[2187] | 1 | //transcode_celt.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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| 5 | * |
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| 6 | * This file is part of libroardsp a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroardsp is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | */ |
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| 24 | |
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| 25 | #include "libroardsp.h" |
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| 26 | |
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| 27 | #ifdef ROAR_HAVE_LIBCELT |
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| 28 | |
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[2193] | 29 | #define _16BIT (16/8) |
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[2199] | 30 | #define _SIZE_LEN 2 |
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[2192] | 31 | |
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[2188] | 32 | int roar_xcoder_celt_init (struct roar_xcoder * state) { |
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[2191] | 33 | struct roar_xcoder_celt * self = malloc(sizeof(struct roar_xcoder_celt)); |
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| 34 | struct roar_audio_info * info = &(state->info.pcm); |
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| 35 | |
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| 36 | if ( self == NULL ) |
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| 37 | return -1; |
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| 38 | |
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| 39 | // curruntly only 16 bit mode is supported |
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| 40 | if ( info->bits != 16 ) { |
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| 41 | free(self); |
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| 42 | return -1; |
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| 43 | } |
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| 44 | |
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| 45 | memset(self, 0, sizeof(struct roar_xcoder_celt)); |
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| 46 | |
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| 47 | state->inst = self; |
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| 48 | |
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| 49 | self->frame_size = 256; |
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| 50 | |
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[2204] | 51 | self->bufferlen = info->channels * 32 + _SIZE_LEN; |
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[2199] | 52 | self->iobuffer = malloc(self->bufferlen); |
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| 53 | |
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| 54 | if ( self->iobuffer == NULL ) { |
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| 55 | free(self); |
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| 56 | return -1; |
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| 57 | } |
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| 58 | |
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[2191] | 59 | self->mode = celt_mode_create(info->rate, info->channels, self->frame_size, NULL); |
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| 60 | |
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| 61 | if ( self->mode == NULL ) { |
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| 62 | free(self); |
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| 63 | return -1; |
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| 64 | } |
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| 65 | |
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| 66 | if (state->encode) { |
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| 67 | self->encoder = celt_encoder_create(self->mode); |
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| 68 | if ( self->encoder == NULL ) { |
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| 69 | roar_xcoder_celt_uninit(state); |
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| 70 | return -1; |
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| 71 | } |
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| 72 | } else { |
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| 73 | self->decoder = celt_decoder_create(self->mode); |
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| 74 | if ( self->decoder == NULL ) { |
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| 75 | roar_xcoder_celt_uninit(state); |
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| 76 | return -1; |
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| 77 | } |
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| 78 | } |
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| 79 | |
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[2197] | 80 | ROAR_DBG("roar_xcoder_celt_init(*) = 0"); |
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| 81 | |
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[2191] | 82 | return 0; |
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[2188] | 83 | } |
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| 84 | |
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| 85 | int roar_xcoder_celt_uninit (struct roar_xcoder * state) { |
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[2191] | 86 | struct roar_xcoder_celt * self = state->inst; |
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| 87 | |
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[2199] | 88 | if ( self->iobuffer ) |
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| 89 | free(self->iobuffer); |
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| 90 | |
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[2191] | 91 | if ( self->encoder ) |
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[2200] | 92 | celt_encoder_destroy(self->encoder); |
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[2191] | 93 | |
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| 94 | if ( self->decoder ) |
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[2200] | 95 | celt_decoder_destroy(self->decoder); |
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[2191] | 96 | |
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| 97 | if ( self->mode ) |
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| 98 | celt_mode_destroy(self->mode); |
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| 99 | |
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| 100 | free(self); |
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| 101 | |
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[2197] | 102 | ROAR_DBG("roar_xcoder_celt_uninit(*) = 0"); |
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| 103 | |
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| 104 | return 0; |
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[2188] | 105 | } |
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| 106 | |
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| 107 | int roar_xcoder_celt_packet_size(struct roar_xcoder * state, int samples) { |
