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>
13 #include "recv_cmd.lsg.h"
18 #include "buffer_tree.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 int afh_recv_open(struct receiver_node *rn)
72 struct lls_parse_result *lpr = rn->lpr;
73 struct private_afh_recv_data *pard;
74 struct afh_info *afhi;
75 const char *fn = RECV_CMD_OPT_STRING_VAL(AFH, FILENAME, lpr);
76 int32_t bc = RECV_CMD_OPT_INT32_VAL(AFH, BEGIN_CHUNK, lpr);
77 const struct lls_opt_result *r_e = RECV_CMD_OPT_RESULT(AFH, END_CHUNK, lpr);
80 if (!fn || *fn == '\0')
81 return -E_AFH_RECV_BAD_FILENAME;
82 rn->private_data = pard = para_calloc(sizeof(*pard));
84 ret = mmap_full_file(fn, O_RDONLY, &pard->map,
85 &pard->map_size, &pard->fd);
88 ret = compute_afhi(fn, pard->map, pard->map_size,
92 pard->audio_format_num = ret;
93 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
94 if (afhi->chunks_total == 0)
96 if (PARA_ABS(bc) >= afhi->chunks_total)
99 pard->first_chunk = afh_get_start_chunk(bc, &pard->afhi,
100 pard->audio_format_num);
102 pard->first_chunk = afh_get_start_chunk(afhi->chunks_total + bc,
103 &pard->afhi, pard->audio_format_num);
104 if (lls_opt_given(r_e)) {
105 int32_t ec = lls_int32_val(0, r_e);
106 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
107 if (PARA_ABS(ec) > afhi->chunks_total)
110 pard->last_chunk = ec;
112 pard->last_chunk = afhi->chunks_total + ec;
114 pard->last_chunk = afhi->chunks_total - 1;
115 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
116 if (pard->first_chunk >= pard->last_chunk)
118 pard->current_chunk = pard->first_chunk;
119 return pard->audio_format_num;
123 para_munmap(pard->map, pard->map_size);
126 freep(&rn->private_data);
130 static void afh_recv_close(struct receiver_node *rn)
132 struct private_afh_recv_data *pard;
134 if (!rn || !rn->private_data)
136 pard = rn->private_data;
137 clear_afhi(&pard->afhi);
138 para_munmap(pard->map, pard->map_size);
140 afh_close(pard->afh_context, pard->audio_format_num);
141 freep(&rn->private_data);
144 static void afh_recv_pre_select(struct sched *s, void *context)
146 struct receiver_node *rn = context;
147 struct private_afh_recv_data *pard = rn->private_data;
148 struct afh_info *afhi = &pard->afhi;
149 struct lls_parse_result *lpr = rn->lpr;
150 struct timeval chunk_time;
151 int state = generic_recv_pre_select(s, rn);
152 unsigned j_given = RECV_CMD_OPT_GIVEN(AFH, JUST_IN_TIME, lpr);
160 compute_chunk_time(pard->current_chunk - pard->first_chunk,
161 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
162 sched_request_barrier_or_min_delay(&chunk_time, s);
165 static int afh_recv_post_select(__a_unused struct sched *s, void *context)
167 struct receiver_node *rn = context;
168 struct lls_parse_result *lpr = rn->lpr;
169 struct private_afh_recv_data *pard = rn->private_data;
170 struct btr_node *btrn = rn->btrn;
171 struct afh_info *afhi = &pard->afhi;
176 struct timeval chunk_time;
177 unsigned j_given = RECV_CMD_OPT_GIVEN(AFH, JUST_IN_TIME, lpr);
178 unsigned H_given = RECV_CMD_OPT_GIVEN(AFH, NO_HEADER, lpr);
180 ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
183 if (pard->first_chunk > 0 && !H_given) {
185 afh_get_header(afhi, pard->audio_format_num, pard->map,
186 pard->map_size, &header, &size);
188 PARA_INFO_LOG("writing header (%zu bytes)\n", size);
189 buf = para_malloc(size);
190 memcpy(buf, header, size);
191 btr_add_output(buf, size, btrn);
192 afh_free_header(header, pard->audio_format_num);
197 for (n = pard->first_chunk; n < pard->last_chunk; n++) {
198 ret = afh_get_chunk(n, afhi, pard->audio_format_num,
199 pard->map, pard->map_size, &start, &size,
203 PARA_INFO_LOG("adding %zu bytes\n", size);
204 btr_add_output_dont_free(start, size, btrn);
209 if (pard->current_chunk == pard->first_chunk)
210 pard->stream_start = *now;
212 compute_chunk_time(pard->current_chunk - pard->first_chunk,
213 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
214 ret = tv_diff(&chunk_time, now, NULL);
218 ret = afh_get_chunk(pard->current_chunk, afhi,
219 pard->audio_format_num, pard->map,
220 pard->map_size, &start, &size,
224 PARA_DEBUG_LOG("adding chunk %u\n", pard->current_chunk);
225 btr_add_output_dont_free(start, size, btrn);
226 if (pard->current_chunk >= pard->last_chunk) {
230 pard->current_chunk++;
234 btr_remove_node(&rn->btrn);
235 pard->current_chunk = pard->first_chunk;
240 /** See \ref recv_init(). */
241 const struct receiver lsg_recv_cmd_com_afh_user_data = {
243 .open = afh_recv_open,
244 .close = afh_recv_close,
245 .pre_select = afh_recv_pre_select,
246 .post_select = afh_recv_post_select,
247 .execute = afh_execute,