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FFmpeg/libavcodec/cbs_h2645.c
Andreas Rheinhardt ab2173c0a5 avcodec/cbs_h2645: Avoid function pointer casts, fix UB 
The SEI message read/write functions are called
via function pointers where the SEI message-specific
context is passed as void*. But the actual function
definitions use a pointer to their proper context
in place of void*, making the calls undefined behaviour.
Clang UBSan 17 warns about this.

This commit fixes this by adding wrapper functions
(created via macros) that have the right type that
call the actual functions. This reduced the number of failing
FATE tests with UBSan from 164 to 85 here.

Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-02-25 13:42:47 +01:00

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/*
* 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 "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "bytestream.h"
#include "cbs.h"
#include "cbs_internal.h"
#include "cbs_h264.h"
#include "cbs_h265.h"
#include "cbs_h266.h"
#include "h264.h"
#include "h2645_parse.h"
#include "hevc.h"
#include "refstruct.h"
#include "vvc.h"
static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
const char *name, const int *subscripts,
uint32_t *write_to,
uint32_t range_min, uint32_t range_max)
{
uint32_t leading_bits, value;
int max_length, leading_zeroes;
CBS_TRACE_READ_START();
max_length = FFMIN(get_bits_left(gbc), 32);
leading_bits = max_length ? show_bits_long(gbc, max_length) : 0;
if (leading_bits == 0) {
if (max_length >= 32) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
"%s: more than 31 zeroes.\n", name);
return AVERROR_INVALIDDATA;
} else {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
"%s: bitstream ended.\n", name);
return AVERROR_INVALIDDATA;
}
}
leading_zeroes = max_length - 1 - av_log2(leading_bits);
skip_bits_long(gbc, leading_zeroes);
if (get_bits_left(gbc) < leading_zeroes + 1) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
"%s: bitstream ended.\n", name);
return AVERROR_INVALIDDATA;
}
value = get_bits_long(gbc, leading_zeroes + 1) - 1;
CBS_TRACE_READ_END();
if (value < range_min || value > range_max) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
"%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
name, value, range_min, range_max);
return AVERROR_INVALIDDATA;
}
*write_to = value;
return 0;
}
static int cbs_read_se_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
const char *name, const int *subscripts,
int32_t *write_to,
int32_t range_min, int32_t range_max)
{
uint32_t leading_bits, unsigned_value;
int max_length, leading_zeroes;
int32_t value;
CBS_TRACE_READ_START();
max_length = FFMIN(get_bits_left(gbc), 32);
leading_bits = max_length ? show_bits_long(gbc, max_length) : 0;
if (leading_bits == 0) {
if (max_length >= 32) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
"%s: more than 31 zeroes.\n", name);
return AVERROR_INVALIDDATA;
} else {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
"%s: bitstream ended.\n", name);
return AVERROR_INVALIDDATA;
}
}
leading_zeroes = max_length - 1 - av_log2(leading_bits);
skip_bits_long(gbc, leading_zeroes);
if (get_bits_left(gbc) < leading_zeroes + 1) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
"%s: bitstream ended.\n", name);
return AVERROR_INVALIDDATA;
}
unsigned_value = get_bits_long(gbc, leading_zeroes + 1);
if (unsigned_value & 1)
value = -(int32_t)(unsigned_value / 2);
else
value = unsigned_value / 2;
CBS_TRACE_READ_END();
if (value < range_min || value > range_max) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
"%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
name, value, range_min, range_max);
return AVERROR_INVALIDDATA;
}
*write_to = value;
return 0;
}
static int cbs_write_ue_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
const char *name, const int *subscripts,
uint32_t value,
uint32_t range_min, uint32_t range_max)
{
int len;
CBS_TRACE_WRITE_START();
if (value < range_min || value > range_max) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
"%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
name, value, range_min, range_max);
return AVERROR_INVALIDDATA;
}
av_assert0(value != UINT32_MAX);
len = av_log2(value + 1);
if (put_bits_left(pbc) < 2 * len + 1)
return AVERROR(ENOSPC);
put_bits(pbc, len, 0);
if (len + 1 < 32)
put_bits(pbc, len + 1, value + 1);
else
put_bits32(pbc, value + 1);
CBS_TRACE_WRITE_END();
return 0;
}
static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
const char *name, const int *subscripts,
int32_t value,
int32_t range_min, int32_t range_max)
{
int len;
uint32_t uvalue;
CBS_TRACE_WRITE_START();
if (value < range_min || value > range_max) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
"%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
name, value, range_min, range_max);
return AVERROR_INVALIDDATA;
}
av_assert0(value != INT32_MIN);
if (value == 0)
uvalue = 0;
else if (value > 0)
uvalue = 2 * (uint32_t)value - 1;
else
uvalue = 2 * (uint32_t)-value;
len = av_log2(uvalue + 1);
if (put_bits_left(pbc) < 2 * len + 1)
return AVERROR(ENOSPC);
put_bits(pbc, len, 0);
if (len + 1 < 32)
put_bits(pbc, len + 1, uvalue + 1);
else
put_bits32(pbc, uvalue + 1);
CBS_TRACE_WRITE_END();
return 0;
}
// payload_extension_present() - true if we are before the last 1-bit
// in the payload structure, which must be in the last byte.
