Define atomic call video bitrate range with 300–4000 kbps defaults

src/call/call_video_rate.c

@@ -1,10 +1,27 @@
 #include "call_video_rate.h"
 #include "../../lib/debug_config.h"
 #include <string.h>
+#include <stdlib.h>
 
 #define WINDOW_US 500000u
 #define MAX_BITRATE 100000000u
 
+/* Обе границы проверяются до записи: частично применённого диапазона не бывает. */
+int call_video_rate_parse_range(const char *text, uint32_t *minimum_bps, uint32_t *maximum_bps) {
+    char *end = NULL;
+    if (!text || !minimum_bps || !maximum_bps || *text < '0' || *text > '9') goto invalid;
+    unsigned long minimum = strtoul(text, &end, 10);
+    if (*end != ':' || end[1] < '0' || end[1] > '9') goto invalid;
+    unsigned long maximum = strtoul(end + 1, &end, 10);
+    if (*end || minimum < CALL_VIDEO_RATE_MIN_BPS / 1000 || minimum > maximum
+        || maximum > CALL_VIDEO_RATE_MAX_BPS / 1000) goto invalid;
+    *minimum_bps = (uint32_t)minimum * 1000; *maximum_bps = (uint32_t)maximum * 1000;
+    return 0;
+invalid:
+    DEBUG_ERROR(DEBUG_CATEGORY_CALL, "video bitrate range invalid value='%s' expected=300..4000 min:max", text ? text : "(null)");
+    return -1;
+}
+
 void call_video_rate_init(struct call_video_rate *rate, uint64_t now_us) {
     if (!rate) { DEBUG_ERROR(DEBUG_CATEGORY_CALL, "video rate init without state"); return; }
     memset(rate, 0, sizeof(*rate));

src/call/call_video_rate.h

@@ -5,6 +5,9 @@
 #ifndef CALL_VIDEO_RATE_H
 #define CALL_VIDEO_RATE_H
 #include <stdint.h>
+#define CALL_VIDEO_RATE_MIN_BPS 300000u
+#define CALL_VIDEO_RATE_MAX_BPS 4000000u
+#define CALL_VIDEO_RATE_DEFAULT_RANGE "300:4000"
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -37,6 +40,9 @@ struct call_video_rate {
 };
 
 void call_video_rate_init(struct call_video_rate *rate, uint64_t now_us);
+/* Атомарная настройка min:max в десятичных кбит/с, 300 <= min <= max <= 4000.
+ * На ошибке выходные значения не меняются; результат 0/-1. */
+int call_video_rate_parse_range(const char *text, uint32_t *minimum_bps, uint32_t *maximum_bps);
 /* 0 — результат получен, -1 — недопустимый снимок (состояние не меняется).
  * target != applied — рекомендация, не подтверждение применения. Pending запрещает новую команду. */
 int call_video_rate_step(struct call_video_rate *rate, const struct call_video_rate_sample *sample,

src/chat/chat_setting.c

@@ -6,6 +6,7 @@
  */
 
 #include "chat_setting.h"
+#include "../call/call_video_rate.h"
 #include "../utun_instance.h"
 #include "../../lib/debug_config.h"
 
@@ -63,6 +64,7 @@ static const struct chat_setting_def g_setting_defs[] = {
     {"group_autoconnect",          CHAT_SETTING_BOOL, 1,   0, 1},
     {"aec_enabled",                CHAT_SETTING_BOOL, 1,   0, 1},  /* AEC (SpeexDSP) в звонке, desktop GUI */
     {"call_jitter_max_reserve_ms", CHAT_SETTING_INT, 1000, 500, 2000},
+    {"call_video_bitrate_range_kbps", CHAT_SETTING_STRING, 0, 0, 0},
     {"call_compressor_enabled",    CHAT_SETTING_BOOL, 1,   0, 1},
     {"call_compressor_max_gain_db",CHAT_SETTING_INT,  15,  1, 60},
     {"member_files_enabled",       CHAT_SETTING_BOOL, 1,   0, 1},
@@ -111,6 +113,10 @@ int chat_setting_set_state(struct chat_setting_state* s, const char* name, const
     int v;
 
     if (def->type == CHAT_SETTING_STRING) {
+        if (strcmp(name, "call_video_bitrate_range_kbps") == 0) {
+            uint32_t minimum, maximum;
+            if (call_video_rate_parse_range(value, &minimum, &maximum)) return -2;
+        }
         if (strlen(value) >= sizeof(s->string_val[0])) {
             DEBUG_ERROR(CS_ID, "chat_setting: '%s' string too long bytes=%zu limit=%zu", name, strlen(value), sizeof(s->string_val[0]) - 1);
             return -2;
@@ -159,6 +165,12 @@ int chat_setting_set_state(struct chat_setting_state* s, const char* name, const
 }
 
 const char* chat_setting_get_state(const struct chat_setting_state* s, const char* name) {
+    if (s && name && strcmp(name, "call_video_bitrate_range_kbps") == 0) {
+        int idx = chat_setting_find(name);
+        for (int i = 0; s->initialized && i < s->string_count; i++)
+            if (s->string_idx[i] == idx) return s->string_val[i];
+        return CALL_VIDEO_RATE_DEFAULT_RANGE;
+    }
     if (!s || !s->initialized) return NULL;
     int idx = chat_setting_find(name);
     if (idx < 0) return NULL;