1 /*****************************************************************************
2 * aout_internal.h : internal defines for audio output
3 *****************************************************************************
4 * Copyright (C) 2002 VLC authors and VideoLAN
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 #ifndef LIBVLC_AOUT_INTERNAL_H
25 # define LIBVLC_AOUT_INTERNAL_H 1
27 # include <vlc_atomic.h>
29 /* Max input rate factor (1/4 -> 4) */
30 # define AOUT_MAX_INPUT_RATE (4)
32 # define AOUT_MAX_FILTERS 10
35 AOUT_RESAMPLING_NONE=0,
42 struct vout_thread_t *(*pf_request_vout)( void *, struct vout_thread_t *,
43 video_format_t *, bool );
45 } aout_request_vout_t;
47 typedef struct aout_volume aout_volume_t;
48 typedef struct aout_dev aout_dev_t;
53 module_t *module; /**< Output plugin (or NULL if inactive) */
54 aout_volume_t *volume;
73 mtime_t end; /**< Last seen PTS */
74 unsigned resamp_start_drift; /**< Resampler drift absolute value */
75 int resamp_type; /**< Resampler mode (FIXME: redundant / resampling) */
79 audio_sample_format_t input_format;
80 audio_sample_format_t mixer_format;
82 filter_t *rate_filter; /**< The filter adjusting samples count
83 (either the scaletempo filter or a resampler) */
84 filter_t *resampler; /**< The resampler */
85 int resampling; /**< Current resampling (Hz) */
87 filter_t *filters[AOUT_MAX_FILTERS]; /**< Configured user filters
88 (e.g. equalization) and their conversions */
90 aout_request_vout_t request_vout;
93 atomic_uint buffers_lost;
99 audio_output_t output;
103 static inline aout_owner_t *aout_owner (audio_output_t *aout)
105 return &((aout_instance_t *)aout)->owner;
108 /****************************************************************************
110 *****************************************************************************/
112 /* From filters.c : */
113 int aout_FiltersNew(audio_output_t *, const audio_sample_format_t *,
114 const audio_sample_format_t *, const aout_request_vout_t *);
115 void aout_FiltersDelete(audio_output_t *);
116 bool aout_FiltersAdjustResampling(audio_output_t *, int);
117 block_t *aout_FiltersPlay(audio_output_t *, block_t *, int rate);
120 aout_volume_t *aout_volume_New(vlc_object_t *, const audio_replay_gain_t *);
121 #define aout_volume_New(o, g) aout_volume_New(VLC_OBJECT(o), g)
122 int aout_volume_SetFormat(aout_volume_t *, vlc_fourcc_t);
123 void aout_volume_SetVolume(aout_volume_t *, float);
124 int aout_volume_Amplify(aout_volume_t *, block_t *);
125 void aout_volume_Delete(aout_volume_t *);
128 /* From output.c : */
129 audio_output_t *aout_New (vlc_object_t *);
130 #define aout_New(a) aout_New(VLC_OBJECT(a))
131 void aout_Destroy (audio_output_t *);
133 int aout_OutputNew(audio_output_t *, audio_sample_format_t *);
134 int aout_OutputTimeGet(audio_output_t *, mtime_t *);
135 void aout_OutputPlay(audio_output_t *, block_t *);
136 void aout_OutputPause( audio_output_t * p_aout, bool, mtime_t );
137 void aout_OutputFlush( audio_output_t * p_aout, bool );
138 void aout_OutputDelete( audio_output_t * p_aout );
139 void aout_OutputLock(audio_output_t *);
140 void aout_OutputUnlock(audio_output_t *);
143 /* From common.c : */
144 void aout_FormatsPrint(vlc_object_t *, const char *,
145 const audio_sample_format_t *,
146 const audio_sample_format_t *);
147 #define aout_FormatsPrint(o, t, a, b) \
148 aout_FormatsPrint(VLC_OBJECT(o), t, a, b)
149 bool aout_ChangeFilterString( vlc_object_t *manager, vlc_object_t *aout,
150 const char *var, const char *name, bool b_add );
153 int aout_DecNew(audio_output_t *, const audio_sample_format_t *,
154 const audio_replay_gain_t *, const aout_request_vout_t *);
155 void aout_DecDelete(audio_output_t *);
156 block_t *aout_DecNewBuffer(audio_output_t *, size_t);
157 void aout_DecDeleteBuffer(audio_output_t *, block_t *);
158 int aout_DecPlay(audio_output_t *, block_t *, int i_input_rate);
159 int aout_DecGetResetLost(audio_output_t *);
160 void aout_DecChangePause(audio_output_t *, bool b_paused, mtime_t i_date);
161 void aout_DecFlush(audio_output_t *);
162 bool aout_DecIsEmpty(audio_output_t *);
163 void aout_RequestRestart (audio_output_t *, unsigned);
165 static inline void aout_InputRequestRestart(audio_output_t *aout)
167 aout_RequestRestart(aout, AOUT_RESTART_FILTERS);
170 #endif /* !LIBVLC_AOUT_INTERNAL_H */