FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/nellymoserdec.c	Lines:	67	72	93.1 %
Date:	2021-04-18 10:33:33	Branches:	20	24	83.3 %


/*
 * NellyMoser audio decoder
 * Copyright (c) 2007 a840bda5870ba11f19698ff6eb9581dfb0f95fa5,
 *                    539459aeb7d425140b62a3ec7dbf6dc8e408a306, and
 *                    520e17cd55896441042b14df2566a6eb610ed444
 * Copyright (c) 2007 Loic Minier <lool at dooz.org>
 *                    Benjamin Larsson
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * @file
 * The 3 alphanumeric copyright notices are md5summed they are from the original
 * implementors. The original code is available from http://code.google.com/p/nelly2pcm/
 */

#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/lfg.h"
#include "libavutil/mem_internal.h"
#include "libavutil/random_seed.h"

#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "fft.h"
#include "get_bits.h"
#include "internal.h"
#include "nellymoser.h"
#include "sinewin.h"


typedef struct NellyMoserDecodeContext {
    AVCodecContext* avctx;
    AVLFG           random_state;
    GetBitContext   gb;
    float           scale_bias;
    AVFloatDSPContext *fdsp;
    FFTContext      imdct_ctx;
    DECLARE_ALIGNED(32, float, imdct_buf)[2][NELLY_BUF_LEN];
    float          *imdct_out;
    float          *imdct_prev;
} NellyMoserDecodeContext;

static void nelly_decode_block(NellyMoserDecodeContext *s,
                               const unsigned char block[NELLY_BLOCK_LEN],
                               float audio[NELLY_SAMPLES])
{
    int i,j;
    float buf[NELLY_FILL_LEN], pows[NELLY_FILL_LEN];
    float *aptr, *bptr, *pptr, val, pval;
    int bits[NELLY_BUF_LEN];
    unsigned char v;

    init_get_bits(&s->gb, block, NELLY_BLOCK_LEN * 8);

    bptr = buf;
    pptr = pows;
    val = ff_nelly_init_table[get_bits(&s->gb, 6)];
    for (i=0 ; i<NELLY_BANDS ; i++) {
        if (i > 0)
            val += ff_nelly_delta_table[get_bits(&s->gb, 5)];
        pval = -exp2(val/2048) * s->scale_bias;
        for (j = 0; j < ff_nelly_band_sizes_table[i]; j++) {
            *bptr++ = val;
            *pptr++ = pval;
        }

    }

    ff_nelly_get_sample_bits(buf, bits);

    for (i = 0; i < 2; i++) {
        aptr = audio + i * NELLY_BUF_LEN;

        init_get_bits(&s->gb, block, NELLY_BLOCK_LEN * 8);
        skip_bits_long(&s->gb, NELLY_HEADER_BITS + i*NELLY_DETAIL_BITS);

        for (j = 0; j < NELLY_FILL_LEN; j++) {
            if (bits[j] <= 0) {
                aptr[j] = M_SQRT1_2*pows[j];
                if (av_lfg_get(&s->random_state) & 1)
                    aptr[j] *= -1.0;
            } else {
                v = get_bits(&s->gb, bits[j]);
                aptr[j] = ff_nelly_dequantization_table[(1<<bits[j])-1+v]*pows[j];
            }
        }
        memset(&aptr[NELLY_FILL_LEN], 0,
               (NELLY_BUF_LEN - NELLY_FILL_LEN) * sizeof(float));

        s->imdct_ctx.imdct_half(&s->imdct_ctx, s->imdct_out, aptr);
        s->fdsp->vector_fmul_window(aptr, s->imdct_prev + NELLY_BUF_LEN / 2,
                                   s->imdct_out, ff_sine_128,
                                   NELLY_BUF_LEN / 2);
        FFSWAP(float *, s->imdct_out, s->imdct_prev);
    }
}

static av_cold int decode_init(AVCodecContext * avctx) {
    NellyMoserDecodeContext *s = avctx->priv_data;

    s->avctx = avctx;
    s->imdct_out = s->imdct_buf[0];
    s->imdct_prev = s->imdct_buf[1];
    av_lfg_init(&s->random_state, 0);
    ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);

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

    s->scale_bias = 1.0/(32768*8);
    avctx->sample_fmt = AV_SAMPLE_FMT_FLT;

    avctx->channels       = 1;
    avctx->channel_layout = AV_CH_LAYOUT_MONO;

    /* Generate overlap window */
    ff_init_ff_sine_windows(7);

    return 0;
}

static int decode_tag(AVCodecContext *avctx, void *data,
                      int *got_frame_ptr, AVPacket *avpkt)
{
    AVFrame *frame     = data;
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    NellyMoserDecodeContext *s = avctx->priv_data;
    int blocks, i, ret;
    float   *samples_flt;

    blocks     = buf_size / NELLY_BLOCK_LEN;

    if (blocks <= 0) {
        av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
        return AVERROR_INVALIDDATA;
    }

    if (buf_size % NELLY_BLOCK_LEN) {
        av_log(avctx, AV_LOG_WARNING, "Leftover bytes: %d.\n",
               buf_size % NELLY_BLOCK_LEN);
    }

