/*
* cmyth_livetv_chain_get_block(cmyth_recorder_t rec, char *buf,
* unsigned long len)
* Scope: PUBLIC
* Description
* Read incoming file data off the network into a buffer of length len.
*
* Return Value:
* Sucess: number of bytes read into buf
* Failure: -1
*/
int
cmyth_livetv_chain_get_block(cmyth_recorder_t rec, char *buf,
unsigned long len)
{
cmyth_file_t file;
int rc;
cmyth_dbg(CMYTH_DBG_DEBUG, "%s [%s:%d]: (trace) {\n",
__FUNCTION__, __FILE__, __LINE__);
if (!rec || !rec->rec_connected) {
return -EINVAL;
}
if ((file=cmyth_livetv_current_file(rec)) == NULL) {
return -1;
}
rc = cmyth_file_get_block(file, buf, len);
ref_release(file);
cmyth_dbg(CMYTH_DBG_DEBUG, "%s [%s:%d]: (trace) }\n",
__FUNCTION__, __FILE__, __LINE__);
return rc;
}
static int
fill_buffer(int i, char *buf, size_t size)
{
int tot, len, n = 0;
tot = 0;
len = cmyth_file_request_block(files[i].file, size);
while (tot < len) {
n = cmyth_file_get_block(files[i].file, buf+tot, len-tot);
if (n > 0) {
tot += n;
}
if (n <= 0) {
return -1;
}
}
debug("%s(): tot %d len %d n %d size %lld\n", __FUNCTION__,
tot, len, n, (long long)size);
if (len < 0) {
return -1;
}
return tot;
}
/*
* cmyth_livetv_chain_get_block(cmyth_recorder_t rec, char *buf,
* unsigned long len)
* Scope: PUBLIC
* Description
* Read incoming file data off the network into a buffer of length len.
*
* Return Value:
* Sucess: number of bytes read into buf
* Failure: -1
*/
int
cmyth_livetv_chain_get_block(cmyth_recorder_t rec, char *buf,
unsigned long len)
{
if (!rec) {
cmyth_dbg(CMYTH_DBG_ERROR, "%s: no connection\n",
__FUNCTION__);
return -EINVAL;
}
return cmyth_file_get_block(rec->rec_livetv_file, buf, len);
}
/*
* cmyth_file_seek()
*
* Scope: PUBLIC
*
* Description
*
* Seek to a new position in the file based on the value of whence:
* WHENCE_SET
* The offset is set to offset bytes.
* WHENCE_CUR
* The offset is set to the current position plus offset bytes.
* WHENCE_END
* The offset is set to the size of the file minus offset bytes.
*
* Return Value:
*
* Sucess: 0
*
* Failure: an int containing -errno
*/
int64_t
cmyth_file_seek(cmyth_file_t file, int64_t offset, int8_t whence)
{
char msg[128];
int err;
int count;
int64_t c;
int r;
int64_t ret;
if (file == NULL)
return -EINVAL;
if ((offset == 0) && (whence == WHENCE_CUR))
return file->file_pos;
if ((offset == file->file_pos) && (whence == WHENCE_SET))
return file->file_pos;
pthread_mutex_lock(&mutex);
ret = 0;
while(file->file_pos < file->file_req) {
c = file->file_req - file->file_pos;
if(c > sizeof(msg))
c = sizeof(msg);
if ((ret = cmyth_file_get_block(file, msg, (size_t)c)) < 0)
break;
}
if (ret < 0)
goto out;
if (file->file_control->conn_version >= 66) {
/*
* Since protocol 66 mythbackend expects to receive a single 64 bit integer rather than
* two 32 bit hi and lo integers.
