FFmpeg
vp9_metadata_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 "libavutil/avstring.h"
20 #include "libavutil/common.h"
21 #include "libavutil/opt.h"
22 
23 #include "bsf.h"
24 #include "cbs.h"
25 #include "cbs_vp9.h"
26 
27 typedef struct VP9MetadataContext {
28  const AVClass *class;
29 
32 
35 
38 
39 
41 {
43  CodedBitstreamFragment *frag = &ctx->fragment;
44  int err, i;
45 
46  err = ff_bsf_get_packet_ref(bsf, pkt);
47  if (err < 0)
48  return err;
49 
50  err = ff_cbs_read_packet(ctx->cbc, frag, pkt);
51  if (err < 0) {
52  av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
53  goto fail;
54  }
55 
56  for (i = 0; i < frag->nb_units; i++) {
57  VP9RawFrame *frame = frag->units[i].content;
58  VP9RawFrameHeader *header = &frame->header;
59  int profile = (header->profile_high_bit << 1) + header->profile_low_bit;
60 
61  if (header->frame_type == VP9_KEY_FRAME ||
62  header->intra_only && profile > 0) {
63  if (ctx->color_space >= 0) {
64  if (!(profile & 1) && ctx->color_space == VP9_CS_RGB) {
65  if (!(ctx->color_warnings & 2)) {
66  av_log(bsf, AV_LOG_WARNING, "Warning: RGB "
67  "incompatible with profiles 0 and 2.\n");
68  ctx->color_warnings |= 2;
69  }
70  } else
71  header->color_space = ctx->color_space;
72  }
73 
74  if (ctx->color_range >= 0)
75  header->color_range = ctx->color_range;
76  if (header->color_space == VP9_CS_RGB) {
77  if (!(ctx->color_warnings & 1) && !header->color_range) {
78  av_log(bsf, AV_LOG_WARNING, "Warning: Color space RGB "
79  "implicitly sets color range to PC range.\n");
80  ctx->color_warnings |= 1;
81  }
82  header->color_range = 1;
83  }
84  } else if (!(ctx->color_warnings & 4) && header->intra_only && !profile &&
85  ctx->color_space >= 0 && ctx->color_space != VP9_CS_BT_601) {
86  av_log(bsf, AV_LOG_WARNING, "Warning: Intra-only frames in "
87  "profile 0 are automatically BT.601.\n");
88  ctx->color_warnings |= 4;
89  }
90  }
91 
92  err = ff_cbs_write_packet(ctx->cbc, pkt, frag);
93  if (err < 0) {
94  av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
95  goto fail;
96  }
97 
98  err = 0;
99 fail:
100  ff_cbs_fragment_reset(ctx->cbc, frag);
101 
102  if (err < 0)
103  av_packet_unref(pkt);
104 
105  return err;
106 }
107 
109 {
111 
112  return ff_cbs_init(&ctx->cbc, AV_CODEC_ID_VP9, bsf);
113 }
114 
116 {
118 
119  ff_cbs_fragment_free(ctx->cbc, &ctx->fragment);
120  ff_cbs_close(&ctx->cbc);
121 }
122 
123 #define OFFSET(x) offsetof(VP9MetadataContext, x)
124 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
125 static const AVOption vp9_metadata_options[] = {
126  { "color_space", "Set colour space (section 7.2.2)",
128  { .i64 = -1 }, -1, VP9_CS_RGB, FLAGS, "cs" },
129  { "unknown", "Unknown/unspecified", 0, AV_OPT_TYPE_CONST,
130  { .i64 = VP9_CS_UNKNOWN }, .flags = FLAGS, .unit = "cs" },
131  { "bt601", "ITU-R BT.601-7", 0, AV_OPT_TYPE_CONST,
132  { .i64 = VP9_CS_BT_601 }, .flags = FLAGS, .unit = "cs" },
133  { "bt709", "ITU-R BT.709-6", 0, AV_OPT_TYPE_CONST,
134  { .i64 = VP9_CS_BT_709 }, .flags = FLAGS, .unit = "cs" },
135  { "smpte170", "SMPTE-170", 0, AV_OPT_TYPE_CONST,
136  { .i64 = VP9_CS_SMPTE_170 }, .flags = FLAGS, .unit = "cs" },
137  { "smpte240", "SMPTE-240", 0, AV_OPT_TYPE_CONST,
138  { .i64 = VP9_CS_SMPTE_240 }, .flags = FLAGS, .unit = "cs" },
139  { "bt2020", "ITU-R BT.2020-2", 0, AV_OPT_TYPE_CONST,
140  { .i64 = VP9_CS_BT_2020 }, .flags = FLAGS, .unit = "cs" },
141  { "rgb", "sRGB / IEC 61966-2-1", 0, AV_OPT_TYPE_CONST,