static int cbs_h265_payload_extension_present(GetBitContext *gbc, uint32_t payload_size,
int cur_pos)
{
int bits_left = payload_size * 8 - cur_pos;
return (bits_left > 0 &&
(bits_left > 7 || show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1)));
}
#define HEADER(name) do { \
ff_cbs_trace_header(ctx, name); \
} while (0)
#define CHECK(call) do { \
err = (call); \
if (err < 0) \
return err; \
} while (0)
#define FUNC_NAME2(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
#define FUNC_NAME1(rw, codec, name) FUNC_NAME2(rw, codec, name)
#define FUNC_H264(name) FUNC_NAME1(READWRITE, h264, name)
#define FUNC_H265(name) FUNC_NAME1(READWRITE, h265, name)
#define FUNC_H266(name) FUNC_NAME1(READWRITE, h266, name)
#define FUNC_SEI(name) FUNC_NAME1(READWRITE, sei, name)
#define SEI_FUNC(name, args) \
static int FUNC(name) args; \
static int FUNC(name ## _internal)(CodedBitstreamContext *ctx, \
RWContext *rw, void *cur, \
SEIMessageState *state) \
{ \
return FUNC(name)(ctx, rw, cur, state); \
} \
static int FUNC(name) args
#define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
#define u(width, name, range_min, range_max) \
xu(width, name, current->name, range_min, range_max, 0, )
#define flag(name) ub(1, name)
#define ue(name, range_min, range_max) \
xue(name, current->name, range_min, range_max, 0, )
#define i(width, name, range_min, range_max) \
xi(width, name, current->name, range_min, range_max, 0, )
#define ib(width, name) \
xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), 0, )
#define se(name, range_min, range_max) \
xse(name, current->name, range_min, range_max, 0, )
#define us(width, name, range_min, range_max, subs, ...) \
xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
#define ubs(width, name, subs, ...) \
xu(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
#define flags(name, subs, ...) \
xu(1, name, current->name, 0, 1, subs, __VA_ARGS__)
#define ues(name, range_min, range_max, subs, ...) \
xue(name, current->name, range_min, range_max, subs, __VA_ARGS__)
#define is(width, name, range_min, range_max, subs, ...) \
xi(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
#define ibs(width, name, subs, ...) \
xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), subs, __VA_ARGS__)
#define ses(name, range_min, range_max, subs, ...) \
xse(name, current->name, range_min, range_max, subs, __VA_ARGS__)
#define fixed(width, name, value) do { \
av_unused uint32_t fixed_value = value; \
xu(width, name, fixed_value, value, value, 0, ); \
} while (0)
#define READ
#define READWRITE read
#define RWContext GetBitContext
#define ub(width, name) do { \
uint32_t value; \
CHECK(ff_cbs_read_simple_unsigned(ctx, rw, width, #name, \
&value)); \
current->name = value; \
} while (0)
#define xu(width, name, var, range_min, range_max, subs, ...) do { \
uint32_t value; \
CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
SUBSCRIPTS(subs, __VA_ARGS__), \
&value, range_min, range_max)); \
var = value; \
} while (0)
#define xue(name, var, range_min, range_max, subs, ...) do { \
uint32_t value; \
CHECK(cbs_read_ue_golomb(ctx, rw, #name, \
SUBSCRIPTS(subs, __VA_ARGS__), \
&value, range_min, range_max)); \
var = value; \
} while (0)
#define xi(width, name, var, range_min, range_max, subs, ...) do { \
int32_t value; \
CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
SUBSCRIPTS(subs, __VA_ARGS__), \
&value, range_min, range_max)); \
var = value; \
} while (0)
#define xse(name, var, range_min, range_max, subs, ...) do { \
int32_t value; \
CHECK(cbs_read_se_golomb(ctx, rw, #name, \
SUBSCRIPTS(subs, __VA_ARGS__), \
&value, range_min, range_max)); \
var = value; \
} while (0)
#define infer(name, value) do { \
current->name = value; \
} while (0)
static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
{
int bits_left = get_bits_left(gbc);
if (bits_left > 8)
return 1;
if (bits_left == 0)
return 0;
if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1))
