diff options
Diffstat (limited to 'drivers/media/test-drivers/vidtv/vidtv_psi.c')
| -rw-r--r-- | drivers/media/test-drivers/vidtv/vidtv_psi.c | 1521 |
1 files changed, 1112 insertions, 409 deletions
diff --git a/drivers/media/test-drivers/vidtv/vidtv_psi.c b/drivers/media/test-drivers/vidtv/vidtv_psi.c index 82cf67dd27c0..4511a2a98405 100644 --- a/drivers/media/test-drivers/vidtv/vidtv_psi.c +++ b/drivers/media/test-drivers/vidtv/vidtv_psi.c @@ -6,31 +6,31 @@ * technically be broken into one or more sections, we do not do this here, * hence 'table' and 'section' are interchangeable for vidtv. * - * This code currently supports three tables: PAT, PMT and SDT. These are the - * bare minimum to get userspace to recognize our MPEG transport stream. It can - * be extended to support more PSI tables in the future. - * * Copyright (C) 2020 Daniel W. S. Almeida */ #define pr_fmt(fmt) KBUILD_MODNAME ":%s, %d: " fmt, __func__, __LINE__ -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/slab.h> +#include <linux/bcd.h> #include <linux/crc32.h> -#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/ktime.h> #include <linux/printk.h> #include <linux/ratelimit.h> +#include <linux/slab.h> #include <linux/string.h> -#include <asm/byteorder.h> +#include <linux/string.h> +#include <linux/time.h> +#include <linux/types.h> -#include "vidtv_psi.h" #include "vidtv_common.h" +#include "vidtv_psi.h" #include "vidtv_ts.h" #define CRC_SIZE_IN_BYTES 4 #define MAX_VERSION_NUM 32 +#define INITIAL_CRC 0xffffffff +#define ISO_LANGUAGE_CODE_LEN 3 static const u32 CRC_LUT[256] = { /* from libdvbv5 */ @@ -79,7 +79,7 @@ static const u32 CRC_LUT[256] = { 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4 }; -static inline u32 dvb_crc32(u32 crc, u8 *data, u32 len) +static u32 dvb_crc32(u32 crc, u8 *data, u32 len) { /* from libdvbv5 */ while (len--) @@ -92,40 +92,7 @@ static void vidtv_psi_update_version_num(struct vidtv_psi_table_header *h) h->version++; } -static inline u16 vidtv_psi_sdt_serv_get_desc_loop_len(struct vidtv_psi_table_sdt_service *s) -{ - u16 mask; - u16 ret; - - mask = GENMASK(11, 0); - - ret = be16_to_cpu(s->bitfield) & mask; - return ret; -} - -static inline u16 vidtv_psi_pmt_stream_get_desc_loop_len(struct vidtv_psi_table_pmt_stream *s) -{ - u16 mask; - u16 ret; - - mask = GENMASK(9, 0); - - ret = be16_to_cpu(s->bitfield2) & mask; - return ret; -} - -static inline u16 vidtv_psi_pmt_get_desc_loop_len(struct vidtv_psi_table_pmt *p) -{ - u16 mask; - u16 ret; - - mask = GENMASK(9, 0); - - ret = be16_to_cpu(p->bitfield2) & mask; - return ret; -} - -static inline u16 vidtv_psi_get_sec_len(struct vidtv_psi_table_header *h) +static u16 vidtv_psi_get_sec_len(struct vidtv_psi_table_header *h) { u16 mask; u16 ret; @@ -136,7 +103,7 @@ static inline u16 vidtv_psi_get_sec_len(struct vidtv_psi_table_header *h) return ret; } -inline u16 vidtv_psi_get_pat_program_pid(struct vidtv_psi_table_pat_program *p) +u16 vidtv_psi_get_pat_program_pid(struct vidtv_psi_table_pat_program *p) { u16 mask; u16 ret; @@ -147,7 +114,7 @@ inline u16 vidtv_psi_get_pat_program_pid(struct vidtv_psi_table_pat_program *p) return ret; } -inline u16 vidtv_psi_pmt_stream_get_elem_pid(struct vidtv_psi_table_pmt_stream *s) +u16 vidtv_psi_pmt_stream_get_elem_pid(struct vidtv_psi_table_pmt_stream *s) { u16 mask; u16 ret; @@ -158,10 +125,11 @@ inline u16 vidtv_psi_pmt_stream_get_elem_pid(struct vidtv_psi_table_pmt_stream * return ret; } -static inline void vidtv_psi_set_desc_loop_len(__be16 *bitfield, u16 new_len, u8 desc_len_nbits) +static void vidtv_psi_set_desc_loop_len(__be16 *bitfield, u16 new_len, + u8 desc_len_nbits) { - u16 mask; __be16 new; + u16 mask; mask = GENMASK(15, desc_len_nbits); @@ -188,90 +156,81 @@ static void vidtv_psi_set_sec_len(struct vidtv_psi_table_header *h, u16 new_len) h->bitfield = new; } -static u32 vidtv_psi_ts_psi_write_into(struct psi_write_args args) +/* + * Packetize PSI sections into TS packets: + * push a TS header (4bytes) every 184 bytes + * manage the continuity_counter + * add stuffing (i.e. padding