blob: fa7bc86e1911c460b3bea41178f61edde2324d4a
| 1 | /* |
| 2 | * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include <string.h> |
| 22 | |
| 23 | #include "avcodec.h" |
| 24 | #include "bsf.h" |
| 25 | |
| 26 | #include "libavutil/log.h" |
| 27 | #include "libavutil/mem.h" |
| 28 | #include "libavutil/opt.h" |
| 29 | |
| 30 | enum DumpFreq { |
| 31 | DUMP_FREQ_KEYFRAME, |
| 32 | DUMP_FREQ_ALL, |
| 33 | }; |
| 34 | |
| 35 | typedef struct DumpExtradataContext { |
| 36 | const AVClass *class; |
| 37 | int freq; |
| 38 | } DumpExtradataContext; |
| 39 | |
| 40 | static int dump_extradata(AVBSFContext *ctx, AVPacket *out) |
| 41 | { |
| 42 | DumpExtradataContext *s = ctx->priv_data; |
| 43 | AVPacket *in; |
| 44 | int ret = 0; |
| 45 | |
| 46 | ret = ff_bsf_get_packet(ctx, &in); |
| 47 | if (ret < 0) |
| 48 | return ret; |
| 49 | |
| 50 | if (ctx->par_in->extradata && |
| 51 | (s->freq == DUMP_FREQ_ALL || |
| 52 | (s->freq == DUMP_FREQ_KEYFRAME && in->flags & AV_PKT_FLAG_KEY))) { |
| 53 | if (in->size >= INT_MAX - ctx->par_in->extradata_size) { |
| 54 | ret = AVERROR(ERANGE); |
| 55 | goto fail; |
| 56 | } |
| 57 | |
| 58 | ret = av_new_packet(out, in->size + ctx->par_in->extradata_size); |
| 59 | if (ret < 0) |
| 60 | goto fail; |
| 61 | |
| 62 | ret = av_packet_copy_props(out, in); |
| 63 | if (ret < 0) { |
| 64 | av_packet_unref(out); |
| 65 | goto fail; |
| 66 | } |
| 67 | |
| 68 | memcpy(out->data, ctx->par_in->extradata, ctx->par_in->extradata_size); |
| 69 | memcpy(out->data + ctx->par_in->extradata_size, in->data, in->size); |
| 70 | } else { |
| 71 | av_packet_move_ref(out, in); |
| 72 | } |
| 73 | |
| 74 | fail: |
| 75 | av_packet_free(&in); |
| 76 | |
| 77 | return ret; |
| 78 | } |
| 79 | |
| 80 | #define OFFSET(x) offsetof(DumpExtradataContext, x) |
| 81 | static const AVOption options[] = { |
| 82 | { "freq", "When do dump extradata", OFFSET(freq), AV_OPT_TYPE_INT, |
| 83 | { .i64 = DUMP_FREQ_KEYFRAME }, DUMP_FREQ_KEYFRAME, DUMP_FREQ_ALL, 0, "freq" }, |
| 84 | { "k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = DUMP_FREQ_KEYFRAME }, .unit = "freq" }, |
| 85 | { "keyframe", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = DUMP_FREQ_KEYFRAME }, .unit = "freq" }, |
| 86 | { "e", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = DUMP_FREQ_ALL }, .unit = "freq" }, |
| 87 | { "all", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = DUMP_FREQ_ALL }, .unit = "freq" }, |
| 88 | { NULL }, |
| 89 | }; |
| 90 | |
| 91 | static const AVClass dump_extradata_class = { |
| 92 | .class_name = "dump_extradata bsf", |
| 93 | .item_name = av_default_item_name, |
| 94 | .option = options, |
| 95 | .version = LIBAVUTIL_VERSION_MAJOR, |
| 96 | }; |
| 97 | |
| 98 | const AVBitStreamFilter ff_dump_extradata_bsf = { |
| 99 | .name = "dump_extra", |
| 100 | .priv_data_size = sizeof(DumpExtradataContext), |
| 101 | .priv_class = &dump_extradata_class, |
| 102 | .filter = dump_extradata, |
| 103 | }; |
| 104 |