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GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/ac3enc_float.c	Lines:	37	40	92.5 %
Date:	2019-11-18 18:00:01	Branches:	6	10	60.0 %


/*
 * The simplest AC-3 encoder
 * Copyright (c) 2000 Fabrice Bellard
 * Copyright (c) 2006-2010 Justin Ruggles <justin.ruggles@gmail.com>
 * Copyright (c) 2006-2010 Prakash Punnoor <prakash@punnoor.de>
 *
 * 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
 */

/**
 * @file
 * floating-point AC-3 encoder.
 */

#define CONFIG_AC3ENC_FLOAT 1
#include "internal.h"
#include "audiodsp.h"
#include "ac3enc.h"
#include "eac3enc.h"
#include "kbdwin.h"


#define AC3ENC_TYPE AC3ENC_TYPE_AC3
#include "ac3enc_opts_template.c"
static const AVClass ac3enc_class = {
    .class_name = "AC-3 Encoder",
    .item_name  = av_default_item_name,
    .option     = ac3_options,
    .version    = LIBAVUTIL_VERSION_INT,
};


/*
 * Scale MDCT coefficients from float to 24-bit fixed-point.
 */
static void scale_coefficients(AC3EncodeContext *s)
{
    int chan_size = AC3_MAX_COEFS * s->num_blocks;
    int cpl       = s->cpl_on;
    s->ac3dsp.float_to_fixed24(s->fixed_coef_buffer + (chan_size * !cpl),
                               s->mdct_coef_buffer  + (chan_size * !cpl),
                               chan_size * (s->channels + cpl));
}


/*
 * Clip MDCT coefficients to allowable range.
 */
static void clip_coefficients(AudioDSPContext *adsp, float *coef,
                              unsigned int len)
{
    adsp->vector_clipf(coef, coef, len, COEF_MIN, COEF_MAX);
}


/*
 * Calculate a single coupling coordinate.
 */
static CoefType calc_cpl_coord(CoefSumType energy_ch, CoefSumType energy_cpl)
{
    float coord = 0.125;
    if (energy_cpl > 0)
        coord *= sqrtf(energy_ch / energy_cpl);
    return FFMIN(coord, COEF_MAX);
}

static void sum_square_butterfly(AC3EncodeContext *s, float sum[4],
                                 const float *coef0, const float *coef1,
                                 int len)
{
    s->ac3dsp.sum_square_butterfly_float(sum, coef0, coef1, len);
}


#include "ac3enc_template.c"


/**
 * Finalize MDCT and free allocated memory.
 *
 * @param s  AC-3 encoder private context
 */
av_cold void ff_ac3_float_mdct_end(AC3EncodeContext *s)
{
    ff_mdct_end(&s->mdct);
    av_freep(&s->mdct_window);
}


/**
 * Initialize MDCT tables.
 *
 * @param s  AC-3 encoder private context
 * @return   0 on success, negative error code on failure
 */
av_cold int ff_ac3_float_mdct_init(AC3EncodeContext *s)
{
    float *window;
    int i, n, n2;

    n  = 1 << 9;
    n2 = n >> 1;

    window = av_malloc_array(n, sizeof(*window));
    if (!window) {
        av_log(s->avctx, AV_LOG_ERROR, "Cannot allocate memory.\n");
        return AVERROR(ENOMEM);
    }
    ff_kbd_window_init(window, 5.0, n2);
    for (i = 0; i < n2; i++)
        window[n-1-i] = window[i];
    s->mdct_window = window;

    return ff_mdct_init(&s->mdct, 9, 0, -2.0 / n);
}


av_cold int ff_ac3_float_encode_init(AVCodecContext *avctx)
{
    AC3EncodeContext *s = avctx->priv_data;
    s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
    if (!s->fdsp)
        return AVERROR(ENOMEM);
    return ff_ac3_encode_init(avctx);
}

AVCodec ff_ac3_encoder = {
    .name            = "ac3",
    .long_name       = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
    .type            = AVMEDIA_TYPE_AUDIO,
    .id              = AV_CODEC_ID_AC3,
    .priv_data_size  = sizeof(AC3EncodeContext),
    .init            = ff_ac3_float_encode_init,
    .encode2         = ff_ac3_float_encode_frame,
    .close           = ff_ac3_encode_close,
    .sample_fmts     = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
                                                      AV_SAMPLE_FMT_NONE },
    .priv_class      = &ac3enc_class,
    .channel_layouts = ff_ac3_channel_layouts,
    .defaults        = ac3_defaults,
};


Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/*
2			* The simplest AC-3 encoder
3			* Copyright (c) 2000 Fabrice Bellard
4			* Copyright (c) 2006-2010 Justin Ruggles <justin.ruggles@gmail.com>
5			* Copyright (c) 2006-2010 Prakash Punnoor <prakash@punnoor.de>
6			*
7			* This file is part of FFmpeg.
8			*
9			* FFmpeg is free software; you can redistribute it and/or
10			* modify it under the terms of the GNU Lesser General Public
11			* License as published by the Free Software Foundation; either
12			* version 2.1 of the License, or (at your option) any later version.
13			*
14			* FFmpeg is distributed in the hope that it will be useful,
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17			* Lesser General Public License for more details.
18			*
19			* You should have received a copy of the GNU Lesser General Public
20			* License along with FFmpeg; if not, write to the Free Software
21			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22			*/
23
24			/**
25			* @file
26			* floating-point AC-3 encoder.
27			*/
28
29			#define CONFIG_AC3ENC_FLOAT 1
30			#include "internal.h"
31			#include "audiodsp.h"
32			#include "ac3enc.h"
33			#include "eac3enc.h"
34			#include "kbdwin.h"
35
36
37			#define AC3ENC_TYPE AC3ENC_TYPE_AC3
38			#include "ac3enc_opts_template.c"
39			static const AVClass ac3enc_class = {
40			.class_name = "AC-3 Encoder",
41			.item_name = av_default_item_name,
42			.option = ac3_options,
43			.version = LIBAVUTIL_VERSION_INT,
44			};
45
46
47			/*
48			* Scale MDCT coefficients from float to 24-bit fixed-point.
49			*/
50		546	static void scale_coefficients(AC3EncodeContext *s)
51			{
52		546	int chan_size = AC3_MAX_COEFS * s->num_blocks;
53		546	int cpl = s->cpl_on;
54		546	s->ac3dsp.float_to_fixed24(s->fixed_coef_buffer + (chan_size * !cpl),
55		546	s->mdct_coef_buffer + (chan_size * !cpl),
56		546	chan_size * (s->channels + cpl));
57		546	}
58
59
60			/*
61			* Clip MDCT coefficients to allowable range.
62			*/
63		3822	static void clip_coefficients(AudioDSPContext adsp, float coef,
64			unsigned int len)
65			{
66		3822	adsp->vector_clipf(coef, coef, len, COEF_MIN, COEF_MAX);
67		3822	}
68
69
70			/*
71			* Calculate a single coupling coordinate.
72			*/
73		30736	static CoefType calc_cpl_coord(CoefSumType energy_ch, CoefSumType energy_cpl)
74			{
75		30736	float coord = 0.125;
76	✓✗	30736	if (energy_cpl > 0)
77		30736	coord *= sqrtf(energy_ch / energy_cpl);
78	✗✓	30736	return FFMIN(coord, COEF_MAX);
79			}
80
81		13104	static void sum_square_butterfly(AC3EncodeContext *s, float sum[4],
82			const float coef0, const float coef1,
83			int len)
84			{
85		13104	s->ac3dsp.sum_square_butterfly_float(sum, coef0, coef1, len);
86		13104	}
87
88
89			#include "ac3enc_template.c"
90
91
92			/**
93			* Finalize MDCT and free allocated memory.
94			*
95			* @param s AC-3 encoder private context
96			*/
97		2	av_cold void ff_ac3_float_mdct_end(AC3EncodeContext *s)
98			{
99		2	ff_mdct_end(&s->mdct);
100		2	av_freep(&s->mdct_window);
101		2	}
102
103
104			/**
105			* Initialize MDCT tables.
106			*
107			* @param s AC-3 encoder private context
108			* @return 0 on success, negative error code on failure
109			*/
110		2	av_cold int ff_ac3_float_mdct_init(AC3EncodeContext *s)
111			{
112			float *window;
113			int i, n, n2;
114
115		2	n = 1 << 9;
116		2	n2 = n >> 1;
117
118		2	window = av_malloc_array(n, sizeof(*window));
119	✗✓	2	if (!window) {
120			av_log(s->avctx, AV_LOG_ERROR, "Cannot allocate memory.\n");
121			return AVERROR(ENOMEM);
122			}
123		2	ff_kbd_window_init(window, 5.0, n2);
124	✓✓	514	for (i = 0; i < n2; i++)
125		512	window[n-1-i] = window[i];
126		2	s->mdct_window = window;
127
128		2	return ff_mdct_init(&s->mdct, 9, 0, -2.0 / n);
129			}
130
131
132		2	av_cold int ff_ac3_float_encode_init(AVCodecContext *avctx)
133			{
134		2	AC3EncodeContext *s = avctx->priv_data;
135		2	s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
136	✗✓	2	if (!s->fdsp)
137			return AVERROR(ENOMEM);
138		2	return ff_ac3_encode_init(avctx);
139			}
140
141			AVCodec ff_ac3_encoder = {
142			.name = "ac3",
143			.long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
144			.type = AVMEDIA_TYPE_AUDIO,
145			.id = AV_CODEC_ID_AC3,
146			.priv_data_size = sizeof(AC3EncodeContext),
147			.init = ff_ac3_float_encode_init,
148			.encode2 = ff_ac3_float_encode_frame,
149			.close = ff_ac3_encode_close,
150			.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
151			AV_SAMPLE_FMT_NONE },
152			.priv_class = &ac3enc_class,
153			.channel_layouts = ff_ac3_channel_layouts,
154			.defaults = ac3_defaults,
155			};