FFmpeg
av1_parser.c
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1 /*
2  * AV1 parser
3  *
4  * Copyright (C) 2018 James Almer <jamrial@gmail.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "av1_parse.h"
24 #include "cbs.h"
25 #include "cbs_av1.h"
26 #include "internal.h"
27 #include "parser.h"
28 
29 typedef struct AV1ParseContext {
34 
35 static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
38 };
39 static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
42 };
43 static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
46 };
47 
48 static const enum AVPixelFormat pix_fmts_rgb[3] = {
50 };
51 
53  AVCodecContext *avctx,
54  const uint8_t **out_data, int *out_size,
55  const uint8_t *data, int size)
56 {
58  CodedBitstreamFragment *td = &s->temporal_unit;
59  CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
62  int ret;
63 
64  *out_data = data;
65  *out_size = size;
66 
67  ctx->key_frame = -1;
68  ctx->pict_type = AV_PICTURE_TYPE_NONE;
69  ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
70 
71  s->cbc->log_ctx = avctx;
72 
73  if (avctx->extradata_size && !s->parsed_extradata) {
74  s->parsed_extradata = 1;
75 
76  ret = ff_cbs_read_extradata_from_codec(s->cbc, td, avctx);
77  if (ret < 0) {
78  av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
79  }
80 
82  }
83 
84  ret = ff_cbs_read(s->cbc, td, data, size);
85  if (ret < 0) {
86  av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
87  goto end;
88  }
89 
90  if (!av1->sequence_header) {
91  av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
92  goto end;
93  }
94 
95  seq = av1->sequence_header;
96  color = &seq->color_config;
97 
98  for (int i = 0; i < td->nb_units; i++) {
99  CodedBitstreamUnit *unit = &td->units[i];
100  AV1RawOBU *obu = unit->content;
102 
103  if (unit->type == AV1_OBU_FRAME)
104  frame = &obu->obu.frame.header;
105  else if (unit->type == AV1_OBU_FRAME_HEADER)
106  frame = &obu->obu.frame_header;
107  else
108  continue;
109 
110  if (obu->header.spatial_id > 0)
111  continue;
112 
113  if (!frame->show_frame && !frame->show_existing_frame)
114  continue;
115 
116  ctx->width = frame->frame_width_minus_1 + 1;
117  ctx->height = frame->frame_height_minus_1 + 1;
118 
119  ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame;
120 
121  switch (frame->frame_type) {
122  case AV1_FRAME_KEY:
124  ctx->pict_type = AV_PICTURE_TYPE_I;
125  break;
126  case AV1_FRAME_INTER:
127  ctx->pict_type = AV_PICTURE_TYPE_P;
128  break;
129  case AV1_FRAME_SWITCH:
130  ctx->pict_type = AV_PICTURE_TYPE_SP;
131  break;
132  }
133  ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
134  }
135 
136  switch (av1->bit_depth) {
137  case 8:
138  ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
139  : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
140  break;
141  case 10:
142  ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
143  : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
144  break;
145  case 12:
146  ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
147  : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
148  break;
149  }
150  av_assert2(ctx->format != AV_PIX_FMT_NONE);
151 
152  if (!color->subsampling_x && !color->subsampling_y &&
153  color->matrix_coefficients == AVCOL_SPC_RGB &&
154  color->color_primaries == AVCOL_PRI_BT709 &&
155  color->transfer_characteristics == AVCOL_TRC_IEC61966_2_1)
156  ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];
157 
158  avctx->profile = seq->seq_profile;
159  avctx->level = seq->seq_level_idx[0];
160 
161  avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;
162  avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;
163  avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;
164  avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
165 
166  if (avctx->framerate.num)
167  avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
168 
169 end:
171 
172  s->cbc->log_ctx = NULL;
173 
174  return size;
175 }
176 
183 };
184 
186 {
188  int ret;
189 
190  ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
191  if (ret < 0)
192  return ret;
193 
194  s->cbc->decompose_unit_types = decompose_unit_types;
195  s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
196 
197  return 0;
198 }
199 
201 {
203 
204  ff_cbs_fragment_free(&s->temporal_unit);
205  ff_cbs_close(&s->cbc);
206 }
207 
209  const uint8_t *buf, int buf_size)
210 {
211  AV1OBU obu;
212  const uint8_t *ptr = buf, *end = buf + buf_size;
213 
214  while (ptr < end) {
215  int len = ff_av1_extract_obu(&obu, ptr, buf_size, avctx);
216  if (len < 0)
217  break;
218 
219  if (obu.type == AV1_OBU_FRAME_HEADER ||
220  obu.type == AV1_OBU_FRAME) {
221  return ptr - buf;
222  }
223  ptr += len;
224  buf_size -= len;
225  }
226 
227  return 0;
228 }
229 
231  .codec_ids = { AV_CODEC_ID_AV1 },
232  .priv_data_size = sizeof(AV1ParseContext),
233  .parser_init = av1_parser_init,
234  .parser_close = av1_parser_close,
235  .parser_parse = av1_parser_parse,
237 };
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
td
#define td
Definition: regdef.h:70
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
pix_fmts_rgb
static enum AVPixelFormat pix_fmts_rgb[3]
Definition: av1_parser.c:48
AV1RawSequenceHeader::seq_level_idx
uint8_t seq_level_idx[AV1_MAX_OPERATING_POINTS]
Definition: cbs_av1.h:87
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1164
AVColorTransferCharacteristic
AVColorTransferCharacteristic
Color Transfer Characteristic.
