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/*
* Copyright (c) 2011-2012 - Mauro Carvalho Chehab
* Copyright (c) 2012-2014 - Andre Roth <neolynx@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation version 2.1 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
*/
#include <libdvbv5/pmt.h>
#include <libdvbv5/descriptors.h>
#include <libdvbv5/dvb-fe.h>
#include <string.h> /* memcpy */
#if __GNUC__ >= 9
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif
ssize_t dvb_table_pmt_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
ssize_t buflen, struct dvb_table_pmt **table)
{
const uint8_t *p = buf, *endbuf = buf + buflen;
struct dvb_table_pmt *pmt;
struct dvb_table_pmt_stream **head;
struct dvb_desc **head_desc;
size_t size;
size = offsetof(struct dvb_table_pmt, dvb_pmt_field_last);
if (p + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - p, size);
return -1;
}
if (buf[0] != DVB_TABLE_PMT) {
dvb_logerr("%s: invalid marker 0x%02x, should be 0x%02x",
__func__, buf[0], DVB_TABLE_PMT);
return -2;
}
if (!*table) {
*table = calloc(sizeof(struct dvb_table_pmt), 1);
if (!*table) {
dvb_logerr("%s: out of memory", __func__);
return -3;
}
}
pmt = *table;
memcpy(pmt, p, size);
p += size;
dvb_table_header_init(&pmt->header);
bswap16(pmt->bitfield);
bswap16(pmt->bitfield2);
/* find end of current list */
head = &pmt->stream;
while (*head != NULL)
head = &(*head)->next;
head_desc = &pmt->descriptor;
while (*head_desc != NULL)
head_desc = &(*head_desc)->next;
size = pmt->header.section_length + 3 - DVB_CRC_SIZE; /* plus header, minus CRC */
if (buf + size > endbuf) {
dvb_logerr("%s: short read %zd/%zd bytes", __func__,
endbuf - buf, size);
return -4;
}
endbuf = buf + size;
/* parse the descriptors */
if (pmt->desc_length > 0 ) {
uint16_t desc_length = pmt->desc_length;
if (p + desc_length > endbuf) {
dvb_logwarn("%s: descriptors short read %d/%zd bytes", __func__,
desc_length, endbuf - p);
desc_length = endbuf - p;
}
if (dvb_desc_parse(parms, p, desc_length,
head_desc) != 0) {
return -4;
}
p += desc_length;
}
/* get the stream entries */
size = offsetof(struct dvb_table_pmt_stream, descriptor);
while (p + size <= endbuf) {
struct dvb_table_pmt_stream *stream;
stream = malloc(sizeof(struct dvb_table_pmt_stream));
if (!stream) {
dvb_logerr("%s: out of memory", __func__);
return -5;
}
memcpy(stream, p, size);
p += size;
bswap16(stream->bitfield);
bswap16(stream->bitfield2);
stream->descriptor = NULL;
stream->next = NULL;
*head = stream;
head = &(*head)->next;
/* parse the descriptors */
if (stream->desc_length > 0) {
uint16_t desc_length = stream->desc_length;
if (p + desc_length > endbuf) {
dvb_logwarn("%s: descriptors short read %zd/%d bytes", __func__,
endbuf - p, desc_length);
desc_length = endbuf - p;
}
if (dvb_desc_parse(parms, p, desc_length,
&stream->descriptor) != 0) {
return -6;
}
p += desc_length;
}
}
if (p < endbuf)
dvb_logwarn("%s: %zu spurious bytes at the end",
__func__, endbuf - p);
return p - buf;
}
void dvb_table_pmt_free(struct dvb_table_pmt *pmt)
{
struct dvb_table_pmt_stream *stream = pmt->stream;
while(stream) {
dvb_desc_free((struct dvb_desc **) &stream->descriptor);
struct dvb_table_pmt_stream *tmp = stream;
stream = stream->next;
free(tmp);
}
dvb_desc_free(&pmt->descriptor);
free(pmt);
}
void dvb_table_pmt_print(struct dvb_v5_fe_parms *parms, const struct dvb_table_pmt *pmt)
{
dvb_loginfo("PMT");
dvb_table_header_print(parms, &pmt->header);
dvb_loginfo("|- pcr_pid %04x", pmt->pcr_pid);
dvb_loginfo("| reserved2 %d", pmt->reserved2);
dvb_loginfo("| descriptor length %d", pmt->desc_length);
dvb_loginfo("| zero3 %d", pmt->zero3);
dvb_loginfo("| reserved3 %d", pmt->reserved3);
dvb_desc_print(parms, pmt->descriptor);
dvb_loginfo("|\\");
const struct dvb_table_pmt_stream *stream = pmt->stream;
uint16_t streams = 0;
while(stream) {
dvb_loginfo("|- stream 0x%04x: %s (%x)", stream->elementary_pid,
pmt_stream_name[stream->type], stream->type);
dvb_loginfo("| descriptor length %d", stream->desc_length);
dvb_desc_print(parms, stream->descriptor);
stream = stream->next;
streams++;
}
dvb_loginfo("|_ %d streams", streams);
}
const char *pmt_stream_name[] = {
[0x00 ... 0x7f] = "Reserved",
[0x80 ... 0xff] = "User Private",
[stream_video] = "Video ISO/IEC 11172",
[stream_video_h262] = "Video ISO/IEC 13818-2",
[stream_audio] = "Audio ISO/IEC 11172",
[stream_audio_13818_3] = "Audio ISO/IEC 13818-3",
[stream_private_sections] = "ISO/IEC 13818-1 Private Sections",
[stream_private_data] = "ISO/IEC 13818-1 Private Data",
[stream_mheg] = "ISO/IEC 13522 MHEG",
[stream_h222] = "ISO/IEC 13818-1 Annex A DSM-CC",
[stream_h222_1] = "ITU-T Rec. H.222.1",
[stream_13818_6_A] = "ISO/IEC 13818-6 type A",
[stream_13818_6_B] = "ISO/IEC 13818-6 type B",
[stream_13818_6_C] = "ISO/IEC 13818-6 type C",
[stream_13818_6_D] = "ISO/IEC 13818-6 type D",
[stream_h222_aux] = "ISO/IEC 13818-1 auxiliary",
[stream_audio_adts] = "Audio ISO/IEC 13818-7 ADTS",
[stream_video_14496_2] = "Video ISO/IEC 14496-2",
[stream_audio_latm] = "Audio ISO/IEC 14496-3 LATM",
[stream_14496_1_pes] = "ISO/IEC 14496-1 PES",
[stream_14496_1_iso] = "ISO/IEC 14496-1 ISO",
[stream_download] = "ISO/IEC 13818-6 Synchronized Download Protocol",
[stream_video_h264] = "H264",
[stream_audio_14496_3] = "ISO/IEC 14496-3 Audio",
[stream_video_hevc] = "HEVC",
[stream_video_cavs] = "CAVS (Chinese AVS)",
[stream_video_moto] = "MPEG-2 MOTO video",
[stream_audio_a52] = "A52",
[stream_scte_27] = "SCTE-27 (sub)",
[stream_audio_sdds] = "SDDS",
[stream_audio_dts_hdmv] = "DTS",
[stream_audio_e_ac3] = "E-AC3, ATSC",
[stream_audio_dts] = "DTS",
[stream_audio_a52_vls] = "A52 vls",
[stream_spu_vls] = "DVD_SPU vls",
[stream_audio_sdds2] = "SDDS",
};
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