merge support for the Digium TC400B hardware transcoder

git-svn-id: http://svn.digium.com/svn/zaptel/branches/1.2@2057 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 119 insertions, 1 deletions

diff --git a/zaptel.h b/zaptel.h
index c7b60f7..fefad1f 100644
--- a/zaptel.h
+++ b/zaptel.h
@@ -45,6 +45,7 @@
 #include <linux/interrupt.h>
 #endif
 #include <linux/fs.h>
+#include <linux/list.h>
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 #define LINUX26
@@ -666,6 +667,11 @@ void	*data;
  */
 #define	ZT_SETPOLARITY		_IOW (ZT_CODE, 92, int)
 
+/*
+* Transcoder operations
+*/
+#define ZT_TRANSCODE_OP		_IOWR(ZT_CODE, 93, int)
+
 /* 
  * Startup or Shutdown a span
  */
@@ -695,6 +701,47 @@ void	*data;
 #define ZT_TONEDETECT_ON	(1 << 0)		/* Detect tones */
 #define ZT_TONEDETECT_MUTE	(1 << 1)		/* Mute audio in received channel */
 
+#define ZT_TRANSCODE_MAGIC 0x74a9c0de
+
+/* Operations */
+#define ZT_TCOP_ALLOCATE	1			/* Allocate DTE channel */
+#define ZT_TCOP_TRANSCODE	2			/* Begin transcoding a block */
+#define ZT_TCOP_GETINFO		3			/* Get information (use zt_transcode_info) */
+#define ZT_TCOP_RELEASE         4                       /* Release DTE channel */
+#define ZT_TCOP_TEST            5                       /* test DTE device */
+struct zt_transcode_info {
+	__u32 op;
+	__u32 tcnum;
+	__u8 name[80];
+	__u32 numchannels;
+	__u32 srcfmts;
+	__u32 dstfmts;
+};
+
+#define __ZT_TRANSCODE_BUFSIZ	16384
+#define ZT_TRANSCODE_HDRLEN	256
+#define ZT_TRANSCODE_BUFSIZ	((__ZT_TRANSCODE_BUFSIZ) - (ZT_TRANSCODE_HDRLEN))
+#define ZT_TRANSCODE_DSTOFFSET	(((ZT_TRANSCODE_BUFSIZ) / 2) + ZT_TRANSCODE_HDRLEN)
+#define ZT_TRANSCODE_SRCOFFSET	(((ZT_TRANSCODE_BUFSIZ) / 2) + ZT_TRANSCODE_HDRLEN)
+
+struct zt_transcode_header {
+	__u32 srcfmt;		/* See formats.h -- use TCOP_RESET when you change */
+	__u32 srcoffset; 	/* In bytes -- written by user */
+	__u32 srclen;		/* In bytes -- written by user */
+
+	__u32 dstfmt;		/* See formats.h -- use TCOP_RESET when you change */
+	__u32 dstoffset;  	/* In bytes -- written by user */
+	__u32 dstlen;  		/* In bytes -- read by user */
+	__u32 dstsamples;	/* In timestamp units -- read by user */
+
+	__u32 magic;		/* Magic value -- ZT_TRANSCODE_MAGIC, read by user */
+	__u32 config;		/* Read/write by user */
+	__u32 busy:1;		/* Read/write by user */
+	__u8 userhdr[ZT_TRANSCODE_HDRLEN - (sizeof(__u32) * 14)];	/* Storage for user parameters */
+	__u8 srcdata[ZT_TRANSCODE_BUFSIZ / 2];	/* Storage of source data */
+	__u8 dstdata[ZT_TRANSCODE_BUFSIZ / 2];	/* Storage of destination data */
+};
+
 struct zt_ring_cadence {
 	int ringcadence [ZT_MAX_CADENCE];
 };
@@ -1345,6 +1392,35 @@ struct zt_span {
 #endif	
 };
 
