pulsesink: Add support for AAC pass-through

https://bugzilla.gnome.org/show_bug.cgi?id=694445

ext/pulse/pulsesink.c

@@ -1796,6 +1796,8 @@ gst_pulsesink_payload (GstAudioBaseSink * sink, GstBuffer * buf)
     case GST_AUDIO_RING_BUFFER_FORMAT_TYPE_EAC3:
     case GST_AUDIO_RING_BUFFER_FORMAT_TYPE_DTS:
     case GST_AUDIO_RING_BUFFER_FORMAT_TYPE_MPEG:
+    case GST_AUDIO_RING_BUFFER_FORMAT_TYPE_MPEG2_AAC:
+    case GST_AUDIO_RING_BUFFER_FORMAT_TYPE_MPEG4_AAC:
     {
       /* FIXME: alloc memory from PA if possible */
       gint framesize = gst_audio_iec61937_frame_size (&sink->ringbuffer->spec);

ext/pulse/pulsesink.h

@@ -97,7 +97,8 @@ GType gst_pulsesink_get_type (void);
   _PULSE_CAPS_AC3 \
   _PULSE_CAPS_EAC3 \
   _PULSE_CAPS_DTS \
-  _PULSE_CAPS_MP3
+  _PULSE_CAPS_MP3 \
+  _PULSE_CAPS_AAC
 
 G_END_DECLS
 

ext/pulse/pulseutil.c

@@ -164,6 +164,13 @@ gst_pulse_fill_format_info (GstAudioRingBufferSpec * spec, pa_format_info ** f,
     format->encoding = PA_ENCODING_DTS_IEC61937;
   } else if (spec->type == GST_AUDIO_RING_BUFFER_FORMAT_TYPE_MPEG) {
     format->encoding = PA_ENCODING_MPEG_IEC61937;
+#if PA_CHECK_VERSION(3,99,0)
+  } else if (spec->type == GST_AUDIO_RING_BUFFER_FORMAT_TYPE_MPEG2_AAC) {
+    format->encoding = PA_ENCODING_MPEG2_AAC_IEC61937;
+  } else if (spec->type == GST_AUDIO_RING_BUFFER_FORMAT_TYPE_MPEG4_AAC) {
+    /* HACK. treat MPEG4 AAC as MPEG2 AAC for the moment */
+    format->encoding = PA_ENCODING_MPEG2_AAC_IEC61937;
+#endif
   } else {
     goto fail;
   }

ext/pulse/pulseutil.h

@@ -61,6 +61,8 @@
     "block-size = (int) { 512, 1024, 2048 }; "
 #define _PULSE_CAPS_MP3 "audio/mpeg, mpegversion = (int) 1, " \
     "mpegaudioversion = (int) [ 1, 2 ], parsed = (boolean) true;"
+#define _PULSE_CAPS_AAC "audio/mpeg, mpegversion = (int) { 2, 4 }, " \
+    "framed = (boolean) true, stream-format = (string) adts;"
 
 #define _PULSE_CAPS_PCM \
   _PULSE_CAPS_LINEAR \