1/*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include <inttypes.h>
20
21#include "libavutil/avstring.h"
22#include "libavutil/avutil.h"
23#include "libavutil/log.h"
24
25#include "bsf.h"
26#include "bsf_internal.h"
27#include "cbs.h"
28
29
30typedef struct TraceHeadersContext {
31    CodedBitstreamContext *cbc;
32    CodedBitstreamFragment fragment;
33} TraceHeadersContext;
34
35
36static int trace_headers_init(AVBSFContext *bsf)
37{
38    TraceHeadersContext *ctx = bsf->priv_data;
39    int err;
40
41    err = ff_cbs_init(&ctx->cbc, bsf->par_in->codec_id, bsf);
42    if (err < 0)
43        return err;
44
45    ctx->cbc->trace_enable = 1;
46    ctx->cbc->trace_level  = AV_LOG_INFO;
47
48    if (bsf->par_in->extradata) {
49        CodedBitstreamFragment *frag = &ctx->fragment;
50
51        av_log(bsf, AV_LOG_INFO, "Extradata\n");
52
53        err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in);
54
55        ff_cbs_fragment_reset(frag);
56    }
57
58    return err;
59}
60
61static void trace_headers_close(AVBSFContext *bsf)
62{
63    TraceHeadersContext *ctx = bsf->priv_data;
64
65    ff_cbs_fragment_free(&ctx->fragment);
66    ff_cbs_close(&ctx->cbc);
67}
68
69static int trace_headers(AVBSFContext *bsf, AVPacket *pkt)
70{
71    TraceHeadersContext *ctx = bsf->priv_data;
72    CodedBitstreamFragment *frag = &ctx->fragment;
73    char tmp[256] = { 0 };
74    int err;
75
76    err = ff_bsf_get_packet_ref(bsf, pkt);
77    if (err < 0)
78        return err;
79
80    if (pkt->flags & AV_PKT_FLAG_KEY)
81        av_strlcat(tmp, ", key frame", sizeof(tmp));
82    if (pkt->flags & AV_PKT_FLAG_CORRUPT)
83        av_strlcat(tmp, ", corrupt", sizeof(tmp));
84
85    if (pkt->pts != AV_NOPTS_VALUE)
86        av_strlcatf(tmp, sizeof(tmp), ", pts %"PRId64, pkt->pts);
87    else
88        av_strlcat(tmp, ", no pts", sizeof(tmp));
89    if (pkt->dts != AV_NOPTS_VALUE)
90        av_strlcatf(tmp, sizeof(tmp), ", dts %"PRId64, pkt->dts);
91    else
92        av_strlcat(tmp, ", no dts", sizeof(tmp));
93    if (pkt->duration > 0)
94        av_strlcatf(tmp, sizeof(tmp), ", duration %"PRId64, pkt->duration);
95
96    av_log(bsf, AV_LOG_INFO, "Packet: %d bytes%s.\n", pkt->size, tmp);
97
98    if (av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
99        av_log(bsf, AV_LOG_INFO, "Side data:\n");
100
101        err = ff_cbs_read_packet_side_data(ctx->cbc, frag, pkt);
102        ff_cbs_fragment_reset(frag);
103
104        if (err < 0) {
105            av_packet_unref(pkt);
106            return err;
107        }
108        av_log(bsf, AV_LOG_INFO, "Payload:\n");
109    }
110
111    err = ff_cbs_read_packet(ctx->cbc, frag, pkt);
112
113    ff_cbs_fragment_reset(frag);
114
115    if (err < 0)
116        av_packet_unref(pkt);
117    return err;
118}
119
120const FFBitStreamFilter ff_trace_headers_bsf = {
121    .p.name         = "trace_headers",
122    .p.codec_ids    = ff_cbs_all_codec_ids,
123    .priv_data_size = sizeof(TraceHeadersContext),
124    .init           = &trace_headers_init,
125    .close          = &trace_headers_close,
126    .filter         = &trace_headers,
127};
128