mirror of
https://github.com/FFmpeg/FFmpeg.git
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121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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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 "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "bsf.h"
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enum RemoveFreq {
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REMOVE_FREQ_KEYFRAME,
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REMOVE_FREQ_ALL,
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REMOVE_FREQ_NONKEYFRAME,
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};
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typedef struct RemoveExtradataContext {
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const AVClass *class;
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int freq;
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AVCodecParserContext *parser;
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AVCodecContext *avctx;
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} RemoveExtradataContext;
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static int remove_extradata(AVBSFContext *ctx, AVPacket *out)
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{
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RemoveExtradataContext *s = ctx->priv_data;
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AVPacket *in;
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int ret;
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ret = ff_bsf_get_packet(ctx, &in);
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if (ret < 0)
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return ret;
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if (s->parser && s->parser->parser->split) {
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if (s->freq == REMOVE_FREQ_ALL ||
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(s->freq == REMOVE_FREQ_NONKEYFRAME && !(in->flags & AV_PKT_FLAG_KEY)) ||
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(s->freq == REMOVE_FREQ_KEYFRAME && in->flags & AV_PKT_FLAG_KEY)) {
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int i = s->parser->parser->split(s->avctx, in->data, in->size);
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in->data += i;
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in->size -= i;
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}
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}
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av_packet_move_ref(out, in);
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av_packet_free(&in);
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return 0;
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}
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static int remove_extradata_init(AVBSFContext *ctx)
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{
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RemoveExtradataContext *s = ctx->priv_data;
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int ret;
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s->parser = av_parser_init(ctx->par_in->codec_id);
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if (s->parser) {
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s->avctx = avcodec_alloc_context3(NULL);
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if (!s->avctx)
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return AVERROR(ENOMEM);
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ret = avcodec_parameters_to_context(s->avctx, ctx->par_in);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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static void remove_extradata_close(AVBSFContext *ctx)
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{
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RemoveExtradataContext *s = ctx->priv_data;
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avcodec_free_context(&s->avctx);
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av_parser_close(s->parser);
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}
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#define OFFSET(x) offsetof(RemoveExtradataContext, x)
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static const AVOption options[] = {
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{ "freq", NULL, OFFSET(freq), AV_OPT_TYPE_INT, { .i64 = REMOVE_FREQ_KEYFRAME }, REMOVE_FREQ_KEYFRAME, REMOVE_FREQ_NONKEYFRAME, 0, "freq" },
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{ "k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_NONKEYFRAME }, .unit = "freq" },
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{ "keyframe", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_KEYFRAME }, .unit = "freq" },
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{ "e", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL }, .unit = "freq" },
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{ "all", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL }, .unit = "freq" },
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{ NULL },
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};
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static const AVClass remove_extradata_class = {
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.class_name = "remove_extradata",
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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_remove_extradata_bsf = {
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.name = "remove_extra",
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.priv_data_size = sizeof(RemoveExtradataContext),
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.priv_class = &remove_extradata_class,
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.init = remove_extradata_init,
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.close = remove_extradata_close,
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.filter = remove_extradata,
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};
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