compress: Document and sanity-check command line options.

[paraslash.git] / compress_filter.c

diff --git a/compress_filter.c b/compress_filter.c
index 69a982ef5a3aff20a10fcebe468a1af5efd33ba4..d01325960f39d15743affd26b5382e4e31cd1d10 100644 (file)
--- a/compress_filter.c
+++ b/compress_filter.c
@@ -124,7 +124,45 @@ static void compress_open(struct filter_node *fn)
        pcd->max_gain = 1U << (inertia + aggressiveness);
 }
 
+static void *compress_setup(const struct lls_parse_result *lpr)
+{
+       uint32_t val;
+
+       val = U32_OPTVAL(BLOCKSIZE, lpr);
+       if (val == 0 || val > 31) {
+               PARA_EMERG_LOG("blocksize (%u) out of range\n", val);
+               exit(EXIT_FAILURE);
+       }
+       val = U32_OPTVAL(AGGRESSIVENESS, lpr);
+       if (val == 0 || val > 15) {
+               PARA_EMERG_LOG("aggressiveness (%u) out of range\n", val);
+               exit(EXIT_FAILURE);
+       }
+       val = U32_OPTVAL(INERTIA, lpr);
+       if (val == 0 || val > 15) {
+               PARA_EMERG_LOG("inertia (%u) out of range\n", val);
+               exit(EXIT_FAILURE);
+       }
+       val = U32_OPTVAL(AGGRESSIVENESS, lpr) + U32_OPTVAL(INERTIA, lpr);
+       if (val > 16) {
+               PARA_EMERG_LOG("inertia + aggressiveness (%u) > 16\n", val);
+               exit(EXIT_FAILURE);
+       }
+       val = U32_OPTVAL(TARGET_LEVEL, lpr);
+       if (val > 32767) {
+               PARA_EMERG_LOG("target-level (%u) out of range\n", val);
+               exit(EXIT_FAILURE);
+       }
+       val = U32_OPTVAL(DAMP, lpr);
+       if (val > 16) {
+               PARA_EMERG_LOG("damp (%u) out of range\n", val);
+               exit(EXIT_FAILURE);
+       }
+       return NULL; /* no need for a config structure */
+}
+
 const struct filter lsg_filter_cmd_com_compress_user_data = {
+       .setup = compress_setup,
        .open = compress_open,
        .close = compress_close,
        .pre_select = generic_filter_pre_select,