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GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/atrac3plusdec.c	Lines:	122	195	62.6 %
Date:	2020-01-28 04:56:05	Branches:	50	90	55.6 %


/*
 * ATRAC3+ compatible decoder
 *
 * Copyright (c) 2010-2013 Maxim Poliakovski
 *
 * 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
 * Sony ATRAC3+ compatible decoder.
 *
 * Container formats used to store its data:
 * RIFF WAV (.at3) and Sony OpenMG (.oma, .aa3).
 *
 * Technical description of this codec can be found here:
 * http://wiki.multimedia.cx/index.php?title=ATRAC3plus
 *
 * Kudos to Benjamin Larsson and Michael Karcher
 * for their precious technical help!
 */

#include <stdint.h>
#include <string.h>

#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "atrac.h"
#include "atrac3plus.h"

typedef struct ATRAC3PContext {
    GetBitContext gb;
    AVFloatDSPContext *fdsp;

    DECLARE_ALIGNED(32, float, samples)[2][ATRAC3P_FRAME_SAMPLES];  ///< quantized MDCT spectrum
    DECLARE_ALIGNED(32, float, mdct_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< output of the IMDCT
    DECLARE_ALIGNED(32, float, time_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< output of the gain compensation
    DECLARE_ALIGNED(32, float, outp_buf)[2][ATRAC3P_FRAME_SAMPLES];

    AtracGCContext gainc_ctx;   ///< gain compensation context
    FFTContext mdct_ctx;
    FFTContext ipqf_dct_ctx;    ///< IDCT context used by IPQF

    Atrac3pChanUnitCtx *ch_units;   ///< global channel units

    int num_channel_blocks;     ///< number of channel blocks
    uint8_t channel_blocks[5];  ///< channel configuration descriptor
    uint64_t my_channel_layout; ///< current channel layout
} ATRAC3PContext;

static av_cold int atrac3p_decode_close(AVCodecContext *avctx)
{
    ATRAC3PContext *ctx = avctx->priv_data;

    av_freep(&ctx->ch_units);
    av_freep(&ctx->fdsp);

    ff_mdct_end(&ctx->mdct_ctx);
    ff_mdct_end(&ctx->ipqf_dct_ctx);

    return 0;
}

static av_cold int set_channel_params(ATRAC3PContext *ctx,
                                      AVCodecContext *avctx)
{
    memset(ctx->channel_blocks, 0, sizeof(ctx->channel_blocks));

    switch (avctx->channels) {
    case 1:
        if (avctx->channel_layout != AV_CH_FRONT_LEFT)
            avctx->channel_layout = AV_CH_LAYOUT_MONO;

        ctx->num_channel_blocks = 1;
        ctx->channel_blocks[0]  = CH_UNIT_MONO;
        break;
    case 2:
        avctx->channel_layout   = AV_CH_LAYOUT_STEREO;
        ctx->num_channel_blocks = 1;
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
        break;
    case 3:
        avctx->channel_layout   = AV_CH_LAYOUT_SURROUND;
        ctx->num_channel_blocks = 2;
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
        break;
    case 4:
        avctx->channel_layout   = AV_CH_LAYOUT_4POINT0;
        ctx->num_channel_blocks = 3;
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
        ctx->channel_blocks[2]  = CH_UNIT_MONO;
        break;
    case 6:
        avctx->channel_layout   = AV_CH_LAYOUT_5POINT1_BACK;
        ctx->num_channel_blocks = 4;
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
        ctx->channel_blocks[2]  = CH_UNIT_STEREO;
        ctx->channel_blocks[3]  = CH_UNIT_MONO;
        break;
    case 7:
        avctx->channel_layout   = AV_CH_LAYOUT_6POINT1_BACK;
        ctx->num_channel_blocks = 5;
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
        ctx->channel_blocks[2]  = CH_UNIT_STEREO;
        ctx->channel_blocks[3]  = CH_UNIT_MONO;
        ctx->channel_blocks[4]  = CH_UNIT_MONO;
        break;
    case 8:
        avctx->channel_layout   = AV_CH_LAYOUT_7POINT1;
        ctx->num_channel_blocks = 5;
        ctx->channel_blocks[0]  = CH_UNIT_STEREO;
        ctx->channel_blocks[1]  = CH_UNIT_MONO;
        ctx->channel_blocks[2]  = CH_UNIT_STEREO;
        ctx->channel_blocks[3]  = CH_UNIT_STEREO;
        ctx->channel_blocks[4]  = CH_UNIT_MONO;
        break;
    default:
        av_log(avctx, AV_LOG_ERROR,
               "Unsupported channel count: %d!\n", avctx->channels);
        return AVERROR_INVALIDDATA;
    }

    return 0;
}

static av_cold int atrac3p_decode_init(AVCodecContext *avctx)
{
    ATRAC3PContext *ctx = avctx->priv_data;
    int i, ch, ret;

    if (!avctx->block_align) {
        av_log(avctx, AV_LOG_ERROR, "block_align is not set\n");
        return AVERROR(EINVAL);
    }

    ff_atrac3p_init_vlcs();