Definition: pixfmt.h:483
AV1RawSequenceHeader
Definition: cbs_av1.h:73
color
Definition: vf_paletteuse.c:583
AV_PICTURE_STRUCTURE_UNKNOWN
@ AV_PICTURE_STRUCTURE_UNKNOWN
Definition: avcodec.h:3371
pix_fmts_8bit
static enum AVPixelFormat pix_fmts_8bit[2][2]
Definition: av1_parser.c:35
CodedBitstreamUnit::content
void * content
Pointer to the decomposed form of this unit.
Definition: cbs.h:103
out_size
int out_size
Definition: movenc.c:55
AVCodecContext::color_trc
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:1157
AVCOL_RANGE_JPEG
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:586
ff_cbs_fragment_reset
void ff_cbs_fragment_reset(CodedBitstreamFragment *frag)
Free the units contained in a fragment as well as the fragment's own data buffer, but not the units a...
Definition: cbs.c:156
internal.h
CodedBitstreamContext
Context structure for coded bitstream operations.
Definition: cbs.h:170
ff_cbs_close
void ff_cbs_close(CodedBitstreamContext **ctx_ptr)
Close a context and free all internal state.
Definition: cbs.c:126
data
const char data[16]
Definition: mxf.c:142
AV1OBU
Definition: av1_parse.h:33
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:399
AVCOL_SPC_RGB
@ AVCOL_SPC_RGB
order of coefficients is actually GBR, also IEC 61966-2-1 (sRGB)
Definition: pixfmt.h:513
CodedBitstreamUnit::type
CodedBitstreamUnitType type
Codec-specific type of this unit.
Definition: cbs.h:70
cbs.h
AVColorPrimaries
AVColorPrimaries
Chromaticity coordinates of the source primaries.
Definition: pixfmt.h:458
AV1_OBU_TEMPORAL_DELIMITER
@ AV1_OBU_TEMPORAL_DELIMITER
Definition: av1.h:31
av1_parser_init
static av_cold int av1_parser_init(AVCodecParserContext *ctx)
Definition: av1_parser.c:185
AV1RawOBU::header
AV1RawOBUHeader header
Definition: cbs_av1.h:392
ff_cbs_fragment_free
void ff_cbs_fragment_free(CodedBitstreamFragment *frag)
Free the units array of a fragment in addition to what ff_cbs_fragment_reset does.
Definition: cbs.c:170
AV1RawSequenceHeader::seq_profile
uint8_t seq_profile
Definition: cbs_av1.h:74
CodedBitstreamUnit
Coded bitstream unit structure.
Definition: cbs.h:66
AV1RawFrame::header
AV1RawFrameHeader header
Definition: cbs_av1.h:304
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:2071
AV1RawColorConfig
Definition: cbs_av1.h:41
av1_parse.h
AVCOL_TRC_IEC61966_2_1
@ AVCOL_TRC_IEC61966_2_1
IEC 61966-2-1 (sRGB or sYCC)
Definition: pixfmt.h:497
AV1_FRAME_SWITCH
@ AV1_FRAME_SWITCH
Definition: av1.h:56
AV1_OBU_FRAME_HEADER
@ AV1_OBU_FRAME_HEADER
Definition: av1.h:32
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:415
ff_cbs_read
int ff_cbs_read(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, const uint8_t *data, size_t size)
Read a bitstream from a memory region into a fragment, then split into units and decompose.
Definition: cbs.c:296
av1_parser_split
static int av1_parser_split(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: av1_parser.c:208
ff_av1_parser
AVCodecParser ff_av1_parser
Definition: av1_parser.c:230
ff_av1_extract_obu
int ff_av1_extract_obu(AV1OBU *obu, const uint8_t *buf, int length, void *logctx)
Extract an OBU from a raw bitstream.
Definition: av1_parse.c:29
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
cbs_av1.h
AV_PICTURE_STRUCTURE_FRAME
@ AV_PICTURE_STRUCTURE_FRAME
Definition: avcodec.h:3374
AVCodecContext::color_primaries
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:1150
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:638
CodedBitstreamFragment
Coded bitstream fragment structure, combining one or more units.
