diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/mpc8.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/mpc8.c | 364 |
1 files changed, 0 insertions, 364 deletions
diff --git a/contrib/ffmpeg/libavcodec/mpc8.c b/contrib/ffmpeg/libavcodec/mpc8.c deleted file mode 100644 index 3dfa5c9f3..000000000 --- a/contrib/ffmpeg/libavcodec/mpc8.c +++ /dev/null @@ -1,364 +0,0 @@ -/* - * Musepack SV8 decoder - * Copyright (c) 2007 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 - */ - -/** - * @file mpc8.c Musepack SV8 decoder - * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples - * divided into 32 subbands. - */ - -#include "avcodec.h" -#include "bitstream.h" -#include "dsputil.h" -#include "random.h" - -#ifdef CONFIG_MPEGAUDIO_HP -#define USE_HIGHPRECISION -#endif -#include "mpegaudio.h" - -#include "mpc.h" -#include "mpcdata.h" -#include "mpc8data.h" -#include "mpc8huff.h" - -static VLC band_vlc, scfi_vlc[2], dscf_vlc[2], res_vlc[2]; -static VLC q1_vlc, q2_vlc[2], q3_vlc[2], quant_vlc[4][2], q9up_vlc; - -static const int q3_offsets[2] = { MPC8_Q3_OFFSET, MPC8_Q4_OFFSET }; -static const int quant_offsets[6] = { MPC8_Q5_OFFSET, MPC8_Q6_OFFSET, MPC8_Q7_OFFSET, MPC8_Q8_OFFSET }; - -static inline int mpc8_dec_base(GetBitContext *gb, int k, int n) -{ - int code = get_bits(gb, mpc8_cnk_len[k-1][n-1] - 1); - - if (code >= mpc8_cnk_lost[k-1][n-1]) - code = ((code << 1) | get_bits1(gb)) - mpc8_cnk_lost[k-1][n-1]; - - return code; -} - -static inline int mpc8_dec_enum(GetBitContext *gb, int k, int n) -{ - int bits = 0; - const uint32_t * C = mpc8_cnk[k-1]; - int code = mpc8_dec_base(gb, k, n); - - do { - n--; - if (code >= C[n]) { - bits |= 1 << n; - code -= C[n]; - C -= 32; - k--; - } - } while(k > 0); - - return bits; -} - -static inline int mpc8_get_mod_golomb(GetBitContext *gb, int m) -{ - if(mpc8_cnk_len[0][m] < 1) return 0; - return mpc8_dec_base(gb, 1, m+1); -} - -static int mpc8_get_mask(GetBitContext *gb, int size, int t) -{ - int mask = 0; - - if(t && t != size) - mask = mpc8_dec_enum(gb, FFMIN(t, size - t), size); - if((t << 1) > size) mask = ~mask; - - return mask; -} - -static int mpc8_decode_init(AVCodecContext * avctx) -{ - int i; - MPCContext *c = avctx->priv_data; - GetBitContext gb; - static int vlc_initialized = 0; - - if(avctx->extradata_size < 2){ - av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size); - return -1; - } - memset(c->oldDSCF, 0, sizeof(c->oldDSCF)); - av_init_random(0xDEADBEEF, &c->rnd); - dsputil_init(&c->dsp, avctx); - - ff_mpc_init(); - - init_get_bits(&gb, avctx->extradata, 16); - - skip_bits(&gb, 3);//sample rate - c->maxbands = get_bits(&gb, 5) + 1; - skip_bits(&gb, 4);//channels - c->MSS = get_bits1(&gb); - c->frames = 1 << (get_bits(&gb, 3) * 2); - - if(vlc_initialized) return 0; - av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n"); - - init_vlc(&band_vlc, MPC8_BANDS_BITS, MPC8_BANDS_SIZE, - mpc8_bands_bits, 1, 1, - mpc8_bands_codes, 1, 1, INIT_VLC_USE_STATIC); - - init_vlc(&q1_vlc, MPC8_Q1_BITS, MPC8_Q1_SIZE, - mpc8_q1_bits, 1, 1, - mpc8_q1_codes, 1, 1, INIT_VLC_USE_STATIC); - init_vlc(&q9up_vlc, MPC8_Q9UP_BITS, MPC8_Q9UP_SIZE, - mpc8_q9up_bits, 1, 1, - mpc8_q9up_codes, 1, 