    /* initialize IPQF */
    ff_mdct_init(&ctx->ipqf_dct_ctx, 5, 1, 32.0 / 32768.0);

    ff_atrac3p_init_imdct(avctx, &ctx->mdct_ctx);

    ff_atrac_init_gain_compensation(&ctx->gainc_ctx, 6, 2);

    ff_atrac3p_init_wave_synth();

    if ((ret = set_channel_params(ctx, avctx)) < 0)
        return ret;

    ctx->my_channel_layout = avctx->channel_layout;

    ctx->ch_units = av_mallocz_array(ctx->num_channel_blocks, sizeof(*ctx->ch_units));
    ctx->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);

    if (!ctx->ch_units || !ctx->fdsp) {
        return AVERROR(ENOMEM);
    }

    for (i = 0; i < ctx->num_channel_blocks; i++) {
        for (ch = 0; ch < 2; ch++) {
            ctx->ch_units[i].channels[ch].ch_num          = ch;
            ctx->ch_units[i].channels[ch].wnd_shape       = &ctx->ch_units[i].channels[ch].wnd_shape_hist[0][0];
            ctx->ch_units[i].channels[ch].wnd_shape_prev  = &ctx->ch_units[i].channels[ch].wnd_shape_hist[1][0];
            ctx->ch_units[i].channels[ch].gain_data       = &ctx->ch_units[i].channels[ch].gain_data_hist[0][0];
            ctx->ch_units[i].channels[ch].gain_data_prev  = &ctx->ch_units[i].channels[ch].gain_data_hist[1][0];
            ctx->ch_units[i].channels[ch].tones_info      = &ctx->ch_units[i].channels[ch].tones_info_hist[0][0];
            ctx->ch_units[i].channels[ch].tones_info_prev = &ctx->ch_units[i].channels[ch].tones_info_hist[1][0];
        }

        ctx->ch_units[i].waves_info      = &ctx->ch_units[i].wave_synth_hist[0];
        ctx->ch_units[i].waves_info_prev = &ctx->ch_units[i].wave_synth_hist[1];
    }

    avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;

    return 0;
}

static void decode_residual_spectrum(ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit,
                                     float out[2][ATRAC3P_FRAME_SAMPLES],
                                     int num_channels,
                                     AVCodecContext *avctx)
{
    int i, sb, ch, qu, nspeclines, RNG_index;
    float *dst, q;
    int16_t *src;
    /* calculate RNG table index for each subband */
    int sb_RNG_index[ATRAC3P_SUBBANDS] = { 0 };

    if (ch_unit->mute_flag) {
        for (ch = 0; ch < num_channels; ch++)
            memset(out[ch], 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out[ch]));
        return;
    }

    for (qu = 0, RNG_index = 0; qu < ch_unit->used_quant_units; qu++)
        RNG_index += ch_unit->channels[0].qu_sf_idx[qu] +
                     ch_unit->channels[1].qu_sf_idx[qu];

    for (sb = 0; sb < ch_unit->num_coded_subbands; sb++, RNG_index += 128)
        sb_RNG_index[sb] = RNG_index & 0x3FC;

    /* inverse quant and power compensation */
    for (ch = 0; ch < num_channels; ch++) {
        /* clear channel's residual spectrum */
        memset(out[ch], 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out[ch]));

        for (qu = 0; qu < ch_unit->used_quant_units; qu++) {
            src        = &ch_unit->channels[ch].spectrum[ff_atrac3p_qu_to_spec_pos[qu]];
            dst        = &out[ch][ff_atrac3p_qu_to_spec_pos[qu]];
            nspeclines = ff_atrac3p_qu_to_spec_pos[qu + 1] -
                         ff_atrac3p_qu_to_spec_pos[qu];

            if (ch_unit->channels[ch].qu_wordlen[qu] > 0) {
                q = ff_atrac3p_sf_tab[ch_unit->channels[ch].qu_sf_idx[qu]] *
                    ff_atrac3p_mant_tab[ch_unit->channels[ch].qu_wordlen[qu]];
                for (i = 0; i < nspeclines; i++)
                    dst[i] = src[i] * q;
            }
        }

        for (sb = 0; sb < ch_unit->num_coded_subbands; sb++)
            ff_atrac3p_power_compensation(ch_unit, ctx->fdsp, ch, &out[ch][0],
                                          sb_RNG_index[sb], sb);
    }

    if (ch_unit->unit_type == CH_UNIT_STEREO) {
        for (sb = 0; sb < ch_unit->num_coded_subbands; sb++) {
            if (ch_unit->swap_channels[sb]) {
                for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++)
                    FFSWAP(float, out[0][sb * ATRAC3P_SUBBAND_SAMPLES + i],
                                  out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i]);
            }

