format_sln.c File Reference

RAW SLINEAR Formats. More...

#include "asterisk.h"
#include "asterisk/mod_format.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"
#include "asterisk/format_cache.h"

Include dependency graph for format_sln.c:

Go to the source code of this file.

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static struct ast_frame *	generic_read (struct ast_filestream *s, int *whennext, unsigned int buf_size)
static int	load_module (void)
static struct ast_frame *	slinear12_read (struct ast_filestream *s, int *whennext)
static struct ast_frame *	slinear16_read (struct ast_filestream *s, int *whennext)
static struct ast_frame *	slinear192_read (struct ast_filestream *s, int *whennext)
static struct ast_frame *	slinear24_read (struct ast_filestream *s, int *whennext)
static struct ast_frame *	slinear32_read (struct ast_filestream *s, int *whennext)
static struct ast_frame *	slinear44_read (struct ast_filestream *s, int *whennext)
static struct ast_frame *	slinear48_read (struct ast_filestream *s, int *whennext)
static struct ast_frame *	slinear96_read (struct ast_filestream *s, int *whennext)
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	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw Signed Linear Audio support (SLN) 8khz-192khz" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static const struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_format_def	slin12_f
static struct ast_format_def	slin16_f
static struct ast_format_def	slin192_f
static struct ast_format_def	slin24_f
static struct ast_format_def	slin32_f
static struct ast_format_def	slin44_f
static struct ast_format_def	slin48_f
static struct ast_format_def	slin96_f
static struct ast_format_def	slin_f
static struct ast_format_def *	slin_list []

Detailed Description

RAW SLINEAR Formats.

Definition in file format_sln.c.

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 289 of file format_sln.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 289 of file format_sln.c.

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 289 of file format_sln.c.

generic_read()

static struct ast_frame * generic_read ( struct ast_filestream *  s, int *  whennext, unsigned int  buf_size  )

static

Definition at line 35 of file format_sln.c.

{
    size_t res;
 
    /* Send a frame from the file to the appropriate channel */
    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 of %s data (expected %d bytes, read %zu): %s\n",
                    ast_format_get_name(s->fr.subclass.format), s->fr.datalen, res,
                    strerror(errno));
        }
        return NULL;
    }
    *whennext = s->fr.samples = res/2;
    s->fr.datalen = res;
    return &s->fr;
}

References ast_format_get_name(), AST_FRAME_SET_BUFFER, AST_FRIENDLY_OFFSET, ast_log, ast_filestream::buf, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_filestream::fr, LOG_WARNING, NULL, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

Referenced by slinear12_read(), slinear16_read(), slinear192_read(), slinear24_read(), slinear32_read(), slinear44_read(), slinear48_read(), slinear96_read(), and slinear_read().

load_module()

static int load_module ( void  )

static

Definition at line 260 of file format_sln.c.

{
    int i;
 
    slin_f.format = ast_format_slin;
    slin12_f.format = ast_format_slin12;
    slin16_f.format = ast_format_slin16;
    slin24_f.format = ast_format_slin24;
    slin32_f.format = ast_format_slin32;
    slin44_f.format = ast_format_slin44;
    slin48_f.format = ast_format_slin48;
    slin96_f.format = ast_format_slin96;
    slin192_f.format = ast_format_slin192;
 
    for (i = 0; i < ARRAY_LEN(slin_list); i++) {
        if (ast_format_def_register(slin_list[i])) {
            unload_module();
            return AST_MODULE_LOAD_DECLINE;
        }
    }
 
    return AST_MODULE_LOAD_SUCCESS;
}

References ARRAY_LEN, ast_format_def_register, ast_format_slin, ast_format_slin12, ast_format_slin16, ast_format_slin192, ast_format_slin24, ast_format_slin32, ast_format_slin44, ast_format_slin48, ast_format_slin96, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_format_def::format, slin12_f, slin16_f, slin192_f, slin24_f, slin32_f, slin44_f, slin48_f, slin96_f, slin_f, slin_list, and unload_module().

slinear12_read()

static struct ast_frame * slinear12_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 139 of file format_sln.c.

{return generic_read(s, whennext, 480);}

References generic_read().

slinear16_read()

static struct ast_frame * slinear16_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 151 of file format_sln.c.

{return generic_read(s, whennext, 640);}

References generic_read().

slinear192_read()

static struct ast_frame * slinear192_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 223 of file format_sln.c.

{return generic_read(s, whennext, 7680);}

References generic_read().

slinear24_read()

static struct ast_frame * slinear24_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 163 of file format_sln.c.

{return generic_read(s, whennext, 960);}

References generic_read().

slinear32_read()

static struct ast_frame * slinear32_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 175 of file format_sln.c.

{return generic_read(s, whennext, 1280);}

References generic_read().

slinear44_read()

static struct ast_frame * slinear44_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 187 of file format_sln.c.

