Mercurial > SDL_sound_CoreAudio

comparison decoders/aiff.c @ 332:8ba541e81c1e

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seek method implementation.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 20 May 2002 09:41:38 +0000
parents c97be6e1bd27
children d76a34316c84
comparison
equal deleted inserted replaced
331:e683cb99f88f 332:8ba541e81c1e
99 Uint32 data_starting_offset; 99 Uint32 data_starting_offset;
100 100
101 void (*free)(struct S_AIFF_FMT_T *fmt); 101 void (*free)(struct S_AIFF_FMT_T *fmt);
102 Uint32 (*read_sample)(Sound_Sample *sample); 102 Uint32 (*read_sample)(Sound_Sample *sample);
103 int (*rewind_sample)(Sound_Sample *sample); 103 int (*rewind_sample)(Sound_Sample *sample);
104 int (*seek_sample)(Sound_Sample *sample, Uint32 ms);
104 105
105 106
106 #if 0 107 #if 0
107 /* 108 /*
108 this is ripped from wav.c as ann example of format-specific data. 109 this is ripped from wav.c as ann example of format-specific data.
330 /* no-op. */ 331 /* no-op. */
331 return(1); 332 return(1);
332 } /* rewind_sample_fmt_normal */ 333 } /* rewind_sample_fmt_normal */
333 334
334 335
336 static int seek_sample_fmt_normal(Sound_Sample *sample, Uint32 ms)
337 {
338 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
339 aiff_t *a = (aiff_t *) internal->decoder_private;
340 fmt_t *fmt = &a->fmt;
341 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
342 int pos = (int) (fmt->data_starting_offset + offset);
343 int rc = SDL_RWseek(internal->rw, pos, SEEK_SET);
344 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0);
345 a->bytesLeft = fmt->total_bytes - offset;
346 return(1); /* success. */
347 } /* seek_sample_fmt_normal */
348
349
335 static void free_fmt_normal(fmt_t *fmt) 350 static void free_fmt_normal(fmt_t *fmt)
336 { 351 {
337 /* it's a no-op. */ 352 /* it's a no-op. */
338 } /* free_fmt_normal */ 353 } /* free_fmt_normal */
339 354
342 { 357 {
343 /* (don't need to read more from the RWops...) */ 358 /* (don't need to read more from the RWops...) */
344 fmt->free = free_fmt_normal; 359 fmt->free = free_fmt_normal;
345 fmt->read_sample = read_sample_fmt_normal; 360 fmt->read_sample = read_sample_fmt_normal;
346 fmt->rewind_sample = rewind_sample_fmt_normal; 361 fmt->rewind_sample = rewind_sample_fmt_normal;
362 fmt->seek_sample = seek_sample_fmt_normal;
347 return(1); 363 return(1);
348 } /* read_fmt_normal */ 364 } /* read_fmt_normal */
349 365
350 366
351 367
507 523
508 a->fmt.total_bytes = a->bytesLeft = bytes_per_sample * c.numSampleFrames; 524 a->fmt.total_bytes = a->bytesLeft = bytes_per_sample * c.numSampleFrames;
509 a->fmt.data_starting_offset = SDL_RWtell(rw); 525 a->fmt.data_starting_offset = SDL_RWtell(rw);
510 internal->decoder_private = (void *) a; 526 internal->decoder_private = (void *) a;
511 527
512 sample->flags = SOUND_SAMPLEFLAG_NONE; 528 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
513 529
514 SNDDBG(("AIFF: Accepting data stream.\n")); 530 SNDDBG(("AIFF: Accepting data stream.\n"));
515 return(1); /* we'll handle this data. */ 531 return(1); /* we'll handle this data. */
516 } /* AIFF_open */ 532 } /* AIFF_open */
517 533
545 } /* AIFF_rewind */ 561 } /* AIFF_rewind */
546 562
547 563
548 static int AIFF_seek(Sound_Sample *sample, Uint32 ms) 564 static int AIFF_seek(Sound_Sample *sample, Uint32 ms)
549 { 565 {
550 BAIL_MACRO("!!! FIXME: Not implemented", 0); 566 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
567 aiff_t *a = (aiff_t *) internal->decoder_private;
568 return(a->fmt.seek_sample(sample, ms));
551 } /* AIFF_seek */ 569 } /* AIFF_seek */
552 570
553 #endif /* SOUND_SUPPORTS_AIFF */ 571 #endif /* SOUND_SUPPORTS_AIFF */
554 572
555 /* end of aiff.c ... */ 573 /* end of aiff.c ... */