diff options
| author | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
| commit | 741fb4b9e135cfb161a749db88713229038577bb (patch) | |
| tree | 08bc9925659cbcac45162bacf31dc6336d4f60b4 /ffmpeg1/libavcodec/mpc.c | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavcodec/mpc.c')
| -rw-r--r-- | ffmpeg1/libavcodec/mpc.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/ffmpeg1/libavcodec/mpc.c b/ffmpeg1/libavcodec/mpc.c deleted file mode 100644 index 3bd2d35..0000000 --- a/ffmpeg1/libavcodec/mpc.c +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Musepack decoder core - * Copyright (c) 2006 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 - * Musepack decoder core - * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples - * divided into 32 subbands. - */ - -#include "avcodec.h" -#include "get_bits.h" -#include "mpegaudiodsp.h" -#include "mpegaudio.h" - -#include "mpc.h" -#include "mpcdata.h" - -void ff_mpc_init(void) -{ - ff_mpa_synth_init_fixed(ff_mpa_synth_window_fixed); -} - -/** - * Process decoded Musepack data and produce PCM - */ -static void mpc_synth(MPCContext *c, int16_t **out, int channels) -{ - int dither_state = 0; - int i, ch; - - for(ch = 0; ch < channels; ch++){ - for(i = 0; i < SAMPLES_PER_BAND; i++) { - ff_mpa_synth_filter_fixed(&c->mpadsp, - c->synth_buf[ch], &(c->synth_buf_offset[ch]), - ff_mpa_synth_window_fixed, &dither_state, - out[ch] + 32 * i, 1, - c->sb_samples[ch][i]); - } - } -} - -void ff_mpc_dequantize_and_synth(MPCContext * c, int maxband, int16_t **out, - int channels) -{ - int i, j, ch; - Band *bands = c->bands; - int off; - float mul; - - /* dequantize */ - memset(c->sb_samples, 0, sizeof(c->sb_samples)); - off = 0; - for(i = 0; i <= maxband; i++, off += SAMPLES_PER_BAND){ - for(ch = 0; ch < 2; ch++){ - if(bands[i].res[ch]){ - j = 0; - mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][0] & 0xFF]; - for(; j < 12; j++) - c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; - mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][1] & 0xFF]; - for(; j < 24; j++) - c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; - mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][2] & 0xFF]; - for(; j < 36; j++) - c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; - } - } - if(bands[i].msf){ - int t1, t2; - for(j = 0; j < SAMPLES_PER_BAND; j++){ - t1 = c->sb_samples[0][j][i]; - t2 = c->sb_samples[1][j][i]; - c->sb_samples[0][j][i] = t1 + t2; - c->sb_samples[1][j][i] = t1 - t2; - } - } - } - - mpc_synth(c, out, channels); -} |
