FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/wma.c	Lines:	223	262	85.1 %
Date:	2020-08-14 10:39:37	Branches:	126	168	75.0 %


/*
 * 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 "libavutil/attributes.h"

#include "avcodec.h"
#include "internal.h"
#include "sinewin.h"
#include "wma.h"
#include "wma_common.h"
#include "wma_freqs.h"
#include "wmadata.h"

/* XXX: use same run/length optimization as mpeg decoders */
// FIXME maybe split decode / encode or pass flag
static av_cold int 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;
    const uint32_t *table_codes  = vlc_table->huffcodes;
    const uint16_t *levels_table = vlc_table->levels;
    uint16_t *run_table, *level_table, *int_table;
    float *flevel_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_array(n, sizeof(uint16_t));
    level_table  = av_malloc_array(n, sizeof(uint16_t));
    flevel_table = av_malloc_array(n, sizeof(*flevel_table));
    int_table    = av_malloc_array(n, sizeof(uint16_t));
    if (!run_table || !level_table || !flevel_table || !int_table) {
        av_freep(&run_table);
        av_freep(&level_table);
        av_freep(&flevel_table);
        av_freep(&int_table);
        return AVERROR(ENOMEM);
    }
    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;
            flevel_table[i] = level;
            i++;
        }
        level++;
    }
    *prun_table   = run_table;
    *plevel_table = flevel_table;
    *pint_table   = int_table;
    av_free(level_table);

    return 0;
}

av_cold int ff_wma_init(AVCodecContext *avctx, int flags2)
{
    WMACodecContext *s = avctx->priv_data;
    int i, ret;
    float bps1, high_freq;
    volatile float bps;
    int sample_rate1;
    int coef_vlc_table;

    if (avctx->sample_rate <= 0 || avctx->sample_rate > 50000 ||
        avctx->channels    <= 0 || avctx->channels    > 2     ||
        avctx->bit_rate    <= 0)
        return -1;


    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(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 ((avctx->bit_rate / avctx->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           = avctx->sample_rate * 0.5;

    /* if version 2, then the rates are normalized */
    sample_rate1 = avctx->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) 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;
    if (s->byte_offset_bits + 3 > MIN_CACHE_BITS) {
        av_log(avctx, AV_LOG_ERROR, "byte_offset_bits %d is too large\n", s->byte_offset_bits);
        return AVERROR_PATCHWELCOME;
    }

    /* compute high frequency value and choose if noise coding should
     * be activated */
    bps1 = bps;
    if (avctx->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;
    }
    ff_dlog(s->avctx, "flags2=0x%x\n", flags2);
    ff_dlog(s->avctx, "version=%d channels=%d sample_rate=%d bitrate=%"PRId64" block_align=%d\n",
            s->version, avctx->channels, avctx->sample_rate, avctx->bit_rate,
            avctx->block_align);
    ff_dlog(s->avctx, "bps=%f bps1=%f high_freq=%f bitoffset=%d\n",
            bps, bps1, high_freq, s->byte_offset_bits);
    ff_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 */
    {
        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   = ff_wma_critical_freqs[i];
                    b   = avctx->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 (avctx->sample_rate >= 44100)
                        table = exponent_band_44100[a];
                    else if (avctx->sample_rate >= 32000)
                        table = exponent_band_32000[a];
                    else if (avctx->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     = ff_wma_critical_freqs[i];
                        b     = avctx->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) /
                                           avctx->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;
        }
    }

#ifdef TRACE
    {
        int i, j;
        for (i = 0; i < s->nb_block_sizes; i++) {
            ff_tlog(s->avctx, "%5d: n=%2d:",
                    s->frame_len >> i,
                    s->exponent_sizes[i]);
            for (j = 0; j < s->exponent_sizes[i]; j++)
                ff_tlog(s->avctx, " %d", s->exponent_bands[i][j]);
            ff_tlog(s->avctx, "\n");
        }
    }
#endif /* TRACE */