bytes) after the CRC + */ +static u32 vidtv_psi_ts_psi_write_into(struct psi_write_args *args) { - /* - * Packetize PSI sections into TS packets: - * push a TS header (4bytes) every 184 bytes - * manage the continuity_counter - * add stuffing (i.e. padding bytes) after the CRC - */ - - u32 nbytes_past_boundary = (args.dest_offset % TS_PACKET_LEN); + struct vidtv_mpeg_ts ts_header = { + .sync_byte = TS_SYNC_BYTE, + .bitfield = cpu_to_be16((args->new_psi_section << 14) | args->pid), + .scrambling = 0, + .payload = 1, + .adaptation_field = 0, /* no adaptation field */ + }; + u32 nbytes_past_boundary = (args->dest_offset % TS_PACKET_LEN); bool aligned = (nbytes_past_boundary == 0); - struct vidtv_mpeg_ts ts_header = {}; - - /* number of bytes written by this function */ - u32 nbytes = 0; - /* how much there is left to write */ - u32 remaining_len = args.len; - /* how much we can be written in this packet */ + u32 remaining_len = args->len; u32 payload_write_len = 0; - /* where we are in the source */ u32 payload_offset = 0; + u32 nbytes = 0; - const u16 PAYLOAD_START = args.new_psi_section; - - if (!args.crc && !args.is_crc) + if (!args->crc && !args->is_crc) pr_warn_ratelimited("Missing CRC for chunk\n"); - if (args.crc) - *args.crc = dvb_crc32(*args.crc, args.from, args.len); + if (args->crc) + *args->crc = dvb_crc32(*args->crc, args->from, args->len); - if (args.new_psi_section && !aligned) { + if (args->new_psi_section && !aligned) { pr_warn_ratelimited("Cannot write a new PSI section in a misaligned buffer\n"); /* forcibly align and hope for the best */ - nbytes += vidtv_memset(args.dest_buf, - args.dest_offset + nbytes, - args.dest_buf_sz, + nbytes += vidtv_memset(args->dest_buf, + args->dest_offset + nbytes, + args->dest_buf_sz, TS_FILL_BYTE, TS_PACKET_LEN - nbytes_past_boundary); } while (remaining_len) { - nbytes_past_boundary = (args.dest_offset + nbytes) % TS_PACKET_LEN; + nbytes_past_boundary = (args->dest_offset + nbytes) % TS_PACKET_LEN; aligned = (nbytes_past_boundary == 0); if (aligned) { /* if at a packet boundary, write a new TS header */ - ts_header.sync_byte = TS_SYNC_BYTE; - ts_header.bitfield = cpu_to_be16((PAYLOAD_START << 14) | args.pid); - ts_header.scrambling = 0; - ts_header.continuity_counter = *args.continuity_counter; - ts_header.payload = 1; - /* no adaptation field */ - ts_header.adaptation_field = 0; - - /* copy the header */ - nbytes += vidtv_memcpy(args.dest_buf, - args.dest_offset + nbytes, - args.dest_buf_sz, + ts_header.continuity_counter = *args->continuity_counter; + + nbytes += vidtv_memcpy(args->dest_buf, + args->dest_offset + nbytes, + args->dest_buf_sz, &ts_header, sizeof(ts_header)); /* * This will trigger a discontinuity if the buffer is full, * effectively dropping the packet. */ - vidtv_ts_inc_cc(args.continuity_counter); + vidtv_ts_inc_cc(args->continuity_counter); } /* write the pointer_field in the first byte of the payload */ - if (args.new_psi_section) - nbytes += vidtv_memset(args.dest_buf, - args.dest_offset + nbytes, - args.dest_buf_sz, + if (args->new_psi_section) + nbytes += vidtv_memset(args->dest_buf, + args->dest_offset + nbytes, + args->dest_buf_sz, 0x0, 1); /* write as much of the payload as possible */ - nbytes_past_boundary = (args.dest_offset + nbytes) % TS_PACKET_LEN; + nbytes_past_boundary = (args->dest_offset + nbytes) % TS_PACKET_LEN; payload_write_len = min(TS_PACKET_LEN - nbytes_past_boundary, remaining_len); - nbytes += vidtv_memcpy(args.dest_buf, - args.dest_offset + nbytes, - args.dest_buf_sz, - args.from + payload_offset, + nbytes += vidtv_memcpy(args->dest_buf, + args->dest_offset + nbytes, + args->dest_buf_sz, + args->from + payload_offset, payload_write_len); /* 'payload_write_len' written from a total of 'len' requested*/ @@ -283,37 +242,45 @@ static u32 vidtv_psi_ts_psi_write_into(struct psi_write_args args) * fill the rest of the packet if there is any remaining space unused */ - nbytes_past_boundary = (args.dest_offset + nbytes) % TS_PACKET_LEN; + nbytes_past_boundary = (args->dest_offset + nbytes) % TS_PACKET_LEN; - if (args.is_crc) - nbytes += vidtv_memset(args.dest_buf, - args.dest_offset + nbytes, - args.dest_buf_sz, + if (args->is_crc) + nbytes += vidtv_memset(args->dest_buf, + args->dest_offset + nbytes, + args->dest_buf_sz, TS_FILL_BYTE, TS_PACKET_LEN - nbytes_past_boundary); return nbytes; } -static u32 table_section_crc32_write_into(struct crc32_write_args args) +static u32 table_section_crc32_write_into(struct crc32_write_args *args) { + struct psi_write_args psi_args = { + .dest_buf = args->dest_buf, + .from = &args->crc, + .len = CRC_SIZE_IN_BYTES, + .dest_offset = args->dest_offset, + .pid = args->pid, + .new_psi_section = false, + .continuity_counter = args->continuity_counter, + .is_crc = true, + .dest_buf_sz = args->dest_buf_sz, + }; + /* the CRC is the last entry in the section */ - u32 nbytes = 0; - struct psi_write_args psi_args = {}; - psi_args.dest_buf = args.dest_buf; - psi_args.from = &args.crc; - psi_args.len = CRC_SIZE_IN_BYTES; - psi_args.dest_offset = args.dest_offset; - psi_args.pid = args.pid; - psi_args.new_psi_section = false; - psi_args.continuity_counter = args.continuity_counter; - psi_args.is_crc = true; - psi_args.dest_buf_sz = args.dest_buf_sz; + return vidtv_psi_ts_psi_write_into(&psi_args); +} - nbytes += vidtv_psi_ts_psi_write_into(psi_args); +static void vidtv_psi_desc_chain(struct vidtv_psi_desc *head, struct vidtv_psi_desc *desc) +{ + if (head) { + while (head->next) + head = head->next; - return nbytes; + head->next = desc; + } } struct vidtv_psi_desc_service *vidtv_psi_service_desc_init(struct vidtv_psi_desc *head, @@ -326,6 +293,8 @@ struct vidtv_psi_desc_service *vidtv_psi_service_desc_init(struct vidtv_psi_desc u32 provider_name_len = provider_name ? strlen(provider_name) : 0; desc = kzalloc(sizeof(*desc), GFP_KERNEL); + if (!desc) + return NULL; desc->type = SERVICE_DESCRIPTOR; @@ -347,12 +316,7 @@ struct vidtv_psi_desc_service *vidtv_psi_service_desc_init(struct vidtv_psi_desc if (provider_name && provider_name_len) desc->provider_name = kstrdup(provider_name, GFP_KERNEL); - if (head) { - while (head->next) - head = head->next; - - head->next = (struct vidtv_psi_desc *)desc; - } + vidtv_psi_desc_chain(head, (struct vidtv_psi_desc *)desc); return desc; } @@ -365,6 +329,8 @@ struct vidtv_psi_desc_registration struct vidtv_psi_desc_registration *desc; desc = kzalloc(sizeof(*desc) + sizeof(format_id) + additional_info_len, GFP_KERNEL); + if (!desc) + return NULL; desc->type = REGISTRATION_DESCRIPTOR; @@ -378,44 +344,178 @@ struct vidtv_psi_desc_registration additional_ident_info, additional_info_len); - if (head) { - while (head->next) - head = head->next; + vidtv_psi_desc_chain(head, (struct vidtv_psi_desc *)desc); + return desc; +} - head->next = (struct vidtv_psi_desc *)desc; +struct vidtv_psi_desc_network_name +*vidtv_psi_network_name_desc_init(struct vidtv_psi_desc *head, char *network_name) +{ + u32 network_name_len = network_name ? strlen(network_name) : 0; + struct vidtv_psi_desc_network_name *desc; + + desc = kzalloc(sizeof(*desc), GFP_KERNEL); + if (!desc) + return NULL; + + desc->type = NETWORK_NAME_DESCRIPTOR; + + desc->length = network_name_len; + + if (network_name && network_name_len) + desc->network_name = kstrdup(network_name, GFP_KERNEL); + + vidtv_psi_desc_chain(head, (struct vidtv_psi_desc *)desc); + return desc; +} + +struct vidtv_psi_desc_service_list +*vidtv_psi_service_list_desc_init(struct vidtv_psi_desc *head, + struct vidtv_psi_desc_service_list_entry *entry) +{ + struct vidtv_psi_desc_service_list_entry *curr_e = NULL; + struct vidtv_psi_desc_service_list_entry *head_e = NULL; + struct vidtv_psi_desc_service_list_entry *prev_e = NULL; + struct vidtv_psi_desc_service_list *desc; + u16 length = 0; + + desc = kzalloc(sizeof(*desc), GFP_KERNEL); + if (!desc) + return NULL; + + desc->type = SERVICE_LIST_DESCRIPTOR; + + while (entry) { + curr_e = kzalloc(sizeof(*curr_e), GFP_KERNEL); + if (!curr_e) { + while (head_e) { + curr_e = head_e; + head_e = head_e->next; + kfree(curr_e); + } + kfree(desc); + return