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Diffstat (limited to 'libavcodec/i386/mpegvideo.c')
-rw-r--r--libavcodec/i386/mpegvideo.c239
1 files changed, 239 insertions, 0 deletions
diff --git a/libavcodec/i386/mpegvideo.c b/libavcodec/i386/mpegvideo.c
new file mode 100644
index 0000000000..d9e5e5c114
--- /dev/null
+++ b/libavcodec/i386/mpegvideo.c
@@ -0,0 +1,239 @@
+/*
+ * The simplest mpeg encoder (well, it was the simplest!)
+ * Copyright (c) 2000,2001 Gerard Lantau.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Optimized for ia32 cpus by Nick Kurshev <nickols_k@mail.ru>
+ */
+
+void MPV_frame_start(MpegEncContext *s)
+{
+ if (s->pict_type == B_TYPE) {
+ __asm __volatile(
+ "movl (%1), %%eax\n\t"
+ "movl 4(%1), %%edx\n\t"
+ "movl 8(%1), %%ecx\n\t"
+ "movl %%eax, (%0)\n\t"
+ "movl %%edx, 4(%0)\n\t"
+ "movl %%ecx, 8(%0)\n\t"
+ :
+ :"r"(s->current_picture), "r"(s->aux_picture)
+ :"eax","edx","ecx","memory");
+ } else {
+ /* swap next and last */
+ __asm __volatile(
+ "movl (%1), %%eax\n\t"
+ "movl 4(%1), %%edx\n\t"
+ "movl 8(%1), %%ecx\n\t"
+ "xchgl (%0), %%eax\n\t"
+ "xchgl 4(%0), %%edx\n\t"
+ "xchgl 8(%0), %%ecx\n\t"
+ "movl %%eax, (%1)\n\t"
+ "movl %%edx, 4(%1)\n\t"
+ "movl %%ecx, 8(%1)\n\t"
+ "movl %%eax, (%2)\n\t"
+ "movl %%edx, 4(%2)\n\t"
+ "movl %%ecx, 8(%2)\n\t"
+ :
+ :"r"(s->last_picture), "r"(s->next_picture), "r"(s->current_picture)
+ :"eax","edx","ecx","memory");
+ }
+}
+
+static void dct_unquantize(MpegEncContext *s, DCTELEM *block, int n, int qscale);
+
+#ifdef HAVE_MMX
+static const unsigned long long int mm_wabs __attribute__ ((aligned(8))) = 0xffffffffffffffffULL;
+static const unsigned long long int mm_wone __attribute__ ((aligned(8))) = 0x0001000100010001ULL;
+
+/*
+ NK:
+ Note: looking at PARANOID:
+ "enable all paranoid tests for rounding, overflows, etc..."
+
+#ifdef PARANOID
+ if (level < -2048 || level > 2047)
+ fprintf(stderr, "unquant error %d %d\n", i, level);
+#endif
+ We can suppose that result of two multiplications can't be greate of 0xFFFF
+ i.e. is 16-bit, so we use here only PMULLW instruction and can avoid
+ a complex multiplication.
+=====================================================
+ Full formula for multiplication of 2 integer numbers
+ which are represent as high:low words:
+ input: value1 = high1:low1
+ value2 = high2:low2
+ output: value3 = value1*value2
+ value3=high3:low3 (on overflow: modulus 2^32 wrap-around)
+ this mean that for 0x123456 * 0x123456 correct result is 0x766cb0ce4
+ but this algorithm will compute only 0x66cb0ce4
+ this limited by 16-bit size of operands
+ ---------------------------------
+ tlow1 = high1*low2
+ tlow2 = high2*low1
+ tlow1 = tlow1 + tlow2
+ high3:low3 = low1*low2
+ high3 += tlow1
+*/
+#ifdef BIN_PORTABILITY
+static void dct_unquantize_mmx
+#else
+#define HAVE_DCT_UNQUANTIZE 1
+static void dct_unquantize
+#endif
+(MpegEncContext *s,DCTELEM *block, int n, int qscale)
+{
+ int i, level;
+ const UINT16 *quant_matrix;
+ if (s->mb_intra) {
+ if (n < 4)
+ block[0] = block[0] * s->y_dc_scale;
+ else
+ block[0] = block[0] * s->c_dc_scale;
+ if (s->out_format == FMT_H263) {
+ i = 1;
+ goto unquant_even;
+ }
+ /* XXX: only mpeg1 */
+ quant_matrix = s->intra_matrix;
+ i=1;
+ /* Align on 4 elements boundary */
+ while(i&3)
+ {
+ level = block[i];
+ if (level) {
+ if (level < 0) level = -level;
