afh_recv.c

   1 /*
   2  * Copyright (C) 2011-2013 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                 rn->task.error = 0;
  64                 return 1;
  65         }
  66         return -E_BTR_NAVAIL;
  67 }
  68
  69 static void *afh_recv_parse_config(int argc, char **argv)
  70 {
  71         struct afh_recv_args_info *tmp = para_calloc(sizeof(*tmp));
  72
  73         afh_recv_cmdline_parser(argc, argv, tmp);
  74         return tmp;
  75 }
  76
  77 static void afh_recv_free_config(void *conf)
  78 {
  79         if (!conf)
  80                 return;
  81         afh_recv_cmdline_parser_free(conf);
  82         free(conf);
  83 }
  84
  85 static int afh_recv_open(struct receiver_node *rn)
  86 {
  87         struct afh_recv_args_info *conf = rn->conf;
  88         struct private_afh_recv_data *pard;
  89         struct afh_info *afhi;
  90         char *filename = conf->filename_arg;
  91
  92         int ret;
  93
  94         if (!filename || *filename == '\0')
  95                 return -E_AFH_RECV_BAD_FILENAME;
  96         rn->private_data = pard = para_calloc(sizeof(*pard));
  97         afhi = &pard->afhi;
  98         ret = mmap_full_file(filename, O_RDONLY, &pard->map,
  99                 &pard->map_size, &pard->fd);
 100         if (ret < 0)
 101                 goto out;
 102         ret = compute_afhi(filename, pard->map, pard->map_size,
 103                 pard->fd, afhi);
 104         if (ret < 0)
 105                 goto out_unmap;
 106         pard->audio_format_num = ret;
 107         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 108         if (afhi->chunks_total == 0)
 109                 goto out_clear_afhi;
 110         if (PARA_ABS(conf->begin_chunk_arg) >= afhi->chunks_total)
 111                 goto out_clear_afhi;
 112         if (conf->begin_chunk_arg >= 0)
 113                 pard->first_chunk = conf->begin_chunk_arg;
 114         else
 115                 pard->first_chunk = afhi->chunks_total + conf->begin_chunk_arg;
 116         if (conf->end_chunk_given) {
 117                 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 118                 if (PARA_ABS(conf->end_chunk_arg) > afhi->chunks_total)
 119                         goto out_clear_afhi;
 120                 if (conf->end_chunk_arg >= 0)
 121                         pard->last_chunk = conf->end_chunk_arg;
 122                 else
 123                         pard->last_chunk = afhi->chunks_total + conf->end_chunk_arg;
 124         } else
 125                 pard->last_chunk = afhi->chunks_total - 1;
 126         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 127         if (pard->first_chunk >= pard->last_chunk)
 128                 goto out_clear_afhi;
 129         pard->current_chunk = pard->first_chunk;
 130         return pard->audio_format_num;
 131 out_clear_afhi:
 132         clear_afhi(afhi);
 133 out_unmap:
 134         para_munmap(pard->map, pard->map_size);
 135         close(pard->fd);
 136 out:
 137         freep(&rn->private_data);
 138         return ret;
 139 }
 140
 141 static void afh_recv_close(struct receiver_node *rn)
 142 {
 143         struct private_afh_recv_data *pard;
 144
 145         if (!rn || !rn->private_data)
 146                 return;
 147         pard = rn->private_data;
 148         clear_afhi(&pard->afhi);
 149         para_munmap(pard->map, pard->map_size);
 150         close(pard->fd);
 151         freep(&rn->private_data);
 152 }
 153
 154 static void afh_recv_pre_select(struct sched *s, struct task *t)
 155 {
 156         struct receiver_node *rn = container_of(t, struct receiver_node, task);
 157         struct private_afh_recv_data *pard = rn->private_data;
 158         struct afh_info *afhi = &pard->afhi;
 159         struct afh_recv_args_info *conf = rn->conf;
 160         struct timeval chunk_time;
 161         int state = generic_recv_pre_select(s, t);
 162
 163         if (state <= 0)
 164                 return;
 165         if (!conf->just_in_time_given) {
