sched: Directly pass context pointer to pre/post_select().
[paraslash.git] / afh_recv.c
1 /*
2 * Copyright (C) 2011-2014 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file afh_recv.c Receiver for streaming local files. */
8
9 #include <regex.h>
10 #include <sys/types.h>
11 #include <stdbool.h>
12
13 #include "para.h"
14 #include "error.h"
15 #include "list.h"
16 #include "sched.h"
17 #include "ggo.h"
18 #include "buffer_tree.h"
19 #include "recv.h"
20 #include "afh_recv.cmdline.h"
21 #include "string.h"
22 #include "fd.h"
23 #include "afh.h"
24
25 struct private_afh_recv_data {
26 int fd;
27 void *map;
28 size_t map_size;
29 struct afh_info afhi;
30 int audio_format_num;
31 long unsigned first_chunk;
32 long unsigned last_chunk;
33 struct timeval stream_start;
34 uint32_t current_chunk;
35 };
36
37 static int afh_execute(struct btr_node *btrn, const char *cmd, char **result)
38 {
39 struct receiver_node *rn = btr_context(btrn);
40 struct private_afh_recv_data *pard = rn->private_data;
41
42 *result = NULL;
43 if (!strcmp(cmd, "seconds_total")) {
44 *result = make_message("%lu", pard->afhi.seconds_total);
45 return 1;
46 }
47 if (!strcmp(cmd, "chunks_total")) {
48 *result = make_message("%lu", pard->afhi.chunks_total);
49 return 1;
50 }
51 if (!strcmp(cmd, "afhi")) {
52 afh_get_afhi_txt(pard->audio_format_num, &pard->afhi, result);
53 return 1;
54 }
55 if (!strncmp(cmd, "repos", 5)) {
56 int32_t x;
57 int ret = para_atoi32(cmd + 5, &x);
58 if (ret < 0)
59 return ret;
60 if (x >= pard->afhi.chunks_total)
61 return -ERRNO_TO_PARA_ERROR(EINVAL);
62 pard->first_chunk = pard->current_chunk = x;
63 return 1;
64 }
65 return -E_BTR_NAVAIL;
66 }
67
68 static void *afh_recv_parse_config(int argc, char **argv)
69 {
70 struct afh_recv_args_info *tmp = para_calloc(sizeof(*tmp));
71
72 afh_recv_cmdline_parser(argc, argv, tmp);
73 return tmp;
74 }
75
76 static void afh_recv_free_config(void *conf)
77 {
78 if (!conf)
79 return;
80 afh_recv_cmdline_parser_free(conf);
81 free(conf);
82 }
83
84 static int afh_recv_open(struct receiver_node *rn)
85 {
86 struct afh_recv_args_info *conf = rn->conf;
87 struct private_afh_recv_data *pard;
88 struct afh_info *afhi;
89 char *filename = conf->filename_arg;
90
91 int ret;
92
93 if (!filename || *filename == '\0')
94 return -E_AFH_RECV_BAD_FILENAME;
95 rn->private_data = pard = para_calloc(sizeof(*pard));
96 afhi = &pard->afhi;
97 ret = mmap_full_file(filename, O_RDONLY, &pard->map,
98 &pard->map_size, &pard->fd);
99 if (ret < 0)
100 goto out;
101 ret = compute_afhi(filename, pard->map, pard->map_size,
102 pard->fd, afhi);
103 if (ret < 0)
104 goto out_unmap;
105 pard->audio_format_num = ret;
106 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
107 if (afhi->chunks_total == 0)
108 goto out_clear_afhi;
109 if (PARA_ABS(conf->begin_chunk_arg) >= afhi->chunks_total)
110 goto out_clear_afhi;
111 if (conf->begin_chunk_arg >= 0)
112 pard->first_chunk = conf->begin_chunk_arg;
113 else
114 pard->first_chunk = afhi->chunks_total + conf->begin_chunk_arg;
115 if (conf->end_chunk_given) {
116 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
117 if (PARA_ABS(conf->end_chunk_arg) > afhi->chunks_total)
118 goto out_clear_afhi;
119 if (conf->end_chunk_arg >= 0)
120 pard->last_chunk = conf->end_chunk_arg;
121 else
122 pard->last_chunk = afhi->chunks_total + conf->end_chunk_arg;
123 } else
124 pard->last_chunk = afhi->chunks_total - 1;
125 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
126 if (pard->first_chunk >= pard->last_chunk)
127 goto out_clear_afhi;
128 pard->current_chunk = pard->first_chunk;
129 return pard->audio_format_num;
130 out_clear_afhi:
131 clear_afhi(afhi);
132 out_unmap:
133 para_munmap(pard->map, pard->map_size);
134 close(pard->fd);