            /* flip coefficients' sign if requested */
            if (ch_unit->negate_coeffs[sb])
                for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++)
                    out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i] = -(out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i]);
        }
    }
}

static void reconstruct_frame(ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit,
                              int num_channels, AVCodecContext *avctx)
{
    int ch, sb;

    for (ch = 0; ch < num_channels; ch++) {
        for (sb = 0; sb < ch_unit->num_subbands; sb++) {
            /* inverse transform and windowing */
            ff_atrac3p_imdct(ctx->fdsp, &ctx->mdct_ctx,
                             &ctx->samples[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
                             &ctx->mdct_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
                             (ch_unit->channels[ch].wnd_shape_prev[sb] << 1) +
                             ch_unit->channels[ch].wnd_shape[sb], sb);

            /* gain compensation and overlapping */
            ff_atrac_gain_compensation(&ctx->gainc_ctx,
                                       &ctx->mdct_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
                                       &ch_unit->prev_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
                                       &ch_unit->channels[ch].gain_data_prev[sb],
                                       &ch_unit->channels[ch].gain_data[sb],
                                       ATRAC3P_SUBBAND_SAMPLES,
                                       &ctx->time_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES]);
        }

        /* zero unused subbands in both output and overlapping buffers */
        memset(&ch_unit->prev_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES],
               0,
               (ATRAC3P_SUBBANDS - ch_unit->num_subbands) *
               ATRAC3P_SUBBAND_SAMPLES *
               sizeof(ch_unit->prev_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES]));
        memset(&ctx->time_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES],
               0,
               (ATRAC3P_SUBBANDS - ch_unit->num_subbands) *
               ATRAC3P_SUBBAND_SAMPLES *
               sizeof(ctx->time_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES]));

        /* resynthesize and add tonal signal */
        if (ch_unit->waves_info->tones_present ||
            ch_unit->waves_info_prev->tones_present) {
            for (sb = 0; sb < ch_unit->num_subbands; sb++)
                if (ch_unit->channels[ch].tones_info[sb].num_wavs ||
                    ch_unit->channels[ch].tones_info_prev[sb].num_wavs) {
                    ff_atrac3p_generate_tones(ch_unit, ctx->fdsp, ch, sb,
                                              &ctx->time_buf[ch][sb * 128]);
                }
        }

        /* subband synthesis and acoustic signal output */
        ff_atrac3p_ipqf(&ctx->ipqf_dct_ctx, &ch_unit->ipqf_ctx[ch],
                        &ctx->time_buf[ch][0], &ctx->outp_buf[ch][0]);
    }

    /* swap window shape and gain control buffers. */
    for (ch = 0; ch < num_channels; ch++) {
        FFSWAP(uint8_t *, ch_unit->channels[ch].wnd_shape,
               ch_unit->channels[ch].wnd_shape_prev);
        FFSWAP(AtracGainInfo *, ch_unit->channels[ch].gain_data,
               ch_unit->channels[ch].gain_data_prev);
        FFSWAP(Atrac3pWavesData *, ch_unit->channels[ch].tones_info,
               ch_unit->channels[ch].tones_info_prev);
    }

    FFSWAP(Atrac3pWaveSynthParams *, ch_unit->waves_info, ch_unit->waves_info_prev);
}

static int atrac3p_decode_frame(AVCodecContext *avctx, void *data,
                                int *got_frame_ptr, AVPacket *avpkt)
{
    ATRAC3PContext *ctx = avctx->priv_data;
    AVFrame *frame      = data;
    int i, ret, ch_unit_id, ch_block = 0, out_ch_index = 0, channels_to_process;
    float **samples_p = (float **)frame->extended_data;

    frame->nb_samples = ATRAC3P_FRAME_SAMPLES;
    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
        return ret;

    if ((ret = init_get_bits8(&ctx->gb, avpkt->data, avpkt->size)) < 0)
        return ret;

    if (get_bits1(&ctx->gb)) {
        av_log(avctx, AV_LOG_ERROR, "Invalid start bit!\n");
        return AVERROR_INVALIDDATA;
    }

