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 = ASTERISK_GPL_KEY , .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 = ASTERISK_GPL_KEY , .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.

                                        {
    .name = "sln12",
    .exts = "sln12",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear12_read,
    .buf_size = 480 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin16_f

struct ast_format_def slin16_f

static

Definition at line 152 of file format_sln.c.

                                        {
    .name = "sln16",
    .exts = "sln16",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear16_read,
    .buf_size = 640 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin192_f

struct ast_format_def slin192_f

static

Definition at line 224 of file format_sln.c.

                                         {
    .name = "sln192",
    .exts = "sln192",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear192_read,
    .buf_size = 7680 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin24_f

struct ast_format_def slin24_f

static

Definition at line 164 of file format_sln.c.

                                        {
    .name = "sln24",
    .exts = "sln24",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear24_read,
    .buf_size = 960 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin32_f

struct ast_format_def slin32_f

static

Definition at line 176 of file format_sln.c.

                                        {
    .name = "sln32",
    .exts = "sln32",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear32_read,
    .buf_size = 1280 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin44_f

struct ast_format_def slin44_f

static

Definition at line 188 of file format_sln.c.

                                        {
    .name = "sln44",
    .exts = "sln44",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear44_read,
    .buf_size = 1764 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin48_f

struct ast_format_def slin48_f

static

Definition at line 200 of file format_sln.c.

                                        {
    .name = "sln48",
    .exts = "sln48",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear48_read,
    .buf_size = 1920 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin96_f

struct ast_format_def slin96_f

static

Definition at line 212 of file format_sln.c.

                                        {
    .name = "sln96",
    .exts = "sln96",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear96_read,
    .buf_size = 3840 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin_f

struct ast_format_def slin_f

static

Definition at line 128 of file format_sln.c.

                                      {
    .name = "sln",
    .exts = "sln|slin|raw",
    .write = slinear_write,
    .seek = slinear_seek,
    .trunc = slinear_trunc,
    .tell = slinear_tell,
    .read = slinear_read,
    .buf_size = 320 + AST_FRIENDLY_OFFSET,
};

Referenced by load_module().

slin_list

struct ast_format_def* slin_list[]

static

Definition at line 235 of file format_sln.c.

                                            {
    &slin_f,
    &slin12_f,
    &slin16_f,
    &slin24_f,
    &slin32_f,
    &slin44_f,
    &slin48_f,
    &slin96_f,
    &slin192_f,
};

Referenced by load_module(), and unload_module().