Lu0老大，请问有没有高见？

我在开发一个USB Audio Device, 接了一个8bit 8KHz 的Codec
现在想录音，但声音老是录不进来或是效果很差，不知所以然。

问题一：

PChost <---> USB MCU (firmware) <---> Codec <---->

描述符文件中的speaker和microphone的采样率要描述成16 bit,就可以识别该Audio,如果描述为8bit就不能识别为Audio，我不知道是为什么呢？


问题二：

firmware在PChost 和 Codec之间转发数据的时候，要如何处理数据?

因为我的Codec是8位的，u-Law/a-Law,所以我得到8位数据以后,如何
把它们加工成16bits per sample并发给PCHost呢?
当PCHost给我发回16bits per sample的数据时，我又应该如何把它们转成8bits per sample呢?

问题三：

我用USB snoopy监控，用录音机录了以后再放，PChost收到的从USB发过来的数据流内容（用录音机录）与从PChost发回给USB（用录音机放）,发现不一样。因而我需要知道Windows对数据的处理过程,为什么录放的数据会不一样呢？
当用16bit 8KHz录音时我检查.wave文件,其数据与我的MCU发送数据一致,但当用录音机放的时候，用snoopy看到的数据却与录的时候看到的不一样了，象是要经过某种算法的。
这里面应该与Microsoft PCM Converter有比较大的关系，所以我想知道其算法以验证数据传输的正确性。

我大概知道了，应该是要符合AC \'97的标准，但现在我急于想知道的是8 bits 和 16 bits per sample 数据是如何转换的以验证我的数据传输正确性。但我找了很久很久都没找到:-<

哈哈 :D

小伙子，笑什么，说来听听。

现在我已经可以录音了，虽然效果比较差，是不是还要滤波啊？？

请问哪有G.711算法和source code，哪位知道望指引，谢谢！！

继续努力

你问题可不少，我能帮点就帮点好了：
G711 Codec一般都是硬件芯片自己做进去了，如果一定要找Souce Code的话，OpenSource里边有。可以查一下Wine这个project的source code,里边有模仿MS ACM的G711代码。我们用的是直接买来的库文件，这种很成熟的标准代码一般不自己开发。我想你有了Source code后自己就可以比较容易转化取样率等等了。
用G711还声音不好就不是encode/decode本身的问题了，你不妨分析一下收到的声音文件，看看失真到底在那些地方，有没有规律可循，应该是那里有bug才会这样，还有要注意的是你的driver的performance很重要，假如有一个环节buffer不满，杂音就会被插入。
不知道这里能发多长的贴子，下面是wine里面G711的代码，参考一下吧。连接：http://www.winehq.com/hypermail/wine-patches/2002/05/0165.html