    /* 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];
    }

    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 /* TRACE */
    }

    s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
    if (!s->fdsp)
        return AVERROR(ENOMEM);

    /* choose the VLC tables for the coefficients */
    coef_vlc_table = 2;
    if (avctx->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];
    ret = init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0],
                        &s->int_table[0], s->coef_vlcs[0]);
    if (ret < 0)
        return ret;

    return init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1],
                         &s->int_table[1], s->coef_vlcs[1]);
}

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]);

    if (s->use_exp_vlc)
        ff_free_vlc(&s->exp_vlc);
    if (s->use_noise_coding)
        ff_free_vlc(&s->hgain_vlc);
    for (i = 0; i < 2; i++) {
        ff_free_vlc(&s->coef_vlc[i]);
        av_freep(&s->run_table[i]);
        av_freep(&s->level_table[i]);
        av_freep(&s->int_table[i]);
    }
    av_freep(&s->fdsp);

    return 0;
}

/**
 * Decode an uncompressed coefficient.
 * @param gb GetBitContext
 * @return the decoded coefficient
 */
unsigned int ff_wma_get_large_val(GetBitContext *gb)
{
    /** consumes up to 34 bits */
    int n_bits = 8;
    /** decode length */
    if (get_bits1(gb)) {
        n_bits += 8;
        if (get_bits1(gb)) {
            n_bits += 8;
            if (get_bits1(gb))
                n_bits += 7;
        }
    }
    return get_bits_long(gb, n_bits);
}

/**
 * Decode run level compressed coefficients.
 * @param avctx codec context
 * @param gb bitstream reader context
 * @param vlc vlc table for get_vlc2
 * @param level_table level codes
 * @param run_table run codes
 * @param version 0 for wma1,2 1 for wmapro
 * @param ptr output buffer
 * @param offset offset in the output buffer
 * @param num_coefs number of input coefficients
 * @param block_len input buffer length (2^n)
 * @param frame_len_bits number of bits for escaped run codes
 * @param coef_nb_bits number of bits for escaped level codes
 * @return 0 on success, -1 otherwise
 */
int ff_wma_run_level_decode(AVCodecContext *avctx, GetBitContext *gb,
                            VLC *vlc, const float *level_table,
                            const uint16_t *run_table, int version,
                            WMACoef *ptr, int offset, int num_coefs,
                            int block_len, int frame_len_bits,
                            int coef_nb_bits)
{
    int code, level, sign;
    const uint32_t *ilvl = (const uint32_t *) level_table;
    uint32_t *iptr = (uint32_t *) ptr;
    const unsigned int coef_mask = block_len - 1;
    for (; offset < num_coefs; offset++) {
        code = get_vlc2(gb, vlc->table, VLCBITS, VLCMAX);
        if (code > 1) {
            /** normal code */
            offset                  += run_table[code];
            sign                     = get_bits1(gb) - 1;
            iptr[offset & coef_mask] = ilvl[code] ^ (sign & 0x80000000);
        } else if (code == 1) {
            /** EOB */
            break;
        } else {
            /** escape */
            if (!version) {
                level = get_bits(gb, coef_nb_bits);
                /** NOTE: this is rather suboptimal. reading
                 *  block_len_bits would be better */
                offset += get_bits(gb, frame_len_bits);
            } else {
                level = ff_wma_get_large_val(gb);
                /** escape decode */
                if (get_bits1(gb)) {
                    if (get_bits1(gb)) {
                        if (get_bits1(gb)) {
                            av_log(avctx, AV_LOG_ERROR,
                                   "broken escape sequence\n");
                            return -1;
                        } else
                            offset += get_bits(gb, frame_len_bits) + 4;
                    } else
                        offset += get_bits(gb, 2) + 1;
                }
            }
            sign                    = get_bits1(gb) - 1;
            ptr[offset & coef_mask] = (level ^ sign) - sign;
        }
    }
    /** NOTE: EOB can be omitted */
    if (offset > num_coefs) {
        av_log(avctx, AV_LOG_ERROR,
               "overflow (%d > %d) in spectral RLE, ignoring\n",
               offset,
               num_coefs
              );
        return -1;
    }

