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-rw-r--r--libmpcodecs/ad_dk3adpcm.c262
1 files changed, 0 insertions, 262 deletions
diff --git a/libmpcodecs/ad_dk3adpcm.c b/libmpcodecs/ad_dk3adpcm.c
deleted file mode 100644
index 15027f88b1..0000000000
--- a/libmpcodecs/ad_dk3adpcm.c
+++ /dev/null
@@ -1,262 +0,0 @@
-/*
- * DK3 ADPCM decoder
- *
- * "This format number was used by Duck Corp. but not officially
- * registered with Microsoft"
- *
- * This file is responsible for decoding audio data encoded with
- * Duck Corp's DK3 ADPCM algorithm. Details about the data format
- * can be found here:
- * http://www.pcisys.net/~melanson/codecs/
- *
- * Copyright (c) 2002 Mike Melanson
- *
- * This file is part of MPlayer.
- *
- * MPlayer is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * MPlayer 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with MPlayer; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <libavutil/intreadwrite.h>
-
-#include "config.h"
-#include "ad_internal.h"
-
-static const ad_info_t info =
-{
- "Duck Corp. DK3 ADPCM decoder",
- "dk3adpcm",
- "Nick Kurshev",
- "Mike Melanson",
- ""
-};
-
-LIBAD_EXTERN(dk3adpcm)
-
-#define DK3_ADPCM_PREAMBLE_SIZE 16
-
-// useful macros
-// clamp a number between 0 and 88
-#define CLAMP_0_TO_88(x) if (x < 0) x = 0; else if (x > 88) x = 88;
-// clamp a number within a signed 16-bit range
-#define CLAMP_S16(x) if (x < -32768) x = -32768; \
- else if (x > 32767) x = 32767;
-// clamp a number above 16
-#define CLAMP_ABOVE_16(x) if (x < 16) x = 16;
-// sign extend a 16-bit value
-#define SE_16BIT(x) if (x & 0x8000) x -= 0x10000;
-// sign extend a 4-bit value
-#define SE_4BIT(x) if (x & 0x8) x -= 0x10;
-
-// pertinent tables
-static int adpcm_step[89] =
-{
- 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
- 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
- 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
- 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
- 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
- 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
- 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
- 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
- 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
-};
-
-static int adpcm_index[16] =
-{
- -1, -1, -1, -1, 2, 4, 6, 8,
- -1, -1, -1, -1, 2, 4, 6, 8
-};
-
-static int preinit(sh_audio_t *sh_audio)
-{
- sh_audio->audio_out_minsize = sh_audio->wf->nBlockAlign * 6;
- sh_audio->ds->ss_div =
- (sh_audio->wf->nBlockAlign - DK3_ADPCM_PREAMBLE_SIZE) * 8 / 3;
- sh_audio->audio_in_minsize=
- sh_audio->ds->ss_mul = sh_audio->wf->nBlockAlign;
- return 1;
-}
-
-static int init(sh_audio_t *sh_audio)
-{
- sh_audio->channels = sh_audio->wf->nChannels;
- sh_audio->samplerate = sh_audio->wf->nSamplesPerSec;
- sh_audio->i_bps =
- (sh_audio->ds->ss_mul * sh_audio->samplerate) / sh_audio->ds->ss_div;
- sh_audio->samplesize=2;
- return 1;
-}
-
-static void uninit(sh_audio_t *sh_audio)
-{
-}
-
-static int control(sh_audio_t *sh_audio,int cmd,void* arg, ...)
