| 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 | #include <stdbool.h> | ||
| 20 | #include <stdlib.h> | ||
| 21 | |||
| 22 | #include "libavutil/mem.h" | ||
| 23 | #include "libavutil/opt.h" | ||
| 24 | |||
| 25 | #include "bsf.h" | ||
| 26 | #include "bsf_internal.h" | ||
| 27 | #include "cbs.h" | ||
| 28 | |||
| 29 | |||
| 30 | typedef struct FilterUnitsContext { | ||
| 31 | const AVClass *class; | ||
| 32 | |||
| 33 | CodedBitstreamContext *cbc; | ||
| 34 | CodedBitstreamFragment fragment; | ||
| 35 | |||
| 36 | const char *pass_types; | ||
| 37 | const char *remove_types; | ||
| 38 | /* enum AVDiscard, use int for AVOption */ | ||
| 39 | int discard; | ||
| 40 | int discard_flags; | ||
| 41 | |||
| 42 | enum { | ||
| 43 | NOOP, | ||
| 44 | PASS, | ||
| 45 | REMOVE, | ||
| 46 | } mode; | ||
| 47 | CodedBitstreamUnitType *type_list; | ||
| 48 | int nb_types; | ||
| 49 | bool passthrough; | ||
| 50 | } FilterUnitsContext; | ||
| 51 | |||
| 52 | |||
| 53 | ✗ | static int filter_units_make_type_list(const char *list_string, | |
| 54 | CodedBitstreamUnitType **type_list, | ||
| 55 | int *nb_types) | ||
| 56 | { | ||
| 57 | ✗ | CodedBitstreamUnitType *list = NULL; | |
| 58 | int pass, count; | ||
| 59 | |||
| 60 | ✗ | for (pass = 1; pass <= 2; pass++) { | |
| 61 | long value, range_start, range_end; | ||
| 62 | const char *str; | ||
| 63 | char *value_end; | ||
| 64 | |||
| 65 | ✗ | count = 0; | |
| 66 | ✗ | for (str = list_string; *str;) { | |
| 67 | ✗ | value = strtol(str, &value_end, 0); | |
| 68 | ✗ | if (str == value_end) | |
| 69 | ✗ | goto invalid; | |
| 70 | ✗ | str = (const char *)value_end; | |
| 71 | ✗ | if (*str == '-') { | |
| 72 | ✗ | ++str; | |
| 73 | ✗ | range_start = value; | |
| 74 | ✗ | range_end = strtol(str, &value_end, 0); | |
| 75 | ✗ | if (str == value_end) | |
| 76 | ✗ | goto invalid; | |
| 77 | |||
| 78 | ✗ | for (value = range_start; value < range_end; value++) { | |
| 79 | ✗ | if (pass == 2) | |
| 80 | ✗ | list[count] = value; | |
| 81 | ✗ | ++count; | |
| 82 | } | ||
| 83 | } else { | ||
| 84 | ✗ | if (pass == 2) | |
| 85 | ✗ | list[count] = value; | |
| 86 | ✗ | ++count; | |
| 87 | } | ||
| 88 | ✗ | if (*str == '|') | |
| 89 | ✗ | ++str; | |
| 90 | } | ||
| 91 | ✗ | if (pass == 1) { | |
| 92 | ✗ | list = av_malloc_array(count, sizeof(*list)); | |
| 93 | ✗ | if (!list) | |
| 94 | ✗ | return AVERROR(ENOMEM); | |
| 95 | } | ||
| 96 | } | ||
| 97 | |||
| 98 | ✗ | *type_list = list; | |
| 99 | ✗ | *nb_types = count; | |
| 100 | ✗ | return 0; | |
| 101 | |||
| 102 | ✗ | invalid: | |
| 103 | ✗ | av_freep(&list); | |
| 104 | ✗ | return AVERROR(EINVAL); | |
| 105 | } | ||
| 106 | |||
| 107 | 838 | static int filter_units_filter(AVBSFContext *bsf, AVPacket *pkt) | |
| 108 | { | ||
| 109 | 838 | FilterUnitsContext *ctx = bsf->priv_data; | |
| 110 | 838 | CodedBitstreamFragment *frag = &ctx->fragment; | |
| 111 | int err, i, j; | ||
| 112 | |||
| 113 | 838 | err = ff_bsf_get_packet_ref(bsf, pkt); | |
| 114 |
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838 | if (err < 0) |
| 115 | 142 | return err; | |
| 116 | |||
| 117 |
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696 | if (ctx->passthrough) |
| 118 | ✗ | return 0; | |
| 119 | |||
| 120 | 696 | err = ff_cbs_read_packet(ctx->cbc, frag, pkt); | |
| 121 |
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696 | if (err < 0) { |
| 122 | ✗ | av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n"); | |
| 123 | ✗ | goto fail; | |
| 124 | } | ||
| 125 | |||
| 126 | 696 | ff_cbs_discard_units(ctx->cbc, frag, ctx->discard, ctx->discard_flags); | |
| 127 |
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696 | if (ctx->mode != NOOP) { |
| 128 | ✗ | for (i = frag->nb_units - 1; i >= 0; i--) { | |
