diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/ws-snd1.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/ws-snd1.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/contrib/ffmpeg/libavcodec/ws-snd1.c b/contrib/ffmpeg/libavcodec/ws-snd1.c deleted file mode 100644 index 3624909a3..000000000 --- a/contrib/ffmpeg/libavcodec/ws-snd1.c +++ /dev/null @@ -1,144 +0,0 @@ -/* - * Westwood SNDx codecs - * Copyright (c) 2005 Konstantin Shishkov - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "avcodec.h" - -/** - * @file ws-snd.c - * Westwood SNDx codecs. - * - * Reference documents about VQA format and its audio codecs - * can be found here: - * http://www.multimedia.cx - */ - -static const char ws_adpcm_2bit[] = { -2, -1, 0, 1}; -static const char ws_adpcm_4bit[] = { - -9, -8, -6, -5, -4, -3, -2, -1, - 0, 1, 2, 3, 4, 5, 6, 8 }; - -#define CLIP8(a) if(a>127)a=127;if(a<-128)a=-128; - -static int ws_snd_decode_init(AVCodecContext * avctx) -{ -// WSSNDContext *c = avctx->priv_data; - - return 0; -} - -static int ws_snd_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ -// WSSNDContext *c = avctx->priv_data; - - int in_size, out_size; - int sample = 0; - int i; - short *samples = data; - - if (!buf_size) - return 0; - - out_size = AV_RL16(&buf[0]); - *data_size = out_size * 2; - in_size = AV_RL16(&buf[2]); - buf += 4; - - if (in_size == out_size) { - for (i = 0; i < out_size; i++) - *samples++ = (*buf++ - 0x80) << 8; - return buf_size; - } - - while (out_size > 0) { - int code; - uint8_t count; - code = (*buf) >> 6; - count = (*buf) & 0x3F; - buf++; - switch(code) { - case 0: /* ADPCM 2-bit */ - for (count++; count > 0; count--) { - code = *buf++; - sample += ws_adpcm_2bit[code & 0x3]; - CLIP8(sample); - *samples++ = sample << 8; - sample += ws_adpcm_2bit[(code >> 2) & 0x3]; - CLIP8(sample); - *samples++ = sample << 8; - sample += ws_adpcm_2bit[(code >> 4) & 0x3]; - CLIP8(sample); - *samples++ = sample << 8; - sample += ws_adpcm_2bit[(code >> 6) & 0x3]; - CLIP8(sample); - *samples++ = sample << 8; - out_size -= 4; - } - break; - case 1: /* ADPCM 4-bit */ - for (count++; count > 0; count--) { - code = *buf++; - sample += ws_adpcm_4bit[code & 0xF]; - CLIP8(sample); - *samples++ = sample << 8; - sample += ws_adpcm_4bit[code >> 4]; - CLIP8(sample); - *samples++ = sample << 8; - out_size -= 2; - } - break; - case 2: /* no compression */ - if (count & 0x20) { /* big delta */ - char t; - t = count; - t <<= 3; - sample += t >> 3; - *samples++ = sample << 8; - out_size--; - } else { /* copy */ - for (count++; count > 0; count--) { - *samples++ = (*buf++ - 0x80) << 8; - out_size--; - } - sample = buf[-1] - 0x80; - } - break; - default: /* run */ - for(count++; count > 0; count--) { - *samples++ = sample << 8; - out_size--; - } - } - } - - return buf_size; -} - -AVCodec ws_snd1_decoder = { - "ws_snd1", - CODEC_TYPE_AUDIO, - CODEC_ID_WESTWOOD_SND1, - 0, - ws_snd_decode_init, - NULL, - NULL, - ws_snd_decode_frame, -}; |