add new paramter ignore_dB= to alsa modules

src/modules/alsa/alsa-sink.c

@@ -1236,7 +1236,7 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
     size_t frame_size;
     snd_pcm_info_t *pcm_info = NULL;
     int err;
-    pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d;
+    pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d, ignore_dB = FALSE;
     pa_usec_t usec;
     pa_sink_new_data data;
 
@@ -1282,6 +1282,11 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
         goto fail;
     }
 
+    if (pa_modargs_get_value_boolean(ma, "ignore_dB", &ignore_dB) < 0) {
+        pa_log("Failed to parse ignore_dB argument.");
+        goto fail;
+    }
+
     if (use_tsched && !pa_rtclock_hrtimer()) {
         pa_log_notice("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
         use_tsched = FALSE;
@@ -1503,8 +1508,8 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
             }
 
             if (suitable) {
-                if (snd_mixer_selem_get_playback_dB_range(u->mixer_elem, &u->hw_dB_min, &u->hw_dB_max) < 0)
+                if (ignore_dB || snd_mixer_selem_get_playback_dB_range(u->mixer_elem, &u->hw_dB_min, &u->hw_dB_max) < 0)
-                    pa_log_info("Mixer doesn't support dB information.");
+                    pa_log_info("Mixer doesn't support dB information or data is ignored.");
                 else {
 #ifdef HAVE_VALGRIND_MEMCHECK_H
                     VALGRIND_MAKE_MEM_DEFINED(&u->hw_dB_min, sizeof(u->hw_dB_min));

src/modules/alsa/alsa-source.c

@@ -1072,7 +1072,7 @@ pa_source *pa_alsa_source_new(pa_module *m, pa_modargs *ma, const char*driver, p
     size_t frame_size;
     snd_pcm_info_t *pcm_info = NULL;
     int err;
-    pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d;
+    pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d, ignore_dB = FALSE;
     pa_source_new_data data;
 
     snd_pcm_info_alloca(&pcm_info);
@@ -1116,6 +1116,11 @@ pa_source *pa_alsa_source_new(pa_module *m, pa_modargs *ma, const char*driver, p
         goto fail;
     }
 
+    if (pa_modargs_get_value_boolean(ma, "ignore_dB", &ignore_dB) < 0) {
+        pa_log("Failed to parse ignore_dB argument.");
+        goto fail;
+    }
+
     if (use_tsched && !pa_rtclock_hrtimer()) {
         pa_log_notice("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
         use_tsched = FALSE;
@@ -1324,8 +1329,8 @@ pa_source *pa_alsa_source_new(pa_module *m, pa_modargs *ma, const char*driver, p
             }
 
             if (suitable) {
-                if (snd_mixer_selem_get_capture_dB_range(u->mixer_elem, &u->hw_dB_min, &u->hw_dB_max) < 0)
+                if (ignore_dB || snd_mixer_selem_get_capture_dB_range(u->mixer_elem, &u->hw_dB_min, &u->hw_dB_max) < 0)
-                    pa_log_info("Mixer doesn't support dB information.");
+                    pa_log_info("Mixer doesn't support dB information or data is ignored.");
                 else {
 #ifdef HAVE_VALGRIND_MEMCHECK_H
                     VALGRIND_MAKE_MEM_DEFINED(&u->hw_dB_min, sizeof(u->hw_dB_min));

src/modules/alsa/module-alsa-card.c

@@ -51,7 +51,8 @@ PA_MODULE_USAGE(
         "tsched=<enable system timer based scheduling mode?> "
         "tsched_buffer_size=<buffer size when using timer based scheduling> "
         "tsched_buffer_watermark=<lower fill watermark> "
-        "profile=<profile name>");
+        "profile=<profile name> "
+        "ignore_dB=<ignore dB information from the device?>");
 
 static const char* const valid_modargs[] = {
     "name",
@@ -68,6 +69,7 @@ static const char* const valid_modargs[] = {
     "tsched_buffer_size",
     "tsched_buffer_watermark",
     "profile",
+    "ignore_dB",
     NULL
 };
 

src/modules/alsa/module-alsa-sink.c

@@ -51,7 +51,8 @@ PA_MODULE_USAGE(
         "mmap=<enable memory mapping?> "
         "tsched=<enable system timer based scheduling mode?> "
         "tsched_buffer_size=<buffer size when using timer based scheduling> "
-        "tsched_buffer_watermark=<lower fill watermark>");
+        "tsched_buffer_watermark=<lower fill watermark> "
+        "ignore_dB=<ignore dB information from the device?>");
 
 static const char* const valid_modargs[] = {
     "name",
@@ -68,6 +69,7 @@ static const char* const valid_modargs[] = {
     "tsched",
     "tsched_buffer_size",
     "tsched_buffer_watermark",
+    "ignore_dB",
     NULL
 };
 

src/modules/alsa/module-alsa-source.c

@@ -75,7 +75,8 @@ PA_MODULE_USAGE(
         "mmap=<enable memory mapping?> "
         "tsched=<enable system timer based scheduling mode?> "
         "tsched_buffer_size=<buffer size when using timer based scheduling> "
-        "tsched_buffer_watermark=<upper fill watermark>");
+        "tsched_buffer_watermark=<upper fill watermark> "
+        "ignore_dB=<ignore dB information from the device?>");
 
 static const char* const valid_modargs[] = {
     "name",
@@ -92,6 +93,7 @@ static const char* const valid_modargs[] = {
     "tsched",
     "tsched_buffer_size",
     "tsched_buffer_watermark",
+    "ignore_dB",
     NULL
 };