return 1;
return 0;
}
#define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw))
#define bit_position(rw) (get_bits_count(rw))
#define byte_alignment(rw) (get_bits_count(rw) % 8)
/* The CBS SEI code uses the refstruct API for the allocation
* of its child buffers. */
#define allocate(name, size) do { \
name = ff_refstruct_allocz(size + \
AV_INPUT_BUFFER_PADDING_SIZE); \
if (!name) \
return AVERROR(ENOMEM); \
} while (0)
#define FUNC(name) FUNC_SEI(name)
#include "cbs_sei_syntax_template.c"
#undef FUNC
#undef allocate
/* The other code uses the refstruct API for the allocation
* of its child buffers. */
#define allocate(name, size) do { \
name ## _ref = av_buffer_allocz(size + \
AV_INPUT_BUFFER_PADDING_SIZE); \
if (!name ## _ref) \
return AVERROR(ENOMEM); \
name = name ## _ref->data; \
} while (0)
#define FUNC(name) FUNC_H264(name)
#include "cbs_h264_syntax_template.c"
#undef FUNC
#define FUNC(name) FUNC_H265(name)
#include "cbs_h265_syntax_template.c"
#undef FUNC
#define FUNC(name) FUNC_H266(name)
#include "cbs_h266_syntax_template.c"
#undef FUNC
#undef READ
#undef READWRITE
#undef RWContext
#undef ub
#undef xu
#undef xi
#undef xue
#undef xse
#undef infer
#undef more_rbsp_data
#undef bit_position
#undef byte_alignment
#undef allocate
#define WRITE
#define READWRITE write
#define RWContext PutBitContext
#define ub(width, name) do { \
uint32_t value = current->name; \
CHECK(ff_cbs_write_simple_unsigned(ctx, rw, width, #name, \
value)); \
} while (0)
#define xu(width, name, var, range_min, range_max, subs, ...) do { \
uint32_t value = var; \
CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
SUBSCRIPTS(subs, __VA_ARGS__), \
value, range_min, range_max)); \
} while (0)
#define xue(name, var, range_min, range_max, subs, ...) do { \
uint32_t value = var; \
CHECK(cbs_write_ue_golomb(ctx, rw, #name, \
SUBSCRIPTS(subs, __VA_ARGS__), \
value, range_min, range_max)); \
} while (0)
#define xi(width, name, var, range_min, range_max, subs, ...) do { \
int32_t value = var; \
CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
SUBSCRIPTS(subs, __VA_ARGS__), \
value, range_min, range_max)); \
} while (0)
#define xse(name, var, range_min, range_max, subs, ...) do { \
int32_t value = var; \
CHECK(cbs_write_se_golomb(ctx, rw, #name, \
SUBSCRIPTS(subs, __VA_ARGS__), \
value, range_min, range_max)); \
} while (0)
#define infer(name, value) do { \
if (current->name != (value)) { \
av_log(ctx->log_ctx, AV_LOG_ERROR, \
"%s does not match inferred value: " \
"%"PRId64", but should be %"PRId64".\n", \
#name, (int64_t)current->name, (int64_t)(value)); \
return AVERROR_INVALIDDATA; \
} \
} while (0)
#define more_rbsp_data(var) (var)
#define bit_position(rw) (put_bits_count(rw))
#define byte_alignment(rw) (put_bits_count(rw) % 8)
#define allocate(name, size) do { \
if (!name) { \
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \
"for writing.\n", #name); \
return AVERROR_INVALIDDATA; \
} \
} while (0)
#define FUNC(name) FUNC_SEI(name)
#include "cbs_sei_syntax_template.c"
#undef FUNC
#define FUNC(name) FUNC_H264(name)
#include "cbs_h264_syntax_template.c"
#undef FUNC
#define FUNC(name) FUNC_H265(name)
#include "cbs_h265_syntax_template.c"
#undef FUNC
#define FUNC(name) FUNC_H266(name)
#include "cbs_h266_syntax_template.c"
#undef FUNC
#undef WRITE
#undef READWRITE
#undef RWContext
#undef ub
#undef xu
#undef xi
#undef xue
#undef xse
#undef u
#undef i
#undef flag
#undef ue
#undef se
#undef infer
#undef more_rbsp_data
#undef bit_position
#undef byte_alignment
#undef allocate
static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
CodedBitstreamFragment *frag,
const H2645Packet *packet)
{
int err, i;
for (i = 0; i < packet->nb_nals; i++) {
const H2645NAL *nal = &packet->nals[i];
AVBufferRef *ref;
size_t size = nal->size;
enum AVCodecID codec_id = ctx->codec->codec_id;
if (codec_id != AV_CODEC_ID_VVC && nal->nuh_layer_id > 0)
continue;
// Remove trailing zeroes.
