Initial import of libFLAC from flac-1.1.2.tar.gz

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5983 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 179 insertions, 0 deletions

diff --git a/apps/codecs/libFLAC/cpu.c b/apps/codecs/libFLAC/cpu.c
new file mode 100644
index 0000000..1e6b279
--- /dev/null
+++ b/apps/codecs/libFLAC/cpu.c
@@ -0,0 +1,179 @@
+/* libFLAC - Free Lossless Audio Codec library
+ * Copyright (C) 2001,2002,2003,2004,2005  Josh Coalson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the Xiph.org Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "private/cpu.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#if defined FLAC__CPU_PPC
+#if !defined FLAC__NO_ASM
+#if defined FLAC__SYS_DARWIN
+#include <sys/sysctl.h>
+#include <mach/mach.h>
+#include <mach/mach_host.h>
+#include <mach/host_info.h>
+#include <mach/machine.h>
+#ifndef CPU_SUBTYPE_POWERPC_970
+#define CPU_SUBTYPE_POWERPC_970 ((cpu_subtype_t) 100)
+#endif
+#else /* FLAC__SYS_DARWIN */
+#include <signal.h>
+#include <setjmp.h>
+
+static sigjmp_buf jmpbuf;
+static volatile sig_atomic_t canjump = 0;
+
+static void sigill_handler (int sig)
+{
+	if (!canjump) {
+		signal (sig, SIG_DFL);
+		raise (sig);
+	}
+	canjump = 0;
+	siglongjmp (jmpbuf, 1);
+}
+#endif /* FLAC__SYS_DARWIN */
+#endif /* FLAC__NO_ASM */
+#endif /* FLAC__CPU_PPC */
+
+const unsigned FLAC__CPUINFO_IA32_CPUID_CMOV = 0x00008000;
+const unsigned FLAC__CPUINFO_IA32_CPUID_MMX = 0x00800000;
+const unsigned FLAC__CPUINFO_IA32_CPUID_FXSR = 0x01000000;
+const unsigned FLAC__CPUINFO_IA32_CPUID_SSE = 0x02000000;
+const unsigned FLAC__CPUINFO_IA32_CPUID_SSE2 = 0x04000000;
+
+const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_3DNOW = 0x80000000;
+const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXT3DNOW = 0x40000000;
+const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXTMMX = 0x00400000;
+
+
+void FLAC__cpu_info(FLAC__CPUInfo *info)
+{
+#ifdef FLAC__CPU_IA32
+	info->type = FLAC__CPUINFO_TYPE_IA32;
+#if !defined FLAC__NO_ASM && defined FLAC__HAS_NASM
+	info->use_asm = true;
+	{
+		unsigned cpuid = FLAC__cpu_info_asm_ia32();
+		info->data.ia32.cmov = (cpuid & FLAC__CPUINFO_IA32_CPUID_CMOV)? true : false;
+		info->data.ia32.mmx = (cpuid & FLAC__CPUINFO_IA32_CPUID_MMX)? true : false;
+		info->data.ia32.fxsr = (cpuid & FLAC__CPUINFO_IA32_CPUID_FXSR)? true : false;
+		info->data.ia32.sse = (cpuid & FLAC__CPUINFO_IA32_CPUID_SSE)? true : false;
+		info->data.ia32.sse2 = (cpuid & FLAC__CPUINFO_IA32_CPUID_SSE2)? true : false;
+
+#ifndef FLAC__SSE_OS
+		info->data.ia32.fxsr = info->data.ia32.sse = info->data.ia32.sse2 = false;
+#endif
+
+#ifdef FLAC__USE_3DNOW
+		cpuid = FLAC__cpu_info_extended_amd_asm_ia32();
+		info->data.ia32._3dnow = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_3DNOW)? true : false;
+		info->data.ia32.ext3dnow = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXT3DNOW)? true : false;
+		info->data.ia32.extmmx = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXTMMX)? true : false;
+#else
+		info->data.ia32._3dnow = info->data.ia32.ext3dnow = info->data.ia32.extmmx = false;
+#endif
+	}
+#else
+	info->use_asm = false;
+#endif
+#elif defined FLAC__CPU_PPC
+	info->type = FLAC__CPUINFO_TYPE_PPC;
+#if !defined FLAC__NO_ASM
+	info->use_asm = true;
+#ifdef FLAC__USE_ALTIVEC
+#if defined FLAC__SYS_DARWIN
+	{
+		int selectors[2] = { CTL_HW, HW_VECTORUNIT };
+		int result = 0;
+		size_t length = sizeof(result);
+		int error = sysctl(selectors, 2, &result, &length, 0, 0);
+
+		info->data.ppc.altivec = error==0 ? result!=0 : 0;
+	}
+	{
+		host_basic_info_data_t hostInfo;
+		mach_msg_type_number_t infoCount;
+
+		infoCount = HOST_BASIC_INFO_COUNT;
+		host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo, &infoCount);
+
+		info->data.ppc.ppc64 = (hostInfo.cpu_type == CPU_TYPE_POWERPC) && (hostInfo.cpu_subtype == CPU_SUBTYPE_POWERPC_970);
+	}
+#else /* FLAC__SYS_DARWIN */
+	{
+		/* no Darwin, do it the brute-force way */
+		/* this is borrowed from MPlayer from the libmpeg2 library */
+		info->data.ppc.altivec = 0;
+		info->data.ppc.ppc64 = 0;
+
+		signal (SIGILL, sigill_handler);
+		if (!sigsetjmp (jmpbuf, 1)) {
+			canjump = 1;
+
+			asm volatile (
+				"mtspr 256, %0\n\t"
+				"vand %%v0, %%v0, %%v0"
+				:
+				: "r" (-1)
+			);
+
+			info->data.ppc.altivec = 1;
+		}
+		canjump = 0;
+		if (!sigsetjmp (jmpbuf, 1)) {
+			int x = 0;
+			canjump = 1;
+
+			/* PPC64 hardware implements the cntlzd instruction */
+			asm volatile ("cntlzd %0, %1" : "=r" (x) : "r" (x) );
+
+			info->data.ppc.ppc64 = 1;
+		}
+		signal (SIGILL, SIG_DFL);
+	}
+#endif /* FLAC__SYS_DARWIN */
+#else /* FLAC__USE_ALTIVEC */
+	info->data.ppc.altivec = 0;
+	info->data.ppc.ppc64 = 0;
+#endif /* FLAC__USE_ALTIVEC */
+#else /* FLAC__NO_ASM */
+	info->use_asm = false;
+#endif /* FLAC__NO_ASM */
+#else
+	info->type = FLAC__CPUINFO_TYPE_UNKNOWN;
+	info->use_asm = false;
+#endif
+}