shithub: mp3dec

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Create indexes on seek with MP3D_DO_NOT_SCAN open flag.

--- a/minimp3_ex.h

+++ b/minimp3_ex.h

@@ -73,7 +73,7 @@

     mp3dec_frame_info_t info;

     mp3d_sample_t buffer[MINIMP3_MAX_SAMPLES_PER_FRAME];

     size_t input_consumed, input_filled;

-    int is_file, flags, vbr_tag_found;

+    int is_file, flags, vbr_tag_found, indexes_built;

     int free_format_bytes;

     int buffer_samples, buffer_consumed, to_skip, start_delay;

     int last_error;

@@ -675,6 +675,8 @@

         return ret;

     mp3dec_init(&dec->mp3d);

     dec->buffer_samples = 0;

+    dec->indexes_built = !(dec->vbr_tag_found || (flags & MP3D_DO_NOT_SCAN));

+    dec->flags &= (~MP3D_DO_NOT_SCAN);

     return 0;

 }

@@ -728,8 +730,9 @@

         dec->to_skip = 0;

         goto do_exit;

     }

-    if (!dec->index.frames && dec->vbr_tag_found)

-    {   /* no index created yet (vbr tag used to calculate track length) */

+    if (!dec->indexes_built)

+    {   /* no index created yet (vbr tag used to calculate track length or MP3D_DO_NOT_SCAN open flag used) */

+        dec->indexes_built = 1;

         dec->samples = 0;

         dec->buffer_samples = 0;

         if (dec->io)

@@ -1291,6 +1294,8 @@

         return MP3D_E_IOERROR;

     mp3dec_init(&dec->mp3d);

     dec->buffer_samples = 0;

+    dec->indexes_built = !(dec->vbr_tag_found || (flags & MP3D_DO_NOT_SCAN));

+    dec->flags &= (~MP3D_DO_NOT_SCAN);

     return 0;

 }