*/
snprintf(msg, sizeof(msg),
"QUERY_FILETRANSFER %"PRIu32"[]:[]SEEK[]:[]%"PRId64"[]:[]%"PRId8"[]:[]%"PRId64,
file->file_id,
offset,
whence,
file->file_pos);
}
else {
snprintf(msg, sizeof(msg),
"QUERY_FILETRANSFER %"PRIu32"[]:[]SEEK[]:[]%"PRId32"[]:[]%"PRId32"[]:[]%"PRId8"[]:[]%"PRId32"[]:[]%"PRId32,
file->file_id,
(int32_t)(offset >> 32),
(int32_t)(offset & 0xffffffff),
whence,
(int32_t)(file->file_pos >> 32),
(int32_t)(file->file_pos & 0xffffffff));
}
if ((err = cmyth_send_message(file->file_control, msg)) < 0) {
cmyth_dbg(CMYTH_DBG_ERROR,
"%s: cmyth_send_message() failed (%d)\n",
__FUNCTION__, err);
ret = err;
goto out;
}
if ((count=cmyth_rcv_length(file->file_control)) < 0) {
cmyth_dbg(CMYTH_DBG_ERROR,
"%s: cmyth_rcv_length() failed (%d)\n",
__FUNCTION__, count);
ret = count;
goto out;
}
if ((r=cmyth_rcv_int64(file->file_control, &err, &c, count)) < 0) {
cmyth_dbg(CMYTH_DBG_ERROR,
"%s: cmyth_rcv_int64() failed (%d)\n",
__FUNCTION__, r);
ret = err;
goto out;
}
file->file_pos = c;
file->file_req = file->file_pos;
if(file->file_pos > file->file_length)
file->file_length = file->file_pos;
ret = file->file_pos;
out:
pthread_mutex_unlock(&mutex);
return ret;
}
/*
* cmyth_file_seek(cmyth_file_t file, long long offset, int whence)
*
* Scope: PUBLIC
*
* Description
*
* Seek to a new position in the file based on the value of whence:
* SEEK_SET
* The offset is set to offset bytes.
* SEEK_CUR
* The offset is set to the current position plus offset bytes.
* SEEK_END
* The offset is set to the size of the file minus offset bytes.
*
* Return Value:
*
* Sucess: 0
*
* Failure: an int containing -errno
*/
long long
cmyth_file_seek(cmyth_file_t file, long long offset, int whence)
{
char msg[128];
int err;
int count;
int64_t c;
long r;
long long ret;
if (file == NULL)
return -EINVAL;
if ((offset == 0) && (whence == SEEK_CUR))
return file->file_pos;
if ((offset == file->file_pos) && (whence == SEEK_SET))
return file->file_pos;
while(file->file_pos < file->file_req) {
c = file->file_req - file->file_pos;
if(c > sizeof(msg))
c = sizeof(msg);
if (cmyth_file_get_block(file, msg, (unsigned long)c) < 0)
return -1;
}
pthread_mutex_lock(&mutex);
if (file->file_control->conn_version >= 66) {
/*
* Since protocol 66 mythbackend expects to receive a single 64 bit integer rather than
* two 32 bit hi and lo integers.
*/
snprintf(msg, sizeof(msg),
"QUERY_FILETRANSFER %ld[]:[]SEEK[]:[]%"PRIu64"[]:[]%d[]:[]%"PRIu64,
file->file_id,
(int64_t)offset,
whence,
(int64_t)file->file_pos);
}
else {
snprintf(msg, sizeof(msg),
"QUERY_FILETRANSFER %ld[]:[]SEEK[]:[]%d[]:[]%d[]:[]%d[]:[]%d[]:[]%d",
file->file_id,
(int32_t)(offset >> 32),
(int32_t)(offset & 0xffffffff),
whence,
(int32_t)(file->file_pos >> 32),
(int32_t)(file->file_pos & 0xffffffff));
}
if ((err = cmyth_send_message(file->file_control, msg)) < 0) {
cmyth_dbg(CMYTH_DBG_ERROR,
"%s: cmyth_send_message() failed (%d)\n",
__FUNCTION__, err);
ret = err;
goto out;
}
if ((count=cmyth_rcv_length(file->file_control)) < 0) {
cmyth_dbg(CMYTH_DBG_ERROR,
"%s: cmyth_rcv_length() failed (%d)\n",
__FUNCTION__, count);
ret = count;
goto out;
}
if ((r=cmyth_rcv_int64(file->file_control, &err, &c, count)) < 0) {
cmyth_dbg(CMYTH_DBG_ERROR,
"%s: cmyth_rcv_int64() failed (%d)\n",
__FUNCTION__, r);
ret = err;
goto out;
}
switch (whence) {
case SEEK_SET:
file->file_pos = offset;
break;
case SEEK_CUR:
file->file_pos += offset;
break;
case SEEK_END:
file->file_pos = file->file_length - offset;
break;
}
file->file_req = file->file_pos;
if(file->file_pos > file->file_length)
file->file_length = file->file_pos;
ret = file->file_pos;
out:
pthread_mutex_unlock(&mutex);
return ret;
}