    return 0;
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* WMA compatible codec
3			* Copyright (c) 2002-2007 The FFmpeg Project
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#include "libavutil/attributes.h"
23
24			#include "avcodec.h"
25			#include "internal.h"
26			#include "sinewin.h"
27			#include "wma.h"
28			#include "wma_common.h"
29			#include "wma_freqs.h"
30			#include "wmadata.h"
31
32			/* XXX: use same run/length optimization as mpeg decoders */
33			// FIXME maybe split decode / encode or pass flag
34		32	static av_cold int init_coef_vlc(VLC vlc, uint16_t *prun_table,
35			float plevel_table, uint16_t pint_table,
36			const CoefVLCTable *vlc_table)
37			{
38		32	int n = vlc_table->n;
39		32	const uint8_t *table_bits = vlc_table->huffbits;
40		32	const uint32_t *table_codes = vlc_table->huffcodes;
41		32	const uint16_t *levels_table = vlc_table->levels;
42			uint16_t run_table, level_table, *int_table;
43			float *flevel_table;
44			int i, l, j, k, level;
45
46		32	init_vlc(vlc, VLCBITS, n, table_bits, 1, 1, table_codes, 4, 4, 0);
47
48		32	run_table = av_malloc_array(n, sizeof(uint16_t));
49		32	level_table = av_malloc_array(n, sizeof(uint16_t));
50		32	flevel_table = av_malloc_array(n, sizeof(*flevel_table));
51		32	int_table = av_malloc_array(n, sizeof(uint16_t));
52	✓✗✓✗ ✓✗✗✓	32	if (!run_table \|\| !level_table \|\| !flevel_table \|\| !int_table) {
53			av_freep(&run_table);
54			av_freep(&level_table);
55			av_freep(&flevel_table);
56			av_freep(&int_table);
57			return AVERROR(ENOMEM);
58			}
59		32	i = 2;
60		32	level = 1;
61		32	k = 0;
62	✓✓	2612	while (i < n) {
63		2580	int_table[k] = i;
64		2580	l = levels_table[k++];
65	✓✓	20086	for (j = 0; j < l; j++) {
66		17506	run_table[i] = j;
67		17506	level_table[i] = level;
68		17506	flevel_table[i] = level;
69		17506	i++;
70			}
71		2580	level++;
72			}
73		32	*prun_table = run_table;
74		32	*plevel_table = flevel_table;
75		32	*pint_table = int_table;
76		32	av_free(level_table);
77
78		32	return 0;
79			}
80
81		16	av_cold int ff_wma_init(AVCodecContext *avctx, int flags2)
82			{
83		16	WMACodecContext *s = avctx->priv_data;
84			int i, ret;
85			float bps1, high_freq;
86			volatile float bps;
87			int sample_rate1;
88			int coef_vlc_table;
89
90	✓✗✓✗	16	if (avctx->sample_rate <= 0 \|\| avctx->sample_rate > 50000 \|\|
91	✓✗✓✗	16	avctx->channels <= 0 \|\| avctx->channels > 2 \|\|
92	✗✓	16	avctx->bit_rate <= 0)
93			return -1;
94
95
96	✓✓	16	if (avctx->codec->id == AV_CODEC_ID_WMAV1)
97		3	s->version = 1;
98			else
99		13	s->version = 2;
100
101			/* compute MDCT block size */
102		16	s->frame_len_bits = ff_wma_get_frame_len_bits(avctx->sample_rate,
103			s->version, 0);
104		16	s->next_block_len_bits = s->frame_len_bits;
105		16	s->prev_block_len_bits = s->frame_len_bits;
106		16	s->block_len_bits = s->frame_len_bits;
107
108		16	s->frame_len = 1 << s->frame_len_bits;
