| /* |
| * 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 "libavutil/log.h" |
| #include "libavutil/opt.h" |
| |
| #include "avcodec.h" |
| #include "bsf.h" |
| #include "bsf_internal.h" |
| |
| enum RemoveFreq { |
| REMOVE_FREQ_KEYFRAME, |
| REMOVE_FREQ_ALL, |
| REMOVE_FREQ_NONKEYFRAME, |
| }; |
| |
| typedef struct RemoveExtradataContext { |
| const AVClass *class; |
| int freq; |
| |
| AVCodecParserContext *parser; |
| AVCodecContext *avctx; |
| } RemoveExtradataContext; |
| |
| static int remove_extradata(AVBSFContext *ctx, AVPacket *pkt) |
| { |
| RemoveExtradataContext *s = ctx->priv_data; |
| |
| int ret; |
| |
| ret = ff_bsf_get_packet_ref(ctx, pkt); |
| if (ret < 0) |
| return ret; |
| |
| if (s->parser && s->parser->parser->split) { |
| if (s->freq == REMOVE_FREQ_ALL || |
| (s->freq == REMOVE_FREQ_NONKEYFRAME && !(pkt->flags & AV_PKT_FLAG_KEY)) || |
| (s->freq == REMOVE_FREQ_KEYFRAME && pkt->flags & AV_PKT_FLAG_KEY)) { |
| int i = s->parser->parser->split(s->avctx, pkt->data, pkt->size); |
| pkt->data += i; |
| pkt->size -= i; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int remove_extradata_init(AVBSFContext *ctx) |
| { |
| RemoveExtradataContext *s = ctx->priv_data; |
| int ret; |
| |
| s->parser = av_parser_init(ctx->par_in->codec_id); |
| |
| if (s->parser) { |
| s->avctx = avcodec_alloc_context3(NULL); |
| if (!s->avctx) |
| return AVERROR(ENOMEM); |
| |
| ret = avcodec_parameters_to_context(s->avctx, ctx->par_in); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void remove_extradata_close(AVBSFContext *ctx) |
| { |
| RemoveExtradataContext *s = ctx->priv_data; |
| |
| avcodec_free_context(&s->avctx); |
| av_parser_close(s->parser); |
| } |
| |
| #define OFFSET(x) offsetof(RemoveExtradataContext, x) |
| #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM) |
| static const AVOption options[] = { |
| { "freq", NULL, OFFSET(freq), AV_OPT_TYPE_INT, { .i64 = REMOVE_FREQ_KEYFRAME }, REMOVE_FREQ_KEYFRAME, REMOVE_FREQ_NONKEYFRAME, FLAGS, "freq" }, |
| { "k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_NONKEYFRAME }, .flags = FLAGS, .unit = "freq" }, |
| { "keyframe", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_KEYFRAME }, .flags = FLAGS, .unit = "freq" }, |
| { "e", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL }, .flags = FLAGS, .unit = "freq" }, |
| { "all", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL }, .flags = FLAGS, .unit = "freq" }, |
| { NULL }, |
| }; |
| |
| static const AVClass remove_extradata_class = { |
| .class_name = "remove_extradata", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| const AVBitStreamFilter ff_remove_extradata_bsf = { |
| .name = "remove_extra", |
| .priv_data_size = sizeof(RemoveExtradataContext), |
| .priv_class = &remove_extradata_class, |
| .init = remove_extradata_init, |
| .close = remove_extradata_close, |
| .filter = remove_extradata, |
| }; |