    while (get_bits_left(&ctx->gb) >= 2 &&
           (ch_unit_id = get_bits(&ctx->gb, 2)) != CH_UNIT_TERMINATOR) {
        if (ch_unit_id == CH_UNIT_EXTENSION) {
            avpriv_report_missing_feature(avctx, "Channel unit extension");
            return AVERROR_PATCHWELCOME;
        }
        if (ch_block >= ctx->num_channel_blocks ||
            ctx->channel_blocks[ch_block] != ch_unit_id) {
            av_log(avctx, AV_LOG_ERROR,
                   "Frame data doesn't match channel configuration!\n");
            return AVERROR_INVALIDDATA;
        }

        ctx->ch_units[ch_block].unit_type = ch_unit_id;
        channels_to_process               = ch_unit_id + 1;

        if ((ret = ff_atrac3p_decode_channel_unit(&ctx->gb,
                                                  &ctx->ch_units[ch_block],
                                                  channels_to_process,
                                                  avctx)) < 0)
            return ret;

        decode_residual_spectrum(ctx, &ctx->ch_units[ch_block], ctx->samples,
                                 channels_to_process, avctx);
        reconstruct_frame(ctx, &ctx->ch_units[ch_block],
                          channels_to_process, avctx);

        for (i = 0; i < channels_to_process; i++)
            memcpy(samples_p[out_ch_index + i], ctx->outp_buf[i],
                   ATRAC3P_FRAME_SAMPLES * sizeof(**samples_p));

        ch_block++;
        out_ch_index += channels_to_process;
    }

    *got_frame_ptr = 1;

    return avctx->codec_id == AV_CODEC_ID_ATRAC3P ? FFMIN(avctx->block_align, avpkt->size) : avpkt->size;
}

AVCodec ff_atrac3p_decoder = {
    .name           = "atrac3plus",
    .long_name      = NULL_IF_CONFIG_SMALL("ATRAC3+ (Adaptive TRansform Acoustic Coding 3+)"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_ATRAC3P,
    .capabilities   = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
    .priv_data_size = sizeof(ATRAC3PContext),
    .init           = atrac3p_decode_init,
    .close          = atrac3p_decode_close,
    .decode         = atrac3p_decode_frame,
};

AVCodec ff_atrac3pal_decoder = {
    .name           = "atrac3plusal",
    .long_name      = NULL_IF_CONFIG_SMALL("ATRAC3+ AL (Adaptive TRansform Acoustic Coding 3+ Advanced Lossless)"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_ATRAC3PAL,
    .capabilities   = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
    .priv_data_size = sizeof(ATRAC3PContext),
    .init           = atrac3p_decode_init,
    .close          = atrac3p_decode_close,
    .decode         = atrac3p_decode_frame,
};


Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/*
2			* ATRAC3+ compatible decoder
3			*
4			* Copyright (c) 2010-2013 Maxim Poliakovski
5			*
6			* This file is part of FFmpeg.
7			*
8			* FFmpeg is free software; you can redistribute it and/or
9			* modify it under the terms of the GNU Lesser General Public
10			* License as published by the Free Software Foundation; either
11			* version 2.1 of the License, or (at your option) any later version.
12			*
13			* FFmpeg is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16			* Lesser General Public License for more details.
17			*
18			* You should have received a copy of the GNU Lesser General Public
19			* License along with FFmpeg; if not, write to the Free Software
20			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21			*/
22
23			/**
24			* @file
25			* Sony ATRAC3+ compatible decoder.
26			*
27			* Container formats used to store its data:
28			* RIFF WAV (.at3) and Sony OpenMG (.oma, .aa3).
29			*
30			* Technical description of this codec can be found here:
31			* http://wiki.multimedia.cx/index.php?title=ATRAC3plus
32			*
33			* Kudos to Benjamin Larsson and Michael Karcher
34			* for their precious technical help!
35			*/
36
37			#include <stdint.h>
38			#include <string.h>
39
40			#include "libavutil/channel_layout.h"
41			#include "libavutil/float_dsp.h"
42			#include "avcodec.h"
43			#include "get_bits.h"
44			#include "internal.h"
45			#include "atrac.h"
46			#include "atrac3plus.h"
47
48			typedef struct ATRAC3PContext {
49			GetBitContext gb;
50			AVFloatDSPContext *fdsp;
51
52			DECLARE_ALIGNED(32, float, samples)[2][ATRAC3P_FRAME_SAMPLES]; ///< quantized MDCT spectrum
53			DECLARE_ALIGNED(32, float, mdct_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< output of the IMDCT
54			DECLARE_ALIGNED(32, float, time_buf)[2][ATRAC3P_FRAME_SAMPLES]; ///< output of the gain compensation
55			DECLARE_ALIGNED(32, float, outp_buf)[2][ATRAC3P_FRAME_SAMPLES];
56
57			AtracGCContext gainc_ctx; ///< gain compensation context
58			FFTContext mdct_ctx;
59			FFTContext ipqf_dct_ctx; ///< IDCT context used by IPQF
60
61			Atrac3pChanUnitCtx *ch_units; ///< global channel units
62
63			int num_channel_blocks; ///< number of channel blocks
64			uint8_t channel_blocks[5]; ///< channel configuration descriptor
65			uint64_t my_channel_layout; ///< current channel layout
66			} ATRAC3PContext;
67
68		4	static av_cold int atrac3p_decode_close(AVCodecContext *avctx)
69			{
70		4	ATRAC3PContext *ctx = avctx->priv_data;
71
72		4	av_freep(&ctx->ch_units);
73		4	av_freep(&ctx->fdsp);
74
75		4	ff_mdct_end(&ctx->mdct_ctx);
76		4	ff_mdct_end(&ctx->ipqf_dct_ctx);
77
78		4	return 0;
79			}
80
81		4	static av_cold int set_channel_params(ATRAC3PContext *ctx,
82			AVCodecContext *avctx)
83			{
84		4	memset(ctx->channel_blocks, 0, sizeof(ctx->channel_blocks));
85
86	✗✓✗✗ ✗✗✗✗	4	switch (avctx->channels) {
87			case 1:
88			if (avctx->channel_layout != AV_CH_FRONT_LEFT)
89			avctx->channel_layout = AV_CH_LAYOUT_MONO;
90
91			ctx->num_channel_blocks = 1;
92			ctx->channel_blocks[0] = CH_UNIT_MONO;
93			break;
94		4	case 2:
95		4	avctx->channel_layout = AV_CH_LAYOUT_STEREO;
96		4	ctx->num_channel_blocks = 1;
97		4	ctx->channel_blocks[0] = CH_UNIT_STEREO;
98		4	break;
99			case 3:
100			avctx->channel_layout = AV_CH_LAYOUT_SURROUND;
101			ctx->num_channel_blocks = 2;
102			ctx->channel_blocks[0] = CH_UNIT_STEREO;
103			ctx->channel_blocks[1] = CH_UNIT_MONO;
104			break;
105			case 4:
106			avctx->channel_layout = AV_CH_LAYOUT_4POINT0;
107			ctx->num_channel_blocks = 3;
108			ctx->channel_blocks[0] = CH_UNIT_STEREO;
109			ctx->channel_blocks[1] = CH_UNIT_MONO;
110			ctx->channel_blocks[2] = CH_UNIT_MONO;
111			break;
112			case 6:
113			avctx->channel_layout = AV_CH_LAYOUT_5POINT1_BACK;
114			ctx->num_channel_blocks = 4;
115			ctx->channel_blocks[0] = CH_UNIT_STEREO;
116			ctx->channel_blocks[1] = CH_UNIT_MONO;
