FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/truespeech.c	Lines:	181	186	97.3 %
Date:	2021-04-14 23:45:22	Branches:	69	72	95.8 %


/*
 * DSP Group TrueSpeech compatible decoder
 * Copyright (c) 2005 Konstantin Shishkov
 *
 * 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/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem_internal.h"

#include "avcodec.h"
#include "bswapdsp.h"
#include "get_bits.h"
#include "internal.h"

#include "truespeech_data.h"
/**
 * @file
 * TrueSpeech decoder.
 */

/**
 * TrueSpeech decoder context
 */
typedef struct TSContext {
    BswapDSPContext bdsp;
    /* input data */
    DECLARE_ALIGNED(16, uint8_t, buffer)[32];
    int16_t vector[8];  ///< input vector: 5/5/4/4/4/3/3/3
    int offset1[2];     ///< 8-bit value, used in one copying offset
    int offset2[4];     ///< 7-bit value, encodes offsets for copying and for two-point filter
    int pulseoff[4];    ///< 4-bit offset of pulse values block
    int pulsepos[4];    ///< 27-bit variable, encodes 7 pulse positions
    int pulseval[4];    ///< 7x2-bit pulse values
    int flag;           ///< 1-bit flag, shows how to choose filters
    /* temporary data */
    int filtbuf[146];   // some big vector used for storing filters
    int prevfilt[8];    // filter from previous frame
    int16_t tmp1[8];    // coefficients for adding to out
    int16_t tmp2[8];    // coefficients for adding to out
    int16_t tmp3[8];    // coefficients for adding to out
    int16_t cvector[8]; // correlated input vector
    int filtval;        // gain value for one function
    int16_t newvec[60]; // tmp vector
    int16_t filters[32]; // filters for every subframe
} TSContext;

static av_cold int truespeech_decode_init(AVCodecContext * avctx)
{
    TSContext *c = avctx->priv_data;

    if (avctx->channels != 1) {
        avpriv_request_sample(avctx, "Channel count %d", avctx->channels);
        return AVERROR_PATCHWELCOME;
    }

    avctx->channel_layout = AV_CH_LAYOUT_MONO;
    avctx->sample_fmt     = AV_SAMPLE_FMT_S16;

    ff_bswapdsp_init(&c->bdsp);

    return 0;
}

static void truespeech_read_frame(TSContext *dec, const uint8_t *input)
{
    GetBitContext gb;

    dec->bdsp.bswap_buf((uint32_t *) dec->buffer, (const uint32_t *) input, 8);
    init_get_bits(&gb, dec->buffer, 32 * 8);

    dec->vector[7] = ts_codebook[7][get_bits(&gb, 3)];
    dec->vector[6] = ts_codebook[6][get_bits(&gb, 3)];
    dec->vector[5] = ts_codebook[5][get_bits(&gb, 3)];
    dec->vector[4] = ts_codebook[4][get_bits(&gb, 4)];
    dec->vector[3] = ts_codebook[3][get_bits(&gb, 4)];
    dec->vector[2] = ts_codebook[2][get_bits(&gb, 4)];
    dec->vector[1] = ts_codebook[1][get_bits(&gb, 5)];
    dec->vector[0] = ts_codebook[0][get_bits(&gb, 5)];
    dec->flag      = get_bits1(&gb);

    dec->offset1[0] = get_bits(&gb, 4) << 4;
    dec->offset2[3] = get_bits(&gb, 7);
    dec->offset2[2] = get_bits(&gb, 7);
    dec->offset2[1] = get_bits(&gb, 7);
    dec->offset2[0] = get_bits(&gb, 7);

    dec->offset1[1]  = get_bits(&gb, 4);
    dec->pulseval[1] = get_bits(&gb, 14);
    dec->pulseval[0] = get_bits(&gb, 14);

    dec->offset1[1] |= get_bits(&gb, 4) << 4;
    dec->pulseval[3] = get_bits(&gb, 14);
    dec->pulseval[2] = get_bits(&gb, 14);