 166                 sched_min_delay(s);
 167                 return;
 168         }
 169         compute_chunk_time(pard->current_chunk - pard->first_chunk,
 170                 &afhi->chunk_tv, &pard->stream_start, &chunk_time);
 171         sched_request_barrier_or_min_delay(&chunk_time, s);
 172 }
 173
 174 static int afh_recv_post_select(__a_unused struct sched *s, struct task *t)
 175 {
 176         struct receiver_node *rn = container_of(t, struct receiver_node, task);
 177         struct afh_recv_args_info *conf = rn->conf;
 178         struct private_afh_recv_data *pard = rn->private_data;
 179         struct btr_node *btrn = rn->btrn;
 180         struct afh_info *afhi = &pard->afhi;
 181         int ret;
 182         char *buf;
 183         const char *start, *end;
 184         size_t size;
 185         struct timeval chunk_time;
 186
 187         ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
 188         if (ret <= 0)
 189                 goto out;
 190         if (pard->first_chunk > 0 && !conf->no_header_given) {
 191                 char *header;
 192                 afh_get_header(afhi, pard->audio_format_num, pard->map,
 193                         pard->map_size, &header, &size);
 194                 if (size > 0) {
 195                         PARA_INFO_LOG("writing header (%zu bytes)\n", size);
 196                         buf = para_malloc(size);
 197                         memcpy(buf, header, size);
 198                         btr_add_output(buf, size, btrn);
 199                         afh_free_header(header, pard->audio_format_num);
 200                 }
 201         }
 202         if (!conf->just_in_time_given) {
 203                 afh_get_chunk(pard->first_chunk, afhi, pard->map, &start, &size);
 204                 afh_get_chunk(pard->last_chunk, afhi, pard->map, &end, &size);
 205                 end += size;
 206                 PARA_INFO_LOG("adding %zu bytes\n", end - start);
 207                 btr_add_output_dont_free(start, end - start, btrn);
 208                 ret = -E_RECV_EOF;
 209                 goto out;
 210         }
 211         if (pard->current_chunk == pard->first_chunk)
 212                 pard->stream_start = *now;
 213         else {
 214                 compute_chunk_time(pard->current_chunk - pard->first_chunk,
 215                         &afhi->chunk_tv, &pard->stream_start, &chunk_time);
 216                 ret = tv_diff(&chunk_time, now, NULL);
 217                 if (ret > 0)
 218                         goto out;
 219         }
 220         afh_get_chunk(pard->current_chunk, afhi, pard->map, &start, &size);
 221         PARA_DEBUG_LOG("adding chunk %u\n", pard->current_chunk);
 222         btr_add_output_dont_free(start, size, btrn);
 223         if (pard->current_chunk >= pard->last_chunk) {
 224                 ret = -E_RECV_EOF;
 225                 goto out;
 226         }
 227         pard->current_chunk++;
 228         ret = 1;
 229 out:
 230         if (ret < 0) {
 231                 btr_remove_node(&rn->btrn);
 232                 pard->current_chunk = pard->first_chunk;
 233         }
 234         return ret;
 235 }
 236
 237 /**
 238  * The init function of the afh receiver.
 239  *
 240  * \param r Pointer to the receiver struct to initialize.
 241  *
 242  * This initializes all function pointers of \a r.
 243  */
 244 void afh_recv_init(struct receiver *r)
 245 {
 246         struct afh_recv_args_info dummy;
 247
 248         afh_init();
 249         afh_recv_cmdline_parser_init(&dummy);
 250         r->open = afh_recv_open;
 251         r->close = afh_recv_close;
 252         r->pre_select = afh_recv_pre_select;
 253         r->post_select = afh_recv_post_select;
 254         r->parse_config = afh_recv_parse_config;
 255         r->free_config = afh_recv_free_config;
 256         r->execute = afh_execute;
 257         r->help = (struct ggo_help)DEFINE_GGO_HELP(afh_recv);
 258         afh_recv_cmdline_parser_free(&dummy);
 259 }