hvirtual/plugins/reverseaudio/reverseaudio.C

   1 #include "mainprogress.h"
   2 #include "reverseaudio.h"
   3
   4 #include <stdio.h>
   5 #include <string.h>
   6
   7 #include <libintl.h>
   8 #define _(String) gettext(String)
   9 #define gettext_noop(String) String
  10 #define N_(String) gettext_noop (String)
  11
  12
  13 PluginClient* new_plugin(PluginServer *server)
  14 {
  15         return new ReverseAudio(server);
  16 }
  17
  18 ReverseAudio::ReverseAudio(PluginServer *server)
  19  : PluginAClient(server)
  20 {
  21 }
  22
  23 ReverseAudio::~ReverseAudio()
  24 {
  25 }
  26
  27 char* ReverseAudio::plugin_title() { return _("Reverse audio"); }
  28
  29 int ReverseAudio::is_realtime() { return 0; }
  30
  31 VFrame* ReverseAudio::new_picon()
  32 {
  33         return 0;
  34 }
  35
  36 int ReverseAudio::start_loop()
  37 {
  38 //printf("ReverseAudio::start_loop 1\n");
  39         if(PluginClient::interactive)
  40         {
  41                 char string[BCTEXTLEN];
  42                 sprintf(string, "%s...", plugin_title());
  43                 progress = start_progress(string,
  44                         (PluginClient::end - PluginClient::start));
  45         }
  46
  47         current_position = PluginClient::end;
  48         total_written = 0;
  49 //printf("ReverseAudio::start_loop 2\n");
  50         return 0;
  51 }
  52
  53
  54 int ReverseAudio::stop_loop()
  55 {
  56         if(PluginClient::interactive)
  57         {
  58                 progress->stop_progress();
  59                 delete progress;
  60         }
  61         return 0;
  62 }
  63
  64 int ReverseAudio::process_loop(double *buffer, int64_t &write_length)
  65 {
  66         int result = 0;
  67         int64_t fragment_len;
  68 //printf("ReverseAudio::process_loop 1\n");
  69
  70         fragment_len = PluginClient::in_buffer_size;
  71 //printf("ReverseAudio::process_loop 2\n");
  72         if(current_position - fragment_len < PluginClient::start)
  73         {
  74                 fragment_len = current_position - PluginClient::start;
  75                 result = 1;
  76         }
  77 //printf("ReverseAudio::process_loop 3 %d %d\n", current_position, fragment_len);
  78
  79         read_samples(buffer, current_position - fragment_len, fragment_len);
  80
  81 //printf("ReverseAudio::process_loop 4 %p\n", buffer);
  82         for(int j = 0; j < fragment_len / 2; j++)
  83         {
  84                 double sample = buffer[j];
  85                 buffer[j] = buffer[fragment_len - 1 - j];
  86                 buffer[fragment_len - 1 -j] = sample;
  87         }
  88 //printf("ReverseAudio::process_loop 5 %d\n", current_position);
  89
  90         current_position -= fragment_len;
  91 //printf("ReverseAudio::process_loop 6 %d\n", current_position);
  92         total_written += fragment_len;
  93         write_length = fragment_len;
  94         if(PluginClient::interactive) result = progress->update(total_written);
  95 //printf("ReverseAudio::process_loop 7 %d\n", current_position);
  96
  97         return result;
  98 }