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 = afh_get_start_chunk(x, &pard->afhi);
  63                 pard->current_chunk = pard->first_chunk;
  64                 rn->task.error = 0;
  65                 return 1;
  66         }
  67         return -E_BTR_NAVAIL;
  68 }
  69
  70 static void *afh_recv_parse_config(int argc, char **argv)
  71 {
  72         struct afh_recv_args_info *tmp = para_calloc(sizeof(*tmp));
  73
  74         afh_recv_cmdline_parser(argc, argv, tmp);
  75         return tmp;
  76 }
  77
  78 static void afh_recv_free_config(void *conf)
  79 {
  80         if (!conf)
  81                 return;
  82         afh_recv_cmdline_parser_free(conf);
  83         free(conf);
  84 }
  85
  86 static int afh_recv_open(struct receiver_node *rn)
  87 {
  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;
  92
  93         int ret;
  94
  95         if (!filename || *filename == '\0')
  96                 return -E_AFH_RECV_BAD_FILENAME;
  97         rn->private_data = pard = para_calloc(sizeof(*pard));
  98         afhi = &pard->afhi;
  99         ret = mmap_full_file(filename, O_RDONLY, &pard->map,
 100                 &pard->map_size, &pard->fd);
 101         if (ret < 0)
 102                 goto out;
 103         ret = compute_afhi(filename, pard->map, pard->map_size,
 104                 pard->fd, afhi);
 105         if (ret < 0)
 106                 goto out_unmap;
 107         pard->audio_format_num = ret;
 108         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 109         if (afhi->chunks_total == 0)
 110                 goto out_clear_afhi;
 111         if (PARA_ABS(conf->begin_chunk_arg) >= afhi->chunks_total)
 112                 goto out_clear_afhi;
 113         if (conf->begin_chunk_arg >= 0)
 114                 pard->first_chunk = afh_get_start_chunk(
 115                         conf->begin_chunk_arg, &pard->afhi);
 116         else
 117                 pard->first_chunk = afh_get_start_chunk(
 118                         afhi->chunks_total + conf->begin_chunk_arg,
 119                         &pard->afhi);
 120         if (conf->end_chunk_given) {
 121                 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 122                 if (PARA_ABS(conf->end_chunk_arg) > afhi->chunks_total)
 123                         goto out_clear_afhi;
 124                 if (conf->end_chunk_arg >= 0)
 125                         pard->last_chunk = conf->end_chunk_arg;
 126                 else
 127                         pard->last_chunk = afhi->chunks_total + conf->end_chunk_arg;
 128         } else
 129                 pard->last_chunk = afhi->chunks_total - 1;
 130         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 131         if (pard->first_chunk >= pard->last_chunk)
 132                 goto out_clear_afhi;
 133         pard->current_chunk = pard->first_chunk;
 134         return pard->audio_format_num;
 135 out_clear_afhi:
 136         clear_afhi(afhi);
 137 out_unmap:
 138         para_munmap(pard->map, pard->map_size);
 139         close(pard->fd);
 140 out:
 141         freep(&rn->private_data);
 142         return ret;
 143 }
 144
 145 static void afh_recv_close(struct receiver_node *rn)
 146 {
 147         struct private_afh_recv_data *pard;
 148
 149         if (!rn || !rn->private_data)
 150                 return;
 151         pard = rn->private_data;
 152         clear_afhi(&pard->afhi);
 153         para_munmap(pard->map, pard->map_size);
 154         close(pard->fd);
 155         freep(&rn->private_data);
 156 }
 157
 158 static void afh_recv_pre_select(struct sched *s, struct task *t)
 159 {
 160         struct receiver_node *rn = container_of(t, struct receiver_node, task);
 161         struct private_afh_recv_data *pard = rn->private_data;
 162         struct afh_info *afhi = &pard->afhi;
 163         struct afh_recv_args_info *conf = rn->conf;
 164         struct timeval chunk_time;
 165         int state = generic_recv_pre_select(s, t);
 166
 167         if (state <= 0)
 168                 return;
