| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (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 GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | /** | ||
| 20 | * @file | ||
| 21 | * Side data bitstream filter -- remove side data from packets and from the | ||
| 22 | * stream, or select packets by their side data. | ||
| 23 | */ | ||
| 24 | |||
| 25 | #include "libavcodec/bsf.h" | ||
| 26 | #include "libavcodec/bsf_internal.h" | ||
| 27 | #include "libavcodec/packet_internal.h" | ||
| 28 | |||
| 29 | #include "libavutil/opt.h" | ||
| 30 | |||
| 31 | typedef struct SideDataContext { | ||
| 32 | const AVClass *class; | ||
| 33 | |||
| 34 | int *remove; | ||
| 35 | unsigned nb_remove; | ||
| 36 | int *select; | ||
| 37 | unsigned nb_select; | ||
| 38 | } SideDataContext; | ||
| 39 | |||
| 40 | 5 | static int side_data_init(AVBSFContext *ctx) | |
| 41 | { | ||
| 42 | 5 | SideDataContext *s = ctx->priv_data; | |
| 43 | |||
| 44 |
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8 | for (unsigned i = 0; i < s->nb_remove; i++) |
| 45 | 3 | av_packet_side_data_remove(ctx->par_out->coded_side_data, | |
| 46 | 3 | &ctx->par_out->nb_coded_side_data, | |
| 47 | 3 | s->remove[i]); | |
| 48 | |||
| 49 | 5 | return 0; | |
| 50 | } | ||
| 51 | |||
| 52 | 100 | static int is_selected(const SideDataContext *s, const AVPacket *pkt) | |
| 53 | { | ||
| 54 |
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100 | if (!s->nb_select) |
| 55 | 32 | return 1; | |
| 56 | |||
| 57 |
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134 | for (unsigned i = 0; i < s->nb_select; i++) |
| 58 |
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68 | if (av_packet_side_data_get(pkt->side_data, pkt->side_data_elems, |
| 59 | 68 | s->select[i])) | |
| 60 | 2 | return 1; | |
| 61 | |||
| 62 | 66 | return 0; | |
| 63 | } | ||
| 64 | |||
| 65 | 135 | static int side_data_filter(AVBSFContext *ctx, AVPacket *pkt) | |
| 66 | { | ||
| 67 | 135 | SideDataContext *s = ctx->priv_data; | |
| 68 | 135 | int ret = ff_bsf_get_packet_ref(ctx, pkt); | |
| 69 | |||
| 70 |
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135 | if (ret < 0) |
| 71 | 35 | return ret; | |
| 72 | |||
| 73 |
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100 | if (!is_selected(s, pkt)) { |
| 74 | 66 | av_packet_unref(pkt); | |
| 75 | 66 | return AVERROR(EAGAIN); | |
| 76 | } | ||
| 77 | |||
| 78 |
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66 | for (unsigned i = 0; i < s->nb_remove; i++) |
| 79 | 32 | av_packet_side_data_remove(pkt->side_data, &pkt->side_data_elems, | |
| 80 | 32 | s->remove[i]); | |
| 81 | |||
| 82 | 34 | return 0; | |
| 83 | } | ||
| 84 | |||
| 85 | static const AVOptionArrayDef types_def = { .sep = '+' }; | ||
| 86 | |||
| 87 | #define OFFSET(x) offsetof(SideDataContext, x) | ||
| 88 | #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_BSF_PARAM) | ||
| 89 | #define TYPE_CONST(type, handle) \ | ||
| 90 | { handle, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_PKT_DATA_ ## type }, .flags = FLAGS, .unit = "type" }, | ||
| 91 | static const AVOption options[] = { | ||
| 92 | { "remove", "side data types to remove, joined with '+'", OFFSET(remove), AV_OPT_TYPE_INT | AV_OPT_TYPE_FLAG_ARRAY, { .arr = &types_def }, 0, AV_PKT_DATA_NB - 1, FLAGS, .unit = "type" }, | ||
| 93 | { "select", "side data types of the packets to keep, joined with '+'", OFFSET(select), AV_OPT_TYPE_INT | AV_OPT_TYPE_FLAG_ARRAY, { .arr = &types_def }, 0, AV_PKT_DATA_NB - 1, FLAGS, .unit = "type" }, | ||
| 94 | FF_PACKET_SIDE_DATA_HANDLES(TYPE_CONST) | ||
| 95 | { NULL }, | ||
| 96 | }; | ||
| 97 | |||
| 98 | static const AVClass side_data_class = { | ||
| 99 | .class_name = "side_data bsf", | ||
| 100 | .item_name = av_default_item_name, | ||
| 101 | .option = options, | ||
| 102 | .version = LIBAVUTIL_VERSION_INT, | ||
| 103 | }; | ||
| 104 | |||
| 105 | const FFBitStreamFilter ff_side_data_bsf = { | ||
| 106 | .p.name = "side_data", | ||
| 107 | .p.priv_class = &side_data_class, | ||
| 108 | .priv_data_size = sizeof(SideDataContext), | ||
| 109 | .init = side_data_init, | ||
| 110 | .filter = side_data_filter, | ||
| 111 | }; | ||
| 112 |