diff options
Diffstat (limited to 'formats/format_au.c')
-rw-r--r-- | formats/format_au.c | 314 |
1 files changed, 0 insertions, 314 deletions
diff --git a/formats/format_au.c b/formats/format_au.c deleted file mode 100644 index 06626a052..000000000 --- a/formats/format_au.c +++ /dev/null @@ -1,314 +0,0 @@ -/* - * Asterisk -- An open source telephony toolkit. - * - * Copyright (C) 2005, Andriy Pylypenko - * Code based on format_wav.c by Mark Spencer - * - * See http://www.asterisk.org for more information about - * the Asterisk project. Please do not directly contact - * any of the maintainers of this project for assistance; - * the project provides a web site, mailing lists and IRC - * channels for your use. - * - * This program is free software, distributed under the terms of - * the GNU General Public License Version 2. See the LICENSE file - * at the top of the source tree. - */ - -/*! - * \file - * - * \brief Work with Sun Microsystems AU format. - * - * signed linear - * \arg File extension: au - * \ingroup formats - */ - -#include <stdlib.h> -#include <sys/time.h> -#include <stdio.h> -#include <unistd.h> -#include <errno.h> -#include <string.h> - -#include "asterisk.h" - -ASTERISK_FILE_VERSION(__FILE__, "$Revision$") - -#include "asterisk/lock.h" -#include "asterisk/channel.h" -#include "asterisk/file.h" -#include "asterisk/logger.h" -#include "asterisk/sched.h" -#include "asterisk/module.h" -#include "asterisk/endian.h" - -#define BUF_SIZE 160 /* samples and 1 byte per sample */ - -#define AU_HEADER_SIZE 24 -#define AU_HEADER(var) u_int32_t var[6] - -#define AU_HDR_MAGIC_OFF 0 -#define AU_HDR_HDR_SIZE_OFF 1 -#define AU_HDR_DATA_SIZE_OFF 2 -#define AU_HDR_ENCODING_OFF 3 -#define AU_HDR_SAMPLE_RATE_OFF 4 -#define AU_HDR_CHANNELS_OFF 5 - -#define AU_ENC_8BIT_ULAW 1 - -#define AU_MAGIC 0x2e736e64 -#if __BYTE_ORDER == __BIG_ENDIAN -#define htoll(b) (b) -#define htols(b) (b) -#define ltohl(b) (b) -#define ltohs(b) (b) -#else -#if __BYTE_ORDER == __LITTLE_ENDIAN -#define htoll(b) \ - (((((b) ) & 0xFF) << 24) | \ - ((((b) >> 8) & 0xFF) << 16) | \ - ((((b) >> 16) & 0xFF) << 8) | \ - ((((b) >> 24) & 0xFF) )) -#define htols(b) \ - (((((b) ) & 0xFF) << 8) | \ - ((((b) >> 8) & 0xFF) )) -#define ltohl(b) htoll(b) -#define ltohs(b) htols(b) -#else -#error "Endianess not defined" -#endif -#endif - - -static int check_header(FILE *f) -{ - AU_HEADER(header); - u_int32_t magic; - u_int32_t hdr_size; - off_t data_size; - u_int32_t encoding; - u_int32_t sample_rate; - u_int32_t channels; - - if (fread(header, 1, AU_HEADER_SIZE, f) != AU_HEADER_SIZE) { - ast_log(LOG_WARNING, "Read failed (header)\n"); - return -1; - } - magic = ltohl(header[AU_HDR_MAGIC_OFF]); - if (magic != (u_int32_t) AU_MAGIC) { - ast_log(LOG_WARNING, "Bad magic: 0x%x\n", magic); - } -/* hdr_size = ltohl(header[AU_HDR_HDR_SIZE_OFF]); - if (hdr_size < AU_HEADER_SIZE)*/ - hdr_size = AU_HEADER_SIZE; -/* data_size = ltohl(header[AU_HDR_DATA_SIZE_OFF]); */ - encoding = ltohl(header[AU_HDR_ENCODING_OFF]); - if (encoding != AU_ENC_8BIT_ULAW) { - ast_log(LOG_WARNING, "Unexpected format: %d. Only 8bit ULAW allowed (%d)\n", encoding, AU_ENC_8BIT_ULAW); - return -1; - } - sample_rate = ltohl(header[AU_HDR_SAMPLE_RATE_OFF]); - if (sample_rate != DEFAULT_SAMPLE_RATE) { - ast_log(LOG_WARNING, "Sample rate can only be 8000 not %d\n", sample_rate); - return -1; - } - channels = ltohl(header[AU_HDR_CHANNELS_OFF]); - if (channels != 1) { - ast_log(LOG_WARNING, "Not in mono: channels=%d\n", channels); - return -1; - } - /* Skip to data */ - fseek(f, 0, SEEK_END); - data_size = ftello(f) - hdr_size; - if (fseek(f, hdr_size, SEEK_SET) == -1 ) { - ast_log(LOG_WARNING, "Failed to skip to data: %d\n", hdr_size); - return -1; - } - return data_size; -} - -static int update_header(FILE *f) -{ - off_t cur, end; - u_int32_t datalen; - int bytes; - - cur = ftello(f); - fseek(f, 0, SEEK_END); - end = ftello(f); - /* data starts 24 bytes