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         printf("%s: %dkbit/s\n" /* bitrate */
  29                 "%s: %s\n" /* format */
  30                 "%s: %dHz\n" /* frequency */
  31                 "%s: %d\n" /* channels */
  32                 "%s: %lu\n" /* seconds total */
  33                 "%s: %lu: %lu\n" /* chunk time */
  34                 "%s: %lu\n" /* num chunks */
  35                 "%s: %s\n" /* techinfo */
  36                 "%s: %s\n" /* artist */
  37                 "%s: %s\n" /* title */
  38                 "%s: %s\n" /* year */
  39                 "%s: %s\n" /* album */
  40                 "%s: %s\n", /* comment */
  41                 status_item_list[SI_BITRATE], afhi->bitrate,
  42                 status_item_list[SI_FORMAT], audio_format_name(audio_format_num),
  43                 status_item_list[SI_FREQUENCY], afhi->frequency,
  44                 status_item_list[SI_CHANNELS], afhi->channels,
  45                 status_item_list[SI_SECONDS_TOTAL], afhi->seconds_total,
  46                 status_item_list[SI_CHUNK_TIME], (long unsigned)afhi->chunk_tv.tv_sec,
  47                         (long unsigned)afhi->chunk_tv.tv_usec,
  48                 status_item_list[SI_NUM_CHUNKS], afhi->chunks_total,
  49                 status_item_list[SI_TECHINFO], afhi->techinfo? afhi->techinfo : "",
  50                 status_item_list[SI_ARTIST], afhi->tags.artist? afhi->tags.artist : "",
  51                 status_item_list[SI_TITLE], afhi->tags.title? afhi->tags.title : "",
  52                 status_item_list[SI_YEAR], afhi->tags.year? afhi->tags.year : "",
  53                 status_item_list[SI_ALBUM], afhi->tags.album? afhi->tags.album : "",
  54                 status_item_list[SI_COMMENT], afhi->tags.comment? afhi->tags.comment : ""
  55         );
  56 }
  57
  58 static void print_chunk_table(struct afh_info *afhi)
  59 {
  60         int i;
  61
  62         if (!conf.human_given) {
  63                 printf("chunk_table: ");
  64                 for (i = 0; i <= afhi->chunks_total; i++)
  65                         printf("%u ", afhi->chunk_table[i]);
  66                 printf("\n");
  67                 return;
  68         }
  69         for (i = 1; i <= afhi->chunks_total; i++) {
  70                 struct timeval tv;
  71                 long unsigned from, to;
  72                 tv_scale(i - 1, &afhi->chunk_tv, &tv);
  73                 from = tv2ms(&tv);
  74                 tv_scale(i, &afhi->chunk_tv, &tv);
  75                 to = tv2ms(&tv);
  76                 printf("%d [%lu.%03lu - %lu.%03lu] %u - %u (%u)\n", i - 1,
  77                         from / 1000, from % 1000, to / 1000, to % 1000,
  78                         afhi->chunk_table[i - 1], afhi->chunk_table[i],
  79                         afhi->chunk_table[i] - afhi->chunk_table[i - 1]);
  80         }
  81 }
  82
  83 static int cat_file(struct afh_info *afhi, int audio_format_id,
  84                 void *audio_file_data, size_t audio_file_size)
  85 {
  86         int ret;
  87         struct timeval stream_start;
  88         long unsigned i, first_chunk, last_chunk;
  89         const char *buf;
  90         char *header;
  91         size_t size;
  92
  93         if (conf.begin_chunk_arg < 0) {
  94                 if (-conf.begin_chunk_arg > afhi->chunks_total)
  95                         return -ERRNO_TO_PARA_ERROR(EINVAL);
  96                 first_chunk = afhi->chunks_total + conf.begin_chunk_arg;
  97         } else
  98                 first_chunk = conf.begin_chunk_arg;
  99         if (conf.end_chunk_given) {
 100                 if (conf.end_chunk_arg < 0) {
 101                         if (-conf.end_chunk_arg > afhi->chunks_total)
 102                                 return -ERRNO_TO_PARA_ERROR(EINVAL);
 103                         last_chunk = afhi->chunks_total + conf.end_chunk_arg;
 104                 } else {
 105                         if (conf.end_chunk_arg >= afhi->chunks_total)
 106                                 return -ERRNO_TO_PARA_ERROR(EINVAL);
 107                         last_chunk = conf.end_chunk_arg;
 108                 }
 109         } else
 110                 last_chunk = afhi->chunks_total - 1;
 111         if (first_chunk >= last_chunk)
 112                 return -ERRNO_TO_PARA_ERROR(EINVAL);
 113         if (!afhi->chunks_total)
 114                 return 1;
 115         /* eliminate the possibility of short writes */
 116         ret = mark_fd_blocking(STDOUT_FILENO);
 117         if (ret < 0)
