X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fwmadec.c;h=a7300594ca3c2ba9f33bb8221f5985a2a4eb8100;hb=44dc9c6af0377faf2a99889d1f949e32a1102e84;hp=c0ed543d07db7612683dc4e6f2833d3e4c5b4162;hpb=52fa37f17c45010fe303607156070d5bb2f44082;p=ffmpeg diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c index c0ed543d07d..a7300594ca3 100644 --- a/libavcodec/wmadec.c +++ b/libavcodec/wmadec.c @@ -1,24 +1,26 @@ /* * WMA compatible decoder - * Copyright (c) 2002 The FFmpeg Project. + * Copyright (c) 2002 The Libav Project * - * This library is free software; you can redistribute it and/or + * This file is part of Libav. + * + * 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 of the License, or (at your option) any later version. + * version 2.1 of the License, or (at your option) any later version. * - * This library 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 this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * 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 @@ -32,529 +34,110 @@ */ #include "avcodec.h" -#include "bitstream.h" -#include "dsputil.h" - -/* size of blocks */ -#define BLOCK_MIN_BITS 7 -#define BLOCK_MAX_BITS 11 -#define BLOCK_MAX_SIZE (1 << BLOCK_MAX_BITS) - -#define BLOCK_NB_SIZES (BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1) - -/* XXX: find exact max size */ -#define HIGH_BAND_MAX_SIZE 16 - -#define NB_LSP_COEFS 10 - -/* XXX: is it a suitable value ? */ -#define MAX_CODED_SUPERFRAME_SIZE 16384 - -#define MAX_CHANNELS 2 - -#define NOISE_TAB_SIZE 8192 - -#define LSP_POW_BITS 7 - -#define VLCBITS 9 - -typedef struct WMADecodeContext { - GetBitContext gb; - int sample_rate; - int nb_channels; - int bit_rate; - int version; /* 1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2) */ - int block_align; - int use_bit_reservoir; - int use_variable_block_len; - int use_exp_vlc; /* exponent coding: 0 = lsp, 1 = vlc + delta */ - int use_noise_coding; /* true if perceptual noise is added */ - int byte_offset_bits; - VLC exp_vlc; - int exponent_sizes[BLOCK_NB_SIZES]; - uint16_t exponent_bands[BLOCK_NB_SIZES][25]; - int high_band_start[BLOCK_NB_SIZES]; /* index of first coef in high band */ - int coefs_start; /* first coded coef */ - int coefs_end[BLOCK_NB_SIZES]; /* max number of coded coefficients */ - int exponent_high_sizes[BLOCK_NB_SIZES]; - int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]; - VLC hgain_vlc; - - /* coded values in high bands */ - int high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]; - int high_band_values[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]; - - /* there are two possible tables for spectral coefficients */ - VLC coef_vlc[2]; - uint16_t *run_table[2]; - uint16_t *level_table[2]; - /* frame info */ - int frame_len; /* frame length in samples */ - int frame_len_bits; /* frame_len = 1 << frame_len_bits */ - int nb_block_sizes; /* number of block sizes */ - /* block info */ - int reset_block_lengths; - int block_len_bits; /* log2 of current block length */ - int next_block_len_bits; /* log2 of next block length */ - int prev_block_len_bits; /* log2 of prev block length */ - int block_len; /* block length in samples */ - int block_num; /* block number in current frame */ - int block_pos; /* current position in frame */ - uint8_t ms_stereo; /* true if mid/side stereo mode */ - uint8_t channel_coded[MAX_CHANNELS]; /* true if channel is coded */ - float exponents[MAX_CHANNELS][BLOCK_MAX_SIZE] __attribute__((aligned(16))); - float max_exponent[MAX_CHANNELS]; - int16_t coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE]; - float coefs[MAX_CHANNELS][BLOCK_MAX_SIZE] __attribute__((aligned(16))); - MDCTContext