2006-03-16 07:52:46 +01:00
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/* the Music Player Daemon (MPD)
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2007-04-05 05:22:33 +02:00
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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2006-03-16 07:52:46 +01:00
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* This project's homepage is: http://www.musicpd.org
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*
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* Common data structures and functions used by FLAC and OggFLAC
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* (c) 2005 by Eric Wong <normalperson@yhbt.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "_flac_common.h"
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2009-01-01 18:09:24 +01:00
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#include <glib.h>
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2006-03-16 07:52:46 +01:00
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#include <FLAC/format.h>
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#include <FLAC/metadata.h>
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2009-01-15 19:50:28 +01:00
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void
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flac_data_init(struct flac_data *data, struct decoder * decoder,
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struct input_stream *input_stream)
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2006-03-16 07:52:46 +01:00
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{
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data->time = 0;
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data->position = 0;
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2009-01-15 19:50:28 +01:00
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data->bit_rate = 0;
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2008-08-26 08:27:04 +02:00
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data->decoder = decoder;
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2009-01-15 19:50:28 +01:00
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data->input_stream = input_stream;
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data->replay_gain_info = NULL;
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2006-03-16 07:52:46 +01:00
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data->tag = NULL;
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}
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2009-01-15 19:57:57 +01:00
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static bool
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2009-01-15 19:50:28 +01:00
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flac_find_float_comment(const FLAC__StreamMetadata *block,
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const char *cmnt, float *fl)
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2006-03-16 07:52:46 +01:00
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{
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2006-07-20 18:02:40 +02:00
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int offset =
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FLAC__metadata_object_vorbiscomment_find_entry_from(block, 0, cmnt);
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2006-03-16 07:52:46 +01:00
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2006-07-20 18:02:40 +02:00
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if (offset >= 0) {
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size_t pos = strlen(cmnt) + 1; /* 1 is for '=' */
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2006-03-16 07:52:46 +01:00
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int len = block->data.vorbis_comment.comments[offset].length
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2006-07-20 18:02:40 +02:00
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- pos;
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if (len > 0) {
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2006-03-16 07:52:46 +01:00
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unsigned char tmp;
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2008-01-26 13:46:21 +01:00
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unsigned char *p = &(block->data.vorbis_comment.
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comments[offset].entry[pos]);
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tmp = p[len];
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p[len] = '\0';
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2008-03-26 11:37:17 +01:00
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*fl = (float)atof((char *)p);
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2008-01-26 13:46:21 +01:00
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p[len] = tmp;
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2006-07-20 18:02:40 +02:00
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2009-01-15 19:57:57 +01:00
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return true;
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2006-03-16 07:52:46 +01:00
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}
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}
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2009-01-15 19:57:57 +01:00
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return false;
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2006-03-16 07:52:46 +01:00
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}
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/* replaygain stuff by AliasMrJones */
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2009-01-15 19:50:28 +01:00
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static void
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flac_parse_replay_gain(const FLAC__StreamMetadata *block,
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struct flac_data *data)
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2006-07-20 18:02:40 +02:00
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{
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2009-01-15 19:57:57 +01:00
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bool found;
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2006-03-16 07:52:46 +01:00
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2009-01-15 19:50:28 +01:00
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if (data->replay_gain_info)
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replay_gain_info_free(data->replay_gain_info);
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2006-03-16 07:52:46 +01:00
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2009-01-15 19:50:28 +01:00
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data->replay_gain_info = replay_gain_info_new();
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2006-03-16 07:52:46 +01:00
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2009-01-15 19:57:57 +01:00
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found = flac_find_float_comment(block, "replaygain_album_gain",
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&data->replay_gain_info->tuples[REPLAY_GAIN_ALBUM].gain) ||
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flac_find_float_comment(block, "replaygain_album_peak",
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&data->replay_gain_info->tuples[REPLAY_GAIN_ALBUM].peak) ||
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flac_find_float_comment(block, "replaygain_track_gain",
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&data->replay_gain_info->tuples[REPLAY_GAIN_TRACK].gain) ||
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flac_find_float_comment(block, "replaygain_track_peak",
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&data->replay_gain_info->tuples[REPLAY_GAIN_TRACK].peak);
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2006-03-16 07:52:46 +01:00
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if (!found) {
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2009-01-15 19:50:28 +01:00
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replay_gain_info_free(data->replay_gain_info);
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data->replay_gain_info = NULL;
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2006-03-16 07:52:46 +01:00
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}
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}
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2009-01-15 22:44:21 +01:00
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/**
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* Checks if the specified name matches the entry's name, and if yes,
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* returns the comment value (not null-temrinated).