+/*
+ * G711 handling (includes A-Law & MU-Law)
+ *
+ *      Copyright (C) 2002 Eric Pouech
+ *
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <assert.h>
+#include <string.h>
+#include \"winnls.h\"
+#include \"winbase.h\"
+#include \"wingdi.h\"
+#include \"winuser.h\"
+#include \"msacm.h\"
+#include \"mmreg.h\"
+#include \"../msacmdrv.h\"
+#include \"wine/debug.h\"
+
+WINE_DEFAULT_DEBUG_CHANNEL(g711);
+
+/***********************************************************************
+ *           G711_drvOpen
+ */
+static DWORD G711_drvOpen(LPCSTR str)
+{
+    return 1;
+}
+
+/***********************************************************************
+ *           G711_drvClose
+ */
+static DWORD G711_drvClose(DWORD dwDevID)
+{
+    return 1;
+}
+
+typedef struct tagAcmG711Data
+{
+    void (*convert)(PACMDRVSTREAMINSTANCE adsi,
+    const unsigned char*, LPDWORD, unsigned char*, LPDWORD);
+} AcmG711Data;
+
+/* table to list all supported formats... those are the basic ones. this
+ * also helps given a unique index to each of the supported formats
+ */
+typedef struct
+{
+    int nChannels;
+    int nBits;
+    int rate;
+} Format;
+
+static Format PCM_Formats[] =
+{
+    /*{1,  8,  8000}, {2,  8,  8000}, */{1, 16,  8000}, {2, 16,  8000},
+    /*{1,  8, 11025}, {2,  8, 11025}, */{1, 16, 11025}, {2, 16, 11025},
+    /*{1,  8, 22050}, {2,  8, 22050}, */{1, 16, 22050}, {2, 16, 22050},
+    /*{1,  8, 44100}, {2,  8, 44100}, */{1, 16, 44100}, {2, 16, 44100},
+};
+
+static Format ALaw_Formats[] =
+{
+    {1,  8,  8000}, {2, 8,  8000},  {1,  8, 11025}, {2, 8, 11025},
+    {1,  8, 22050}, {2, 8, 22050},  {1,  8, 44100}, {2, 8, 44100},
+};
+
+static Format ULaw_Formats[] =
+{
+    {1,  8,  8000}, {2, 8,  8000},  {1,  8, 11025}, {2, 8, 11025},
+    {1,  8, 22050}, {2, 8, 22050},  {1,  8, 44100}, {2, 8, 44100},
+};
+
+#define NUM_PCM_FORMATS (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
+#define NUM_ALAW_FORMATS (sizeof(ALaw_Formats) / sizeof(ALaw_Formats[0]))
+#define NUM_ULAW_FORMATS (sizeof(ULaw_Formats) / sizeof(ULaw_Formats[0]))
+
+/***********************************************************************
+ *           G711_GetFormatIndex
+ */
+static DWORD G711_GetFormatIndex(LPWAVEFORMATEX wfx)
+{
+    int i, hi;
+    Format* fmts;
+    
+    switch (wfx->wFormatTag)
+    {
+    case WAVE_FORMAT_PCM:
+ hi = NUM_PCM_FORMATS;
+ fmts = PCM_Formats;
+ break;
+    case WAVE_FORMAT_ALAW:
+ hi = NUM_ALAW_FORMATS;
+ fmts = ALaw_Formats;
+ break;
+    case WAVE_FORMAT_MULAW:
+ hi = NUM_ULAW_FORMATS;
+ fmts = ULaw_Formats;
+ break;
+    default:
+ return 0xFFFFFFFF;
+    }
+    
+    for (i = 0; i < hi; i++)
+    {
+ if (wfx->nChannels == fmts.nChannels &&
+    wfx->nSamplesPerSec == fmts.rate &&
+    wfx->wBitsPerSample == fmts.nBits)
+    return i;
+    }
+    
+    return 0xFFFFFFFF;
+}
+
+/***********************************************************************
+ *           R16
+ *
+ * Read a 16 bit sample (correctly handles endianess)
+ */
+static inline short  R16(const unsigned char* src)
+{
+    return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
+}
+
+/***********************************************************************
+ *           W16
+ *
+ * Write a 16 bit sample (correctly handles endianess)
+ */
+static inline void  W16(unsigned char* dst, short s)
+{
+    dst[0] = LOBYTE(s);
+    dst[1] = HIBYTE(s);
+}
+
+/* You can uncomment this if you don\'t want the statically generated conversion
+ * table, but rather recompute the Xlaw => PCM conversion for each sample
+#define NO_FASTDECODE
+ * Since the conversion tables are rather small (2k), I don\'t think it\'s really
+ * interesting not to use them, but keeping the actual conversion code around
+ * is helpful to regenerate the tables when needed.
+ */
+
+/* -------------------------------------------------------------------------------*/
+
+/*
+ * This source code is a product of Sun Microsystems, Inc. and is provided
+ * for unrestricted use.  Users may copy or modify this source code without
+ * charge.
+ *
+ * SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING
+ * THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun source code is provided with no support and without any obligation on
+ * the part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California  94043
+ */
+
+/*
+ * g711.c
+ *
+ * u-law, A-law and linear PCM conversions.
+ */
+
+/*
+ * December 30, 1994:
+ * Functions linear2alaw, linear2ulaw have been updated to correctly
+ * convert unquantized 16 bit values.
+ * Tables for direct u- to A-law and A- to u-law conversions have been
+ * corrected.
+ * Borge Lindberg, Center for PersonKommunikation, Aalborg University.
+ * bli@cpk.auc.dk
+ *
+ */
+
+#define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */
+#define QUANT_MASK (0xf) /* Quantization field mask. */
+#define NSEGS (8) /* Number of A-law segments. */
+#define SEG_SHIFT (4) /* Left shift for segment number. */
+#define SEG_MASK (0x70) /* Segment field mask. */
+
+static short seg_aend[8] = {0x1F, 0x3F, 0x7F, 0xFF,
+    0x1FF, 0x3FF, 0x7FF, 0xFFF};
+static short seg_uend[8] = {0x3F, 0x7F, 0xFF, 0x1FF,
+    0x3FF, 0x7FF, 0xFFF, 0x1FFF};
+
+/* copy from CCITT G.711 specifications */
+static unsigned char _u2a[128] = { /* u- to A-law conversions */
+ 1, 1, 2, 2, 3, 3, 4, 4,
+ 5, 5, 6, 6, 7, 7, 8, 8,
+ 9, 10, 11, 12, 13, 14, 15, 16,
+ 17, 18, 19, 20, 21, 22, 23, 24,
+ 25, 27, 29, 31, 33, 34, 35, 36,
+ 37, 38, 39, 40, 41, 42, 43, 44,