in */ - bytes = end - AU_HEADER_SIZE; - datalen = htoll(bytes); - - if (cur < 0) { - ast_log(LOG_WARNING, "Unable to find our position\n"); - return -1; - } - if (fseek(f, AU_HDR_DATA_SIZE_OFF * sizeof(u_int32_t), SEEK_SET)) { - ast_log(LOG_WARNING, "Unable to set our position\n"); - return -1; - } - if (fwrite(&datalen, 1, sizeof(datalen), f) != sizeof(datalen)) { - ast_log(LOG_WARNING, "Unable to set write file size\n"); - return -1; - } - if (fseek(f, cur, SEEK_SET)) { - ast_log(LOG_WARNING, "Unable to return to position\n"); - return -1; - } - return 0; -} - -static int write_header(FILE *f) -{ - AU_HEADER(header); - - header[AU_HDR_MAGIC_OFF] = htoll((u_int32_t) AU_MAGIC); - header[AU_HDR_HDR_SIZE_OFF] = htoll(AU_HEADER_SIZE); - header[AU_HDR_DATA_SIZE_OFF] = 0; - header[AU_HDR_ENCODING_OFF] = htoll(AU_ENC_8BIT_ULAW); - header[AU_HDR_SAMPLE_RATE_OFF] = htoll(DEFAULT_SAMPLE_RATE); - header[AU_HDR_CHANNELS_OFF] = htoll(1); - - /* Write an au header, ignoring sizes which will be filled in later */ - fseek(f, 0, SEEK_SET); - if (fwrite(header, 1, AU_HEADER_SIZE, f) != AU_HEADER_SIZE) { - ast_log(LOG_WARNING, "Unable to write header\n"); - return -1; - } - return 0; -} - -static int au_open(struct ast_filestream *s) -{ - if (check_header(s->f) < 0) - return -1; - return 0; -} - -static int au_rewrite(struct ast_filestream *s, const char *comment) -{ - if (write_header(s->f)) - return -1; - return 0; -} - -static struct ast_frame *au_read(struct ast_filestream *s, int *whennext) -{ - int res; - /* Send a frame from the file to the appropriate channel */ - - s->fr.frametype = AST_FRAME_VOICE; - s->fr.subclass = AST_FORMAT_ULAW; - s->fr.mallocd = 0; - FR_SET_BUF(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); - if ((res = fread(s->fr.data, 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; - s->fr.datalen = res; - return &s->fr; -} - -static int au_write(struct ast_filestream *fs, struct ast_frame *f) -{ - 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_ULAW) { - ast_log(LOG_WARNING, "Asked to write non-ulaw frame (%d)!\n", f->subclass); - return -1; - } - if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) { - ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); - return -1; - } - update_header(fs->f); - return 0; -} - -static int au_seek(struct ast_filestream *fs, off_t sample_offset, int whence) -{ - off_t min, max, cur; - unsigned long offset = 0, samples; - - samples = sample_offset; - min = AU_HEADER_SIZE; - cur = ftello(fs->f); - fseek(fs->f, 0, SEEK_END); - max = ftello(fs->f); - if (whence == SEEK_SET) - offset = samples + min; - else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) - offset = samples + cur; - else if (whence == SEEK_END) - offset = max - samples; - if (whence != SEEK_FORCECUR) { - offset = (offset > max) ? max : offset; - } - /* always protect the header space. */ - offset = (offset < min) ? min : offset; - return fseek(fs->f, offset, SEEK_SET); -} - -static int au_trunc(struct ast_filestream *fs) -{ - if (ftruncate(fileno(fs->f), ftello(fs->f))) - return -1; - return update_header(fs->f); -} - -static off_t au_tell(struct ast_filestream *fs) -{ - off_t offset = ftello(fs->f); - return offset - AU_HEADER_SIZE; -} - -static struct ast_format_lock me = { .usecnt = -1 }; - -static const struct ast_format au_f = { - .name = "au", - .exts = "au", - .format = AST_FORMAT_ULAW, - .open = au_open, - .rewrite = au_rewrite, - .write = au_write, - .seek = au_seek, - .trunc = au_trunc, - .tell = au_tell, - .read = au_read, - .buf_size = BUF_SIZE + AST_FRIENDLY_OFFSET, /* this many shorts */ - .lockp = &me, -}; - -int load_module() -{ - return ast_format_register(&au_f); -} - -int unload_module() -{ - return ast_format_unregister(au_f.name); -} - -int usecount() -{ - return me.usecnt; -} - -char *description() -{ - return "Sun Microsystems AU format (signed linear)"; -} - -char *key() -{ - return ASTERISK_GPL_KEY; -} |