117			ctx->channel_blocks[2] = CH_UNIT_STEREO;
118			ctx->channel_blocks[3] = CH_UNIT_MONO;
119			break;
120			case 7:
121			avctx->channel_layout = AV_CH_LAYOUT_6POINT1_BACK;
122			ctx->num_channel_blocks = 5;
123			ctx->channel_blocks[0] = CH_UNIT_STEREO;
124			ctx->channel_blocks[1] = CH_UNIT_MONO;
125			ctx->channel_blocks[2] = CH_UNIT_STEREO;
126			ctx->channel_blocks[3] = CH_UNIT_MONO;
127			ctx->channel_blocks[4] = CH_UNIT_MONO;
128			break;
129			case 8:
130			avctx->channel_layout = AV_CH_LAYOUT_7POINT1;
131			ctx->num_channel_blocks = 5;
132			ctx->channel_blocks[0] = CH_UNIT_STEREO;
133			ctx->channel_blocks[1] = CH_UNIT_MONO;
134			ctx->channel_blocks[2] = CH_UNIT_STEREO;
135			ctx->channel_blocks[3] = CH_UNIT_STEREO;
136			ctx->channel_blocks[4] = CH_UNIT_MONO;
137			break;
138			default:
139			av_log(avctx, AV_LOG_ERROR,
140			"Unsupported channel count: %d!\n", avctx->channels);
141			return AVERROR_INVALIDDATA;
142			}
143
144		4	return 0;
145			}
146
147		4	static av_cold int atrac3p_decode_init(AVCodecContext *avctx)
148			{
149		4	ATRAC3PContext *ctx = avctx->priv_data;
150			int i, ch, ret;
151
152	✗✓	4	if (!avctx->block_align) {
153			av_log(avctx, AV_LOG_ERROR, "block_align is not set\n");
154			return AVERROR(EINVAL);
155			}
156
157		4	ff_atrac3p_init_vlcs();
158
159			/* initialize IPQF */
160		4	ff_mdct_init(&ctx->ipqf_dct_ctx, 5, 1, 32.0 / 32768.0);
161
162		4	ff_atrac3p_init_imdct(avctx, &ctx->mdct_ctx);
163
164		4	ff_atrac_init_gain_compensation(&ctx->gainc_ctx, 6, 2);
165
166		4	ff_atrac3p_init_wave_synth();
167
168	✗✓	4	if ((ret = set_channel_params(ctx, avctx)) < 0)
169			return ret;
170
171		4	ctx->my_channel_layout = avctx->channel_layout;
172
173		4	ctx->ch_units = av_mallocz_array(ctx->num_channel_blocks, sizeof(*ctx->ch_units));
174		4	ctx->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
175
176	✓✗✗✓	4	if (!ctx->ch_units \|\| !ctx->fdsp) {
177			return AVERROR(ENOMEM);
178			}
179
180	✓✓	8	for (i = 0; i < ctx->num_channel_blocks; i++) {
181	✓✓	12	for (ch = 0; ch < 2; ch++) {
182		8	ctx->ch_units[i].channels[ch].ch_num = ch;
183		8	ctx->ch_units[i].channels[ch].wnd_shape = &ctx->ch_units[i].channels[ch].wnd_shape_hist[0][0];
184		8	ctx->ch_units[i].channels[ch].wnd_shape_prev = &ctx->ch_units[i].channels[ch].wnd_shape_hist[1][0];
185		8	ctx->ch_units[i].channels[ch].gain_data = &ctx->ch_units[i].channels[ch].gain_data_hist[0][0];
186		8	ctx->ch_units[i].channels[ch].gain_data_prev = &ctx->ch_units[i].channels[ch].gain_data_hist[1][0];
187		8	ctx->ch_units[i].channels[ch].tones_info = &ctx->ch_units[i].channels[ch].tones_info_hist[0][0];
188		8	ctx->ch_units[i].channels[ch].tones_info_prev = &ctx->ch_units[i].channels[ch].tones_info_hist[1][0];
189			}
190
191		4	ctx->ch_units[i].waves_info = &ctx->ch_units[i].wave_synth_hist[0];
192		4	ctx->ch_units[i].waves_info_prev = &ctx->ch_units[i].wave_synth_hist[1];
193			}
194
195		4	avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
196
197		4	return 0;
198			}
199
200		813	static void decode_residual_spectrum(ATRAC3PContext ctx, Atrac3pChanUnitCtx ch_unit,
201			float out[2][ATRAC3P_FRAME_SAMPLES],
202			int num_channels,
203			AVCodecContext *avctx)
204			{
205			int i, sb, ch, qu, nspeclines, RNG_index;
206			float *dst, q;
207			int16_t *src;
208			/* calculate RNG table index for each subband */
209		813	int sb_RNG_index[ATRAC3P_SUBBANDS] = { 0 };
210
211	✗✓	813	if (ch_unit->mute_flag) {
212			for (ch = 0; ch < num_channels; ch++)
213			memset(out[ch], 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out[ch]));
214			return;
215			}
216
217	✓✓	22793	for (qu = 0, RNG_index = 0; qu < ch_unit->used_quant_units; qu++)
218		21980	RNG_index += ch_unit->channels[0].qu_sf_idx[qu] +
219		21980	ch_unit->channels[1].qu_sf_idx[qu];
220
221	✓✓	10377	for (sb = 0; sb < ch_unit->num_coded_subbands; sb++, RNG_index += 128)
222		9564	sb_RNG_index[sb] = RNG_index & 0x3FC;
