/*
* 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 "avcodec.h"
+#include "sinewin.h"
#include "wma.h"
+#include "wma_common.h"
#include "wmadata.h"
#undef NDEBUG
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)
{
WMACodecContext *s = avctx->priv_data;
s->bit_rate = avctx->bit_rate;
s->block_align = avctx->block_align;
- dsputil_init(&s->dsp, avctx);
+ ff_dsputil_init(&s->dsp, avctx);
ff_fmt_convert_init(&s->fmt_conv, avctx);
if (avctx->codec->id == CODEC_ID_WMAV1) {
/* compute MDCT block size */
s->frame_len_bits = ff_wma_get_frame_len_bits(s->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) {
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]);
return 0;
}
-