Definition: cbs.h:118
s
#define s(width, name)
Definition: cbs_vp9.c:257
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:380
if
if(ret)
Definition: filter_design.txt:179
AV1RawOBU::obu
union AV1RawOBU::@25 obu
AV1RawOBU
Definition: cbs_av1.h:391
NULL
#define NULL
Definition: coverity.c:32
AVCodecContext::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:1171
AVCodecParser::codec_ids
int codec_ids[5]
Definition: avcodec.h:3545
AV_CODEC_ID_AV1
@ AV_CODEC_ID_AV1
Definition: codec_id.h:279
AV1RawFrameHeader
Definition: cbs_av1.h:165
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVCOL_PRI_BT709
@ AVCOL_PRI_BT709
also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
Definition: pixfmt.h:460
av1_parser_parse
static int av1_parser_parse(AVCodecParserContext *ctx, AVCodecContext *avctx, const uint8_t **out_data, int *out_size, const uint8_t *data, int size)
Definition: av1_parser.c:52
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
AV1_OBU_TILE_GROUP
@ AV1_OBU_TILE_GROUP
Definition: av1.h:33
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:400
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
AVCodecContext::level
int level
level
Definition: avcodec.h:1984
AV_PICTURE_TYPE_SP
@ AV_PICTURE_TYPE_SP
Switching Predicted.
Definition: avutil.h:279
av1_parser_close
static void av1_parser_close(AVCodecParserContext *ctx)
Definition: av1_parser.c:200
AV1_OBU_FRAME
@ AV1_OBU_FRAME
Definition: av1.h:35
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:659
AV1ParseContext
Definition: av1_parser.c:29
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:404
AV1RawOBUHeader::spatial_id
uint8_t spatial_id
Definition: cbs_av1.h:37
size
int size
Definition: twinvq_data.h:10344
color
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:92
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:406
AV1_OBU_SEQUENCE_HEADER
@ AV1_OBU_SEQUENCE_HEADER
Definition: av1.h:30
AV_PICTURE_TYPE_NONE
@ AV_PICTURE_TYPE_NONE
Undefined.
Definition: avutil.h:273
split
static char * split(char *message, char delim)
Definition: af_channelmap.c:81
AV1_FRAME_INTRA_ONLY
@ AV1_FRAME_INTRA_ONLY
Definition: av1.h:55
AV1_FRAME_KEY
@ AV1_FRAME_KEY
Definition: av1.h:53
AV1RawOBU::frame_header
AV1RawFrameHeader frame_header
Definition: cbs_av1.h:398
ff_cbs_read_extradata_from_codec
int ff_cbs_read_extradata_from_codec(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, const AVCodecContext *avctx)
Read the extradata bitstream found in a codec context into a fragment, then split into units and deco...
Definition: cbs.c:279
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
i
int i
Definition: input.c:407
decompose_unit_types
static const CodedBitstreamUnitType decompose_unit_types[]
Definition: av1_parser.c:177
pix_fmts_12bit
static enum AVPixelFormat pix_fmts_12bit[2][2]
Definition: av1_parser.c:43
CodedBitstreamAV1Context::bit_depth
int bit_depth
Definition: cbs_av1.h:442
AV1ParseContext::cbc
CodedBitstreamContext * cbc
Definition: av1_parser.c:30
AV_PIX_FMT_GBRP12
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:416
AVColorSpace
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:512
uint8_t
uint8_t
Definition: audio_convert.c:194
AV1RawSequenceHeader::color_config
AV1RawColorConfig color_config
Definition: cbs_av1.h:128
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
parser.h
AV1ParseContext::parsed_extradata
int parsed_extradata
Definition: av1_parser.c:32
len
int len
Definition: vorbis_enc_data.h:452
AVCOL_RANGE_MPEG
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition: pixfmt.h:569
AVCodecParserContext
Definition: avcodec.h:3377
ret
ret
Definition: filter_design.txt:187
frame
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
Definition: filter_design.txt:264
ff_cbs_init
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:75
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
AVCodecContext
main external API structure.
Definition: avcodec.h:536
CodedBitstreamAV1Context::sequence_header
AV1RawSequenceHeader * sequence_header
Definition: cbs_av1.h:430
CodedBitstreamUnitType
uint32_t CodedBitstreamUnitType
The codec-specific type of a bitstream unit.
Definition: cbs.h:43
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AVCodecContext::profile
int profile
profile
Definition: avcodec.h:1858
av_mul_q
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
AV1OBU::type
int type
Definition: av1_parse.h:51
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
AV_PICTURE_TYPE_P
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:275
AV1RawOBU::frame
AV1RawFrame frame
Definition: cbs_av1.h:399
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
pix_fmts_10bit
static enum AVPixelFormat pix_fmts_10bit[2][2]
Definition: av1_parser.c:39
AVCodecParser
Definition: avcodec.h:3544
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV1_FRAME_INTER
@ AV1_FRAME_INTER
Definition: av1.h:54
AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:381
AV1ParseContext::temporal_unit
CodedBitstreamFragment temporal_unit
Definition: av1_parser.c:31
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1259
CodedBitstreamAV1Context
Definition: cbs_av1.h:427