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https://github.com/FFmpeg/FFmpeg.git
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33d18982fa
Deprecate the current bitstream filtering API.
164 lines
4.2 KiB
C
164 lines
4.2 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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "avcodec.h"
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#include "libavutil/internal.h"
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#include "libavutil/mem.h"
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#if FF_API_OLD_BSF
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FF_DISABLE_DEPRECATION_WARNINGS
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AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f)
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{
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const AVBitStreamFilter *filter = NULL;
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void *opaque = NULL;
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while (filter != f)
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filter = av_bsf_next(&opaque);
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return av_bsf_next(&opaque);
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}
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void av_register_bitstream_filter(AVBitStreamFilter *bsf)
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{
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}
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typedef struct BSFCompatContext {
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AVBSFContext *ctx;
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} BSFCompatContext;
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AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)
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{
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AVBitStreamFilterContext *ctx = NULL;
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BSFCompatContext *priv = NULL;
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const AVBitStreamFilter *bsf;
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bsf = av_bsf_get_by_name(name);
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if (!bsf)
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return NULL;
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ctx = av_mallocz(sizeof(*ctx));
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if (!ctx)
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return NULL;
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priv = av_mallocz(sizeof(*priv));
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if (!priv)
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goto fail;
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ctx->filter = bsf;
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ctx->priv_data = priv;
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return ctx;
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fail:
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if (priv)
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av_bsf_free(&priv->ctx);
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av_freep(&priv);
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av_freep(&ctx);
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return NULL;
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}
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void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc)
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{
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BSFCompatContext *priv = bsfc->priv_data;
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av_bsf_free(&priv->ctx);
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av_freep(&bsfc->priv_data);
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av_free(bsfc);
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}
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int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
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AVCodecContext *avctx, const char *args,
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uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size, int keyframe)
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{
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BSFCompatContext *priv = bsfc->priv_data;
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AVPacket pkt = { 0 };
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int ret;
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if (!priv->ctx) {
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ret = av_bsf_alloc(bsfc->filter, &priv->ctx);
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if (ret < 0)
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return ret;
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ret = avcodec_parameters_from_context(priv->ctx->par_in, avctx);
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if (ret < 0)
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return ret;
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priv->ctx->time_base_in = avctx->time_base;
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ret = av_bsf_init(priv->ctx);
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if (ret < 0)
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return ret;
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if (priv->ctx->par_out->extradata_size) {
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av_freep(&avctx->extradata);
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avctx->extradata_size = 0;
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avctx->extradata = av_mallocz(priv->ctx->par_out->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!avctx->extradata)
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return AVERROR(ENOMEM);
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memcpy(avctx->extradata, priv->ctx->par_out->extradata,
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priv->ctx->par_out->extradata_size);
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avctx->extradata_size = priv->ctx->par_out->extradata_size;
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}
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}
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pkt.data = buf;
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pkt.size = buf_size;
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ret = av_bsf_send_packet(priv->ctx, &pkt);
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if (ret < 0)
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return ret;
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*poutbuf = NULL;
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*poutbuf_size = 0;
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ret = av_bsf_receive_packet(priv->ctx, &pkt);
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if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
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return 0;
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else if (ret < 0)
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return ret;
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*poutbuf = av_malloc(pkt.size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!*poutbuf) {
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av_packet_unref(&pkt);
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return AVERROR(ENOMEM);
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}
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*poutbuf_size = pkt.size;
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memcpy(*poutbuf, pkt.data, pkt.size);
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av_packet_unref(&pkt);
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/* drain all the remaining packets we cannot return */
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while (ret >= 0) {
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ret = av_bsf_receive_packet(priv->ctx, &pkt);
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av_packet_unref(&pkt);
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}
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return 1;
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}
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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