From 4364b30c423d230568a4b4f47a0e3b5fa9ff831b Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Tue, 20 Jul 2010 18:38:10 +0200
Subject: decoder/mad: move RVA2 code to tag_rva2.c

---
 src/decoder/mad_decoder_plugin.c | 91 +---------------------------------------
 1 file changed, 2 insertions(+), 89 deletions(-)

(limited to 'src/decoder')

diff --git a/src/decoder/mad_decoder_plugin.c b/src/decoder/mad_decoder_plugin.c
index 037fdfb15..5aa09b336 100644
--- a/src/decoder/mad_decoder_plugin.c
+++ b/src/decoder/mad_decoder_plugin.c
@@ -21,6 +21,7 @@
 #include "decoder_api.h"
 #include "conf.h"
 #include "tag_id3.h"
+#include "tag_rva2.h"
 #include "audio_check.h"
 
 #include <assert.h>
@@ -210,94 +211,6 @@ mp3_fill_buffer(struct mp3_data *data)
 	return true;
 }
 
-#ifdef HAVE_ID3TAG
-/* Parse mp3 RVA2 frame. Shamelessly stolen from madplay. */
-static bool
-parse_rva2(struct id3_tag *tag, struct replay_gain_info *replay_gain_info)
-{
-	struct id3_frame const * frame;
-
-	id3_latin1_t const *id;
-	id3_byte_t const *data;
-	id3_length_t length;
-
-	enum {
-		CHANNEL_OTHER         = 0x00,
-		CHANNEL_MASTER_VOLUME = 0x01,
-		CHANNEL_FRONT_RIGHT   = 0x02,
-		CHANNEL_FRONT_LEFT    = 0x03,
-		CHANNEL_BACK_RIGHT    = 0x04,
-		CHANNEL_BACK_LEFT     = 0x05,
-		CHANNEL_FRONT_CENTRE  = 0x06,
-		CHANNEL_BACK_CENTRE   = 0x07,
-		CHANNEL_SUBWOOFER     = 0x08
-	};
-
-	/* relative volume adjustment information */
-
-	frame = id3_tag_findframe(tag, "RVA2", 0);
-	if (frame == NULL)
-		return false;
-
-	id   = id3_field_getlatin1(id3_frame_field(frame, 0));
-	data = id3_field_getbinarydata(id3_frame_field(frame, 1),
-					&length);
-
-	if (id == NULL || data == NULL)
-		return false;
-
-	/*
-	 * "The 'identification' string is used to identify the
-	 * situation and/or device where this adjustment should apply.
-	 * The following is then repeated for every channel
-	 *
-	 *   Type of channel         $xx
-	 *   Volume adjustment       $xx xx
-	 *   Bits representing peak  $xx
-	 *   Peak volume             $xx (xx ...)"
-	 */
-
-	while (length >= 4) {
-		unsigned int peak_bytes;
-
-		peak_bytes = (data[3] + 7) / 8;
-		if (4 + peak_bytes > length)
-			break;
-
-		if (data[0] == CHANNEL_MASTER_VOLUME) {
-			signed int voladj_fixed;
-			double voladj_float;
-
-			/*
-			 * "The volume adjustment is encoded as a fixed
-			 * point decibel value, 16 bit signed integer
-			 * representing (adjustment*512), giving +/- 64
-			 * dB with a precision of 0.001953125 dB."
-			 */
-
-			voladj_fixed  = (data[1] << 8) | (data[2] << 0);
-			voladj_fixed |= -(voladj_fixed & 0x8000);
-
-			voladj_float  = (double) voladj_fixed / 512;
-
-			replay_gain_info->tuples[REPLAY_GAIN_TRACK].gain = voladj_float;
-			replay_gain_info->tuples[REPLAY_GAIN_ALBUM].gain = voladj_float;
-
-			g_debug("parseRVA2: Relative Volume "
-				"%+.1f dB adjustment (%s)\n",
-				voladj_float, id);
-
-			return true;
-		}
-
-		data   += 4 + peak_bytes;
-		length -= 4 + peak_bytes;
-	}
-
-	return false;
-}
-#endif
-
 #ifdef HAVE_ID3TAG
 static bool
 parse_id3_replay_gain_info(struct replay_gain_info *replay_gain_info,
@@ -342,7 +255,7 @@ parse_id3_replay_gain_info(struct replay_gain_info *replay_gain_info,
 
 	return found ||
 		/* fall back on RVA2 if no replaygain tags found */
-		parse_rva2(tag, replay_gain_info);
+		tag_rva2_parse(tag, replay_gain_info);
 }
 #endif
 
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