1 /* Copyright 2015 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 */
5
6 #include <errno.h>
7 #include <stdint.h>
8 #include <sys/param.h>
9
10 #include "cras_client.h"
11 #include "cras_util.h"
12
13 struct buffer_data {
14 const uint8_t *buffer;
15 unsigned int offset;
16 unsigned int frame_bytes;
17 unsigned int len;
18 };
19
20 static int
play_buffer_callback(struct cras_client * client,cras_stream_id_t stream_id,uint8_t * captured_samples,uint8_t * playback_samples,unsigned int frames,const struct timespec * captured_time,const struct timespec * playback_time,void * user_arg)21 play_buffer_callback(struct cras_client *client, cras_stream_id_t stream_id,
22 uint8_t *captured_samples, uint8_t *playback_samples,
23 unsigned int frames, const struct timespec *captured_time,
24 const struct timespec *playback_time, void *user_arg)
25 {
26 struct buffer_data *data = (struct buffer_data *)user_arg;
27 int to_copy = data->len - data->offset;
28
29 if (to_copy <= 0) {
30 free(user_arg);
31 return EOF;
32 }
33
34 to_copy = MIN(to_copy, frames * data->frame_bytes);
35
36 memcpy(playback_samples, data->buffer + data->offset, to_copy);
37
38 data->offset += to_copy;
39
40 return to_copy / data->frame_bytes;
41 }
42
play_buffer_error(struct cras_client * client,cras_stream_id_t stream_id,int error,void * user_arg)43 static int play_buffer_error(struct cras_client *client,
44 cras_stream_id_t stream_id, int error,
45 void *user_arg)
46 {
47 free(user_arg);
48 return 0;
49 }
50
cras_helper_create_connect_async(struct cras_client ** client,cras_connection_status_cb_t connection_cb,void * user_arg)51 int cras_helper_create_connect_async(struct cras_client **client,
52 cras_connection_status_cb_t connection_cb,
53 void *user_arg)
54 {
55 int rc;
56
57 rc = cras_client_create(client);
58 if (rc < 0)
59 return rc;
60
61 cras_client_set_connection_status_cb(*client, connection_cb, user_arg);
62
63 rc = cras_client_run_thread(*client);
64 if (rc < 0)
65 goto client_start_error;
66
67 rc = cras_client_connect_async(*client);
68 if (rc < 0)
69 goto client_start_error;
70
71 return 0;
72
73 client_start_error:
74 cras_client_destroy(*client);
75 return rc;
76 }
77
cras_helper_create_connect(struct cras_client ** client)78 int cras_helper_create_connect(struct cras_client **client)
79 {
80 int rc;
81
82 rc = cras_client_create(client);
83 if (rc < 0)
84 return rc;
85
86 rc = cras_client_connect(*client);
87 if (rc < 0)
88 goto client_start_error;
89
90 rc = cras_client_run_thread(*client);
91 if (rc < 0)
92 goto client_start_error;
93
94 rc = cras_client_connected_wait(*client);
95 if (rc < 0)
96 goto client_start_error;
97
98 return 0;
99
100 client_start_error:
101 cras_client_destroy(*client);
102 return rc;
103 }
104
cras_helper_add_stream_simple(struct cras_client * client,enum CRAS_STREAM_DIRECTION direction,void * user_data,cras_unified_cb_t unified_cb,cras_error_cb_t err_cb,snd_pcm_format_t format,unsigned int frame_rate,unsigned int num_channels,int dev_idx,cras_stream_id_t * stream_id_out)105 int cras_helper_add_stream_simple(
106 struct cras_client *client, enum CRAS_STREAM_DIRECTION direction,
107 void *user_data, cras_unified_cb_t unified_cb, cras_error_cb_t err_cb,
108 snd_pcm_format_t format, unsigned int frame_rate,
109 unsigned int num_channels, int dev_idx, cras_stream_id_t *stream_id_out)
110 {
111 struct cras_audio_format *aud_format;
112 struct cras_stream_params *params;
113 int rc;
114
115 aud_format = cras_audio_format_create(format, frame_rate, num_channels);
116 if (!aud_format)
117 return -ENOMEM;
118
119 params = cras_client_unified_params_create(CRAS_STREAM_OUTPUT, 2048,
120 CRAS_STREAM_TYPE_DEFAULT, 0,
121 user_data, unified_cb,
122 err_cb, aud_format);
123 if (!params) {
124 rc = -ENOMEM;
125 goto done_add_stream;
126 }
127
128 if (dev_idx < 0)
129 dev_idx = NO_DEVICE;
130 rc = cras_client_add_pinned_stream(client, dev_idx, stream_id_out,
131 params);
132
133 done_add_stream:
134 cras_audio_format_destroy(aud_format);
135 cras_client_stream_params_destroy(params);
136 return rc;
137 }
138
cras_helper_play_buffer(struct cras_client * client,const void * buffer,unsigned int frames,snd_pcm_format_t format,unsigned int frame_rate,unsigned int num_channels,int dev_idx)139 int cras_helper_play_buffer(struct cras_client *client, const void *buffer,
140 unsigned int frames, snd_pcm_format_t format,
141 unsigned int frame_rate, unsigned int num_channels,
142 int dev_idx)
143 {
144 struct buffer_data *data;
145 cras_stream_id_t stream_id;
146
147 data = malloc(sizeof(*data));
148
149 data->buffer = buffer;
150 data->frame_bytes = num_channels * PCM_FORMAT_WIDTH(format) / 8;
151 data->offset = 0;
152 data->len = frames * data->frame_bytes;
153
154 return cras_helper_add_stream_simple(client, CRAS_STREAM_OUTPUT, data,
155 play_buffer_callback,
156 play_buffer_error, format,
157 frame_rate, num_channels, dev_idx,
158 &stream_id);
159 }
160