/*
* WMA compatible decoder
- * Copyright (c) 2002 The FFmpeg Project.
+ * Copyright (c) 2002 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
*/
/**
- * @file wmadec.c
+ * @file
* WMA compatible decoder.
* This decoder handles Microsoft Windows Media Audio data, versions 1 & 2.
* WMA v1 is identified by audio format 0x160 in Microsoft media files
#define HGAINVLCBITS 9
#define HGAINMAX ((13+HGAINVLCBITS-1)/HGAINVLCBITS)
-static void wma_lsp_to_curve_init(WMADecodeContext *s, int frame_len);
+static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len);
#ifdef TRACE
-static void dump_shorts(WMADecodeContext *s, const char *name, const short *tab, int n)
+static void dump_shorts(WMACodecContext *s, const char *name, const short *tab, int n)
{
int i;
}
}
-static void dump_floats(WMADecodeContext *s, const char *name, int prec, const float *tab, int n)
+static void dump_floats(WMACodecContext *s, const char *name, int prec, const float *tab, int n)
{
int i;
static int wma_decode_init(AVCodecContext * avctx)
{
- WMADecodeContext *s = avctx->priv_data;
- int i, flags1, flags2;
+ WMACodecContext *s = avctx->priv_data;
+ int i, flags2;
uint8_t *extradata;
s->avctx = avctx;
/* extract flag infos */
- flags1 = 0;
flags2 = 0;
extradata = avctx->extradata;
if (avctx->codec->id == CODEC_ID_WMAV1 && avctx->extradata_size >= 4) {
- flags1 = extradata[0] | (extradata[1] << 8);
- flags2 = extradata[2] | (extradata[3] << 8);
+ flags2 = AV_RL16(extradata+2);
} else if (avctx->codec->id == CODEC_ID_WMAV2 && avctx->extradata_size >= 6) {
- flags1 = extradata[0] | (extradata[1] << 8) |
- (extradata[2] << 16) | (extradata[3] << 24);
- flags2 = extradata[4] | (extradata[5] << 8);
+ flags2 = AV_RL16(extradata+4);
}
// for(i=0; i<avctx->extradata_size; i++)
// av_log(NULL, AV_LOG_ERROR, "%02X ", extradata[i]);
s->use_bit_reservoir = flags2 & 0x0002;
s->use_variable_block_len = flags2 & 0x0004;
- ff_wma_init(avctx, flags2);
+ if(ff_wma_init(avctx, flags2)<0)
+ return -1;
/* init MDCT */
for(i = 0; i < s->nb_block_sizes; i++)
- ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 1);
+ ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 1, 1.0);
if (s->use_noise_coding) {
init_vlc(&s->hgain_vlc, HGAINVLCBITS, sizeof(ff_wma_hgain_huffbits),
}
if (s->use_exp_vlc) {
- init_vlc(&s->exp_vlc, EXPVLCBITS, sizeof(ff_wma_scale_huffbits), //FIXME move out of context
- ff_wma_scale_huffbits, 1, 1,
- ff_wma_scale_huffcodes, 4, 4, 0);
+ init_vlc(&s->exp_vlc, EXPVLCBITS, sizeof(ff_aac_scalefactor_bits), //FIXME move out of context
+ ff_aac_scalefactor_bits, 1, 1,
+ ff_aac_scalefactor_code, 4, 4, 0);
} else {
wma_lsp_to_curve_init(s, s->frame_len);
}
- return 0;
-}
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
-/**
- * interpolate values for a bigger or smaller block. The block must
- * have multiple sizes
- */
-static void interpolate_array(float *scale, int old_size, int new_size)
-{
- int i, j, jincr, k;
- float v;
-
- if (new_size > old_size) {
- jincr = new_size / old_size;
- j = new_size;
- for(i = old_size - 1; i >=0; i--) {
- v = scale[i];
- k = jincr;
- do {
- scale[--j] = v;
- } while (--k);
- }
- } else if (new_size < old_size) {
- j = 0;
- jincr = old_size / new_size;
- for(i = 0; i < new_size; i++) {
- scale[i] = scale[j];
- j += jincr;
- }
- }
+ avcodec_get_frame_defaults(&s->frame);
+ avctx->coded_frame = &s->frame;
+
+ return 0;
}
/**
* expense (linear interpolation approximately doubles the number of
* bits of precision).
