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media: vidtv: cleanup PAT write function

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Avoid initializing the structs multiple times and pass the
PAT struct as a pointer, instead of a var.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2020-11-24 09:45:49 +01:00
parent c570fb9ffc
commit 7f95751519
3 changed files with 32 additions and 29 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/media/test-drivers/vidtv/vidtv_mux.c
View file

@ -173,7 +173,7 @@ static u32 vidtv_mux_push_si(struct vidtv_mux *m)
pat_args.offset = m->mux_buf_offset;
pat_args.continuity_counter = &pat_ctx->cc;
m->mux_buf_offset += vidtv_psi_pat_write_into(pat_args);
m->mux_buf_offset += vidtv_psi_pat_write_into(&pat_args);
for (i = 0; i < m->si.pat->num_pmt; ++i) {
pmt_pid = vidtv_psi_pmt_get_pid(m->si.pmt_secs[i],

57
drivers/media/test-drivers/vidtv/vidtv_psi.c
View file

@ -961,57 +961,60 @@ struct vidtv_psi_table_pat *vidtv_psi_pat_table_init(u16 transport_stream_id)
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)
{
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 = {};
const u16 pat_pid = VIDTV_PAT_PID;
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;
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);
/* 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);
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);

2
drivers/media/test-drivers/vidtv/vidtv_psi.h
View file

@ -556,7 +556,7 @@ struct vidtv_psi_pat_write_args {
* equal to the size of the PAT, since more space is needed for TS headers during TS
* encapsulation.
*/
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);
/**
* struct vidtv_psi_sdt_write_args - Arguments for writing a SDT table