/** @internal @This parses A/52 header.
*
* @param upipe description structure of the pipe
* @return false in case the header is inconsistent
*/
static bool upipe_a52f_parse_a52(struct upipe *upipe)
{
struct upipe_a52f *upipe_a52f = upipe_a52f_from_upipe(upipe);
uint8_t header[A52_SYNCINFO_SIZE + 2];
if (unlikely(!ubase_check(uref_block_extract(upipe_a52f->next_uref, 0,
sizeof(header), header))))
return true; /* not enough data */
ssize_t next_frame_size = a52_get_frame_size(a52_get_fscod(header),
a52_get_frmsizecod(header));
if (!next_frame_size)
return false;
if (likely(a52_sync_compare_formats(header, upipe_a52f->sync_header) &&
header[5] == upipe_a52f->sync_header[5] &&
header[6] == upipe_a52f->sync_header[6])) {
/* identical sync */
upipe_a52f->next_frame_size = next_frame_size;
return true;
}
/* sample rate */
uint64_t samplerate;
switch (a52_get_fscod(header)) {
case A52_FSCOD_48KHZ:
samplerate = 48000;
break;
case A52_FSCOD_441KHZ:
samplerate = 44100;
break;
case A52_FSCOD_32KHZ:
samplerate = 32000;
break;
default:
upipe_warn(upipe, "reserved fscod");
return false;
}
/* frame size */
upipe_a52f->next_frame_size = next_frame_size;
/* channels */
int acmod = a52_get_acmod(header);
int channels = acmod_chans[acmod].nfchans +
((header[6] >> (4 - acmod_chans[acmod].lfe_offset)) & 1);
uint64_t octetrate = a52_bitrate_tab[a52_get_frmsizecod(header)] * 1000 / 8;
memcpy(upipe_a52f->sync_header, header, A52_SYNCINFO_SIZE + 2);
upipe_a52f->samplerate = samplerate;
struct uref *flow_def = upipe_a52f_alloc_flow_def_attr(upipe);
if (unlikely(!flow_def)) {
upipe_throw_fatal(upipe, UBASE_ERR_ALLOC);
return false;
}
UBASE_FATAL(upipe, uref_flow_set_complete(flow_def))
UBASE_FATAL(upipe, uref_flow_set_def(flow_def, "block.ac3.sound."))
UBASE_FATAL(upipe, uref_sound_flow_set_samples(flow_def, A52_FRAME_SAMPLES))
UBASE_FATAL(upipe, uref_sound_flow_set_rate(flow_def, samplerate))
UBASE_FATAL(upipe, uref_sound_flow_set_channels(flow_def, channels))
UBASE_FATAL(upipe, uref_clock_set_latency(flow_def,
upipe_a52f->input_latency +
UCLOCK_FREQ * A52_FRAME_SAMPLES / samplerate))
UBASE_FATAL(upipe, uref_block_flow_set_octetrate(flow_def, octetrate))
flow_def = upipe_a52f_store_flow_def_attr(upipe, flow_def);
if (unlikely(!flow_def)) {
upipe_throw_fatal(upipe, UBASE_ERR_ALLOC);
return false;
}
upipe_a52f_store_flow_def(upipe, flow_def);
return true;
}
/** @internal @This works on a telx frame and outputs it.
*
* @param upipe description structure of the pipe
* @param upump_p reference to pump that generated the buffer
*/
static void upipe_telxf_work(struct upipe *upipe, struct upump **upump_p)
{
struct upipe_telxf *upipe_telxf = upipe_telxf_from_upipe(upipe);
uint64_t octetrate =
(upipe_telxf->next_uref_size * upipe_telxf->fps.num +
upipe_telxf->fps.den - 1) / upipe_telxf->fps.den;
if (octetrate != upipe_telxf->octetrate) {
upipe_telxf->octetrate = octetrate;
struct uref *flow_def = upipe_telxf_alloc_flow_def_attr(upipe);
if (unlikely(flow_def == NULL)) {
upipe_throw_fatal(upipe, UBASE_ERR_ALLOC);
uref_free(upipe_telxf->next_uref);
goto upipe_telxf_work_err;
}
UBASE_FATAL(upipe, uref_pic_flow_set_fps(flow_def, upipe_telxf->fps))
UBASE_FATAL(upipe, uref_block_flow_set_octetrate(flow_def,
upipe_telxf->octetrate))
flow_def = upipe_telxf_store_flow_def_attr(upipe, flow_def);
if (unlikely(flow_def == NULL)) {
upipe_throw_fatal(upipe, UBASE_ERR_ALLOC);
uref_free(upipe_telxf->next_uref);
goto upipe_telxf_work_err;
}
upipe_telxf_store_flow_def(upipe, flow_def);
}
upipe_telxf_sync_acquired(upipe);
uint64_t duration = UCLOCK_FREQ * upipe_telxf->fps.den /
upipe_telxf->fps.num;