    dec->offset1[0] |= get_bits1(&gb);
    dec->pulsepos[0] = get_bits_long(&gb, 27);
    dec->pulseoff[0] = get_bits(&gb, 4);

    dec->offset1[0] |= get_bits1(&gb) << 1;
    dec->pulsepos[1] = get_bits_long(&gb, 27);
    dec->pulseoff[1] = get_bits(&gb, 4);

    dec->offset1[0] |= get_bits1(&gb) << 2;
    dec->pulsepos[2] = get_bits_long(&gb, 27);
    dec->pulseoff[2] = get_bits(&gb, 4);

    dec->offset1[0] |= get_bits1(&gb) << 3;
    dec->pulsepos[3] = get_bits_long(&gb, 27);
    dec->pulseoff[3] = get_bits(&gb, 4);
}

static void truespeech_correlate_filter(TSContext *dec)
{
    int16_t tmp[8];
    int i, j;

    for(i = 0; i < 8; i++){
        if(i > 0){
            memcpy(tmp, dec->cvector, i * sizeof(*tmp));
            for(j = 0; j < i; j++)
                dec->cvector[j] += (tmp[i - j - 1] * dec->vector[i] + 0x4000) >> 15;
        }
        dec->cvector[i] = (8 - dec->vector[i]) >> 3;
    }
    for(i = 0; i < 8; i++)
        dec->cvector[i] = (dec->cvector[i] * ts_decay_994_1000[i]) >> 15;

    dec->filtval = dec->vector[0];
}

static void truespeech_filters_merge(TSContext *dec)
{
    int i;

    if(!dec->flag){
        for(i = 0; i < 8; i++){
            dec->filters[i + 0] = dec->prevfilt[i];
            dec->filters[i + 8] = dec->prevfilt[i];
        }
    }else{
        for(i = 0; i < 8; i++){
            dec->filters[i + 0]=(dec->cvector[i] * 21846 + dec->prevfilt[i] * 10923 + 16384) >> 15;
            dec->filters[i + 8]=(dec->cvector[i] * 10923 + dec->prevfilt[i] * 21846 + 16384) >> 15;
        }
    }
    for(i = 0; i < 8; i++){
        dec->filters[i + 16] = dec->cvector[i];
        dec->filters[i + 24] = dec->cvector[i];
    }
}

static void truespeech_apply_twopoint_filter(TSContext *dec, int quart)
{
    int16_t tmp[146 + 60], *ptr0, *ptr1;
    const int16_t *filter;
    int i, t, off;

    t = dec->offset2[quart];
    if(t == 127){
        memset(dec->newvec, 0, 60 * sizeof(*dec->newvec));
        return;
    }
    for(i = 0; i < 146; i++)
        tmp[i] = dec->filtbuf[i];
    off = (t / 25) + dec->offset1[quart >> 1] + 18;
    off = av_clip(off, 0, 145);
    ptr0 = tmp + 145 - off;
    ptr1 = tmp + 146;
    filter = ts_order2_coeffs + (t % 25) * 2;
    for(i = 0; i < 60; i++){
        t = (ptr0[0] * filter[0] + ptr0[1] * filter[1] + 0x2000) >> 14;
        ptr0++;
        dec->newvec[i] = t;
        ptr1[i] = t;
    }
}

static void truespeech_place_pulses(TSContext *dec, int16_t *out, int quart)
{
    int16_t tmp[7];
    int i, j, t;
    const int16_t *ptr1;
    int16_t *ptr2;
    int coef;

    memset(out, 0, 60 * sizeof(*out));
    for(i = 0; i < 7; i++) {
        t = dec->pulseval[quart] & 3;
        dec->pulseval[quart] >>= 2;
        tmp[6 - i] = ts_pulse_scales[dec->pulseoff[quart] * 4 + t];
    }

    coef = dec->pulsepos[quart] >> 15;
    ptr1 = ts_pulse_values + 30;
    ptr2 = tmp;
    for(i = 0, j = 3; (i < 30) && (j > 0); i++){
        t = *ptr1++;
        if(coef >= t)
            coef -= t;
        else{
            out[i] = *ptr2++;
            ptr1 += 30;
            j--;
        }
    }
    coef = dec->pulsepos[quart] & 0x7FFF;
    ptr1 = ts_pulse_values;
    for(i = 30, j = 4; (i < 60) && (j > 0); i++){
        t = *ptr1++;
        if(coef >= t)
            coef -= t;
        else{
            out[i] = *ptr2++;
            ptr1 += 30;
            j--;
        }
    }