 169         if (!conf->just_in_time_given) {
 170                 sched_min_delay(s);
 171                 return;
 172         }
 173         compute_chunk_time(pard->current_chunk - pard->first_chunk,
 174                 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
 175         sched_request_barrier_or_min_delay(&chunk_time, s);
 176 }
 177
 178 static int afh_recv_post_select(__a_unused struct sched *s, struct task *t)
 179 {
 180         struct receiver_node *rn = container_of(t, struct receiver_node, task);
 181         struct afh_recv_args_info *conf = rn->conf;
 182         struct private_afh_recv_data *pard = rn->private_data;
 183         struct btr_node *btrn = rn->btrn;
 184         struct afh_info *afhi = &pard->afhi;
 185         int ret;
 186         char *buf;
 187         const char *start, *end;
 188         size_t size;
 189         struct timeval chunk_time;
 190
 191         ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
 192         if (ret <= 0)
 193                 goto out;
 194         if (pard->first_chunk > 0 && !conf->no_header_given) {
 195                 char *header;
 196                 afh_get_header(afhi, pard->audio_format_num, pard->map,
 197                         pard->map_size, &header, &size);
 198                 if (size > 0) {
 199                         PARA_INFO_LOG("writing header (%zu bytes)\n", size);
 200                         buf = para_malloc(size);
 201                         memcpy(buf, header, size);
 202                         btr_add_output(buf, size, btrn);
 203                         afh_free_header(header, pard->audio_format_num);
 204                 }
 205         }
 206         if (!conf->just_in_time_given) {
 207                 afh_get_chunk(pard->first_chunk, afhi, pard->map, &start, &size);
 208                 afh_get_chunk(pard->last_chunk, afhi, pard->map, &end, &size);
 209                 end += size;
 210                 PARA_INFO_LOG("adding %zu bytes\n", end - start);
 211                 btr_add_output_dont_free(start, end - start, btrn);
 212                 ret = -E_RECV_EOF;
 213                 goto out;
 214         }
 215         if (pard->current_chunk == pard->first_chunk)
 216                 pard->stream_start = *now;
 217         else {
 218                 compute_chunk_time(pard->current_chunk - pard->first_chunk,
 219                         &afhi->chunk_tv, &pard->stream_start, &chunk_time);
 220                 ret = tv_diff(&chunk_time, now, NULL);
 221                 if (ret > 0)
 222                         goto out;
 223         }
 224         afh_get_chunk(pard->current_chunk, afhi, pard->map, &start, &size);
 225         PARA_DEBUG_LOG("adding chunk %u\n", pard->current_chunk);
 226         btr_add_output_dont_free(start, size, btrn);
 227         if (pard->current_chunk >= pard->last_chunk) {
 228                 ret = -E_RECV_EOF;
 229                 goto out;
 230         }
 231         pard->current_chunk++;
 232         ret = 1;
 233 out:
 234         if (ret < 0) {
 235                 btr_remove_node(&rn->btrn);
 236                 pard->current_chunk = pard->first_chunk;
 237         }
 238         return ret;
 239 }
 240
 241 /**
 242  * The init function of the afh receiver.
 243  *
 244  * \param r Pointer to the receiver struct to initialize.
 245  *
 246  * This initializes all function pointers of \a r.
 247  */
 248 void afh_recv_init(struct receiver *r)
 249 {
 250         struct afh_recv_args_info dummy;
 251
 252         afh_init();
 253         afh_recv_cmdline_parser_init(&dummy);
 254         r->open = afh_recv_open;
 255         r->close = afh_recv_close;
 256         r->pre_select = afh_recv_pre_select;
 257         r->post_select = afh_recv_post_select;
 258         r->parse_config = afh_recv_parse_config;
 259         r->free_config = afh_recv_free_config;
 260         r->execute = afh_execute;
 261         r->help = (struct ggo_help)DEFINE_GGO_HELP(afh_recv);
 262         afh_recv_cmdline_parser_free(&dummy);
 263 }