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author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-04-13 17:34:20 +0000 |
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committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-04-13 17:34:20 +0000 |
commit | dac494eff8b924afabdc2ffbd93b1ab2ac1b8a4f (patch) | |
tree | 8a574273a48e2e1379ba648d3aa4da1a958ac136 /adpcm.c | |
parent | 842b44dcd92a92d2156b329377137b44959c0188 (diff) | |
download | mpv-dac494eff8b924afabdc2ffbd93b1ab2ac1b8a4f.tar.bz2 mpv-dac494eff8b924afabdc2ffbd93b1ab2ac1b8a4f.tar.xz |
unused files
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5601 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'adpcm.c')
-rw-r--r-- | adpcm.c | 505 |
1 files changed, 0 insertions, 505 deletions
diff --git a/adpcm.c b/adpcm.c deleted file mode 100644 index c48afddc21..0000000000 --- a/adpcm.c +++ /dev/null @@ -1,505 +0,0 @@ -/* - Unified ADPCM Decoder for MPlayer - - This file is in charge of decoding all of the various ADPCM data - formats that various entities have created. Details about the data - formats can be found here: - http://www.pcisys.net/~melanson/codecs/ - - (C) 2001 Mike Melanson -*/ - -#if 0 -#include "config.h" -#include "bswap.h" -#include "adpcm.h" -#include "mp_msg.h" - -#define BE_16(x) (be2me_16(*(unsigned short *)(x))) -#define BE_32(x) (be2me_32(*(unsigned int *)(x))) -#define LE_16(x) (le2me_16(*(unsigned short *)(x))) -#define LE_32(x) (le2me_32(*(unsigned int *)(x))) - -// 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 ms_adapt_table[] = -{ - 230, 230, 230, 230, 307, 409, 512, 614, - 768, 614, 512, 409, 307, 230, 230, 230 -}; - -static int ms_adapt_coeff1[] = -{ - 256, 512, 0, 192, 240, 460, 392 -}; - -static int ms_adapt_coeff2[] = -{ - 0, -256, 0, 64, 0, -208, -232 -}; - -// 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; - -void decode_nibbles(unsigned short *output, - int output_size, int channels, - int predictor_l, int index_l, - int predictor_r, int index_r) -{ - int step[2]; - int predictor[2]; - int index[2]; - int diff; - int i; - int sign; - int delta; - int channel_number = 0; - - step[0] = adpcm_step[index_l]; - step[1] = adpcm_step[index_r]; - predictor[0] = predictor_l; - predictor[1] = predictor_r; - index[0] = index_l; - index[1] = index_r; - - for (i = 0; i < output_size; i++) - { - delta = output[i]; - - index[channel_number] += adpcm_index[delta]; - CLAMP_0_TO_88(index[channel_number]); - - sign = delta & 8; - delta = delta & 7; - - diff = step[channel_number] >> 3; - if (delta & 4) diff += step[channel_number]; - if (delta & 2) diff += step[channel_number] >> 1; - if (delta & 1) diff += step[channel_number] >> 2; - - if (sign) - predictor[channel_number] -= diff; - else - predictor[channel_number] += diff; - - CLAMP_S16(predictor[channel_number]); - output[i] = predictor[channel_number]; - step[channel_number] = adpcm_step[index[channel_number]]; - - // toggle channel - channel_number ^= channels - 1; - - } -} - -int qt_ima_adpcm_decode_block(unsigned short *output, unsigned char *input, - int channels) -{ - int initial_predictor_l = 0; - int initial_predictor_r = 0; - int initial_index_l = 0; - int initial_index_r = 0; - int i; - - initial_predictor_l = BE_16(&input[0]); - initial_index_l = initial_predictor_l; - - // mask, sign-extend, and clamp the predictor portion - initial_predictor_l &= 