2 * Copyright (C) 2011 Andre Noll <maan@tuebingen.mpg.de>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file afh_recv.c Receiver for streaming local files. */
10 #include <sys/types.h>
17 #include "buffer_tree.h"
19 #include "afh_recv.cmdline.h"
24 struct private_afh_recv_data {
30 long unsigned first_chunk;
31 long unsigned last_chunk;
32 struct timeval stream_start;
33 uint32_t current_chunk;
37 static int afh_execute(struct btr_node *btrn, const char *cmd, char **result)
39 struct receiver_node *rn = btr_context(btrn);
40 struct private_afh_recv_data *pard = rn->private_data;
43 if (!strcmp(cmd, "seconds_total")) {
44 *result = make_message("%" PRIu32, pard->afhi.seconds_total);
47 if (!strcmp(cmd, "chunks_total")) {
48 *result = make_message("%" PRIu32, pard->afhi.chunks_total);
51 if (!strcmp(cmd, "afhi")) {
52 afh_get_afhi_txt(pard->audio_format_num, &pard->afhi, result);
55 if (!strncmp(cmd, "repos", 5)) {
57 int ret = para_atoi32(cmd + 5, &x);
60 if (x >= pard->afhi.chunks_total)
61 return -ERRNO_TO_PARA_ERROR(EINVAL);
62 pard->first_chunk = afh_get_start_chunk(x, &pard->afhi,
63 pard->audio_format_num);
64 pard->current_chunk = pard->first_chunk;
70 static void *afh_recv_parse_config(int argc, char **argv)
72 struct afh_recv_args_info *tmp = para_calloc(sizeof(*tmp));
74 afh_recv_cmdline_parser(argc, argv, tmp);
78 static void afh_recv_free_config(void *conf)
82 afh_recv_cmdline_parser_free(conf);
86 static int afh_recv_open(struct receiver_node *rn)
88 struct afh_recv_args_info *conf = rn->conf;
89 struct private_afh_recv_data *pard;
90 struct afh_info *afhi;
91 char *filename = conf->filename_arg;
95 if (!filename || *filename == '\0')
96 return -E_AFH_RECV_BAD_FILENAME;
97 rn->private_data = pard = para_calloc(sizeof(*pard));
99 ret = mmap_full_file(filename, O_RDONLY, &pard->map,
100 &pard->map_size, &pard->fd);
103 ret = compute_afhi(filename, pard->map, pard->map_size,
107 pard->audio_format_num = ret;
108 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
109 if (afhi->chunks_total == 0)
111 if (PARA_ABS(conf->begin_chunk_arg) >= afhi->chunks_total)
113 if (conf->begin_chunk_arg >= 0)
114 pard->first_chunk = afh_get_start_chunk(
115 conf->begin_chunk_arg, &pard->afhi,
116 pard->audio_format_num);
118 pard->first_chunk = afh_get_start_chunk(
119 afhi->chunks_total + conf->begin_chunk_arg,
120 &pard->afhi, pard->audio_format_num);
121 if (conf->end_chunk_given) {
122 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
123 if (PARA_ABS(conf->end_chunk_arg) > afhi->chunks_total)
125 if (conf->end_chunk_arg >= 0)
126 pard->last_chunk = conf->end_chunk_arg;
128 pard->last_chunk = afhi->chunks_total + conf->end_chunk_arg;
130 pard->last_chunk = afhi->chunks_total - 1;
131 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
132 if (pard->first_chunk >= pard->last_chunk)
134 pard->current_chunk = pard->first_chunk;
135 return pard->audio_format_num;
139 para_munmap(pard->map, pard->map_size);
142 freep(&rn->private_data);
146 static void afh_recv_close(struct receiver_node *rn)
148 struct private_afh_recv_data *pard;
150 if (!rn || !rn->private_data)
152 pard = rn->private_data;
153 clear_afhi(&pard->afhi);
154 para_munmap(pard->map, pard->map_size);
156 afh_close(pard->afh_context, pard->audio_format_num);
157 freep(&rn->private_data);
160 static void afh_recv_pre_select(struct sched *s, void *context)
162 struct receiver_node *rn = context;
163 struct private_afh_recv_data *pard = rn->private_data;
164 struct afh_info *afhi = &pard->afhi;
165 struct afh_recv_args_info *conf = rn->conf;
166 struct timeval chunk_time;
167 int state = generic_recv_pre_select(s, rn);
171 if (!conf->just_in_time_given) {
175 compute_chunk_time(pard->current_chunk - pard->first_chunk,
176 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
177 sched_request_barrier_or_min_delay(&chunk_time, s);
180 static int afh_recv_post_select(__a_unused struct sched *s, void *context)
182 struct receiver_node *rn = context;
183 struct afh_recv_args_info *conf = rn->conf;
184 struct private_afh_recv_data *pard = rn->private_data;
185 struct btr_node *btrn = rn->btrn;
186 struct afh_info *afhi = &pard->afhi;
191 struct timeval chunk_time;
193 ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
196 if (pard->first_chunk > 0 && !conf->no_header_given) {
198 afh_get_header(afhi, pard->audio_format_num, pard->map,
199 pard->map_size, &header, &size);
201 PARA_INFO_LOG("writing header (%zu bytes)\n", size);
202 buf = para_malloc(size);
203 memcpy(buf, header, size);
204 btr_add_output(buf, size, btrn);
205 afh_free_header(header, pard->audio_format_num);
208 if (!conf->just_in_time_given) {
210 for (n = pard->first_chunk; n < pard->last_chunk; n++) {
211 ret = afh_get_chunk(n, afhi, pard->audio_format_num,
212 pard->map, pard->map_size, &start, &size,
216 PARA_INFO_LOG("adding %zu bytes\n", size);
217 btr_add_output_dont_free(start, size, btrn);
222 if (pard->current_chunk == pard->first_chunk)
223 pard->stream_start = *now;
225 compute_chunk_time(pard->current_chunk - pard->first_chunk,
226 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
227 ret = tv_diff(&chunk_time, now, NULL);
231 ret = afh_get_chunk(pard->current_chunk, afhi,
232 pard->audio_format_num, pard->map,
233 pard->map_size, &start, &size,
235 PARA_DEBUG_LOG("adding chunk %u\n", pard->current_chunk);
236 btr_add_output_dont_free(start, size, btrn);
237 if (pard->current_chunk >= pard->last_chunk) {
241 pard->current_chunk++;
245 btr_remove_node(&rn->btrn);
246 pard->current_chunk = pard->first_chunk;
252 * The init function of the afh receiver.
254 * \param r Pointer to the receiver struct to initialize.
256 * This initializes all function pointers of \a r.
258 void afh_recv_init(struct receiver *r)
260 struct afh_recv_args_info dummy;
263 afh_recv_cmdline_parser_init(&dummy);
264 r->open = afh_recv_open;
265 r->close = afh_recv_close;
266 r->pre_select = afh_recv_pre_select;
267 r->post_select = afh_recv_post_select;
268 r->parse_config = afh_recv_parse_config;
269 r->free_config = afh_recv_free_config;
270 r->execute = afh_execute;
271 r->help = (struct ggo_help)DEFINE_GGO_HELP(afh_recv);
272 afh_recv_cmdline_parser_free(&dummy);