}

static void truespeech_update_filters(TSContext *dec, int16_t *out, int quart)
{
    int i;

    memmove(dec->filtbuf, &dec->filtbuf[60], 86 * sizeof(*dec->filtbuf));
    for(i = 0; i < 60; i++){
        dec->filtbuf[i + 86] = out[i] + dec->newvec[i] - (dec->newvec[i] >> 3);
        out[i] += dec->newvec[i];
    }
}

static void truespeech_synth(TSContext *dec, int16_t *out, int quart)
{
    int i,k;
    int t[8];
    int16_t *ptr0, *ptr1;

    ptr0 = dec->tmp1;
    ptr1 = dec->filters + quart * 8;
    for(i = 0; i < 60; i++){
        int sum = 0;
        for(k = 0; k < 8; k++)
            sum += ptr0[k] * (unsigned)ptr1[k];
        sum = out[i] + ((int)(sum + 0x800U) >> 12);
        out[i] = av_clip(sum, -0x7FFE, 0x7FFE);
        for(k = 7; k > 0; k--)
            ptr0[k] = ptr0[k - 1];
        ptr0[0] = out[i];
    }

    for(i = 0; i < 8; i++)
        t[i] = (ts_decay_35_64[i] * ptr1[i]) >> 15;

    ptr0 = dec->tmp2;
    for(i = 0; i < 60; i++){
        int sum = 0;
        for(k = 0; k < 8; k++)
            sum += ptr0[k] * t[k];
        for(k = 7; k > 0; k--)
            ptr0[k] = ptr0[k - 1];
        ptr0[0] = out[i];
        out[i] += (- sum) >> 12;
    }

    for(i = 0; i < 8; i++)
        t[i] = (ts_decay_3_4[i] * ptr1[i]) >> 15;

    ptr0 = dec->tmp3;
    for(i = 0; i < 60; i++){
        int sum = out[i] * (1 << 12);
        for(k = 0; k < 8; k++)
            sum += ptr0[k] * t[k];
        for(k = 7; k > 0; k--)
            ptr0[k] = ptr0[k - 1];
        ptr0[0] = av_clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);

        sum = ((ptr0[1] * (dec->filtval - (dec->filtval >> 2))) >> 4) + sum;
        sum = sum - (sum >> 3);
        out[i] = av_clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
    }
}

static void truespeech_save_prevvec(TSContext *c)
{
    int i;

    for(i = 0; i < 8; i++)
        c->prevfilt[i] = c->cvector[i];
}

static int truespeech_decode_frame(AVCodecContext *avctx, void *data,
                                   int *got_frame_ptr, AVPacket *avpkt)
{
    AVFrame *frame     = data;
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    TSContext *c = avctx->priv_data;

    int i, j;
    int16_t *samples;
    int iterations, ret;

    iterations = buf_size / 32;

    if (!iterations) {
        av_log(avctx, AV_LOG_ERROR,
               "Too small input buffer (%d bytes), need at least 32 bytes\n", buf_size);
        return -1;
    }

