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 }