1, INIT_VLC_USE_STATIC); - - init_vlc(&scfi_vlc[0], MPC8_SCFI0_BITS, MPC8_SCFI0_SIZE, - mpc8_scfi0_bits, 1, 1, - mpc8_scfi0_codes, 1, 1, INIT_VLC_USE_STATIC); - init_vlc(&scfi_vlc[1], MPC8_SCFI1_BITS, MPC8_SCFI1_SIZE, - mpc8_scfi1_bits, 1, 1, - mpc8_scfi1_codes, 1, 1, INIT_VLC_USE_STATIC); - - init_vlc(&dscf_vlc[0], MPC8_DSCF0_BITS, MPC8_DSCF0_SIZE, - mpc8_dscf0_bits, 1, 1, - mpc8_dscf0_codes, 1, 1, INIT_VLC_USE_STATIC); - init_vlc(&dscf_vlc[1], MPC8_DSCF1_BITS, MPC8_DSCF1_SIZE, - mpc8_dscf1_bits, 1, 1, - mpc8_dscf1_codes, 1, 1, INIT_VLC_USE_STATIC); - - init_vlc_sparse(&q3_vlc[0], MPC8_Q3_BITS, MPC8_Q3_SIZE, - mpc8_q3_bits, 1, 1, - mpc8_q3_codes, 1, 1, - mpc8_q3_syms, 1, 1, INIT_VLC_USE_STATIC); - init_vlc_sparse(&q3_vlc[1], MPC8_Q4_BITS, MPC8_Q4_SIZE, - mpc8_q4_bits, 1, 1, - mpc8_q4_codes, 1, 1, - mpc8_q4_syms, 1, 1, INIT_VLC_USE_STATIC); - - for(i = 0; i < 2; i++){ - init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE, - &mpc8_res_bits[i], 1, 1, - &mpc8_res_codes[i], 1, 1, INIT_VLC_USE_STATIC); - - init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE, - &mpc8_q2_bits[i], 1, 1, - &mpc8_q2_codes[i], 1, 1, INIT_VLC_USE_STATIC); - - init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE, - &mpc8_q5_bits[i], 1, 1, - &mpc8_q5_codes[i], 1, 1, INIT_VLC_USE_STATIC); - init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE, - &mpc8_q6_bits[i], 1, 1, - &mpc8_q6_codes[i], 1, 1, INIT_VLC_USE_STATIC); - init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE, - &mpc8_q7_bits[i], 1, 1, - &mpc8_q7_codes[i], 1, 1, INIT_VLC_USE_STATIC); - init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE, - &mpc8_q8_bits[i], 1, 1, - &mpc8_q8_codes[i], 1, 1, INIT_VLC_USE_STATIC); - } - vlc_initialized = 1; - return 0; -} - -static int mpc8_decode_frame(AVCodecContext * avctx, - void *data, int *data_size, - const uint8_t * buf, int buf_size) -{ - MPCContext *c = avctx->priv_data; - GetBitContext gb2, *gb = &gb2; - int i, j, k, ch, cnt, res, t; - Band *bands = c->bands; - int off; - int maxband, keyframe; - int last[2]; - - keyframe = c->cur_frame == 0; - - if(keyframe){ - memset(c->Q, 0, sizeof(c->Q)); - c->last_bits_used = 0; - } - init_get_bits(gb, buf, buf_size * 8); - skip_bits(gb, c->last_bits_used & 7); - - if(keyframe) - maxband = mpc8_get_mod_golomb(gb, c->maxbands + 1); - else{ - maxband = c->last_max_band + get_vlc2(gb, band_vlc.table, MPC8_BANDS_BITS, 2); - if(maxband > 32) maxband -= 33; - } - c->last_max_band = maxband; - - /* read subband indexes */ - if(maxband){ - last[0] = last[1] = 0; - for(i = maxband - 1; i >= 0; i--){ - for(ch = 0; ch < 2; ch++){ - last[ch] = get_vlc2(gb, res_vlc[last[ch] > 2].table, MPC8_RES_BITS, 2) + last[ch]; - if(last[ch] > 15) last[ch] -= 17; - bands[i].res[ch] = last[ch]; - } - } - if(c->MSS){ - int mask; - - cnt = 0; - for(i = 0; i < maxband; i++) - if(bands[i].res[0] || bands[i].res[1]) - cnt++; - t = mpc8_get_mod_golomb(gb, cnt); - mask = mpc8_get_mask(gb, cnt, t); - for(i = maxband - 1; i >= 0; i--) - if(bands[i].res[0] || bands[i].res[1]){ - bands[i].msf = mask & 1; - mask >>= 1; - } - } - } - for(i = maxband; i < c->maxbands; i++) - bands[i].res[0] = bands[i].res[1] = 0; - - if(keyframe){ - for(i = 0; i < 32; i++) - c->oldDSCF[0][i] = c->oldDSCF[1][i] = 1; - } - - for(i = 0; i < maxband; i++){ - if(bands[i].res[0] || bands[i].res[1]){ - cnt = !!bands[i].res[0] + !!bands[i].res[1] - 1; - if(cnt >= 0){ - t = get_vlc2(gb, scfi_vlc[cnt].table, scfi_vlc[cnt].bits, 1); - if(bands[i].res[0]) bands[i].scfi[0] = t >> (2 * cnt); - if(bands[i].res[1]) bands[i].scfi[1] = t & 3; - } - } - } - - for(i = 0; i < maxband; i++){ - for(ch = 0; ch < 2; ch++){ - if(!bands[i].res[ch]) continue; - - if(c->oldDSCF[ch][i]){ - bands[i].scf_idx[ch][0] = get_bits(gb, 7) - 6; - c->oldDSCF[ch][i] = 0; - }else{ - t = get_vlc2(gb, dscf_vlc[1].table, MPC8_DSCF1_BITS, 2); - if(t == 64) - t += get_bits(gb, 6); - bands[i].scf_idx[ch][0] = ((bands[i].scf_idx[ch][2] + t - 25) & 0x7F) - 6; - } - for(j = 0; j < 2; j++){ - if((bands[i].scfi[ch] << j) & 2) - bands[i].scf_idx[ch][j + 1] = bands[i].scf_idx[ch][j]; - else{ - t = get_vlc2(gb, dscf_vlc[0].table, MPC8_DSCF0_BITS, 2); - if(t == 31) - t = 64 + get_bits(gb, 6); - bands[i].scf_idx[ch][j + 1] = ((bands[i].scf_idx[ch][j] + t - 25) & 0x7F) - 6; - } - } - } - } - - for(i = 0, off = 0; i < maxband; i++, off += SAMPLES_PER_BAND){ - for(ch = 0; ch < 2; ch++){ - res = bands[i].res[ch]; - switch(res){ - case -1: - for(j = 0; j < SAMPLES_PER_BAND; j++) - c->Q[ch][off + j] = (av_random(&c->rnd) & 0x3FC) - 510; - break; - case 0: - break; - case 1: - for(j = 0; j < SAMPLES_PER_BAND; j += SAMPLES_PER_BAND / 2){ - cnt = get_vlc2(gb, q1_vlc.table, MPC8_Q1_BITS, 2); - t = mpc8_get_mask(gb, 18, cnt); - for(k = 0; k < SAMPLES_PER_BAND / 2; k++, t <<= 1) - c->Q[ch][off + j + k] = (t & 0x20000) ? (get_bits1(gb) << 1) - 1 : 0; - } - break; - case 2: - cnt = 6;//2*mpc8_thres[res] - for(j = 0; j < SAMPLES_PER_BAND; j += 3){ - t = get_vlc2(gb, q2_vlc[cnt > 3].table, MPC8_Q2_BITS, 2); - c->Q[ch][off + j + 0] = mpc8_idx50[t]; - c->Q[ch][off + j + 1] = mpc8_idx51[t]; - c->Q[ch][off + j + 2] = mpc8_idx52[t]; - cnt = (cnt >> 1) + mpc8_huffq2[t]; - } - break; - case 3: - case 4: - for(j = 0; j < SAMPLES_PER_BAND; j += 2){ - t = get_vlc2(gb, q3_vlc[res - 3].table, MPC8_Q3_BITS, 2) + q3_offsets[res - 3]; - c->Q[ch][off + j + 1] = t >> 4; - c->Q[ch][off + j + 0] = (t & 8) ? (t & 0xF) - 16 : (t & 0xF); - } - break; - case 5: - case 6: - case 7: - case 8: - cnt = 2 * mpc8_thres[res]; - for(j = 0; j < SAMPLES_PER_BAND; j++){ - t = get_vlc2(gb, quant_vlc[res - 5][cnt > mpc8_thres[res]].table, quant_vlc[res - 5][cnt > mpc8_thres[res]].bits, 2) + quant_offsets[res - 5]; - c->Q[ch][off + j] = t; - cnt = (cnt >> 1) + FFABS(c->Q[ch][off + j]); - } - break; - default: - for(j = 0; j < SAMPLES_PER_BAND; j++){ - c->Q[ch][off + j] = get_vlc2(gb, q9up_vlc.table, MPC8_Q9UP_BITS, 2); - if(res != 9){ - c->Q[ch][off + j] <<= res - 9; - c->Q[ch][off + j] |= get_bits(gb, res - 9); - } - c->Q[ch][off + j] -= (1 << (res - 2)) - 1; - } - } - } - } - - ff_mpc_dequantize_and_synth(c, maxband, data); - - c->cur_frame++; - - c->last_bits_used = get_bits_count(gb); - if(c->cur_frame >= c->frames) - c->cur_frame = 0; - *data_size = MPC_FRAME_SIZE * 4; - - return c->cur_frame ? c->last_bits_used >> 3 : buf_size; -} - -AVCodec mpc8_decoder = { - "mpc sv8", - CODEC_TYPE_AUDIO, - CODEC_ID_MUSEPACK8, - sizeof(MPCContext), - mpc8_decode_init, - NULL, - NULL, - mpc8_decode_frame, -}; |