aboutsummaryrefslogtreecommitdiffstats
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/decoder/mad_decoder_plugin.c91
-rw-r--r--src/tag_rva2.c110
-rw-r--r--src/tag_rva2.h39
3 files changed, 151 insertions, 89 deletions
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>
@@ -211,94 +212,6 @@ mp3_fill_buffer(struct mp3_data *data)
}
#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,
struct id3_tag *tag)
@@ -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
diff --git a/src/tag_rva2.c b/src/tag_rva2.c
new file mode 100644
index 000000000..28002025b
--- /dev/null
+++ b/src/tag_rva2.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "tag_rva2.h"
+#include "replay_gain_info.h"
+
+#include <glib.h>
+#include <id3tag.h>
+
+bool
+tag_rva2_parse(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;
+}
diff --git a/src/tag_rva2.h b/src/tag_rva2.h
new file mode 100644
index 000000000..a92c97912
--- /dev/null
+++ b/src/tag_rva2.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_TAG_RVA2_H
+#define MPD_TAG_RVA2_H
+
+#include "check.h"
+
+#include <stdbool.h>
+
+struct id3_tag;
+struct replay_gain_info;
+
+/**
+ * Parse the RVA2 tag, and fill the #replay_gain_info struct. This is
+ * used by decoder plugins with ID3 support.
+ *
+ * @return true on success
+ */
+bool
+tag_rva2_parse(struct id3_tag *tag, struct replay_gain_info *replay_gain_info);
+
+#endif