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Defines | |
#define | _SPANDSP_T38_NON_ECM_BUFFER_H_ |
#define | T38_NON_ECM_TX_BUF_LEN 16384 |
Typedefs | |
typedef struct t38_non_ecm_buffer_state_s | t38_non_ecm_buffer_state_t |
A flow controlled non-ECM image data buffer, for buffering T.38 to analogue modem data. | |
Functions | |
t38_non_ecm_buffer_state_t * | t38_non_ecm_buffer_init (t38_non_ecm_buffer_state_t *s, int mode, int min_row_bits) |
Initialise a T.38 rate adapting non-ECM buffer context. | |
int | t38_non_ecm_buffer_release (t38_non_ecm_buffer_state_t *s) |
int | t38_non_ecm_buffer_free (t38_non_ecm_buffer_state_t *s) |
void | t38_non_ecm_buffer_set_mode (t38_non_ecm_buffer_state_t *s, int mode, int min_row_bits) |
Set the mode of a T.38 rate adapting non-ECM buffer context. | |
void | t38_non_ecm_buffer_inject (t38_non_ecm_buffer_state_t *s, const uint8_t *buf, int len) |
Inject data to T.38 rate adapting non-ECM buffer context. | |
void | t38_non_ecm_buffer_push (t38_non_ecm_buffer_state_t *s) |
Inform a T.38 rate adapting non-ECM buffer context that the incoming data has finished, and the contents of the buffer should be played out as quickly as possible. | |
void | t38_non_ecm_buffer_report_input_status (t38_non_ecm_buffer_state_t *s, logging_state_t *logging) |
Report the input status of a T.38 rate adapting non-ECM buffer context to the specified logging context. | |
void | t38_non_ecm_buffer_report_output_status (t38_non_ecm_buffer_state_t *s, logging_state_t *logging) |
Report the output status of a T.38 rate adapting non-ECM buffer context to the specified logging context. | |
SPAN_DECLARE_NONSTD (int) t38_non_ecm_buffer_get_bit(void *user_data) | |
Get the next bit of data from a T.38 rate adapting non-ECM buffer context. |
#define T38_NON_ECM_TX_BUF_LEN 16384 |
The buffer length much be a power of two. The chosen length is big enough for over 9s of data at the V.17 14,400bps rate.
Referenced by t38_non_ecm_buffer_inject().
SPAN_DECLARE_NONSTD | ( | int | ) |
Get the next bit of data from a T.38 rate adapting non-ECM buffer context.
user_data | The buffer context, cast to a void pointer. |
Get a bit of received non-ECM image data.
Get the next bit of a transmitted serial bit stream.
A dummy routine to use as a receive callback, when we aren't really trying to process what is received. It just absorbs and ignores the data.
user_data | The context. | |
amp | The signal.buffer | |
len | The length of the signal buffer |
t38_non_ecm_buffer_state_t* t38_non_ecm_buffer_init | ( | t38_non_ecm_buffer_state_t * | s, | |
int | mode, | |||
int | min_row_bits | |||
) |
Initialise a T.38 rate adapting non-ECM buffer context.
s | The buffer context. | |
mode | TRUE for image data mode, or FALSE for TCF mode. | |
bits | The minimum number of bits per FAX image row. |
Referenced by t38_gateway_init().
void t38_non_ecm_buffer_inject | ( | t38_non_ecm_buffer_state_t * | s, | |
const uint8_t * | buf, | |||
int | len | |||
) |
Inject data to T.38 rate adapting non-ECM buffer context.
s | The buffer context. | |
buf | The data buffer to be injected. | |
len | The length of the data to be injected. |
References T38_NON_ECM_TX_BUF_LEN.
void t38_non_ecm_buffer_push | ( | t38_non_ecm_buffer_state_t * | s | ) |
Inform a T.38 rate adapting non-ECM buffer context that the incoming data has finished, and the contents of the buffer should be played out as quickly as possible.
s | The buffer context. |
void t38_non_ecm_buffer_report_input_status | ( | t38_non_ecm_buffer_state_t * | s, | |
logging_state_t * | logging | |||
) |
Report the input status of a T.38 rate adapting non-ECM buffer context to the specified logging context.
s | The buffer context. | |
logging | The logging context. |
References span_log().
void t38_non_ecm_buffer_report_output_status | ( | t38_non_ecm_buffer_state_t * | s, | |
logging_state_t * | logging | |||
) |
Report the output status of a T.38 rate adapting non-ECM buffer context to the specified logging context.
s | The buffer context. | |
logging | The logging context. |
References span_log().
void t38_non_ecm_buffer_set_mode | ( | t38_non_ecm_buffer_state_t * | s, | |
int | mode, | |||
int | min_row_bits | |||
) |
Set the mode of a T.38 rate adapting non-ECM buffer context.
s | The buffer context. | |
mode | TRUE for image data mode, or FALSE for TCF mode. | |
bits | The minimum number of bits per FAX image row. |