[linux-dvb] Re: Howto: how to play back vdr recodings with AC3 sound.

[Carsten Koch <Carsten.Koch@icem.de>]

Carsten Koch wrote:
....
> Step 6: Install the specially patched ac3dec tool.
....
>   3) patch ac3dec so it does not mute anything before it has actually
>      received the first data block.

I have made some improvements to the patch, so now ac3dec
no longer crashes when it does not find any AC3 data:

--- ac3dec.c-original   Wed Aug  8 20:49:04 2001
+++ ac3dec.c    Fri Aug 10 02:36:30 2001
@@ -208,21 +208,26 @@
                                //Send the samples to the output device 
                                output_play(ac3_frame->audio_data, 256 * 6);
                        } while((ac3_frame = ac3_decode_frame()));
+                       output_close();
                } else {
                        uint_8 *start, *end;
                        init_spdif();
-                       if (output_open(&out_config) < 0) {
-                               fprintf(stderr, "Output open failed\n");
-                               exit(EXIT_FAILURE);
+                       if (fill_buffer(&start, &end) > 0)
+                       {
+                               if (output_open(&out_config) < 0) {
+                                       fprintf(stderr, "Output open failed\n");
+                                       exit(EXIT_FAILURE);
+                               }
+                               signal(SIGINT, ac3dec_signal_handler);
+                               signal(SIGTERM, ac3dec_signal_handler);
+                               signal(SIGABRT, ac3dec_signal_handler);
+                               if (output_spdif(start, end, quiet) >= 0)
+                                       while (fill_buffer(&start, &end) > 0)
+                                               if (output_spdif(start, end, quiet) < 0)
+                                                       break;
+                               output_close();
                        }
-                       signal(SIGINT, ac3dec_signal_handler);
-                       signal(SIGTERM, ac3dec_signal_handler);
-                       signal(SIGABRT, ac3dec_signal_handler);
-                       while (fill_buffer(&start, &end) > 0)
-                               if (output_spdif(start, end, quiet) < 0)
-                                       break;
                }
-               output_close();
                fclose(in_file);
        }
        return EXIT_SUCCESS;


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