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axfer: enable each backend to print own help

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This commit adds an operation for xfer backend to print help text.
In this time, content of the help is not implemented yet.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2018-12-07 18:41:02 +09:00 committed by Takashi Iwai
parent 908ff69be2
commit 97fe7b550c
5 changed files with 25 additions and 0 deletions
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6
axfer/xfer-libasound.c
View file

@ -880,6 +880,11 @@ static void xfer_libasound_destroy(struct xfer_context *xfer)
state->log = NULL;
}
static void xfer_libasound_help(struct xfer_context *xfer)
{
printf(" (placeholder)\n");
}
const struct xfer_data xfer_libasound = {
.s_opts = S_OPTS,
.l_opts = l_opts,
@ -893,6 +898,7 @@ const struct xfer_data xfer_libasound = {
.pause = xfer_libasound_pause,
.post_process = xfer_libasound_post_process,
.destroy = xfer_libasound_destroy,
.help = xfer_libasound_help,
},
.private_size = sizeof(struct libasound_state),
};

6
axfer/xfer-libffado.c
View file

@ -537,6 +537,11 @@ static void xfer_libffado_destroy(struct xfer_context *xfer)
state->guid_literal = NULL;
}
static void xfer_libffado_help(struct xfer_context *xfer)
{
printf(" (placeholder)\n");
}
const struct xfer_data xfer_libffado = {
.s_opts = S_OPTS,
.l_opts = l_opts,
@ -550,6 +555,7 @@ const struct xfer_data xfer_libffado = {
.pause = xfer_libffado_pause,
.post_process = xfer_libffado_post_process,
.destroy = xfer_libffado_destroy,
.help = xfer_libffado_help,
},
.private_size = sizeof(struct libffado_state),
};

6
axfer/xfer-options.c
View file

@ -373,6 +373,12 @@ int xfer_options_parse_args(struct xfer_context *xfer,
if (xfer->help) {
print_help();
if (xfer->ops->help) {
printf("\n");
printf(" BACKEND-OPTIONS (%s) =\n",
xfer_label_from_type(xfer->type));
xfer->ops->help(xfer);
}
return 0;
}

5
axfer/xfer.c
View file

@ -30,6 +30,11 @@ enum xfer_type xfer_type_from_label(const char *label)
return XFER_TYPE_UNSUPPORTED;
}
const char *xfer_label_from_type(enum xfer_type type)
{
return xfer_type_labels[type];
}
int xfer_context_init(struct xfer_context *xfer, enum xfer_type type,
snd_pcm_stream_t direction, int argc, char *const *argv)
{

2
axfer/xfer.h
View file

@ -53,6 +53,7 @@ struct xfer_context {
};
enum xfer_type xfer_type_from_label(const char *label);
const char *xfer_label_from_type(enum xfer_type type);
int xfer_context_init(struct xfer_context *xfer, enum xfer_type type,
snd_pcm_stream_t direction, int argc, char *const *argv);
@ -96,6 +97,7 @@ struct xfer_ops {
void (*post_process)(struct xfer_context *xfer);
void (*destroy)(struct xfer_context *xfer);
void (*pause)(struct xfer_context *xfer, bool enable);
void (*help)(struct xfer_context *xfer);
};
struct xfer_data {