*/
-static inline float pow_m1_4(WMADecodeContext *s, float x)
+static inline float pow_m1_4(WMACodecContext *s, float x)
{
union {
float f;
return s->lsp_pow_e_table[e] * (a + b * t.f);
}
-static void wma_lsp_to_curve_init(WMADecodeContext *s, int frame_len)
+static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len)
{
float wdel, a, b;
int i, e, m;
s->lsp_pow_m_table2[i] = b - a;
b = a;
}
-#if 0
- for(i=1;i<20;i++) {
- float v, r1, r2;
- v = 5.0 / i;
- r1 = pow_m1_4(s, v);
- r2 = pow(v,-0.25);
- printf("%f^-0.25=%f e=%f\n", v, r1, r2 - r1);
- }
-#endif
}
/**
* NOTE: We use the same code as Vorbis here
* @todo optimize it further with SSE/3Dnow
*/
-static void wma_lsp_to_curve(WMADecodeContext *s,
+static void wma_lsp_to_curve(WMACodecContext *s,
float *out, float *val_max_ptr,
int n, float *lsp)
{
/**
* decode exponents coded with LSP coefficients (same idea as Vorbis)
*/
-static void decode_exp_lsp(WMADecodeContext *s, int ch)
+static void decode_exp_lsp(WMACodecContext *s, int ch)
{
float lsp_coefs[NB_LSP_COEFS];
int val, i;
s->block_len, lsp_coefs);
}
+/** pow(10, i / 16.0) for i in -60..95 */
+static const float pow_tab[] = {
+ 1.7782794100389e-04, 2.0535250264571e-04,
+ 2.3713737056617e-04, 2.7384196342644e-04,
+ 3.1622776601684e-04, 3.6517412725484e-04,
+ 4.2169650342858e-04, 4.8696752516586e-04,
+ 5.6234132519035e-04, 6.4938163157621e-04,
+ 7.4989420933246e-04, 8.6596432336006e-04,
+ 1.0000000000000e-03, 1.1547819846895e-03,
+ 1.3335214321633e-03, 1.5399265260595e-03,
+ 1.7782794100389e-03, 2.0535250264571e-03,
+ 2.3713737056617e-03, 2.7384196342644e-03,
+ 3.1622776601684e-03, 3.6517412725484e-03,
+ 4.2169650342858e-03, 4.8696752516586e-03,
+ 5.6234132519035e-03, 6.4938163157621e-03,
+ 7.4989420933246e-03, 8.6596432336006e-03,
+ 1.0000000000000e-02, 1.1547819846895e-02,
+ 1.3335214321633e-02, 1.5399265260595e-02,
+ 1.7782794100389e-02, 2.0535250264571e-02,
+ 2.3713737056617e-02, 2.7384196342644e-02,
+ 3.1622776601684e-02, 3.6517412725484e-02,
+ 4.2169650342858e-02, 4.8696752516586e-02,
+ 5.6234132519035e-02, 6.4938163157621e-02,
+ 7.4989420933246e-02, 8.6596432336007e-02,
+ 1.0000000000000e-01, 1.1547819846895e-01,
+ 1.3335214321633e-01, 1.5399265260595e-01,
+ 1.7782794100389e-01, 2.0535250264571e-01,
+ 2.3713737056617e-01, 2.7384196342644e-01,
+ 3.1622776601684e-01, 3.6517412725484e-01,
+ 4.2169650342858e-01, 4.8696752516586e-01,
+ 5.6234132519035e-01, 6.4938163157621e-01,
+ 7.4989420933246e-01, 8.6596432336007e-01,
+ 1.0000000000000e+00, 1.1547819846895e+00,
+ 1.3335214321633e+00, 1.5399265260595e+00,
+ 1.7782794100389e+00, 2.0535250264571e+00,
+ 2.3713737056617e+00, 2.7384196342644e+00,
+ 3.1622776601684e+00, 3.6517412725484e+00,
+ 4.2169650342858e+00, 4.8696752516586e+00,
+ 5.6234132519035e+00, 6.4938163157621e+00,
+ 7.4989420933246e+00, 8.6596432336007e+00,
+ 1.0000000000000e+01, 1.1547819846895e+01,
+ 1.3335214321633e+01, 1.5399265260595e+01,
+ 1.7782794100389e+01, 2.0535250264571e+01,
+ 2.3713737056617e+01, 2.7384196342644e+01,
+ 3.1622776601684e+01, 3.6517412725484e+01,
+ 4.2169650342858e+01, 4.8696752516586e+01,
+ 5.6234132519035e+01, 6.4938163157621e+01,
+ 7.4989420933246e+01, 8.6596432336007e+01,
+ 1.0000000000000e+02, 1.1547819846895e+02,