while (size > 0 && nal->data[size - 1] == 0)
--size;
if (size == 0) {
av_log(ctx->log_ctx, AV_LOG_VERBOSE, "Discarding empty 0 NAL unit\n");
continue;
}
ref = (nal->data == nal->raw_data) ? frag->data_ref
: packet->rbsp.rbsp_buffer_ref;
err = ff_cbs_append_unit_data(frag, nal->type,
(uint8_t*)nal->data, size, ref);
if (err < 0)
return err;
}
return 0;
}
static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
CodedBitstreamFragment *frag,
int header)
{
enum AVCodecID codec_id = ctx->codec->codec_id;
CodedBitstreamH2645Context *priv = ctx->priv_data;
GetByteContext gbc;
int err;
av_assert0(frag->data && frag->nb_units == 0);
if (frag->data_size == 0)
return 0;
if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
// AVCC header.
size_t size, start, end;
int i, count, version;
priv->mp4 = 1;
bytestream2_init(&gbc, frag->data, frag->data_size);
if (bytestream2_get_bytes_left(&gbc) < 6)
return AVERROR_INVALIDDATA;
version = bytestream2_get_byte(&gbc);
if (version != 1) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
"first byte %u.\n", version);
return AVERROR_INVALIDDATA;
}
bytestream2_skip(&gbc, 3);
priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
// SPS array.
count = bytestream2_get_byte(&gbc) & 0x1f;
start = bytestream2_tell(&gbc);
for (i = 0; i < count; i++) {
if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
return AVERROR_INVALIDDATA;
size = bytestream2_get_be16(&gbc);
if (bytestream2_get_bytes_left(&gbc) < size)
return AVERROR_INVALIDDATA;
bytestream2_skip(&gbc, size);
}
end = bytestream2_tell(&gbc);
err = ff_h2645_packet_split(&priv->read_packet,
frag->data + start, end - start,
ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
if (err < 0) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
return err;
}
err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
if (err < 0)
return err;
// PPS array.
count = bytestream2_get_byte(&gbc);
start = bytestream2_tell(&gbc);
for (i = 0; i < count; i++) {
if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
return AVERROR_INVALIDDATA;
size = bytestream2_get_be16(&gbc);
if (bytestream2_get_bytes_left(&gbc) < size)
return AVERROR_INVALIDDATA;
bytestream2_skip(&gbc, size);
}
end = bytestream2_tell(&gbc);
err = ff_h2645_packet_split(&priv->read_packet,
frag->data + start, end - start,
ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
if (err < 0) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
return err;
}
err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
if (err < 0)
return err;
if (bytestream2_get_bytes_left(&gbc) > 0) {
av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
"header.\n", bytestream2_get_bytes_left(&gbc));
}
} else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
// HVCC header.
size_t size, start, end;
int i, j, nb_arrays, nal_unit_type, nb_nals, version;
priv->mp4 = 1;
bytestream2_init(&gbc, frag->data, frag->data_size);
if (bytestream2_get_bytes_left(&gbc) < 23)
return AVERROR_INVALIDDATA;
version = bytestream2_get_byte(&gbc);
if (version != 1) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
"first byte %u.\n", version);
return AVERROR_INVALIDDATA;
}
bytestream2_skip(&gbc, 20);
priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
nb_arrays = bytestream2_get_byte(&gbc);
for (i = 0; i < nb_arrays; i++) {
nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
nb_nals = bytestream2_get_be16(&gbc);
start = bytestream2_tell(&gbc);
for (j = 0; j < nb_nals; j++) {
if (bytestream2_get_bytes_left(&gbc) < 2)
return AVERROR_INVALIDDATA;
size = bytestream2_get_be16(&gbc);
if (bytestream2_get_bytes_left(&gbc) < size)
return AVERROR_INVALIDDATA;
bytestream2_skip(&gbc, size);
}
end = bytestream2_tell(&gbc);
err = ff_h2645_packet_split(&priv->read_packet,
frag->data + start, end - start,
ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
if (err < 0) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
"HVCC array %d (%d NAL units of type %d).\n",
i, nb_nals, nal_unit_type);
return err;
}
err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
if (err < 0)
return err;
}
} else if(header && frag->data[0] && codec_id == AV_CODEC_ID_VVC) {
// VVCC header.