    /* get output buffer */
    frame->nb_samples = iterations * 240;
    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
        return ret;
    samples = (int16_t *)frame->data[0];

    memset(samples, 0, iterations * 240 * sizeof(*samples));

    for(j = 0; j < iterations; j++) {
        truespeech_read_frame(c, buf);
        buf += 32;

        truespeech_correlate_filter(c);
        truespeech_filters_merge(c);

        for(i = 0; i < 4; i++) {
            truespeech_apply_twopoint_filter(c, i);
            truespeech_place_pulses  (c, samples, i);
            truespeech_update_filters(c, samples, i);
            truespeech_synth         (c, samples, i);
            samples += 60;
        }

        truespeech_save_prevvec(c);
    }

    *got_frame_ptr = 1;

    return buf_size;
}

AVCodec ff_truespeech_decoder = {
    .name           = "truespeech",
    .long_name      = NULL_IF_CONFIG_SMALL("DSP Group TrueSpeech"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_TRUESPEECH,
    .priv_data_size = sizeof(TSContext),
    .init           = truespeech_decode_init,
    .decode         = truespeech_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* DSP Group TrueSpeech compatible decoder
3			* Copyright (c) 2005 Konstantin Shishkov
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/channel_layout.h"
23			#include "libavutil/intreadwrite.h"
24			#include "libavutil/mem_internal.h"
25
26			#include "avcodec.h"
27			#include "bswapdsp.h"
28			#include "get_bits.h"
29			#include "internal.h"
30
31			#include "truespeech_data.h"
32			/**
33			* @file
34			* TrueSpeech decoder.
35			*/
36
37			/**
38			* TrueSpeech decoder context
39			*/
40			typedef struct TSContext {
41			BswapDSPContext bdsp;
42			/* input data */
43			DECLARE_ALIGNED(16, uint8_t, buffer)[32];
44			int16_t vector[8]; ///< input vector: 5/5/4/4/4/3/3/3
45			int offset1[2]; ///< 8-bit value, used in one copying offset
46			int offset2[4]; ///< 7-bit value, encodes offsets for copying and for two-point filter
47			int pulseoff[4]; ///< 4-bit offset of pulse values block
48			int pulsepos[4]; ///< 27-bit variable, encodes 7 pulse positions
49			int pulseval[4]; ///< 7x2-bit pulse values
50			int flag; ///< 1-bit flag, shows how to choose filters
51			/* temporary data */
52			int filtbuf[146]; // some big vector used for storing filters
53			int prevfilt[8]; // filter from previous frame
54			int16_t tmp1[8]; // coefficients for adding to out
55			int16_t tmp2[8]; // coefficients for adding to out
56			int16_t tmp3[8]; // coefficients for adding to out
57			int16_t cvector[8]; // correlated input vector
58			int filtval; // gain value for one function
59			int16_t newvec[60]; // tmp vector
60			int16_t filters[32]; // filters for every subframe
61			} TSContext;
62
63		2	static av_cold int truespeech_decode_init(AVCodecContext * avctx)
64			{
65		2	TSContext *c = avctx->priv_data;
66
67	✗✓	2	if (avctx->channels != 1) {
68			avpriv_request_sample(avctx, "Channel count %d", avctx->channels);
69			return AVERROR_PATCHWELCOME;
70			}
71
72		2	avctx->channel_layout = AV_CH_LAYOUT_MONO;