-{
- if(cmd==ADCTRL_SKIP_FRAME){
- demux_read_data(sh_audio->ds, sh_audio->a_in_buffer,sh_audio->ds->ss_mul);
- return CONTROL_TRUE;
- }
- return CONTROL_UNKNOWN;
-}
-
-#define DK3_GET_NEXT_NIBBLE() \
- if (decode_top_nibble_next) \
- { \
- nibble = (last_byte >> 4) & 0x0F; \
- decode_top_nibble_next = 0; \
- } \
- else \
- { \
- last_byte = input[in_ptr++]; \
- nibble = last_byte & 0x0F; \
- decode_top_nibble_next = 1; \
- }
-
-// note: This decoder assumes the format 0x62 data always comes in
-// stereo flavor
-static int dk3_adpcm_decode_block(unsigned short *output, unsigned char *input,
- int block_size)
-{
- int sum_pred;
- int diff_pred;
- int sum_index;
- int diff_index;
- int diff_channel;
- int in_ptr = 0x10;
- int out_ptr = 0;
-
- unsigned char last_byte = 0;
- unsigned char nibble;
- int decode_top_nibble_next = 0;
-
- // ADPCM work variables
- int sign;
- int delta;
- int step;
- int diff;
-
- sum_pred = AV_RL16(&input[10]);
- diff_pred = AV_RL16(&input[12]);
- SE_16BIT(sum_pred);
- SE_16BIT(diff_pred);
- diff_channel = diff_pred;
- sum_index = input[14];
- diff_index = input[15];
-
- while (in_ptr < block_size - !decode_top_nibble_next)
-// while (in_ptr < 2048)
- {
- // process the first predictor of the sum channel
- DK3_GET_NEXT_NIBBLE();
-
- step = adpcm_step[sum_index];
-
- sign = nibble & 8;
- delta = nibble & 7;
-
- diff = step >> 3;
- if (delta & 4) diff += step;
- if (delta & 2) diff += step >> 1;
- if (delta & 1) diff += step >> 2;
-
- if (sign)
- sum_pred -= diff;
- else
- sum_pred += diff;
-
- CLAMP_S16(sum_pred);
-
- sum_index += adpcm_index[nibble];
- CLAMP_0_TO_88(sum_index);
-
- // process the diff channel predictor
- DK3_GET_NEXT_NIBBLE();
-
- step = adpcm_step[diff_index];
-
- sign = nibble & 8;
- delta = nibble & 7;
-
- diff = step >> 3;
- if (delta & 4) diff += step;
- if (delta & 2) diff += step >> 1;
- if (delta & 1) diff += step >> 2;
-
- if (sign)
- diff_pred -= diff;
- else
- diff_pred += diff;
-
- CLAMP_S16(diff_pred);
-
- diff_index += adpcm_index[nibble];
- CLAMP_0_TO_88(diff_index);
-
- // output the first pair of stereo PCM samples
- diff_channel = (diff_channel + diff_pred) / 2;
- output[out_ptr++] = sum_pred + diff_channel;
- output[out_ptr++] = sum_pred - diff_channel;
-
- // process the second predictor of the sum channel
- DK3_GET_NEXT_NIBBLE();
-
- step = adpcm_step[sum_index];
-
- sign = nibble & 8;
- delta = nibble & 7;
-
- diff = step >> 3;
- if (delta & 4) diff += step;
- if (delta & 2) diff += step >> 1;
- if (delta & 1) diff += step >> 2;
-
- if (sign)
- sum_pred -= diff;
- else
- sum_pred += diff;
-
- CLAMP_S16(sum_pred);
-
- sum_index += adpcm_index[nibble];
- CLAMP_0_TO_88(sum_index);
-
- // output the second pair of stereo PCM samples
- output[out_ptr++] = sum_pred + diff_channel;
- output[out_ptr++] = sum_pred - diff_channel;
- }
-
- return out_ptr;
-}
-
-static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
-{
- if (demux_read_data(sh_audio->ds, sh_audio->a_in_buffer,
- sh_audio->ds->ss_mul) !=
- sh_audio->ds->ss_mul)
- return -1; /* EOF */
-
- if (maxlen < 2 * 4 * sh_audio->wf->nBlockAlign * 2 / 3) {
- mp_msg(MSGT_DECAUDIO, MSGL_V, "dk3adpcm: maxlen too small in decode_audio\n");
- return -1;
- }
- return 2 * dk3_adpcm_decode_block(
- (unsigned short*)buf, sh_audio->a_in_buffer,
- sh_audio->ds->ss_mul);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-03 13:25:45 +0000