afh.c

   1 /*
   2  * Copyright (C) 2008 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 <dirent.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
  19 static struct afh_args_info conf;
  20 /** The list of all status items */
  21 const char *status_item_list[] = {STATUS_ITEM_ARRAY};
  22
  23 INIT_AFH_ERRLISTS;
  24 INIT_STDERR_LOGGING(conf.loglevel_arg)
  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" /* tag info */
  34                 "%s: %lu: %lu\n" /* chunk time */
  35                 "%s: %lu\n", /* num chunks */
  36                 status_item_list[SI_BITRATE], afhi->bitrate,
  37                 status_item_list[SI_FORMAT], audio_format_name(audio_format_num),
  38                 status_item_list[SI_FREQUENCY], afhi->frequency,
  39                 status_item_list[SI_CHANNELS], afhi->channels,
  40                 status_item_list[SI_SECONDS_TOTAL], afhi->seconds_total,
  41                 afhi->info_string,
  42                 status_item_list[SI_CHUNK_TIME], (long unsigned)afhi->chunk_tv.tv_sec,
  43                         (long unsigned)afhi->chunk_tv.tv_usec,
  44                 status_item_list[SI_NUM_CHUNKS], afhi->chunks_total
  45         );
  46 }
  47
  48 static void print_chunk_table(struct afh_info *afhi)
  49 {
  50         int i;
  51
  52         printf("chunk_table: ");
  53         for (i = 0; i <= afhi->chunks_total; i++)
  54                 printf("%u ", afhi->chunk_table[i]);
  55         printf("\n");
  56 }
  57
  58 static int cat_file(void *audio_file_data, struct afh_info *afhi)
  59 {
  60         int ret;
  61         struct timeval stream_start;
  62         long unsigned i, first_chunk, last_chunk;
  63         const char *buf;
  64         size_t size;
  65
  66
  67         if (conf.begin_chunk_arg < 0) {
  68                 if (-conf.begin_chunk_arg > afhi->chunks_total)
  69                         return -ERRNO_TO_PARA_ERROR(EINVAL);
  70                 first_chunk = afhi->chunks_total + conf.begin_chunk_arg;
  71         } else
  72                 first_chunk = conf.begin_chunk_arg;
  73         if (conf.end_chunk_given) {
  74                 if (conf.end_chunk_arg < 0) {
  75                         if (-conf.end_chunk_arg > afhi->chunks_total)
  76                                 return -ERRNO_TO_PARA_ERROR(EINVAL);
  77                         last_chunk = afhi->chunks_total + conf.end_chunk_arg;
  78                 } else {
  79                         if (conf.end_chunk_arg >= afhi->chunks_total)
  80                                 return -ERRNO_TO_PARA_ERROR(EINVAL);
  81                         last_chunk = conf.end_chunk_arg;
  82                 }
  83         } else
  84                 last_chunk = afhi->chunks_total - 1;
  85         if (first_chunk >= last_chunk)
  86                 return -ERRNO_TO_PARA_ERROR(EINVAL);
  87         if (!afhi->chunks_total)
  88                 return 1;
  89         afh_get_header(afhi, audio_file_data, &buf, &size);
  90         if (size && first_chunk && !conf.no_header_given) {
  91                 PARA_INFO_LOG("writing audio file header (%zu bytes)\n", size);
  92                 ret = write(STDOUT_FILENO, buf, size);
  93                 if (ret < 0)
  94                         return ret;
  95                 if (ret != size)
  96                         return -E_AFH_SHORT_WRITE;
  97         }
  98         PARA_NOTICE_LOG("writing chunks %lu - %lu\n", first_chunk, last_chunk);
  99         gettimeofday(&stream_start, NULL);
 100         for (i = first_chunk; i <= last_chunk; i++) {
 101                 struct timeval now, diff, next_chunk;
 102                 afh_get_chunk(i, afhi, audio_file_data, &buf, &size);
 103                 PARA_DEBUG_LOG("chunk %lu: size %zu\n", i, size);
 104                 if (conf.just_in_time_given) {
 105                         compute_chunk_time(i - first_chunk, &afhi->chunk_tv,
 106                                 &stream_start, &next_chunk);
 107                         gettimeofday(&now, NULL);
 108                         ret = tv_diff(&next_chunk, &now, &diff);
 109                         if (ret > 0) {
 110                                 ret = para_select(1, NULL, NULL, &diff);
 111                                 if (ret < 0)
 112                                         return ret;
 113                         }
 114                 }
 115                 if (!size)
 116                         continue;
 117                 PARA_INFO_LOG("writing chunk %lu\n", i);
 118                 ret = write_all(STDOUT_FILENO, buf, &size);
 119                 if (ret < 0)
 120                         return ret;
 121         }
 122         return 1;
 123 }
 124
 125 /**
 126  * The main function of para_afh.
 127  *
 128  * \param argc Usual argument count.
 129  * \param argv Usual argument vector.
 130  *
 131  * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
 132  */
 133 int main(int argc, char **argv)
 134 {
 135         int ret, audio_format_num, fd;
 136         void *audio_file_data;
 137         size_t audio_file_size;
 138         struct afh_info afhi;
 139
 140         afh_cmdline_parser(argc, argv, &conf);
 141         HANDLE_VERSION_FLAG("afh", conf);
 142         ret = -E_AFH_SYNTAX;
 143         if (conf.inputs_num != 1)
 144                 goto out;
 145         afh_init();
 146         ret = mmap_full_file(conf.inputs[0], O_RDONLY, &audio_file_data,
 147                 &audio_file_size, &fd);
 148         if (ret < 0)
 149                 goto out;
 150         ret = compute_afhi(conf.inputs[0], audio_file_data, audio_file_size,
 151                 fd, &afhi);
 152         if (ret < 0)
 153                 goto out;
 154         audio_format_num = ret;
 155         if (conf.stream_given)
 156                 ret = cat_file(audio_file_data, &afhi);
 157         else {
 158                 print_info(audio_format_num, &afhi);
 159                 if (conf.chunk_table_given)
 160                         print_chunk_table(&afhi);
 161                 ret = 1;
 162         }
 163 out:
 164         if (ret < 0)
 165                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 166         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 167 }