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/*
* 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 "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#if FF_API_OLD_BSF
FF_DISABLE_DEPRECATION_WARNINGS
const AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f)
{
const AVBitStreamFilter *filter = NULL;
void *opaque = NULL;
while (filter != f)
filter = av_bsf_next(&opaque);
return av_bsf_next(&opaque);
}
void av_register_bitstream_filter(AVBitStreamFilter *bsf)
{
}
typedef struct BSFCompatContext {
AVBSFContext *ctx;
int extradata_updated;
} BSFCompatContext;
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)
{
AVBitStreamFilterContext *ctx = NULL;
BSFCompatContext *priv = NULL;
const AVBitStreamFilter *bsf;
bsf = av_bsf_get_by_name(name);
if (!bsf)
return NULL;
ctx = av_mallocz(sizeof(*ctx));
if (!ctx)
return NULL;
priv = av_mallocz(sizeof(*priv));
if (!priv)
goto fail;
ctx->filter = bsf;
ctx->priv_data = priv;
return ctx;
fail:
if (priv)
av_bsf_free(&priv->ctx);
av_freep(&priv);
av_freep(&ctx);
return NULL;
}
void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc)
{
BSFCompatContext *priv;
if (!bsfc)
return;
priv = bsfc->priv_data;
av_bsf_free(&priv->ctx);
av_freep(&bsfc->priv_data);
av_free(bsfc);
}
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe)
{
BSFCompatContext *priv = bsfc->priv_data;
AVPacket pkt = { 0 };
int ret;
if (!priv->ctx) {
ret = av_bsf_alloc(bsfc->filter, &priv->ctx);
if (ret < 0)
return ret;
ret = avcodec_parameters_from_context(priv->ctx->par_in, avctx);
if (ret < 0)
return ret;
priv->ctx->time_base_in = avctx->time_base;
if (bsfc->args && bsfc->filter->priv_class) {
const AVOption *opt = av_opt_next(priv->ctx->priv_data, NULL);
const char * shorthand[2] = {NULL};
if (opt)
shorthand[0] = opt->name;
ret = av_opt_set_from_string(priv->ctx->priv_data, bsfc->args, shorthand, "=", ":");
if (ret < 0)
return ret;
}
ret = av_bsf_init(priv->ctx);
if (ret < 0)
return ret;
}
pkt.data = (uint8_t *)buf;
pkt.size = buf_size;
ret = av_bsf_send_packet(priv->ctx, &pkt);
if (ret < 0)
return ret;
*poutbuf = NULL;
*poutbuf_size = 0;
ret = av_bsf_receive_packet(priv->ctx, &pkt);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
return 0;
else if (ret < 0)
return ret;
*poutbuf = av_malloc(pkt.size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!*poutbuf) {
av_packet_unref(&pkt);
return AVERROR(ENOMEM);
}
*poutbuf_size = pkt.size;
memcpy(*poutbuf, pkt.data, pkt.size);
av_packet_unref(&pkt);
/* drain all the remaining packets we cannot return */
while (ret >= 0) {
ret = av_bsf_receive_packet(priv->ctx, &pkt);
av_packet_unref(&pkt);
}
if (!priv->extradata_updated) {
/* update extradata in avctx from the output codec parameters */
if (priv->ctx->par_out->extradata_size && (!args || !strstr(args, "private_spspps_buf"))) {
av_freep(&avctx->extradata);
avctx->extradata_size = 0;
avctx->extradata = av_mallocz(priv->ctx->par_out->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata)
return AVERROR(ENOMEM);
memcpy(avctx->extradata, priv->ctx->par_out->extradata, priv->ctx->par_out->extradata_size);
avctx->extradata_size = priv->ctx->par_out->extradata_size;
}
priv->extradata_updated = 1;
}
return 1;
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
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