FFmpeg
trace_headers_bsf.c
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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 <stdio.h>
20 
21 #include "libavutil/avstring.h"
22 #include "libavutil/common.h"
23 #include "libavutil/log.h"
24 
25 #include "bsf.h"
26 #include "cbs.h"
27 
28 
29 typedef struct TraceHeadersContext {
33 
34 
36 {
38  int err;
39 
40  err = ff_cbs_init(&ctx->cbc, bsf->par_in->codec_id, bsf);
41  if (err < 0)
42  return err;
43 
44  ctx->cbc->trace_enable = 1;
45  ctx->cbc->trace_level = AV_LOG_INFO;
46 
47  if (bsf->par_in->extradata) {
48  CodedBitstreamFragment *frag = &ctx->fragment;
49 
50  av_log(bsf, AV_LOG_INFO, "Extradata\n");
51 
52  err = ff_cbs_read_extradata(ctx->cbc, frag, bsf->par_in);
53 
54  ff_cbs_fragment_reset(ctx->cbc, frag);
55  }
56 
57  return err;
58 }
59 
61 {
63 
64  ff_cbs_fragment_free(ctx->cbc, &ctx->fragment);
65  ff_cbs_close(&ctx->cbc);
66 }
67 
69 {
71  CodedBitstreamFragment *frag = &ctx->fragment;
72  char tmp[256] = { 0 };
73  int err;
74 
75  err = ff_bsf_get_packet_ref(bsf, pkt);
76  if (err < 0)
77  return err;
78 
79  if (pkt->flags & AV_PKT_FLAG_KEY)
80  av_strlcat(tmp, ", key frame", sizeof(tmp));
81  if (pkt->flags & AV_PKT_FLAG_CORRUPT)
82  av_strlcat(tmp, ", corrupt", sizeof(tmp));
83 
84  if (pkt->pts != AV_NOPTS_VALUE)
85  av_strlcatf(tmp, sizeof(tmp), ", pts %"PRId64, pkt->pts);
86  else
87  av_strlcat(tmp, ", no pts", sizeof(tmp));
88  if (pkt->dts != AV_NOPTS_VALUE)
89  av_strlcatf(tmp, sizeof(tmp), ", dts %"PRId64, pkt->dts);
90  else
91  av_strlcat(tmp, ", no dts", sizeof(tmp));
92  if (pkt->duration > 0)
93  av_strlcatf(tmp, sizeof(tmp), ", duration %"PRId64, pkt->duration);
94 
95  av_log(bsf, AV_LOG_INFO, "Packet: %d bytes%s.\n", pkt->size, tmp);
96 
97  err = ff_cbs_read_packet(ctx->cbc, frag, pkt);
98 
99  ff_cbs_fragment_reset(ctx->cbc, frag);
100 
101  if (err < 0)
102  av_packet_unref(pkt);
103  return err;
104 }
105 
107  .name = "trace_headers",
108  .priv_data_size = sizeof(TraceHeadersContext),
110  .close = &trace_headers_close,
111  .filter = &trace_headers,
113 };
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int ff_cbs_init(CodedBitstreamContext **ctx_ptr, enum AVCodecID codec_id, void *log_ctx)
Create and initialise a new context for the given codec.
Definition: cbs.c:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3953
The bitstream filter state.
Definition: avcodec.h:5759
int size
Definition: avcodec.h:1478
static int trace_headers_init(AVBSFContext *bsf)
const AVBitStreamFilter ff_trace_headers_bsf
static AVPacket pkt
void * priv_data
Opaque filter-specific private data.
Definition: avcodec.h:5780
CodedBitstreamFragment fragment
CodedBitstreamContext * cbc
int trace_enable
Enable trace output during read/write operations.
Definition: cbs.h:206
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
int ff_cbs_read_packet(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, const AVPacket *pkt)
Read the data bitstream from a packet into a fragment, then split into units and decompose.
Definition: cbs.c:239
const char * name
Definition: avcodec.h:5809
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
void ff_cbs_fragment_free(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
Free the units array of a fragment in addition to what ff_cbs_fragment_reset does.
Definition: cbs.c:154
static void trace_headers_close(AVBSFContext *bsf)
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
AVFormatContext * ctx
Definition: movenc.c:48
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
Coded bitstream fragment structure, combining one or more units.
Definition: cbs.h:116
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
int trace_level
Log level to use for trace output.
Definition: cbs.h:212
void ff_cbs_fragment_reset(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag)
Free the units contained in a fragment as well as the fragment&#39;s own data buffer, but not the units a...
Definition: cbs.c:139
Context structure for coded bitstream operations.
Definition: cbs.h:168
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
void ff_cbs_close(CodedBitstreamContext **ctx_ptr)
Close a context and free all internal state.
Definition: cbs.c:113
static int trace_headers(AVBSFContext *bsf, AVPacket *pkt)
int ff_cbs_read_extradata(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, const AVCodecParameters *par)
Read the extradata bitstream found in codec parameters into a fragment, then split into units and dec...
Definition: cbs.c:221
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:93
common internal and external API header
static enum AVCodecID codec_ids[]
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1510
enum AVCodecID ff_cbs_all_codec_ids[]
Table of all supported codec IDs.
Definition: cbs.c:52
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3967
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1476
This structure stores compressed data.
Definition: avcodec.h:1454
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5787
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition: bsf.c:238
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
static uint8_t tmp[11]
Definition: aes_ctr.c:26