+ 46, 48, 49, 50, 51, 52, 53, 54,
+ 55, 56, 57, 58, 59, 60, 61, 62,
+ 64, 65, 66, 67, 68, 69, 70, 71,
+ 72, 73, 74, 75, 76, 77, 78, 79,
+/* corrected:
+ 81, 82, 83, 84, 85, 86, 87, 88,
+   should be: */
+ 80, 82, 83, 84, 85, 86, 87, 88,
+ 89, 90, 91, 92, 93, 94, 95, 96,
+ 97, 98, 99, 100, 101, 102, 103, 104,
+ 105, 106, 107, 108, 109, 110, 111, 112,
+ 113, 114, 115, 116, 117, 118, 119, 120,
+ 121, 122, 123, 124, 125, 126, 127, 128};
+
+static unsigned char _a2u[128] = { /* A- to u-law conversions */
+ 1, 3, 5, 7, 9, 11, 13, 15,
+ 16, 17, 18, 19, 20, 21, 22, 23,
+ 24, 25, 26, 27, 28, 29, 30, 31,
+ 32, 32, 33, 33, 34, 34, 35, 35,
+ 36, 37, 38, 39, 40, 41, 42, 43,
+ 44, 45, 46, 47, 48, 48, 49, 49,
+ 50, 51, 52, 53, 54, 55, 56, 57,
+ 58, 59, 60, 61, 62, 63, 64, 64,
+ 65, 66, 67, 68, 69, 70, 71, 72,
+/* corrected:
+ 73, 74, 75, 76, 77, 78, 79, 79,
+   should be: */
+ 73, 74, 75, 76, 77, 78, 79, 80,
+
+ 80, 81, 82, 83, 84, 85, 86, 87,
+ 88, 89, 90, 91, 92, 93, 94, 95,
+ 96, 97, 98, 99, 100, 101, 102, 103,
+ 104, 105, 106, 107, 108, 109, 110, 111,
+ 112, 113, 114, 115, 116, 117, 118, 119,
+ 120, 121, 122, 123, 124, 125, 126, 127};
+
+static short
+search(
+    int val,        /* changed from \"short\" *drago* */
+    short *table,
+    int size)        /* changed from \"short\" *drago* */
+{
+    int i; /* changed from \"short\" *drago* */
+    
+    for (i = 0; i < size; i++) {
+        if (val <= *table++)
+            return (i);
+    }
+    return (size);
+}
+
+/*
+ * linear2alaw() - Convert a 16-bit linear PCM value to 8-bit A-law
+ *
+ * linear2alaw() accepts an 16-bit integer and encodes it as A-law data.
+ *
+ * Linear Input Code Compressed Code
+ * ------------------------ ---------------
+ * 0000000wxyza 000wxyz
+ * 0000001wxyza 001wxyz
+ * 000001wxyzab 010wxyz
+ * 00001wxyzabc 011wxyz
+ * 0001wxyzabcd 100wxyz
+ * 001wxyzabcde 101wxyz
+ * 01wxyzabcdef 110wxyz
+ * 1wxyzabcdefg 111wxyz
+ *
+ * For further information see John C. Bellamy\'s Digital Telephony, 1982,
+ * John Wiley & Sons, pps 98-111 and 472-476.
+ */
+static inline unsigned char
+linear2alaw(int pcm_val) /* 2\'s complement (16-bit range) */
+    /* changed from \"short\" *drago* */
+{
+    int mask; /* changed from \"short\" *drago* */
+    int seg; /* changed from \"short\" *drago* */
+    unsigned char aval;
+    
+    pcm_val = pcm_val >> 3;
+    
+    if (pcm_val >= 0) {
+        mask = 0xD5; /* sign (7th) bit = 1 */
+    } else {
+        mask = 0x55; /* sign bit = 0 */
+        pcm_val = -pcm_val - 1;
+    }
+    
+    /* Convert the scaled magnitude to segment number. */
+    seg = search(pcm_val, seg_aend, 8);
+    
+    /* Combine the sign, segment, and quantization bits. */
+    
+    if (seg >= 8) /* out of range, return maximum value. */
+        return (unsigned char) (0x7F ^ mask);
+    else {
+        aval = (unsigned char) seg << SEG_SHIFT;
+        if (seg < 2)
+            aval |= (pcm_val >> 1) & QUANT_MASK;
+        else
+            aval |= (pcm_val >> seg) & QUANT_MASK;
+        return (aval ^ mask);
+    }
+}
+
+#ifdef NO_FASTDECODE
+/*
+ * alaw2linear() - Convert an A-law value to 16-bit linear PCM
+ *
+ */
+static inline int
+alaw2linear(unsigned char a_val)
+{
+    int t; /* changed from \"short\" *drago* */
+    int seg; /* changed from \"short\" *drago* */
+    
+    a_val ^= 0x55;
+    
+    t = (a_val & QUANT_MASK) << 4;
+    seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
+    switch (seg) {
+    case 0:
+        t += 8;
+        break;
+    case 1:
+        t += 0x108;
+        break;
+    default:
+        t += 0x108;
+        t <<= seg - 1;
+    }
+    return ((a_val & SIGN_BIT) ? t : -t);
+}
+#else
+/* EPP (for Wine):
+ * this array has been statically generated from the above routine
+ */
+static unsigned short _a2l[] = {
+0xEA80, 0xEB80, 0xE880, 0xE980, 0xEE80, 0xEF80, 0xEC80, 0xED80,
+0xE280, 0xE380, 0xE080, 0xE180, 0xE680, 0xE780, 0xE480, 0xE580,
+0xF540, 0xF5C0, 0xF440, 0xF4C0, 0xF740, 0xF7C0, 0xF640, 0xF6C0,
+0xF140, 0xF1C0, 0xF040, 0xF0C0, 0xF340, 0xF3C0, 0xF240, 0xF2C0,
+0xAA00, 0xAE00, 0xA200, 0xA600, 0xBA00, 0xBE00, 0xB200, 0xB600,
+0x8A00, 0x8E00, 0x8200, 0x8600, 0x9A00, 0x9E00, 0x9200, 0x9600,
+0xD500, 0xD700, 0xD100, 0xD300, 0xDD00, 0xDF00, 0xD900, 0xDB00,
+0xC500, 0xC700, 0xC100, 0xC300, 0xCD00, 0xCF00, 0xC900, 0xCB00,
+0xFEA8, 0xFEB8, 0xFE88, 0xFE98, 0xFEE8, 0xFEF8, 0xFEC8, 0xFED8,
+0xFE28, 0xFE38, 0xFE08, 0xFE18, 0xFE68, 0xFE78, 0xFE48, 0xFE58,
+0xFFA8, 0xFFB8, 0xFF88, 0xFF98, 0xFFE8, 0xFFF8, 0xFFC8, 0xFFD8,
+0xFF28, 0xFF38, 0xFF08, 0xFF18, 0xFF68, 0xFF78, 0xFF48, 0xFF58,
+0xFAA0, 0xFAE0, 0xFA20, 0xFA60, 0xFBA0, 0xFBE0, 0xFB20, 0xFB60,
+0xF8A0, 0xF8E0, 0xF820, 0xF860, 0xF9A0, 0xF9E0, 0xF920, 0xF960,
+0xFD50, 0xFD70, 0xFD10, 0xFD30, 0xFDD0, 0xFDF0, 0xFD90, 0xFDB0,
+0xFC50, 0xFC70, 0xFC10, 0xFC30, 0xFCD0, 0xFCF0, 0xFC90, 0xFCB0,
+0x1580, 0x1480, 0x1780, 0x1680, 0x1180, 0x1080, 0x1380, 0x1280,
+0x1D80, 0x1C80, 0x1F80, 0x1E80, 0x1980, 0x1880, 0x1B80, 0x1A80,
+0x0AC0, 0x0A40, 0x0BC0, 0x0B40, 0x08C0, 0x0840, 0x09C0, 0x0940,
+0x0EC0, 0x0E40, 0x0FC0, 0x0F40, 0x0CC0, 0x0C40, 0x0DC0, 0x0D40,
+0x5600, 0x5200, 0x5E00, 0x5A00, 0x4600, 0x4200, 0x4E00, 0x4A00,
+0x7600, 0x7200, 0x7E00, 0x7A00, 0x6600, 0x6200, 0x6E00, 0x6A00,
+0x2B00, 0x2900, 0x2F00, 0x2D00, 0x2300, 0x2100, 0x2700, 0x2500,
+0x3B00, 0x3900, 0x3F00, 0x3D00, 0x3300, 0x3100, 0x3700, 0x3500,
+0x0158, 0x0148, 0x0178, 0x0168, 0x0118, 0x0108, 0x0138, 0x0128,
+0x01D8, 0x01C8, 0x01F8, 0x01E8, 0x0198, 0x0188, 0x01B8, 0x01A8,