+ 1.3335214321633e+02, 1.5399265260595e+02,
+ 1.7782794100389e+02, 2.0535250264571e+02,
+ 2.3713737056617e+02, 2.7384196342644e+02,
+ 3.1622776601684e+02, 3.6517412725484e+02,
+ 4.2169650342858e+02, 4.8696752516586e+02,
+ 5.6234132519035e+02, 6.4938163157621e+02,
+ 7.4989420933246e+02, 8.6596432336007e+02,
+ 1.0000000000000e+03, 1.1547819846895e+03,
+ 1.3335214321633e+03, 1.5399265260595e+03,
+ 1.7782794100389e+03, 2.0535250264571e+03,
+ 2.3713737056617e+03, 2.7384196342644e+03,
+ 3.1622776601684e+03, 3.6517412725484e+03,
+ 4.2169650342858e+03, 4.8696752516586e+03,
+ 5.6234132519035e+03, 6.4938163157621e+03,
+ 7.4989420933246e+03, 8.6596432336007e+03,
+ 1.0000000000000e+04, 1.1547819846895e+04,
+ 1.3335214321633e+04, 1.5399265260595e+04,
+ 1.7782794100389e+04, 2.0535250264571e+04,
+ 2.3713737056617e+04, 2.7384196342644e+04,
+ 3.1622776601684e+04, 3.6517412725484e+04,
+ 4.2169650342858e+04, 4.8696752516586e+04,
+ 5.6234132519035e+04, 6.4938163157621e+04,
+ 7.4989420933246e+04, 8.6596432336007e+04,
+ 1.0000000000000e+05, 1.1547819846895e+05,
+ 1.3335214321633e+05, 1.5399265260595e+05,
+ 1.7782794100389e+05, 2.0535250264571e+05,
+ 2.3713737056617e+05, 2.7384196342644e+05,
+ 3.1622776601684e+05, 3.6517412725484e+05,
+ 4.2169650342858e+05, 4.8696752516586e+05,
+ 5.6234132519035e+05, 6.4938163157621e+05,
+ 7.4989420933246e+05, 8.6596432336007e+05,
+};
+
/**
* decode exponents coded with VLC codes
*/
-static int decode_exp_vlc(WMADecodeContext *s, int ch)
+static int decode_exp_vlc(WMACodecContext *s, int ch)
{
int last_exp, n, code;
- const uint16_t *ptr, *band_ptr;
- float v, *q, max_scale, *q_end;
-
- band_ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
- ptr = band_ptr;
- q = s->exponents[ch];
+ const uint16_t *ptr;
+ float v, max_scale;
+ uint32_t *q, *q_end, iv;
+ const float *ptab = pow_tab + 60;
+ const uint32_t *iptab = (const uint32_t*)ptab;
+
+ ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits];
+ q = (uint32_t *)s->exponents[ch];
q_end = q + s->block_len;
max_scale = 0;
if (s->version == 1) {
last_exp = get_bits(&s->gb, 5) + 10;
- /* XXX: use a table */
- v = pow(10, last_exp * (1.0 / 16.0));
+ v = ptab[last_exp];
+ iv = iptab[last_exp];
max_scale = v;
n = *ptr++;
- do {
- *q++ = v;
- } while (--n);
+ switch (n & 3) do {
+ case 0: *q++ = iv;
+ case 3: *q++ = iv;
+ case 2: *q++ = iv;
+ case 1: *q++ = iv;
+ } while ((n -= 4) > 0);
}else
last_exp = 36;
while (q < q_end) {
code = get_vlc2(&s->gb, s->exp_vlc.table, EXPVLCBITS, EXPMAX);
- if (code < 0)
+ if (code < 0){
+ av_log(s->avctx, AV_LOG_ERROR, "Exponent vlc invalid\n");
return -1;
+ }
/* NOTE: this offset is the same as MPEG4 AAC ! */
last_exp += code - 60;
- /* XXX: use a table */
- v = pow(10, last_exp * (1.0 / 16.0));
+ if ((unsigned)last_exp + 60 > FF_ARRAY_ELEMS(pow_tab)) {
+ av_log(s->avctx, AV_LOG_ERROR, "Exponent out of range: %d\n",
+ last_exp);
+ return -1;
+ }
+ v = ptab[last_exp];
+ iv = iptab[last_exp];
if (v > max_scale)
max_scale = v;
n = *ptr++;
- do {
- *q++ = v;
- } while (--n);
+ switch (n & 3) do {
+ case 0: *q++ = iv;
+ case 3: *q++ = iv;
+ case 2: *q++ = iv;
+ case 1: *q++ = iv;
+ } while ((n -= 4) > 0);
}
s->max_exponent[ch] = max_scale;
return 0;
}
+
+/**
+ * Apply MDCT window and add into output.