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*/
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static const char *
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flac_comment_value(const FLAC__StreamMetadata_VorbisComment_Entry *entry,
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const char *name, size_t *length_r)
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{
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size_t name_length = strlen(name);
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const char *comment = (const char*)entry->entry;
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if (entry->length > name_length &&
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g_ascii_strncasecmp(comment, name, name_length) == 0 &&
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comment[name_length] == '=') {
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*length_r = entry->length - name_length - 1;
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return comment + name_length + 1;
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}
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return NULL;
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}
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2006-03-16 07:52:46 +01:00
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/* tracknumber is used in VCs, MPD uses "track" ..., all the other
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* tag names match */
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2006-07-20 18:02:40 +02:00
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static const char *VORBIS_COMMENT_TRACK_KEY = "tracknumber";
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static const char *VORBIS_COMMENT_DISC_KEY = "discnumber";
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2006-03-16 07:52:46 +01:00
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2009-01-15 19:57:57 +01:00
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static bool
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2009-01-15 22:43:39 +01:00
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flac_copy_vorbis_comment(struct tag *tag,
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const FLAC__StreamMetadata_VorbisComment_Entry *entry,
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enum tag_type type)
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2006-03-16 07:52:46 +01:00
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{
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2006-07-20 18:02:40 +02:00
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const char *str;
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2006-06-04 13:36:02 +02:00
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size_t slen;
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int vlen;
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2009-01-15 22:44:21 +01:00
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const char *value;
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size_t value_length;
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2006-06-04 13:36:02 +02:00
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2009-01-15 19:50:28 +01:00
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switch (type) {
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2006-07-20 18:02:40 +02:00
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case TAG_ITEM_TRACK:
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str = VORBIS_COMMENT_TRACK_KEY;
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break;
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case TAG_ITEM_DISC:
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str = VORBIS_COMMENT_DISC_KEY;
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break;
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default:
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2009-01-15 19:50:28 +01:00
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str = mpdTagItemKeys[type];
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2006-04-30 21:55:56 +02:00
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}
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2006-06-04 13:36:02 +02:00
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slen = strlen(str);
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vlen = entry->length - slen - 1;
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2006-03-16 07:52:46 +01:00
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2009-01-15 22:44:21 +01:00
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value = flac_comment_value(entry, str, &value_length);
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if (value != NULL) {
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tag_add_item_n(tag, type, value, value_length);
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2009-01-15 19:57:57 +01:00
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return true;
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2006-03-16 07:52:46 +01:00
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}
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2006-07-20 18:02:40 +02:00
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2009-01-15 19:57:57 +01:00
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return false;
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2006-03-16 07:52:46 +01:00
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}
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2006-07-20 18:02:40 +02:00
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2009-01-15 22:43:39 +01:00
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void
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flac_vorbis_comments_to_tag(struct tag *tag,
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const FLAC__StreamMetadata *block)
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2006-03-16 07:52:46 +01:00
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{
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unsigned int i, j;
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FLAC__StreamMetadata_VorbisComment_Entry *comments;
|
2006-07-20 18:02:40 +02:00
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2006-03-16 07:52:46 +01:00
