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Merge "format_g726: add support for seeking"

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This commit is contained in:
George Joseph
2019-01-28 07:46:17 -06:00
committed by Gerrit Code Review
parent 423a51ca11 aede739778
commit 42d63b69b0
1 changed files with 33 additions and 2 deletions
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35
formats/format_g726.c
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@@ -155,7 +155,38 @@ static int g726_write(struct ast_filestream *s, struct ast_frame *f)
static int g726_seek(struct ast_filestream *fs, off_t sample_offset, int whence) static int g726_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
{ {
return -1; off_t offset = 0, min = 0, cur, max, distance;
if ((cur = ftello(fs->f)) < 0) {
ast_log(AST_LOG_WARNING, "Unable to determine current position in g726 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 g726 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 g726 filestream %p: %s\n", fs, strerror(errno));
return -1;
}
/* have to fudge to frame here, so not fully to sample */
distance = sample_offset / 2;
if (whence == SEEK_SET) {
offset = distance;
} else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) {
offset = distance + cur;
} else if (whence == SEEK_END) {
offset = max - distance;
}
if (whence != SEEK_FORCECUR) {
offset = offset > max ? max : offset;
offset = offset < min ? min : offset;
}
return fseeko(fs->f, offset, SEEK_SET);
} }
static int g726_trunc(struct ast_filestream *fs) static int g726_trunc(struct ast_filestream *fs)
@@ -165,7 +196,7 @@ static int g726_trunc(struct ast_filestream *fs)
static off_t g726_tell(struct ast_filestream *fs) static off_t g726_tell(struct ast_filestream *fs)
{ {
return -1; return ftello(fs->f) << 1;
} }
static struct ast_format_def f[] = { static struct ast_format_def f[] = {