| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or modify | ||
| 5 | * it under the terms of the GNU General Public License as published by | ||
| 6 | * the Free Software Foundation; either version 2 of the License, or | ||
| 7 | * (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 12 | * GNU General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU General Public License along | ||
| 15 | * with FFmpeg; if not, write to the Free Software Foundation, Inc., | ||
| 16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 17 | */ | ||
| 18 | |||
| 19 | #include <stdint.h> | ||
| 20 | |||
| 21 | #include "libavutil/frame.h" | ||
| 22 | #include "libavutil/mem.h" | ||
| 23 | #include "libavutil/video_enc_params.h" | ||
| 24 | |||
| 25 | #include "qp_table.h" | ||
| 26 | |||
| 27 | 47 | int ff_qp_table_extract(AVFrame *frame, int8_t **table, int *table_w, int *table_h, | |
| 28 | enum AVVideoEncParamsType *qscale_type) | ||
| 29 | { | ||
| 30 | AVFrameSideData *sd; | ||
| 31 | AVVideoEncParams *par; | ||
| 32 | 47 | unsigned int mb_h = (frame->height + 15) / 16; | |
| 33 | 47 | unsigned int mb_w = (frame->width + 15) / 16; | |
| 34 | 47 | unsigned int nb_mb = mb_h * mb_w; | |
| 35 | unsigned int block_idx; | ||
| 36 | |||
| 37 | 47 | *table = NULL; | |
| 38 | |||
| 39 | 47 | sd = av_frame_get_side_data(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS); | |
| 40 |
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47 | if (!sd) |
| 41 | 20 | return 0; | |
| 42 | 27 | par = (AVVideoEncParams*)sd->data; | |
| 43 |
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27 | if (par->type != AV_VIDEO_ENC_PARAMS_MPEG2 || |
| 44 |
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27 | (par->nb_blocks != 0 && par->nb_blocks != nb_mb)) |
| 45 | ✗ | return AVERROR(ENOSYS); | |
| 46 | |||
| 47 | 27 | *table = av_malloc(nb_mb); | |
| 48 |
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27 | if (!*table) |
| 49 | ✗ | return AVERROR(ENOMEM); | |
| 50 |
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27 | if (table_w) |
| 51 | 27 | *table_w = mb_w; | |
| 52 |
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27 | if (table_h) |
| 53 | ✗ | *table_h = mb_h; | |
| 54 |
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27 | if (qscale_type) |
| 55 | 7 | *qscale_type = par->type; | |
| 56 | |||
| 57 |
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27 | if (par->nb_blocks == 0) { |
| 58 | 5 | memset(*table, par->qp, nb_mb); | |
| 59 | 5 | return 0; | |
| 60 | } | ||
| 61 | |||
| 62 |
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8734 | for (block_idx = 0; block_idx < nb_mb; block_idx++) { |
| 63 | 8712 | AVVideoBlockParams *b = av_video_enc_params_block(par, block_idx); | |
| 64 | 8712 | (*table)[block_idx] = par->qp + b->delta_qp; | |
| 65 | } | ||
| 66 | |||
| 67 | 22 | return 0; | |
| 68 | } | ||
| 69 | |||
| 70 |