+ level = (int)(level * qscale * quant_matrix[i]) >> 3;
+ level = (level - 1) | 1;
+ if (block[i] < 0) level = -level;
+ block[i] = level;
+ }
+ i++;
+ }
+ __asm __volatile(
+ "movd %0, %%mm6\n\t" /* mm6 = qscale | 0 */
+ "punpckldq %%mm6, %%mm6\n\t" /* mm6 = qscale | qscale */
+ "movq %2, %%mm4\n\t"
+ "movq %%mm6, %%mm7\n\t"
+ "movq %1, %%mm5\n\t"
+ "packssdw %%mm6, %%mm7\n\t" /* mm7 = qscale | qscale | qscale | qscale */
+ "pxor %%mm6, %%mm6\n\t"
+ ::"g"(qscale),"m"(mm_wone),"m"(mm_wabs):"memory");
+ for(;i<64;i+=4) {
+ __asm __volatile(
+ "movq %1, %%mm0\n\t"
+ "movq %%mm7, %%mm1\n\t"
+ "movq %%mm0, %%mm2\n\t"
+ "movq %%mm0, %%mm3\n\t"
+ "pcmpgtw %%mm6, %%mm2\n\t"
+ "pmullw %2, %%mm1\n\t"
+ "pandn %%mm4, %%mm2\n\t"
+ "por %%mm5, %%mm2\n\t"
+ "pmullw %%mm2, %%mm0\n\t" /* mm0 = abs(block[i]). */
+
+ "pcmpeqw %%mm6, %%mm3\n\t"
+ "pmullw %%mm0, %%mm1\n\t"
+ "psraw $3, %%mm1\n\t"
+ "psubw %%mm5, %%mm1\n\t" /* block[i] --; */
+ "pandn %%mm4, %%mm3\n\t" /* fake of pcmpneqw : mm0 != 0 then mm1 = -1 */
+ "por %%mm5, %%mm1\n\t" /* block[i] |= 1 */
+ "pmullw %%mm2, %%mm1\n\t" /* change signs again */
+
+ "pand %%mm3, %%mm1\n\t" /* nullify if was zero */
+ "movq %%mm1, %0"
+ :"=m"(block[i])
+ :"m"(block[i]), "m"(quant_matrix[i])
+ :"memory");
+ }
+ } else {
+ i = 0;
+ unquant_even:
+ quant_matrix = s->non_intra_matrix;
+ /* Align on 4 elements boundary */
+ while(i&3)
+ {
+ level = block[i];
+ if (level) {
+ if (level < 0) level = -level;
+ level = (((level << 1) + 1) * qscale *
+ ((int) quant_matrix[i])) >> 4;
+ level = (level - 1) | 1;
+ if(block[i] < 0) level = -level;
+ block[i] = level;
+ }
+ i++;
+ }
+ __asm __volatile(
+ "movd %0, %%mm6\n\t" /* mm6 = qscale | 0 */
+ "punpckldq %%mm6, %%mm6\n\t" /* mm6 = qscale | qscale */
+ "movq %2, %%mm4\n\t"
+ "movq %%mm6, %%mm7\n\t"
+ "movq %1, %%mm5\n\t"
+ "packssdw %%mm6, %%mm7\n\t" /* mm7 = qscale | qscale | qscale | qscale */
+ "pxor %%mm6, %%mm6\n\t"
+ ::"g"(qscale),"m"(mm_wone),"m"(mm_wabs):"memory");
+ for(;i<64;i+=4) {
+ __asm __volatile(
+ "movq %1, %%mm0\n\t"
+ "movq %%mm7, %%mm1\n\t"
+ "movq %%mm0, %%mm2\n\t"
+ "movq %%mm0, %%mm3\n\t"
+ "pcmpgtw %%mm6, %%mm2\n\t"
+ "pmullw %2, %%mm1\n\t"
+ "pandn %%mm4, %%mm2\n\t"
+ "por %%mm5, %%mm2\n\t"
+ "pmullw %%mm2, %%mm0\n\t" /* mm0 = abs(block[i]). */
+ "psllw $1, %%mm0\n\t" /* block[i] <<= 1 */
+ "paddw %%mm5, %%mm0\n\t" /* block[i] ++ */
+
+ "pmullw %%mm0, %%mm1\n\t"
+ "psraw $4, %%mm1\n\t"
+ "pcmpeqw %%mm6, %%mm3\n\t"
+ "psubw %%mm5, %%mm1\n\t" /* block[i] --; */
+ "pandn %%mm4, %%mm3\n\t" /* fake of pcmpneqw : mm0 != 0 then mm1 = -1 */
+ "por %%mm5, %%mm1\n\t" /* block[i] |= 1 */
+ "pmullw %%mm2, %%mm1\n\t" /* change signs again */
+
+ "pand %%mm3, %%mm1\n\t" /* nullify if was zero */
+ "movq %%mm1, %0"
+ :"=m"(block[i])
+ :"m"(block[i]), "m"(quant_matrix[i])
+ :"memory");
+ }
+ }
+}
+
+#ifdef BIN_PORTABILITY
+static void (*dct_unquantize_ptr)(MpegEncContext *s,
+ DCTELEM *block, int n, int qscale);
+
+void MPV_common_init_mmx(void)
+{
+ int mm_flags;
+ mm_flags = mm_support();
+ if (mm_flags & MM_MMX) {
+ dct_unquantize_ptr = dct_unquantize_mmx;
+ }
+ else {
+ dct_unquantize_ptr = dct_unquantize;
+ }
+}
+
+#define DCT_UNQUANTIZE(a,b,c,d) (*dct_unquantize_ptr)(a,b,c,d)
+#else
+#define DCT_UNQUANTIZE(a,b,c,d) dct_unquantize(a,b,c,d)
+#endif /* BIN_PORTABILITY */
+#endif /* HAVE_MMX */
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