73		2	avctx->sample_fmt = AV_SAMPLE_FMT_S16;
74
75		2	ff_bswapdsp_init(&c->bdsp);
76
77		2	return 0;
78			}
79
80		1442	static void truespeech_read_frame(TSContext dec, const uint8_t input)
81			{
82			GetBitContext gb;
83
84		1442	dec->bdsp.bswap_buf((uint32_t ) dec->buffer, (const uint32_t ) input, 8);
85		1442	init_get_bits(&gb, dec->buffer, 32 * 8);
86
87		1442	dec->vector[7] = ts_codebook[7][get_bits(&gb, 3)];
88		1442	dec->vector[6] = ts_codebook[6][get_bits(&gb, 3)];
89		1442	dec->vector[5] = ts_codebook[5][get_bits(&gb, 3)];
90		1442	dec->vector[4] = ts_codebook[4][get_bits(&gb, 4)];
91		1442	dec->vector[3] = ts_codebook[3][get_bits(&gb, 4)];
92		1442	dec->vector[2] = ts_codebook[2][get_bits(&gb, 4)];
93		1442	dec->vector[1] = ts_codebook[1][get_bits(&gb, 5)];
94		1442	dec->vector[0] = ts_codebook[0][get_bits(&gb, 5)];
95		1442	dec->flag = get_bits1(&gb);
96
97		1442	dec->offset1[0] = get_bits(&gb, 4) << 4;
98		1442	dec->offset2[3] = get_bits(&gb, 7);
99		1442	dec->offset2[2] = get_bits(&gb, 7);
100		1442	dec->offset2[1] = get_bits(&gb, 7);
101		1442	dec->offset2[0] = get_bits(&gb, 7);
102
103		1442	dec->offset1[1] = get_bits(&gb, 4);
104		1442	dec->pulseval[1] = get_bits(&gb, 14);
105		1442	dec->pulseval[0] = get_bits(&gb, 14);
106
107		1442	dec->offset1[1] \|= get_bits(&gb, 4) << 4;
108		1442	dec->pulseval[3] = get_bits(&gb, 14);
109		1442	dec->pulseval[2] = get_bits(&gb, 14);
110
111		1442	dec->offset1[0] \|= get_bits1(&gb);
112		1442	dec->pulsepos[0] = get_bits_long(&gb, 27);
113		1442	dec->pulseoff[0] = get_bits(&gb, 4);
114
115		1442	dec->offset1[0] \|= get_bits1(&gb) << 1;
116		1442	dec->pulsepos[1] = get_bits_long(&gb, 27);
117		1442	dec->pulseoff[1] = get_bits(&gb, 4);
118
119		1442	dec->offset1[0] \|= get_bits1(&gb) << 2;
120		1442	dec->pulsepos[2] = get_bits_long(&gb, 27);
121		1442	dec->pulseoff[2] = get_bits(&gb, 4);
122
123		1442	dec->offset1[0] \|= get_bits1(&gb) << 3;
124		1442	dec->pulsepos[3] = get_bits_long(&gb, 27);
125		1442	dec->pulseoff[3] = get_bits(&gb, 4);
126		1442	}
127
128		1442	static void truespeech_correlate_filter(TSContext *dec)
129			{
130			int16_t tmp[8];
131			int i, j;
132
133	✓✓	12978	for(i = 0; i < 8; i++){
134	✓✓	11536	if(i > 0){
135		10094	memcpy(tmp, dec->cvector, i * sizeof(*tmp));
136	✓✓	50470	for(j = 0; j < i; j++)
137		40376	dec->cvector[j] += (tmp[i - j - 1] * dec->vector[i] + 0x4000) >> 15;
138			}
139		11536	dec->cvector[i] = (8 - dec->vector[i]) >> 3;
140			}
141	✓✓	12978	for(i = 0; i < 8; i++)
142		11536	dec->cvector[i] = (dec->cvector[i] * ts_decay_994_1000[i]) >> 15;
143
144		1442	dec->filtval = dec->vector[0];
145		1442	}
146
147		1442	static void truespeech_filters_merge(TSContext *dec)
148			{
149			int i;
150
151	✓✓	1442	if(!dec->flag){
152	✓✓	99	for(i = 0; i < 8; i++){
153		88	dec->filters[i + 0] = dec->prevfilt[i];
154		88	dec->filters[i + 8] = dec->prevfilt[i];
155			}
156			}else{
157	✓✓	12879	for(i = 0; i < 8; i++){
158		11448	dec->filters[i + 0]=(dec->cvector[i] * 21846 + dec->prevfilt[i] * 10923 + 16384) >> 15;