int ptl_present_flag, num_arrays;
int b, i, j;
priv->mp4 = 1;
bytestream2_init(&gbc, frag->data, frag->data_size);
b = bytestream2_get_byte(&gbc);
priv->nal_length_size = ((b >> 1) & 3) + 1;
ptl_present_flag = b & 1;
if(ptl_present_flag) {
int num_sublayers, num_bytes_constraint_info, num_sub_profiles;
num_sublayers = (bytestream2_get_be16u(&gbc) >> 4) & 7;
bytestream2_skip(&gbc, 1);
// begin VvcPTLRecord(num_sublayers);
num_bytes_constraint_info = bytestream2_get_byte(&gbc) & 0x3f;
bytestream2_skip(&gbc, 2 + num_bytes_constraint_info);
if(num_sublayers > 1) {
int count_present_flags = 0;
b = bytestream2_get_byte(&gbc);
for(i = num_sublayers - 2; i >= 0; i--) {
if((b >> (7 - (num_sublayers - 2 - i))) & 0x01)
count_present_flags++;
}
bytestream2_skip(&gbc, count_present_flags);
}
num_sub_profiles = bytestream2_get_byte(&gbc);
bytestream2_skip(&gbc, num_sub_profiles * 4);
// end VvcPTLRecord(num_sublayers);
bytestream2_skip(&gbc, 3 * 2);
}
num_arrays = bytestream2_get_byte(&gbc);
for(j = 0; j < num_arrays; j++) {
size_t start, end, size;
int nal_unit_type = bytestream2_get_byte(&gbc) & 0x1f;
unsigned int num_nalus = 1;
if(nal_unit_type != VVC_DCI_NUT && nal_unit_type != VVC_OPI_NUT)
num_nalus = bytestream2_get_be16(&gbc);
start = bytestream2_tell(&gbc);
for(i = 0; i < num_nalus; i++) {
size = bytestream2_get_be16(&gbc);
bytestream2_skip(&gbc, size);
}
end = bytestream2_tell(&gbc);
err = ff_h2645_packet_split(&priv->read_packet,
frag->data + start, end - start,
ctx->log_ctx, 1, 2, AV_CODEC_ID_VVC, 1, 1);
if (err < 0) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
"VVCC array %d (%d NAL units of type %d).\n",
i, num_nalus, nal_unit_type);
return err;
}
err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
if (err < 0)
return err;
}
} else {
// Annex B, or later MP4 with already-known parameters.
err = ff_h2645_packet_split(&priv->read_packet,
frag->data, frag->data_size,
ctx->log_ctx,
priv->mp4, priv->nal_length_size,
codec_id, 1, 1);
if (err < 0)
return err;
err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
if (err < 0)
return err;
}
return 0;
}
#define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
CodedBitstreamUnit *unit) \
{ \
CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
unsigned int id = ps_var->id_element; \
int err = ff_cbs_make_unit_refcounted(ctx, unit); \
if (err < 0) \
return err; \
if (priv->ps_var[id] == priv->active_ ## ps_var) \
priv->active_ ## ps_var = NULL ; \
av_assert0(unit->content_ref); \
ff_refstruct_replace(&priv->ps_var[id], unit->content_ref); \
return 0; \
}
cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
#define cbs_h266_replace_ps(h26n, ps_name, ps_var, id_element) \
static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
CodedBitstreamUnit *unit) \
{ \
CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
unsigned int id = ps_var->id_element; \
int err = ff_cbs_make_unit_refcounted(ctx, unit); \
if (err < 0) \
return err; \
av_assert0(unit->content_ref); \
ff_refstruct_replace(&priv->ps_var[id], unit->content_ref); \
return 0; \
}
cbs_h266_replace_ps(6, VPS, vps, vps_video_parameter_set_id)
cbs_h266_replace_ps(6, SPS, sps, sps_seq_parameter_set_id)
cbs_h266_replace_ps(6, PPS, pps, pps_pic_parameter_set_id)
static int cbs_h266_replace_ph(CodedBitstreamContext *ctx,
CodedBitstreamUnit *unit,
H266RawPictureHeader *ph)
{
CodedBitstreamH266Context *h266 = ctx->priv_data;
int err;
err = ff_cbs_make_unit_refcounted(ctx, unit);
if (err < 0)
return err;
av_assert0(unit->content_ref);
