afh.c

   1 /*
   2  * Copyright (C) 2008-2012 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file afh.c Paraslash's standalone audio format handler tool. */
   8
   9 #include <regex.h>
  10 #include <sys/time.h>
  11
  12 #include "para.h"
  13 #include "string.h"
  14 #include "afh.cmdline.h"
  15 #include "fd.h"
  16 #include "afh.h"
  17 #include "error.h"
  18 #include "version.h"
  19
  20 static struct afh_args_info conf;
  21 INIT_AFH_ERRLISTS;
  22
  23 static int loglevel;
  24 INIT_STDERR_LOGGING(loglevel)
  25
  26 static void print_info(int audio_format_num, struct afh_info *afhi)
  27 {
  28         char *msg;
  29
  30         afh_get_afhi_txt(audio_format_num, afhi, &msg);
  31         printf("%s", msg);
  32         free(msg);
  33 }
  34
  35 static void print_chunk_table(struct afh_info *afhi)
  36 {
  37         int i;
  38
  39         if (!conf.human_given) {
  40                 printf("chunk_table: ");
  41                 for (i = 0; i <= afhi->chunks_total; i++)
  42                         printf("%u ", afhi->chunk_table[i]);
  43                 printf("\n");
  44                 return;
  45         }
  46         for (i = 1; i <= afhi->chunks_total; i++) {
  47                 struct timeval tv;
  48                 long unsigned from, to;
  49                 tv_scale(i - 1, &afhi->chunk_tv, &tv);
  50                 from = tv2ms(&tv);
  51                 tv_scale(i, &afhi->chunk_tv, &tv);
  52                 to = tv2ms(&tv);
  53                 printf("%d [%lu.%03lu - %lu.%03lu] %u - %u (%u)\n", i - 1,
  54                         from / 1000, from % 1000, to / 1000, to % 1000,
  55                         afhi->chunk_table[i - 1], afhi->chunk_table[i],
  56                         afhi->chunk_table[i] - afhi->chunk_table[i - 1]);
  57         }
  58 }
  59
  60 static int cat_file(struct afh_info *afhi, int audio_format_id,
  61                 void *audio_file_data, size_t audio_file_size)
  62 {
  63         int ret;
  64         struct timeval stream_start;
  65         long unsigned i, first_chunk, last_chunk;
  66         const char *buf;
  67         char *header;
  68         size_t size;
  69
  70         if (conf.begin_chunk_arg < 0) {
  71                 if (-conf.begin_chunk_arg > afhi->chunks_total)
  72                         return -ERRNO_TO_PARA_ERROR(EINVAL);
  73                 first_chunk = afhi->chunks_total + conf.begin_chunk_arg;
  74         } else
  75                 first_chunk = conf.begin_chunk_arg;
  76         if (conf.end_chunk_given) {
  77                 if (conf.end_chunk_arg < 0) {
  78                         if (-conf.end_chunk_arg > afhi->chunks_total)
  79                                 return -ERRNO_TO_PARA_ERROR(EINVAL);
  80                         last_chunk = afhi->chunks_total + conf.end_chunk_arg;
  81                 } else {
  82                         if (conf.end_chunk_arg >= afhi->chunks_total)
  83                                 return -ERRNO_TO_PARA_ERROR(EINVAL);
  84                         last_chunk = conf.end_chunk_arg;
  85                 }
  86         } else
  87                 last_chunk = afhi->chunks_total - 1;
  88         if (first_chunk >= last_chunk)
  89                 return -ERRNO_TO_PARA_ERROR(EINVAL);
  90         if (!afhi->chunks_total)
  91                 return 1;
  92         /* eliminate the possibility of short writes */
  93         ret = mark_fd_blocking(STDOUT_FILENO);
  94         if (ret < 0)
  95                 return ret;
  96         if (first_chunk > 0 && !conf.no_header_given) {
  97                 afh_get_header(afhi, audio_format_id, audio_file_data, audio_file_size,
  98                         &header, &size);
  99                 if (size > 0) {
 100                         PARA_INFO_LOG("writing header (%zu bytes)\n", size);
 101                         ret = write_all(STDOUT_FILENO, header, size);
 102                         afh_free_header(header, audio_format_id);
 103                         if (ret < 0)
