introspect: Get format of sink input

This gets the negotiated format of sink inputs in
pa_context_get_sink_input*(). Also prints the format in 'pactl list'.

PROTOCOL

@@ -236,3 +236,8 @@ PA_COMMAND_GET_SINK_INFO_LIST)
     format_info format1
     ...
     format_info formatn
+
+One new field in reply from PA_COMMAND_GET_SINK_INPUT_INFO (and thus
+PA_COMMAND_GET_SINK_INPUT_INFO_LIST)
+
+    format_info format

src/pulse/introspect.c

@@ -1033,6 +1033,7 @@ static void context_get_sink_input_info_callback(pa_pdispatch *pd, uint32_t comm
 
             pa_zero(i);
             i.proplist = pa_proplist_new();
+            i.format = pa_format_info_new();
 
             if (pa_tagstruct_getu32(t, &i.index) < 0 ||
                 pa_tagstruct_gets(t, &i.name) < 0 ||
@@ -1050,10 +1051,12 @@ static void context_get_sink_input_info_callback(pa_pdispatch *pd, uint32_t comm
                 (o->context->version >= 13 && pa_tagstruct_get_proplist(t, i.proplist) < 0) ||
                 (o->context->version >= 19 && pa_tagstruct_get_boolean(t, &corked) < 0) ||
                 (o->context->version >= 20 && (pa_tagstruct_get_boolean(t, &has_volume) < 0 ||
-                                               pa_tagstruct_get_boolean(t, &volume_writable) < 0))) {
+                                               pa_tagstruct_get_boolean(t, &volume_writable) < 0)) ||
+                (o->context->version >= 21 && pa_tagstruct_get_format_info(t, i.format) < 0)) {
 
                 pa_context_fail(o->context, PA_ERR_PROTOCOL);
                 pa_proplist_free(i.proplist);
+                pa_format_info_free(i.format);
                 goto finish;
             }
 
@@ -1068,6 +1071,7 @@ static void context_get_sink_input_info_callback(pa_pdispatch *pd, uint32_t comm
             }
 
             pa_proplist_free(i.proplist);
+            pa_format_info_free(i.format);
         }
     }
 

src/pulse/introspect.h

@@ -508,6 +508,7 @@ typedef struct pa_sink_input_info {
     int corked;                          /**< Stream corked \since 1.0 */
     int has_volume;                      /**< Stream has volume. If not set, then the meaning of this struct's volume member is unspecified. \since 1.0 */
     int volume_writable;                 /**< The volume can be set. If not set, the volume can still change even though clients can't control the volume. \since 1.0 */
+    pa_format_info *format;              /**< Stream format information. \since 1.0 */
 } pa_sink_input_info;
 
 /** Callback prototype for pa_context_get_sink_input_info() and friends*/

src/pulsecore/protocol-native.c

@@ -3153,6 +3153,8 @@ static void sink_input_fill_tagstruct(pa_native_connection *c, pa_tagstruct *t,
         pa_tagstruct_put_boolean(t, has_volume);
         pa_tagstruct_put_boolean(t, s->volume_writable);
     }
+    if (c->version >= 21)
+        pa_tagstruct_put_format_info(t, s->format);
 }
 
 static void source_output_fill_tagstruct(pa_native_connection *c, pa_tagstruct *t, pa_source_output *s) {

src/utils/pactl.c

@@ -560,7 +560,7 @@ static void get_card_info_callback(pa_context *c, const pa_card_info *i, int is_
 }
 
 static void get_sink_input_info_callback(pa_context *c, const pa_sink_input_info *i, int is_last, void *userdata) {
-    char t[32], k[32], s[PA_SAMPLE_SPEC_SNPRINT_MAX], cv[PA_CVOLUME_SNPRINT_MAX], cvdb[PA_SW_CVOLUME_SNPRINT_DB_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
+    char t[32], k[32], s[PA_SAMPLE_SPEC_SNPRINT_MAX], cv[PA_CVOLUME_SNPRINT_MAX], cvdb[PA_SW_CVOLUME_SNPRINT_DB_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX], f[PA_FORMAT_INFO_SNPRINT_MAX];
     char *pl;
 
     if (is_last < 0) {
@@ -600,6 +600,7 @@ static void get_sink_input_info_callback(pa_context *c, const pa_sink_input_info
              "\tSink: %u\n"
              "\tSample Specification: %s\n"
              "\tChannel Map: %s\n"
+             "\tFormat: %s\n"
              "\tMute: %s\n"
              "\tVolume: %s\n"
              "\t        %s\n"
@@ -615,6 +616,7 @@ static void get_sink_input_info_callback(pa_context *c, const pa_sink_input_info
            i->sink,
            pa_sample_spec_snprint(s, sizeof(s), &i->sample_spec),
            pa_channel_map_snprint(cm, sizeof(cm), &i->channel_map),
+           pa_format_info_snprint(f, sizeof(f), i->format),
            pa_yes_no(i->mute),
            pa_cvolume_snprint(cv, sizeof(cv), &i->volume),
            pa_sw_cvolume_snprint_dB(cvdb, sizeof(cvdb), &i->volume),