+0x0058, 0x0048, 0x0078, 0x0068, 0x0018, 0x0008, 0x0038, 0x0028,
+0x00D8, 0x00C8, 0x00F8, 0x00E8, 0x0098, 0x0088, 0x00B8, 0x00A8,
+0x0560, 0x0520, 0x05E0, 0x05A0, 0x0460, 0x0420, 0x04E0, 0x04A0,
+0x0760, 0x0720, 0x07E0, 0x07A0, 0x0660, 0x0620, 0x06E0, 0x06A0,
+0x02B0, 0x0290, 0x02F0, 0x02D0, 0x0230, 0x0210, 0x0270, 0x0250,
+0x03B0, 0x0390, 0x03F0, 0x03D0, 0x0330, 0x0310, 0x0370, 0x0350,
+};
+static int inline
+alaw2linear(unsigned char a_val)
+{
+    return (short)_a2l[a_val];
+}
+#endif
+
+#define BIAS (0x84) /* Bias for linear code. */
+#define CLIP            8159
+
+/*
+ * linear2ulaw() - Convert a linear PCM value to u-law
+ *
+ * In order to simplify the encoding process, the original linear magnitude
+ * is biased by adding 33 which shifts the encoding range from (0 - 8158) to
+ * (33 - 8191). The result can be seen in the following encoding table:
+ *
+ * Biased Linear Input Code Compressed Code
+ * ------------------------ ---------------
+ * 00000001wxyza 000wxyz
+ * 0000001wxyzab 001wxyz
+ * 000001wxyzabc 010wxyz
+ * 00001wxyzabcd 011wxyz
+ * 0001wxyzabcde 100wxyz
+ * 001wxyzabcdef 101wxyz
+ * 01wxyzabcdefg 110wxyz
+ * 1wxyzabcdefgh 111wxyz
+ *
+ * Each biased linear code has a leading 1 which identifies the segment
+ * number. The value of the segment number is equal to 7 minus the number
+ * of leading 0\'s. The quantization interval is directly available as the
+ * four bits wxyz.  * The trailing bits (a - h) are ignored.
+ *
+ * Ordinarily the complement of the resulting code word is used for
+ * transmission, and so the code word is complemented before it is returned.
+ *
+ * For further information see John C. Bellamy\'s Digital Telephony, 1982,
+ * John Wiley & Sons, pps 98-111 and 472-476.
+ */
+static inline unsigned char
+linear2ulaw(short pcm_val) /* 2\'s complement (16-bit range) */
+{
+    short mask;
+    short seg;
+    unsigned char uval;
+    
+    /* Get the sign and the magnitude of the value. */
+    pcm_val = pcm_val >> 2;
+    if (pcm_val < 0) {
+        pcm_val = -pcm_val;
+        mask = 0x7F;
+    } else {
+        mask = 0xFF;
+    }
+    if ( pcm_val > CLIP ) pcm_val = CLIP; /* clip the magnitude */
+    pcm_val += (BIAS >> 2);
+    
+    /* Convert the scaled magnitude to segment number. */
+    seg = search(pcm_val, seg_uend, 8);
+    
+    /*
+     * Combine the sign, segment, quantization bits;
+     * and complement the code word.
+     */
+    if (seg >= 8) /* out of range, return maximum value. */
+        return (unsigned char) (0x7F ^ mask);
+    else {
+        uval = (unsigned char) (seg << 4) | ((pcm_val >> (seg + 1)) & 0xF);
+        return (uval ^ mask);
+    }
+}
+
+#ifdef NO_FASTDECODE
+/*
+ * ulaw2linear() - Convert a u-law value to 16-bit linear PCM
+ *
+ * First, a biased linear code is derived from the code word. An unbiased
+ * output can then be obtained by subtracting 33 from the biased code.
+ *
+ * Note that this function expects to be passed the complement of the
+ * original code word. This is in keeping with ISDN conventions.
+ */
+static inline short
+ulaw2linear(unsigned char u_val)
+{
+    short t;
+    
+    /* Complement to obtain normal u-law value. */
+    u_val = ~u_val;
+    
+    /*
+     * Extract and bias the quantization bits. Then
+     * shift up by the segment number and subtract out the bias.
+     */
+    t = ((u_val & QUANT_MASK) << 3) + BIAS;
+    t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
+    
+    return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
+}
+#else
+/* EPP (for Wine):
+ * this array has been statically generated from the above routine
+ */
+static unsigned short _u2l[] = {
+0x8284, 0x8684, 0x8A84, 0x8E84, 0x9284, 0x9684, 0x9A84, 0x9E84,
+0xA284, 0xA684, 0xAA84, 0xAE84, 0xB284, 0xB684, 0xBA84, 0xBE84,
+0xC184, 0xC384, 0xC584, 0xC784, 0xC984, 0xCB84, 0xCD84, 0xCF84,
+0xD184, 0xD384, 0xD584, 0xD784, 0xD984, 0xDB84, 0xDD84, 0xDF84,
+0xE104, 0xE204, 0xE304, 0xE404, 0xE504, 0xE604, 0xE704, 0xE804,
+0xE904, 0xEA04, 0xEB04, 0xEC04, 0xED04, 0xEE04, 0xEF04, 0xF004,
+0xF0C4, 0xF144, 0xF1C4, 0xF244, 0xF2C4, 0xF344, 0xF3C4, 0xF444,
+0xF4C4, 0xF544, 0xF5C4, 0xF644, 0xF6C4, 0xF744, 0xF7C4, 0xF844,
+0xF8A4, 0xF8E4, 0xF924, 0xF964, 0xF9A4, 0xF9E4, 0xFA24, 0xFA64,
+0xFAA4, 0xFAE4, 0xFB24, 0xFB64, 0xFBA4, 0xFBE4, 0xFC24, 0xFC64,
+0xFC94, 0xFCB4, 0xFCD4, 0xFCF4, 0xFD14, 0xFD34, 0xFD54, 0xFD74,
+0xFD94, 0xFDB4, 0xFDD4, 0xFDF4, 0xFE14, 0xFE34, 0xFE54, 0xFE74,
+0xFE8C, 0xFE9C, 0xFEAC, 0xFEBC, 0xFECC, 0xFEDC, 0xFEEC, 0xFEFC,
+0xFF0C, 0xFF1C, 0xFF2C, 0xFF3C, 0xFF4C, 0xFF5C, 0xFF6C, 0xFF7C,
+0xFF88, 0xFF90, 0xFF98, 0xFFA0, 0xFFA8, 0xFFB0, 0xFFB8, 0xFFC0,
+0xFFC8, 0xFFD0, 0xFFD8, 0xFFE0, 0xFFE8, 0xFFF0, 0xFFF8, 0x0000,
+0x7D7C, 0x797C, 0x757C, 0x717C, 0x6D7C, 0x697C, 0x657C, 0x617C,
+0x5D7C, 0x597C, 0x557C, 0x517C, 0x4D7C, 0x497C, 0x457C, 0x417C,
+0x3E7C, 0x3C7C, 0x3A7C, 0x387C, 0x367C, 0x347C, 0x327C, 0x307C,
+0x2E7C, 0x2C7C, 0x2A7C, 0x287C, 0x267C, 0x247C, 0x227C, 0x207C,
+0x1EFC, 0x1DFC, 0x1CFC, 0x1BFC, 0x1AFC, 0x19FC, 0x18FC, 0x17FC,
+0x16FC, 0x15FC, 0x14FC, 0x13FC, 0x12FC, 0x11FC, 0x10FC, 0x0FFC,
+0x0F3C, 0x0EBC, 0x0E3C, 0x0DBC, 0x0D3C, 0x0CBC, 0x0C3C, 0x0BBC,
+0x0B3C, 0x0ABC, 0x0A3C, 0x09BC, 0x093C, 0x08BC, 0x083C, 0x07BC,
+0x075C, 0x071C, 0x06DC, 0x069C, 0x065C, 0x061C, 0x05DC, 0x059C,
+0x055C, 0x051C, 0x04DC, 0x049C, 0x045C, 0x041C, 0x03DC, 0x039C,
+0x036C, 0x034C, 0x032C, 0x030C, 0x02EC, 0x02CC, 0x02AC, 0x028C,
+0x026C, 0x024C, 0x022C, 0x020C, 0x01EC, 0x01CC, 0x01AC, 0x018C,
