| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * audio encoder psychoacoustic model | ||
| 3 | * Copyright (C) 2008 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 "avcodec.h" | ||
| 23 | #include "psymodel.h" | ||
| 24 | #include "libavutil/mem.h" | ||
| 25 | |||
| 26 | extern const FFPsyModel ff_aac_psy_model; | ||
| 27 | |||
| 28 | 10 | av_cold int ff_psy_init(FFPsyContext *ctx, AVCodecContext *avctx, int num_lens, | |
| 29 | const uint8_t **bands, const int* num_bands, | ||
| 30 | int num_groups, const uint8_t *group_map) | ||
| 31 | { | ||
| 32 | 10 | int i, j, k = 0; | |
| 33 | |||
| 34 | 10 | ctx->avctx = avctx; | |
| 35 | 10 | ctx->ch = av_calloc(avctx->ch_layout.nb_channels, 2 * sizeof(ctx->ch[0])); | |
| 36 | 10 | ctx->group = av_calloc(num_groups, sizeof(ctx->group[0])); | |
| 37 | 10 | ctx->bands = av_memdup(bands, num_lens * sizeof(ctx->bands[0])); | |
| 38 | 10 | ctx->num_bands = av_memdup(num_bands, num_lens * sizeof(ctx->num_bands[0])); | |
| 39 | 10 | ctx->cutoff = avctx->cutoff; | |
| 40 | |||
| 41 |
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10 | if (!ctx->ch || !ctx->group || !ctx->bands || !ctx->num_bands) { |
| 42 | ✗ | ff_psy_end(ctx); | |
| 43 | ✗ | return AVERROR(ENOMEM); | |
| 44 | } | ||
| 45 | |||
| 46 | /* assign channels to groups (with virtual channels for coupling) */ | ||
| 47 |
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23 | for (i = 0; i < num_groups; i++) { |
| 48 | /* NOTE: Add 1 to handle the AAC chan_config without modification. | ||
| 49 | * This has the side effect of allowing an array of 0s to map | ||
| 50 | * to one channel per group. | ||
| 51 | */ | ||
| 52 | 13 | ctx->group[i].num_ch = group_map[i] + 1; | |
| 53 |
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59 | for (j = 0; j < ctx->group[i].num_ch * 2; j++) |
| 54 | 46 | ctx->group[i].ch[j] = &ctx->ch[k++]; | |
| 55 | } | ||
| 56 | |||
| 57 |
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10 | switch (ctx->avctx->codec_id) { |
| 58 | 10 | case AV_CODEC_ID_AAC: | |
| 59 | 10 | ctx->model = &ff_aac_psy_model; | |
| 60 | 10 | break; | |
| 61 | } | ||
| 62 |
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10 | if (ctx->model->init) |
| 63 | 10 | return ctx->model->init(ctx); | |
| 64 | ✗ | return 0; | |
| 65 | } | ||
| 66 | |||
| 67 | 5032 | FFPsyChannelGroup *ff_psy_find_group(FFPsyContext *ctx, int channel) | |
| 68 | { | ||
| 69 | 5032 | int i = 0, ch = 0; | |
| 70 | |||
| 71 |
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10496 | while (ch <= channel) |
| 72 | 5464 | ch += ctx->group[i++].num_ch; | |
| 73 | |||
| 74 | 5032 | return &ctx->group[i-1]; | |
| 75 | } | ||
| 76 | |||
| 77 | 10 | av_cold void ff_psy_end(FFPsyContext *ctx) | |
| 78 | { | ||
| 79 |
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10 | if (ctx->model && ctx->model->end) |
| 80 | 10 | ctx->model->end(ctx); | |
| 81 | 10 | av_freep(&ctx->bands); | |
| 82 | 10 | av_freep(&ctx->num_bands); | |
| 83 | 10 | av_freep(&ctx->group); | |
| 84 | 10 | av_freep(&ctx->ch); | |
| 85 | 10 | } | |
| 86 |