ff_refstruct_replace(&h266->ph_ref, unit->content_ref);
h266->ph = ph;
return 0;
}
static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
CodedBitstreamUnit *unit)
{
GetBitContext gbc;
int err;
err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
if (err < 0)
return err;
err = ff_cbs_alloc_unit_content(ctx, unit);
if (err < 0)
return err;
switch (unit->type) {
case H264_NAL_SPS:
{
H264RawSPS *sps = unit->content;
err = cbs_h264_read_sps(ctx, &gbc, sps);
if (err < 0)
return err;
err = cbs_h264_replace_sps(ctx, unit);
if (err < 0)
return err;
}
break;
case H264_NAL_SPS_EXT:
{
err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
case H264_NAL_PPS:
{
H264RawPPS *pps = unit->content;
err = cbs_h264_read_pps(ctx, &gbc, pps);
if (err < 0)
return err;
err = cbs_h264_replace_pps(ctx, unit);
if (err < 0)
return err;
}
break;
case H264_NAL_SLICE:
case H264_NAL_IDR_SLICE:
case H264_NAL_AUXILIARY_SLICE:
{
H264RawSlice *slice = unit->content;
int pos, len;
err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
if (err < 0)
return err;
if (!cbs_h2645_read_more_rbsp_data(&gbc))
return AVERROR_INVALIDDATA;
pos = get_bits_count(&gbc);
len = unit->data_size;
slice->data_size = len - pos / 8;
slice->data_ref = av_buffer_ref(unit->data_ref);
if (!slice->data_ref)
return AVERROR(ENOMEM);
slice->data = unit->data + pos / 8;
slice->data_bit_start = pos % 8;
}
break;
case H264_NAL_AUD:
{
err = cbs_h264_read_aud(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
case H264_NAL_SEI:
{
err = cbs_h264_read_sei(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
case H264_NAL_FILLER_DATA:
{
err = cbs_h264_read_filler(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
case H264_NAL_END_SEQUENCE:
case H264_NAL_END_STREAM:
{
err = (unit->type == H264_NAL_END_SEQUENCE ?
cbs_h264_read_end_of_sequence :
cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
default:
return AVERROR(ENOSYS);
}
return 0;
}
static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
CodedBitstreamUnit *unit)
{
GetBitContext gbc;
int err;
err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
if (err < 0)
return err;
err = ff_cbs_alloc_unit_content(ctx, unit);
if (err < 0)
return err;
switch (unit->type) {
case HEVC_NAL_VPS:
{
H265RawVPS *vps = unit->content;
err = cbs_h265_read_vps(ctx, &gbc, vps);
if (err < 0)
return err;
err = cbs_h265_replace_vps(ctx, unit);
if (err < 0)
return err;
}
break;
case HEVC_NAL_SPS:
{
H265RawSPS *sps = unit->content;
err = cbs_h265_read_sps(ctx, &gbc, sps);
if (err < 0)
return err;
err = cbs_h265_replace_sps(ctx, unit);
if (err < 0)
return err;
}
break;
case HEVC_NAL_PPS:
{
H265RawPPS *pps = unit->content;
err = cbs_h265_read_pps(ctx, &gbc, pps);
if (err < 0)
return err;
err = cbs_h265_replace_pps(ctx, unit);
if (err < 0)
return err;
}
break;
case HEVC_NAL_TRAIL_N:
case HEVC_NAL_TRAIL_R:
case HEVC_NAL_TSA_N:
case HEVC_NAL_TSA_R:
case HEVC_NAL_STSA_N:
case HEVC_NAL_STSA_R:
case HEVC_NAL_RADL_N:
case HEVC_NAL_RADL_R:
case HEVC_NAL_RASL_N:
case HEVC_NAL_RASL_R:
case HEVC_NAL_BLA_W_LP:
case HEVC_NAL_BLA_W_RADL:
case HEVC_NAL_BLA_N_LP:
case HEVC_NAL_IDR_W_RADL:
case HEVC_NAL_IDR_N_LP:
case HEVC_NAL_CRA_NUT:
{
H265RawSlice *slice = unit->content;
int pos, len;
err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
if (err < 0)
return err;
if (!cbs_h2645_read_more_rbsp_data(&gbc))
return AVERROR_INVALIDDATA;
pos = get_bits_count(&gbc);
len = unit->data_size;
slice->data_size = len - pos / 8;
slice->data_ref = av_buffer_ref(unit->data_ref);
if (!slice->data_ref)
return AVERROR(ENOMEM);
