RAW SLINEAR Format. More...
#include "asterisk.h"
#include "asterisk/mod_format.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"
Go to the source code of this file.
Defines | |
#define | BUF_SIZE 320 |
#define | SLIN_SAMPLES 160 |
Functions | |
static void | __reg_module (void) |
static void | __unreg_module (void) |
static int | load_module (void) |
static struct ast_frame * | slinear_read (struct ast_filestream *s, int *whennext) |
static int | slinear_seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
static off_t | slinear_tell (struct ast_filestream *fs) |
static int | slinear_trunc (struct ast_filestream *fs) |
static int | slinear_write (struct ast_filestream *fs, struct ast_frame *f) |
static int | unload_module (void) |
Variables | |
static struct ast_module_info __MODULE_INFO_SECTION | __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw Signed Linear Audio support (SLN)" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = 10, } |
static struct ast_module_info * | ast_module_info = &__mod_info |
static struct ast_format | slin_f |
#define BUF_SIZE 320 |
Definition at line 33 of file format_sln.c.
Referenced by slinear_read().
#define SLIN_SAMPLES 160 |
Definition at line 34 of file format_sln.c.
static void __reg_module | ( | void | ) | [static] |
Definition at line 134 of file format_sln.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 134 of file format_sln.c.
static int load_module | ( | void | ) | [static] |
Definition at line 118 of file format_sln.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, and AST_MODULE_LOAD_SUCCESS.
{ if (ast_format_register(&slin_f)) return AST_MODULE_LOAD_FAILURE; return AST_MODULE_LOAD_SUCCESS; }
static struct ast_frame* slinear_read | ( | struct ast_filestream * | s, |
int * | whennext | ||
) | [static, read] |
Definition at line 36 of file format_sln.c.
References AST_FORMAT_SLINEAR, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, BUF_SIZE, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fr, ast_frame::frametype, LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.
{ int res; /* Send a frame from the file to the appropriate channel */ s->fr.frametype = AST_FRAME_VOICE; s->fr.subclass = AST_FORMAT_SLINEAR; s->fr.mallocd = 0; AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) { if (res) ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); return NULL; } *whennext = s->fr.samples = res/2; s->fr.datalen = res; return &s->fr; }
static int slinear_seek | ( | struct ast_filestream * | fs, |
off_t | sample_offset, | ||
int | whence | ||
) | [static] |
Definition at line 73 of file format_sln.c.
References ast_filestream::f, ast_frame::offset, and SEEK_FORCECUR.
{ off_t offset=0,min,cur,max; min = 0; sample_offset <<= 1; cur = ftello(fs->f); fseeko(fs->f, 0, SEEK_END); max = ftello(fs->f); if (whence == SEEK_SET) offset = sample_offset; else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) offset = sample_offset + cur; else if (whence == SEEK_END) offset = max - sample_offset; if (whence != SEEK_FORCECUR) { offset = (offset > max)?max:offset; } /* always protect against seeking past begining. */ offset = (offset < min)?min:offset; return fseeko(fs->f, offset, SEEK_SET); }
static off_t slinear_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 101 of file format_sln.c.
References ast_filestream::f.
{ return ftello(fs->f) / 2; }
static int slinear_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 96 of file format_sln.c.
References ast_filestream::f.
static int slinear_write | ( | struct ast_filestream * | fs, |
struct ast_frame * | f | ||
) | [static] |
Definition at line 55 of file format_sln.c.
References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_log(), ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame::frametype, fwrite, LOG_WARNING, ast_frame::ptr, and ast_frame::subclass.
{ int res; if (f->frametype != AST_FRAME_VOICE) { ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); return -1; } if (f->subclass != AST_FORMAT_SLINEAR) { ast_log(LOG_WARNING, "Asked to write non-slinear frame (%d)!\n", f->subclass); return -1; } if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) { ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); return -1; } return 0; }
static int unload_module | ( | void | ) | [static] |
Definition at line 125 of file format_sln.c.
References ast_format_unregister(), and ast_format::name.
{ return ast_format_unregister(slin_f.name); }
struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw Signed Linear Audio support (SLN)" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = 10, } [static] |
Definition at line 134 of file format_sln.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 134 of file format_sln.c.
struct ast_format slin_f [static] |
Definition at line 106 of file format_sln.c.