+int pa_format_info_to_sample_spec2(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map, pa_sample_spec *fallback_ss,
+ pa_channel_map *fallback_map) {
+ int r, r2;
+ pa_sample_spec ss_local;
+ pa_channel_map map_local;
+
+ pa_assert(f);
+ pa_assert(ss);
+ pa_assert(map);
+ pa_assert(fallback_ss);
+ pa_assert(fallback_map);
+
+ if (!pa_format_info_is_pcm(f))
+ return pa_format_info_to_sample_spec_fake(f, ss, map);
+
+ r = pa_format_info_get_sample_format(f, &ss_local.format);
+ if (r == -PA_ERR_NOENTITY)
+ ss_local.format = fallback_ss->format;
+ else if (r < 0)
+ return r;
+
+ pa_assert(pa_sample_format_valid(ss_local.format));
+
+ r = pa_format_info_get_rate(f, &ss_local.rate);
+ if (r == -PA_ERR_NOENTITY)
+ ss_local.rate = fallback_ss->rate;
+ else if (r < 0)
+ return r;
+
+ pa_assert(pa_sample_rate_valid(ss_local.rate));
+
+ r = pa_format_info_get_channels(f, &ss_local.channels);
+ r2 = pa_format_info_get_channel_map(f, &map_local);
+ if (r == -PA_ERR_NOENTITY && r2 >= 0)
+ ss_local.channels = map_local.channels;
+ else if (r == -PA_ERR_NOENTITY)
+ ss_local.channels = fallback_ss->channels;
+ else if (r < 0)
+ return r;
+
+ pa_assert(pa_channels_valid(ss_local.channels));
+
+ if (r2 >= 0 && map_local.channels != ss_local.channels) {
+ pa_log_debug("Channel map is not compatible with the sample spec.");
+ return -PA_ERR_INVALID;
+ }
+
+ if (r2 == -PA_ERR_NOENTITY) {
+ if (fallback_map->channels == ss_local.channels)
+ map_local = *fallback_map;
+ else
+ pa_channel_map_init_extend(&map_local, ss_local.channels, PA_CHANNEL_MAP_DEFAULT);
+ } else if (r2 < 0)
+ return r2;
+
+ pa_assert(pa_channel_map_valid(&map_local));
+ pa_assert(ss_local.channels == map_local.channels);
+
+ *ss = ss_local;
+ *map = map_local;
+
+ return 0;
+}
+