slice->data = unit->data + pos / 8;
slice->data_bit_start = pos % 8;
}
break;
case HEVC_NAL_AUD:
{
err = cbs_h265_read_aud(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
case HEVC_NAL_SEI_PREFIX:
case HEVC_NAL_SEI_SUFFIX:
{
err = cbs_h265_read_sei(ctx, &gbc, unit->content,
unit->type == HEVC_NAL_SEI_PREFIX);
if (err < 0)
return err;
}
break;
default:
return AVERROR(ENOSYS);
}
return 0;
}
static int cbs_h266_read_nal_unit(CodedBitstreamContext *ctx,
CodedBitstreamUnit *unit)
{
GetBitContext gbc;
int err;
err = init_get_bits8(&gbc, unit->data, unit->data_size);
if (err < 0)
return err;
err = ff_cbs_alloc_unit_content(ctx, unit);
if (err < 0)
return err;
switch (unit->type) {
case VVC_DCI_NUT:
{
err = cbs_h266_read_dci(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
case VVC_OPI_NUT:
{
err = cbs_h266_read_opi(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
case VVC_VPS_NUT:
{
H266RawVPS *vps = unit->content;
err = cbs_h266_read_vps(ctx, &gbc, vps);
if (err < 0)
return err;
err = cbs_h266_replace_vps(ctx, unit);
if (err < 0)
return err;
}
break;
case VVC_SPS_NUT:
{
H266RawSPS *sps = unit->content;
err = cbs_h266_read_sps(ctx, &gbc, sps);
if (err < 0)
return err;
err = cbs_h266_replace_sps(ctx, unit);
if (err < 0)
return err;
}
break;
case VVC_PPS_NUT:
{
H266RawPPS *pps = unit->content;
err = cbs_h266_read_pps(ctx, &gbc, pps);
if (err < 0)
return err;
err = cbs_h266_replace_pps(ctx, unit);
if (err < 0)
return err;
}
break;
case VVC_PREFIX_APS_NUT:
case VVC_SUFFIX_APS_NUT:
{
err = cbs_h266_read_aps(ctx, &gbc, unit->content,
unit->type == VVC_PREFIX_APS_NUT);
if (err < 0)
return err;
}
break;
case VVC_PH_NUT:
{
H266RawPH *ph = unit->content;
err = cbs_h266_read_ph(ctx, &gbc, ph);
if (err < 0)
return err;
err = cbs_h266_replace_ph(ctx, unit, &ph->ph_picture_header);
if (err < 0)
return err;
}
break;
case VVC_TRAIL_NUT:
case VVC_STSA_NUT:
case VVC_RADL_NUT:
case VVC_RASL_NUT:
case VVC_IDR_W_RADL:
case VVC_IDR_N_LP:
case VVC_CRA_NUT:
case VVC_GDR_NUT:
{
H266RawSlice *slice = unit->content;
int pos, len;
err = cbs_h266_read_slice_header(ctx, &gbc, &slice->header);
if (err < 0)
return err;
if (!cbs_h2645_read_more_rbsp_data(&gbc))
return AVERROR_INVALIDDATA;
pos = get_bits_count(&gbc);
len = unit->data_size;
if (slice->header.sh_picture_header_in_slice_header_flag) {
err = cbs_h266_replace_ph(ctx, unit, &slice->header.sh_picture_header);
if (err < 0)
return err;
}
slice->header_size = pos / 8;
slice->data_size = len - pos / 8;
slice->data_ref = av_buffer_ref(unit->data_ref);
if (!slice->data_ref)
return AVERROR(ENOMEM);
slice->data = unit->data + pos / 8;
slice->data_bit_start = pos % 8;
}
break;
case VVC_AUD_NUT:
{
err = cbs_h266_read_aud(ctx, &gbc, unit->content);
if (err < 0)
return err;
}
break;
case VVC_PREFIX_SEI_NUT:
case VVC_SUFFIX_SEI_NUT:
{
err = cbs_h266_read_sei(ctx, &gbc, unit->content,
unit->type == VVC_PREFIX_SEI_NUT);
if (err < 0)
return err;
}
break;
default:
return AVERROR(ENOSYS);
}
return 0;
}
static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
PutBitContext *pbc, const uint8_t *data,
size_t data_size, int data_bit_start)
{
size_t rest = data_size - (data_bit_start + 7) / 8;
const uint8_t *pos = data + data_bit_start / 8;
av_assert0(data_bit_start >= 0 &&
data_size > data_bit_start / 8);
if (data_size * 8 + 8 > put_bits_left(pbc))
return AVERROR(ENOSPC);
if (!rest)
goto rbsp_stop_one_bit;
// First copy the remaining bits of the first byte
// The above check ensures that we do not accidentally
// copy beyond the rbsp_stop_one_bit.
