1 /*****************************************************************************
2 * aout_internal.h : internal defines for audio output
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: aout_internal.h,v 1.3 2002/08/12 22:12:50 massiot Exp $
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 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 General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
25 * aout_alloc_t : allocation of memory in the audio output
26 *****************************************************************************/
27 typedef struct aout_alloc_t
30 int i_bytes_per_sec; /* -1 if only the alloc_type is
34 #define AOUT_ALLOC_NONE 0
35 #define AOUT_ALLOC_STACK 1
36 #define AOUT_ALLOC_HEAP 2
38 #define aout_BufferAlloc( p_alloc, i_nb_usec, p_previous_buffer, p_new_buffer ) \
39 if ( (p_alloc)->i_alloc_type == AOUT_ALLOC_NONE ) \
41 (p_new_buffer) = p_previous_buffer; \
45 if ( (p_alloc)->i_alloc_type == AOUT_ALLOC_STACK ) \
47 (p_new_buffer) = alloca( (u64)(p_alloc)->i_bytes_per_sec \
49 / 1000000 + 1 + sizeof(aout_buffer_t) ); \
53 (p_new_buffer) = malloc( (u64)(p_alloc)->i_bytes_per_sec \
55 / 1000000 + 1 + sizeof(aout_buffer_t) ); \
57 if ( p_new_buffer != NULL ) \
59 (p_new_buffer)->i_alloc_type = (p_alloc)->i_alloc_type; \
60 (p_new_buffer)->i_size = (u64)(p_alloc)->i_bytes_per_sec \
61 * (i_nb_usec) / 1000000 + 1; \
62 (p_new_buffer)->p_buffer = (byte_t *)(p_new_buffer) \
63 + sizeof(aout_buffer_t); \
64 if ( (p_previous_buffer) != NULL ) \
66 (p_new_buffer)->start_date = \
67 ((aout_buffer_t *)p_previous_buffer)->start_date;\
68 (p_new_buffer)->end_date = \
69 ((aout_buffer_t *)p_previous_buffer)->end_date; \
72 /* we'll keep that for a while --Meuuh */ \
73 /* else printf("%s:%d\n", __FILE__, __LINE__); */ \
76 #define aout_BufferFree( p_buffer ) \
77 if ( (p_buffer)->i_alloc_type == AOUT_ALLOC_HEAP ) \
82 /*****************************************************************************
83 * aout_fifo_t : audio output buffer FIFO
84 *****************************************************************************/
85 typedef struct aout_fifo_t
88 struct aout_buffer_t * p_first;
89 struct aout_buffer_t ** pp_last;
92 static inline void aout_FifoInit( struct aout_instance_t * p_aout,
93 aout_fifo_t * p_fifo )
95 vlc_mutex_init( (vlc_object_t *)p_aout, &p_fifo->lock );
96 p_fifo->p_first = NULL;
97 p_fifo->pp_last = &p_fifo->p_first;
100 static inline void aout_FifoPush( struct aout_instance_t * p_aout,
101 aout_fifo_t * p_fifo,
102 aout_buffer_t * p_buffer )
104 vlc_mutex_lock( &p_fifo->lock );
105 *p_fifo->pp_last = p_buffer;
106 p_fifo->pp_last = &p_buffer->p_next;
107 *p_fifo->pp_last = NULL;
108 vlc_mutex_unlock( &p_fifo->lock );
111 /* This function supposes there is one buffer in p_fifo. */
112 static inline aout_buffer_t * aout_FifoPop( struct aout_instance_t * p_aout,
113 aout_fifo_t * p_fifo )
115 aout_buffer_t * p_buffer;
116 vlc_mutex_lock( &p_fifo->lock );
117 p_buffer = p_fifo->p_first;
118 p_fifo->p_first = p_buffer->p_next;
119 if ( p_fifo->p_first == NULL )
121 p_fifo->pp_last = &p_fifo->p_first;
123 vlc_mutex_unlock( &p_fifo->lock );
128 static inline void aout_FifoDestroy( struct aout_instance_t * p_aout,
129 aout_fifo_t * p_fifo )
131 aout_buffer_t * p_buffer;
133 vlc_mutex_destroy( &p_fifo->lock );
134 p_buffer = p_fifo->p_first;
135 while ( p_buffer != NULL )
137 aout_buffer_t * p_next = p_buffer->p_next;
138 aout_BufferFree( p_buffer );
143 /*****************************************************************************
144 * aout_filter_t : audio output filter
