* record: request float32 input sample format for Opus/Vorbis/MP3 by default

int16 is the sample format used by default,
 and some precision could be lost during int16->float32 conversion.

Author: stsaz

src/exe/record.h

@@ -279,6 +279,15 @@ static int rec_check(struct cmd_rec *r)
 	if (!(r->aenc = cmd_oext_aenc(ext, 0)))
 		return _ffargs_err(&x->cmd, 1, "Specified output file format is not supported: \"%S\"", &ext);
 
+	if (!r->aformat) {
+		switch (r->aenc) {
+		case PHI_AC_MP3:
+		case PHI_AC_OPUS:
+		case PHI_AC_VORBIS:
+			r->aformat = PHI_PCM_FLOAT32;
+		}
+	}
+
 	if (r->buffer)
 		x->timer_int_msec = ffmin(r->buffer / 2, x->timer_int_msec);
 	return 0;

src/jni/record.h

@@ -119,10 +119,13 @@ Java_com_github_stsaz_phiola_Phiola_recStart(JNIEnv *env, jobject thiz, jstring
 		break;
 
 	case AF_MP3:
-		c.mp3.quality = (uint)q + 1;  break;
+		c.iaudio.format.format = PHI_PCM_FLOAT32;
+		c.mp3.quality = (uint)q + 1;
+		break;
 
 	case AF_OPUS:
 	case AF_OPUS_VOICE:
+		c.iaudio.format.format = PHI_PCM_FLOAT32;
 		c.opus.bitrate = q;
 		c.opus.mode = !!(fmt == AF_OPUS_VOICE);
 		break;