mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
3469cfab4a
The dump_extra bitstream filter currently simply adds the extradata to the packets indicated by the user without checking whether said extradata already exists in the packets. Besides wasting space duplicated extradata in the same packet/access unit is also forbidden for some codecs, e.g. MPEG-2. This check has been added to be able to use the mpeg2_qsv encoder (which only adds the sequence headers to the first packet) in broadcast scenarios where repeating sequence headers are required. The check used here is not perfect: E.g. dump_extra would add the extradata to a H.264 access unit consisting of an access unit delimiter, SPS, PPS and slices. Fixes #8007. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
/*
|
|
* 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 "avcodec.h"
|
|
#include "bsf.h"
|
|
|
|
#include "libavutil/log.h"
|
|
#include "libavutil/mem.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,
|
|
};
|