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