add a format feeder for conversion from alaw to ulaw and vice versa.

Submitted by:   Orion Hodson <O.Hodson@cs.ucl.ac.uk>

1 files changed, 93 insertions, 0 deletions

diff --git a/sys/dev/sound/pcm/feeder_fmt.c b/sys/dev/sound/pcm/feeder_fmt.c
index 739c7a5..3246489 100644
--- a/sys/dev/sound/pcm/feeder_fmt.c
+++ b/sys/dev/sound/pcm/feeder_fmt.c
@@ -104,6 +104,76 @@ static unsigned char u8_to_ulaw[] = {
    129,  129,  129,  129,  128,  128,  128,  128,
 };
 
+static unsigned char alaw_to_ulaw[] = {
+   42,   43,   40,   41,   46,   47,   44,   45,
+   34,   35,   32,   33,   38,   39,   36,   37,
+   57,   58,   55,   56,   61,   62,   59,   60,
+   49,   50,   48,   48,   53,   54,   51,   52,
+   10,   11,    8,    9,   14,   15,   12,   13,
+    2,    3,    0,    1,    6,    7,    4,    5,
+   26,   27,   24,   25,   30,   31,   28,   29,
+   18,   19,   16,   17,   22,   23,   20,   21,
+   98,   99,   96,   97,  102,  103,  100,  101,
+   93,   93,   92,   92,   95,   95,   94,   94,
+  116,  118,  112,  114,  124,  126,  120,  122,
+  106,  107,  104,  105,  110,  111,  108,  109,
+   72,   73,   70,   71,   76,   77,   74,   75,
+   64,   65,   63,   63,   68,   69,   66,   67,
+   86,   87,   84,   85,   90,   91,   88,   89,
+   79,   79,   78,   78,   82,   83,   80,   81,
+  170,  171,  168,  169,  174,  175,  172,  173,
+  162,  163,  160,  161,  166,  167,  164,  165,
+  185,  186,  183,  184,  189,  190,  187,  188,
+  177,  178,  176,  176,  181,  182,  179,  180,
+  138,  139,  136,  137,  142,  143,  140,  141,
+  130,  131,  128,  129,  134,  135,  132,  133,
+  154,  155,  152,  153,  158,  159,  156,  157,
+  146,  147,  144,  145,  150,  151,  148,  149,
+  226,  227,  224,  225,  230,  231,  228,  229,
+  221,  221,  220,  220,  223,  223,  222,  222,
+  244,  246,  240,  242,  252,  254,  248,  250,
+  234,  235,  232,  233,  238,  239,  236,  237,
+  200,  201,  198,  199,  204,  205,  202,  203,
+  192,  193,  191,  191,  196,  197,  194,  195,
+  214,  215,  212,  213,  218,  219,  216,  217,
+  207,  207,  206,  206,  210,  211,  208,  209,
+};
+
+static unsigned char ulaw_to_alaw[] = {
+   42,   43,   40,   41,   46,   47,   44,   45,
+   34,   35,   32,   33,   38,   39,   36,   37,
+   58,   59,   56,   57,   62,   63,   60,   61,
+   50,   51,   48,   49,   54,   55,   52,   53,
+   10,   11,    8,    9,   14,   15,   12,   13,
+    2,    3,    0,    1,    6,    7,    4,    5,
+   27,   24,   25,   30,   31,   28,   29,   18,
+   19,   16,   17,   22,   23,   20,   21,  106,
+  104,  105,  110,  111,  108,  109,   98,   99,
+   96,   97,  102,  103,  100,  101,  122,  120,
+  126,  127,  124,  125,  114,  115,  112,  113,
+  118,  119,  116,  117,   75,   73,   79,   77,
+   66,   67,   64,   65,   70,   71,   68,   69,
+   90,   91,   88,   89,   94,   95,   92,   93,
+   82,   82,   83,   83,   80,   80,   81,   81,
+   86,   86,   87,   87,   84,   84,   85,   85,
+  170,  171,  168,  169,  174,  175,  172,  173,
+  162,  163,  160,  161,  166,  167,  164,  165,
+  186,  187,  184,  185,  190,  191,  188,  189,
+  178,  179,  176,  177,  182,  183,  180,  181,
+  138,  139,  136,  137,  142,  143,  140,  141,
+  130,  131,  128,  129,  134,  135,  132,  133,
+  155,  152,  153,  158,  159,  156,  157,  146,
+  147,  144,  145,  150,  151,  148,  149,  234,
+  232,  233,  238,  239,  236,  237,  226,  227,
+  224,  225,  230,  231,  228,  229,  250,  248,
+  254,  255,  252,  253,  242,  243,  240,  241,
+  246,  247,  244,  245,  203,  201,  207,  205,
+  194,  195,  192,  193,  198,  199,  196,  197,
+  218,  219,  216,  217,  222,  223,  220,  221,
+  210,  210,  211,  211,  208,  208,  209,  209,
+  214,  214,  215,  215,  212,  212,  213,  213,
+};
+
 /*****************************************************************************/
 
 static int
@@ -447,4 +517,27 @@ static kobj_method_t feeder_u8toulaw_methods[] = {
 };
 FEEDER_DECLARE(feeder_u8toulaw, 0, u8_to_ulaw);
 
+static struct pcm_feederdesc feeder_alawtoulaw_desc[] = {
+	{FEEDER_FMT, AFMT_A_LAW, AFMT_MU_LAW, 0},
+	{FEEDER_FMT, AFMT_A_LAW | AFMT_STEREO, AFMT_MU_LAW | AFMT_STEREO, 0},
+	{0},
+};
+static kobj_method_t feeder_alawtoulaw_methods[] = {
+    	KOBJMETHOD(feeder_feed,		feed_table),
+	{ 0, 0 }
+};
+FEEDER_DECLARE(feeder_alawtoulaw, 0, alaw_to_ulaw);
+
+static struct pcm_feederdesc feeder_ulawtoalaw_desc[] = {
+	{FEEDER_FMT, AFMT_MU_LAW, AFMT_A_LAW, 0},
+	{FEEDER_FMT, AFMT_MU_LAW | AFMT_STEREO, AFMT_A_LAW | AFMT_STEREO, 0},
+	{0},
+};
+static kobj_method_t feeder_ulawtoalaw_methods[] = {
+    	KOBJMETHOD(feeder_feed,		feed_table),
+	{ 0, 0 }
+};
+FEEDER_DECLARE(feeder_ulawtoalaw, 0, ulaw_to_alaw);
+
+