(row2, alt2);
-                SWAP(row3, alt3);
-                SWAP(row4, alt4);
-                SWAP(row5, alt5);
-                SWAP(row6, alt6);
-                SWAP(row7, alt7);
-            }
-
-            if (whichPass == 1) {
-                // transpose the data for the second pass
-
-                // First, block transpose the upper right with lower left.
-                SWAP(row4, alt0);
-                SWAP(row5, alt1);
-                SWAP(row6, alt2);
-                SWAP(row7, alt3);
-
-                // Now, transpose each block of four
-                TRANSPOSE4(row0, row1, row2, row3);
-                TRANSPOSE4(row4, row5, row6, row7);
-                TRANSPOSE4(alt0, alt1, alt2, alt3);
-                TRANSPOSE4(alt4, alt5, alt6, alt7);
-            }
-        }
-    }
-
-    // perform the quantize step, using the floating point data
-    // still in the row/alt registers
-    {
-        const int* biasAddr;
-        const vector signed int* qmat;
-        vector float bias, negBias;
-
-        if (s->mb_intra) {
-            vector signed int baseVector;
-
-            // We must cache element 0 in the intra case
-            // (it needs special handling).
-            baseVector = vec_cts(vec_splat(row0, 0), 0);
-            vec_ste(baseVector, 0, &oldBaseValue);
-
-            qmat = (vector signed int*)s->q_intra_matrix[qscale];
-            biasAddr = &s->intra_quant_bias;
-        } else {
-            qmat = (vector signed int*)s->q_inter_matrix[qscale];
-            biasAddr = &s->inter_quant_bias;
-        }
-
-        // Load the bias vector (We add 0.5 to the bias so that we're
-                                // rounding when we convert to int, instead of flooring.)
-        {
-            vector signed int biasInt;
-            const vector float negOneFloat = (vector float)FOUROF(-1.0f);
-            LOAD4(biasInt, biasAddr);
-            bias = vec_ctf(biasInt, QUANT_BIAS_SHIFT);
-            negBias = vec_madd(bias, negOneFloat, zero);
-        }
-
-        {
-            vector float q0, q1, q2, q3, q4, q5, q6, q7;
-
-            q0 = vec_ctf(qmat[0], QMAT_SHIFT);
-            q1 = vec_ctf(qmat[2], QMAT_SHIFT);
-            q2 = vec_ctf(qmat[4], QMAT_SHIFT);
-            q3 = vec_ctf(qmat[6], QMAT_SHIFT);
-            q4 = vec_ctf(qmat[8], QMAT_SHIFT);
-            q5 = vec_ctf(qmat[10], QMAT_SHIFT);
-            q6 = vec_ctf(qmat[12], QMAT_SHIFT);
-            q7 = vec_ctf(qmat[14], QMAT_SHIFT);
-
-            row0 = vec_sel(vec_madd(row0, q0, negBias), vec_madd(row0, q0, bias),
-                    vec_cmpgt(row0, zero));
-            row1 = vec_sel(vec_madd(row1, q1, negBias), vec_madd(row1, q1, bias),
-                    vec_cmpgt(row1, zero));
-            row2 = vec_sel(vec_madd(row2, q2, negBias), vec_madd(row2, q2, bias),
-                    vec_cmpgt(row2, zero));
-            row3 = vec_sel(vec_madd(row3, q3, negBias), vec_madd(row3, q3, bias),
-                    vec_cmpgt(row3, zero));
-            row4 = vec_sel(vec_madd(row4, q4, negBias), vec_madd(row4, q4, bias),
-                    vec_cmpgt(row4, zero));
-            row5 = vec_sel(vec_madd(row5, q5, negBias), vec_madd(row5, q5, bias),
-                    vec_cmpgt(row5, zero));
-            row6 = vec_sel(vec_madd(row6, q6, negBias), vec_madd(row6, q6, bias),
-                    vec_cmpgt(row6, zero));
