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media: vidtv: simplify NIT write function

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- pass struct vidtv_psi_nit_write_args as a pointer;
- avoid initializing struct fields multiple times.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2020-11-24 10:37:12 +01:00
parent 6286a4b79b
commit 5a5b9fb1a1
3 changed files with 47 additions and 48 deletions
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2
drivers/media/test-drivers/vidtv/vidtv_mux.c
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@ -204,7 +204,7 @@ static u32 vidtv_mux_push_si(struct vidtv_mux *m)
nit_args.offset = m->mux_buf_offset;
nit_args.continuity_counter = &nit_ctx->cc;
m->mux_buf_offset += vidtv_psi_nit_write_into(nit_args);
m->mux_buf_offset += vidtv_psi_nit_write_into(&nit_args);
eit_args.offset = m->mux_buf_offset;
eit_args.continuity_counter = &eit_ctx->cc;

91
drivers/media/test-drivers/vidtv/vidtv_psi.c
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@ -1647,53 +1647,60 @@ struct vidtv_psi_table_nit
return NULL;
}
u32 vidtv_psi_nit_write_into(struct vidtv_psi_nit_write_args args)
u32 vidtv_psi_nit_write_into(struct vidtv_psi_nit_write_args *args)
{
struct vidtv_psi_desc *table_descriptor = args.nit->descriptor;
struct vidtv_psi_table_transport *transport = args.nit->transport;
struct header_write_args h_args = {
.dest_buf = args->buf,
.dest_offset = args->offset,
.h = &args->nit->header,
.pid = VIDTV_NIT_PID,
.dest_buf_sz = args->buf_sz,
};
struct psi_write_args psi_args = {
.dest_buf = args->buf,
.from = &args->nit->bitfield,
.len = sizeof_field(struct vidtv_psi_table_nit, bitfield),
.pid = VIDTV_NIT_PID,
.new_psi_section = false,
.is_crc = false,
.dest_buf_sz = args->buf_sz,
};
struct desc_write_args d_args = {
.dest_buf = args->buf,
.pid = VIDTV_NIT_PID,
.dest_buf_sz = args->buf_sz,
};
struct crc32_write_args c_args = {
.dest_buf = args->buf,
.pid = VIDTV_NIT_PID,
.dest_buf_sz = args->buf_sz,
};
struct vidtv_psi_desc *table_descriptor = args->nit->descriptor;
struct vidtv_psi_table_transport *transport = args->nit->transport;
struct vidtv_psi_desc *transport_descriptor;
struct header_write_args h_args = {};
struct psi_write_args psi_args = {};
struct desc_write_args d_args = {};
struct crc32_write_args c_args = {};
u32 crc = INITIAL_CRC;
u32 nbytes = 0;
vidtv_psi_nit_table_update_sec_len(args.nit);
vidtv_psi_nit_table_update_sec_len(args->nit);
h_args.dest_buf = args.buf;
h_args.dest_offset = args.offset;
h_args.h = &args.nit->header;
h_args.pid = VIDTV_NIT_PID;
h_args.continuity_counter = args.continuity_counter;
h_args.dest_buf_sz = args.buf_sz;
h_args.continuity_counter = args->continuity_counter;
h_args.crc = &crc;
nbytes += vidtv_psi_table_header_write_into(&h_args);
/* write the bitfield */
psi_args.dest_buf = args.buf;
psi_args.from = &args.nit->bitfield;
psi_args.len = sizeof_field(struct vidtv_psi_table_nit, bitfield);
psi_args.dest_offset = args.offset + nbytes;
psi_args.pid = VIDTV_NIT_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.dest_offset = args->offset + nbytes;
psi_args.continuity_counter = args->continuity_counter;
psi_args.crc = &crc;
nbytes += vidtv_psi_ts_psi_write_into(&psi_args);
while (table_descriptor) {
/* write the descriptors, if any */
d_args.dest_buf = args.buf;
d_args.dest_offset = args.offset + nbytes;
d_args.dest_offset = args->offset + nbytes;
d_args.desc = table_descriptor;
d_args.pid = VIDTV_NIT_PID;
d_args.continuity_counter = args.continuity_counter;
d_args.dest_buf_sz = args.buf_sz;
d_args.continuity_counter = args->continuity_counter;
d_args.crc = &crc;
nbytes += vidtv_psi_desc_write_into(&d_args);
@ -1702,21 +1709,19 @@ u32 vidtv_psi_nit_write_into(struct vidtv_psi_nit_write_args args)
}
/* write the second bitfield */
psi_args.dest_buf = args.buf;
psi_args.from = &args.nit->bitfield2;
psi_args.from = &args->nit->bitfield2;
psi_args.len = sizeof_field(struct vidtv_psi_table_nit, bitfield2);
psi_args.dest_offset = args.offset + nbytes;
psi_args.pid = VIDTV_NIT_PID;
psi_args.dest_offset = args->offset + nbytes;
nbytes += vidtv_psi_ts_psi_write_into(&psi_args);
psi_args.len = sizeof_field(struct vidtv_psi_table_transport, transport_id) +
sizeof_field(struct vidtv_psi_table_transport, network_id) +
sizeof_field(struct vidtv_psi_table_transport, bitfield);
while (transport) {
/* write the transport sections, if any */
psi_args.from = transport;
psi_args.len = sizeof_field(struct vidtv_psi_table_transport, transport_id) +
sizeof_field(struct vidtv_psi_table_transport, network_id) +
sizeof_field(struct vidtv_psi_table_transport, bitfield);
psi_args.dest_offset = args.offset + nbytes;
psi_args.dest_offset = args->offset + nbytes;
nbytes += vidtv_psi_ts_psi_write_into(&psi_args);
@ -1724,12 +1729,9 @@ u32 vidtv_psi_nit_write_into(struct vidtv_psi_nit_write_args args)
while (transport_descriptor) {
/* write the transport descriptors, if any */
d_args.dest_buf = args.buf;
d_args.dest_offset = args.offset + nbytes;
d_args.dest_offset = args->offset + nbytes;
d_args.desc = transport_descriptor;
d_args.pid = VIDTV_NIT_PID;
d_args.continuity_counter = args.continuity_counter;
d_args.dest_buf_sz = args.buf_sz;
d_args.continuity_counter = args->continuity_counter;
d_args.crc = &crc;
nbytes += vidtv_psi_desc_write_into(&d_args);
@ -1740,12 +1742,9 @@ u32 vidtv_psi_nit_write_into(struct vidtv_psi_nit_write_args args)
transport = transport->next;
}
c_args.dest_buf = args.buf;
c_args.dest_offset = args.offset + nbytes;
c_args.dest_offset = args->offset + nbytes;
c_args.crc = cpu_to_be32(crc);
c_args.pid = VIDTV_NIT_PID;
c_args.continuity_counter = args.continuity_counter;
c_args.dest_buf_sz = args.buf_sz;
c_args.continuity_counter = args->continuity_counter;
/* Write the CRC32 at the end */
nbytes += table_section_crc32_write_into(&c_args);

2
drivers/media/test-drivers/vidtv/vidtv_psi.h
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@ -709,7 +709,7 @@ struct vidtv_psi_nit_write_args {
* equal to the size of the NIT, since more space is needed for TS headers during TS
* encapsulation.
*/
u32 vidtv_psi_nit_write_into(struct vidtv_psi_nit_write_args args);
u32 vidtv_psi_nit_write_into(struct vidtv_psi_nit_write_args *args);
void vidtv_psi_nit_table_destroy(struct vidtv_psi_table_nit *nit);