NULL; + } + + curr_e->service_id = entry->service_id; + curr_e->service_type = entry->service_type; + + length += sizeof(struct vidtv_psi_desc_service_list_entry) - + sizeof(struct vidtv_psi_desc_service_list_entry *); + + if (!head_e) + head_e = curr_e; + if (prev_e) + prev_e->next = curr_e; + + prev_e = curr_e; + entry = entry->next; } + desc->length = length; + desc->service_list = head_e; + + vidtv_psi_desc_chain(head, (struct vidtv_psi_desc *)desc); + return desc; +} + +struct vidtv_psi_desc_short_event +*vidtv_psi_short_event_desc_init(struct vidtv_psi_desc *head, + char *iso_language_code, + char *event_name, + char *text) +{ + u32 iso_len = iso_language_code ? strlen(iso_language_code) : 0; + u32 event_name_len = event_name ? strlen(event_name) : 0; + struct vidtv_psi_desc_short_event *desc; + u32 text_len = text ? strlen(text) : 0; + + desc = kzalloc(sizeof(*desc), GFP_KERNEL); + if (!desc) + return NULL; + + desc->type = SHORT_EVENT_DESCRIPTOR; + + desc->length = ISO_LANGUAGE_CODE_LEN + + sizeof_field(struct vidtv_psi_desc_short_event, event_name_len) + + event_name_len + + sizeof_field(struct vidtv_psi_desc_short_event, text_len) + + text_len; + + desc->event_name_len = event_name_len; + desc->text_len = text_len; + + if (iso_len != ISO_LANGUAGE_CODE_LEN) + iso_language_code = "eng"; + + desc->iso_language_code = kstrdup(iso_language_code, GFP_KERNEL); + + if (event_name && event_name_len) + desc->event_name = kstrdup(event_name, GFP_KERNEL); + + if (text && text_len) + desc->text = kstrdup(text, GFP_KERNEL); + + vidtv_psi_desc_chain(head, (struct vidtv_psi_desc *)desc); return desc; } struct vidtv_psi_desc *vidtv_psi_desc_clone(struct vidtv_psi_desc *desc) { + struct vidtv_psi_desc_network_name *desc_network_name; + struct vidtv_psi_desc_service_list *desc_service_list; + struct vidtv_psi_desc_short_event *desc_short_event; + struct vidtv_psi_desc_service *service; struct vidtv_psi_desc *head = NULL; struct vidtv_psi_desc *prev = NULL; struct vidtv_psi_desc *curr = NULL; - struct vidtv_psi_desc_service *service; - while (desc) { switch (desc->type) { case SERVICE_DESCRIPTOR: service = (struct vidtv_psi_desc_service *)desc; curr = (struct vidtv_psi_desc *) - vidtv_psi_service_desc_init(head, - service->service_type, - service->service_name, - service->provider_name); + vidtv_psi_service_desc_init(head, + service->service_type, + service->service_name, + service->provider_name); + break; + + case NETWORK_NAME_DESCRIPTOR: + desc_network_name = (struct vidtv_psi_desc_network_name *)desc; + curr = (struct vidtv_psi_desc *) + vidtv_psi_network_name_desc_init(head, + desc_network_name->network_name); + break; + + case SERVICE_LIST_DESCRIPTOR: + desc_service_list = (struct vidtv_psi_desc_service_list *)desc; + curr = (struct vidtv_psi_desc *) + vidtv_psi_service_list_desc_init(head, + desc_service_list->service_list); + break; + + case SHORT_EVENT_DESCRIPTOR: + desc_short_event = (struct vidtv_psi_desc_short_event *)desc; + curr = (struct vidtv_psi_desc *) + vidtv_psi_short_event_desc_init(head, + desc_short_event->iso_language_code, + desc_short_event->event_name, + desc_short_event->text); break; case REGISTRATION_DESCRIPTOR: default: curr = kzalloc(sizeof(*desc) + desc->length, GFP_KERNEL); + if (!curr) + return NULL; memcpy(curr, desc, sizeof(*desc) + desc->length); - break; - } + } - if (curr) - curr->next = NULL; + if (!curr) + return NULL; + + curr->next = NULL; if (!head) head = curr; if (prev) @@ -430,6 +530,8 @@ struct vidtv_psi_desc *vidtv_psi_desc_clone(struct vidtv_psi_desc *desc) void vidtv_psi_desc_destroy(struct vidtv_psi_desc *desc) { + struct vidtv_psi_desc_service_list_entry *sl_entry_tmp = NULL; + struct vidtv_psi_desc_service_list_entry *sl_entry = NULL; struct vidtv_psi_desc *curr = desc; struct vidtv_psi_desc *tmp = NULL; @@ -447,6 +549,25 @@ void vidtv_psi_desc_destroy(struct vidtv_psi_desc *desc) /* nothing to do */ break; + case NETWORK_NAME_DESCRIPTOR: + kfree(((struct vidtv_psi_desc_network_name *)tmp)->network_name); + break; + + case SERVICE_LIST_DESCRIPTOR: + sl_entry = ((struct vidtv_psi_desc_service_list *)tmp)->service_list; + while (sl_entry) { + sl_entry_tmp = sl_entry; + sl_entry = sl_entry->next; + kfree(sl_entry_tmp); + } + break; + + case SHORT_EVENT_DESCRIPTOR: + kfree(((struct vidtv_psi_desc_short_event *)tmp)->iso_language_code); + kfree(((struct vidtv_psi_desc_short_event *)tmp)->event_name); + kfree(((struct vidtv_psi_desc_short_event *)tmp)->text); + break; + default: pr_warn_ratelimited("Possible leak: not handling descriptor type %d\n", tmp->type); @@ -513,63 +634,119 @@ void vidtv_sdt_desc_assign(struct vidtv_psi_table_sdt *sdt, vidtv_psi_update_version_num(&sdt->header); } -static u32 vidtv_psi_desc_write_into(struct desc_write_args args) +static u32 vidtv_psi_desc_write_into(struct desc_write_args *args) { - /* the number of bytes written by this function */ + struct psi_write_args psi_args = { + .dest_buf = args->dest_buf, + .from = &args->desc->type, + .pid = args->pid, + .new_psi_section = false, + .continuity_counter = args->continuity_counter, + .is_crc = false, + .dest_buf_sz = args->dest_buf_sz, + .crc = args->crc, + .len = sizeof_field(struct vidtv_psi_desc, type) + + sizeof_field(struct vidtv_psi_desc, length), + }; + struct vidtv_psi_desc_service_list_entry *serv_list_entry = NULL; u32 nbytes = 0; - struct psi_write_args psi_args = {}; - - psi_args.dest_buf = args.dest_buf; - psi_args.from = &args.desc->type; - psi_args.len = sizeof_field(struct vidtv_psi_desc, type) + - sizeof_field(struct vidtv_psi_desc, length); + psi_args.dest_offset = args->dest_offset + nbytes; - psi_args.dest_offset = args.dest_offset + nbytes; - psi_args.pid = args.pid; - psi_args.new_psi_section = false; - psi_args.continuity_counter = args.continuity_counter; - psi_args.is_crc = false; - psi_args.dest_buf_sz = args.dest_buf_sz; - psi_args.crc = args.crc; + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); - nbytes += vidtv_psi_ts_psi_write_into(psi_args); - - switch (args.desc->type) { + switch (args->desc->type) { case SERVICE_DESCRIPTOR: - psi_args.dest_offset = args.dest_offset + nbytes; + psi_args.dest_offset = args->dest_offset + nbytes; psi_args.len = sizeof_field(struct vidtv_psi_desc_service, service_type) + sizeof_field(struct vidtv_psi_desc_service, provider_name_len); - psi_args.from = &((struct vidtv_psi_desc_service *)args.desc)->service_type; + psi_args.from = &((struct vidtv_psi_desc_service *)args->desc)->service_type; - nbytes += vidtv_psi_ts_psi_write_into(psi_args); + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); - psi_args.dest_offset = args.dest_offset + nbytes; - psi_args.len = ((struct vidtv_psi_desc_service *)args.desc)->provider_name_len; - psi_args.from = ((struct vidtv_psi_desc_service *)args.desc)->provider_name; + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = ((struct vidtv_psi_desc_service *)args->desc)->provider_name_len; + psi_args.from = ((struct vidtv_psi_desc_service *)args->desc)->provider_name; - nbytes += vidtv_psi_ts_psi_write_into(psi_args); + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); - psi_args.dest_offset = args.dest_offset + nbytes; + psi_args.dest_offset = args->dest_offset + nbytes; psi_args.len = sizeof_field(struct vidtv_psi_desc_service, service_name_len); - psi_args.from = &((struct vidtv_psi_desc_service *)args.desc)->service_name_len; + psi_args.from = &((struct vidtv_psi_desc_service *)args->desc)->service_name_len; - nbytes += vidtv_psi_ts_psi_write_into(psi_args); + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); - psi_args.dest_offset = args.dest_offset + nbytes; - psi_args.len = ((struct vidtv_psi_desc_service *)args.desc)->service_name_len; - psi_args.from = ((struct vidtv_psi_desc_service *)args.desc)->service_name; + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = ((struct vidtv_psi_desc_service *)args->desc)->service_name_len; + psi_args.from = ((struct vidtv_psi_desc_service *)args->desc)->service_name; + + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); + break; + + case NETWORK_NAME_DESCRIPTOR: + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = args->desc->length; + psi_args.from = ((struct vidtv_psi_desc_network_name *)args->desc)->network_name; + + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); + break; + + case SERVICE_LIST_DESCRIPTOR: + serv_list_entry = ((struct vidtv_psi_desc_service_list *)args->desc)->service_list; + while (serv_list_entry) { + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = sizeof(struct vidtv_psi_desc_service_list_entry) - + sizeof(struct vidtv_psi_desc_service_list_entry *); + psi_args.from = serv_list_entry; + + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); + + serv_list_entry = serv_list_entry->next; + } + break; + + case SHORT_EVENT_DESCRIPTOR: + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = ISO_LANGUAGE_CODE_LEN; + psi_args.from = ((struct vidtv_psi_desc_short_event *) + args->desc)->iso_language_code; + + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); + + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = sizeof_field(struct vidtv_psi_desc_short_event, event_name_len); + psi_args.from = &((struct vidtv_psi_desc_short_event *) + args->desc)->event_name_len; + + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); + + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = ((struct vidtv_psi_desc_short_event *)args->desc)->event_name_len; + psi_args.from = ((struct vidtv_psi_desc_short_event *)args->desc)->event_name; + + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); + + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = sizeof_field(struct vidtv_psi_desc_short_event, text_len); + psi_args.from = &((struct vidtv_psi_desc_short_event *)args->desc)->text_len; + + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); + + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = ((struct vidtv_psi_desc_short_event *)args->desc)->text_len; + psi_args.from = ((struct vidtv_psi_desc_short_event *)args->desc)->text; + + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); - nbytes += vidtv_psi_ts_psi_write_into(psi_args); break; case REGISTRATION_DESCRIPTOR: default: - psi_args.dest_offset = args.dest_offset + nbytes; - psi_args.len = args.desc->length; - psi_args.from = &args.desc->data; + psi_args.dest_offset = args->dest_offset + nbytes; + psi_args.len = args->desc->length; + psi_args.from = &args->desc->data; - nbytes += vidtv_psi_ts_psi_write_into(psi_args); + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); break; } @@ -577,40 +754,37 @@ static u32 vidtv_psi_desc_write_into(struct desc_write_args args) } static u32 -vidtv_psi_table_header_write_into(struct header_write_args args) +vidtv_psi_table_header_write_into(struct header_write_args *args) { - /* the number of bytes written by this function */ - u32 nbytes = 0; - struct psi_write_args psi_args = {}; - - psi_args.dest_buf = args.dest_buf; - psi_args.from = args.h; - psi_args.len = sizeof(struct vidtv_psi_table_header); - psi_args.dest_offset = args.dest_offset; - psi_args.pid = args.pid; - psi_args.new_psi_section = true; - psi_args.continuity_counter = args.continuity_counter; - psi_args.is_crc = false; - psi_args.dest_buf_sz = args.dest_buf_sz; - psi_args.crc = args.crc; - - nbytes += vidtv_psi_ts_psi_write_into(psi_args); - - return nbytes; + struct psi_write_args psi_args = { + .dest_buf = args->dest_buf, + .from = args->h, + .len = sizeof(struct vidtv_psi_table_header), + .dest_offset = args->dest_offset, + .pid = args->pid, + .new_psi_section = true, + .continuity_counter = args->continuity_counter, + .is_crc = false, + .dest_buf_sz = args->dest_buf_sz, + .crc = args->crc, + }; + + return vidtv_psi_ts_psi_write_into(&psi_args); } void vidtv_psi_pat_table_update_sec_len(struct vidtv_psi_table_pat *pat) { - /* see ISO/IEC 13818-1 : 2000 p.43 */ u16 length = 0; u32 i; + /* see ISO/IEC 13818-1 : 2000 p.43 */ + /* from immediately after 'section_length' until 'last_section_number'*/ length += PAT_LEN_UNTIL_LAST_SECTION_NUMBER; /* do not count the pointer */ - for (i = 0; i < pat->programs; ++i) + for (i = 0; i < pat->num_pat; ++i) length += sizeof(struct vidtv_psi_table_pat_program) - sizeof(struct vidtv_psi_table_pat_program *); @@ -621,10 +795,11 @@ vidtv_psi_pat_table_update_sec_len(struct vidtv_psi_table_pat *pat) void vidtv_psi_pmt_table_update_sec_len(struct vidtv_psi_table_pmt *pmt) { - /* see ISO/IEC 13818-1 : 2000 p.46 */ - u16 length = 0; struct vidtv_psi_table_pmt_stream *s = pmt->stream; u16 desc_loop_len; + u16 length = 0; + + /* see ISO/IEC 13818-1 : 2000 p.46 */ /* from immediately after 'section_length' until 'program_info_length'*/ length += PMT_LEN_UNTIL_PROGRAM_INFO_LENGTH; @@ -655,10 +830,11 @@ void vidtv_psi_pmt_table_update_sec_len(struct vidtv_psi_table_pmt *pmt) void vidtv_psi_sdt_table_update_sec_len(struct vidtv_psi_table_sdt *sdt) { - /* see ETSI EN 300 468 V 1.10.1 p.24 */ - u16 length = 0; struct vidtv_psi_table_sdt_service *s = sdt->service; u16 desc_loop_len; + u16 length = 0; + + /* see ETSI EN 300 468 V 1.10.1 p.24 */ /* * from immediately after 'section_length' until @@ -681,7 +857,6 @@ void vidtv_psi_sdt_table_update_sec_len(struct vidtv_psi_table_sdt *sdt) } length += CRC_SIZE_IN_BYTES; - vidtv_psi_set_sec_len(&sdt->header, length); } @@ -694,6 +869,8 @@ vidtv_psi_pat_program_init(struct vidtv_psi_table_pat_program *head, const u16 RESERVED = 0x07; program = kzalloc(sizeof(*program), GFP_KERNEL); + if (!program) + return NULL; program->service_id = cpu_to_be16(service_id); @@ -714,8 +891,8 @@ vidtv_psi_pat_program_init(struct vidtv_psi_table_pat_program *head, void vidtv_psi_pat_program_destroy(struct vidtv_psi_table_pat_program *p) { - struct vidtv_psi_table_pat_program *curr = p; struct vidtv_psi_table_pat_program *tmp = NULL; + struct vidtv_psi_table_pat_program *curr = p; while (curr) { tmp = curr; @@ -724,42 +901,49 @@ vidtv_psi_pat_program_destroy(struct vidtv_psi_table_pat_program *p) } } +/* This function transfers ownership of p to the table */ void vidtv_psi_pat_program_assign(struct vidtv_psi_table_pat *pat, struct vidtv_psi_table_pat_program *p) { - /* This function transfers ownership of p to the table */ + struct vidtv_psi_table_pat_program *program; + u16 program_count; - u16 program_count = 0; - struct vidtv_psi_table_pat_program *program = p; + do { + program_count = 0; + program = p; - if (p == pat->program) - return; + if (p == pat->program) + return; - while (program) { - ++program_count; - program = program->next; - } + while (program) { + ++program_count; + program = program->next; + } - pat->programs = program_count; - pat->program = p; + pat->num_pat = program_count; + pat->program = p; - /* Recompute section length */ - vidtv_psi_pat_table_update_sec_len(pat); + /* Recompute section length */ + vidtv_psi_pat_table_update_sec_len(pat); - if (vidtv_psi_get_sec_len(&pat->header) > MAX_SECTION_LEN) - vidtv_psi_pat_program_assign(pat, NULL); + p = NULL; + } while (vidtv_psi_get_sec_len(&pat->header) > MAX_SECTION_LEN); vidtv_psi_update_version_num(&pat->header); } struct vidtv_psi_table_pat *vidtv_psi_pat_table_init(u16 transport_stream_id) { - struct vidtv_psi_table_pat *pat = kzalloc(sizeof(*pat), GFP_KERNEL); + struct vidtv_psi_table_pat *pat; const u16 SYNTAX = 0x1; const u16 ZERO = 0x0; const u16 ONES = 0x03; + pat = kzalloc(sizeof(*pat), GFP_KERNEL); + if (!pat) + return NULL; + pat->header.table_id = 0x0; pat->header.bitfield = cpu_to_be16((SYNTAX << 15) | (ZERO << 14) | (ONES << 12)); @@ -772,70 +956,68 @@ struct vidtv_psi_table_pat *vidtv_psi_pat_table_init(u16 transport_stream_id) pat->header.section_id = 0x0; pat->header.last_section = 0x0; - pat->programs = 0; - vidtv_psi_pat_table_update_sec_len(pat); return pat; } -u32 vidtv_psi_pat_write_into(struct vidtv_psi_pat_write_args args) +u32 vidtv_psi_pat_write_into(struct vidtv_psi_pat_write_args *args) { - /* the number of bytes written by this function */ + struct vidtv_psi_table_pat_program *p = args->pat->program; + struct header_write_args h_args = { + .dest_buf = args->buf, + .dest_offset = args->offset, + .pid = VIDTV_PAT_PID, + .h = &args->pat->header, + .continuity_counter = args->continuity_counter, + .dest_buf_sz = args->buf_sz, + }; + struct psi_write_args psi_args = { + .dest_buf = args->buf, + .pid = VIDTV_PAT_PID, + .new_psi_section = false, + .continuity_counter = args->continuity_counter, + .is_crc = false, + .dest_buf_sz = args->buf_sz, + }; + struct crc32_write_args c_args = { + .dest_buf = args->buf, + .pid = VIDTV_PAT_PID, + .dest_buf_sz = args->buf_sz, + }; + u32 crc = INITIAL_CRC; u32 nbytes = 0; - const u16 pat_pid = VIDTV_PAT_PID; - u32 crc = 0xffffffff; - - struct vidtv_psi_table_pat_program *p = args.pat->program; - struct header_write_args h_args = {}; - struct psi_write_args psi_args = {}; - struct crc32_write_args c_args = {}; + vidtv_psi_pat_table_update_sec_len(args->pat); - vidtv_psi_pat_table_update_sec_len(args.pat); - - h_args.dest_buf = args.buf; - h_args.dest_offset = args.offset; - h_args.h = &args.pat->header; - h_args.pid = pat_pid; - h_args.continuity_counter = args.continuity_counter; - h_args.dest_buf_sz = args.buf_sz; h_args.crc = &crc; - nbytes += vidtv_psi_table_header_write_into(h_args); + nbytes += vidtv_psi_table_header_write_into(&h_args); /* note that the field 'u16 programs' is not really part of the PAT */ - psi_args.dest_buf = args.buf; - psi_args.pid = pat_pid; - psi_args.new_psi_section = false; - psi_args.continuity_counter = args.continuity_counter; - psi_args.is_crc = false; - psi_args.dest_buf_sz = args.buf_sz; - psi_args.crc = &crc; + psi_args.crc = &crc; while (p) { /* copy the PAT programs */ psi_args.from = p; /* skip the pointer */ psi_args.len = sizeof(*p) - - sizeof(struct vidtv_psi_table_pat_program *); - psi_args.dest_offset = args.offset + nbytes; + sizeof(struct vidtv_psi_table_pat_program *); + psi_args.dest_offset = args->offset + nbytes; + psi_args.continuity_counter = args->continuity_counter; - nbytes += vidtv_psi_ts_psi_write_into(psi_args); + nbytes += vidtv_psi_ts_psi_write_into(&psi_args); p = p->next; } - c_args.dest_buf = args.buf; - c_args.dest_offset = args.offset + nbytes; + c_args.dest_offset = args->offset + nbytes; + c_args.continuity_counter = args->continuity_counter; c_args.crc = cpu_to_be32(crc); - c_args.pid = pat_pid; - c_args.continuity_counter = args.continuity_counter; - c_args.dest_buf_sz = args.buf_sz; /* Write the CRC32 at the end */ - nbytes += table_section_crc32_write_into(c_args); + nbytes += table_section_crc32_write_into(&c_args); return nbytes; } @@ -859,6 +1041,8 @@ vidtv_psi_pmt_stream_init(struct vidtv_psi_table_pmt_stream *head, u16 desc_loop_len; stream = kzalloc(sizeof(*stream), GFP_KERNEL); + if (!stream) + return NULL; stream->type = stream_type; @@ -883,8 +1067,8 @@ vidtv_psi_pmt_stream_init(struct vidtv_psi_table_pmt_stream *head, void vidtv_psi_pmt_stream_destroy(struct vidtv_psi_table_pmt_stream *s) { - struct vidtv_psi_table_pmt_stream *curr_stream = s; struct vidtv_psi_table_pmt_stream *tmp_stream = NULL; + struct vidtv_psi_table_pmt_stream *curr_stream = s; while (curr_stream) { tmp_stream = curr_stream; @@ -897,15 +1081,16 @@ void vidtv_psi_pmt_stream_destroy(struct vidtv_psi_table_pmt_stream *s) void vidtv_psi_pmt_stream_assign(struct vidtv_psi_table_pmt *pmt, struct vidtv_psi_table_pmt_stream *s) { - /* This function transfers ownership of s to the table */ - if (s == pmt->stream) - return; + do { + /* This function transfers ownership of s to the table */ + if (s == pmt->stream) + return; - pmt->stream = s; - vidtv_psi_pmt_table_update_sec_len(pmt); + pmt->stream = s; + vidtv_psi_pmt_table_update_sec_len(pmt); - if (vidtv_psi_get_sec_len(&pmt->header) > MAX_SECTION_LEN) - vidtv_psi_pmt_stream_assign(pmt, NULL); + s = NULL; + } while (vidtv_psi_get_sec_len(&pmt->header) > MAX_SECTION_LEN); vidtv_psi_update_version_num(&pmt->header); } @@ -933,14 +1118,18 @@ u16 vidtv_psi_pmt_get_pid(struct vidtv_psi_table_pmt *section, struct vidtv_psi_table_pmt *vidtv_psi_pmt_table_init(u16 program_number, u16 pcr_pid) { - struct vidtv_psi_table_pmt *pmt = kzalloc(sizeof(*pmt), GFP_KERNEL); - const u16 SYNTAX = 0x1; - const u16 ZERO = 0x0; - const u16 ONES = 0x03; + struct v |