109	✓✓	16	if (s->use_variable_block_len) {
110			int nb_max, nb;
111		7	nb = ((flags2 >> 3) & 3) + 1;
112	✓✓	7	if ((avctx->bit_rate / avctx->channels) >= 32000)
113		4	nb += 2;
114		7	nb_max = s->frame_len_bits - BLOCK_MIN_BITS;
115	✗✓	7	if (nb > nb_max)
116			nb = nb_max;
117		7	s->nb_block_sizes = nb + 1;
118			} else
119		9	s->nb_block_sizes = 1;
120
121			/* init rate dependent parameters */
122		16	s->use_noise_coding = 1;
123		16	high_freq = avctx->sample_rate * 0.5;
124
125			/* if version 2, then the rates are normalized */
126		16	sample_rate1 = avctx->sample_rate;
127	✓✓	16	if (s->version == 2) {
128	✓✓	13	if (sample_rate1 >= 44100)
129		10	sample_rate1 = 44100;
130	✗✓	3	else if (sample_rate1 >= 22050)
131			sample_rate1 = 22050;
132	✓✓	3	else if (sample_rate1 >= 16000)
133		1	sample_rate1 = 16000;
134	✗✓	2	else if (sample_rate1 >= 11025)
135			sample_rate1 = 11025;
136	✓✗	2	else if (sample_rate1 >= 8000)
137		2	sample_rate1 = 8000;
138			}
139
140		16	bps = (float) avctx->bit_rate /
141		16	(float) (avctx->channels * avctx->sample_rate);
142		16	s->byte_offset_bits = av_log2((int) (bps * s->frame_len / 8.0 + 0.5)) + 2;
143	✗✓	16	if (s->byte_offset_bits + 3 > MIN_CACHE_BITS) {
144			av_log(avctx, AV_LOG_ERROR, "byte_offset_bits %d is too large\n", s->byte_offset_bits);
145			return AVERROR_PATCHWELCOME;
146			}
147
148			/* compute high frequency value and choose if noise coding should
149			* be activated */
150		16	bps1 = bps;
151	✓✓	16	if (avctx->channels == 2)
152		12	bps1 = bps * 1.6;
153	✓✓	16	if (sample_rate1 == 44100) {
154	✓✗	13	if (bps1 >= 0.61)
155		13	s->use_noise_coding = 0;
156			else
157			high_freq = high_freq * 0.4;
158	✗✓	3	} else if (sample_rate1 == 22050) {
159			if (bps1 >= 1.16)
160			s->use_noise_coding = 0;
161			else if (bps1 >= 0.72)
162			high_freq = high_freq * 0.7;
163			else
164			high_freq = high_freq * 0.6;
165	✓✓	3	} else if (sample_rate1 == 16000) {
166	✓✗	1	if (bps > 0.5)
167		1	high_freq = high_freq * 0.5;
168			else
169			high_freq = high_freq * 0.3;
170	✗✓	2	} else if (sample_rate1 == 11025)
171			high_freq = high_freq * 0.7;
172	✓✗	2	else if (sample_rate1 == 8000) {
173	✓✓	2	if (bps <= 0.625)
174		1	high_freq = high_freq * 0.5;
175	✓✗	1	else if (bps > 0.75)
176		1	s->use_noise_coding = 0;
177			else
178			high_freq = high_freq * 0.65;
179			} else {
180			if (bps >= 0.8)
181			high_freq = high_freq * 0.75;
182			else if (bps >= 0.6)
183			high_freq = high_freq * 0.6;
184			else
185			high_freq = high_freq * 0.5;
186			}
187			ff_dlog(s->avctx, "flags2=0x%x\n", flags2);
188			ff_dlog(s->avctx, "version=%d channels=%d sample_rate=%d bitrate=%"PRId64" block_align=%d\n",
189			s->version, avctx->channels, avctx->sample_rate, avctx->bit_rate,
190			avctx->block_align);
191			ff_dlog(s->avctx, "bps=%f bps1=%f high_freq=%f bitoffset=%d\n",
192			bps, bps1, high_freq, s->byte_offset_bits);
193			ff_dlog(s->avctx, "use_noise_coding=%d use_exp_vlc=%d nb_block_sizes=%d\n",
