| /* |
| * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <string.h> |
| |
| #include "bsf.h" |
| #include "bsf_internal.h" |
| |
| #include "libavutil/log.h" |
| #include "libavutil/opt.h" |
| |
| enum DumpFreq { |
| DUMP_FREQ_KEYFRAME, |
| DUMP_FREQ_ALL, |
| }; |
| |
| typedef struct DumpExtradataContext { |
| const AVClass *class; |
| AVPacket pkt; |
| int freq; |
| } DumpExtradataContext; |
| |
| static int dump_extradata(AVBSFContext *ctx, AVPacket *out) |
| { |
| DumpExtradataContext *s = ctx->priv_data; |
| AVPacket *in = &s->pkt; |
| int ret = 0; |
| |
| ret = ff_bsf_get_packet_ref(ctx, in); |
| if (ret < 0) |
| return ret; |
| |
| if (ctx->par_in->extradata && |
| (s->freq == DUMP_FREQ_ALL || |
| (s->freq == DUMP_FREQ_KEYFRAME && in->flags & AV_PKT_FLAG_KEY)) && |
| (in->size < ctx->par_in->extradata_size || |
| memcmp(in->data, ctx->par_in->extradata, ctx->par_in->extradata_size))) { |
| if (in->size >= INT_MAX - ctx->par_in->extradata_size) { |
| ret = AVERROR(ERANGE); |
| goto fail; |
| } |
| |
| ret = av_new_packet(out, in->size + ctx->par_in->extradata_size); |
| if (ret < 0) |
| goto fail; |
| |
| ret = av_packet_copy_props(out, in); |
| if (ret < 0) { |
| av_packet_unref(out); |
| goto fail; |
| } |
| |
| memcpy(out->data, ctx->par_in->extradata, ctx->par_in->extradata_size); |
| memcpy(out->data + ctx->par_in->extradata_size, in->data, in->size); |
| } else { |
| av_packet_move_ref(out, in); |
| } |
| |
| fail: |
| av_packet_unref(in); |
| |
| return ret; |
| } |
| |
| #define OFFSET(x) offsetof(DumpExtradataContext, x) |
| #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM) |
| static const AVOption options[] = { |
| { "freq", "When to dump extradata", OFFSET(freq), AV_OPT_TYPE_INT, |
| { .i64 = DUMP_FREQ_KEYFRAME }, DUMP_FREQ_KEYFRAME, DUMP_FREQ_ALL, FLAGS, "freq" }, |
| { "k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = DUMP_FREQ_KEYFRAME }, .flags = FLAGS, .unit = "freq" }, |
| { "keyframe", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = DUMP_FREQ_KEYFRAME }, .flags = FLAGS, .unit = "freq" }, |
| { "e", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = DUMP_FREQ_ALL }, .flags = FLAGS, .unit = "freq" }, |
| { "all", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = DUMP_FREQ_ALL }, .flags = FLAGS, .unit = "freq" }, |
| { NULL }, |
| }; |
| |
| static const AVClass dump_extradata_class = { |
| .class_name = "dump_extradata bsf", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| const AVBitStreamFilter ff_dump_extradata_bsf = { |
| .name = "dump_extra", |
| .priv_data_size = sizeof(DumpExtradataContext), |
| .priv_class = &dump_extradata_class, |
| .filter = dump_extradata, |
| }; |