/*
* WMA compatible codec
- * Copyright (c) 2002-2007 The FFmpeg Project
+ * Copyright (c) 2002-2007 The Libav Project
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/attributes.h"
#include "avcodec.h"
+#include "sinewin.h"
#include "wma.h"
+#include "wma_common.h"
#include "wmadata.h"
#undef NDEBUG
/* 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,
- float **plevel_table, uint16_t **pint_table,
- const CoefVLCTable *vlc_table)
+static av_cold void init_coef_vlc(VLC *vlc, uint16_t **prun_table,
+ float **plevel_table, uint16_t **pint_table,
+ const CoefVLCTable *vlc_table)
{
int n = vlc_table->n;
const uint8_t *table_bits = vlc_table->huffbits;
av_free(level_table);
}
-/**
- *@brief Get the samples per frame for this stream.
- *@param sample_rate output sample_rate
- *@param version wma version
- *@param decode_flags codec compression features
- *@return log2 of the number of output samples per frame
- */
-int av_cold ff_wma_get_frame_len_bits(int sample_rate, int version,
- unsigned int decode_flags)
-{
-
- int frame_len_bits;
-
- if (sample_rate <= 16000) {
- frame_len_bits = 9;
- } else if (sample_rate <= 22050 ||
- (sample_rate <= 32000 && version == 1)) {
- frame_len_bits = 10;
- } else if (sample_rate <= 48000) {
- frame_len_bits = 11;
- } else if (sample_rate <= 96000) {
- frame_len_bits = 12;
- } else {
- frame_len_bits = 13;
- }
-
- if (version == 3) {
- int tmp = decode_flags & 0x6;
- if (tmp == 0x2) {
- ++frame_len_bits;
- } else if (tmp == 0x4) {
- --frame_len_bits;
- } else if (tmp == 0x6) {
- frame_len_bits -= 2;
- }
- }
-
- return frame_len_bits;
-}
-
-int ff_wma_init(AVCodecContext *avctx, int flags2)
+av_cold int ff_wma_init(AVCodecContext *avctx, int flags2)
{
WMACodecContext *s = avctx->priv_data;
int i;
int coef_vlc_table;
if ( avctx->sample_rate <= 0 || avctx->sample_rate > 50000
- || avctx->channels <= 0 || avctx->channels > 8
+ || avctx->channels <= 0 || avctx->channels > 2
|| avctx->bit_rate <= 0)
return -1;
- 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);
+ ff_fmt_convert_init(&s->fmt_conv, avctx);
+ avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
- if (avctx->codec->id == CODEC_ID_WMAV1) {
+ if (avctx->codec->id == AV_CODEC_ID_WMAV1) {
s->version = 1;
} else {
s->version = 2;
}
/* compute MDCT block size */
- s->frame_len_bits = ff_wma_get_frame_len_bits(s->sample_rate, s->version, 0);
+ s->frame_len_bits = ff_wma_get_frame_len_bits(avctx->sample_rate,
+ s->version, 0);
+ s->next_block_len_bits = s->frame_len_bits;
+ s->prev_block_len_bits = s->frame_len_bits;
+ s->block_len_bits = s->frame_len_bits;
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)
+ if ((avctx->bit_rate / avctx->channels) >= 32000)
nb += 2;
nb_max = s->frame_len_bits - BLOCK_MIN_BITS;
if (nb > nb_max)
/* init rate dependent parameters */
s->use_noise_coding = 1;
- high_freq = s->sample_rate * 0.5;
+ high_freq = avctx->sample_rate * 0.5;
/* if version 2, then the rates are normalized */
- sample_rate1 = s->sample_rate;
+ sample_rate1 = avctx->sample_rate;
if (s->version == 2) {
if (sample_rate1 >= 44100) {
sample_rate1 = 44100;
}
}
- bps = (float)s->bit_rate / (float)(s->nb_channels * s->sample_rate);
+ bps = (float)avctx->bit_rate / (float)(avctx->channels * avctx->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)
+ if (avctx->channels == 2)
bps1 = bps * 1.6;
if (sample_rate1 == 44100) {
if (bps1 >= 0.61) {
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",
+ av_dlog(s->avctx, "flags2=0x%x\n", flags2);
+ av_dlog(s->avctx, "version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",
+ s->version, avctx->channels, avctx->sample_rate, avctx->bit_rate,
+ avctx->block_align);
+ av_dlog(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",
+ av_dlog(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 */
lpos = 0;
for (i = 0; i < 25; i++) {
a = ff_wma_critical_freqs[i];
- b = s->sample_rate;
+ b = avctx->sample_rate;
pos = ((block_len * 2 * a) + (b >> 1)) / b;
if (pos > block_len)
pos = block_len;
table = NULL;
a = s->frame_len_bits - BLOCK_MIN_BITS - k;
if (a < 3) {
- if (s->sample_rate >= 44100) {
+ if (avctx->sample_rate >= 44100) {
table = exponent_band_44100[a];
- } else if (s->sample_rate >= 32000) {
+ } else if (avctx->sample_rate >= 32000) {
table = exponent_band_32000[a];
- } else if (s->sample_rate >= 22050) {
+ } else if (avctx->sample_rate >= 22050) {
table = exponent_band_22050[a];
}
}
lpos = 0;
for (i = 0; i < 25; i++) {
a = ff_wma_critical_freqs[i];
- b = s->sample_rate;
+ b = avctx->sample_rate;
pos = ((block_len * 2 * a) + (b << 1)) / (4 * b);
pos <<= 2;
if (pos > block_len)
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);
+ avctx->sample_rate + 0.5);
n = s->exponent_sizes[k];
j = 0;
pos = 0;
}
#endif
- /* init MDCT windows : simple sinus window */
+ /* init MDCT windows : simple sine window */
for (i = 0; i < s->nb_block_sizes; i++) {
ff_init_ff_sine_windows(s->frame_len_bits - i);
s->windows[i] = ff_sine_windows[s->frame_len_bits - i];
/* choose the VLC tables for the coefficients */
coef_vlc_table = 2;
- if (s->sample_rate >= 32000) {
+ if (avctx->sample_rate >= 32000) {
if (bps1 < 0.72) {
coef_vlc_table = 0;
} else if (bps1 < 1.16) {
ff_mdct_end(&s->mdct_ctx[i]);
if (s->use_exp_vlc) {
- free_vlc(&s->exp_vlc);
+ ff_free_vlc(&s->exp_vlc);
}
if (s->use_noise_coding) {
- free_vlc(&s->hgain_vlc);
+ ff_free_vlc(&s->hgain_vlc);
}
for (i = 0; i < 2; i++) {
- free_vlc(&s->coef_vlc[i]);
+ ff_free_vlc(&s->coef_vlc[i]);
av_free(s->run_table[i]);
av_free(s->level_table[i]);
av_free(s->int_table[i]);
/**
* Decode an uncompressed coefficient.
- * @param s codec context
+ * @param gb GetBitContext
* @return the decoded coefficient
*/
unsigned int ff_wma_get_large_val(GetBitContext* gb)
return 0;
}
-
projects / ffmpeg / blobdiff