194			s->use_noise_coding, s->use_exp_vlc, s->nb_block_sizes);
195
196			/* compute the scale factor band sizes for each MDCT block size */
197			{
198			int a, b, pos, lpos, k, block_len, i, j, n;
199			const uint8_t *table;
200
201	✓✓	16	if (s->version == 1)
202		3	s->coefs_start = 3;
203			else
204		13	s->coefs_start = 0;
205	✓✓	55	for (k = 0; k < s->nb_block_sizes; k++) {
206		39	block_len = s->frame_len >> k;
207
208	✓✓	39	if (s->version == 1) {
209		3	lpos = 0;
210	✓✗	75	for (i = 0; i < 25; i++) {
211		75	a = ff_wma_critical_freqs[i];
212		75	b = avctx->sample_rate;
213		75	pos = ((block_len * 2 * a) + (b >> 1)) / b;
214	✓✓	75	if (pos > block_len)
215		3	pos = block_len;
216		75	s->exponent_bands[0][i] = pos - lpos;
217	✓✓	75	if (pos >= block_len) {
218		3	i++;
219		3	break;
220			}
221		72	lpos = pos;
222			}
223		3	s->exponent_sizes[0] = i;
224			} else {
225			/* hardcoded tables */
226		36	table = NULL;
227		36	a = s->frame_len_bits - BLOCK_MIN_BITS - k;
228	✓✓	36	if (a < 3) {
229	✓✓	21	if (avctx->sample_rate >= 44100)
230		15	table = exponent_band_44100[a];
231	✗✓	6	else if (avctx->sample_rate >= 32000)
232			table = exponent_band_32000[a];
233	✗✓	6	else if (avctx->sample_rate >= 22050)
234			table = exponent_band_22050[a];
235			}
236	✓✓	36	if (table) {
237		15	n = *table++;
238	✓✓	235	for (i = 0; i < n; i++)
239		220	s->exponent_bands[k][i] = table[i];
240		15	s->exponent_sizes[k] = n;
241			} else {
242		21	j = 0;
243		21	lpos = 0;
244	✓✗	495	for (i = 0; i < 25; i++) {
245		495	a = ff_wma_critical_freqs[i];
246		495	b = avctx->sample_rate;
247		495	pos = ((block_len * 2 * a) + (b << 1)) / (4 * b);
248		495	pos <<= 2;
249	✓✓	495	if (pos > block_len)
250		21	pos = block_len;
251	✓✓	495	if (pos > lpos)
252		489	s->exponent_bands[k][j++] = pos - lpos;
253	✓✓	495	if (pos >= block_len)
254		21	break;
255		474	lpos = pos;
256			}
257		21	s->exponent_sizes[k] = j;
258			}
259			}
260
261			/* max number of coefs */
262		39	s->coefs_end[k] = (s->frame_len - ((s->frame_len * 9) / 100)) >> k;
263			/* high freq computation */
264		39	s->high_band_start[k] = (int) ((block_len * 2 * high_freq) /
265		39	avctx->sample_rate + 0.5);
266		39	n = s->exponent_sizes[k];
267		39	j = 0;
268		39	pos = 0;
269	✓✓	823	for (i = 0; i < n; i++) {
270			int start, end;
271		784	start = pos;
272		784	pos += s->exponent_bands[k][i];
273		784	end = pos;
274	✓✓	784	if (start < s->high_band_start[k])
275		767	start = s->high_band_start[k];
276	✓✓	784	if (end > s->coefs_end[k])
277		45	end = s->coefs_end[k];
278	✓✓	784	if (end > start)
279		16	s->exponent_high_bands[k][j++] = end - start;
280			}
281		39	s->exponent_high_sizes[k] = j;
282			}
283			}
284
285			#ifdef TRACE
286			{
287			int i, j;
288			for (i = 0; i < s->nb_block_sizes; i++) {
289			ff_tlog(s->avctx, "%5d: n=%2d:",
290			s->frame_len >> i,
291			s->exponent_sizes[i]);
292			for (j = 0; j < s->exponent_sizes[i]; j++)