+ *
+ * We ensure that when the windows overlap their squared sum
+ * is always 1 (MDCT reconstruction rule).
+ */
+static void wma_window(WMACodecContext *s, float *out)
+{
+ float *in = s->output;
+ int block_len, bsize, n;
+
+ /* left part */
+ if (s->block_len_bits <= s->prev_block_len_bits) {
+ block_len = s->block_len;
+ bsize = s->frame_len_bits - s->block_len_bits;
+
+ s->dsp.vector_fmul_add(out, in, s->windows[bsize],
+ out, block_len);
+
+ } else {
+ block_len = 1 << s->prev_block_len_bits;
+ n = (s->block_len - block_len) / 2;
+ bsize = s->frame_len_bits - s->prev_block_len_bits;
+
+ s->dsp.vector_fmul_add(out+n, in+n, s->windows[bsize],
+ out+n, block_len);
+
+ memcpy(out+n+block_len, in+n+block_len, n*sizeof(float));
+ }
+
+ out += s->block_len;
+ in += s->block_len;
+
+ /* right part */
+ if (s->block_len_bits <= s->next_block_len_bits) {
+ block_len = s->block_len;
+ bsize = s->frame_len_bits - s->block_len_bits;
+
+ s->dsp.vector_fmul_reverse(out, in, s->windows[bsize], block_len);
+
+ } else {
+ block_len = 1 << s->next_block_len_bits;
+ n = (s->block_len - block_len) / 2;
+ bsize = s->frame_len_bits - s->next_block_len_bits;
+
+ memcpy(out, in, n*sizeof(float));
+
+ s->dsp.vector_fmul_reverse(out+n, in+n, s->windows[bsize], block_len);
+
+ memset(out+n+block_len, 0, n*sizeof(float));
+ }
+}
+
+
/**
* @return 0 if OK. 1 if last block of frame. return -1 if
* unrecorrable error.
*/
-static int wma_decode_block(WMADecodeContext *s)
+static int wma_decode_block(WMACodecContext *s)
{
- int n, v, a, ch, code, bsize;
- int coef_nb_bits, total_gain, parse_exponents;
+ int n, v, a, ch, bsize;
+ int coef_nb_bits, total_gain;
int nb_coefs[MAX_CHANNELS];
float mdct_norm;
+ FFTContext *mdct;
#ifdef TRACE
tprintf(s->avctx, "***decode_block: %d:%d\n", s->frame_count - 1, s->block_num);
if (s->reset_block_lengths) {
s->reset_block_lengths = 0;
v = get_bits(&s->gb, n);
- if (v >= s->nb_block_sizes)
+ if (v >= s->nb_block_sizes){
+ av_log(s->avctx, AV_LOG_ERROR, "prev_block_len_bits %d out of range\n", s->frame_len_bits - v);
return -1;
+ }
s->prev_block_len_bits = s->frame_len_bits - v;
v = get_bits(&s->gb, n);
- if (v >= s->nb_block_sizes)
+ if (v >= s->nb_block_sizes){
+ av_log(s->avctx, AV_LOG_ERROR, "block_len_bits %d out of range\n", s->frame_len_bits - v);
return -1;
+ }
s->block_len_bits = s->frame_len_bits - v;
} else {
/* update block lengths */
s->block_len_bits = s->next_block_len_bits;
}
v = get_bits(&s->gb, n);
- if (v >= s->nb_block_sizes)
+ if (v >= s->nb_block_sizes){
+ av_log(s->avctx, AV_LOG_ERROR, "next_block_len_bits %d out of range\n", s->frame_len_bits - v);
return -1;
+ }
s->next_block_len_bits = s->frame_len_bits - v;
} else {
/* fixed block len */
/* now check if the block length is coherent with the frame length */
s->block_len = 1 << s->block_len_bits;
- if ((s->block_pos + s->block_len) > s->frame_len)
+ if ((s->block_pos + s->block_len) > s->frame_len){
+ av_log(s->avctx, AV_LOG_ERROR, "frame_len overflow\n");
return -1;
+ }
if (s->nb_channels == 2) {
- s->ms_stereo = get_bits(&s->gb, 1);
+ s->ms_stereo = get_bits1(&s->gb);
}
v = 0;
for(ch = 0; ch < s->nb_channels; ch++) {
- a = get_bits(&s->gb, 1);
+ a = get_bits1(&s->gb);
s->channel_coded[ch] = a;
v |= a;
}
+
+ bsize = s->frame_len_bits - s->block_len_bits;
+
