libswfdec/swfdec_sound.h

   1 /* Swfdec
   2  * Copyright (C) 2003-2006 David Schleef <ds@schleef.org>
   3  *               2005-2006 Eric Anholt <eric@anholt.net>
   4  *               2006-2007 Benjamin Otte <otte@gnome.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA  02110-1301  USA
  20  */
  21
  22 #ifndef _SWFDEC_SOUND_H_
  23 #define _SWFDEC_SOUND_H_
  24
  25 #include <libswfdec/swfdec_cached.h>
  26 #include <libswfdec/swfdec_codec_audio.h>
  27 #include <libswfdec/swfdec_swf_decoder.h>
  28 #include <libswfdec/swfdec_types.h>
  29
  30 G_BEGIN_DECLS
  31
  32 //typedef struct _SwfdecSoundChunk SwfdecSoundChunk;
  33 //typedef struct _SwfdecSound SwfdecSound;
  34 typedef struct _SwfdecSoundClass SwfdecSoundClass;
  35 typedef struct _SwfdecSoundEnvelope SwfdecSoundEnvelope;
  36
  37 #define SWFDEC_TYPE_SOUND                    (swfdec_sound_get_type())
  38 #define SWFDEC_IS_SOUND(obj)                 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SWFDEC_TYPE_SOUND))
  39 #define SWFDEC_IS_SOUND_CLASS(klass)         (G_TYPE_CHECK_CLASS_TYPE ((klass), SWFDEC_TYPE_SOUND))
  40 #define SWFDEC_SOUND(obj)                    (G_TYPE_CHECK_INSTANCE_CAST ((obj), SWFDEC_TYPE_SOUND, SwfdecSound))
  41 #define SWFDEC_SOUND_CLASS(klass)            (G_TYPE_CHECK_CLASS_CAST ((klass), SWFDEC_TYPE_SOUND, SwfdecSoundClass))
  42
  43 struct _SwfdecSoundEnvelope {
  44   guint         offset;                 /* offset in frames */
  45   guint16               volume[2];              /* volume to use */
  46 };
  47
  48 struct _SwfdecSoundChunk
  49 {
  50   SwfdecSound *         sound;                  /* sound to play */
  51
  52   int                   stop;                   /* stop the sample being played */
  53   int                   no_restart;             /* don't restart if already playing */
  54
  55   guint                 start_sample;           /* sample at which to start playing */
  56   guint                 stop_sample;            /* first sample to not play anymore */
  57   guint                 loop_count;             /* amount of times this sample should be played back */
  58   guint                 n_envelopes;            /* amount of points in the envelope */
  59   SwfdecSoundEnvelope * envelope;               /* volume envelope or NULL if none */
  60 };
  61
  62 struct _SwfdecSound
  63 {
  64   SwfdecCached          cached;
  65
  66   SwfdecAudioCodec      format;                 /* format in use */
  67   SwfdecAudioFormat     original_format;        /* channel/rate information */
  68   guint                 n_samples;              /* total number of samples when decoded to 44100kHz */
  69   guint                 skip;                   /* samples to skip at start */
  70   SwfdecBuffer *        encoded;                /* encoded data */
  71
  72   SwfdecAudioFormat     decoded_format;         /* format of decoded data */
  73   SwfdecBuffer *        decoded;                /* decoded data */
  74 };
  75
  76 struct _SwfdecSoundClass
  77 {
  78   SwfdecCachedClass     cached_class;
  79 };
  80
  81 GType swfdec_sound_get_type (void);
  82
  83 int tag_func_define_sound (SwfdecSwfDecoder * s, guint tag);
  84 int tag_func_sound_stream_block (SwfdecSwfDecoder * s, guint tag);
  85 int tag_func_sound_stream_head (SwfdecSwfDecoder * s, guint tag);
  86 int tag_func_start_sound (SwfdecSwfDecoder * s, guint tag);
  87 int tag_func_define_button_sound (SwfdecSwfDecoder * s, guint tag);
  88
  89 void                    swfdec_sound_render             (SwfdecSound *          sound,
  90                                                          gint16 *               dest,
  91                                                          guint          offset,
  92                                                          guint          len);
  93 void                    swfdec_sound_buffer_render      (gint16 *               dest,
  94                                                          const SwfdecBuffer *   source,
  95                                                          SwfdecAudioFormat              format,
  96                                                          const SwfdecBuffer *   previous,
  97                                                          guint          offset,
  98                                                          guint          n_samples);
  99 guint                   swfdec_sound_buffer_get_n_samples (const SwfdecBuffer * buffer,
 100                                                          SwfdecAudioFormat              format);
 101
 102 SwfdecSoundChunk *      swfdec_sound_parse_chunk        (SwfdecSwfDecoder *     s,
 103                                                          int                    id);
 104 void                    swfdec_sound_chunk_free         (SwfdecSoundChunk *     chunk);
 105
 106
 107 G_END_DECLS
 108 #endif