/** @internal @This parses and outputs a m3u file.
*
* @param upipe description structure of the pipe
* @return an error code
*/
static void upipe_m3u_reader_process(struct upipe *upipe)
{
struct upipe_m3u_reader *upipe_m3u_reader =
upipe_m3u_reader_from_upipe(upipe);
if (unlikely(upipe_m3u_reader->current_flow_def == NULL)) {
upipe_m3u_reader->current_flow_def =
uref_dup(upipe_m3u_reader->flow_def);
if (unlikely(upipe_m3u_reader->current_flow_def == NULL)) {
upipe_throw_fatal(upipe, UBASE_ERR_ALLOC);
return;
}
}
/* parse m3u */
int ret = UBASE_ERR_NONE;
struct uref *uref = upipe_m3u_reader->next_uref;
for (size_t offset = 0;
uref &&
ubase_check(ret) &&
ubase_check(uref_block_scan(uref, &offset, '\n'));
offset = 0, uref = upipe_m3u_reader->next_uref) {
struct uref *line =
upipe_m3u_reader_extract_uref_stream(upipe, offset + 1);
ret = upipe_m3u_reader_process_line(
upipe, upipe_m3u_reader->current_flow_def, line);
uref_free(line);
}
if (!ubase_check(ret))
upipe_err(upipe, "invalid m3u");
}
/** @internal @This scans for a sync word.
*
* @param upipe description structure of the pipe
* @param dropped_p filled with the number of octets to drop before the sync
* @return true if a sync word was found
*/
static bool upipe_a52f_scan(struct upipe *upipe, size_t *dropped_p)
{
struct upipe_a52f *upipe_a52f = upipe_a52f_from_upipe(upipe);
while (ubase_check(uref_block_scan(upipe_a52f->next_uref, dropped_p, 0xb))) {
uint8_t word;
if (!ubase_check(uref_block_extract(upipe_a52f->next_uref,
*dropped_p + 1, 1, &word)))
return false;
if (word == 0x77)
return true;
(*dropped_p)++;
}
return false;
}
/** @internal @This scans for a sync word.
*
* @param upipe description structure of the pipe
* @param dropped_p filled with the number of octets to drop before the sync
* @return true if a sync word was found
*/
static bool upipe_s337d_scan(struct upipe *upipe, size_t *dropped_p)
{
struct upipe_s337d *upipe_s337d = upipe_s337d_from_upipe(upipe);
while (ubase_check(uref_block_scan(upipe_s337d->next_uref, dropped_p,
S337_PREAMBLE_A1))) {
uint8_t preamble[3];
if (!ubase_check(uref_block_extract(upipe_s337d->next_uref,
*dropped_p + 1, 3, preamble)))
return false;
if (preamble[0] == S337_PREAMBLE_A2 &&
preamble[1] == S337_PREAMBLE_B1 &&
preamble[2] == S337_PREAMBLE_B2)
return true;
(*dropped_p)++;
}
return false;
}