+struct zt_transcoder_channel {
+	void *pvt;
+	struct zt_transcoder *parent;
+	wait_queue_head_t ready;
+	int errorstatus;
+	int offset;
+	unsigned int chan_built:1;
+	unsigned int have_reference:1;
+	unsigned int busy:1;
+	unsigned int transient:1;
+	unsigned int built_fmts;
+	unsigned int flags;
+	unsigned int srcfmt;
+	unsigned int dstfmt;
+	struct zt_transcode_header *tch;
+};
+
+struct zt_transcoder {
+	struct list_head list;
+	struct module *owner;
+	char name[80];
+	int numchannels;
+	unsigned int srcfmts;
+	unsigned int dstfmts;
+	int (*operation)(struct zt_transcoder_channel *channel, int op);
+	/* Transcoder channels */
+	struct zt_transcoder_channel channels[0];
+};
+
 #define ZT_WATCHDOG_NOINTS		(1 << 0)
 
 #define ZT_WATCHDOG_INIT			1000
@@ -1390,10 +1466,23 @@ extern int zt_receive(struct zt_span *span);
 /* Prepare writechunk buffers on all channels for this span */
 extern int zt_transmit(struct zt_span *span);
 
-
 /* Register a span.  Returns 0 on success, -1 on failure.  Pref-master is non-zero if
    we should have preference in being the master device */
 extern int zt_register(struct zt_span *span, int prefmaster);
+ 
+/* Allocate / free memory for a transcoder */
+struct zt_transcoder *zt_transcoder_alloc(int numchans);
+void zt_transcoder_free(struct zt_transcoder *ztc);
+
+/* Register a transcoder */
+int zt_transcoder_register(struct zt_transcoder *tc, struct module *owner);
+
+/* Unregister a transcoder */
+int zt_transcoder_unregister(struct zt_transcoder *tc);
+
+/* Alert a transcoder */
+int zt_transcoder_alert(struct zt_transcoder_channel *ztc);
+
 
 /* Unregister a span */
 extern int zt_unregister(struct zt_span *span);
@@ -1432,6 +1521,8 @@ extern struct zt_tone *zt_dtmf_tone(char digit, int mf);
 extern void zt_ec_chunk(struct zt_chan *chan, unsigned char *rxchunk, const unsigned char *txchunk);
 extern void zt_ec_span(struct zt_span *span);
 
+extern struct file_operations *zt_transcode_fops;
+
 /* Don't use these directly -- they're not guaranteed to
    be there. */
 extern short __zt_mulaw[256];
@@ -1611,5 +1702,32 @@ struct zt_radio_param {
 
 #define	ZT_RADPAR_REMCOMMAND 17	/* Remote conrtol write data block & do cmd */
 
+/* Data formats for capabilities and frames alike (from Asterisk) */
+/*! G.723.1 compression */
+#define ZT_FORMAT_G723_1	(1 << 0)
+/*! GSM compression */
+#define ZT_FORMAT_GSM		(1 << 1)
+/*! Raw mu-law data (G.711) */
+#define ZT_FORMAT_ULAW		(1 << 2)
+/*! Raw A-law data (G.711) */
+#define ZT_FORMAT_ALAW		(1 << 3)
+/*! ADPCM (G.726, 32kbps) */
+#define ZT_FORMAT_G726		(1 << 4)
+/*! ADPCM (IMA) */
+#define ZT_FORMAT_ADPCM		(1 << 5)
+/*! Raw 16-bit Signed Linear (8000 Hz) PCM */
+#define ZT_FORMAT_SLINEAR	(1 << 6)
+/*! LPC10, 180 samples/frame */
+#define ZT_FORMAT_LPC10		(1 << 7)
+/*! G.729A audio */
+#define ZT_FORMAT_G729A		(1 << 8)
+/*! SpeeX Free Compression */
+#define ZT_FORMAT_SPEEX		(1 << 9)
+/*! iLBC Free Compression */
+#define ZT_FORMAT_ILBC		(1 << 10)
+/*! Maximum audio format */
+#define ZT_FORMAT_MAX_AUDIO	(1 << 15)
+/*! Maximum audio mask */
+#define ZT_FORMAT_AUDIO_MASK	((1 << 16) - 1)
 
 #endif /* _LINUX_ZAPTEL_H */