+0x0174, 0x0164, 0x0154, 0x0144, 0x0134, 0x0124, 0x0114, 0x0104,
+0x00F4, 0x00E4, 0x00D4, 0x00C4, 0x00B4, 0x00A4, 0x0094, 0x0084,
+0x0078, 0x0070, 0x0068, 0x0060, 0x0058, 0x0050, 0x0048, 0x0040,
+0x0038, 0x0030, 0x0028, 0x0020, 0x0018, 0x0010, 0x0008, 0x0000,
+};
+static inline short ulaw2linear(unsigned char u_val)
+{
+    return (short)_u2l[u_val];
+}
+#endif
+
+/* A-law to u-law conversion */
+static inline unsigned char
+alaw2ulaw(unsigned char aval)
+{
+    aval &= 0xff;
+    return (unsigned char) ((aval & 0x80) ? (0xFF ^ _a2u[aval ^ 0xD5]) :
+                            (0x7F ^ _a2u[aval ^ 0x55]));
+}
+
+/* u-law to A-law conversion */
+static inline unsigned char
+ulaw2alaw(unsigned char uval)
+{
+    uval &= 0xff;
+    return (unsigned char) ((uval & 0x80) ? (0xD5 ^ (_u2a[0xFF ^ uval] - 1)) :
+                            (unsigned char) (0x55 ^ (_u2a[0x7F ^ uval] - 1)));
+}
+
+/* -------------------------------------------------------------------------------*/
+
+static void cvtXXalaw16K(PACMDRVSTREAMINSTANCE adsi,
+                         const unsigned char* src, LPDWORD srcsize,
+                         unsigned char* dst, LPDWORD dstsize)
+{
+    DWORD       len = min(*srcsize, *dstsize / 2);
+    DWORD       i;
+    short       w;
+    
+    *srcsize = len;
+    *dstsize = len * 2;
+    for (i = 0; i < len; i++)
+    {
+        w = alaw2linear(*src++);
+        W16(dst, w);    dst += 2;
+    }
+}
+
+static void cvtXX16alawK(PACMDRVSTREAMINSTANCE adsi,
+                         const unsigned char* src, LPDWORD srcsize,
+                         unsigned char* dst, LPDWORD dstsize)
+{
+    DWORD       len = min(*srcsize / 2, *dstsize);
+    DWORD       i;
+
+    *srcsize = len * 2;
+    *dstsize = len;
+    for (i = 0; i < len; i++)
+    {
+        *dst++ = linear2alaw(R16(src)); src += 2;
+    }
+}
+
+static void cvtXXulaw16K(PACMDRVSTREAMINSTANCE adsi,
+                         const unsigned char* src, LPDWORD srcsize,
+                         unsigned char* dst, LPDWORD dstsize)
+{
+    DWORD       len = min(*srcsize, *dstsize / 2);
+    DWORD       i;
+    short       w;
+
+    *srcsize = len;
+    *dstsize = len * 2;
+    for (i = 0; i < len; i++)
+    {
+        w = ulaw2linear(*src++);
+        W16(dst, w);    dst += 2;
+    }
+}
+
+static void cvtXX16ulawK(PACMDRVSTREAMINSTANCE adsi,
+                         const unsigned char* src, LPDWORD srcsize,
+                         unsigned char* dst, LPDWORD dstsize)
+{
+    DWORD       len = min(*srcsize / 2, *dstsize);
+    DWORD       i;
+
+    *srcsize = len * 2;
+    *dstsize = len;
+    for (i = 0; i < len; i++)
+    {
+        *dst++ = linear2ulaw(R16(src)); src += 2;
+    }
+}
+
+static void cvtXXalawulawK(PACMDRVSTREAMINSTANCE adsi,
+                           const unsigned char* src, LPDWORD srcsize,
+                           unsigned char* dst, LPDWORD dstsize)
+{
+    DWORD       len = min(*srcsize, *dstsize);
+    DWORD       i;
+
+    *srcsize = len;
+    *dstsize = len;
+
+    for (i = 0; i < len; i++)
+        *dst++ = alaw2ulaw(*src++);
+}
+
+
+static void cvtXXulawalawK(PACMDRVSTREAMINSTANCE adsi,
+                           const unsigned char* src, LPDWORD srcsize,
+                           unsigned char* dst, LPDWORD dstsize)
+{
+    DWORD       len = min(*srcsize, *dstsize);
+    DWORD       i;
+
+    *srcsize = len;
+    *dstsize = len;
+
+    for (i = 0; i < len; i++)
+        *dst++ = ulaw2alaw(*src++);
+}
+
+/***********************************************************************
+ *           G711_DriverDetails
+ *
+ */
+static LRESULT G711_DriverDetails(PACMDRIVERDETAILSW add)
+{
+    add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
+    add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
+    add->wMid = 0xFF;
+    add->wPid = 0x00;
+    add->vdwACM = 0x01000000;
+    add->vdwDriver = 0x01000000;
+    add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
+    add->cFormatTags = 3; /* PCM, G711 A-LAW & MU-LAW */
+    add->cFilterTags = 0;
+    add->hicon = (HICON)0;
+    MultiByteToWideChar( CP_ACP, 0, \"WINE-G711\", -1,
+                         add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
+    MultiByteToWideChar( CP_ACP, 0, \"Wine G711 converter\", -1,
+                         add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
+    MultiByteToWideChar( CP_ACP, 0, \"Brought to you by the Wine team...\", -1,
+                         add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
+    MultiByteToWideChar( CP_ACP, 0, \"Refer to LICENSE file\", -1,
+                         add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
+    add->szFeatures[0] = 0;
+    
+    return MMSYSERR_NOERROR;
+}
+
+/***********************************************************************
+ *           G711_FormatTagDetails
+ *
+ */
+static LRESULT G711_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
+{
+    static WCHAR szPcm[]={\'P\',\'C\',\'M\',0};
+    static WCHAR szALaw[]={\'A\',\'-\',\'L\',\'a\',\'w\',0};
+    static WCHAR szULaw[]={\'U\',\'-\',\'L\',\'a\',\'w\',0};
+    
+    switch (dwQuery)
+    {
+    case ACM_FORMATTAGDETAILSF_INDEX:
+ if (aftd->dwFormatTagIndex >= 3) return ACMERR_NOTPOSSIBLE;
+ break;
+    case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
+ if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
+        {
+            aftd->dwFormatTagIndex = 1;
+    break;
+ }
+ /* fall thru */