    /* get output buffer */
    frame->nb_samples = NELLY_SAMPLES * blocks;
    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
        return ret;
    samples_flt = (float *)frame->data[0];

    for (i=0 ; i<blocks ; i++) {
        nelly_decode_block(s, buf, samples_flt);
        samples_flt += NELLY_SAMPLES;
        buf += NELLY_BLOCK_LEN;
    }

    *got_frame_ptr = 1;

    return buf_size;
}

static av_cold int decode_end(AVCodecContext * avctx) {
    NellyMoserDecodeContext *s = avctx->priv_data;

    ff_mdct_end(&s->imdct_ctx);
    av_freep(&s->fdsp);

    return 0;
}

AVCodec ff_nellymoser_decoder = {
    .name           = "nellymoser",
    .long_name      = NULL_IF_CONFIG_SMALL("Nellymoser Asao"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_NELLYMOSER,
    .priv_data_size = sizeof(NellyMoserDecodeContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_tag,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_PARAM_CHANGE | AV_CODEC_CAP_CHANNEL_CONF,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT,
                                                      AV_SAMPLE_FMT_NONE },
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* NellyMoser audio decoder
3			* Copyright (c) 2007 a840bda5870ba11f19698ff6eb9581dfb0f95fa5,
4			* 539459aeb7d425140b62a3ec7dbf6dc8e408a306, and
5			* 520e17cd55896441042b14df2566a6eb610ed444
6			* Copyright (c) 2007 Loic Minier <lool at dooz.org>
7			* Benjamin Larsson
8			*
9			* Permission is hereby granted, free of charge, to any person obtaining a
10			* copy of this software and associated documentation files (the "Software"),
11			* to deal in the Software without restriction, including without limitation
12			* the rights to use, copy, modify, merge, publish, distribute, sublicense,
13			* and/or sell copies of the Software, and to permit persons to whom the
14			* Software is furnished to do so, subject to the following conditions:
15			*
16			* The above copyright notice and this permission notice shall be included in
17			* all copies or substantial portions of the Software.
18			*
19			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20			* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21			* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22			* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23			* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24			* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25			* DEALINGS IN THE SOFTWARE.
26			*/
27
28			/**
29			* @file
30			* The 3 alphanumeric copyright notices are md5summed they are from the original
31			* implementors. The original code is available from http://code.google.com/p/nelly2pcm/
32			*/
33
34			#include "libavutil/channel_layout.h"
35			#include "libavutil/float_dsp.h"
36			#include "libavutil/lfg.h"
37			#include "libavutil/mem_internal.h"
38			#include "libavutil/random_seed.h"
39
40			#define BITSTREAM_READER_LE
41			#include "avcodec.h"
42			#include "fft.h"
43			#include "get_bits.h"
44			#include "internal.h"
45			#include "nellymoser.h"
46			#include "sinewin.h"
47
48
49			typedef struct NellyMoserDecodeContext {
50			AVCodecContext* avctx;
51			AVLFG random_state;
52			GetBitContext gb;
53			float scale_bias;
54			AVFloatDSPContext *fdsp;
55			FFTContext imdct_ctx;
56			DECLARE_ALIGNED(32, float, imdct_buf)[2][NELLY_BUF_LEN];
57			float *imdct_out;
58			float *imdct_prev;
59			} NellyMoserDecodeContext;
60
61		2805	static void nelly_decode_block(NellyMoserDecodeContext *s,
62			const unsigned char block[NELLY_BLOCK_LEN],
63			float audio[NELLY_SAMPLES])
64			{
65			int i,j;
66			float buf[NELLY_FILL_LEN], pows[NELLY_FILL_LEN];
67			float aptr, bptr, *pptr, val, pval;
68			int bits[NELLY_BUF_LEN];
69			unsigned char v;
70
71		2805	init_get_bits(&s->gb, block, NELLY_BLOCK_LEN * 8);
72
73		2805	bptr = buf;
74		2805	pptr = pows;
75		2805	val = ff_nelly_init_table[get_bits(&s->gb, 6)];
76	✓✓	67320	for (i=0 ; i<NELLY_BANDS ; i++) {
77	✓✓	64515	if (i > 0)
