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130 lines
3.9 KiB
130 lines
3.9 KiB
/* GSL - Generic Sound Layer
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* Copyright (C) 2001 Tim Janik
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GSL_WAVE_CHUNK_H__
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#define __GSL_WAVE_CHUNK_H__
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#include <gsl/gsldefs.h>
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#include <gsl/gsldatacache.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/* --- typedefs & structures --- */
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typedef enum /*< skip >*/
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{
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GSL_WAVE_LOOP_NONE,
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GSL_WAVE_LOOP_JUMP,
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GSL_WAVE_LOOP_PINGPONG
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} GslWaveLoopType;
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typedef struct
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{
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GslLong start, end, length;
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gfloat *mem;
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} GslWaveChunkMem;
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struct _GslWaveChunk
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{
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/* wave chunk data residency */
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GslDataCache *dcache;
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GslLong length; /* number of per-channel-values * n-channels */
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/* chunk specific parameters */
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gint n_channels;
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GslLong n_pad_values; /* guaranteed pad values around blocks */
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GslLong wave_length; /* start + loop duration + end (single channel) */
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/* flags */
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guint pploop_ends_backwards : 1;
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guint mini_loop : 1;
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/* loop spec */
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GslWaveLoopType loop_type;
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GslLong loop_first;
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GslLong loop_last;
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guint loop_count;
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/* preformatted blocks */
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GslWaveChunkMem head;
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GslWaveChunkMem enter;
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GslWaveChunkMem wrap;
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GslWaveChunkMem ppwrap;
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GslWaveChunkMem leave;
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GslWaveChunkMem tail;
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GslLong leave_end_norm;
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GslLong tail_start_norm;
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GslWaveLoopType requested_loop_type;
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GslLong requested_loop_first;
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GslLong requested_loop_last;
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guint requested_loop_count;
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guint ref_count;
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guint open_count;
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/* legacy */
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gfloat mix_freq; /* recorded with mix_freq */
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gfloat osc_freq; /* while oscillating at osc_freq */
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};
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struct _GslWaveChunkBlock
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{
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/* requisition (in) */
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gint play_dir; /* usually +1 */
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GslLong offset; /* requested offset into wave */
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/* result (out) */
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GslLong length; /* resulting signed? length of block in # values */
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gboolean is_silent; /* sample end reached, values are 0 */
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gint dirstride; /* >0 => increment, <0 => decrement */
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gfloat *start; /* first data value location */
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gfloat *end; /* last data value location +1 */
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GslLong next_offset; /* offset of next adjunct block */
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/*< private >*/
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gpointer node;
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};
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/* --- prototypes --- */
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void gsl_wave_chunk_use_block (GslWaveChunk *wave_chunk,
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GslWaveChunkBlock *block);
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void gsl_wave_chunk_unuse_block (GslWaveChunk *wave_chunk,
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GslWaveChunkBlock *block);
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GslWaveChunk* gsl_wave_chunk_new (GslDataCache *dcache,
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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_first,
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GslLong loop_end,
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guint loop_count);
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GslWaveChunk* gsl_wave_chunk_ref (GslWaveChunk *wchunk);
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void gsl_wave_chunk_unref (GslWaveChunk *wchunk);
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GslErrorType gsl_wave_chunk_open (GslWaveChunk *wchunk);
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void gsl_wave_chunk_close (GslWaveChunk *wchunk);
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void gsl_wave_chunk_debug_block (GslWaveChunk *wchunk,
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GslLong offset,
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GslLong length,
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gfloat *block);
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GslWaveChunk* _gsl_wave_chunk_copy (GslWaveChunk *wchunk);
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const gchar* gsl_wave_loop_type_to_string (GslWaveLoopType wave_loop);
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GslWaveLoopType gsl_wave_loop_type_from_string (const gchar *string);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GSL_WAVE_CHUNK_H__ */
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