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comments = block->data.vorbis_comment.comments;
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2006-07-20 18:02:40 +02:00
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2006-03-16 07:52:46 +01:00
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for (i = block->data.vorbis_comment.num_comments; i != 0; --i) {
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2006-07-20 18:02:40 +02:00
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for (j = TAG_NUM_OF_ITEM_TYPES; j--;) {
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2009-01-15 22:43:39 +01:00
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if (flac_copy_vorbis_comment(tag, comments, j))
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2006-03-16 07:52:46 +01:00
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break;
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}
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comments++;
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}
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}
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2006-07-20 18:02:40 +02:00
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void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
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2009-01-15 19:50:28 +01:00
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struct flac_data *data)
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2006-03-16 07:52:46 +01:00
|
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{
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const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info);
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2006-07-20 18:02:40 +02:00
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switch (block->type) {
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2006-03-16 07:52:46 +01:00
|
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case FLAC__METADATA_TYPE_STREAMINFO:
|
2008-09-29 15:49:29 +02:00
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data->audio_format.bits = (int8_t)si->bits_per_sample;
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2008-10-10 14:40:54 +02:00
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data->audio_format.sample_rate = si->sample_rate;
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2008-09-29 15:49:29 +02:00
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data->audio_format.channels = (int8_t)si->channels;
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2008-08-26 08:27:05 +02:00
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data->total_time = ((float)si->total_samples) / (si->sample_rate);
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2006-03-16 07:52:46 +01:00
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break;
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case FLAC__METADATA_TYPE_VORBIS_COMMENT:
|
2009-01-15 19:50:28 +01:00
|
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|
flac_parse_replay_gain(block, data);
|
2006-07-20 18:02:40 +02:00
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default:
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break;
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2006-03-16 07:52:46 +01:00
|
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}
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|
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}
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|
2006-07-20 18:02:40 +02:00
|
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void flac_error_common_cb(const char *plugin,
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const FLAC__StreamDecoderErrorStatus status,
|
2009-01-15 19:50:28 +01:00
|
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struct flac_data *data)
|
2006-03-16 07:52:46 +01:00
|
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{
|
2008-08-26 08:27:07 +02:00
|
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|
if (decoder_get_command(data->decoder) == DECODE_COMMAND_STOP)
|
2006-07-20 18:02:40 +02:00
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return;
|
2006-03-16 07:52:46 +01:00
|
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|
2006-07-20 18:02:40 +02:00
|
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|
switch (status) {
|
2006-03-16 07:52:46 +01:00
|
|
|
case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
|
2008-11-21 20:15:50 +01:00
|
|
|
g_warning("%s lost sync\n", plugin);
|
2006-03-16 07:52:46 +01:00
|
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|
break;
|
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|
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case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
|
2008-11-21 20:15:50 +01:00
|
|
|
g_warning("bad %s header\n", plugin);
|
2006-03-16 07:52:46 +01:00
|
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|
break;
|
|
|
|
case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
|
2008-11-21 20:15:50 +01:00
|
|
|
g_warning("%s crc mismatch\n", plugin);
|
2006-03-16 07:52:46 +01:00
|
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|
break;
|
|
|
|
default:
|
2008-11-21 20:15:50 +01:00
|
|
|
g_warning("unknown %s error\n", plugin);
|
2006-03-16 07:52:46 +01:00
|
|
|
}
|
|
|
|
}
|
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|
|
|
2008-09-23 23:59:54 +02:00
|
|
|
static void flac_convert_stereo16(int16_t *dest,
|
2008-09-23 23:59:54 +02:00
|
|
|
const FLAC__int32 * const buf[],
|
|
|
|
unsigned int position, unsigned int end)
|
|
|
|
{
|
|
|
|
for (; position < end; ++position) {
|
2008-09-23 23:59:54 +02:00
|
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|
*dest++ = buf[0][position];
|
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|
|
*dest++ = buf[1][position];
|
2008-09-23 23:59:54 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-09-23 23:59:55 +02:00
|
|
|
static void
|
|
|
|
flac_convert_16(int16_t *dest,
|
|
|
|
unsigned int num_channels,
|
|
|
|
const FLAC__int32 * const buf[],
|
|
|
|
unsigned int position, unsigned int end)
|
|
|
|
{
|
|
|
|
unsigned int c_chan;
|
|
|
|
|
|
|
|
for (; position < end; ++position)
|
|
|
|
for (c_chan = 0; c_chan < num_channels; c_chan++)
|
|
|
|
*dest++ = buf[c_chan][position];
|
|
|
|
}
|
|
|
|
|
2008-09-23 23:59:55 +02:00
|
|
|
/**
|
|
|
|
* Note: this function also handles 24 bit files!