 104                                 return ret;
 105                         if (ret != size)
 106                                 return -E_AFH_SHORT_WRITE;
 107                 }
 108         }
 109         PARA_NOTICE_LOG("writing chunks %lu - %lu\n", first_chunk, last_chunk);
 110         gettimeofday(&stream_start, NULL);
 111         for (i = first_chunk; i <= last_chunk; i++) {
 112                 struct timeval now, diff, next_chunk;
 113                 afh_get_chunk(i, afhi, audio_file_data, &buf, &size);
 114                 PARA_DEBUG_LOG("chunk %lu: size %zu\n", i, size);
 115                 if (conf.just_in_time_given) {
 116                         compute_chunk_time(i - first_chunk, &afhi->chunk_tv,
 117                                 &stream_start, &next_chunk);
 118                         gettimeofday(&now, NULL);
 119                         ret = tv_diff(&next_chunk, &now, &diff);
 120                         if (ret > 0) {
 121                                 ret = para_select(1, NULL, NULL, &diff);
 122                                 if (ret < 0)
 123                                         return ret;
 124                         }
 125                 }
 126                 if (!size)
 127                         continue;
 128                 PARA_INFO_LOG("writing chunk %lu\n", i);
 129                 ret = write_all(STDOUT_FILENO, buf, size);
 130                 if (ret < 0)
 131                         return ret;
 132         }
 133         return 1;
 134 }
 135
 136 /**
 137  * The main function of para_afh.
 138  *
 139  * \param argc Usual argument count.
 140  * \param argv Usual argument vector.
 141  *
 142  * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
 143  */
 144 int main(int argc, char **argv)
 145 {
 146         int i, ret, audio_format_num, fd;
 147         void *audio_file_data;
 148         size_t audio_file_size;
 149         struct afh_info afhi;
 150
 151         afh_cmdline_parser(argc, argv, &conf);
 152         HANDLE_VERSION_FLAG("afh", conf);
 153         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 154         ret = -E_AFH_SYNTAX;
 155         if (conf.inputs_num == 0)
 156                 goto out;
 157         if (conf.stream_given && conf.inputs_num != 1)
 158                 goto out;
 159         afh_init();
 160         for (i = 0; i < conf.inputs_num; i++) {
 161                 int ret2;
 162                 ret = mmap_full_file(conf.inputs[i], O_RDONLY, &audio_file_data,
 163                         &audio_file_size, &fd);
 164                 if (ret < 0) {
 165                         PARA_ERROR_LOG("failed to mmap \"%s\"\n", conf.inputs[i]);
 166                         goto out;
 167                 }
 168                 ret = compute_afhi(conf.inputs[i], audio_file_data, audio_file_size,
 169                         fd, &afhi);
 170                 if (ret < 0)
 171                         goto out;
 172
 173                 audio_format_num = ret;
 174                 if (conf.stream_given)
 175                         ret = cat_file(&afhi, audio_format_num,
 176                                 audio_file_data, audio_file_size);
 177                 else {
 178                         printf("File %d: %s\n", i + 1, conf.inputs[i]);
 179                         print_info(audio_format_num, &afhi);
 180                         if (conf.chunk_table_given)
 181                                 print_chunk_table(&afhi);
 182                         printf("\n");
 183                 }
 184                 clear_afhi(&afhi);
 185                 ret2 = para_munmap(audio_file_data, audio_file_size);
 186                 if (ret2 < 0 && ret >= 0)
 187                         ret = ret2;
 188                 if (ret < 0)
 189                         break;
 190         }
 191 out:
 192         if (ret < 0)
 193                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 194         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 195 }