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code.delx.au - pulseaudio/blob - polyp/sink-input.c
4 This file is part of polypaudio.
6 polypaudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published
8 by the Free Software Foundation; either version 2 of the License,
9 or (at your option) any later version.
11 polypaudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with polypaudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
31 #include "sink-input.h"
32 #include "sample-util.h"
35 #define CONVERT_BUFFER_LENGTH 4096
37 struct pa_sink_input
* pa_sink_input_new(struct pa_sink
*s
, const char *name
, const struct pa_sample_spec
*spec
) {
38 struct pa_sink_input
*i
;
39 struct pa_resampler
*resampler
= NULL
;
44 if (!pa_sample_spec_equal(spec
, &s
->sample_spec
))
45 if (!(resampler
= pa_resampler_new(spec
, &s
->sample_spec
)))
48 i
= pa_xmalloc(sizeof(struct pa_sink_input
));
49 i
->name
= pa_xstrdup(name
);
53 i
->sample_spec
= *spec
;
58 i
->get_latency
= NULL
;
61 i
->volume
= PA_VOLUME_NORM
;
63 i
->resampled_chunk
.memblock
= NULL
;
64 i
->resampled_chunk
.index
= i
->resampled_chunk
.length
= 0;
65 i
->resampler
= resampler
;
68 r
= pa_idxset_put(s
->core
->sink_inputs
, i
, &i
->index
);
69 assert(r
== 0 && i
->index
!= PA_IDXSET_INVALID
);
70 r
= pa_idxset_put(s
->inputs
, i
, NULL
);
73 pa_sample_snprint(st
, sizeof(st
), spec
);
74 fprintf(stderr
, "sink-input: created %u \"%s\" on %u with sample spec \"%s\"\n", i
->index
, i
->name
, s
->index
, st
);
79 void pa_sink_input_free(struct pa_sink_input
* i
) {
82 assert(i
->sink
&& i
->sink
->core
);
83 pa_idxset_remove_by_data(i
->sink
->core
->sink_inputs
, i
, NULL
);
84 pa_idxset_remove_by_data(i
->sink
->inputs
, i
, NULL
);
86 if (i
->resampled_chunk
.memblock
)
87 pa_memblock_unref(i
->resampled_chunk
.memblock
);
89 pa_resampler_free(i
->resampler
);
95 void pa_sink_input_kill(struct pa_sink_input
*i
) {
102 uint32_t pa_sink_input_get_latency(struct pa_sink_input
*i
) {
107 l
+= i
->get_latency(i
);
110 l
+= pa_sink_get_latency(i
->sink
);
115 int pa_sink_input_peek(struct pa_sink_input
*i
, struct pa_memchunk
*chunk
) {
116 assert(i
&& chunk
&& i
->peek
&& i
->drop
);
119 return i
->peek(i
, chunk
);
121 if (!i
->resampled_chunk
.memblock
) {
122 struct pa_memchunk tchunk
;
126 if ((ret
= i
->peek(i
, &tchunk
)) < 0)
129 assert(tchunk
.length
);
131 l
= pa_resampler_request(i
->resampler
, CONVERT_BUFFER_LENGTH
);
132 if (tchunk
.length
> l
)
135 i
->drop(i
, tchunk
.length
);
137 pa_resampler_run(i
->resampler
, &tchunk
, &i
->resampled_chunk
);
138 pa_memblock_unref(tchunk
.memblock
);
141 assert(i
->resampled_chunk
.memblock
&& i
->resampled_chunk
.length
);
142 *chunk
= i
->resampled_chunk
;
143 pa_memblock_ref(i
->resampled_chunk
.memblock
);
147 void pa_sink_input_drop(struct pa_sink_input
*i
, size_t length
) {
155 assert(i
->resampled_chunk
.memblock
&& i
->resampled_chunk
.length
>= length
);
157 i
->resampled_chunk
.index
+= length
;
158 i
->resampled_chunk
.length
-= length
;
160 if (!i
->resampled_chunk
.length
) {
161 pa_memblock_unref(i
->resampled_chunk
.memblock
);
162 i
->resampled_chunk
.memblock
= NULL
;
163 i
->resampled_chunk
.index
= i
->resampled_chunk
.length
= 0;