/* if no channel coded, no need to go further */
/* XXX: fix potential framing problems */
if (!v)
goto next;
- bsize = s->frame_len_bits - s->block_len_bits;
-
/* read total gain and extract corresponding number of bits for
coef escape coding */
total_gain = 1;
int i, n, a;
n = s->exponent_high_sizes[bsize];
for(i=0;i<n;i++) {
- a = get_bits(&s->gb, 1);
+ a = get_bits1(&s->gb);
s->high_band_coded[ch][i] = a;
/* if noise coding, the coefficients are not transmitted */
if (a)
val = get_bits(&s->gb, 7) - 19;
} else {
code = get_vlc2(&s->gb, s->hgain_vlc.table, HGAINVLCBITS, HGAINMAX);
- if (code < 0)
+ if (code < 0){
+ av_log(s->avctx, AV_LOG_ERROR, "hgain vlc invalid\n");
return -1;
+ }
val += code - 18;
}
s->high_band_values[ch][i] = val;
}
}
- /* exposant can be interpolated in short blocks. */
- parse_exponents = 1;
- if (s->block_len_bits != s->frame_len_bits) {
- parse_exponents = get_bits(&s->gb, 1);
- }
-
- if (parse_exponents) {
+ /* exponents can be reused in short blocks. */
+ if ((s->block_len_bits == s->frame_len_bits) ||
+ get_bits1(&s->gb)) {
for(ch = 0; ch < s->nb_channels; ch++) {
if (s->channel_coded[ch]) {
if (s->use_exp_vlc) {
} else {
decode_exp_lsp(s, ch);
}
- }
- }
- } else {
- for(ch = 0; ch < s->nb_channels; ch++) {
- if (s->channel_coded[ch]) {
- interpolate_array(s->exponents[ch], 1 << s->prev_block_len_bits,
- s->block_len);
+ s->exponents_bsize[ch] = bsize;
}
}
}
/* parse spectral coefficients : just RLE encoding */
for(ch = 0; ch < s->nb_channels; ch++) {
if (s->channel_coded[ch]) {
- VLC *coef_vlc;
- int level, run, sign, tindex;
- int16_t *ptr, *eptr;
- const uint16_t *level_table, *run_table;
+ int tindex;
+ WMACoef* ptr = &s->coefs1[ch][0];
/* special VLC tables are used for ms stereo because
there is potentially less energy there */
tindex = (ch == 1 && s->ms_stereo);
- coef_vlc = &s->coef_vlc[tindex];
- run_table = s->run_table[tindex];
- level_table = s->level_table[tindex];
- /* XXX: optimize */
- ptr = &s->coefs1[ch][0];
- eptr = ptr + nb_coefs[ch];
- memset(ptr, 0, s->block_len * sizeof(int16_t));
- for(;;) {
- code = get_vlc2(&s->gb, coef_vlc->table, VLCBITS, VLCMAX);
- if (code < 0)
- return -1;
- if (code == 1) {
- /* EOB */
- break;
- } else if (code == 0) {
- /* escape */
- level = get_bits(&s->gb, coef_nb_bits);
- /* NOTE: this is rather suboptimal. reading
- block_len_bits would be better */
- run = get_bits(&s->gb, s->frame_len_bits);
- } else {
- /* normal code */
- run = run_table[code];
- level = level_table[code];
- }
- sign = get_bits(&s->gb, 1);
- if (!sign)
- level = -level;
- ptr += run;
- if (ptr >= eptr)
- {
- av_log(NULL, AV_LOG_ERROR, "overflow in spectral RLE, ignoring\n");
- break;
- }
- *ptr++ = level;
- /* NOTE: EOB can be omitted */
- if (ptr >= eptr)
- break;
- }
+ memset(ptr, 0, s->block_len * sizeof(WMACoef));
+ ff_wma_run_level_decode(s->avctx, &s->gb, &s->coef_vlc[tindex],
+ s->level_table[tindex], s->run_table[tindex],
+ 0, ptr, 0, nb_coefs[ch],
+ s->block_len, s->frame_len_bits, coef_nb_bits);
}
if (s->version == 1 && s->nb_channels >= 2) {
align_get_bits(&s->gb);
/* finally compute the MDCT coefficients */
for(ch = 0; ch < s->nb_channels; ch++) {
if (s->channel_coded[ch]) {
- int16_t *coefs1;
- float *coefs, *exponents, mult, mult1, noise, *exp_ptr;
- int i, j, n, n1, last_high_band;