mdct_ctx[BLOCK_NB_SIZES]; - float *windows[BLOCK_NB_SIZES]; - FFTSample mdct_tmp[BLOCK_MAX_SIZE] __attribute__((aligned(16))); /* temporary storage for imdct */ - /* output buffer for one frame and the last for IMDCT windowing */ - float frame_out[MAX_CHANNELS][BLOCK_MAX_SIZE * 2] __attribute__((aligned(16))); - /* last frame info */ - uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + 4]; /* padding added */ - int last_bitoffset; - int last_superframe_len; - float noise_table[NOISE_TAB_SIZE]; - int noise_index; - float noise_mult; /* XXX: suppress that and integrate it in the noise array */ - /* lsp_to_curve tables */ - float lsp_cos_table[BLOCK_MAX_SIZE]; - float lsp_pow_e_table[256]; - float lsp_pow_m_table1[(1 << LSP_POW_BITS)]; - float lsp_pow_m_table2[(1 << LSP_POW_BITS)]; +#include "wma.h" -#ifdef TRACE - int frame_count; -#endif -} WMADecodeContext; +#undef NDEBUG +#include -typedef struct CoefVLCTable { - int n; /* total number of codes */ - const uint32_t *huffcodes; /* VLC bit values */ - const uint8_t *huffbits; /* VLC bit size */ - const uint16_t *levels; /* table to build run/level tables */ -} CoefVLCTable; +#define EXPVLCBITS 8 +#define EXPMAX ((19+EXPVLCBITS-1)/EXPVLCBITS) -static void wma_lsp_to_curve_init(WMADecodeContext *s, int frame_len); +#define HGAINVLCBITS 9 +#define HGAINMAX ((13+HGAINVLCBITS-1)/HGAINVLCBITS) -#include "wmadata.h" +static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len); #ifdef TRACE -static void dump_shorts(const char *name, const short *tab, int n) +static void dump_shorts(WMACodecContext *s, const char *name, const short *tab, int n) { int i; - tprintf("%s[%d]:\n", name, n); + tprintf(s->avctx, "%s[%d]:\n", name, n); for(i=0;iavctx, "%4d: ", i); + tprintf(s->avctx, " %5d.0", tab[i]); if ((i & 7) == 7) - tprintf("\n"); + tprintf(s->avctx, "\n"); } } -static void dump_floats(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; - tprintf("%s[%d]:\n", name, n); + tprintf(s->avctx, "%s[%d]:\n", name, n); for(i=0;iavctx, "%4d: ", i); + tprintf(s->avctx, " %8.*f", prec, tab[i]); if ((i & 7) == 7) - tprintf("\n"); + tprintf(s->avctx, "\n"); } if ((i & 7) != 0) - tprintf("\n"); + tprintf(s->avctx, "\n"); } #endif -/* XXX: use same run/length optimization as mpeg decoders */ -static void init_coef_vlc(VLC *vlc, - uint16_t **prun_table, uint16_t **plevel_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; - const uint16_t *p; - int i, l, j, level; - - init_vlc(vlc, 9, 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)); - p = levels_table; - i = 2; - level = 1; - while (i < n) { - l = *p++; - for(j=0;jpriv_data; - int i, flags1, flags2; - float *window; + WMACodecContext *s = avctx->priv_data; + int i, flags2; uint8_t *extradata; - 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; - - if (avctx->codec->id == CODEC_ID_WMAV1) { - s->version = 1; - } else { - s->version = 2; - } + + s->avctx = avctx; /* extract flag infos */ - flags1 = 0; flags2 = 0; extradata = avctx->extradata; - if (s->version == 1 && avctx->extradata_size >= 4) { - flags1 = extradata[0] | (extradata[1] << 8); - flags2 = extradata[2] | (extradata[3] << 8); - } else if (s->version == 2 && avctx->extradata_size >= 6) { - flags1 = extradata[0] | (extradata[1] << 8) | - (extradata[2] << 16) | (extradata[3] << 24); - flags2 = extradata[4] | (extradata[5] << 8); + if (avctx->codec->id == CODEC_ID_WMAV1 && avctx->extradata_size >= 4) { + flags2 = AV_RL16(extradata+2); + } else if (avctx->codec->id == CODEC_ID_WMAV2 && avctx->extradata_size >= 6) { + flags2 = AV_RL16(extradata+4); } +// for(i=0; iextradata_size; i++) +// av_log(NULL, AV_LOG_ERROR, "%02X ", extradata[i]); + s->use_exp_vlc = flags2 & 