aboutsummaryrefslogtreecommitdiffstats
path: root/src/outputBuffer.c
blob: d9cbcdc60239d56586055382e24ac1bdd6e3c12f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
/* the Music Player Daemon (MPD)
 * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
 * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "outputBuffer.h"

#include "pcm_utils.h"
#include "playerData.h"
#include "utils.h"
#include "log.h"
#include "normalize.h"
#include "conf.h"

#include <string.h>

static mpd_sint16 currentChunk = -1;

static mpd_sint8 currentMetaChunk = -1;
static mpd_sint8 sendMetaChunk;

void clearAllMetaChunkSets(OutputBuffer * cb)
{
	memset(cb->metaChunkSet, 0, BUFFERED_METACHUNKS);
}

void clearOutputBuffer(OutputBuffer * cb)
{
	int currentSet = 1;

	cb->end = cb->begin;

	/* be sure to reset metaChunkSets cause we are skipping over audio
	 * audio chunks, and thus skipping over metadata */
	if (currentChunk >= 0 && sendMetaChunk == 0 && currentMetaChunk >= 0) {
		currentSet = cb->metaChunkSet[currentChunk];
	}
	clearAllMetaChunkSets(cb);
	if (currentChunk >= 0 && sendMetaChunk == 0 && currentMetaChunk >= 0) {
		cb->metaChunkSet[currentChunk] = currentSet;
	}
	currentChunk = -1;
}

void flushOutputBuffer(OutputBuffer * cb)
{
	if (currentChunk == cb->end) {
		if ((cb->end + 1) >= buffered_chunks) {
			cb->end = 0;
		}
		else cb->end++;
		currentChunk = -1;
	}
}

int sendDataToOutputBuffer(OutputBuffer * cb, InputStream * inStream,
			   DecoderControl * dc, int seekable, void *dataIn,
			   long dataInLen, float time, mpd_uint16 bitRate,
			   ReplayGainInfo * replayGainInfo)
{
	mpd_uint16 dataToSend;
	mpd_uint16 chunkLeft;
	char *data;
	size_t datalen;
	static char *convBuffer;
	static long convBufferLen;

	if (cmpAudioFormat(&(cb->audioFormat), &(dc->audioFormat)) == 0) {
		data = dataIn;
		datalen = dataInLen;
	} else {
		datalen = pcm_sizeOfConvBuffer(&(dc->audioFormat), dataInLen,
		                               &(cb->audioFormat));
		if (datalen > convBufferLen) {
			convBuffer = xrealloc(convBuffer, datalen);
			convBufferLen = datalen;
		}
		data = convBuffer;
		pcm_convertAudioFormat(&(dc->audioFormat), dataIn, dataInLen,
		                       &(cb->audioFormat), data,
		                       &(cb->convState));
	}

	if (replayGainInfo && (replayGainState != REPLAYGAIN_OFF))
		doReplayGain(replayGainInfo, data, datalen, &cb->audioFormat);
	else if (normalizationEnabled)
		normalizeData(data, datalen, &cb->audioFormat);

	while (datalen) {
		if (currentChunk != cb->end) {
			int next = cb->end + 1;
			if (next >= buffered_chunks) {
				next = 0;
			}
			while (cb->begin == next && !dc->stop) {
				if (dc->seek) {
					if (seekable) {
						return OUTPUT_BUFFER_DC_SEEK;
					} else {
						dc->seekError = 1;
						dc->seek = 0;
					}
				}
				if (!inStream ||
				    bufferInputStream(inStream) <= 0) {
					my_usleep(10000);
				}
			}
			if (dc->stop)
				return OUTPUT_BUFFER_DC_STOP;

			currentChunk = cb->end;
			cb->chunkSize[currentChunk] = 0;

			if (sendMetaChunk) {
				cb->metaChunk[currentChunk] = currentMetaChunk;
			} else
				cb->metaChunk[currentChunk] = -1;
			cb->bitRate[currentChunk] = bitRate;
			cb->times[currentChunk] = time;
		}

		chunkLeft = CHUNK_SIZE - cb->chunkSize[currentChunk];
		dataToSend = datalen > chunkLeft ? chunkLeft : datalen;

		memcpy(cb->chunks + currentChunk * CHUNK_SIZE +
		       cb->chunkSize[currentChunk], data, dataToSend);
		cb->chunkSize[currentChunk] += dataToSend;
		datalen -= dataToSend;
		data += dataToSend;

		if (cb->chunkSize[currentChunk] == CHUNK_SIZE) {
			flushOutputBuffer(cb);
		}
	}

	return 0;
}

int copyMpdTagToOutputBuffer(OutputBuffer * cb, MpdTag * tag)
{
	int nextChunk;
	static MpdTag *last;

	if (!cb->acceptMetadata || !tag) {
		sendMetaChunk = 0;
		if (last)
			freeMpdTag(last);
		last = NULL;
		DEBUG("copyMpdTagToOB: !acceptMetadata || !tag\n");
		return 0;
	}

	if (last && mpdTagsAreEqual(last, tag)) {
		DEBUG("copyMpdTagToOB: same as last\n");
		return 0;
	}

	if (last)
		freeMpdTag(last);
	last = NULL;

	nextChunk = currentMetaChunk + 1;
	if (nextChunk >= BUFFERED_METACHUNKS)
		nextChunk = 0;

	if (cb->metaChunkSet[nextChunk]) {
		sendMetaChunk = 0;
		DEBUG("copyMpdTagToOB: metachunk in use!\n");
		return -1;
	}

	sendMetaChunk = 1;
	currentMetaChunk = nextChunk;

	last = mpdTagDup(tag);

	copyMpdTagToMetadataChunk(tag, &(cb->metadataChunks[currentMetaChunk]));

	cb->metaChunkSet[nextChunk] = 1;

	DEBUG("copyMpdTagToOB: copiedTag\n");

	return 0;
}