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Add linear file generator, CIRCQ emulation for BSD (bug #1626)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2956 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Spencer
2004-05-13 19:01:10 +00:00
parent c9d3a81c3a
commit 6b0805633b
3 changed files with 109 additions and 0 deletions
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103
app.c
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@@ -303,3 +303,106 @@ int ast_dtmf_stream(struct ast_channel *chan,struct ast_channel *peer,char *digi
}
return res;
}
struct linear_state {
int fd;
int autoclose;
int allowoverride;
int origwfmt;
};
static void linear_release(struct ast_channel *chan, void *params)
{
struct linear_state *ls = params;
if (ls->origwfmt && ast_set_write_format(chan, ls->origwfmt)) {
ast_log(LOG_WARNING, "Unable to restore channel '%s' to format '%d'\n", chan->name, ls->origwfmt);
}
if (ls->autoclose)
close(ls->fd);
free(params);
}
static int linear_generator(struct ast_channel *chan, void *data, int len, int samples)
{
struct ast_frame f;
short buf[2048 + AST_FRIENDLY_OFFSET / 2];
struct linear_state *ls = data;
int res;
len = samples * 2;
if (len > sizeof(buf) - AST_FRIENDLY_OFFSET) {
ast_log(LOG_WARNING, "Can't generate %d bytes of data!\n" ,len);
len = sizeof(buf) - AST_FRIENDLY_OFFSET;
}
memset(&f, 0, sizeof(f));
res = read(ls->fd, buf + AST_FRIENDLY_OFFSET/2, len);
if (res > 0) {
f.frametype = AST_FRAME_VOICE;
f.subclass = AST_FORMAT_SLINEAR;
f.data = buf + AST_FRIENDLY_OFFSET/2;
f.datalen = res;
f.samples = res / 2;
f.offset = AST_FRIENDLY_OFFSET;
ast_write(chan, &f);
if (res == len)
return 0;
}
return -1;
}
static void *linear_alloc(struct ast_channel *chan, void *params)
{
struct linear_state *ls;
/* In this case, params is already malloc'd */
if (params) {
ls = params;
if (ls->allowoverride)
chan->writeinterrupt = 1;
else
chan->writeinterrupt = 0;
ls->origwfmt = chan->writeformat;
if (ast_set_write_format(chan, AST_FORMAT_SLINEAR)) {
ast_log(LOG_WARNING, "Unable to set '%s' to linear format (write)\n", chan->name);
free(ls);
ls = params = NULL;
}
}
return params;
}
static struct ast_generator linearstream =
{
alloc: linear_alloc,
release: linear_release,
generate: linear_generator,
};
int ast_linear_stream(struct ast_channel *chan, const char *filename, int fd, int allowoverride)
{
struct linear_state *lin;
char tmpf[256] = "";
int res = -1;
int autoclose = 0;
if (fd < 0) {
if (!filename || ast_strlen_zero(filename))
return -1;
autoclose = 1;
if (filename[0] == '/')
strncpy(tmpf, filename, sizeof(tmpf) - 1);
else
snprintf(tmpf, sizeof(tmpf), "%s/%s/%s", (char *)ast_config_AST_VAR_DIR, "sounds", filename);
fd = open(tmpf, O_RDONLY);
if (fd < 0){
ast_log(LOG_WARNING, "Unable to open file '%s': %s\n", tmpf, strerror(errno));
return -1;
}
}
lin = malloc(sizeof(struct linear_state));
if (lin) {
memset(lin, 0, sizeof(lin));
lin->fd = fd;
lin->allowoverride = allowoverride;
lin->autoclose = autoclose;
res = ast_activate_generator(chan, &linearstream, lin);
}
return res;
}