135 out:
136 freep(&rn->private_data);
137 return ret;
138 }
139
140 static void afh_recv_close(struct receiver_node *rn)
141 {
142 struct private_afh_recv_data *pard;
143
144 if (!rn || !rn->private_data)
145 return;
146 pard = rn->private_data;
147 clear_afhi(&pard->afhi);
148 para_munmap(pard->map, pard->map_size);
149 close(pard->fd);
150 freep(&rn->private_data);
151 }
152
153 static void afh_recv_pre_select(struct sched *s, void *context)
154 {
155 struct receiver_node *rn = context;
156 struct private_afh_recv_data *pard = rn->private_data;
157 struct afh_info *afhi = &pard->afhi;
158 struct afh_recv_args_info *conf = rn->conf;
159 struct timeval chunk_time;
160 int state = generic_recv_pre_select(s, rn);
161
162 if (state <= 0)
163 return;
164 if (!conf->just_in_time_given) {
165 sched_min_delay(s);
166 return;
167 }
168 compute_chunk_time(pard->current_chunk - pard->first_chunk,
169 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
170 sched_request_barrier_or_min_delay(&chunk_time, s);
171 }
172
173 static int afh_recv_post_select(__a_unused struct sched *s, void *context)
174 {
175 struct receiver_node *rn = context;
176 struct afh_recv_args_info *conf = rn->conf;
177 struct private_afh_recv_data *pard = rn->private_data;
178 struct btr_node *btrn = rn->btrn;
179 struct afh_info *afhi = &pard->afhi;
180 int ret;
181 char *buf;
182 const char *start, *end;
183 size_t size;
184 struct timeval chunk_time;
185
186 ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
187 if (ret <= 0)
188 goto out;
189 if (pard->first_chunk > 0 && !conf->no_header_given) {
190 char *header;
191 afh_get_header(afhi, pard->audio_format_num, pard->map,
192 pard->map_size, &header, &size);
193 if (size > 0) {
194 PARA_INFO_LOG("writing header (%zu bytes)\n", size);
195 buf = para_malloc(size);
196 memcpy(buf, header, size);
197 btr_add_output(buf, size, btrn);
198 afh_free_header(header, pard->audio_format_num);
199 }
200 }
201 if (!conf->just_in_time_given) {
202 afh_get_chunk(pard->first_chunk, afhi, pard->map, &start, &size);
203 afh_get_chunk(pard->last_chunk, afhi, pard->map, &end, &size);
204 end += size;
205 PARA_INFO_LOG("adding %zu bytes\n", end - start);
206 btr_add_output_dont_free(start, end - start, btrn);
207 ret = -E_RECV_EOF;
208 goto out;
209 }
210 if (pard->current_chunk == pard->first_chunk)
211 pard->stream_start = *now;
212 else {
213 compute_chunk_time(pard->current_chunk - pard->first_chunk,
214 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
215 ret = tv_diff(&chunk_time, now, NULL);
216 if (ret > 0)
217 goto out;
218 }
219 afh_get_chunk(pard->current_chunk, afhi, pard->map, &start, &size);
220 PARA_DEBUG_LOG("adding chunk %u\n", pard->current_chunk);
221 btr_add_output_dont_free(start, size, btrn);
222 if (pard->current_chunk >= pard->last_chunk) {
223 ret = -E_RECV_EOF;
224 goto out;
225 }
226 pard->current_chunk++;
227 ret = 1;
228 out:
229 if (ret < 0) {
230 btr_remove_node(&rn->btrn);
231 pard->current_chunk = pard->first_chunk;
232 }
233 return ret;
234 }
235
236 /**
237 * The init function of the afh receiver.
238 *
239 * \param r Pointer to the receiver struct to initialize.
240 *
241 * This initializes all function pointers of \a r.
242 */
243 void afh_recv_init(struct receiver *r)
244 {
245 struct afh_recv_args_info dummy;
246
247 afh_init();
248 afh_recv_cmdline_parser_init(&dummy);
249 r->open = afh_recv_open;
250 r->close = afh_recv_close;
251 r->pre_select = afh_recv_pre_select;
252 r->post_select = afh_recv_post_select;
253 r->parse_config = afh_recv_parse_config;
254 r->free_config = afh_recv_free_config;
255 r->execute = afh_execute;
256 r->help = (struct ggo_help)DEFINE_GGO_HELP(afh_recv);
257 afh_recv_cmdline_parser_free(&dummy);
258 }