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137 lines
3.9 KiB
137 lines
3.9 KiB
15 years ago
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/* GSL - Generic Sound Layer
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* Copyright (C) 2001-2002 Tim Janik and Stefan Westerfeld
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GSL_LOADER_H__
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#define __GSL_LOADER_H__
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#include <gsl/gsldefs.h>
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#include <gsl/gslcommon.h>
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#include <gsl/gslwavechunk.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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typedef struct _GslWaveFileInfo GslWaveFileInfo;
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typedef struct _GslWaveDsc GslWaveDsc;
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typedef struct _GslWaveChunkDsc GslWaveChunkDsc;
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/* --- structures --- */
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struct _GslWaveFileInfo
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{
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guint n_waves;
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struct {
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gchar *name;
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} *waves;
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/*< private >*/
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gchar *file_name;
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GslLoader *loader;
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guint ref_count;
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};
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struct _GslWaveDsc
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{
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gchar *name;
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guint n_chunks;
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GslWaveChunkDsc *chunks;
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guint n_channels;
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/*< private >*/
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GslWaveFileInfo *file_info;
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};
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struct _GslWaveChunkDsc
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{
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gfloat osc_freq;
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gfloat mix_freq;
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GslWaveLoopType loop_type;
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GslLong loop_start; /* sample offset */
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GslLong loop_end; /* sample offset */
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guint loop_count;
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/* loader-specific */
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GslLong loader_offset;
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GslLong loader_length;
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gpointer loader_data1; /* generic pointers for more data */
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gpointer loader_data2;
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};
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/* --- functions --- */
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GslWaveFileInfo* gsl_wave_file_info_load (const gchar *file_name,
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GslErrorType *error);
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GslWaveFileInfo* gsl_wave_file_info_ref (GslWaveFileInfo *wave_file_info);
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void gsl_wave_file_info_unref (GslWaveFileInfo *wave_file_info);
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GslWaveDsc* gsl_wave_dsc_load (GslWaveFileInfo *wave_file_info,
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guint nth_wave,
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GslErrorType *error);
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void gsl_wave_dsc_free (GslWaveDsc *wave_dsc);
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GslDataHandle* gsl_wave_handle_create (GslWaveDsc *wave_dsc,
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guint nth_chunk,
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GslErrorType *error);
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GslWaveChunk* gsl_wave_chunk_create (GslWaveDsc *wave_dsc,
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guint nth_chunk,
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GslErrorType *error);
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/* --- loader impl --- */
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struct _GslLoader
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{
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const gchar *name; /* format/loader name, e.g. "GslWave" or "WAVE audio, RIFF (little-endian)" */
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/* at least one of the
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* following three must
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* be non-NULL
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*/
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const gchar **extensions; /* e.g.: "mp3", "ogg" or "gslwave" */
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const gchar **mime_types; /* e.g.: "audio/x-mpg3" or "audio/x-wav" */
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const gchar **magic_specs; /* e.g.: "0 string RIFF\n8 string WAVE\n" or "0 string #GslWave\n" */
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gint priority; /* -100=high, +100=low, 0=default */
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/*< private >*/
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gpointer data;
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GslWaveFileInfo* (*load_file_info) (gpointer data,
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const gchar *file_name,
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GslErrorType *error);
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void (*free_file_info) (gpointer data,
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GslWaveFileInfo *file_info);
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GslWaveDsc* (*load_wave_dsc) (gpointer data,
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GslWaveFileInfo *file_info,
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guint nth_wave,
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GslErrorType *error);
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void (*free_wave_dsc) (gpointer data,
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GslWaveDsc *wave_dsc);
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GslDataHandle* (*create_chunk_handle) (gpointer data,
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GslWaveDsc *wave_dsc,
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guint nth_chunk,
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GslErrorType *error);
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GslLoader *next; /* must be NULL */
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};
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void gsl_loader_register (GslLoader *loader);
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GslLoader* gsl_loader_match (const gchar *file_name);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GSL_LOADER_H__ */
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