+    case ACM_FORMATTAGDETAILSF_FORMATTAG:
+ switch (aftd->dwFormatTag)
+        {
+ case WAVE_FORMAT_PCM: aftd->dwFormatTagIndex = 0; break;
+ case WAVE_FORMAT_ALAW:  aftd->dwFormatTagIndex = 1; break;
+ case WAVE_FORMAT_MULAW: aftd->dwFormatTagIndex = 2; break;
+ default: return ACMERR_NOTPOSSIBLE;
+ }
+ break;
+    default:
+ WARN(\"Unsupported query %08lx\\n\", dwQuery);
+ return MMSYSERR_NOTSUPPORTED;
+    }
+    
+    aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
+    switch (aftd->dwFormatTagIndex)
+    {
+    case 0:
+ aftd->dwFormatTag = WAVE_FORMAT_PCM;
+ aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
+ aftd->cStandardFormats = NUM_PCM_FORMATS;
+        lstrcpyW(aftd->szFormatTag, szPcm);
+        break;
+    case 1:
+ aftd->dwFormatTag = WAVE_FORMAT_ALAW;
+ aftd->cbFormatSize = sizeof(WAVEFORMATEX);
+ aftd->cStandardFormats = NUM_ALAW_FORMATS;
+        lstrcpyW(aftd->szFormatTag, szALaw);
+ break;
+    case 2:
+ aftd->dwFormatTag = WAVE_FORMAT_MULAW;
+ aftd->cbFormatSize = sizeof(WAVEFORMATEX);
+ aftd->cStandardFormats = NUM_ULAW_FORMATS;
+        lstrcpyW(aftd->szFormatTag, szULaw);
+ break;
+    }
+    return MMSYSERR_NOERROR;
+}
+
+/***********************************************************************
+ *           G711_FormatDetails
+ *
+ */
+static LRESULT G711_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
+{
+    switch (dwQuery)
+    {
+    case ACM_FORMATDETAILSF_FORMAT:
+ if (G711_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
+ break;
+    case ACM_FORMATDETAILSF_INDEX:
+ afd->pwfx->wFormatTag = afd->dwFormatTag;
+ switch (afd->dwFormatTag)
+        {
+ case WAVE_FORMAT_PCM:
+    if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
+    afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
+    afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
+    afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
+    afd->pwfx->nBlockAlign = afd->pwfx->nChannels * 2;
+    afd->pwfx->nAvgBytesPerSec = afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
+    break;
+ case WAVE_FORMAT_ALAW:
+    if (afd->dwFormatIndex >= NUM_ALAW_FORMATS) return ACMERR_NOTPOSSIBLE;
+    afd->pwfx->nChannels = ALaw_Formats[afd->dwFormatIndex].nChannels;
+    afd->pwfx->nSamplesPerSec = ALaw_Formats[afd->dwFormatIndex].rate;
+    afd->pwfx->wBitsPerSample = ALaw_Formats[afd->dwFormatIndex].nBits;
+    afd->pwfx->nBlockAlign = ALaw_Formats[afd->dwFormatIndex].nChannels;
+    afd->pwfx->nAvgBytesPerSec = afd->pwfx->nSamplesPerSec * afd->pwfx->nChannels;
+            afd->pwfx->cbSize = 0;
+    break;
+ case WAVE_FORMAT_MULAW:
+    if (afd->dwFormatIndex >= NUM_ULAW_FORMATS) return ACMERR_NOTPOSSIBLE;
+    afd->pwfx->nChannels = ULaw_Formats[afd->dwFormatIndex].nChannels;
+    afd->pwfx->nSamplesPerSec = ULaw_Formats[afd->dwFormatIndex].rate;
+    afd->pwfx->wBitsPerSample = ULaw_Formats[afd->dwFormatIndex].nBits;
+    afd->pwfx->nBlockAlign = ULaw_Formats[afd->dwFormatIndex].nChannels;
+    afd->pwfx->nAvgBytesPerSec = afd->pwfx->nSamplesPerSec * afd->pwfx->nChannels;
+            afd->pwfx->cbSize = 0;
+    break;
+ default:
+    WARN(\"Unsupported tag %08lx\\n\", afd->dwFormatTag);
+    return MMSYSERR_INVALPARAM;
+ }
+ break;
+    default:
+ WARN(\"Unsupported query %08lx\\n\", dwQuery);
+ return MMSYSERR_NOTSUPPORTED;
+    }
+    afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
+    afd->szFormat[0] = 0; /* let MSACM format this for us... */
+    
+    return MMSYSERR_NOERROR;
+}
+
+/***********************************************************************
+ *           G711_FormatSuggest
+ *
+ */
+static LRESULT G711_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
+{
+    /* some tests ... */
+    if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
+ adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
+ G711_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
+    /* FIXME: should do those tests against the real size (according to format tag */
+
+    /* If no suggestion for destination, then copy source value */
+    if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
+ adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
+    if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
+        adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
+
+    if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
+    {
+ if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
+            adfs->pwfxDst->wBitsPerSample = 8;
+        else
+            adfs->pwfxDst->wBitsPerSample = 16;
+    }
+    if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
+    {
+ switch (adfs->pwfxSrc->wFormatTag)
+        {
+        case WAVE_FORMAT_PCM:   adfs->pwfxDst->wFormatTag = WAVE_FORMAT_ALAW; break;
+        case WAVE_FORMAT_ALAW:  adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM; break;
+        case WAVE_FORMAT_MULAW: adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM; break;
+        }
+    }
+    /* check if result is ok */
+    if (G711_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
+
+    /* recompute other values */
+    switch (adfs->pwfxDst->wFormatTag)
+    {
+    case WAVE_FORMAT_PCM:
+        adfs->pwfxDst->nBlockAlign = adfs->pwfxDst->nChannels;
+        adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
+        break;
+    case WAVE_FORMAT_ALAW:
+        adfs->pwfxDst->nBlockAlign = adfs->pwfxDst->nChannels * 2;
+        adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxSrc->nChannels * 2;