293			ff_tlog(s->avctx, " %d", s->exponent_bands[i][j]);
294			ff_tlog(s->avctx, "\n");
295			}
296			}
297			#endif /* TRACE */
298
299			/* init MDCT windows : simple sine window */
300	✓✓	55	for (i = 0; i < s->nb_block_sizes; i++) {
301		39	ff_init_ff_sine_windows(s->frame_len_bits - i);
302		39	s->windows[i] = ff_sine_windows[s->frame_len_bits - i];
303			}
304
305		16	s->reset_block_lengths = 1;
306
307	✓✓	16	if (s->use_noise_coding) {
308			/* init the noise generator */
309	✗✓	2	if (s->use_exp_vlc)
310			s->noise_mult = 0.02;
311			else
312		2	s->noise_mult = 0.04;
313
314			#ifdef TRACE
315			for (i = 0; i < NOISE_TAB_SIZE; i++)
316			s->noise_table[i] = 1.0 * s->noise_mult;
317			#else
318			{
319			unsigned int seed;
320			float norm;
321		2	seed = 1;
322		2	norm = (1.0 / (float) (1LL << 31)) * sqrt(3) * s->noise_mult;
323	✓✓	16386	for (i = 0; i < NOISE_TAB_SIZE; i++) {
324		16384	seed = seed * 314159 + 1;
325		16384	s->noise_table[i] = (float) ((int) seed) * norm;
326			}
327			}
328			#endif /* TRACE */
329			}
330
331		16	s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
332	✗✓	16	if (!s->fdsp)
333			return AVERROR(ENOMEM);
334
335			/* choose the VLC tables for the coefficients */
336		16	coef_vlc_table = 2;
337	✓✓	16	if (avctx->sample_rate >= 32000) {
338	✗✓	13	if (bps1 < 0.72)
339			coef_vlc_table = 0;
340	✓✓	13	else if (bps1 < 1.16)
341		2	coef_vlc_table = 1;
342			}
343		16	s->coef_vlcs[0] = &coef_vlcs[coef_vlc_table * 2];
344		16	s->coef_vlcs[1] = &coef_vlcs[coef_vlc_table * 2 + 1];
345		16	ret = init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0],
346			&s->int_table[0], s->coef_vlcs[0]);
347	✗✓	16	if (ret < 0)
348			return ret;
349
350		16	return init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1],
351			&s->int_table[1], s->coef_vlcs[1]);
352			}
353
354		3650	int ff_wma_total_gain_to_bits(int total_gain)
355			{
356	✗✓	3650	if (total_gain < 15)
357			return 13;
358	✓✓	3650	else if (total_gain < 32)
359		98	return 12;
360	✓✓	3552	else if (total_gain < 40)
361		284	return 11;
362	✓✓	3268	else if (total_gain < 45)
363		18	return 10;
364			else
365		3250	return 9;
366			}
367
368		16	int ff_wma_end(AVCodecContext *avctx)
369			{
370		16	WMACodecContext *s = avctx->priv_data;
371			int i;
372
373	✓✓	55	for (i = 0; i < s->nb_block_sizes; i++)
374		39	ff_mdct_end(&s->mdct_ctx[i]);
375
376	✓✓	16	if (s->use_exp_vlc)
377		13	ff_free_vlc(&s->exp_vlc);
378	✓✓	16	if (s->use_noise_coding)
379		2	ff_free_vlc(&s->hgain_vlc);
380	✓✓	48	for (i = 0; i < 2; i++) {
381		32	ff_free_vlc(&s->coef_vlc[i]);
382		32	av_freep(&s->run_table[i]);
383		32	av_freep(&s->level_table[i]);
384		32	av_freep(&s->int_table[i]);
385			}
386		16	av_freep(&s->fdsp);
387
388		16	return 0;
389			}
390
391			/**
392			* Decode an uncompressed coefficient.
393			* @param gb GetBitContext
394			* @return the decoded coefficient
395			*/