+ WMACoef *coefs1;
+ float *coefs, *exponents, mult, mult1, noise;
+ int i, j, n, n1, last_high_band, esize;
float exp_power[HIGH_BAND_MAX_SIZE];
coefs1 = s->coefs1[ch];
exponents = s->exponents[ch];
+ esize = s->exponents_bsize[ch];
mult = pow(10, total_gain * 0.05) / s->max_exponent[ch];
mult *= mdct_norm;
coefs = s->coefs[ch];
mult1 = mult;
/* very low freqs : noise */
for(i = 0;i < s->coefs_start; i++) {
- *coefs++ = s->noise_table[s->noise_index] * (*exponents++) * mult1;
+ *coefs++ = s->noise_table[s->noise_index] *
+ exponents[i<<bsize>>esize] * mult1;
s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
}
n1 = s->exponent_high_sizes[bsize];
/* compute power of high bands */
- exp_ptr = exponents +
- s->high_band_start[bsize] -
- s->coefs_start;
+ exponents = s->exponents[ch] +
+ (s->high_band_start[bsize]<<bsize>>esize);
last_high_band = 0; /* avoid warning */
for(j=0;j<n1;j++) {
n = s->exponent_high_bands[s->frame_len_bits -
float e2, v;
e2 = 0;
for(i = 0;i < n; i++) {
- v = exp_ptr[i];
+ v = exponents[i<<bsize>>esize];
e2 += v * v;
}
exp_power[j] = e2 / n;
last_high_band = j;
tprintf(s->avctx, "%d: power=%f (%d)\n", j, exp_power[j], n);
}
- exp_ptr += n;
+ exponents += n<<bsize>>esize;
}
/* main freqs and high freqs */
+ exponents = s->exponents[ch] + (s->coefs_start<<bsize>>esize);
for(j=-1;j<n1;j++) {
if (j < 0) {
n = s->high_band_start[bsize] -
for(i = 0;i < n; i++) {
noise = s->noise_table[s->noise_index];
s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
- *coefs++ = (*exponents++) * noise * mult1;
+ *coefs++ = noise *
+ exponents[i<<bsize>>esize] * mult1;
}
+ exponents += n<<bsize>>esize;
} else {
/* coded values + small noise */
for(i = 0;i < n; i++) {
noise = s->noise_table[s->noise_index];
s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
- *coefs++ = ((*coefs1++) + noise) * (*exponents++) * mult;
+ *coefs++ = ((*coefs1++) + noise) *
+ exponents[i<<bsize>>esize] * mult;
}
+ exponents += n<<bsize>>esize;
}
}
/* very high freqs : noise */
n = s->block_len - s->coefs_end[bsize];
- mult1 = mult * exponents[-1];
+ mult1 = mult * exponents[((-1<<bsize))>>esize];
for(i = 0; i < n; i++) {
*coefs++ = s->noise_table[s->noise_index] * mult1;
s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1);
*coefs++ = 0.0;
n = nb_coefs[ch];
for(i = 0;i < n; i++) {
- *coefs++ = coefs1[i] * exponents[i] * mult;
+ *coefs++ = coefs1[i] * exponents[i<<bsize>>esize] * mult;
}
n = s->block_len - s->coefs_end[bsize];
for(i = 0;i < n; i++)
#endif
if (s->ms_stereo && s->channel_coded[1]) {
- float a, b;
- int i;
-
/* nominal case for ms stereo: we do it before mdct */
/* no need to optimize this case because it should almost
never happen */
s->channel_coded[0] = 1;
}
- for(i = 0; i < s->block_len; i++) {
- a = s->coefs[0][i];
- b = s->coefs[1][i];
- s->coefs[0][i] = a + b;
- s->coefs[1][i] = a - b;
- }
+ s->dsp.butterflies_float(s->coefs[0], s->coefs[1], s->block_len);
}
- /* build the window : we ensure that when the windows overlap
- their squared sum is always 1 (MDCT reconstruction rule) */
- /* XXX: merge with output */
- {
- int i, next_block_len, block_len, prev_block_len, n;
- float *wptr;
-
- block_len = s->block_len;
- prev_block_len = 1 << s->prev_block_len_bits;
- next_block_len = 1 << s->next_block_len_bits;
-
- /* right part */