159		11448	dec->filters[i + 8]=(dec->cvector[i] * 10923 + dec->prevfilt[i] * 21846 + 16384) >> 15;
160			}
161			}
162	✓✓	12978	for(i = 0; i < 8; i++){
163		11536	dec->filters[i + 16] = dec->cvector[i];
164		11536	dec->filters[i + 24] = dec->cvector[i];
165			}
166		1442	}
167
168		5768	static void truespeech_apply_twopoint_filter(TSContext *dec, int quart)
169			{
170			int16_t tmp[146 + 60], ptr0, ptr1;
171			const int16_t *filter;
172			int i, t, off;
173
174		5768	t = dec->offset2[quart];
175	✓✓	5768	if(t == 127){
176		358	memset(dec->newvec, 0, 60 * sizeof(*dec->newvec));
177		358	return;
178			}
179	✓✓	795270	for(i = 0; i < 146; i++)
180		789860	tmp[i] = dec->filtbuf[i];
181		5410	off = (t / 25) + dec->offset1[quart >> 1] + 18;
182		5410	off = av_clip(off, 0, 145);
183		5410	ptr0 = tmp + 145 - off;
184		5410	ptr1 = tmp + 146;
185		5410	filter = ts_order2_coeffs + (t % 25) * 2;
186	✓✓	330010	for(i = 0; i < 60; i++){
187		324600	t = (ptr0[0] * filter[0] + ptr0[1] * filter[1] + 0x2000) >> 14;
188		324600	ptr0++;
189		324600	dec->newvec[i] = t;
190		324600	ptr1[i] = t;
191			}
192			}
193
194		5768	static void truespeech_place_pulses(TSContext dec, int16_t out, int quart)
195			{
196			int16_t tmp[7];
197			int i, j, t;
198			const int16_t *ptr1;
199			int16_t *ptr2;
200			int coef;
201
202		5768	memset(out, 0, 60 * sizeof(*out));
203	✓✓	46144	for(i = 0; i < 7; i++) {
204		40376	t = dec->pulseval[quart] & 3;
205		40376	dec->pulseval[quart] >>= 2;
206		40376	tmp[6 - i] = ts_pulse_scales[dec->pulseoff[quart] * 4 + t];
207			}
208
209		5768	coef = dec->pulsepos[quart] >> 15;
210		5768	ptr1 = ts_pulse_values + 30;
211		5768	ptr2 = tmp;
212	✓✓✓✓	136138	for(i = 0, j = 3; (i < 30) && (j > 0); i++){
213		130370	t = *ptr1++;
214	✓✓	130370	if(coef >= t)
215		113066	coef -= t;
216			else{
217		17304	out[i] = *ptr2++;
218		17304	ptr1 += 30;
219		17304	j--;
220			}
221			}
222		5768	coef = dec->pulsepos[quart] & 0x7FFF;
223		5768	ptr1 = ts_pulse_values;
224	✓✓✓✓	141397	for(i = 30, j = 4; (i < 60) && (j > 0); i++){
225		135629	t = *ptr1++;
226	✓✓	135629	if(coef >= t)
227		112557	coef -= t;
228			else{
229		23072	out[i] = *ptr2++;
230		23072	ptr1 += 30;
231		23072	j--;
232			}
233			}
234
235		5768	}
236
237		5768	static void truespeech_update_filters(TSContext dec, int16_t out, int quart)
238			{
239			int i;
240
241		5768	memmove(dec->filtbuf, &dec->filtbuf[60], 86 * sizeof(*dec->filtbuf));
242	✓✓	351848	for(i = 0; i < 60; i++){
243		346080	dec->filtbuf[i + 86] = out[i] + dec->newvec[i] - (dec->newvec[i] >> 3);
244		346080	out[i] += dec->newvec[i];
245			}
246		5768	}
247
248		5768	static void truespeech_synth(TSContext dec, int16_t out, int quart)
249			{
250			int i,k;
251			int t[8];
252			int16_t ptr0, ptr1;
253
254		5768	ptr0 = dec->tmp1;
255		5768	ptr1 = dec->filters + quart * 8;
256	✓✓	351848	for(i = 0; i < 60; i++){
257		346080	int sum = 0;
258	✓✓	3114720	for(k = 0; k < 8; k++)
259		2768640	sum += ptr0[k] * (unsigned)ptr1[k];
260		346080	sum = out[i] + ((int)(sum + 0x800U) >> 12);
261		346080	out[i] = av_clip(sum, -0x7FFE, 0x7FFE);
262	✓✓	2768640	for(k = 7; k > 0; k--)
263		2422560	ptr0[k] = ptr0[k - 1];