396		3915	unsigned int ff_wma_get_large_val(GetBitContext *gb)
397			{
398			/** consumes up to 34 bits */
399		3915	int n_bits = 8;
400			/** decode length */
401	✓✓	3915	if (get_bits1(gb)) {
402		530	n_bits += 8;
403	✗✓	530	if (get_bits1(gb)) {
404			n_bits += 8;
405			if (get_bits1(gb))
406			n_bits += 7;
407			}
408			}
409		3915	return get_bits_long(gb, n_bits);
410			}
411
412			/**
413			* Decode run level compressed coefficients.
414			* @param avctx codec context
415			* @param gb bitstream reader context
416			* @param vlc vlc table for get_vlc2
417			* @param level_table level codes
418			* @param run_table run codes
419			* @param version 0 for wma1,2 1 for wmapro
420			* @param ptr output buffer
421			* @param offset offset in the output buffer
422			* @param num_coefs number of input coefficients
423			* @param block_len input buffer length (2^n)
424			* @param frame_len_bits number of bits for escaped run codes
425			* @param coef_nb_bits number of bits for escaped level codes
426			* @return 0 on success, -1 otherwise
427			*/
428		2174	int ff_wma_run_level_decode(AVCodecContext avctx, GetBitContext gb,
429			VLC vlc, const float level_table,
430			const uint16_t *run_table, int version,
431			WMACoef *ptr, int offset, int num_coefs,
432			int block_len, int frame_len_bits,
433			int coef_nb_bits)
434			{
435			int code, level, sign;
436		2174	const uint32_t ilvl = (const uint32_t ) level_table;
437		2174	uint32_t iptr = (uint32_t ) ptr;
438		2174	const unsigned int coef_mask = block_len - 1;
439	✓✓	592299	for (; offset < num_coefs; offset++) {
440		592287	code = get_vlc2(gb, vlc->table, VLCBITS, VLCMAX);
441	✓✓	592287	if (code > 1) {
442			/** normal code */
443		586557	offset += run_table[code];
444		586557	sign = get_bits1(gb) - 1;
445		586557	iptr[offset & coef_mask] = ilvl[code] ^ (sign & 0x80000000);
446	✓✓	5730	} else if (code == 1) {
447			/** EOB */
448		2162	break;
449			} else {
450			/** escape */
451	✓✓	3568	if (!version) {
452		2926	level = get_bits(gb, coef_nb_bits);
453			/** NOTE: this is rather suboptimal. reading
454			* block_len_bits would be better */
455		2926	offset += get_bits(gb, frame_len_bits);
456			} else {
457		642	level = ff_wma_get_large_val(gb);
458			/** escape decode */
459	✓✓	642	if (get_bits1(gb)) {
460	✓✓	321	if (get_bits1(gb)) {
461	✗✓	263	if (get_bits1(gb)) {
462			av_log(avctx, AV_LOG_ERROR,
463			"broken escape sequence\n");
464			return -1;
465			} else
466		263	offset += get_bits(gb, frame_len_bits) + 4;
467			} else
468		58	offset += get_bits(gb, 2) + 1;
469			}
470			}
471		3568	sign = get_bits1(gb) - 1;
472		3568	ptr[offset & coef_mask] = (level ^ sign) - sign;
473			}
474			}
475			/** NOTE: EOB can be omitted */
476	✗✓	2174	if (offset > num_coefs) {
477			av_log(avctx, AV_LOG_ERROR,
478			"overflow (%d > %d) in spectral RLE, ignoring\n",
479			offset,
480			num_coefs
481			);
482			return -1;
483			}
484
485		2174	return 0;
486			}