0xFF80; - SE_16BIT(initial_predictor_l); - CLAMP_S16(initial_predictor_l); - - // mask and clamp the index portion - initial_index_l &= 0x7F; - CLAMP_0_TO_88(initial_index_l); - - // handle stereo - if (channels > 1) - { - initial_predictor_r = BE_16(&input[IMA_ADPCM_BLOCK_SIZE]); - initial_index_r = initial_predictor_r; - - // mask, sign-extend, and clamp the predictor portion - initial_predictor_r &= 0xFF80; - SE_16BIT(initial_predictor_r); - CLAMP_S16(initial_predictor_r); - - // mask and clamp the index portion - initial_index_r &= 0x7F; - CLAMP_0_TO_88(initial_index_r); - } - - // break apart all of the nibbles in the block - if (channels == 1) - for (i = 0; i < IMA_ADPCM_SAMPLES_PER_BLOCK / 2; i++) - { - output[i * 2 + 0] = input[2 + i] & 0x0F; - output[i * 2 + 1] = input[2 + i] >> 4; - } - else - for (i = 0; i < IMA_ADPCM_SAMPLES_PER_BLOCK / 2 * 2; i++) - { - output[i * 4 + 0] = input[2 + i] & 0x0F; - output[i * 4 + 1] = input[2 + IMA_ADPCM_BLOCK_SIZE + i] & 0x0F; - output[i * 4 + 2] = input[2 + i] >> 4; - output[i * 4 + 3] = input[2 + IMA_ADPCM_BLOCK_SIZE + i] >> 4; - } - - decode_nibbles(output, - IMA_ADPCM_SAMPLES_PER_BLOCK * channels, channels, - initial_predictor_l, initial_index_l, - initial_predictor_r, initial_index_r); - - return IMA_ADPCM_SAMPLES_PER_BLOCK * channels; -} - -int ms_ima_adpcm_decode_block(unsigned short *output, unsigned char *input, - int channels, int block_size) -{ - int initial_predictor_l = 0; - int initial_predictor_r = 0; - int initial_index_l = 0; - int initial_index_r = 0; - int i; - - initial_predictor_l = BE_16(&input[0]); - initial_index_l = initial_predictor_l; - - // mask, sign-extend, and clamp the predictor portion - initial_predictor_l &= 0xFF80; - SE_16BIT(initial_predictor_l); - CLAMP_S16(initial_predictor_l); - - // mask and clamp the index portion - initial_index_l &= 0x7F; - CLAMP_0_TO_88(initial_index_l); - - // handle stereo - if (channels > 1) - { - initial_predictor_r = BE_16(&input[IMA_ADPCM_BLOCK_SIZE]); - initial_index_r = initial_predictor_r; - - // mask, sign-extend, and clamp the predictor portion - initial_predictor_r &= 0xFF80; - SE_16BIT(initial_predictor_r); - CLAMP_S16(initial_predictor_r); - - // mask and clamp the index portion - initial_index_r &= 0x7F; - CLAMP_0_TO_88(initial_index_r); - } - - // break apart all of the nibbles in the block - if (channels == 1) - for (i = 0; i < IMA_ADPCM_SAMPLES_PER_BLOCK / 2; i++) - { - output[i * 2 + 0] = input[2 + i] & 0x0F; - output[i * 2 + 1] = input[2 + i] >> 4; - } - else - for (i = 0; i < IMA_ADPCM_SAMPLES_PER_BLOCK / 2 * 2; i++) - { - output[i * 4 + 0] = input[2 + i] & 0x0F; - output[i * 4 + 1] = input[2 + IMA_ADPCM_BLOCK_SIZE + i] & 0x0F; - output[i * 4 + 2] = input[2 + i] >> 4; - output[i * 4 + 3] = input[2 + IMA_ADPCM_BLOCK_SIZE + i] >> 4; - } - - decode_nibbles(output, - IMA_ADPCM_SAMPLES_PER_BLOCK * channels, channels, - initial_predictor_l, initial_index_l, - initial_predictor_r, initial_index_r); - - return IMA_ADPCM_SAMPLES_PER_BLOCK * channels; -} - -int ms_adpcm_decode_block(unsigned short *output, unsigned char *input, - int channels, int block_size) -{ - int current_channel = 0; - int idelta[2]; - int sample1[2]; - int sample2[2]; - int coeff1[2]; - int coeff2[2]; - int stream_ptr = 0; - int out_ptr = 0; - int upper_nibble = 1; - int nibble; - int snibble; // signed nibble - int predictor; - - // fetch the header