ext/wavpack/gstwavpackcommon.h

/* GStreamer Wavpack plugin
 * Copyright (c) 2005 Arwed v. Merkatz <v.merkatz@gmx.net>
 * Copyright (c) 2006 Sebastian Dröge <slomo@circular-chaos.org>
 *
 * gstwavpackcommon.h: common helper functions
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __GST_WAVPACK_COMMON_H__
#define __GST_WAVPACK_COMMON_H__

#include <gst/gst.h>
#include <gst/audio/audio.h>
#include <wavpack/wavpack.h>

typedef struct
{
  guint32 byte_length;
  guint8 *data;
  guint8 id;
} GstWavpackMetadata;

#define ID_UNIQUE               0x3f
#define ID_OPTIONAL_DATA        0x20
#define ID_ODD_SIZE             0x40
#define ID_LARGE                0x80

#define ID_DUMMY                0x0
#define ID_ENCODER_INFO         0x1
#define ID_DECORR_TERMS         0x2
#define ID_DECORR_WEIGHTS       0x3
#define ID_DECORR_SAMPLES       0x4
#define ID_ENTROPY_VARS         0x5
#define ID_HYBRID_PROFILE       0x6
#define ID_SHAPING_WEIGHTS      0x7
#define ID_FLOAT_INFO           0x8
#define ID_INT32_INFO           0x9
#define ID_WV_BITSTREAM         0xa
#define ID_WVC_BITSTREAM        0xb
#define ID_WVX_BITSTREAM        0xc
#define ID_CHANNEL_INFO         0xd

#define ID_RIFF_HEADER          (ID_OPTIONAL_DATA | 0x1)
#define ID_RIFF_TRAILER         (ID_OPTIONAL_DATA | 0x2)
#define ID_REPLAY_GAIN          (ID_OPTIONAL_DATA | 0x3)
#define ID_CUESHEET             (ID_OPTIONAL_DATA | 0x4)
#define ID_CONFIG_BLOCK         (ID_OPTIONAL_DATA | 0x5)
#define ID_MD5_CHECKSUM         (ID_OPTIONAL_DATA | 0x6)
#define ID_SAMPLE_RATE          (ID_OPTIONAL_DATA | 0x7)


gboolean gst_wavpack_read_header (WavpackHeader * header, guint8 * buf);
gboolean gst_wavpack_read_metadata (GstWavpackMetadata * meta,
    guint8 * header_data, guint8 ** p_data);
gint gst_wavpack_get_default_channel_mask (gint nchannels);
gboolean gst_wavpack_get_channel_positions (gint nchannels, gint layout, GstAudioChannelPosition *pos);
GstAudioChannelPosition *gst_wavpack_get_default_channel_positions (gint nchannels);
gint gst_wavpack_get_channel_mask_from_positions (GstAudioChannelPosition *pos, gint nchannels);
gboolean gst_wavpack_set_channel_mapping (GstAudioChannelPosition *pos, gint nchannels, gint8 *channel_mapping);

#endif