crossfade: convert to C++

1 files changed, 0 insertions, 136 deletions

diff --git a/src/crossfade.c b/src/crossfade.c
deleted file mode 100644
index cf3943314..000000000
--- a/src/crossfade.c
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * Copyright (C) 2003-2011 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 "crossfade.h"
-#include "MusicChunk.hxx"
-#include "audio_format.h"
-#include "tag.h"
-
-#include <assert.h>
-#include <string.h>
-#include <stdlib.h>
-#include <glib.h>
-
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "crossfade"
-
-#ifdef G_OS_WIN32
-static char *
-strtok_r(char *str, const char *delim, G_GNUC_UNUSED char **saveptr)
-{
-	return strtok(str, delim);
-}
-#endif
-
-static float mixramp_interpolate(char *ramp_list, float required_db)
-{
-	float db, secs, last_db = nan(""), last_secs = 0;
-	char *ramp_str, *save_str = NULL;
-
-	/* ramp_list is a string of pairs of dBs and seconds that describe the
-	 * volume profile. Delimiters are semi-colons between pairs and spaces
-	 * between the dB and seconds of a pair.
-	 * The dB values must be monotonically increasing for this to work. */
-
-	while (1) {
-		/* Parse the dB tokens out of the input string. */
-		ramp_str = strtok_r(ramp_list, " ", &save_str);
-
-		/* Tell strtok to continue next time round. */
-		ramp_list = NULL;
-
-		/* Parse the dB value. */
-		if (NULL == ramp_str) {
-			return nan("");
-		}
-		db = (float)atof(ramp_str);
-
-		/* Parse the time. */
-		ramp_str = strtok_r(NULL, ";", &save_str);
-		if (NULL == ramp_str) {
-			return nan("");
-		}
-		secs = (float)atof(ramp_str);
-
-		/* Check for exact match. */
-		if (db == required_db) {
-			return secs;
-		}
-
-		/* Save if too quiet. */
-		if (db < required_db) {
-			last_db = db;
-			last_secs = secs;
-			continue;
-		}
-
-		/* If required db < any stored value, use the least. */
-		if (isnan(last_db)) {
-			return secs;
-		}
-
-		/* Finally, interpolate linearly. */
-		secs = last_secs + (required_db - last_db) * (secs - last_secs) / (db - last_db);
-		return secs;
-	}
-}
-
-unsigned cross_fade_calc(float duration, float total_time,
-			 float mixramp_db, float mixramp_delay,
-			 float replay_gain_db, float replay_gain_prev_db,
-			 char *mixramp_start, char *mixramp_prev_end,
-			 const struct audio_format *af,
-			 const struct audio_format *old_format,
-			 unsigned max_chunks)
-{
-	unsigned int chunks = 0;
-	float chunks_f;
-	float mixramp_overlap;
-
-	if (duration < 0 || duration >= total_time ||
-	    /* we can't crossfade when the audio formats are different */
-	    !audio_format_equals(af, old_format))
-		return 0;
-
-	assert(duration >= 0);
-	assert(audio_format_valid(af));
-
-	chunks_f = (float)audio_format_time_to_size(af) / (float)CHUNK_SIZE;
-
-	if (isnan(mixramp_delay) || !(mixramp_start) || !(mixramp_prev_end)) {
-		chunks = (chunks_f * duration + 0.5);
-	} else {
-		/* Calculate mixramp overlap. */
-		mixramp_overlap = mixramp_interpolate(mixramp_start, mixramp_db - replay_gain_db)
-		  + mixramp_interpolate(mixramp_prev_end, mixramp_db - replay_gain_prev_db);
-		if (!isnan(mixramp_overlap) && (mixramp_delay <= mixramp_overlap)) {
-			chunks = (chunks_f * (mixramp_overlap - mixramp_delay));
-			g_debug("will overlap %d chunks, %fs", chunks,
-				mixramp_overlap - mixramp_delay);
-		}
-	}
-
-	if (chunks > max_chunks) {
-		chunks = max_chunks;
-		g_warning("audio_buffer_size too small for computed MixRamp overlap");
-	}
-
-	return chunks;
-}