223
224			/* inverse quant and power compensation */
225	✓✓	2439	for (ch = 0; ch < num_channels; ch++) {
226			/* clear channel's residual spectrum */
227		1626	memset(out[ch], 0, ATRAC3P_FRAME_SAMPLES * sizeof(*out[ch]));
228
229	✓✓	45586	for (qu = 0; qu < ch_unit->used_quant_units; qu++) {
230		43960	src = &ch_unit->channels[ch].spectrum[ff_atrac3p_qu_to_spec_pos[qu]];
231		43960	dst = &out[ch][ff_atrac3p_qu_to_spec_pos[qu]];
232		43960	nspeclines = ff_atrac3p_qu_to_spec_pos[qu + 1] -
233		43960	ff_atrac3p_qu_to_spec_pos[qu];
234
235	✓✗	43960	if (ch_unit->channels[ch].qu_wordlen[qu] > 0) {
236		43960	q = ff_atrac3p_sf_tab[ch_unit->channels[ch].qu_sf_idx[qu]] *
237		43960	ff_atrac3p_mant_tab[ch_unit->channels[ch].qu_wordlen[qu]];
238	✓✓	2492344	for (i = 0; i < nspeclines; i++)
239		2448384	dst[i] = src[i] * q;
240			}
241			}
242
243	✓✓	20754	for (sb = 0; sb < ch_unit->num_coded_subbands; sb++)
244		19128	ff_atrac3p_power_compensation(ch_unit, ctx->fdsp, ch, &out[ch][0],
245			sb_RNG_index[sb], sb);
246			}
247
248	✓✗	813	if (ch_unit->unit_type == CH_UNIT_STEREO) {
249	✓✓	10377	for (sb = 0; sb < ch_unit->num_coded_subbands; sb++) {
250	✗✓	9564	if (ch_unit->swap_channels[sb]) {
251			for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++)
252			FFSWAP(float, out[0][sb * ATRAC3P_SUBBAND_SAMPLES + i],
253			out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i]);
254			}
255
256			/* flip coefficients' sign if requested */
257	✗✓	9564	if (ch_unit->negate_coeffs[sb])
258			for (i = 0; i < ATRAC3P_SUBBAND_SAMPLES; i++)
259			out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i] = -(out[1][sb * ATRAC3P_SUBBAND_SAMPLES + i]);
260			}
261			}
262			}
263
264		813	static void reconstruct_frame(ATRAC3PContext ctx, Atrac3pChanUnitCtx ch_unit,
265			int num_channels, AVCodecContext *avctx)
266			{
267			int ch, sb;
268
269	✓✓	2439	for (ch = 0; ch < num_channels; ch++) {
270	✓✓	23298	for (sb = 0; sb < ch_unit->num_subbands; sb++) {
271			/* inverse transform and windowing */
272		21672	ff_atrac3p_imdct(ctx->fdsp, &ctx->mdct_ctx,
273		21672	&ctx->samples[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
274		21672	&ctx->mdct_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
275		21672	(ch_unit->channels[ch].wnd_shape_prev[sb] << 1) +
276		21672	ch_unit->channels[ch].wnd_shape[sb], sb);
277
278			/* gain compensation and overlapping */
279		21672	ff_atrac_gain_compensation(&ctx->gainc_ctx,
280		21672	&ctx->mdct_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
281		21672	&ch_unit->prev_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES],
282		21672	&ch_unit->channels[ch].gain_data_prev[sb],
283		21672	&ch_unit->channels[ch].gain_data[sb],
284			ATRAC3P_SUBBAND_SAMPLES,
285		21672	&ctx->time_buf[ch][sb * ATRAC3P_SUBBAND_SAMPLES]);
286			}
287
288			/* zero unused subbands in both output and overlapping buffers */
289		1626	memset(&ch_unit->prev_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES],
290			0,
291		1626	(ATRAC3P_SUBBANDS - ch_unit->num_subbands) *
292			ATRAC3P_SUBBAND_SAMPLES *
293			sizeof(ch_unit->prev_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES]));
294		1626	memset(&ctx->time_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES],
295			0,
296		1626	(ATRAC3P_SUBBANDS - ch_unit->num_subbands) *
297			ATRAC3P_SUBBAND_SAMPLES *
298			sizeof(ctx->time_buf[ch][ch_unit->num_subbands * ATRAC3P_SUBBAND_SAMPLES]));
299
300			/* resynthesize and add tonal signal */
301	✓✗	1626	if (ch_unit->waves_info->tones_present \|\|
302	✗✓	1626	ch_unit->waves_info_prev->tones_present) {
303			for (sb = 0; sb < ch_unit->num_subbands; sb++)
304			if (ch_unit->channels[ch].tones_info[sb].num_wavs \|\|
305			ch_unit->channels[ch].tones_info_prev[sb].num_wavs) {
306			ff_atrac3p_generate_tones(ch_unit, ctx->fdsp, ch, sb,
307			&ctx->time_buf[ch][sb * 128]);
308			}
309			}
310