264		346080	ptr0[0] = out[i];
265			}
266
267	✓✓	51912	for(i = 0; i < 8; i++)
268		46144	t[i] = (ts_decay_35_64[i] * ptr1[i]) >> 15;
269
270		5768	ptr0 = dec->tmp2;
271	✓✓	351848	for(i = 0; i < 60; i++){
272		346080	int sum = 0;
273	✓✓	3114720	for(k = 0; k < 8; k++)
274		2768640	sum += ptr0[k] * t[k];
275	✓✓	2768640	for(k = 7; k > 0; k--)
276		2422560	ptr0[k] = ptr0[k - 1];
277		346080	ptr0[0] = out[i];
278		346080	out[i] += (- sum) >> 12;
279			}
280
281	✓✓	51912	for(i = 0; i < 8; i++)
282		46144	t[i] = (ts_decay_3_4[i] * ptr1[i]) >> 15;
283
284		5768	ptr0 = dec->tmp3;
285	✓✓	351848	for(i = 0; i < 60; i++){
286		346080	int sum = out[i] * (1 << 12);
287	✓✓	3114720	for(k = 0; k < 8; k++)
288		2768640	sum += ptr0[k] * t[k];
289	✓✓	2768640	for(k = 7; k > 0; k--)
290		2422560	ptr0[k] = ptr0[k - 1];
291		346080	ptr0[0] = av_clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
292
293		346080	sum = ((ptr0[1] * (dec->filtval - (dec->filtval >> 2))) >> 4) + sum;
294		346080	sum = sum - (sum >> 3);
295		346080	out[i] = av_clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
296			}
297		5768	}
298
299		1442	static void truespeech_save_prevvec(TSContext *c)
300			{
301			int i;
302
303	✓✓	12978	for(i = 0; i < 8; i++)
304		11536	c->prevfilt[i] = c->cvector[i];
305		1442	}
306
307		12	static int truespeech_decode_frame(AVCodecContext avctx, void data,
308			int got_frame_ptr, AVPacket avpkt)
309			{
310		12	AVFrame *frame = data;
311		12	const uint8_t *buf = avpkt->data;
312		12	int buf_size = avpkt->size;
313		12	TSContext *c = avctx->priv_data;
314
315			int i, j;
316			int16_t *samples;
317			int iterations, ret;
318
319		12	iterations = buf_size / 32;
320
321	✗✓	12	if (!iterations) {
322			av_log(avctx, AV_LOG_ERROR,
323			"Too small input buffer (%d bytes), need at least 32 bytes\n", buf_size);
324			return -1;
325			}
326
327			/* get output buffer */
328		12	frame->nb_samples = iterations * 240;
329	✗✓	12	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
330			return ret;
331		12	samples = (int16_t *)frame->data[0];
332
333		12	memset(samples, 0, iterations * 240 * sizeof(*samples));
334
335	✓✓	1454	for(j = 0; j < iterations; j++) {
336		1442	truespeech_read_frame(c, buf);
337		1442	buf += 32;
338
339		1442	truespeech_correlate_filter(c);
340		1442	truespeech_filters_merge(c);
341
342	✓✓	7210	for(i = 0; i < 4; i++) {
343		5768	truespeech_apply_twopoint_filter(c, i);
344		5768	truespeech_place_pulses (c, samples, i);
345		5768	truespeech_update_filters(c, samples, i);
346		5768	truespeech_synth (c, samples, i);
347		5768	samples += 60;
348			}
349
350		1442	truespeech_save_prevvec(c);
351			}
352
353		12	*got_frame_ptr = 1;
354
355		12	return buf_size;
356			}
357
358			AVCodec ff_truespeech_decoder = {
359			.name = "truespeech",
360			.long_name = NULL_IF_CONFIG_SMALL("DSP Group TrueSpeech"),
361			.type = AVMEDIA_TYPE_AUDIO,
362			.id = AV_CODEC_ID_TRUESPEECH,
363			.priv_data_size = sizeof(TSContext),
364			.init = truespeech_decode_init,
365			.decode = truespeech_decode_frame,
366			.capabilities = AV_CODEC_CAP_DR1,
367			};