| 129 | ✗ | for (j = 0; j < ctx->nb_types; j++) { | |
| 130 | ✗ | if (frag->units[i].type == ctx->type_list[j]) | |
| 131 | ✗ | break; | |
| 132 | } | ||
| 133 | ✗ | if (ctx->mode == REMOVE ? j < ctx->nb_types | |
| 134 | ✗ | : j >= ctx->nb_types) | |
| 135 | ✗ | ff_cbs_delete_unit(frag, i); | |
| 136 | } | ||
| 137 | } | ||
| 138 | |||
| 139 |
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696 | if (frag->nb_units == 0) { |
| 140 | // Don't return packets with nothing in them. | ||
| 141 | 562 | err = AVERROR(EAGAIN); | |
| 142 | 562 | goto fail; | |
| 143 | } | ||
| 144 | |||
| 145 | 134 | err = ff_cbs_write_packet(ctx->cbc, pkt, frag); | |
| 146 |
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134 | if (err < 0) { |
| 147 | ✗ | av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n"); | |
| 148 | ✗ | goto fail; | |
| 149 | } | ||
| 150 | |||
| 151 | 134 | fail: | |
| 152 |
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696 | if (err < 0) |
| 153 | 562 | av_packet_unref(pkt); | |
| 154 | 696 | ff_cbs_fragment_reset(frag); | |
| 155 | |||
| 156 | 696 | return err; | |
| 157 | } | ||
| 158 | |||
| 159 | 8 | static int filter_units_init(AVBSFContext *bsf) | |
| 160 | { | ||
| 161 | 8 | FilterUnitsContext *ctx = bsf->priv_data; | |
| 162 | int err; | ||
| 163 | |||
| 164 |
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8 | if (ctx->pass_types && ctx->remove_types) { |
| 165 | ✗ | av_log(bsf, AV_LOG_ERROR, "Exactly one of pass_types or " | |
| 166 | "remove_types is required.\n"); | ||
| 167 | ✗ | return AVERROR(EINVAL); | |
| 168 | } | ||
| 169 | |||
| 170 |
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8 | if (ctx->pass_types) { |
| 171 | ✗ | ctx->mode = PASS; | |
| 172 | ✗ | err = filter_units_make_type_list(ctx->pass_types, | |
| 173 | &ctx->type_list, &ctx->nb_types); | ||
| 174 | ✗ | if (err < 0) { | |
| 175 | ✗ | av_log(bsf, AV_LOG_ERROR, "Failed to parse pass_types.\n"); | |
| 176 | ✗ | return err; | |
| 177 | } | ||
| 178 |
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8 | } else if (ctx->remove_types) { |
| 179 | ✗ | ctx->mode = REMOVE; | |
| 180 | ✗ | err = filter_units_make_type_list(ctx->remove_types, | |
| 181 | &ctx->type_list, &ctx->nb_types); | ||
| 182 | ✗ | if (err < 0) { | |
| 183 | ✗ | av_log(bsf, AV_LOG_ERROR, "Failed to parse remove_types.\n"); | |
| 184 | ✗ | return err; | |
| 185 | } | ||
| 186 |
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8 | } else if (ctx->discard == AVDISCARD_NONE) { |
| 187 | ✗ | ctx->passthrough = true; | |
| 188 | ✗ | return 0; | |
| 189 | } | ||
| 190 | |||
| 191 | 8 | err = ff_cbs_init(&ctx->cbc, bsf->par_in->codec_id, bsf); | |
| 192 |
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8 | if (err < 0) |
| 193 | ✗ | return err; | |
| 194 | |||
| 195 |
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8 | if (ctx->discard == AVDISCARD_NONE) { |
| 196 | // Don't actually decompose anything, we only want the unit data. | ||
| 197 | ✗ | ctx->cbc->decompose_unit_types = ctx->type_list; | |
| 198 | ✗ | ctx->cbc->nb_decompose_unit_types = 0; | |
| 199 | } | ||
| 200 | |||
| 201 |
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8 | if (bsf->par_in->extradata) { |
| 202 | 8 | CodedBitstreamFragment *frag = &ctx->fragment; | |
| 203 | |||
| 204 | 8 | err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in); | |
| 205 |
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8 | if (err < 0) { |
| 206 | ✗ | av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n"); | |
| 207 | } else { | ||
| 208 | 8 | err = ff_cbs_write_extradata(ctx->cbc, bsf->par_out, frag); | |
| 209 |
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8 | if (err < 0) |