/* We work on encoded data so in the DTS domain. Rebase on DTS. */
uint64_t date;
struct urational drift_rate;
drift_rate.den = 0;
uref_clock_get_rate(upipe_telxf->next_uref, &drift_rate);
#define SET_DATE(dv) \
if (ubase_check(uref_clock_get_dts_##dv(upipe_telxf->next_uref, &date)))\
uref_clock_set_dts_##dv(&upipe_telxf->au_uref_s, date); \
if (ubase_check(uref_clock_get_dts_##dv(&upipe_telxf->au_uref_s, \
&date))) { \
uref_clock_set_dts_##dv(upipe_telxf->next_uref, date); \
uref_clock_set_dts_##dv(&upipe_telxf->au_uref_s, date + duration); \
} else if (ubase_check(uref_clock_get_cr_##dv(upipe_telxf->next_uref, \
&date))) { \
/* EN 300 472 Annex A */ \
uref_clock_set_dts_##dv(upipe_telxf->next_uref, \
date + MAX_DELAY_TELX); \
uref_clock_set_dts_##dv(&upipe_telxf->au_uref_s, date + \
MAX_DELAY_TELX + duration); \
}
SET_DATE(sys)
SET_DATE(prog)
SET_DATE(orig)
#undef SET_DATE
uref_clock_set_dts_pts_delay(upipe_telxf->next_uref, 0);
if (drift_rate.den)
uref_clock_set_rate(upipe_telxf->next_uref, drift_rate);
upipe_telxf_output(upipe, upipe_telxf->next_uref, upump_p);
upipe_telxf_work_err:
upipe_telxf->next_uref = NULL;
upipe_telxf->next_uref_size = 0;
}
/** @internal @This parses A/52 Annex E header.
*
* @param upipe description structure of the pipe
* @return false in case the header is inconsistent
*/
static bool upipe_a52f_parse_a52e(struct upipe *upipe)
{
struct upipe_a52f *upipe_a52f = upipe_a52f_from_upipe(upipe);
uint8_t header[A52_SYNCINFO_SIZE];
if (unlikely(!ubase_check(uref_block_extract(upipe_a52f->next_uref, 0,
sizeof(header), header))))
return true; /* not enough data */
if (likely(a52e_sync_compare_formats(header, upipe_a52f->sync_header))) {
/* identical sync */
upipe_a52f->next_frame_size =
a52e_get_frame_size(a52e_get_frmsiz(header));
return true;
}
/* sample rate */
uint64_t samplerate;
switch (a52e_get_fscod(header)) {
case A52_FSCOD_48KHZ:
samplerate = 48000;
break;
case A52_FSCOD_441KHZ:
samplerate = 44100;
break;
case A52_FSCOD_32KHZ:
samplerate = 32000;
break;
case A52_FSCOD_RESERVED:
switch (a52e_get_fscod2(header)) {
case A52E_FSCOD2_24KHZ:
samplerate = 24000;
break;
case A52E_FSCOD2_2205KHZ:
samplerate = 22050;
break;
case A52E_FSCOD2_16KHZ:
samplerate = 16000;
break;
default:
upipe_warn(upipe, "reserved fscod2");
return false;
}
break;
default: /* never reached */
return false;
}
/* frame size */
upipe_a52f->next_frame_size = a52e_get_frame_size(a52e_get_frmsiz(header));
/* channels */
int acmod = a52e_get_acmod(header);
int channels = acmod_chans[acmod].nfchans + a52e_get_lfeon(header);
uint64_t octetrate =
(upipe_a52f->next_frame_size * samplerate + A52_FRAME_SAMPLES - 1) /
A52_FRAME_SAMPLES;
memcpy(upipe_a52f->sync_header, header, A52_SYNCINFO_SIZE);
upipe_a52f->samplerate = samplerate;
struct uref *flow_def = upipe_a52f_alloc_flow_def_attr(upipe);
if (unlikely(!flow_def)) {
upipe_throw_fatal(upipe, UBASE_ERR_ALLOC);
return false;
}
UBASE_FATAL(upipe, uref_flow_set_complete(flow_def))
UBASE_FATAL(upipe, uref_flow_set_def(flow_def, "block.eac3.sound."))
UBASE_FATAL(upipe, uref_sound_flow_set_samples(flow_def, A52_FRAME_SAMPLES))
UBASE_FATAL(upipe, uref_sound_flow_set_rate(flow_def, samplerate))
UBASE_FATAL(upipe, uref_sound_flow_set_channels(flow_def, channels))
UBASE_FATAL(upipe, uref_clock_set_latency(flow_def,
upipe_a52f->input_latency +
UCLOCK_FREQ * A52_FRAME_SAMPLES / samplerate))
UBASE_FATAL(upipe, uref_block_flow_set_octetrate(flow_def, octetrate))
flow_def = upipe_a52f_store_flow_def_attr(upipe, flow_def);
if (unlikely(!flow_def)) {
upipe_throw_fatal(upipe, UBASE_ERR_ALLOC);
return false;
}
upipe_a52f_store_flow_def(upipe, flow_def);
return true;
}