+        break;
+    case WAVE_FORMAT_MULAW:
+        adfs->pwfxDst->nBlockAlign =  adfs->pwfxDst->nChannels * 2;
+        adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxSrc->nChannels * 2;
+        break;
+    default:
+        FIXME(\"\\n\");
+        break;
+    }
+
+    return MMSYSERR_NOERROR;
+}
+
+/***********************************************************************
+ *           G711_Reset
+ *
+ */
+static void G711_Reset(PACMDRVSTREAMINSTANCE adsi, AcmG711Data* aad)
+{
+}
+
+/***********************************************************************
+ *           G711_StreamOpen
+ *
+ */
+static LRESULT G711_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
+{
+    AcmG711Data* aad;
+
+    assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
+    
+    if (G711_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
+ G711_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
+ return ACMERR_NOTPOSSIBLE;
+    
+    aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmG711Data));
+    if (aad == 0) return MMSYSERR_NOMEM;
+    
+    adsi->dwDriver = (DWORD)aad;
+    
+    if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
+ adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
+    {
+ goto theEnd;
+    }
+    else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ALAW &&
+             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
+    {
+ /* resampling or mono <=> stereo not available
+         * G711 algo only define 16 bit per sample output
+         */
+ if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
+    adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
+            adsi->pwfxDst->wBitsPerSample != 16)
+    goto theEnd;
+
+ /* g711 A-Law decoding... */
+ if (adsi->pwfxDst->wBitsPerSample == 16)
+    aad->convert = cvtXXalaw16K;
+    }
+    else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
+             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ALAW)
+    {
+ if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
+    adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
+            adsi->pwfxSrc->wBitsPerSample != 16)
+    goto theEnd;
+        
+ /* g711 coding... */
+ if (adsi->pwfxSrc->wBitsPerSample == 16)
+    aad->convert = cvtXX16alawK;
+    }
+    else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MULAW &&
+             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
+    {
+ /* resampling or mono <=> stereo not available
+         * G711 algo only define 16 bit per sample output
+         */
+ if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
+    adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
+            adsi->pwfxDst->wBitsPerSample != 16)
+    goto theEnd;
+
+ /* g711 MU-Law decoding... */
+ if (adsi->pwfxDst->wBitsPerSample == 16)
+    aad->convert = cvtXXulaw16K;
+    }
+    else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
+             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ALAW)
+    {
+ if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
+    adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
+            adsi->pwfxSrc->wBitsPerSample != 16)
+    goto theEnd;
+        
+ /* g711 coding... */
+ if (adsi->pwfxSrc->wBitsPerSample == 16)
+    aad->convert = cvtXX16ulawK;
+    }
+    else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MULAW &&
+             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ALAW)
+    {
+ if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
+    adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels)
+    goto theEnd;
+        
+ /* MU-Law => A-Law... */
+        aad->convert = cvtXXulawalawK;
+    }
+    else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ALAW &&
+             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MULAW)
+    {
+ if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
+    adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels)
+    goto theEnd;
+        
+ /* A-Law => MU-Law... */
+        aad->convert = cvtXXalawulawK;
+    }
+    else goto theEnd;
+
+    G711_Reset(adsi, aad);
+
+    return MMSYSERR_NOERROR;
+    
+ theEnd:
+    HeapFree(GetProcessHeap(), 0, aad);
+    adsi->dwDriver = 0L;
+    return MMSYSERR_NOTSUPPORTED;
+}
+
+/***********************************************************************
+ *           G711_StreamClose
+ *
+ */
+static LRESULT G711_StreamClose(PACMDRVSTREAMINSTANCE adsi)
+{
+    HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
+    return MMSYSERR_NOERROR;
+}
+
+/***********************************************************************
+ *           G711_round
+ *
+ */
+static inline DWORD G711_round(DWORD a, DWORD b, DWORD c)
+{
+    assert(a && b && c);
+    /* to be sure, always return an entire number of c... */
+    return ((double)a * (double)b + (double)c - 1) / (double)c;
+}
+
+/***********************************************************************
+ *           G711_StreamSize
+ *
+ */
+static LRESULT G711_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
+{
+    switch (adss->fdwSize)
+    {
+    case ACM_STREAMSIZEF_DESTINATION:
+ /* cbDstLength => cbSrcLength */
+ if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
+    (adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ALAW ||
+             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MULAW))
+        {
+    adss->cbSrcLength = adss->cbDstLength / 2;
+ }
+        else if ((adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ALAW ||