0x0001; s->use_bit_reservoir = flags2 & 0x0002; s->use_variable_block_len = flags2 & 0x0004; - /* 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 dependant 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("flags1=0x%x flags2=0x%x\n", flags1, flags2); - dprintf("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("bps=%f bps1=%f high_freq=%f bitoffset=%d\n", - bps, bps1, high_freq, s->byte_offset_bits); - dprintf("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;iexponent_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;iexponent_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("%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;jexponent_high_sizes[k];j++) - tprintf(" %d", s->exponent_high_bands[k][j]); - tprintf("\n"); -#endif - } - } - -#ifdef TRACE - { - int i, j; - for(i = 0; i < s->nb_block_sizes; i++) { - tprintf("%5d: n=%2d:", - s->frame_len >> i, - s->exponent_sizes[i]); - for(j=0;jexponent_sizes[i];j++) - tprintf(" %d", s->exponent_bands[i][j]); - tprintf("\n"); - } - } -#endif + 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); - - /* 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;jwindows[i] = window; - } - - s->reset_block_lengths = 1; + ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 1, 1.0); 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;inoise_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;inoise_table[i] = (float)((int)seed) * norm; - } - } -#endif - init_vlc(&s->hgain_vlc, 9, sizeof(hgain_huffbits), - hgain_huffbits, 1, 1, - hgain_huffcodes, 2, 2, 0); + init_vlc(&s->hgain_vlc, HGAINVLCBITS, sizeof(ff_wma_hgain_huffbits), + ff_wma_hgain_huffbits, 1, 1, + ff_wma_hgain_huffcodes, 2, 2, 0); } if (s->use_exp_vlc) { - init_vlc(&s->exp_vlc, 9, sizeof(scale_huffbits), - scale_huffbits, 1, 1, - 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); } - /* 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; - } + avctx->sample_fmt = AV_SAMPLE_FMT_S16; - init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0], - &coef_vlcs[coef_vlc_table * 2]); - init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1], - &coef_vlcs[coef_vlc_table * 2 + 1]); - return 0; -} + avcodec_get_frame_defaults(&s->frame); + avctx->coded_frame = &s->frame; -/* 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; - } - } + return 0; } -/* compute x^-0.25 with an exponent and mantissa table. We use linear - interpolation to reduce the mantissa table size at a small speed - expense (linear interpolation approximately doubles the number of - bits of precision). */ -static inline float pow_m1_4(WMADecodeContext *s, float x) +/** + * compute x^-0.25 with an exponent and mantissa table. We use linear + * interpolation to reduce the mantissa table size at a small speed + * expense (linear interpolation approximately doubles the number of + * bits of precision). + */ +static inline float pow_m1_4(WMACodecContext *s, float x) { union { float f; @@ -573,7 +156,7 @@ static inline float pow_m1_4(WMADecodeContext *s, float x) 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; @@ -599,20 +182,13 @@ static void wma_lsp_to_curve_init(WMADecodeContext *s, int frame_len) 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 */ -/* XXX: optimize it further with SSE/3Dnow */ -static void wma_lsp_to_curve(WMADecodeContext *s, +/** + * NOTE: We use the same code as Vorbis here + * @todo optimize it further with SSE/3Dnow + */ +static void wma_lsp_to_curve(WMACodecContext *s, float *out, float *val_max_ptr, int n, float *lsp) { @@ -639,8 +215,10 @@ static void wma_lsp_to_curve(WMADecodeContext *s, *val_max_ptr = val_max; } -/* decode exponents coded with LSP coefficients (same idea as Vorbis) */ -static void decode_exp_lsp(WMADecodeContext *s, int ch) +/** + * decode exponents coded with LSP coefficients (same idea as Vorbis) + */ +static void decode_exp_lsp(WMACodecContext *s, int ch) { float lsp_coefs[NB_LSP_COEFS]; int val, i; @@ -650,72 +228,224 @@ static void decode_exp_lsp(WMADecodeContext *s, int ch) val = get_bits(&s->gb, 3); else val = get_bits(&s->gb, 4); - lsp_coefs[i] = lsp_codebook[i][val]; + lsp_coefs[i] = ff_wma_lsp_codebook[i][val]; } wma_lsp_to_curve(s, s->exponents[ch], &s->max_exponent[ch], s->block_len, lsp_coefs); } -/* decode exponents coded with VLC codes */ -static int decode_exp_vlc(WMADecodeContext *s, int ch) +/** 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(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); - } - last_exp = 36; + 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, VLCBITS, 2); - if (code < 0) + code = get_vlc2(&s->gb, s->exp_vlc.table, EXPVLCBITS, EXPMAX); + 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; } -/* return 0 if OK. return 1 if last block of frame. return -1 if - unrecorrable error. */ -static int wma_decode_block(WMADecodeContext *s) + +/** + * 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(WMACodecContext *s) { - int n, v, a, ch, code, bsize; - int coef_nb_bits, total_gain, parse_exponents; - float window[BLOCK_MAX_SIZE * 2]; -// XXX: FIXME!! there's a bug somewhere which makes this mandatory under altivec -#ifdef HAVE_ALTIVEC - volatile int nb_coefs[MAX_CHANNELS] __attribute__((aligned(16))); -#else + int n, v, a, ch, bsize; + int coef_nb_bits, total_gain; int nb_coefs[MAX_CHANNELS]; -#endif float mdct_norm; + FFTContext *mdct; #ifdef TRACE - tprintf("***decode_block: %d:%d\n", s->frame_count - 1, s->block_num); + tprintf(s->avctx, "***decode_block: %d:%d\n", s->frame_count - 1, s->block_num); #endif /* compute current block length */ @@ -725,12 +455,16 @@ static int wma_decode_block(WMADecodeContext *s) 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 */ @@ -738,8 +472,10 @@ static int wma_decode_block(WMADecodeContext *s) 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 */ @@ -750,25 +486,28 @@ static int wma_decode_block(WMADecodeContext *s) /* 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; @@ -779,16 +518,7 @@ static int wma_decode_block(WMADecodeContext *s) break; } - if (total_gain < 15) - coef_nb_bits = 13; - else if (total_gain < 32) - coef_nb_bits = 12; - else if (total_gain < 40) - coef_nb_bits = 11; - else if (total_gain < 45) - coef_nb_bits = 10; - else - coef_nb_bits = 9; + coef_nb_bits= ff_wma_total_gain_to_bits(total_gain); /* compute number of coefficients */ n = s->coefs_end[bsize] - s->coefs_start; @@ -803,7 +533,7 @@ static int wma_decode_block(WMADecodeContext *s) int i, n, a; n = s->exponent_high_sizes[bsize]; for(i=0;igb, 1); + a = get_bits1(&s->gb); s->high_band_coded[ch][i] = a; /* if noise coding, the coefficients are not transmitted */ if (a) @@ -822,9 +552,11 @@ static int wma_decode_block(WMADecodeContext *s) if (val == (int)0x80000000) { val = get_bits(&s->gb, 7) - 19; } else { - code = get_vlc2(&s->gb, s->hgain_vlc.table, VLCBITS, 2); - if (code < 0) + code = get_vlc2(&s->gb, s->hgain_vlc.table, HGAINVLCBITS, HGAINMAX); + 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; @@ -834,13 +566,9 @@ static int wma_decode_block(WMADecodeContext *s) } } - /* 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) { @@ -849,13 +577,7 @@ static int wma_decode_block(WMADecodeContext *s) } 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; } } } @@ -863,50 +585,17 @@ static int wma_decode_block(WMADecodeContext *s) /* 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 