| 210 | ✗ | av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n"); | |
| 211 | } | ||
| 212 | |||
| 213 | 8 | ff_cbs_fragment_reset(frag); | |
| 214 | } | ||
| 215 | |||
| 216 | 8 | return err; | |
| 217 | } | ||
| 218 | |||
| 219 | 8 | static void filter_units_close(AVBSFContext *bsf) | |
| 220 | { | ||
| 221 | 8 | FilterUnitsContext *ctx = bsf->priv_data; | |
| 222 | |||
| 223 | 8 | av_freep(&ctx->type_list); | |
| 224 | |||
| 225 | 8 | ff_cbs_fragment_free(&ctx->fragment); | |
| 226 | 8 | ff_cbs_close(&ctx->cbc); | |
| 227 | 8 | } | |
| 228 | |||
| 229 | #define OFFSET(x) offsetof(FilterUnitsContext, x) | ||
| 230 | #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM) | ||
| 231 | static const AVOption filter_units_options[] = { | ||
| 232 | { "pass_types", "List of unit types to pass through the filter.", | ||
| 233 | OFFSET(pass_types), AV_OPT_TYPE_STRING, | ||
| 234 | { .str = NULL }, .flags = FLAGS }, | ||
| 235 | { "remove_types", "List of unit types to remove in the filter.", | ||
| 236 | OFFSET(remove_types), AV_OPT_TYPE_STRING, | ||
| 237 | { .str = NULL }, .flags = FLAGS }, | ||
| 238 | |||
| 239 | { "discard", "Remove the selected frames", | ||
| 240 | OFFSET(discard), AV_OPT_TYPE_INT, | ||
| 241 | { .i64 = AVDISCARD_NONE }, INT_MIN, INT_MAX, FLAGS, .unit = "discard"}, | ||
| 242 | { "none" , "discard none", | ||
| 243 | 0, AV_OPT_TYPE_CONST, | ||
| 244 | { .i64 = AVDISCARD_NONE }, INT_MIN, INT_MAX, FLAGS, .unit = "discard"}, | ||
| 245 | { "default" , "discard none, but can be changed after dynamically", | ||
| 246 | 0, AV_OPT_TYPE_CONST, | ||
| 247 | { .i64 = AVDISCARD_DEFAULT }, INT_MIN, INT_MAX, FLAGS, .unit = "discard"}, | ||
| 248 | { "nonref", "discard all non-reference frames", | ||
| 249 | 0, AV_OPT_TYPE_CONST, | ||
| 250 | { .i64 = AVDISCARD_NONREF }, INT_MIN, INT_MAX, FLAGS, .unit = "discard"}, | ||
| 251 | { "bidir", "discard all bidirectional frames", | ||
| 252 | 0, AV_OPT_TYPE_CONST, | ||
| 253 | { .i64 = AVDISCARD_BIDIR }, INT_MIN, INT_MAX, FLAGS, .unit = "discard"}, | ||
| 254 | { "nonintra", "discard all frames except I frames", | ||
| 255 | 0, AV_OPT_TYPE_CONST, | ||
| 256 | { .i64 = AVDISCARD_NONINTRA }, INT_MIN, INT_MAX, FLAGS, .unit = "discard"}, | ||
| 257 | { "nonkey", "discard all frames except keyframes", | ||
| 258 | 0, AV_OPT_TYPE_CONST, | ||
| 259 | { .i64 = AVDISCARD_NONKEY }, INT_MIN, INT_MAX, FLAGS, .unit = "discard"}, | ||
| 260 | { "all", "discard all frames", | ||
| 261 | 0, AV_OPT_TYPE_CONST, | ||
| 262 | { .i64 = AVDISCARD_ALL }, INT_MIN, INT_MAX, FLAGS, .unit = "discard"}, | ||
| 263 | |||
| 264 | { "discard_flags", "flags to control the discard frame behavior", | ||
| 265 | OFFSET(discard_flags), AV_OPT_TYPE_FLAGS, | ||
| 266 | { .i64 = DISCARD_FLAG_NONE }, INT_MIN, INT_MAX, FLAGS, .unit = "discard_flags"}, | ||
| 267 | { "keep_non_vcl", "non-vcl units even if the picture has been dropped", | ||
| 268 | 0, AV_OPT_TYPE_CONST, | ||
| 269 | { .i64 = DISCARD_FLAG_KEEP_NON_VCL }, INT_MIN, INT_MAX, FLAGS, .unit = "discard_flags"}, | ||
| 270 | { NULL } | ||
| 271 | }; | ||
| 272 | |||
| 273 | static const AVClass filter_units_class = { | ||
| 274 | .class_name = "filter_units", | ||
| 275 | .item_name = av_default_item_name, | ||
| 276 | .option = filter_units_options, | ||
| 277 | .version = LIBAVUTIL_VERSION_INT, | ||
| 278 | }; | ||
| 279 | |||
| 280 | const FFBitStreamFilter ff_filter_units_bsf = { | ||
| 281 | .p.name = "filter_units", | ||
| 282 | .p.codec_ids = ff_cbs_all_codec_ids, | ||
| 283 | .p.priv_class = &filter_units_class, | ||
| 284 | .priv_data_size = sizeof(FilterUnitsContext), | ||
| 285 | .init = &filter_units_init, | ||
| 286 | .close = &filter_units_close, | ||
| 287 | .filter = &filter_units_filter, | ||
| 288 | }; | ||
| 289 |