1 /* Copyright (C) 2011 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
3 /** \file afh_recv.c Receiver for streaming local files. */
9 #include "recv_cmd.lsg.h"
14 #include "buffer_tree.h"
20 struct private_afh_recv_data {
26 long unsigned first_chunk;
27 long unsigned last_chunk;
28 struct timeval stream_start;
29 uint32_t current_chunk;
33 static int afh_execute(struct btr_node *btrn, const char *cmd, char **result)
35 struct receiver_node *rn = btr_context(btrn);
36 struct private_afh_recv_data *pard = rn->private_data;
39 if (!strcmp(cmd, "seconds_total")) {
40 *result = make_message("%" PRIu32, pard->afhi.seconds_total);
43 if (!strcmp(cmd, "chunks_total")) {
44 *result = make_message("%" PRIu32, pard->afhi.chunks_total);
47 if (!strcmp(cmd, "afhi")) {
48 afh_get_afhi_txt(pard->audio_format_num, &pard->afhi, result);
51 if (!strncmp(cmd, "repos", 5)) {
53 int ret = para_atoi32(cmd + 5, &x);
56 if (x >= pard->afhi.chunks_total)
57 return -ERRNO_TO_PARA_ERROR(EINVAL);
58 pard->first_chunk = afh_get_start_chunk(x, &pard->afhi,
59 pard->audio_format_num);
60 pard->current_chunk = pard->first_chunk;
66 static int afh_recv_open(struct receiver_node *rn)
68 struct lls_parse_result *lpr = rn->lpr;
69 struct private_afh_recv_data *pard;
70 struct afh_info *afhi;
71 const char *fn = RECV_CMD_OPT_STRING_VAL(AFH, FILENAME, lpr);
72 int32_t bc = RECV_CMD_OPT_INT32_VAL(AFH, BEGIN_CHUNK, lpr);
73 const struct lls_opt_result *r_e = RECV_CMD_OPT_RESULT(AFH, END_CHUNK, lpr);
76 if (!fn || *fn == '\0')
77 return -E_AFH_RECV_BAD_FILENAME;
78 rn->private_data = pard = para_calloc(sizeof(*pard));
80 ret = mmap_full_file(fn, O_RDONLY, &pard->map,
81 &pard->map_size, &pard->fd);
84 ret = compute_afhi(fn, pard->map, pard->map_size,
88 pard->audio_format_num = ret;
89 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
90 if (afhi->chunks_total == 0)
92 if (PARA_ABS(bc) >= afhi->chunks_total)
95 pard->first_chunk = afh_get_start_chunk(bc, &pard->afhi,
96 pard->audio_format_num);
98 pard->first_chunk = afh_get_start_chunk(afhi->chunks_total + bc,
99 &pard->afhi, pard->audio_format_num);
100 if (lls_opt_given(r_e)) {
101 int32_t ec = lls_int32_val(0, r_e);
102 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
103 if (PARA_ABS(ec) > afhi->chunks_total)
106 pard->last_chunk = ec;
108 pard->last_chunk = afhi->chunks_total + ec;
110 pard->last_chunk = afhi->chunks_total - 1;
111 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
112 if (pard->first_chunk >= pard->last_chunk)
114 pard->current_chunk = pard->first_chunk;
115 return pard->audio_format_num;
119 para_munmap(pard->map, pard->map_size);
122 freep(&rn->private_data);
126 static void afh_recv_close(struct receiver_node *rn)
128 struct private_afh_recv_data *pard;
130 if (!rn || !rn->private_data)
132 pard = rn->private_data;
133 clear_afhi(&pard->afhi);
134 para_munmap(pard->map, pard->map_size);
136 afh_close(pard->afh_context, pard->audio_format_num);
137 freep(&rn->private_data);
140 static void afh_recv_pre_select(struct sched *s, void *context)
142 struct receiver_node *rn = context;
143 struct private_afh_recv_data *pard = rn->private_data;
144 struct afh_info *afhi = &pard->afhi;
145 struct lls_parse_result *lpr = rn->lpr;
146 struct timeval chunk_time;
147 int state = generic_recv_pre_select(s, rn);
148 unsigned j_given = RECV_CMD_OPT_GIVEN(AFH, JUST_IN_TIME, lpr);
156 compute_chunk_time(pard->current_chunk - pard->first_chunk,
157 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
158 sched_request_barrier_or_min_delay(&chunk_time, s);
161 static int afh_recv_post_select(__a_unused struct sched *s, void *context)
163 struct receiver_node *rn = context;
164 struct lls_parse_result *lpr = rn->lpr;
165 struct private_afh_recv_data *pard = rn->private_data;
166 struct btr_node *btrn = rn->btrn;
167 struct afh_info *afhi = &pard->afhi;
172 struct timeval chunk_time;
173 unsigned j_given = RECV_CMD_OPT_GIVEN(AFH, JUST_IN_TIME, lpr);
174 unsigned H_given = RECV_CMD_OPT_GIVEN(AFH, NO_HEADER, lpr);
176 ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
179 if (pard->first_chunk > 0 && !H_given) {
181 afh_get_header(afhi, pard->audio_format_num, pard->map,
182 pard->map_size, &header, &size);
184 PARA_INFO_LOG("writing header (%zu bytes)\n", size);
185 buf = para_malloc(size);
186 memcpy(buf, header, size);
187 btr_add_output(buf, size, btrn);
188 afh_free_header(header, pard->audio_format_num);
193 for (n = pard->first_chunk; n < pard->last_chunk; n++) {
194 ret = afh_get_chunk(n, afhi, pard->audio_format_num,
195 pard->map, pard->map_size, &start, &size,
199 PARA_DEBUG_LOG("adding %zu bytes\n", size);
200 btr_add_output_dont_free(start, size, btrn);
205 if (pard->current_chunk == pard->first_chunk)
206 pard->stream_start = *now;
208 compute_chunk_time(pard->current_chunk - pard->first_chunk,
209 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
210 ret = tv_diff(&chunk_time, now, NULL);
214 ret = afh_get_chunk(pard->current_chunk, afhi,
215 pard->audio_format_num, pard->map,
216 pard->map_size, &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) {
226 pard->current_chunk++;
230 btr_remove_node(&rn->btrn);
231 pard->current_chunk = pard->first_chunk;
236 /** See \ref recv_init(). */
237 const struct receiver lsg_recv_cmd_com_afh_user_data = {
239 .open = afh_recv_open,
240 .close = afh_recv_close,
241 .pre_select = afh_recv_pre_select,
242 .post_select = afh_recv_post_select,
243 .execute = afh_execute,