cinelerra/fileac3.C

   1 #include "asset.h"
   2 #include "clip.h"
   3 #include "fileac3.h"
   4 #include "language.h"
   5 #include "mwindow.inc"
   6 #include "mainerror.h"
   7
   8
   9
  10 #include <string.h>
  11
  12 FileAC3::FileAC3(Asset_GC asset, File *file)
  13  : FileBase(asset, file)
  14 {
  15         reset_parameters();
  16 }
  17
  18 FileAC3::~FileAC3()
  19 {
  20         close_file();
  21 }
  22
  23 int FileAC3::reset_parameters_derived()
  24 {
  25         codec = 0;
  26         codec_context = 0;
  27         fd = 0;
  28         temp_raw = 0;
  29         temp_raw_size = 0;
  30         temp_raw_allocated = 0;
  31         temp_compressed = 0;
  32         compressed_allocated = 0;
  33 }
  34
  35 void FileAC3::get_parameters(BC_WindowBase *parent_window,
  36                 Asset_GC asset,
  37                 BC_WindowBase* &format_window,
  38                 int audio_options,
  39                 int video_options)
  40 {
  41         if(audio_options)
  42         {
  43
  44                 AC3ConfigAudio *window = new AC3ConfigAudio(parent_window, asset);
  45                 format_window = window;
  46                 window->create_objects();
  47                 window->run_window();
  48                 delete window;
  49         }
  50 }
  51
  52 int FileAC3::check_sig()
  53 {
  54 // Libmpeg3 does this in FileMPEG.
  55         return 0;
  56 }
  57
  58 int FileAC3::open_file(int rd, int wr)
  59 {
  60         this->wr = wr;
  61         this->rd = rd;
  62
  63
  64         if(wr)
  65         {
  66                 avcodec_init();
  67                 avcodec_register_all();
  68                 codec = avcodec_find_encoder(CODEC_ID_AC3);
  69                 if(!codec)
  70                 {
  71                         eprintf("codec not found.\n");
  72                         return 1;
  73                 }
  74                 codec_context = avcodec_alloc_context();
  75                 codec_context->bit_rate = asset->ac3_bitrate * 1000;
  76                 codec_context->sample_rate = asset->sample_rate;
  77                 codec_context->channels = asset->channels;
  78                 if(avcodec_open(codec_context, codec))
  79                 {
  80                         eprintf("failed to open codec.\n");
  81                         return 1;
  82                 }
  83
  84                 if(!(fd = fopen(asset->path, "w")))
  85                 {
  86                         eprintf("Error while opening \"%s\" for writing. \n%m\n", asset->path);
  87                         return 1;
  88                 }
  89         }
  90         else
  91         {
  92                 if(!(fd = fopen(asset->path, "r")))
  93                 {
  94                         eprintf("Error while opening \"%s\" for reading. \n%m\n", asset->path);
  95                         return 1;
  96                 }
  97         }
  98
  99
 100
 101
 102         return 0;
 103 }
 104
 105 int FileAC3::close_file()
 106 {
 107         if(codec_context)
 108         {
 109                 avcodec_close(codec_context);
 110                 free(codec_context);
 111                 codec_context = 0;
 112                 codec = 0;
 113         }
 114         if(fd)
 115         {
 116                 fclose(fd);
 117                 fd = 0;
 118         }
 119         if(temp_raw)
 120         {
 121                 delete [] temp_raw;
 122                 temp_raw = 0;
 123         }
 124         if(temp_compressed)
 125         {
 126                 delete [] temp_compressed;
 127                 temp_compressed = 0;
 128         }
 129         reset_parameters();
 130         FileBase::close_file();
 131 }
 132
 133 // Channel conversion matrices because ffmpeg encodes a
 134 // different channel order than liba52 decodes.
 135 // Each row is an output channel.
 136 // Each column is an input channel.
