SDL_sound_CoreAudio: decoders/smpeg.c annotate

annotate decoders/smpeg.c @ 377:cbb15ecf423a

WinCE (PocketPC) patches from Tyler.

author	Ryan C. Gordon <icculus@icculus.org>
date	Tue, 02 Jul 2002 03:58:24 +0000
parents	f11c10ffa31a
children	fb519e6028e3

rev	line source
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	2 * SDL_sound -- An abstract sound format decoding API.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	3 * Copyright (C) 2001 Ryan C. Gordon.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	4 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	5 * This library is free software; you can redistribute it and/or
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	6 * modify it under the terms of the GNU Lesser General Public
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	7 * License as published by the Free Software Foundation; either
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	8 * version 2.1 of the License, or (at your option) any later version.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	9 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	10 * This library is distributed in the hope that it will be useful,
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	13 * Lesser General Public License for more details.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	14 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	15 * You should have received a copy of the GNU Lesser General Public
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	16 * License along with this library; if not, write to the Free Software
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	18 */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	19
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	20 /*
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	21 * MPEG-1 Layer 3, or simply, "MP3", decoder for SDL_sound.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	22 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	23 * This driver handles all those highly compressed songs you stole through
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	24 * Napster. :) It depends on the SMPEG library for decoding, which can
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	25 * be grabbed from: http://www.lokigames.com/development/smpeg.php3
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	26 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	27 * This should also be able to extract the audio stream from an MPEG movie.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	29 * There is an alternative MP3 decoder available, called "mpglib", which
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	30 * doesn't depend on external libraries (the decoder itself is part of
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	31 * SDL_sound), and may be more efficient, but less flexible than SMPEG. YMMV.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	32 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	33 * Please see the file COPYING in the source's root directory.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	34 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	35 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	36 */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	37
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	38 #if HAVE_CONFIG_H
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	39 # include <config.h>
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	40 #endif
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	41
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	42 #ifdef SOUND_SUPPORTS_SMPEG
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	43
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	44 #include <stdio.h>
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	45 #include <stdlib.h>
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	46 #include <string.h>
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	47
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	48 #include "SDL_sound.h"
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50 #define __SDL_SOUND_INTERNAL__
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	51 #include "SDL_sound_internal.h"
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	52
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	53 #include "smpeg.h"
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	54 #include "extra_rwops.h"
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	57 static int _SMPEG_init(void);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58 static void _SMPEG_quit(void);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 static int _SMPEG_open(Sound_Sample sample, const char ext);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	60 static void _SMPEG_close(Sound_Sample *sample);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	61 static Uint32 _SMPEG_read(Sound_Sample *sample);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	62 static int _SMPEG_rewind(Sound_Sample *sample);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 301 diff changeset	63 static int _SMPEG_seek(Sound_Sample *sample, Uint32 ms);
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	64
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	65 static const char *extensions_smpeg[] = { "MP3", "MPEG", "MPG", NULL };
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	66 const Sound_DecoderFunctions __Sound_DecoderFunctions_SMPEG =
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	67 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	68 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	69 extensions_smpeg,
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	70 "MPEG-1 Layer 3 audio through SMPEG",
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	71 "Ryan C. Gordon <icculus@clutteredmind.org>",
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	72 "http://icculus.org/smpeg/"
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	73 },
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	74
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	75 _SMPEG_init, /* init() method */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	76 _SMPEG_quit, /* quit() method */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	77 _SMPEG_open, /* open() method */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	78 _SMPEG_close, /* close() method */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	79 _SMPEG_read, /* read() method */
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 301 diff changeset	80 _SMPEG_rewind, /* rewind() method */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 301 diff changeset	81 _SMPEG_seek /* seek() method */
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	82 };
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	83
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	84
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	85 static int _SMPEG_init(void)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	86 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	87 return(1); /* always succeeds. */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	88 } /* _SMPEG_init */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	89
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	90
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	91 static void _SMPEG_quit(void)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	92 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	93 /* it's a no-op. */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	94 } /* _SMPEG_quit */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	95
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	96
301 ca43129df299 Visual C fixes. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	97 static inline void output_version(void)
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	98 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	99 static int first_time = 1;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	100