311			/* subband synthesis and acoustic signal output */
312		1626	ff_atrac3p_ipqf(&ctx->ipqf_dct_ctx, &ch_unit->ipqf_ctx[ch],
313		1626	&ctx->time_buf[ch][0], &ctx->outp_buf[ch][0]);
314			}
315
316			/* swap window shape and gain control buffers. */
317	✓✓	2439	for (ch = 0; ch < num_channels; ch++) {
318		1626	FFSWAP(uint8_t *, ch_unit->channels[ch].wnd_shape,
319			ch_unit->channels[ch].wnd_shape_prev);
320		1626	FFSWAP(AtracGainInfo *, ch_unit->channels[ch].gain_data,
321			ch_unit->channels[ch].gain_data_prev);
322		1626	FFSWAP(Atrac3pWavesData *, ch_unit->channels[ch].tones_info,
323			ch_unit->channels[ch].tones_info_prev);
324			}
325
326		813	FFSWAP(Atrac3pWaveSynthParams *, ch_unit->waves_info, ch_unit->waves_info_prev);
327		813	}
328
329		813	static int atrac3p_decode_frame(AVCodecContext avctx, void data,
330			int got_frame_ptr, AVPacket avpkt)
331			{
332		813	ATRAC3PContext *ctx = avctx->priv_data;
333		813	AVFrame *frame = data;
334		813	int i, ret, ch_unit_id, ch_block = 0, out_ch_index = 0, channels_to_process;
335		813	float samples_p = (float )frame->extended_data;
336
337		813	frame->nb_samples = ATRAC3P_FRAME_SAMPLES;
338	✗✓	813	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
339			return ret;
340
341	✗✓	813	if ((ret = init_get_bits8(&ctx->gb, avpkt->data, avpkt->size)) < 0)
342			return ret;
343
344	✗✓	813	if (get_bits1(&ctx->gb)) {
345			av_log(avctx, AV_LOG_ERROR, "Invalid start bit!\n");
346			return AVERROR_INVALIDDATA;
347			}
348
349	✓✓	1626	while (get_bits_left(&ctx->gb) >= 2 &&
350	✓✓	1625	(ch_unit_id = get_bits(&ctx->gb, 2)) != CH_UNIT_TERMINATOR) {
351	✗✓	813	if (ch_unit_id == CH_UNIT_EXTENSION) {
352			avpriv_report_missing_feature(avctx, "Channel unit extension");
353			return AVERROR_PATCHWELCOME;
354			}
355	✓✗	813	if (ch_block >= ctx->num_channel_blocks \|\|
356	✗✓	813	ctx->channel_blocks[ch_block] != ch_unit_id) {
357			av_log(avctx, AV_LOG_ERROR,
358			"Frame data doesn't match channel configuration!\n");
359			return AVERROR_INVALIDDATA;
360			}
361
362		813	ctx->ch_units[ch_block].unit_type = ch_unit_id;
363		813	channels_to_process = ch_unit_id + 1;
364
365	✗✓	813	if ((ret = ff_atrac3p_decode_channel_unit(&ctx->gb,
366		813	&ctx->ch_units[ch_block],
367			channels_to_process,
368			avctx)) < 0)
369			return ret;
370
371		813	decode_residual_spectrum(ctx, &ctx->ch_units[ch_block], ctx->samples,
372			channels_to_process, avctx);
373		813	reconstruct_frame(ctx, &ctx->ch_units[ch_block],
374			channels_to_process, avctx);
375
376	✓✓	2439	for (i = 0; i < channels_to_process; i++)
377		1626	memcpy(samples_p[out_ch_index + i], ctx->outp_buf[i],
378			ATRAC3P_FRAME_SAMPLES * sizeof(**samples_p));
379
380		813	ch_block++;
381		813	out_ch_index += channels_to_process;
382			}
383
384		813	*got_frame_ptr = 1;
385
386	✓✗	813	return avctx->codec_id == AV_CODEC_ID_ATRAC3P ? FFMIN(avctx->block_align, avpkt->size) : avpkt->size;
387			}
388
389			AVCodec ff_atrac3p_decoder = {
390			.name = "atrac3plus",
391			.long_name = NULL_IF_CONFIG_SMALL("ATRAC3+ (Adaptive TRansform Acoustic Coding 3+)"),
392			.type = AVMEDIA_TYPE_AUDIO,
393			.id = AV_CODEC_ID_ATRAC3P,
394			.capabilities = AV_CODEC_CAP_DR1,
395			.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
396			.priv_data_size = sizeof(ATRAC3PContext),
397			.init = atrac3p_decode_init,
398			.close = atrac3p_decode_close,
399			.decode = atrac3p_decode_frame,
400			};
401
402			AVCodec ff_atrac3pal_decoder = {
403			.name = "atrac3plusal",
404			.long_name = NULL_IF_CONFIG_SMALL("ATRAC3+ AL (Adaptive TRansform Acoustic Coding 3+ Advanced Lossless)"),
405			.type = AVMEDIA_TYPE_AUDIO,
406			.id = AV_CODEC_ID_ATRAC3PAL,
407			.capabilities = AV_CODEC_CAP_DR1,
408			.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
409			.priv_data_size = sizeof(ATRAC3PContext),
410			.init = atrac3p_decode_init,
411			.close = atrac3p_decode_close,
412			.decode = atrac3p_decode_frame,
413			};