Default structure for translators, with the basic fields and buffers, all allocated as part of the same chunk of memory. The buffer is preceded by AST_FRIENDLY_OFFSET bytes in front of the user portion. 'buf' points right after this space. More...

#include <translate.h>

Collaboration diagram for ast_trans_pvt:

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Data Fields
int	datalen
	actual space used in outbuf
struct ast_format	explicit_dst
struct ast_frame	f
struct ast_trans_pvt *	next
struct timeval	nextin
struct timeval	nextout
union {
char * c
int16_t * i16
unsigned char * uc
uint8_t * ui8
}	outbuf
plc_state_t *	plc
void *	pvt
int	samples
struct ast_translator *	t

Detailed Description

Default structure for translators, with the basic fields and buffers, all allocated as part of the same chunk of memory. The buffer is preceded by AST_FRIENDLY_OFFSET bytes in front of the user portion. 'buf' points right after this space.

*_framein() routines operate in two ways: 1. some convert on the fly and place the data directly in outbuf; in this case 'samples' and 'datalen' contain the number of samples and number of bytes available in the buffer. In this case we can use a generic *_frameout() routine that simply takes whatever is there and places it into the output frame. 2. others simply store the (unconverted) samples into a working buffer, and leave the conversion task to *_frameout(). In this case, the intermediate buffer must be in the private descriptor, 'datalen' is left to 0, while 'samples' is still updated with the number of samples received.

Definition at line 204 of file translate.h.

Field Documentation

char* c

the useful portion of the buffer

Definition at line 218 of file translate.h.

Referenced by ast_trans_frameout(), dahdi_decoder_frameout(), dahdi_encoder_frameout(), lintoadpcm_frameout(), lintoalaw_framein(), lintog726_framein(), lintog726aal2_framein(), lintogsm_frameout(), lintospeex_frameout(), lintoulaw_framein(), and newpvt().

int datalen

actual space used in outbuf

Definition at line 215 of file translate.h.

Referenced by adpcmtolin_framein(), alawtolin_framein(), alawtoulaw_framein(), ast_trans_frameout(), dahdi_decoder_framein(), dahdi_decoder_frameout(), dahdi_encoder_framein(), dahdi_encoder_frameout(), g722tolin_framein(), g726aal2tolin_framein(), g726tolin_framein(), gsmtolin_framein(), ilbctolin_framein(), lintoalaw_framein(), lintog722_framein(), lintog726_framein(), lintog726aal2_framein(), lintoulaw_framein(), lpc10tolin_framein(), resamp_framein(), speextolin_framein(), ulawtoalaw_framein(), ulawtolin(), and ulawtolin_framein().

struct ast_format explicit_dst

If a translation path using a format with attributes requires the output to be a specific set of attributes, this variable will be set describing those attributes to the translator. Otherwise, the translator must choose a set of format attributes for the destination that preserves the quality of the audio in the best way possible.

Definition at line 212 of file translate.h.

Referenced by newpvt().

struct ast_frame f

used in frameout

Definition at line 206 of file translate.h.

Referenced by ast_trans_frameout(), dahdi_decoder_frameout(), dahdi_encoder_frameout(), framein(), and lintospeex_frameout().

int16_t* i16

Definition at line 220 of file translate.h.

Referenced by adpcmtolin_framein(), alawtolin_framein(), g722tolin_framein(), g726aal2tolin_framein(), g726tolin_framein(), gsmtolin_framein(), ilbctolin_framein(), lpc10tolin_framein(), resamp_framein(), speextolin_framein(), ulawtolin(), and ulawtolin_framein().