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	101 if (first_time)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	102 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	103 SMPEG_version v;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	104 SMPEG_VERSION(&v);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	105 SNDDBG(("SMPEG: Compiled against SMPEG v%d.%d.%d.\n",
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	106 v.major, v.minor, v.patch));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	107 first_time = 0;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108 } /* if */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	109 } /* output_version */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	110
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	111
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	112 static int _SMPEG_open(Sound_Sample sample, const char ext)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	114 SMPEG *smpeg;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115 SMPEG_Info smpeg_info;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 SDL_AudioSpec spec;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	118 SDL_RWops *refCounter;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120 output_version();
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	121
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	122 /*
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	123 * If I understand things correctly, MP3 files don't really have any
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	124 * magic header we can check for. The MP3 player is expected to just
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	125 * pick the first thing that looks like a valid frame and start
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	126 * playing from there.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	127 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	128 * So here's what we do: If the caller insists that this is really
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	129 * MP3 we'll take his word for it. Otherwise, use the same test as
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	130 * SDL_mixer does and check if the stream starts with something that
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	131 * looks like a frame.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	132 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	133 * A frame begins with 11 bits of frame sync (all bits must be set),
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	134 * followed by a two-bit MPEG Audio version ID:
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	135 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	136 * 00 - MPEG Version 2.5 (later extension of MPEG 2)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	137 * 01 - reserved
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	138 * 10 - MPEG Version 2 (ISO/IEC 13818-3)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	139 * 11 - MPEG Version 1 (ISO/IEC 11172-3)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	140 *
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	141 * Apparently we don't handle MPEG Version 2.5.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	142 */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	143 if (__Sound_strcasecmp(ext, "MP3") != 0)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	144 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	145 Uint8 mp3_magic[2];
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	146
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	147 if (SDL_RWread(internal->rw, mp3_magic, sizeof (mp3_magic), 1) != 1)
358 f11c10ffa31a Fixed some debug messages. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	148 BAIL_MACRO("SMPEG: Could not read MP3 magic.", 0);
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	149
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	150 if (mp3_magic[0] != 0xFF \|\| (mp3_magic[1] & 0xF0) != 0xF0)
358 f11c10ffa31a Fixed some debug messages. Ryan C. Gordon <icculus@icculus.org> parents: 351 diff changeset	151 BAIL_MACRO("SMPEG: Not an MP3 stream.", 0);
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	152
351 069ce624d6cf FIXME cleanup. Ryan C. Gordon <icculus@icculus.org> parents: 326 diff changeset	153 /* If the seek fails, we'll probably miss a frame, but oh well */
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	154 SDL_RWseek(internal->rw, -sizeof (mp3_magic), SEEK_CUR);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	155 } /* if */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	156
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	157 refCounter = RWops_RWRefCounter_new(internal->rw);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	158 if (refCounter == NULL)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	159 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	160 SNDDBG(("SMPEG: Failed to create reference counting RWops.\n"));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	161 return(0);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	162 } /* if */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	163
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	164 /* replace original RWops. This is safe. Honest. :) */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	165 internal->rw = refCounter;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	166
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 /*
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	168 * increment the refcount, since SMPEG will nuke the RWops if it can't
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	169 * accept the contained data...
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	170 */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	171 RWops_RWRefCounter_addRef(refCounter);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	172 smpeg = SMPEG_new_rwops(refCounter, &smpeg_info, 0);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	173
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	174 if (SMPEG_error(smpeg))
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	175 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	176 Sound_SetError(SMPEG_error(smpeg));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	177 SMPEG_delete(smpeg);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	178 return(0);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	179 } /* if */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	180
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	181 if (!smpeg_info.has_audio)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	182 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183 Sound_SetError("SMPEG: No audio stream found in data.");
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	184 SMPEG_delete(smpeg);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	185 return(0);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	186 } /* if */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	187
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	188 SNDDBG(("SMPEG: Accepting data stream.\n"));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189 SNDDBG(("SMPEG: has_audio == {%s}.\n", smpeg_info.has_audio ? "TRUE" : "FALSE"));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 SNDDBG(("SMPEG: has_video == {%s}.\n", smpeg_info.has_video ? "TRUE" : "FALSE"));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191 SNDDBG(("SMPEG: width == (%d).\n", smpeg_info.width));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 SNDDBG(("SMPEG: height == (%d).\n", smpeg_info.height));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	193 SNDDBG(("SMPEG: current_frame == (%d).\n", smpeg_info.current_frame));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 SNDDBG(("SMPEG: current_fps == (%f).\n", smpeg_info.current_fps));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195 SNDDBG(("SMPEG: audio_string == [%s].\n", smpeg_info.audio_string));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	196 SNDDBG(("SMPEG: audio_current_frame == (%d).\n", smpeg_info.audio_current_frame));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	197 SNDDBG(("SMPEG: current_offset == (%d).\n", smpeg_info.current_offset));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198 SNDDBG(("SMPEG: total_size == (%d).\n", smpeg_info.total_size));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199 SNDDBG(("SMPEG: current_time == (%f).\n", smpeg_info.current_time));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	200 SNDDBG(("SMPEG: total_time == (%f).\n", smpeg_info.total_time));
