FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/pafaudio.c
Date: 2022-07-04 19:11:22
Exec Total Coverage
Lines: 21 25 84.0%
Branches: 9 12 75.0%

Line Branch Exec Source
1 /*
2 * Packed Animation File audio decoder
3 * Copyright (c) 2012 Paul B Mahol
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
25 #include "avcodec.h"
26 #include "codec_internal.h"
27 #include "internal.h"
28 #include "mathops.h"
29 #include "paf.h"
30
31 4 static av_cold int paf_audio_init(AVCodecContext *avctx)
32 {
33
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4 if (avctx->ch_layout.nb_channels != 2) {
34 av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
35 return AVERROR_INVALIDDATA;
36 }
37
38 4 av_channel_layout_uninit(&avctx->ch_layout);
39 4 avctx->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
40 4 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
41
42 4 return 0;
43 }
44
45 6 static int paf_audio_decode(AVCodecContext *avctx, AVFrame *frame,
46 int *got_frame, AVPacket *pkt)
47 {
48 int16_t *output_samples;
49 6 const uint8_t *src = pkt->data;
50 int frames, ret, i, j;
51 int16_t cb[256];
52
53 6 frames = pkt->size / PAF_SOUND_FRAME_SIZE;
54
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6 if (frames < 1)
55 return AVERROR_INVALIDDATA;
56
57 6 frame->nb_samples = PAF_SOUND_SAMPLES * frames;
58
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6 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
59 return ret;
60
61 6 output_samples = (int16_t *)frame->data[0];
62 // codebook of 256 16-bit samples and 8-bit indices to it
63
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162 for (j = 0; j < frames; j++) {
64
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40092 for (i = 0; i < 256; i++)
65 39936 cb[i] = sign_extend(AV_RL16(src + i * 2), 16);
66 156 src += 256 * 2;
67 // always 2 channels
68
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688116 for (i = 0; i < PAF_SOUND_SAMPLES * 2; i++)
69 687960 *output_samples++ = cb[*src++];
70 }
71 6 *got_frame = 1;
72
73 6 return pkt->size;
74 }
75
76 const FFCodec ff_paf_audio_decoder = {
77 .p.name = "paf_audio",
78 .p.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
79 .p.type = AVMEDIA_TYPE_AUDIO,
80 .p.id = AV_CODEC_ID_PAF_AUDIO,
81 .init = paf_audio_init,
82 FF_CODEC_DECODE_CB(paf_audio_decode),
83 .p.capabilities = AV_CODEC_CAP_DR1,
84 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
85 };
86