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/*
* 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 "bsf_internal.h"
#include "cbs_bsf.h"
static int cbs_bsf_update_side_data(AVBSFContext *bsf, AVPacket *pkt)
{
CBSBSFContext *ctx = bsf->priv_data;
CodedBitstreamFragment *frag = &ctx->fragment;
uint8_t *side_data;
buffer_size_t side_data_size;
int err;
side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
&side_data_size);
if (!side_data_size)
return 0;
err = ff_cbs_read(ctx->input, frag, side_data, side_data_size);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR,
"Failed to read extradata from packet side data.\n");
return err;
}
err = ctx->type->update_fragment(bsf, NULL, frag);
if (err < 0)
return err;
err = ff_cbs_write_fragment_data(ctx->output, frag);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR,
"Failed to write extradata into packet side data.\n");
return err;
}
side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
frag->data_size);
if (!side_data)
return AVERROR(ENOMEM);
memcpy(side_data, frag->data, frag->data_size);
ff_cbs_fragment_reset(frag);
return 0;
}
int ff_cbs_bsf_generic_filter(AVBSFContext *bsf, AVPacket *pkt)
{
CBSBSFContext *ctx = bsf->priv_data;
CodedBitstreamFragment *frag = &ctx->fragment;
int err;
err = ff_bsf_get_packet_ref(bsf, pkt);
if (err < 0)
return err;
err = cbs_bsf_update_side_data(bsf, pkt);
if (err < 0)
goto fail;
err = ff_cbs_read_packet(ctx->input, frag, pkt);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to read %s from packet.\n",
ctx->type->fragment_name);
goto fail;
}
if (frag->nb_units == 0) {
av_log(bsf, AV_LOG_ERROR, "No %s found in packet.\n",
ctx->type->unit_name);
err = AVERROR_INVALIDDATA;
goto fail;
}
err = ctx->type->update_fragment(bsf, pkt, frag);
if (err < 0)
goto fail;
err = ff_cbs_write_packet(ctx->output, pkt, frag);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to write %s into packet.\n",
ctx->type->fragment_name);
goto fail;
}
err = 0;
fail:
ff_cbs_fragment_reset(frag);
if (err < 0)
av_packet_unref(pkt);
return err;
}
int ff_cbs_bsf_generic_init(AVBSFContext *bsf, const CBSBSFType *type)
{
CBSBSFContext *ctx = bsf->priv_data;
CodedBitstreamFragment *frag = &ctx->fragment;
int err;
ctx->type = type;
err = ff_cbs_init(&ctx->input, type->codec_id, bsf);
if (err < 0)
return err;
err = ff_cbs_init(&ctx->output, type->codec_id, bsf);
if (err < 0)
return err;
if (bsf->par_in->extradata) {
err = ff_cbs_read_extradata(ctx->input, frag, bsf->par_in);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
goto fail;
}
err = type->update_fragment(bsf, NULL, frag);
if (err < 0)
goto fail;
err = ff_cbs_write_extradata(ctx->output, bsf->par_out, frag);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
goto fail;
}
}
err = 0;
fail:
ff_cbs_fragment_reset(frag);
return err;
}
void ff_cbs_bsf_generic_close(AVBSFContext *bsf)
{
CBSBSFContext *ctx = bsf->priv_data;
ff_cbs_fragment_free(&ctx->fragment);
ff_cbs_close(&ctx->input);
ff_cbs_close(&ctx->output);
}
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