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Diffstat (limited to 'contrib/ffmpeg/libavcodec/wma.c')
-rw-r--r--contrib/ffmpeg/libavcodec/wma.c386
1 files changed, 0 insertions, 386 deletions
diff --git a/contrib/ffmpeg/libavcodec/wma.c b/contrib/ffmpeg/libavcodec/wma.c
deleted file mode 100644
index 2241a07a0..000000000
--- a/contrib/ffmpeg/libavcodec/wma.c
+++ /dev/null
@@ -1,386 +0,0 @@
-/*
- * WMA compatible codec
- * Copyright (c) 2002-2007 The FFmpeg Project.
- *
- * 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"
-#include "wma.h"
-#include "wmadata.h"
-
-#undef NDEBUG
-#include <assert.h>
-
-/* XXX: use same run/length optimization as mpeg decoders */
-//FIXME maybe split decode / encode or pass flag
-static void init_coef_vlc(VLC *vlc,
- uint16_t **prun_table, uint16_t **plevel_table, uint16_t **pint_table,
- const CoefVLCTable *vlc_table)
-{
- int n = vlc_table->n;
- const uint8_t *table_bits = vlc_table->huffbits;
- const uint32_t *table_codes = vlc_table->huffcodes;
- const uint16_t *levels_table = vlc_table->levels;
- uint16_t *run_table, *level_table, *int_table;
- int i, l, j, k, level;
-
- init_vlc(vlc, VLCBITS, n, table_bits, 1, 1, table_codes, 4, 4, 0);
-
- run_table = av_malloc(n * sizeof(uint16_t));
- level_table = av_malloc(n * sizeof(uint16_t));
- int_table = av_malloc(n * sizeof(uint16_t));
- i = 2;
- level = 1;
- k = 0;
- while (i < n) {
- int_table[k]= i;
- l = levels_table[k++];
- for(j=0;j<l;j++) {
- run_table[i] = j;
- level_table[i] = level;
- i++;
- }
- level++;
- }
- *prun_table = run_table;
- *plevel_table = level_table;
- *pint_table= int_table;
-}
-
-int ff_wma_init(AVCodecContext * avctx, int flags2)
-{
- WMACodecContext *s = avctx->priv_data;
- int i;
- float *window;
- float bps1, high_freq;
- volatile float bps;
- int sample_rate1;
- int coef_vlc_table;
-
- s->sample_rate = avctx->sample_rate;
- s->nb_channels = avctx->channels;
- s->bit_rate = avctx->bit_rate;
- s->block_align = avctx->block_align;
-
- dsputil_init(&s->dsp, avctx);
-
- if (avctx->codec->id == CODEC_ID_WMAV1) {
- s->version = 1;
- } else {
- s->version = 2;
- }
-
- /* compute MDCT block size */
- if (s->sample_rate <= 16000) {
- s->frame_len_bits = 9;
- } else if (s->sample_rate <= 22050 ||
- (s->sample_rate <= 32000 && s->version == 1)) {
- s->frame_len_bits = 10;
- } else {
- s->frame_len_bits = 11;
- }
- s->frame_len = 1 << s->frame_len_bits;
- if (s->use_variable_block_len) {
- int nb_max, nb;
- nb = ((flags2 >> 3) & 3) + 1;
- if ((s->bit_rate / s->nb_channels) >= 32000)
- nb += 2;
- nb_max = s->frame_len_bits - BLOCK_MIN_BITS;
- if (nb > nb_max)
- nb = nb_max;
- s->nb_block_sizes = nb + 1;
- } else {
- s->nb_block_sizes = 1;
- }
-
- /* init rate dependent parameters */
- s->use_noise_coding = 1;
- high_freq = s->sample_rate * 0.5;
-
- /* if version 2, then the rates are normalized */
- sample_rate1 = s->sample_rate;
- if (s->version == 2) {
- if (sample_rate1 >= 44100)
- sample_rate1 = 44100;
- else if (sample_rate1 >= 22050)
- sample_rate1 = 22050;
- else if (sample_rate1 >= 16000)
- sample_rate1 = 16000;
- else if (sample_rate1 >= 11025)
- sample_rate1 = 11025;
- else if (sample_rate1 >= 8000)
- sample_rate1 = 8000;