145 *****************************************************************************/
146 typedef struct aout_filter_t
150 audio_sample_format_t input;
151 audio_sample_format_t output;
152 aout_alloc_t output_alloc;
155 struct aout_filter_sys_t * p_sys;
156 void (* pf_do_work)( struct aout_instance_t *,
157 struct aout_filter_t *,
158 struct aout_buffer_t *,
159 struct aout_buffer_t * );
160 vlc_bool_t b_in_place;
163 /*****************************************************************************
164 * aout_mixer_t : audio output mixer
165 *****************************************************************************/
166 typedef struct aout_mixer_t
168 audio_sample_format_t input;
169 audio_sample_format_t output;
170 aout_alloc_t output_alloc;
173 struct aout_mixer_sys_t * p_sys;
174 void (* pf_do_work)( struct aout_instance_t *,
175 struct aout_buffer_t * );
178 /*****************************************************************************
179 * aout_input_t : input stream for the audio output
180 *****************************************************************************/
183 audio_sample_format_t input;
184 aout_alloc_t input_alloc;
187 aout_filter_t * pp_filters[AOUT_MAX_FILTERS];
192 mtime_t next_packet_date;
193 byte_t * p_first_byte_to_mix;
196 /*****************************************************************************
197 * aout_output_t : output stream for the audio output
198 *****************************************************************************/
199 typedef struct aout_output_t
201 audio_sample_format_t output;
204 aout_filter_t * pp_filters[AOUT_MAX_FILTERS];
210 struct module_t * p_module;
211 struct aout_sys_t * p_sys;
212 int (* pf_setformat)( aout_instance_t * );
213 void (* pf_play)( aout_instance_t *, aout_buffer_t * );
217 /*****************************************************************************
218 * aout_instance_t : audio output thread descriptor
219 *****************************************************************************/
220 struct aout_instance_t
224 /* Input streams & pre-filters */
225 vlc_mutex_t input_lock;
226 vlc_cond_t input_signal;
228 vlc_bool_t b_change_requested;
229 aout_input_t * pp_inputs[AOUT_MAX_INPUTS];
233 vlc_mutex_t mixer_lock;
234 vlc_cond_t mixer_signal;
235 vlc_bool_t b_mixer_active;
239 aout_output_t output;
242 /*****************************************************************************
244 *****************************************************************************/
245 void aout_InputPlay( aout_instance_t * p_aout, aout_input_t * p_input,
246 aout_buffer_t * p_buffer );
248 int aout_FiltersCreatePipeline( aout_instance_t * p_aout,
249 aout_filter_t ** pp_filters,
251 audio_sample_format_t * p_input_format,
252 audio_sample_format_t * p_output_format );
253 void aout_FiltersDestroyPipeline( aout_instance_t * p_aout,
254 aout_filter_t ** pp_filters,
256 void aout_FiltersHintBuffers( aout_instance_t * p_aout,
257 aout_filter_t ** pp_filters,
258 int i_nb_filters, aout_alloc_t * p_first_alloc );
259 void aout_FiltersPlay( aout_instance_t * p_aout,
260 aout_filter_t ** pp_filters,
261 int i_nb_filters, aout_buffer_t ** pp_input_buffer );
263 int aout_MixerNew( aout_instance_t * p_aout );
264 void aout_MixerDelete( aout_instance_t * p_aout );
265 void aout_MixerRun( aout_instance_t * p_aout );
267 int aout_OutputNew( aout_instance_t * p_aout,
268 audio_sample_format_t * p_format );
269 void aout_OutputPlay( aout_instance_t * p_aout, aout_buffer_t * p_buffer );
270 void aout_OutputDelete( aout_instance_t * p_aout );