-            row7 = vec_sel(vec_madd(row7, q7, negBias), vec_madd(row7, q7, bias),
-                    vec_cmpgt(row7, zero));
-
-            q0 = vec_ctf(qmat[1], QMAT_SHIFT);
-            q1 = vec_ctf(qmat[3], QMAT_SHIFT);
-            q2 = vec_ctf(qmat[5], QMAT_SHIFT);
-            q3 = vec_ctf(qmat[7], QMAT_SHIFT);
-            q4 = vec_ctf(qmat[9], QMAT_SHIFT);
-            q5 = vec_ctf(qmat[11], QMAT_SHIFT);
-            q6 = vec_ctf(qmat[13], QMAT_SHIFT);
-            q7 = vec_ctf(qmat[15], QMAT_SHIFT);
-
-            alt0 = vec_sel(vec_madd(alt0, q0, negBias), vec_madd(alt0, q0, bias),
-                    vec_cmpgt(alt0, zero));
-            alt1 = vec_sel(vec_madd(alt1, q1, negBias), vec_madd(alt1, q1, bias),
-                    vec_cmpgt(alt1, zero));
-            alt2 = vec_sel(vec_madd(alt2, q2, negBias), vec_madd(alt2, q2, bias),
-                    vec_cmpgt(alt2, zero));
-            alt3 = vec_sel(vec_madd(alt3, q3, negBias), vec_madd(alt3, q3, bias),
-                    vec_cmpgt(alt3, zero));
-            alt4 = vec_sel(vec_madd(alt4, q4, negBias), vec_madd(alt4, q4, bias),
-                    vec_cmpgt(alt4, zero));
-            alt5 = vec_sel(vec_madd(alt5, q5, negBias), vec_madd(alt5, q5, bias),
-                    vec_cmpgt(alt5, zero));
-            alt6 = vec_sel(vec_madd(alt6, q6, negBias), vec_madd(alt6, q6, bias),
-                    vec_cmpgt(alt6, zero));
-            alt7 = vec_sel(vec_madd(alt7, q7, negBias), vec_madd(alt7, q7, bias),
-                    vec_cmpgt(alt7, zero));
-        }
-
-
-    }
-
-    // Store the data back into the original block
-    {
-        vector signed short data0, data1, data2, data3, data4, data5, data6, data7;
-
-        data0 = vec_pack(vec_cts(row0, 0), vec_cts(alt0, 0));
-        data1 = vec_pack(vec_cts(row1, 0), vec_cts(alt1, 0));
-        data2 = vec_pack(vec_cts(row2, 0), vec_cts(alt2, 0));
-        data3 = vec_pack(vec_cts(row3, 0), vec_cts(alt3, 0));
-        data4 = vec_pack(vec_cts(row4, 0), vec_cts(alt4, 0));
-        data5 = vec_pack(vec_cts(row5, 0), vec_cts(alt5, 0));
-        data6 = vec_pack(vec_cts(row6, 0), vec_cts(alt6, 0));
-        data7 = vec_pack(vec_cts(row7, 0), vec_cts(alt7, 0));
-
-        {
-            // Clamp for overflow
-            vector signed int max_q_int, min_q_int;
-            vector signed short max_q, min_q;
-
-            LOAD4(max_q_int, &s->max_qcoeff);
-            LOAD4(min_q_int, &s->min_qcoeff);
-
-            max_q = vec_pack(max_q_int, max_q_int);
-            min_q = vec_pack(min_q_int, min_q_int);
-
-            data0 = vec_max(vec_min(data0, max_q), min_q);
-            data1 = vec_max(vec_min(data1, max_q), min_q);
-            data2 = vec_max(vec_min(data2, max_q), min_q);
-            data4 = vec_max(vec_min(data4, max_q), min_q);
-            data5 = vec_max(vec_min(data5, max_q), min_q);
-            data6 = vec_max(vec_min(data6, max_q), min_q);
-            data7 = vec_max(vec_min(data7, max_q), min_q);
-        }
-
-        {
-        vector bool char zero_01, zero_23, zero_45, zero_67;
-        vector signed char scanIndexes_01, scanIndexes_23, scanIndexes_45, scanIndexes_67;
-        vector signed char negOne = vec_splat_s8(-1);
-        vector signed char* scanPtr =
-                (vector signed char*)(s->intra_scantable.inverse);
-        signed char lastNonZeroChar;
-
-        // Determine the largest non-zero index.