142  { .i64 = VP9_CS_RGB }, .flags = FLAGS, .unit = "cs" },
143 
144  { "color_range", "Set colour range (section 7.2.2)",
146  { .i64 = -1 }, -1, 1, FLAGS, "cr" },
147  { "tv", "TV (limited) range", 0, AV_OPT_TYPE_CONST,
148  { .i64 = 0 }, .flags = FLAGS, .unit = "cr" },
149  { "pc", "PC (full) range", 0, AV_OPT_TYPE_CONST,
150  { .i64 = 1 }, .flags = FLAGS, .unit = "cr" },
151 
152  { NULL }
153 };
154 
155 static const AVClass vp9_metadata_class = {
156  .class_name = "vp9_metadata_bsf",
157  .item_name = av_default_item_name,
158  .option = vp9_metadata_options,
159  .version = LIBAVUTIL_VERSION_INT,
160 };
161 
162 static const enum AVCodecID vp9_metadata_codec_ids[] = {
164 };
165 
167  .name = "vp9_metadata",
168  .priv_data_size = sizeof(VP9MetadataContext),
169  .priv_class = &vp9_metadata_class,
171  .close = &vp9_metadata_close,
174 };
CodedBitstreamContext * cbc
uint8_t intra_only
Definition: cbs_vp9.h:104
#define NULL
Definition: coverity.c:32
int nb_units
Number of units in this fragment.
Definition: cbs.h:147
uint8_t color_space
Definition: cbs_vp9.h:97
static int vp9_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
AVOption.
Definition: opt.h:246
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int ff_cbs_write_packet(CodedBitstreamContext *ctx, AVPacket *pkt, CodedBitstreamFragment *frag)
Write the bitstream of a fragment to a packet.
Definition: cbs.c:345
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
The bitstream filter state.
Definition: avcodec.h:5774
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
color_range
static AVPacket pkt
void * priv_data
Opaque filter-specific private data.
Definition: avcodec.h:5795
static enum AVCodecID vp9_metadata_codec_ids[]
static int vp9_metadata_init(AVBSFContext *bsf)
uint8_t profile_high_bit
Definition: cbs_vp9.h:86
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
static const AVOption vp9_metadata_options[]
AVOptions.
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:5824
void * content
Pointer to the decomposed form of this unit.
Definition: cbs.h:101
static const uint8_t header[24]
Definition: sdr2.c:67
CodedBitstreamUnit * units
Pointer to an array of units of length nb_units_allocated.
Definition: cbs.h:162
#define av_log(a,...)
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
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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
#define fail()
Definition: checkasm.h:122
uint8_t profile_low_bit
Definition: cbs_vp9.h:85
static const AVClass vp9_metadata_class
AVFormatContext * ctx
Definition: movenc.c:48
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
CodedBitstreamFragment fragment
const AVBitStreamFilter ff_vp9_metadata_bsf
if(ret)
#define OFFSET(x)
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
Describe the class of an AVClass context structure.
Definition: log.h:67
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
#define FLAGS
void ff_cbs_close(CodedBitstreamContext **ctx_ptr)
Close a context and free all internal state.
Definition: cbs.c:113
static void vp9_metadata_close(AVBSFContext *bsf)
mfxU16 profile
Definition: qsvenc.c:44
uint8_t color_range
Definition: cbs_vp9.h:98
VP9RawFrameHeader header
Definition: cbs_vp9.h:165
common internal and external API header
static enum AVCodecID codec_ids[]
uint8_t frame_type
Definition: cbs_vp9.h:91
This structure stores compressed data.
Definition: avcodec.h:1457
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition: bsf.c:239