main.c

wince下著名的视频播放器源码

/* test_streams - Simple test pattern generator
 * Copyright (C) 2000,2001,2002,2003,2004,2005  Josh Coalson
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#if defined _MSC_VER || defined __MINGW32__
#include <time.h>
#else
#include <sys/time.h>
#endif
#include "FLAC/assert.h"
#include "FLAC/ordinals.h"

#ifndef M_PI
/* math.h in VC++ doesn't seem to have this (how Microsoft is that?) */
#define M_PI 3.14159265358979323846
#endif

#ifdef _WIN32
	static const char *mode = "wb";
#else
	static const char *mode = "w";
#endif

static FLAC__bool is_big_endian_host;


static FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 x)
{
	return
		fputc(x, f) != EOF &&
		fputc(x >> 8, f) != EOF
	;
}

static FLAC__bool write_little_endian_int16(FILE *f, FLAC__int16 x)
{
	return write_little_endian_uint16(f, (FLAC__uint16)x);
}

static FLAC__bool write_little_endian_uint24(FILE *f, FLAC__uint32 x)
{
	return
		fputc(x, f) != EOF &&
		fputc(x >> 8, f) != EOF &&
		fputc(x >> 16, f) != EOF
	;
}

static FLAC__bool write_little_endian_int24(FILE *f, FLAC__int32 x)
{
	return write_little_endian_uint24(f, (FLAC__uint32)x);
}

static FLAC__bool write_little_endian_uint32(FILE *f, FLAC__uint32 x)
{
	return
		fputc(x, f) != EOF &&
		fputc(x >> 8, f) != EOF &&
		fputc(x >> 16, f) != EOF &&
		fputc(x >> 24, f) != EOF
	;
}

#if 0
/* @@@ not used (yet) */
static FLAC__bool write_little_endian_int32(FILE *f, FLAC__int32 x)
{
	return write_little_endian_uint32(f, (FLAC__uint32)x);
}
#endif

static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 x)
{
	return
		fputc(x >> 8, f) != EOF &&
		fputc(x, f) != EOF
	;
}

#if 0
/* @@@ not used (yet) */
static FLAC__bool write_big_endian_int16(FILE *f, FLAC__int16 x)
{
	return write_big_endian_uint16(f, (FLAC__uint16)x);
}
#endif

#if 0
/* @@@ not used (yet) */
static FLAC__bool write_big_endian_uint24(FILE *f, FLAC__uint32 x)
{
	return
		fputc(x >> 16, f) != EOF &&
		fputc(x >> 8, f) != EOF &&
		fputc(x, f) != EOF
	;
}
#endif

#if 0
/* @@@ not used (yet) */
static FLAC__bool write_big_endian_int24(FILE *f, FLAC__int32 x)
{
	return write_big_endian_uint24(f, (FLAC__uint32)x);
}
#endif

static FLAC__bool write_big_endian_uint32(FILE *f, FLAC__uint32 x)
{
	return
		fputc(x >> 24, f) != EOF &&
		fputc(x >> 16, f) != EOF &&
		fputc(x >> 8, f) != EOF &&
		fputc(x, f) != EOF
	;
}

#if 0
/* @@@ not used (yet) */
static FLAC__bool write_big_endian_int32(FILE *f, FLAC__int32 x)
{
	return write_big_endian_uint32(f, (FLAC__uint32)x);
}
#endif

static FLAC__bool write_sane_extended(FILE *f, unsigned val)
	/* Write to 'f' a SANE extended representation of 'val'.  Return false if
	* the write succeeds; return true otherwise.
	*
	* SANE extended is an 80-bit IEEE-754 representation with sign bit, 15 bits
	* of exponent, and 64 bits of significand (mantissa).  Unlike most IEEE-754
	* representations, it does not imply a 1 above the MSB of the significand.
	*
	* Preconditions:
	*  val!=0U
	*/
{
	unsigned int shift, exponent;

	FLAC__ASSERT(val!=0U); /* handling 0 would require a special case */

	for(shift= 0U; (val>>(31-shift))==0U; ++shift)
		;
	val<<= shift;
	exponent= 63U-(shift+32U); /* add 32 for unused second word */

	if(!write_big_endian_uint16(f, (FLAC__uint16)(exponent+0x3FFF)))
		return false;
	if(!write_big_endian_uint32(f, val))
		return false;
	if(!write_big_endian_uint32(f, 0)) /* unused second word */
		return false;

	return true;
}

/* a mono one-sample 16bps stream */
static FLAC__bool generate_01()
{
	FILE *f;
	FLAC__int16 x = -32768;

	if(0 == (f = fopen("test01.raw", mode)))
		return false;

	if(!write_little_endian_int16(f, x))
		goto foo;

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a stereo one-sample 16bps stream */
static FLAC__bool generate_02()
{
	FILE *f;
	FLAC__int16 xl = -32768, xr = 32767;

	if(0 == (f = fopen("test02.raw", mode)))
		return false;

	if(!write_little_endian_int16(f, xl))
		goto foo;
	if(!write_little_endian_int16(f, xr))
		goto foo;