 118                 return ret;
 119         if (first_chunk > 0 && !conf.no_header_given) {
 120                 afh_get_header(afhi, audio_format_id, audio_file_data, audio_file_size,
 121                         &header, &size);
 122                 if (size > 0) {
 123                         PARA_INFO_LOG("writing header (%zu bytes)\n", size);
 124                         ret = write_all(STDOUT_FILENO, header, size);
 125                         afh_free_header(header, audio_format_id);
 126                         if (ret < 0)
 127                                 return ret;
 128                         if (ret != size)
 129                                 return -E_AFH_SHORT_WRITE;
 130                 }
 131         }
 132         PARA_NOTICE_LOG("writing chunks %lu - %lu\n", first_chunk, last_chunk);
 133         gettimeofday(&stream_start, NULL);
 134         for (i = first_chunk; i <= last_chunk; i++) {
 135                 struct timeval now, diff, next_chunk;
 136                 afh_get_chunk(i, afhi, audio_file_data, &buf, &size);
 137                 PARA_DEBUG_LOG("chunk %lu: size %zu\n", i, size);
 138                 if (conf.just_in_time_given) {
 139                         compute_chunk_time(i - first_chunk, &afhi->chunk_tv,
 140                                 &stream_start, &next_chunk);
 141                         gettimeofday(&now, NULL);
 142                         ret = tv_diff(&next_chunk, &now, &diff);
 143                         if (ret > 0) {
 144                                 ret = para_select(1, NULL, NULL, &diff);
 145                                 if (ret < 0)
 146                                         return ret;
 147                         }
 148                 }
 149                 if (!size)
 150                         continue;
 151                 PARA_INFO_LOG("writing chunk %lu\n", i);
 152                 ret = write_all(STDOUT_FILENO, buf, size);
 153                 if (ret < 0)
 154                         return ret;
 155         }
 156         return 1;
 157 }
 158
 159 /**
 160  * The main function of para_afh.
 161  *
 162  * \param argc Usual argument count.
 163  * \param argv Usual argument vector.
 164  *
 165  * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
 166  */
 167 int main(int argc, char **argv)
 168 {
 169         int i, ret, audio_format_num, fd;
 170         void *audio_file_data;
 171         size_t audio_file_size;
 172         struct afh_info afhi;
 173
 174         afh_cmdline_parser(argc, argv, &conf);
 175         HANDLE_VERSION_FLAG("afh", conf);
 176         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 177         ret = -E_AFH_SYNTAX;
 178         if (conf.inputs_num == 0)
 179                 goto out;
 180         if (conf.stream_given && conf.inputs_num != 1)
 181                 goto out;
 182         afh_init();
 183         for (i = 0; i < conf.inputs_num; i++) {
 184                 int ret2;
 185                 ret = mmap_full_file(conf.inputs[i], O_RDONLY, &audio_file_data,
 186                         &audio_file_size, &fd);
 187                 if (ret < 0) {
 188                         PARA_ERROR_LOG("failed to mmap \"%s\"\n", conf.inputs[i]);
 189                         goto out;
 190                 }
 191                 ret = compute_afhi(conf.inputs[i], audio_file_data, audio_file_size,
 192                         fd, &afhi);
 193                 if (ret < 0)
 194                         goto out;
 195
 196                 audio_format_num = ret;
 197                 if (conf.stream_given)
 198                         ret = cat_file(&afhi, audio_format_num,
 199                                 audio_file_data, audio_file_size);
 200                 else {
 201                         printf("File %d: %s\n", i + 1, conf.inputs[i]);
 202                         print_info(audio_format_num, &afhi);
 203                         if (conf.chunk_table_given)
 204                                 print_chunk_table(&afhi);
 205                         printf("\n");
 206                 }
 207                 clear_afhi(&afhi);
 208                 ret2 = para_munmap(audio_file_data, audio_file_size);
 209                 if (ret2 < 0 && ret >= 0)
 210                         ret = ret2;
 211                 if (ret < 0)
 212                         break;
 213         }
 214 out:
 215         if (ret < 0)
 216                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 217         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 218 }