+                  adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MULAW) &&
+                 adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
+        {
+    adss->cbSrcLength = adss->cbDstLength * 2;
+ }
+        else if ((adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ALAW ||
+                  adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MULAW) &&
+                 (adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ALAW ||
+                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MULAW))
+        {
+    adss->cbSrcLength = adss->cbDstLength;
+        }
+        else
+        {
+    return MMSYSERR_NOTSUPPORTED;
+ }
+ break;
+    case ACM_STREAMSIZEF_SOURCE:
+ /* cbSrcLength => cbDstLength */
+ if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
+    (adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ALAW ||
+             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MULAW))
+        {
+    adss->cbDstLength = adss->cbSrcLength * 2;
+ }
+        else if ((adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ALAW ||
+                  adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MULAW) &&
+                 adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
+        {
+    adss->cbDstLength = adss->cbSrcLength / 2;
+ }
+        else if ((adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ALAW ||
+                  adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MULAW) &&
+                 (adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ALAW ||
+                  adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MULAW))
+        {
+    adss->cbDstLength = adss->cbSrcLength;
+        }
+        else
+        {
+    return MMSYSERR_NOTSUPPORTED;
+ }
+ break;
+    default:
+ WARN(\"Unsupported query %08lx\\n\", adss->fdwSize);
+ return MMSYSERR_NOTSUPPORTED;
+    }
+    FIXME(\"\\n\");
+    return MMSYSERR_NOERROR;
+}
+
+/***********************************************************************
+ *           G711_StreamConvert
+ *
+ */
+static LRESULT G711_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
+{
+    AcmG711Data* aad = (AcmG711Data*)adsi->dwDriver;
+    DWORD nsrc = adsh->cbSrcLength;
+    DWORD ndst = adsh->cbDstLength;
+    
+    if (adsh->fdwConvert &
+ ~(ACM_STREAMCONVERTF_BLOCKALIGN|
+  ACM_STREAMCONVERTF_END|
+  ACM_STREAMCONVERTF_START))
+    {
+ FIXME(\"Unsupported fdwConvert (%08lx), ignoring it\\n\", adsh->fdwConvert);
+    }
+    /* ACM_STREAMCONVERTF_BLOCKALIGN
+     * currently all conversions are block aligned, so do nothing for this flag
+     * ACM_STREAMCONVERTF_END
+     * no pending data, so do nothing for this flag
+     */
+    if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
+    {
+ G711_Reset(adsi, aad);
+    }
+
+    aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
+    adsh->cbSrcLengthUsed = nsrc;
+    adsh->cbDstLengthUsed = ndst;
+    
+    return MMSYSERR_NOERROR;
+}
+
+/**************************************************************************
+ * G711_DriverProc [exported]
+ */
+LRESULT CALLBACK G711_DriverProc(DWORD dwDevID, HDRVR hDriv, UINT wMsg,
+ LPARAM dwParam1, LPARAM dwParam2)
+{
+    TRACE(\"(%08lx %08lx %04x %08lx %08lx);\\n\",
+  dwDevID, (DWORD)hDriv, wMsg, dwParam1, dwParam2);
+    
+    switch (wMsg)
+    {
+    case DRV_LOAD: return 1;
+    case DRV_FREE: return 1;
+    case DRV_OPEN: return G711_drvOpen((LPSTR)dwParam1);
+    case DRV_CLOSE: return G711_drvClose(dwDevID);
+    case DRV_ENABLE: return 1;
+    case DRV_DISABLE: return 1;
+    case DRV_QUERYCONFIGURE: return 1;
+    case DRV_CONFIGURE: MessageBoxA(0, \"MS G711 (a-Law & mu-Law) filter !\", \"Wine Driver\", MB_OK); return 1;
+    case DRV_INSTALL: return DRVCNF_RESTART;
+    case DRV_REMOVE: return DRVCNF_RESTART;
+
+    case ACMDM_DRIVER_NOTIFY:
+ /* no caching from other ACM drivers is done so far */
+ return MMSYSERR_NOERROR;
+
+    case ACMDM_DRIVER_DETAILS:
+ return G711_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
+
+    case ACMDM_FORMATTAG_DETAILS:
+ return G711_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
+
+    case ACMDM_FORMAT_DETAILS:
+ return G711_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
+
+    case ACMDM_FORMAT_SUGGEST:
+ return G711_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
+
+    case ACMDM_STREAM_OPEN:
+ return G711_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
+
+    case ACMDM_STREAM_CLOSE:
+ return G711_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
+
+    case ACMDM_STREAM_SIZE:
+ return G711_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
+
+    case ACMDM_STREAM_CONVERT:
+ return G711_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);
+
+    case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
+    case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
+ /* this converter is not a hardware driver */
+    case ACMDM_FILTERTAG_DETAILS:
+    case ACMDM_FILTER_DETAILS:
+ /* this converter is not a filter */
+    case ACMDM_STREAM_RESET:
+ /* only needed for asynchronous driver... we aren\'t, so just say it */
+ return MMSYSERR_NOTSUPPORTED;
+    case ACMDM_STREAM_PREPARE:
+    case ACMDM_STREAM_UNPREPARE:
+ /* nothing special to do here... so don\'t do anything */
+ return MMSYSERR_NOERROR;
+
+    default:
+ return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
+    }
+    return 0;
+}

谢谢，谢谢，我在review