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a mono five-sample 16bps stream */
static FLAC__bool generate_03()
{
	FILE *f;
	FLAC__int16 x[] = { -25, 0, 25, 50, 100 };
	unsigned i;

	if(0 == (f = fopen("test03.raw", mode)))
		return false;

	for(i = 0; i < 5; i++)
		if(!write_little_endian_int16(f, x[i]))
			goto foo;

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a stereo five-sample 16bps stream */
static FLAC__bool generate_04()
{
	FILE *f;
	FLAC__int16 x[] = { -25, 500, 0, 400, 25, 300, 50, 200, 100, 100 };
	unsigned i;

	if(0 == (f = fopen("test04.raw", mode)))
		return false;

	for(i = 0; i < 10; i++)
		if(!write_little_endian_int16(f, x[i]))
			goto foo;

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a mono full-scale deflection 8bps stream */
static FLAC__bool generate_fsd8(const char *fn, const int pattern[], unsigned reps)
{
	FILE *f;
	unsigned rep, p;

	FLAC__ASSERT(pattern != 0);

	if(0 == (f = fopen(fn, mode)))
		return false;

	for(rep = 0; rep < reps; rep++) {
		for(p = 0; pattern[p]; p++) {
			signed char x = pattern[p] > 0? 127 : -128;
			if(fwrite(&x, sizeof(x), 1, f) < 1)
				goto foo;
		}
	}

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a mono full-scale deflection 16bps stream */
static FLAC__bool generate_fsd16(const char *fn, const int pattern[], unsigned reps)
{
	FILE *f;
	unsigned rep, p;

	FLAC__ASSERT(pattern != 0);

	if(0 == (f = fopen(fn, mode)))
		return false;

	for(rep = 0; rep < reps; rep++) {
		for(p = 0; pattern[p]; p++) {
			FLAC__int16 x = pattern[p] > 0? 32767 : -32768;
			if(!write_little_endian_int16(f, x))
				goto foo;
		}
	}

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a stereo wasted-bits-per-sample 16bps stream */
static FLAC__bool generate_wbps16(const char *fn, unsigned samples)
{
	FILE *f;
	unsigned sample;

	if(0 == (f = fopen(fn, mode)))
		return false;

	for(sample = 0; sample < samples; sample++) {
		FLAC__int16 l = (sample % 2000) << 2;
		FLAC__int16 r = (sample % 1000) << 3;
		if(!write_little_endian_int16(f, l))
			goto foo;
		if(!write_little_endian_int16(f, r))
			goto foo;
	}

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a mono full-scale deflection 24bps stream */
static FLAC__bool generate_fsd24(const char *fn, const int pattern[], unsigned reps)
{
	FILE *f;
	unsigned rep, p;

	FLAC__ASSERT(pattern != 0);

	if(0 == (f = fopen(fn, mode)))
		return false;

	for(rep = 0; rep < reps; rep++) {
		for(p = 0; pattern[p]; p++) {
			FLAC__int32 x = pattern[p] > 0? 8388607 : -8388608;
			if(!write_little_endian_int24(f, x))
				goto foo;
		}
	}

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a mono sine-wave 8bps stream */
static FLAC__bool generate_sine8_1(const char *fn, const double sample_rate, const unsigned samples, const double f1, const double a1, const double f2, const double a2)
{
	const FLAC__int8 full_scale = 127;
	const double delta1 = 2.0 * M_PI / ( sample_rate / f1);
	const double delta2 = 2.0 * M_PI / ( sample_rate / f2);
	FILE *f;
	double theta1, theta2;
	unsigned i;

	if(0 == (f = fopen(fn, mode)))
		return false;

	for(i = 0, theta1 = theta2 = 0.0; i < samples; i++, theta1 += delta1, theta2 += delta2) {
		double val = (a1*sin(theta1) + a2*sin(theta2))*(double)full_scale;
		FLAC__int8 v = (FLAC__int8)(val + 0.5);
		if(fwrite(&v, sizeof(v), 1, f) < 1)
			goto foo;
	}

	fclose(f);
	return true;
foo:
	fclose(f);
	return false;
}

/* a stereo sine-wave 8bps stream */
static FLAC__bool generate_sine8_2(const char *fn, const double sample_rate, const unsigned samples, const double f1, const double a1, const double f2, const double a2, double fmult)
{
	const FLAC__int8 full_scale = 127;
	const double delta1 = 2.0 * M_PI / ( sample_rate / f1);
	const double delta2 = 2.0 * M_PI / ( sample_rate / f2);
	FILE *f;
	double theta1, theta2;
	unsigned i;

	if(0 == (f = fopen(fn, mode)))
		return false;

	for(i = 0, theta1 = theta2 = 0.0; i < samples; i++, theta1 += delta1, theta2 += delta2) {
		double val = (a1*sin(theta1) + a2*sin(theta2))*(double)full_scale;
		FLAC__int8 v = (FLAC__int8)(val + 0.5);
		if(fwrite(&v, sizeof(v), 1, f) < 1)
			goto foo;
		val = -(a1*sin(theta1*fmult) + a2*sin(theta2*fmult))*(double)full_scale;
		v = (FLAC__int8)(val + 0.5);
		if(fwrite(&v, sizeof(v), 1, f) < 1)
			goto foo;
	}

	fclose(f);
	return true;