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
flac_convert_32(int32_t *dest,
|
|
|
|
unsigned int num_channels,
|
|
|
|
const FLAC__int32 * const buf[],
|
|
|
|
unsigned int position, unsigned int end)
|
|
|
|
{
|
|
|
|
unsigned int c_chan;
|
|
|
|
|
|
|
|
for (; position < end; ++position)
|
|
|
|
for (c_chan = 0; c_chan < num_channels; c_chan++)
|
|
|
|
*dest++ = buf[c_chan][position];
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
flac_convert_8(int8_t *dest,
|
|
|
|
unsigned int num_channels,
|
|
|
|
const FLAC__int32 * const buf[],
|
|
|
|
unsigned int position, unsigned int end)
|
|
|
|
{
|
|
|
|
unsigned int c_chan;
|
|
|
|
|
|
|
|
for (; position < end; ++position)
|
|
|
|
for (c_chan = 0; c_chan < num_channels; c_chan++)
|
|
|
|
*dest++ = buf[c_chan][position];
|
|
|
|
}
|
|
|
|
|
2008-09-23 23:59:54 +02:00
|
|
|
static void flac_convert(unsigned char *dest,
|
|
|
|
unsigned int num_channels,
|
|
|
|
unsigned int bytes_per_sample,
|
|
|
|
const FLAC__int32 * const buf[],
|
|
|
|
unsigned int position, unsigned int end)
|
|
|
|
{
|
2008-09-23 23:59:55 +02:00
|
|
|
switch (bytes_per_sample) {
|
|
|
|
case 2:
|
|
|
|
if (num_channels == 2)
|
|
|
|
flac_convert_stereo16((int16_t*)dest, buf,
|
|
|
|
position, end);
|
|
|
|
else
|
|
|
|
flac_convert_16((int16_t*)dest, num_channels, buf,
|
|
|
|
position, end);
|
|
|
|
break;
|
2008-09-23 23:59:54 +02:00
|
|
|
|
2008-09-23 23:59:55 +02:00
|
|
|
case 4:
|
|
|
|
flac_convert_32((int32_t*)dest, num_channels, buf,
|
|
|
|
position, end);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 1:
|
|
|
|
flac_convert_8((int8_t*)dest, num_channels, buf,
|
|
|
|
position, end);
|
|
|
|
break;
|
2008-09-23 23:59:54 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
FLAC__StreamDecoderWriteStatus
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2009-01-15 19:50:28 +01:00
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flac_common_write(struct flac_data *data, const FLAC__Frame * frame,
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2008-09-23 23:59:54 +02:00
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const FLAC__int32 *const buf[])
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{
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unsigned int c_samp;
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const unsigned int num_channels = frame->header.channels;
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const unsigned int bytes_per_sample =
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audio_format_sample_size(&data->audio_format);
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const unsigned int bytes_per_channel =
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bytes_per_sample * frame->header.channels;
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const unsigned int max_samples = FLAC_CHUNK_SIZE / bytes_per_channel;
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unsigned int num_samples;
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2008-09-23 23:59:55 +02:00
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enum decoder_command cmd;
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2008-09-23 23:59:54 +02:00
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2008-09-23 23:59:55 +02:00
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if (bytes_per_sample != 1 && bytes_per_sample != 2 &&
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bytes_per_sample != 4)
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/* exotic unsupported bit rate */
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return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
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2008-09-23 23:59:54 +02:00
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for (c_samp = 0; c_samp < frame->header.blocksize;
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c_samp += num_samples) {
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num_samples = frame->header.blocksize - c_samp;
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if (num_samples > max_samples)
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num_samples = max_samples;
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2008-09-23 23:59:55 +02:00
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flac_convert(data->chunk,
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num_channels, bytes_per_sample, buf,
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c_samp, c_samp + num_samples);
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2009-01-15 19:50:28 +01:00
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cmd = decoder_data(data->decoder, data->input_stream,
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2008-11-02 17:01:51 +01:00
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data->chunk,
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2008-09-23 23:59:55 +02:00
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num_samples * bytes_per_channel,
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2009-01-15 19:50:28 +01:00
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data->time, data->bit_rate,
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data->replay_gain_info);
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2008-09-23 23:59:55 +02:00
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switch (cmd) {
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case DECODE_COMMAND_NONE:
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case DECODE_COMMAND_START:
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break;
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case DECODE_COMMAND_STOP:
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2008-09-23 23:59:54 +02:00
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return
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FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
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2008-09-23 23:59:55 +02:00
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case DECODE_COMMAND_SEEK:
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2008-09-23 23:59:54 +02:00
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return
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FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
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}
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}
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return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
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}
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