- }
-
- bps = (float)s->bit_rate / (float)(s->nb_channels * s->sample_rate);
- s->byte_offset_bits = av_log2((int)(bps * s->frame_len / 8.0 + 0.5)) + 2;
-
- /* compute high frequency value and choose if noise coding should
- be activated */
- bps1 = bps;
- if (s->nb_channels == 2)
- bps1 = bps * 1.6;
- if (sample_rate1 == 44100) {
- if (bps1 >= 0.61)
- s->use_noise_coding = 0;
- else
- high_freq = high_freq * 0.4;
- } else if (sample_rate1 == 22050) {
- if (bps1 >= 1.16)
- s->use_noise_coding = 0;
- else if (bps1 >= 0.72)
- high_freq = high_freq * 0.7;
- else
- high_freq = high_freq * 0.6;
- } else if (sample_rate1 == 16000) {
- if (bps > 0.5)
- high_freq = high_freq * 0.5;
- else
- high_freq = high_freq * 0.3;
- } else if (sample_rate1 == 11025) {
- high_freq = high_freq * 0.7;
- } else if (sample_rate1 == 8000) {
- if (bps <= 0.625) {
- high_freq = high_freq * 0.5;
- } else if (bps > 0.75) {
- s->use_noise_coding = 0;
- } else {
- high_freq = high_freq * 0.65;
- }
- } else {
- if (bps >= 0.8) {
- high_freq = high_freq * 0.75;
- } else if (bps >= 0.6) {
- high_freq = high_freq * 0.6;
- } else {
- high_freq = high_freq * 0.5;
- }
- }
- dprintf(s->avctx, "flags2=0x%x\n", flags2);
- dprintf(s->avctx, "version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",
- s->version, s->nb_channels, s->sample_rate, s->bit_rate,
- s->block_align);
- dprintf(s->avctx, "bps=%f bps1=%f high_freq=%f bitoffset=%d\n",
- bps, bps1, high_freq, s->byte_offset_bits);
- dprintf(s->avctx, "use_noise_coding=%d use_exp_vlc=%d nb_block_sizes=%d\n",
- s->use_noise_coding, s->use_exp_vlc, s->nb_block_sizes);
-
- /* compute the scale factor band sizes for each MDCT block size */
- {
- int a, b, pos, lpos, k, block_len, i, j, n;
- const uint8_t *table;
-
- if (s->version == 1) {
- s->coefs_start = 3;
- } else {
- s->coefs_start = 0;
- }
- for(k = 0; k < s->nb_block_sizes; k++) {
- block_len = s->frame_len >> k;
-
- if (s->version == 1) {
- lpos = 0;
- for(i=0;i<25;i++) {
- a = wma_critical_freqs[i];
- b = s->sample_rate;
- pos = ((block_len * 2 * a) + (b >> 1)) / b;
- if (pos > block_len)
- pos = block_len;
- s->exponent_bands[0][i] = pos - lpos;
- if (pos >= block_len) {
- i++;
- break;
- }
- lpos = pos;
- }
- s->exponent_sizes[0] = i;
- } else {
- /* hardcoded tables */
- table = NULL;
- a = s->frame_len_bits - BLOCK_MIN_BITS - k;
- if (a < 3) {
- if (s->sample_rate >= 44100)
- table = exponent_band_44100[a];
- else if (s->sample_rate >= 32000)
- table = exponent_band_32000[a];
- else if (s->sample_rate >= 22050)
- table = exponent_band_22050[a];
- }
- if (table) {
- n = *table++;
- for(i=0;i<n;i++)
- s->exponent_bands[k][i] = table[i];
- s->exponent_sizes[k] = n;
- } else {
- j = 0;
- lpos = 0;
- for(i=0;i<25;i++) {
- a = wma_critical_freqs[i];
- b = s->sample_rate;
- pos = ((block_len * 2 * a) + (b << 1)) / (4 * b);
- pos <<= 2;
- if (pos > block_len)
- pos = block_len;
- if (pos > lpos)
- s->exponent_bands[k][j++] = pos - lpos;
- if (pos >= block_len)
- break;
- lpos = pos;
- }
- s->exponent_sizes[k] = j;
- }
- }
-
- /* max number of coefs */
- s->coefs_end[k] = (s->frame_len - ((s->frame_len * 9) / 100)) >> k;
- /* high freq computation */