78		61710	val += ff_nelly_delta_table[get_bits(&s->gb, 5)];
79		64515	pval = -exp2(val/2048) * s->scale_bias;
80	✓✓	412335	for (j = 0; j < ff_nelly_band_sizes_table[i]; j++) {
81		347820	*bptr++ = val;
82		347820	*pptr++ = pval;
83			}
84
85			}
86
87		2805	ff_nelly_get_sample_bits(buf, bits);
88
89	✓✓	8415	for (i = 0; i < 2; i++) {
90		5610	aptr = audio + i * NELLY_BUF_LEN;
91
92		5610	init_get_bits(&s->gb, block, NELLY_BLOCK_LEN * 8);
93		5610	skip_bits_long(&s->gb, NELLY_HEADER_BITS + i*NELLY_DETAIL_BITS);
94
95	✓✓	701250	for (j = 0; j < NELLY_FILL_LEN; j++) {
96	✓✓	695640	if (bits[j] <= 0) {
97		193626	aptr[j] = M_SQRT1_2*pows[j];
98	✓✓	193626	if (av_lfg_get(&s->random_state) & 1)
99		97008	aptr[j] *= -1.0;
100			} else {
101		502014	v = get_bits(&s->gb, bits[j]);
102		502014	aptr[j] = ff_nelly_dequantization_table[(1<<bits[j])-1+v]*pows[j];
103			}
104			}
105		5610	memset(&aptr[NELLY_FILL_LEN], 0,
106			(NELLY_BUF_LEN - NELLY_FILL_LEN) * sizeof(float));
107
108		5610	s->imdct_ctx.imdct_half(&s->imdct_ctx, s->imdct_out, aptr);
109		5610	s->fdsp->vector_fmul_window(aptr, s->imdct_prev + NELLY_BUF_LEN / 2,
110		5610	s->imdct_out, ff_sine_128,
111			NELLY_BUF_LEN / 2);
112		5610	FFSWAP(float *, s->imdct_out, s->imdct_prev);
113			}
114		2805	}
115
116		6	static av_cold int decode_init(AVCodecContext * avctx) {
117		6	NellyMoserDecodeContext *s = avctx->priv_data;
118
119		6	s->avctx = avctx;
120		6	s->imdct_out = s->imdct_buf[0];
121		6	s->imdct_prev = s->imdct_buf[1];
122		6	av_lfg_init(&s->random_state, 0);
123		6	ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);
124
125		6	s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
126	✗✓	6	if (!s->fdsp)
127			return AVERROR(ENOMEM);
128
129		6	s->scale_bias = 1.0/(32768*8);
130		6	avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
131
132		6	avctx->channels = 1;
133		6	avctx->channel_layout = AV_CH_LAYOUT_MONO;
134
135			/* Generate overlap window */
136		6	ff_init_ff_sine_windows(7);
137
138		6	return 0;
139			}
140
141		1701	static int decode_tag(AVCodecContext avctx, void data,
142			int got_frame_ptr, AVPacket avpkt)
143			{
144		1701	AVFrame *frame = data;
145		1701	const uint8_t *buf = avpkt->data;
146		1701	int buf_size = avpkt->size;
147		1701	NellyMoserDecodeContext *s = avctx->priv_data;
148			int blocks, i, ret;
149			float *samples_flt;
150
151		1701	blocks = buf_size / NELLY_BLOCK_LEN;
152
153	✗✓	1701	if (blocks <= 0) {
154			av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
155			return AVERROR_INVALIDDATA;
156			}
157
158	✗✓	1701	if (buf_size % NELLY_BLOCK_LEN) {
159			av_log(avctx, AV_LOG_WARNING, "Leftover bytes: %d.\n",
160			buf_size % NELLY_BLOCK_LEN);
161			}
162
163			/* get output buffer */
164		1701	frame->nb_samples = NELLY_SAMPLES * blocks;
165	✗✓	1701	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
166			return ret;
167		1701	samples_flt = (float *)frame->data[0];
168
169	✓✓	4506	for (i=0 ; i<blocks ; i++) {
170		2805	nelly_decode_block(s, buf, samples_flt);
171		2805	samples_flt += NELLY_SAMPLES;
172		2805	buf += NELLY_BLOCK_LEN;
173			}
174
175		1701	*got_frame_ptr = 1;
176
177		1701	return buf_size;
178			}
179
180		6	static av_cold int decode_end(AVCodecContext * avctx) {
181		6	NellyMoserDecodeContext *s = avctx->priv_data;
182
183		6	ff_mdct_end(&s->imdct_ctx);
184		6	av_freep(&s->fdsp);
185
186		6	return 0;
187			}
188
189			AVCodec ff_nellymoser_decoder = {
190			.name = "nellymoser",
191			.long_name = NULL_IF_CONFIG_SMALL("Nellymoser Asao"),
192			.type = AVMEDIA_TYPE_AUDIO,
193			.id = AV_CODEC_ID_NELLYMOSER,
194			.priv_data_size = sizeof(NellyMoserDecodeContext),
195			.init = decode_init,
196			.close = decode_end,
197			.decode = decode_tag,
198			.capabilities = AV_CODEC_CAP_DR1 \| AV_CODEC_CAP_PARAM_CHANGE \| AV_CODEC_CAP_CHANNEL_CONF,
199			.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT,
200			AV_SAMPLE_FMT_NONE },
201			.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
202			};