int16_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, 3); - 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) - return -1; - *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); @@ -925,13 +614,14 @@ static int wma_decode_block(WMADecodeContext *s) /* 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]; @@ -939,16 +629,16 @@ static int wma_decode_block(WMADecodeContext *s) 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<>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]<>esize); last_high_band = 0; /* avoid warning */ for(j=0;jexponent_high_bands[s->frame_len_bits - @@ -957,17 +647,18 @@ static int wma_decode_block(WMADecodeContext *s) float e2, v; e2 = 0; for(i = 0;i < n; i++) { - v = exp_ptr[i]; + v = exponents[i<>esize]; e2 += v * v; } exp_power[j] = e2 / n; last_high_band = j; - tprintf("%d: power=%f (%d)\n", j, exp_power[j], n); + tprintf(s->avctx, "%d: power=%f (%d)\n", j, exp_power[j], n); } - exp_ptr += n; + exponents += n<>esize; } /* main freqs and high freqs */ + exponents = s->exponents[ch] + (s->coefs_start<>esize); for(j=-1;jhigh_band_start[bsize] - @@ -986,21 +677,25 @@ static int wma_decode_block(WMADecodeContext *s) 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<>esize] * mult1; } + exponents += n<>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<>esize] * mult; } + exponents += n<>esize; } } /* very high freqs : noise */ n = s->block_len - s->coefs_end[bsize]; - mult1 = mult * exponents[-1]; + mult1 = mult * exponents[((-1<>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); @@ -1011,7 +706,7 @@ static int wma_decode_block(WMADecodeContext *s) *coefs++ = 0.0; n = nb_coefs[ch]; for(i = 0;i < n; i++) { - *coefs++ = coefs1[i] * exponents[i] * mult; + *coefs++ = coefs1[i] * exponents[i<>esize] * mult; } n = s->block_len - s->coefs_end[bsize]; for(i = 0;i < n; i++) @@ -1023,116 +718,42 @@ static int wma_decode_block(WMADecodeContext *s) #ifdef TRACE for(ch = 0; ch < s->nb_channels; ch++) { if (s->channel_coded[ch]) { - dump_floats("exponents", 3, s->exponents[ch], s->block_len); - dump_floats("coefs", 1, s->coefs[ch], s->block_len); + dump_floats(s, "exponents", 3, s->exponents[ch], s->block_len); + dump_floats(s, "coefs", 1, s->coefs[ch], s->block_len); } } #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 */ if (!s->channel_coded[0]) { - tprintf("rare ms-stereo case happened\n"); + tprintf(s->avctx, "rare ms-stereo case happened\n"); memset(s->coefs[0], 0, sizeof(float) * s->block_len); 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; - } - } - - /* 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 = window + block_len; - if (block_len <= next_block_len) { - for(i=0;iwindows[bsize][i]; - } else { - /* overlap */ - n = (block_len / 2) - (next_block_len / 2); - for(i=0;iwindows[s->frame_len_bits - s->next_block_len_bits][i]; - for(i=0;iwindows[bsize][i]; - } else { - /* overlap */ - n = (block_len / 2) - (prev_block_len / 2); - for(i=0;iwindows[s->frame_len_bits - s->prev_block_len_bits][i]; - for(i=0;idsp.butterflies_float(s->coefs[0], s->coefs[1], s->block_len); } +next: + mdct = &s->mdct_ctx[bsize]; for(ch = 0; ch < s->nb_channels; ch++) { - if (s->channel_coded[ch]) { - FFTSample output[BLOCK_MAX_SIZE * 2] __attribute__((aligned(16))); - float *ptr; - int i, n4, index, n; - - n = s->block_len; - n4 = s->block_len / 2; - ff_imdct_calc(&s->mdct_ctx[bsize], - 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 */ - for(i=0;iframe_len / 2) + s->block_pos - n4; - ptr = &s->frame_out[ch][index]; - for(i=0;iblock_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)); - /* 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]; - for(i=0;iframe_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; @@ -1143,14 +764,13 @@ static int wma_decode_block(WMADecodeContext *s) } /* 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("***decode_frame: %d size=%d\n", s->frame_count++, s->frame_len); + tprintf(s->avctx, "***decode_frame: %d size=%d\n", s->frame_count++, s->frame_len); #endif /* read each block */ @@ -1167,59 +787,70 @@ static int wma_decode_frame(WMADecodeContext *s, int16_t *samples) /* 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 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 - dump_shorts("samples", samples, n * s->nb_channels); + dump_shorts(s, "samples", samples, n * s->nb_channels); #endif 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; - tprintf("***decode_superframe:\n"); + tprintf(avctx, "***decode_superframe:\n"); if(buf_size==0){ s->last_superframe_len = 0; return 0; } - - samples = data; + if (buf_size < s->block_align) { + av_log(avctx, AV_LOG_ERROR, + "Input packet size too small (%d < %d)\n", + buf_size, s->block_align); + return AVERROR_INVALIDDATA; + } + 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 (bit_offset > get_bits_left(&s->gb)) { + av_log(avctx, AV_LOG_ERROR, + "Invalid last frame bit offset %d > buf size %d (%d)\n", + bit_offset, get_bits_left(&s->gb), buf_size); + goto fail; + } if (s->last_superframe_len > 0) { // printf("skip=%d\n", s->last_bitoffset); @@ -1229,16 +860,17 @@ static int wma_decode_superframe(AVCodecContext *avctx, goto fail; q = s->last_superframe + s->last_superframe_len; len = bit_offset; - while (len > 0) { + while (len > 7) { *q++ = (get_bits)(&s->gb, 8); len -= 8; } if (len > 0) { *q++ = (get_bits)(&s->gb, len) << (8 - len); } + memset(q, 0, FF_INPUT_BUFFER_PADDING_SIZE); /* XXX: bit_offset bits into last frame */ - init_get_bits(&s->gb, s->last_superframe, MAX_CODED_SUPERFRAME_SIZE*8); + init_get_bits(&s->gb, s->last_superframe, s->last_superframe_len * 8 + bit_offset); /* skip unused bits */ if (s->last_bitoffset > 0) skip_bits(&s->gb, s->last_bitoffset); @@ -1247,11 +879,14 @@ static int wma_decode_superframe(AVCodecContext *avctx, 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; - init_get_bits(&s->gb, buf + (pos >> 3), (MAX_CODED_SUPERFRAME_SIZE - (pos >> 3))*8); + if (pos >= MAX_CODED_SUPERFRAME_SIZE * 8 || pos > buf_size * 8) + return AVERROR_INVALIDDATA; + init_get_bits(&s->gb, buf + (pos >> 3), (buf_size - (pos >> 3))*8); len = pos & 7; if (len > 0) skip_bits(&s->gb, len); @@ -1269,6 +904,7 @@ static int wma_decode_superframe(AVCodecContext *avctx, 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; @@ -1279,7 +915,12 @@ static int wma_decode_superframe(AVCodecContext *avctx, goto fail; samples += s->nb_channels * s->frame_len; } - *data_size = (int8_t *)samples - (int8_t *)data; + +//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); + + *got_frame_ptr = 1; + *(AVFrame *)data = s->frame; + return s->block_align; fail: /* when error, we reset the bit reservoir */ @@ -1287,51 +928,36 @@ static int wma_decode_superframe(AVCodecContext *avctx, return -1; } -static int wma_decode_end(AVCodecContext *avctx) +static av_cold void flush(AVCodecContext *avctx) { - WMADecodeContext *s = avctx->priv_data; - int i; + WMACodecContext *s = avctx->priv_data; - 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; + s->last_bitoffset= + s->last_superframe_len= 0; } -AVCodec wmav1_decoder = -{ - "wmav1", - CODEC_TYPE_AUDIO, - CODEC_ID_WMAV1, - sizeof(WMADecodeContext), - wma_decode_init, - NULL, - wma_decode_end, - wma_decode_superframe, +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, - wma_decode_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"), };