afh_recv.c

   1 /* Copyright (C) 2011 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
   2
   3 /** \file afh_recv.c Receiver for streaming local files. */
   4
   5 #include <regex.h>
   6 #include <sys/types.h>
   7 #include <lopsub.h>
   8
   9 #include "recv_cmd.lsg.h"
  10 #include "para.h"
  11 #include "error.h"
  12 #include "list.h"
  13 #include "sched.h"
  14 #include "buffer_tree.h"
  15 #include "recv.h"
  16 #include "string.h"
  17 #include "fd.h"
  18 #include "afh.h"
  19
  20 struct private_afh_recv_data {
  21         int fd;
  22         void *map;
  23         size_t map_size;
  24         struct afh_info afhi;
  25         int audio_format_num;
  26         long unsigned first_chunk;
  27         long unsigned last_chunk;
  28         struct timeval stream_start;
  29         uint32_t current_chunk;
  30         void *afh_context;
  31 };
  32
  33 static int afh_execute(struct btr_node *btrn, const char *cmd, char **result)
  34 {
  35         struct receiver_node *rn = btr_context(btrn);
  36         struct private_afh_recv_data *pard = rn->private_data;
  37
  38         *result = NULL;
  39         if (!strcmp(cmd, "seconds_total")) {
  40                 *result = make_message("%" PRIu32, pard->afhi.seconds_total);
  41                 return 1;
  42         }
  43         if (!strcmp(cmd, "chunks_total")) {
  44                 *result = make_message("%" PRIu32, pard->afhi.chunks_total);
  45                 return 1;
  46         }
  47         if (!strcmp(cmd, "afhi")) {
  48                 afh_get_afhi_txt(pard->audio_format_num, &pard->afhi, result);
  49                 return 1;
  50         }
  51         if (!strncmp(cmd, "repos", 5)) {
  52                 int32_t x;
  53                 int ret = para_atoi32(cmd + 5, &x);
  54                 if (ret < 0)
  55                         return ret;
  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;
  61                 return 1;
  62         }
  63         return -E_BTR_NAVAIL;
  64 }
  65
  66 static int afh_recv_open(struct receiver_node *rn)
  67 {
  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);
  74         int ret;
  75
  76         if (!fn || *fn == '\0')
  77                 return -E_AFH_RECV_BAD_FILENAME;
  78         rn->private_data = pard = para_calloc(sizeof(*pard));
  79         afhi = &pard->afhi;
  80         ret = mmap_full_file(fn, O_RDONLY, &pard->map,
  81                 &pard->map_size, &pard->fd);
  82         if (ret < 0)
  83                 goto out;
  84         ret = compute_afhi(fn, pard->map, pard->map_size,
  85                 pard->fd, afhi);
  86         if (ret < 0)
  87                 goto out_unmap;
  88         pard->audio_format_num = ret;
  89         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
  90         if (afhi->chunks_total == 0)
  91                 goto out_clear_afhi;
  92         if (PARA_ABS(bc) >= afhi->chunks_total)
  93                 goto out_clear_afhi;
  94         if (bc >= 0)
  95                 pard->first_chunk = afh_get_start_chunk(bc, &pard->afhi,
  96                         pard->audio_format_num);
  97         else
  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)
 104                         goto out_clear_afhi;
 105                 if (ec >= 0)
 106                         pard->last_chunk = ec;
 107                 else
 108                         pard->last_chunk = afhi->chunks_total + ec;
 109         } else
 110                 pard->last_chunk = afhi->chunks_total - 1;
 111         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 112         if (pard->first_chunk >= pard->last_chunk)
 113                 goto out_clear_afhi;
 114         pard->current_chunk = pard->first_chunk;
 115         return pard->audio_format_num;
 116 out_clear_afhi:
 117         clear_afhi(afhi);
 118 out_unmap:
 119         para_munmap(pard->map, pard->map_size);
 120         close(pard->fd);
 121 out:
 122         freep(&rn->private_data);
 123         return ret;
 124 }
 125
 126 static void afh_recv_close(struct receiver_node *rn)
 127 {
 128         struct private_afh_recv_data *pard;
 129
 130         if (!rn || !rn->private_data)
 131                 return;
 132         pard = rn->private_data;
 133         clear_afhi(&pard->afhi);
 134         para_munmap(pard->map, pard->map_size);
 135         close(pard->fd);
 136         afh_close(pard->afh_context, pard->audio_format_num);
 137         freep(&rn->private_data);
 138 }
 139
 140 static void afh_recv_pre_select(struct sched *s, void *context)
 141 {
 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);
 149
 150         if (state <= 0)
 151                 return;
 152         if (!j_given) {
 153                 sched_min_delay(s);
 154                 return;
 155         }
 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);
 159 }
 160
 161 static int afh_recv_post_select(__a_unused struct sched *s, void *context)
 162 {
 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;
 168         int ret;
 169         char *buf;
 170         const char *start;
 171         size_t size;
 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);
 175
 176         ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
 177         if (ret <= 0)
 178                 goto out;
 179         if (pard->first_chunk > 0 && !H_given) {
 180                 char *header;
 181                 afh_get_header(afhi, pard->audio_format_num, pard->map,
 182                         pard->map_size, &header, &size);
 183                 if (size > 0) {
 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);
 189                 }
 190         }
 191         if (!j_given) {
 192                 long unsigned n;
 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,
 196                                 &pard->afh_context);
 197                         if (ret < 0)
 198                                 goto out;
 199                         PARA_DEBUG_LOG("adding %zu bytes\n", size);
 200                         btr_add_output_dont_free(start, size, btrn);
 201                 }
 202                 ret = -E_RECV_EOF;
 203                 goto out;
 204         }
 205         if (pard->current_chunk == pard->first_chunk)
 206                 pard->stream_start = *now;
 207         else {
 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);
 211                 if (ret > 0)
 212                         goto out;
 213         }
 214         ret = afh_get_chunk(pard->current_chunk, afhi,
 215                 pard->audio_format_num, pard->map,
 216                 pard->map_size, &start, &size,
 217                 &pard->afh_context);
 218         if (ret < 0)
 219                 goto out;
 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 /** See \ref recv_init(). */
 237 const struct receiver lsg_recv_cmd_com_afh_user_data = {
 238         .init = afh_init,
 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,
 244 };