- wptr = s->window + block_len;
- if (block_len <= next_block_len) {
- for(i=0;i<block_len;i++)
- *wptr++ = s->windows[bsize][i];
- } else {
- /* overlap */
- n = (block_len / 2) - (next_block_len / 2);
- for(i=0;i<n;i++)
- *wptr++ = 1.0;
- for(i=0;i<next_block_len;i++)
- *wptr++ = s->windows[s->frame_len_bits - s->next_block_len_bits][i];
- for(i=0;i<n;i++)
- *wptr++ = 0.0;
- }
+next:
+ mdct = &s->mdct_ctx[bsize];
- /* left part */
- wptr = s->window + block_len;
- if (block_len <= prev_block_len) {
- for(i=0;i<block_len;i++)
- *--wptr = s->windows[bsize][i];
- } else {
- /* overlap */
- n = (block_len / 2) - (prev_block_len / 2);
- for(i=0;i<n;i++)
- *--wptr = 1.0;
- for(i=0;i<prev_block_len;i++)
- *--wptr = s->windows[s->frame_len_bits - s->prev_block_len_bits][i];
- for(i=0;i<n;i++)
- *--wptr = 0.0;
- }
- }
+ for(ch = 0; ch < s->nb_channels; ch++) {
+ int n4, index;
+ n4 = s->block_len / 2;
+ if(s->channel_coded[ch]){
+ mdct->imdct_calc(mdct, s->output, s->coefs[ch]);
+ }else if(!(s->ms_stereo && ch==1))
+ memset(s->output, 0, sizeof(s->output));
- for(ch = 0; ch < s->nb_channels; ch++) {
- if (s->channel_coded[ch]) {
- float *ptr;
- int n4, index, n;
-
- n = s->block_len;
- n4 = s->block_len / 2;
- s->mdct_ctx[bsize].fft.imdct_calc(&s->mdct_ctx[bsize],
- s->output, s->coefs[ch], s->mdct_tmp);
-
- /* XXX: optimize all that by build the window and
- multipying/adding at the same time */
-
- /* multiply by the window and add in the frame */
- index = (s->frame_len / 2) + s->block_pos - n4;
- ptr = &s->frame_out[ch][index];
- s->dsp.vector_fmul_add_add(ptr,s->window,s->output,ptr,0,2*n,1);
-
- /* specific fast case for ms-stereo : add to second
- channel if it is not coded */
- if (s->ms_stereo && !s->channel_coded[1]) {
- ptr = &s->frame_out[1][index];
- s->dsp.vector_fmul_add_add(ptr,s->window,s->output,ptr,0,2*n,1);
- }
- }
+ /* multiply by the window and add in the frame */
+ index = (s->frame_len / 2) + s->block_pos - n4;
+ wma_window(s, &s->frame_out[ch][index]);
}
- next:
+
/* update block number */
s->block_num++;
s->block_pos += s->block_len;
}
/* decode a frame of frame_len samples */
-static int wma_decode_frame(WMADecodeContext *s, int16_t *samples)
+static int wma_decode_frame(WMACodecContext *s, int16_t *samples)
{
- int ret, i, n, a, ch, incr;
- int16_t *ptr;
- float *iptr;
+ int ret, n, ch, incr;
+ const float *output[MAX_CHANNELS];
#ifdef TRACE
tprintf(s->avctx, "***decode_frame: %d size=%d\n", s->frame_count++, s->frame_len);
/* convert frame to integer */
n = s->frame_len;
incr = s->nb_channels;
- for(ch = 0; ch < s->nb_channels; ch++) {
- ptr = samples + ch;
- iptr = s->frame_out[ch];
-
- for(i=0;i<n;i++) {
- a = lrintf(*iptr++);
- if (a > 32767)
- a = 32767;
- else if (a < -32768)
- a = -32768;
- *ptr = a;
- ptr += incr;
- }
+ for (ch = 0; ch < MAX_CHANNELS; ch++)
+ output[ch] = s->frame_out[ch];
+ s->fmt_conv.float_to_int16_interleave(samples, output, n, incr);
+ for (ch = 0; ch < incr; ch++) {
/* prepare for next block */
- memmove(&s->frame_out[ch][0], &s->frame_out[ch][s->frame_len],
- s->frame_len * sizeof(float));
- /* XXX: suppress this */
- memset(&s->frame_out[ch][s->frame_len], 0,
- s->frame_len * sizeof(float));
+ memmove(&s->frame_out[ch][0], &s->frame_out[ch][n], n * sizeof(float));
}
#ifdef TRACE