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[2191] | 108 | struct roar_xcoder_celt * self = state->inst; |
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[2197] | 109 | register int ret = self->frame_size * _16BIT * state->info.pcm.channels; |
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[2191] | 110 | |
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[2197] | 111 | ROAR_DBG("roar_xcoder_celt_packet_size(state=%p, samples=%i) = %i", state, samples, ret); |
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| 112 | |
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| 113 | return ret; |
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[2188] | 114 | } |
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| 115 | |
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| 116 | int roar_xcoder_celt_encode (struct roar_xcoder * state, void * buf, size_t len) { |
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[2191] | 117 | struct roar_xcoder_celt * self = state->inst; |
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[2199] | 118 | uint16_t * lenp = self->iobuffer; |
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| 119 | void * cp = self->iobuffer + _SIZE_LEN; |
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[2201] | 120 | uint16_t pkglen; |
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[2191] | 121 | |
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[2197] | 122 | ROAR_DBG("roar_xcoder_celt_encode(*): test if we are in encoding mode..."); |
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| 123 | |
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[2191] | 124 | if (!state->encode) |
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| 125 | return -1; |
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| 126 | |
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[2197] | 127 | ROAR_DBG("roar_xcoder_celt_encode(*): Encoding..."); |
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| 128 | |
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[2193] | 129 | if ( state->stage == ROAR_XCODER_STAGE_INITED ) { |
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[2192] | 130 | if ( roar_vio_write(state->backend, ROAR_CELT_MAGIC, ROAR_CELT_MAGIC_LEN) != ROAR_CELT_MAGIC_LEN ) |
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| 131 | return -1; |
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| 132 | state->stage = ROAR_XCODER_STAGE_MAGIC; |
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[2197] | 133 | ROAR_DBG("roar_xcoder_celt_encode(*): Wrote MAGIC"); |
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[2192] | 134 | } |
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| 135 | |
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[2201] | 136 | pkglen = celt_encode(self->encoder, (celt_int16_t *) buf, NULL, cp, self->bufferlen - _SIZE_LEN); |
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| 137 | *lenp = ROAR_HOST2NET16(pkglen); |
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| 138 | |
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| 139 | if ( roar_vio_write(state->backend, self->iobuffer, pkglen+2) == -1 ) |
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| 140 | return -1; |
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| 141 | |
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| 142 | return 0; |
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[2188] | 143 | } |
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| 144 | |
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| 145 | int roar_xcoder_celt_decode (struct roar_xcoder * state, void * buf, size_t len) { |
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[2191] | 146 | struct roar_xcoder_celt * self = state->inst; |
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[2203] | 147 | uint16_t * lenp = self->iobuffer; |
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| 148 | void * cp = self->iobuffer + _SIZE_LEN; |
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| 149 | uint16_t pkglen; |
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| 150 | char magic[ROAR_CELT_MAGIC_LEN]; |
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[2191] | 151 | |
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[2197] | 152 | ROAR_DBG("roar_xcoder_celt_decode(*): test if we are in decoding mode..."); |
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| 153 | |
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[2191] | 154 | if (state->encode) |
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| 155 | return -1; |
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| 156 | |
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[2203] | 157 | if ( state->stage == ROAR_XCODER_STAGE_INITED ) { |
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| 158 | if ( roar_vio_read(state->backend, magic, ROAR_CELT_MAGIC_LEN) != ROAR_CELT_MAGIC_LEN ) |
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| 159 | return -1; |
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| 160 | |
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| 161 | if ( memcmp(magic, ROAR_CELT_MAGIC, ROAR_CELT_MAGIC_LEN) != 0 ) |
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| 162 | return -1; |
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| 163 | |
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| 164 | state->stage = ROAR_XCODER_STAGE_MAGIC; |
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| 165 | ROAR_DBG("roar_xcoder_celt_decode(*): Found valid Magic"); |
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| 166 | } |
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| 167 | |
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| 168 | if ( roar_vio_read(state->backend, lenp, _SIZE_LEN) != _SIZE_LEN ) |
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| 169 | return -1; |
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| 170 | |
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| 171 | pkglen = ROAR_NET2HOST16(*lenp); |
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| 172 | |
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| 173 | if ( pkglen > (self->bufferlen - _SIZE_LEN) ) |
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| 174 | return -1; |
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| 175 | |
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| 176 | if ( roar_vio_read(state->backend, cp, pkglen) != pkglen ) |
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| 177 | return -1; |
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| 178 | |
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| 179 | if ( celt_decode(self->decoder, cp, pkglen, (celt_int16_t *) buf) < 0 ) |
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| 180 | return -1; |
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| 181 | |
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| 182 | return 0; |
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[2188] | 183 | } |
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[2187] | 184 | |
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| 185 | #endif |
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| 186 | |
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| 187 | //ll |
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