If during translation a codec could not handle a given frame the translation core would return NULL, thus not passing along the "missing" frame. Due to this there was no frame to apply generic plc to, thus rendering it useless. This patch makes it so the translation core produces an interpolated slin frame in the cases where an attempt was made to translate to slin, but failed. This interpolated frame is then passed along and can be used by the generic plc algorithms to fill in the frame. ASTERISK-27814 #close Change-Id: I133d084da87adef913bf2ecc9c9240e3eaf4f40a
290 lines
7.7 KiB
C
290 lines
7.7 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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#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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#include "asterisk/format_cache.h"
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static struct ast_frame *generic_read(struct ast_filestream *s, int *whennext, unsigned int buf_size)
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{
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size_t res;
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/* Send a frame from the file to the appropriate channel */
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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 of %s data (expected %d bytes, read %zu): %s\n",
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ast_format_get_name(s->fr.subclass.format), s->fr.datalen, res,
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strerror(errno));
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}
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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 slinear_write(struct ast_filestream *fs, struct ast_frame *f)
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{
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int res;
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/* Don't try to write an interpolated frame */
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if (f->datalen == 0) {
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return 0;
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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 = 0, cur, max;
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sample_offset <<= 1;
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if ((cur = ftello(fs->f)) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine current position in sln filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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if (fseeko(fs->f, 0, SEEK_END) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to seek to end of sln filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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if ((max = ftello(fs->f)) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine max position in sln filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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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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int fd;
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off_t cur;
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if ((fd = fileno(fs->f)) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for sln filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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if ((cur = ftello(fs->f)) < 0) {
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ast_log(AST_LOG_WARNING, "Unable to determine current position in sln filestream %p: %s\n", fs, strerror(errno));
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return -1;
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}
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/* Truncate file to current length */
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return ftruncate(fd, cur);
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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 struct ast_frame *slinear_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 320);}
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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 struct ast_frame *slinear12_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 480);}
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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 = 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 = slinear12_read,
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.buf_size = 480 + AST_FRIENDLY_OFFSET,
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};
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static struct ast_frame *slinear16_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 640);}
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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 = 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 = slinear16_read,
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.buf_size = 640 + AST_FRIENDLY_OFFSET,
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};
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static struct ast_frame *slinear24_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 960);}
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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 = 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 = slinear24_read,
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.buf_size = 960 + AST_FRIENDLY_OFFSET,
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};
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static struct ast_frame *slinear32_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 1280);}
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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 = 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 = slinear32_read,
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.buf_size = 1280 + AST_FRIENDLY_OFFSET,
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};
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static struct ast_frame *slinear44_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 1764);}
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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 = 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 = slinear44_read,
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.buf_size = 1764 + AST_FRIENDLY_OFFSET,
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};
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static struct ast_frame *slinear48_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 1920);}
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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 = 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 = slinear48_read,
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.buf_size = 1920 + AST_FRIENDLY_OFFSET,
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};
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static struct ast_frame *slinear96_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 3840);}
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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 = 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 = slinear96_read,
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.buf_size = 3840 + AST_FRIENDLY_OFFSET,
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};
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static struct ast_frame *slinear192_read(struct ast_filestream *s, int *whennext){return generic_read(s, whennext, 7680);}
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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 = 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 = 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 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 = -1;
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}
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}
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return res;
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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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slin_f.format = ast_format_slin;
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slin12_f.format = ast_format_slin12;
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slin16_f.format = ast_format_slin16;
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slin24_f.format = ast_format_slin24;
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slin32_f.format = ast_format_slin32;
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slin44_f.format = ast_format_slin44;
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slin48_f.format = ast_format_slin48;
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slin96_f.format = ast_format_slin96;
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slin192_f.format = ast_format_slin192;
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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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unload_module();
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return AST_MODULE_LOAD_DECLINE;
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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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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Raw Signed Linear Audio support (SLN) 8khz-192khz",
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.support_level = AST_MODULE_SUPPORT_CORE,
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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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