 137 // static int channels5[] =
 138 // {
 139 //      { }
 140 // };
 141 //
 142 // static int channels6[] =
 143 // {
 144 //      { }
 145 // };
 146
 147
 148 int FileAC3::write_samples(double **buffer, int64_t len)
 149 {
 150 // Convert buffer to encoder format
 151         if(temp_raw_size + len > temp_raw_allocated)
 152         {
 153                 int new_allocated = temp_raw_size + len;
 154                 int16_t *new_raw = new int16_t[new_allocated * asset->channels];
 155                 if(temp_raw)
 156                 {
 157                         memcpy(new_raw,
 158                                 temp_raw,
 159                                 sizeof(int16_t) * temp_raw_size * asset->channels);
 160                         delete [] temp_raw;
 161                 }
 162                 temp_raw = new_raw;
 163                 temp_raw_allocated = new_allocated;
 164         }
 165
 166 // Allocate compressed data buffer
 167         if(temp_raw_allocated * asset->channels * 2 > compressed_allocated)
 168         {
 169                 compressed_allocated = temp_raw_allocated * asset->channels * 2;
 170                 delete [] temp_compressed;
 171                 temp_compressed = new unsigned char[compressed_allocated];
 172         }
 173
 174 // Append buffer to temp raw
 175         int16_t *out_ptr = temp_raw + temp_raw_size * asset->channels;
 176         for(int i = 0; i < len; i++)
 177         {
 178                 for(int j = 0; j < asset->channels; j++)
 179                 {
 180                         int sample = (int)(buffer[j][i] * 32767);
 181                         CLAMP(sample, -32768, 32767);
 182                         *out_ptr++ = sample;
 183                 }
 184         }
 185         temp_raw_size += len;
 186
 187         int frame_size = codec_context->frame_size;
 188         int output_size = 0;
 189         int current_sample = 0;
 190         for(current_sample = 0;
 191                 current_sample + frame_size <= temp_raw_size;
 192                 current_sample += frame_size)
 193         {
 194                 int compressed_size = avcodec_encode_audio(
 195                         codec_context,
 196                         temp_compressed + output_size,
 197                         compressed_allocated - output_size,
 198             temp_raw + current_sample * asset->channels);
 199                 output_size += compressed_size;
 200         }
 201
 202 // Shift buffer back
 203         memcpy(temp_raw,
 204                 temp_raw + current_sample * asset->channels,
 205                 (temp_raw_size - current_sample) * sizeof(int16_t) * asset->channels);
 206         temp_raw_size -= current_sample;
 207
 208         int bytes_written = fwrite(temp_compressed, 1, output_size, fd);
 209         if(bytes_written < output_size)
 210         {
 211                 eprintf("Error while writing samples. \n%m\n");
 212                 return 1;
 213         }
 214         return 0;
 215 }
 216
 217
 218
 219
 220
 221
 222
 223 AC3ConfigAudio::AC3ConfigAudio(BC_WindowBase *parent_window,
 224         Asset_GC asset)
 225  : BC_Window(PROGRAM_NAME ": Audio Compression",
 226         parent_window->get_abs_cursor_x(1),
 227         parent_window->get_abs_cursor_y(1),
 228         500,
 229         BC_OKButton::calculate_h() + 100,
 230         500,
 231         BC_OKButton::calculate_h() + 100,
 232         0,
 233         0,
 234         1)
 235 {
 236         this->parent_window = parent_window;
 237         this->asset = asset;
 238 }
 239
 240 void AC3ConfigAudio::create_objects()
 241 {
 242         int x = 10, y = 10;
 243         int x1 = 150;
 244         add_tool(new BC_Title(x, y, "Bitrate (kbps):"));
 245         AC3ConfigAudioBitrate *bitrate;
 246         add_tool(bitrate =
 247                 new AC3ConfigAudioBitrate(this,
 248                         x1,
 249                         y));
 250         bitrate->create_objects();
 251
 252         add_subwindow(new BC_OKButton(this));
 253         show_window();
 254         flush();
 255 }
 256
 257 int AC3ConfigAudio::close_event()
 258 {
 259         set_done(0);
 260         return 1;
 261 }
 262
 263
 264
 265
 266
 267
 268 AC3ConfigAudioBitrate::AC3ConfigAudioBitrate(AC3ConfigAudio *gui,
 269         int x,
 270         int y)
 271  : BC_PopupMenu(x,
 272         y,
 273         150,
 274         AC3ConfigAudioBitrate::bitrate_to_string(gui->string, gui->asset->ac3_bitrate))
 275 {
 276         this->gui = gui;
 277 }
 278
 279 char* AC3ConfigAudioBitrate::bitrate_to_string(char *string, int bitrate)
 280 {
 281         sprintf(string, "%d", bitrate);
 282         return string;
 283 }
 284
 285 void AC3ConfigAudioBitrate::create_objects()
 286 {
 287         add_item(new BC_MenuItem("32"));
 288         add_item(new BC_MenuItem("40"));
 289         add_item(new BC_MenuItem("48"));
 290         add_item(new BC_MenuItem("56"));
 291         add_item(new BC_MenuItem("64"));
 292         add_item(new BC_MenuItem("80"));
 293         add_item(new BC_MenuItem("96"));
 294         add_item(new BC_MenuItem("112"));
 295         add_item(new BC_MenuItem("128"));
 296         add_item(new BC_MenuItem("160"));
 297         add_item(new BC_MenuItem("192"));
 298         add_item(new BC_MenuItem("224"));
 299         add_item(new BC_MenuItem("256"));
 300         add_item(new BC_MenuItem("320"));
 301         add_item(new BC_MenuItem("384"));
 302         add_item(new BC_MenuItem("448"));
 303         add_item(new BC_MenuItem("512"));
 304         add_item(new BC_MenuItem("576"));
 305         add_item(new BC_MenuItem("640"));
 306 }
 307
 308 int AC3ConfigAudioBitrate::handle_event()
 309 {
 310         gui->asset->ac3_bitrate = atol(get_text());
 311         return 1;
 312 }
 313
 314
 315
 316 /*
 317 //      Local Variables:
 318 //      mode: C++
 319 //      c-file-style: "linux"
 320 //      End:
 321 */