return 0;
}
-static int wma_decode_superframe(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+static int wma_decode_superframe(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
- WMADecodeContext *s = avctx->priv_data;
- int nb_frames, bit_offset, i, pos, len;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ WMACodecContext *s = avctx->priv_data;
+ int nb_frames, bit_offset, i, pos, len, ret;
uint8_t *q;
int16_t *samples;
s->last_superframe_len = 0;
return 0;
}
-
- samples = data;
+ if (buf_size < s->block_align)
+ return 0;
+ buf_size = s->block_align;
init_get_bits(&s->gb, buf, buf_size*8);
if (s->use_bit_reservoir) {
/* read super frame header */
- get_bits(&s->gb, 4); /* super frame index */
- nb_frames = get_bits(&s->gb, 4) - 1;
+ skip_bits(&s->gb, 4); /* super frame index */
+ nb_frames = get_bits(&s->gb, 4) - (s->last_superframe_len <= 0);
+ } else {
+ nb_frames = 1;
+ }
+ /* get output buffer */
+ s->frame.nb_samples = nb_frames * s->frame_len;
+ if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ samples = (int16_t *)s->frame.data[0];
+
+ if (s->use_bit_reservoir) {
bit_offset = get_bits(&s->gb, s->byte_offset_bits + 3);
if (s->last_superframe_len > 0) {
if (wma_decode_frame(s, samples) < 0)
goto fail;
samples += s->nb_channels * s->frame_len;
+ nb_frames--;
}
/* read each frame starting from bit_offset */
pos = bit_offset + 4 + 4 + s->byte_offset_bits + 3;
+ if (pos >= MAX_CODED_SUPERFRAME_SIZE * 8)
+ return AVERROR_INVALIDDATA;
init_get_bits(&s->gb, buf + (pos >> 3), (MAX_CODED_SUPERFRAME_SIZE - (pos >> 3))*8);
len = pos & 7;
if (len > 0)
pos >>= 3;
len = buf_size - pos;
if (len > MAX_CODED_SUPERFRAME_SIZE || len < 0) {
+ av_log(s->avctx, AV_LOG_ERROR, "len %d invalid\n", len);
goto fail;
}
s->last_superframe_len = len;
//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d outbytes:%d eaten:%d\n", s->frame_len_bits, s->block_len_bits, s->frame_len, s->block_len, (int8_t *)samples - (int8_t *)data, s->block_align);
- *data_size = (int8_t *)samples - (int8_t *)data;
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = s->frame;
+
return s->block_align;
fail:
/* when error, we reset the bit reservoir */
return -1;
}
-AVCodec wmav1_decoder =
+static av_cold void flush(AVCodecContext *avctx)
{
- "wmav1",
- CODEC_TYPE_AUDIO,
- CODEC_ID_WMAV1,
- sizeof(WMADecodeContext),
- wma_decode_init,
- NULL,
- ff_wma_end,
- wma_decode_superframe,
+ WMACodecContext *s = avctx->priv_data;
+
+ s->last_bitoffset=
+ s->last_superframe_len= 0;
+}
+
+AVCodec ff_wmav1_decoder = {
+ .name = "wmav1",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_WMAV1,
+ .priv_data_size = sizeof(WMACodecContext),
+ .init = wma_decode_init,
+ .close = ff_wma_end,
+ .decode = wma_decode_superframe,
+ .flush = flush,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"),
};
-AVCodec wmav2_decoder =
-{
- "wmav2",
- CODEC_TYPE_AUDIO,
- CODEC_ID_WMAV2,
- sizeof(WMADecodeContext),
- wma_decode_init,
- NULL,
- ff_wma_end,
- wma_decode_superframe,
+AVCodec ff_wmav2_decoder = {
+ .name = "wmav2",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_WMAV2,
+ .priv_data_size = sizeof(WMACodecContext),
+ .init = wma_decode_init,
+ .close = ff_wma_end,
+ .decode = wma_decode_superframe,
+ .flush = flush,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"),
};