bool
audio_check_sample_format(enum sample_format sample_format, GError **error_r)
{
if (!audio_valid_sample_format(sample_format)) {
g_set_error(error_r, audio_format_quark(), 0,
"Invalid sample format: %u", sample_format);
return false;
}
return true;
}
bool
audio_check_channel_count(unsigned channels, GError **error_r)
{
if (!audio_valid_channel_count(channels)) {
g_set_error(error_r, audio_format_quark(), 0,
"Invalid channel count: %u", channels);
return false;
}
return true;
}
bool
audio_check_sample_rate(unsigned long sample_rate, GError **error_r)
{
if (!audio_valid_sample_rate(sample_rate)) {
g_set_error(error_r, audio_format_quark(), 0,
"Invalid sample rate: %lu", sample_rate);
return false;
}
return true;
}
/**
* Parse the "routes" section, a string on the form
* a>b, c>d, e>f, ...
* where a... are non-unique, non-negative integers
* and input channel a gets copied to output channel b, etc.
* @param param the configuration block to read
* @param filter a route_filter whose min_channels and sources[] to set
* @return true on success, false on error
*/
static bool
route_filter_parse(const struct config_param *param,
struct route_filter *filter,
GError **error_r) {
/* TODO:
* With a more clever way of marking "don't copy to output N",
* This could easily be merged into a single loop with some
* dynamic g_realloc() instead of one count run and one g_malloc().
*/
gchar **tokens;
int number_of_copies;
// A cowardly default, just passthrough stereo
const char *routes =
config_get_block_string(param, "routes", "0>0, 1>1");
filter->min_input_channels = 0;
filter->min_output_channels = 0;
tokens = g_strsplit(routes, ",", 255);
number_of_copies = g_strv_length(tokens);
// Start by figuring out a few basic things about the routing set
for (int c=0; c<number_of_copies; ++c) {
// String and int representations of the source/destination
gchar **sd;
int source, dest;
// Squeeze whitespace
g_strstrip(tokens[c]);
// Split the a>b string into source and destination
sd = g_strsplit(tokens[c], ">", 2);
if (g_strv_length(sd) != 2) {
g_set_error(error_r, config_quark(), 1,
"Invalid copy around %d in routes spec: %s",
param->line, tokens[c]);
g_strfreev(sd);
g_strfreev(tokens);
return false;
}
source = strtol(sd[0], NULL, 10);
dest = strtol(sd[1], NULL, 10);
// Keep track of the highest channel numbers seen
// as either in- or outputs
if (source >= filter->min_input_channels)
filter->min_input_channels = source + 1;
if (dest >= filter->min_output_channels)
filter->min_output_channels = dest + 1;
g_strfreev(sd);
}
if (!audio_valid_channel_count(filter->min_output_channels)) {
g_strfreev(tokens);
g_set_error(error_r, audio_format_quark(), 0,
"Invalid number of output channels requested: %d",
filter->min_output_channels);
return false;
}
// Allocate a map of "copy nothing to me"
filter->sources =
g_malloc(filter->min_output_channels * sizeof(signed char));
for (int i=0; i<filter->min_output_channels; ++i)
filter->sources[i] = -1;
// Run through the spec again, and save the
// actual mapping output <- input
for (int c=0; c<number_of_copies; ++c) {
// String and int representations of the source/destination
gchar **sd;
int source, dest;
// Split the a>b string into source and destination
sd = g_strsplit(tokens[c], ">", 2);
if (g_strv_length(sd) != 2) {
g_set_error(error_r, config_quark(), 1,
"Invalid copy around %d in routes spec: %s",
param->line, tokens[c]);
g_strfreev(sd);
g_strfreev(tokens);
return false;
}
source = strtol(sd[0], NULL, 10);
dest = strtol(sd[1], NULL, 10);
filter->sources[dest] = source;
g_strfreev(sd);
}
g_strfreev(tokens);
return true;
}