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	201
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	202 SMPEG_enablevideo(smpeg, 0);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	203 SMPEG_enableaudio(smpeg, 1);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	204 SMPEG_loop(smpeg, 0);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	205
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	206 SMPEG_wantedSpec(smpeg, &spec);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	207
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	208 /*
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	209 * One of the MP3s I tried wouldn't work unless I added this line
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	210 * to tell SMPEG that yes, it may have the spec it wants.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	211 */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	212 SMPEG_actualSpec(smpeg, &spec);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	213 sample->actual.format = spec.format;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	214 sample->actual.rate = spec.freq;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	215 sample->actual.channels = spec.channels;
326 1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	216 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	217 internal->decoder_private = smpeg;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	218
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	219 SMPEG_play(smpeg);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	220 return(1);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	221 } /* _SMPEG_open */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	222
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	223
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	224 static void _SMPEG_close(Sound_Sample *sample)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	225 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	226 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	227 SMPEG_delete((SMPEG *) internal->decoder_private);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	228 } /* _SMPEG_close */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	229
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	230
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	231 static Uint32 _SMPEG_read(Sound_Sample *sample)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	232 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	233 Uint32 retval;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	234 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	235 SMPEG smpeg = (SMPEG ) internal->decoder_private;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	236
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	237 /*
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	238 * We have to clear the buffer because apparently SMPEG_playAudio()
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	239 * will mix the decoded audio with whatever's already in it. Nasty.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	240 */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	241 memset(internal->buffer, '\0', internal->buffer_size);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	242 retval = SMPEG_playAudio(smpeg, internal->buffer, internal->buffer_size);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	243 if (retval < internal->buffer_size)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	244 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	245 char *errMsg = SMPEG_error(smpeg);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	246 if (errMsg == NULL)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	247 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	248 else
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	249 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	250 Sound_SetError(errMsg);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	251 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	252 } /* else */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	253 } /* if */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	254
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	255 return(retval);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	256 } /* _SMPEG_read */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	258
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	259 static int _SMPEG_rewind(Sound_Sample *sample)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	260 {
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	261 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	262 SMPEG smpeg = (SMPEG ) internal->decoder_private;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	263 SMPEGstatus status;
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	265 /*
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	266 * SMPEG_rewind() really means "stop and rewind", so we may have to
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	267 * restart it afterwards.
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	268 */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	269 status = SMPEG_status(smpeg);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	270 SMPEG_rewind(smpeg);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	271 if (status == SMPEG_PLAYING)
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	272 SMPEG_play(smpeg);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	273 return(1);
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	274 } /* _SMPEG_rewind */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	275
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 301 diff changeset	276
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 301 diff changeset	277 static int _SMPEG_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 301 diff changeset	278 {
326 1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	279 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	280 SMPEG smpeg = (SMPEG ) internal->decoder_private;
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	281 SMPEGstatus status;
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	282
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	283 /*
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	284 * SMPEG_rewind() really means "stop and rewind", so we may have to
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	285 * restart it afterwards.
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	286 */
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	287 status = SMPEG_status(smpeg);
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	288 SMPEG_rewind(smpeg);
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	289 SMPEG_skip(smpeg, ((float) ms) / 1000.0);
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	290 if (status == SMPEG_PLAYING)
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	291 SMPEG_play(smpeg);
1b33baef9bf9 Added seek method. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	292 return(1);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 301 diff changeset	293 } /* _SMPEG_seek */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 301 diff changeset	294
260 44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	295 #endif /* SOUND_SUPPORTS_SMPEG */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	296
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	297 /* end of smpeg.c ... */
44a4730a1e6f Renamed from mp3.c, some minor changes to avoid symbol clash. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	298

Mercurial > SDL_sound_CoreAudio

annotate decoders/smpeg.c @ 377:cbb15ecf423a