-        zero_01 = vec_pack(vec_cmpeq(data0, (vector signed short)zero),
-                vec_cmpeq(data1, (vector signed short)zero));
-        zero_23 = vec_pack(vec_cmpeq(data2, (vector signed short)zero),
-                vec_cmpeq(data3, (vector signed short)zero));
-        zero_45 = vec_pack(vec_cmpeq(data4, (vector signed short)zero),
-                vec_cmpeq(data5, (vector signed short)zero));
-        zero_67 = vec_pack(vec_cmpeq(data6, (vector signed short)zero),
-                vec_cmpeq(data7, (vector signed short)zero));
-
-        // 64 biggest values
-        scanIndexes_01 = vec_sel(scanPtr[0], negOne, zero_01);
-        scanIndexes_23 = vec_sel(scanPtr[1], negOne, zero_23);
-        scanIndexes_45 = vec_sel(scanPtr[2], negOne, zero_45);
-        scanIndexes_67 = vec_sel(scanPtr[3], negOne, zero_67);
-
-        // 32 largest values
-        scanIndexes_01 = vec_max(scanIndexes_01, scanIndexes_23);
-        scanIndexes_45 = vec_max(scanIndexes_45, scanIndexes_67);
-
-        // 16 largest values
-        scanIndexes_01 = vec_max(scanIndexes_01, scanIndexes_45);
-
-        // 8 largest values
-        scanIndexes_01 = vec_max(vec_mergeh(scanIndexes_01, negOne),
-                vec_mergel(scanIndexes_01, negOne));
-
-        // 4 largest values
-        scanIndexes_01 = vec_max(vec_mergeh(scanIndexes_01, negOne),
-                vec_mergel(scanIndexes_01, negOne));
-
-        // 2 largest values
-        scanIndexes_01 = vec_max(vec_mergeh(scanIndexes_01, negOne),
-                vec_mergel(scanIndexes_01, negOne));
-
-        // largest value
-        scanIndexes_01 = vec_max(vec_mergeh(scanIndexes_01, negOne),
-                vec_mergel(scanIndexes_01, negOne));
-
-        scanIndexes_01 = vec_splat(scanIndexes_01, 0);
-
-
-        vec_ste(scanIndexes_01, 0, &lastNonZeroChar);
-
-        lastNonZero = lastNonZeroChar;
-
-        // While the data is still in vectors we check for the transpose IDCT permute
-        // and handle it using the vector unit if we can.  This is the permute used
-        // by the altivec idct, so it is common when using the altivec dct.
-
-        if ((lastNonZero > 0) && (s->dsp.idct_permutation_type == FF_TRANSPOSE_IDCT_PERM)) {
-            TRANSPOSE8(data0, data1, data2, data3, data4, data5, data6, data7);
-        }
-
-        vec_st(data0, 0, data);
-        vec_st(data1, 16, data);
-        vec_st(data2, 32, data);
-        vec_st(data3, 48, data);
-        vec_st(data4, 64, data);
-        vec_st(data5, 80, data);
-        vec_st(data6, 96, data);
-        vec_st(data7, 112, data);
-        }
-    }
-
-    // special handling of block[0]
-    if (s->mb_intra) {
-        if (!s->h263_aic) {
-            if (n < 4)
-                oldBaseValue /= s->y_dc_scale;
-            else
-                oldBaseValue /= s->c_dc_scale;
-        }
-
-        // Divide by 8, rounding the result
-        data[0] = (oldBaseValue + 4) >> 3;
-    }
-
-    // We handled the transpose permutation above and we don't
-    // need to permute the "no" permutation case.
-    if ((lastNonZero > 0) &&
-        (s->dsp.idct_permutation_type != FF_TRANSPOSE_IDCT_PERM) &&
-        (s->dsp.idct_permutation_type != FF_NO_IDCT_PERM)) {
-        ff_block_permute(data, s->dsp.idct_permutation,
-                s->intra_scantable.scantable, lastNonZero);
-    }
-
-    return lastNonZero;
-}
-
 /* AltiVec version of dct_unquantize_h263
    this code assumes `block' is 16 bytes-aligned */
 static void dct_unquantize_h263_altivec(MpegEncContext *s,
@@ -558,21 +115,6 @@ void ff_MPV_common_init_altivec(MpegEncContext *s)
 {
     if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) return;
 
-    // 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)) {
         s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;