information, in stereo if both channels are present - if (input[stream_ptr] > 6) - mp_msg(MSGT_DECAUDIO, MSGL_WARN, - "MS ADPCM: coefficient (%d) out of range (should be [0..6])\n", - input[stream_ptr]); - coeff1[0] = ms_adapt_coeff1[input[stream_ptr]]; - coeff2[0] = ms_adapt_coeff2[input[stream_ptr]]; - stream_ptr++; - if (channels == 2) - { - if (input[stream_ptr] > 6) - mp_msg(MSGT_DECAUDIO, MSGL_WARN, - "MS ADPCM: coefficient (%d) out of range (should be [0..6])\n", - input[stream_ptr]); - coeff1[1] = ms_adapt_coeff1[input[stream_ptr]]; - coeff2[1] = ms_adapt_coeff2[input[stream_ptr]]; - stream_ptr++; - } - - idelta[0] = LE_16(&input[stream_ptr]); - stream_ptr += 2; - SE_16BIT(idelta[0]); - if (channels == 2) - { - idelta[1] = LE_16(&input[stream_ptr]); - stream_ptr += 2; - SE_16BIT(idelta[1]); - } - - sample1[0] = LE_16(&input[stream_ptr]); - stream_ptr += 2; - SE_16BIT(sample1[0]); - if (channels == 2) - { - sample1[1] = LE_16(&input[stream_ptr]); - stream_ptr += 2; - SE_16BIT(sample1[1]); - } - - sample2[0] = LE_16(&input[stream_ptr]); - stream_ptr += 2; - SE_16BIT(sample2[0]); - if (channels == 2) - { - sample2[1] = LE_16(&input[stream_ptr]); - stream_ptr += 2; - SE_16BIT(sample2[1]); - } - - while (stream_ptr < block_size) - { - // get the next nibble - if (upper_nibble) - nibble = snibble = input[stream_ptr] >> 4; - else - nibble = snibble = input[stream_ptr++] & 0x0F; - upper_nibble ^= 1; - SE_4BIT(snibble); - - predictor = ( - ((sample1[current_channel] * coeff1[current_channel]) + - (sample2[current_channel] * coeff2[current_channel])) / 256) + - (snibble * idelta[current_channel]); - CLAMP_S16(predictor); - sample2[current_channel] = sample1[current_channel]; - sample1[current_channel] = predictor; - output[out_ptr++] = predictor; - - // compute the next adaptive scale factor (a.k.a. the variable idelta) - idelta[current_channel] = - (ms_adapt_table[nibble] * idelta[current_channel]) / 256; - CLAMP_ABOVE_16(idelta[current_channel]); - - // toggle the channel - current_channel ^= channels - 1; - } - - return (block_size - (MS_ADPCM_PREAMBLE_SIZE * channels)) * 2; -} - -int dk4_adpcm_decode_block(unsigned short *output, unsigned char *input, - int channels, int block_size) -{ - int i; - int output_ptr; - int predictor_l = 0; - int predictor_r = 0; - int index_l = 0; - int index_r = 0; - - // the first predictor value goes straight to the output - predictor_l = output[0] = LE_16(&input[0]); - SE_16BIT(predictor_l); - index_l = input[2]; - if (channels == 2) - { - predictor_r = output[1] = LE_16(&input[4]); - SE_16BIT(predictor_r); - index_r = input[6]; - } - - output_ptr = channels; - for (i = DK4_ADPCM_PREAMBLE_SIZE * channels; i < block_size; i++) - { - output[output_ptr++] = input[i] >> 4; - output[output_ptr++] = input[i] & 0x0F; - } - - decode_nibbles(&output[channels], - (block_size - DK4_ADPCM_PREAMBLE_SIZE * channels) * 2 - channels, - channels, - predictor_l, index_l, - predictor_r, index_r); - - return (block_size - DK4_ADPCM_PREAMBLE_SIZE * channels) * 2 - channels; -} - -#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 -int dk3_adpcm_decode_block(unsigned short *output, unsigned char *input) -{ - 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 = LE_16(&input[10]); - diff_pred = LE_16(&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 < 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; -} -#endif - |