275 lines
8.6 KiB
C
275 lines
8.6 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Anthony Minessale
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* Anthony Minessale (anthmct@yahoo.com)
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief RAW SLINEAR Formats
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* \ingroup formats
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/mod_format.h"
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#include "asterisk/module.h"
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#include "asterisk/endian.h"
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static struct ast_frame *generic_read(struct ast_filestream *s, int *whennext, unsigned int buf_size, enum ast_format_id id)
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{
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int res;
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/* Send a frame from the file to the appropriate channel */
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s->fr.frametype = AST_FRAME_VOICE;
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ast_format_set(&s->fr.subclass.format, id, 0);
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s->fr.mallocd = 0;
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AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, buf_size);
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if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) {
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if (res)
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ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
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return NULL;
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}
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*whennext = s->fr.samples = res/2;
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s->fr.datalen = res;
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return &s->fr;
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}
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static int generic_write(struct ast_filestream *fs, struct ast_frame *f, enum ast_format_id id)
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{
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int res;
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if (f->frametype != AST_FRAME_VOICE) {
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ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
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return -1;
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}
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if (f->subclass.format.id != id) {
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ast_log(LOG_WARNING, "Asked to write non-slinear frame (%s)!\n", ast_getformatname(&f->subclass.format));
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return -1;
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}
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if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
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ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
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return -1;
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}
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return 0;
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}
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static int slinear_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
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{
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off_t offset=0,min,cur,max;
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min = 0;
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sample_offset <<= 1;
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cur = ftello(fs->f);
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fseeko(fs->f, 0, SEEK_END);
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max = ftello(fs->f);
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if (whence == SEEK_SET)
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offset = sample_offset;
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else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
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offset = sample_offset + cur;
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else if (whence == SEEK_END)
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offset = max - sample_offset;
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if (whence != SEEK_FORCECUR) {
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offset = (offset > max)?max:offset;
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}
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/* always protect against seeking past begining. */
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offset = (offset < min)?min:offset;
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return fseeko(fs->f, offset, SEEK_SET);
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}
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static int slinear_trunc(struct ast_filestream *fs)
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{
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return ftruncate(fileno(fs->f), ftello(fs->f));
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}
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static off_t slinear_tell(struct ast_filestream *fs)
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{
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return ftello(fs->f) / 2;
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}
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static int slinear_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR);}
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static struct ast_frame *slinear_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 320, AST_FORMAT_SLINEAR);}
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static struct ast_format_def slin_f = {
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.name = "sln",
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.exts = "sln|raw",
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.write = slinear_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear_read,
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.buf_size = 320 + AST_FRIENDLY_OFFSET,
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};
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static int slinear12_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR12);}
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static struct ast_frame *slinear12_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 480, AST_FORMAT_SLINEAR12);}
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static struct ast_format_def slin12_f = {
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.name = "sln12",
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.exts = "sln12",
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.write = slinear12_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear12_read,
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.buf_size = 480 + AST_FRIENDLY_OFFSET,
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};
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static int slinear16_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR16);}
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static struct ast_frame *slinear16_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 640, AST_FORMAT_SLINEAR16);}
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static struct ast_format_def slin16_f = {
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.name = "sln16",
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.exts = "sln16",
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.write = slinear16_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear16_read,
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.buf_size = 640 + AST_FRIENDLY_OFFSET,
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};
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static int slinear24_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR24);}
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static struct ast_frame *slinear24_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 960, AST_FORMAT_SLINEAR24);}
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static struct ast_format_def slin24_f = {
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.name = "sln24",
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.exts = "sln24",
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.write = slinear24_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear24_read,
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.buf_size = 960 + AST_FRIENDLY_OFFSET,
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};
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static int slinear32_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR32);}
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static struct ast_frame *slinear32_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 1280, AST_FORMAT_SLINEAR32);}
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static struct ast_format_def slin32_f = {
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.name = "sln32",
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.exts = "sln32",
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.write = slinear32_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear32_read,
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.buf_size = 1280 + AST_FRIENDLY_OFFSET,
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};
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static int slinear44_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR44);}
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static struct ast_frame *slinear44_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 1764, AST_FORMAT_SLINEAR44);}
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static struct ast_format_def slin44_f = {
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.name = "sln44",
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.exts = "sln44",
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.write = slinear44_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear44_read,
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.buf_size = 1764 + AST_FRIENDLY_OFFSET,
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};
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static int slinear48_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR48);}
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static struct ast_frame *slinear48_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 1920, AST_FORMAT_SLINEAR48);}
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static struct ast_format_def slin48_f = {
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.name = "sln48",
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.exts = "sln48",
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.write = slinear48_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear48_read,
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.buf_size = 1920 + AST_FRIENDLY_OFFSET,
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};
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static int slinear96_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR96);}
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static struct ast_frame *slinear96_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 3840, AST_FORMAT_SLINEAR96);}
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static struct ast_format_def slin96_f = {
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.name = "sln96",
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.exts = "sln96",
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.write = slinear96_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear96_read,
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.buf_size = 3840 + AST_FRIENDLY_OFFSET,
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};
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static int slinear192_write(struct ast_filestream *fs, struct ast_frame *f){return generic_write(fs, f, AST_FORMAT_SLINEAR192);}
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static struct ast_frame *slinear192_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 7680, AST_FORMAT_SLINEAR192);}
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static struct ast_format_def slin192_f = {
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.name = "sln192",
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.exts = "sln192",
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.write = slinear192_write,
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.seek = slinear_seek,
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.trunc = slinear_trunc,
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.tell = slinear_tell,
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.read = slinear192_read,
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.buf_size = 7680 + AST_FRIENDLY_OFFSET,
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};
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static struct ast_format_def *slin_list[] = {
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&slin_f,
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&slin12_f,
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&slin16_f,
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&slin24_f,
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&slin32_f,
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&slin44_f,
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&slin48_f,
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&slin96_f,
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&slin192_f,
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};
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static int load_module(void)
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{
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int i;
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ast_format_set(&slin_f.format, AST_FORMAT_SLINEAR, 0);
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ast_format_set(&slin12_f.format, AST_FORMAT_SLINEAR12, 0);
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ast_format_set(&slin16_f.format, AST_FORMAT_SLINEAR16, 0);
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ast_format_set(&slin24_f.format, AST_FORMAT_SLINEAR24, 0);
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ast_format_set(&slin32_f.format, AST_FORMAT_SLINEAR32, 0);
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ast_format_set(&slin44_f.format, AST_FORMAT_SLINEAR44, 0);
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ast_format_set(&slin48_f.format, AST_FORMAT_SLINEAR48, 0);
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ast_format_set(&slin96_f.format, AST_FORMAT_SLINEAR96, 0);
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ast_format_set(&slin192_f.format, AST_FORMAT_SLINEAR192, 0);
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for (i = 0; i < ARRAY_LEN(slin_list); i++) {
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if (ast_format_def_register(slin_list[i])) {
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return AST_MODULE_LOAD_FAILURE;
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}
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}
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return AST_MODULE_LOAD_SUCCESS;
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}
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static int unload_module(void)
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{
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int res = 0;
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int i = 0;
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for (i = 0; i < ARRAY_LEN(slin_list); i++) {
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if (ast_format_def_unregister(slin_list[i]->name)) {
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res |= AST_MODULE_LOAD_FAILURE;
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}
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}
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return res;
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Raw Signed Linear Audio support (SLN) 8khz-192khz",
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.load = load_module,
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.unload = unload_module,
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.load_pri = AST_MODPRI_APP_DEPEND
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);
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