- s->high_band_start[k] = (int)((block_len * 2 * high_freq) /
- s->sample_rate + 0.5);
- n = s->exponent_sizes[k];
- j = 0;
- pos = 0;
- for(i=0;i<n;i++) {
- int start, end;
- start = pos;
- pos += s->exponent_bands[k][i];
- end = pos;
- if (start < s->high_band_start[k])
- start = s->high_band_start[k];
- if (end > s->coefs_end[k])
- end = s->coefs_end[k];
- if (end > start)
- s->exponent_high_bands[k][j++] = end - start;
- }
- s->exponent_high_sizes[k] = j;
-#if 0
- tprintf(s->avctx, "%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",
- s->frame_len >> k,
- s->coefs_end[k],
- s->high_band_start[k],
- s->exponent_high_sizes[k]);
- for(j=0;j<s->exponent_high_sizes[k];j++)
- tprintf(s->avctx, " %d", s->exponent_high_bands[k][j]);
- tprintf(s->avctx, "\n");
-#endif
- }
- }
-
-#ifdef TRACE
- {
- int i, j;
- for(i = 0; i < s->nb_block_sizes; i++) {
- tprintf(s->avctx, "%5d: n=%2d:",
- s->frame_len >> i,
- s->exponent_sizes[i]);
- for(j=0;j<s->exponent_sizes[i];j++)
- tprintf(s->avctx, " %d", s->exponent_bands[i][j]);
- tprintf(s->avctx, "\n");
- }
- }
-#endif
-
- /* init MDCT windows : simple sinus window */
- for(i = 0; i < s->nb_block_sizes; i++) {
- int n, j;
- float alpha;
- n = 1 << (s->frame_len_bits - i);
- window = av_malloc(sizeof(float) * n);
- alpha = M_PI / (2.0 * n);
- for(j=0;j<n;j++) {
- window[j] = sin((j + 0.5) * alpha);
- }
- s->windows[i] = window;
- }
-
- s->reset_block_lengths = 1;
-
- if (s->use_noise_coding) {
-
- /* init the noise generator */
- if (s->use_exp_vlc)
- s->noise_mult = 0.02;
- else
- s->noise_mult = 0.04;
-
-#ifdef TRACE
- for(i=0;i<NOISE_TAB_SIZE;i++)
- s->noise_table[i] = 1.0 * s->noise_mult;
-#else
- {
- unsigned int seed;
- float norm;
- seed = 1;
- norm = (1.0 / (float)(1LL << 31)) * sqrt(3) * s->noise_mult;
- for(i=0;i<NOISE_TAB_SIZE;i++) {
- seed = seed * 314159 + 1;
- s->noise_table[i] = (float)((int)seed) * norm;
- }
- }
-#endif
- }
-
- /* choose the VLC tables for the coefficients */
- coef_vlc_table = 2;
- if (s->sample_rate >= 32000) {
- if (bps1 < 0.72)
- coef_vlc_table = 0;
- else if (bps1 < 1.16)
- coef_vlc_table = 1;
- }
- s->coef_vlcs[0]= &coef_vlcs[coef_vlc_table * 2 ];
- s->coef_vlcs[1]= &coef_vlcs[coef_vlc_table * 2 + 1];
- init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0], &s->int_table[0],
- s->coef_vlcs[0]);
- init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1], &s->int_table[1],
- s->coef_vlcs[1]);
-
- return 0;
-}
-
-int ff_wma_total_gain_to_bits(int total_gain){
- if (total_gain < 15) return 13;
- else if (total_gain < 32) return 12;
- else if (total_gain < 40) return 11;
- else if (total_gain < 45) return 10;
- else return 9;
-}
-
-int ff_wma_end(AVCodecContext *avctx)
-{
- WMACodecContext *s = avctx->priv_data;
- int i;
-
- for(i = 0; i < s->nb_block_sizes; i++)
- ff_mdct_end(&s->mdct_ctx[i]);
- for(i = 0; i < s->nb_block_sizes; i++)
- av_free(s->windows[i]);
-
- if (s->use_exp_vlc) {
- free_vlc(&s->exp_vlc);
- }
- if (s->use_noise_coding) {
- free_vlc(&s->hgain_vlc);
- }
- for(i = 0;i < 2; i++) {
- free_vlc(&s->coef_vlc[i]);
- av_free(s->run_table[i]);
- av_free(s->level_table[i]);
- }
-
- return 0;
-}
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