/* * 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 <inttypes.h> #include "libavutil/avstring.h"#include "libavutil/avutil.h"#include "libavutil/log.h" #include "bsf.h"#include "bsf_internal.h"#include "cbs.h"  typedef struct TraceHeadersContext {    CodedBitstreamContext *cbc;    CodedBitstreamFragment fragment;} TraceHeadersContext;  static int trace_headers_init(AVBSFContext *bsf){    TraceHeadersContext *ctx = bsf->priv_data;    int err;     err = ff_cbs_init(&ctx->cbc, bsf->par_in->codec_id, bsf);    if (err < 0)        return err;     ctx->cbc->trace_enable = 1;    ctx->cbc->trace_level  = AV_LOG_INFO;    ctx->cbc->trace_context = ctx->cbc;    ctx->cbc->trace_read_callback = ff_cbs_trace_read_log;     if (bsf->par_in->extradata) {        CodedBitstreamFragment *frag = &ctx->fragment;         av_log(bsf, AV_LOG_INFO, "Extradata\n");         err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in);         ff_cbs_fragment_reset(frag);    }     return err;} static void trace_headers_close(AVBSFContext *bsf){    TraceHeadersContext *ctx = bsf->priv_data;     ff_cbs_fragment_free(&ctx->fragment);    ff_cbs_close(&ctx->cbc);} static int trace_headers(AVBSFContext *bsf, AVPacket *pkt){    TraceHeadersContext *ctx = bsf->priv_data;    CodedBitstreamFragment *frag = &ctx->fragment;    char tmp[256] = { 0 };    int err;     err = ff_bsf_get_packet_ref(bsf, pkt);    if (err < 0)        return err;     if (pkt->flags & AV_PKT_FLAG_KEY)        av_strlcat(tmp, ", key frame", sizeof(tmp));    if (pkt->flags & AV_PKT_FLAG_CORRUPT)        av_strlcat(tmp, ", corrupt", sizeof(tmp));     if (pkt->pts != AV_NOPTS_VALUE)        av_strlcatf(tmp, sizeof(tmp), ", pts %"PRId64, pkt->pts);    else        av_strlcat(tmp, ", no pts", sizeof(tmp));    if (pkt->dts != AV_NOPTS_VALUE)        av_strlcatf(tmp, sizeof(tmp), ", dts %"PRId64, pkt->dts);    else        av_strlcat(tmp, ", no dts", sizeof(tmp));    if (pkt->duration > 0)        av_strlcatf(tmp, sizeof(tmp), ", duration %"PRId64, pkt->duration);     av_log(bsf, AV_LOG_INFO, "Packet: %d bytes%s.\n", pkt->size, tmp);     if (av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {        av_log(bsf, AV_LOG_INFO, "Side data:\n");         err = ff_cbs_read_packet_side_data(ctx->cbc, frag, pkt);        ff_cbs_fragment_reset(frag);         if (err < 0) {            av_packet_unref(pkt);            return err;        }        av_log(bsf, AV_LOG_INFO, "Payload:\n");    }     err = ff_cbs_read_packet(ctx->cbc, frag, pkt);     ff_cbs_fragment_reset(frag);     if (err < 0)        av_packet_unref(pkt);    return err;} const FFBitStreamFilter ff_trace_headers_bsf = {    .p.name         = "trace_headers",    .p.codec_ids    = ff_cbs_all_codec_ids,    .priv_data_size = sizeof(TraceHeadersContext),    .init           = &trace_headers_init,    .close          = &trace_headers_close,    .filter         = &trace_headers,};