{return generic_read(s, whennext, 1764);}

References generic_read().

slinear48_read()

static struct ast_frame * slinear48_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 199 of file format_sln.c.

{return generic_read(s, whennext, 1920);}

References generic_read().

slinear96_read()

static struct ast_frame * slinear96_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 211 of file format_sln.c.

{return generic_read(s, whennext, 3840);}

References generic_read().

slinear_read()

static struct ast_frame * slinear_read ( struct ast_filestream *  s, int *  whennext  )

static

Definition at line 127 of file format_sln.c.

{return generic_read(s, whennext, 320);}

References generic_read().

slinear_seek()

static int slinear_seek ( struct ast_filestream *  fs, off_t  sample_offset, int  whence  )

static

Definition at line 70 of file format_sln.c.

{
    off_t offset=0, min = 0, cur, max;
 
    sample_offset <<= 1;
 
    if ((cur = ftello(fs->f)) < 0) {
        ast_log(AST_LOG_WARNING, "Unable to determine current position in sln filestream %p: %s\n", fs, strerror(errno));
        return -1;
    }
 
    if (fseeko(fs->f, 0, SEEK_END) < 0) {
        ast_log(AST_LOG_WARNING, "Unable to seek to end of sln filestream %p: %s\n", fs, strerror(errno));
        return -1;
    }
 
    if ((max = ftello(fs->f)) < 0) {
        ast_log(AST_LOG_WARNING, "Unable to determine max position in sln filestream %p: %s\n", fs, strerror(errno));
        return -1;
    }
 
    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);
}

References ast_log, AST_LOG_WARNING, errno, ast_filestream::f, max, min, ast_frame::offset, and SEEK_FORCECUR.

slinear_tell()

static off_t slinear_tell ( struct ast_filestream *  fs )

static

Definition at line 122 of file format_sln.c.

{
    return ftello(fs->f) / 2;
}

References ast_filestream::f.

slinear_trunc()

static int slinear_trunc ( struct ast_filestream *  fs )

static

Definition at line 105 of file format_sln.c.

{
    int fd;
    off_t cur;
 
    if ((fd = fileno(fs->f)) < 0) {
        ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for sln filestream %p: %s\n", fs, strerror(errno));
        return -1;
    }
    if ((cur = ftello(fs->f)) < 0) {
        ast_log(AST_LOG_WARNING, "Unable to determine current position in sln filestream %p: %s\n", fs, strerror(errno));
        return -1;
    }
    /* Truncate file to current length */
    return ftruncate(fd, cur);
}

References ast_log, AST_LOG_WARNING, errno, and ast_filestream::f.

slinear_write()

static int slinear_write ( struct ast_filestream *  fs, struct ast_frame *  f  )

static

Definition at line 54 of file format_sln.c.

{
    int res;
 
    /* Don't try to write an interpolated frame */
    if (f->datalen == 0) {
        return 0;
    }
 
    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;
}

References ast_log, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, LOG_WARNING, and ast_frame::ptr.

unload_module()

static int unload_module ( void  )

static

Definition at line 247 of file format_sln.c.

{
    int res = 0;
    int i = 0;
 
    for (i = 0; i < ARRAY_LEN(slin_list); i++) {
        if (ast_format_def_unregister(slin_list[i]->name)) {
            res = -1;
        }
    }
    return res;
}

References ARRAY_LEN, ast_format_def_unregister(), name, and slin_list.

Referenced by load_module().

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw Signed Linear Audio support (SLN) 8khz-192khz" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }

static

Definition at line 289 of file format_sln.c.

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 289 of file format_sln.c.

slin12_f

struct ast_format_def slin12_f

static

Definition at line 140 of file format_sln.c.

Referenced by load_module().

slin16_f

struct ast_format_def slin16_f

static

Definition at line 152 of file format_sln.c.

Referenced by load_module().

slin192_f

struct ast_format_def slin192_f

static

Definition at line 224 of file format_sln.c.

Referenced by load_module().

slin24_f

struct ast_format_def slin24_f

static

Definition at line 164 of file format_sln.c.

Referenced by load_module().

slin32_f

struct ast_format_def slin32_f

static

Definition at line 176 of file format_sln.c.

Referenced by load_module().

slin44_f

struct ast_format_def slin44_f

static

Definition at line 188 of file format_sln.c.

Referenced by load_module().

slin48_f

struct ast_format_def slin48_f

static

Definition at line 200 of file format_sln.c.

Referenced by load_module().

slin96_f

struct ast_format_def slin96_f

static

Definition at line 212 of file format_sln.c.

Referenced by load_module().

slin_f

struct ast_format_def slin_f

static

Definition at line 128 of file format_sln.c.

Referenced by load_module().

slin_list

struct ast_format_def* slin_list[]

static

Definition at line 235 of file format_sln.c.

Referenced by load_module(), and unload_module().