1/* in_flac - Winamp2 FLAC input plugin
2 * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007  Josh Coalson
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18
19#include "FLAC/all.h"
20#include "share/replaygain_synthesis.h"
21#include "plugin_common/all.h"
22
23/*
24 *  constants
25 */
26
27#define SAMPLES_PER_WRITE           576
28
29#define BITRATE_HIST_SEGMENT_MSEC   500
30#define BITRATE_HIST_SIZE           64
31
32/*
33 *  common structures
34 */
35
36typedef struct {
37	volatile FLAC__bool is_playing;
38	volatile FLAC__bool abort_flag;
39	volatile FLAC__bool eof;
40	volatile int seek_to;
41	FLAC__uint64 total_samples;
42	unsigned bits_per_sample;
43	unsigned output_bits_per_sample;
44	unsigned channels;
45	unsigned sample_rate;
46	int length_in_msec; /* int (instead of FLAC__uint64) only because that's what Winamp uses; seeking won't work right if this maxes out */
47	unsigned average_bps;
48	FLAC__bool has_replaygain;
49	double replay_scale;
50	DitherContext dither_context;
51} stream_data_struct;
52
53
54typedef struct {
55	struct {
56		FLAC__bool enable;
57		FLAC__bool album_mode;
58		int  preamp;
59		FLAC__bool hard_limit;
60	} replaygain;
61	struct {
62		struct {
63			FLAC__bool dither_24_to_16;
64		} normal;
65		struct {
66			FLAC__bool dither;
67			int  noise_shaping; /* value must be one of NoiseShaping enum, see plugin_common/replaygain_synthesis.h */
68			int  bps_out;
69		} replaygain;
70	} resolution;
71	struct {
72		FLAC__bool stop_err;
73	} misc;
74} output_config_t;
75
76/*
77 *  protopytes
78 */
79
80FLAC__bool FLAC_plugin__decoder_init(FLAC__StreamDecoder *decoder, const char *filename, FLAC__int64 filesize, stream_data_struct *stream_data, output_config_t *config);
81void FLAC_plugin__decoder_finish(FLAC__StreamDecoder *decoder);
82void FLAC_plugin__decoder_delete(FLAC__StreamDecoder *decoder);
83
84int FLAC_plugin__seek(FLAC__StreamDecoder *decoder, stream_data_struct *stream_data);
85unsigned FLAC_plugin__decode(FLAC__StreamDecoder *decoder, stream_data_struct *stream_data, char *sample_buffer);
86int FLAC_plugin__get_rate(unsigned written_time, unsigned output_time, stream_data_struct *stream_data);
87
88/*
89 *  these should be defined in plug-in
90 */
91
92extern void FLAC_plugin__show_error(const char *message,...);
93