added the ability to set the audio gain in openzap channels via software

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@1061 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/openzap/src/include/openzap.h

@@ -494,7 +494,8 @@ typedef enum {
 	ZAP_TYPE_CHANNEL
 } zap_data_type_t;
 
-
+/* 2^8 table size, one for each byte value */
+#define ZAP_GAINS_TABLE_SIZE 256
 struct zap_channel {
 	zap_data_type_t data_type;
 	uint32_t span_id;
@@ -556,6 +557,10 @@ struct zap_channel {
 	zap_hash_t *variable_hash;
 	unsigned char rx_cas_bits;
 	uint32_t pre_buffer_size;
+	unsigned char rxgain_table[ZAP_GAINS_TABLE_SIZE];
+	unsigned char txgain_table[ZAP_GAINS_TABLE_SIZE];
+	float rxgain;
+	float txgain;
 };
 
 

libs/openzap/src/include/zap_types.h

@@ -69,6 +69,7 @@ typedef struct zap_interrupt zap_interrupt_t;
 
 #define ZAP_COMMAND_OBJ_INT *((int *)obj)
 #define ZAP_COMMAND_OBJ_CHAR_P (char *)obj
+#define ZAP_COMMAND_OBJ_FLOAT *((float *)obj)
 #define ZAP_FSK_MOD_FACTOR 0x10000
 #define ZAP_DEFAULT_DTMF_ON 250
 #define ZAP_DEFAULT_DTMF_OFF 50
@@ -380,7 +381,9 @@ typedef enum {
 	ZAP_CHANNEL_PROGRESS = (1 << 21),
 	ZAP_CHANNEL_MEDIA = (1 << 22),
 	ZAP_CHANNEL_ANSWERED = (1 << 23),
-	ZAP_CHANNEL_MUTE = (1 << 24)
+	ZAP_CHANNEL_MUTE = (1 << 24),
+	ZAP_CHANNEL_USE_RX_GAIN = (1 << 25),
+	ZAP_CHANNEL_USE_TX_GAIN = (1 << 26),
 } zap_channel_flag_t;
 
 typedef enum {