if (data_bit_start % 8)
put_bits(pbc, 8 - data_bit_start % 8,
*pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
if (put_bits_count(pbc) % 8 == 0) {
// If the writer is aligned at this point,
// memcpy can be used to improve performance.
// This happens normally for CABAC.
flush_put_bits(pbc);
memcpy(put_bits_ptr(pbc), pos, rest);
skip_put_bytes(pbc, rest);
} else {
// If not, we have to copy manually.
// rbsp_stop_one_bit forces us to special-case
// the last byte.
uint8_t temp;
int i;
for (; rest > 4; rest -= 4, pos += 4)
put_bits32(pbc, AV_RB32(pos));
for (; rest > 1; rest--, pos++)
put_bits(pbc, 8, *pos);
rbsp_stop_one_bit:
temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
av_assert0(temp);
i = ff_ctz(*pos);
temp = temp >> i;
i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
put_bits(pbc, i, temp);
if (put_bits_count(pbc) % 8)
put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
}
return 0;
}
static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
CodedBitstreamUnit *unit,
PutBitContext *pbc)
{
int err;
switch (unit->type) {
case H264_NAL_SPS:
{
H264RawSPS *sps = unit->content;
err = cbs_h264_write_sps(ctx, pbc, sps);
if (err < 0)
return err;
err = cbs_h264_replace_sps(ctx, unit);
if (err < 0)
return err;
}
break;
case H264_NAL_SPS_EXT:
{
H264RawSPSExtension *sps_ext = unit->content;
err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
if (err < 0)
return err;
}
break;
case H264_NAL_PPS:
{
H264RawPPS *pps = unit->content;
err = cbs_h264_write_pps(ctx, pbc, pps);
if (err < 0)
return err;
err = cbs_h264_replace_pps(ctx, unit);
if (err < 0)
return err;
}
break;
case H264_NAL_SLICE:
case H264_NAL_IDR_SLICE:
case H264_NAL_AUXILIARY_SLICE:
{
H264RawSlice *slice = unit->content;
err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
if (err < 0)
return err;
if (slice->data) {
err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
slice->data_size,
slice->data_bit_start);
if (err < 0)
return err;
} else {
// No slice data - that was just the header.
// (Bitstream may be unaligned!)
}
}
break;
case H264_NAL_AUD:
{
err = cbs_h264_write_aud(ctx, pbc, unit->content);
if (err < 0)
return err;
}
break;
case H264_NAL_SEI:
{
err = cbs_h264_write_sei(ctx, pbc, unit->content);
if (err < 0)
return err;
}
break;
case H264_NAL_FILLER_DATA:
{
err = cbs_h264_write_filler(ctx, pbc, unit->content);
if (err < 0)
return err;
}
break;
case H264_NAL_END_SEQUENCE:
{
err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
if (err < 0)
return err;
}
break;
case H264_NAL_END_STREAM:
{
err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
if (err < 0)
return err;
}
break;
default:
av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
"NAL unit type %"PRIu32".\n", unit->type);
return AVERROR_PATCHWELCOME;
}
return 0;
}
static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
CodedBitstreamUnit *unit,
PutBitContext *pbc)
{
int err;
switch (unit->type) {
case HEVC_NAL_VPS:
{
H265RawVPS *vps = unit->content;
err = cbs_h265_write_vps(ctx, pbc, vps);
if (err < 0)
return err;
err = cbs_h265_replace_vps(ctx, unit);
if (err < 0)
return err;
}
break;
case HEVC_NAL_SPS:
{
H265RawSPS *sps = unit->content;
err = cbs_h265_write_sps(ctx, pbc, sps);
if (err < 0)
return err;
err = cbs_h265_replace_sps(ctx, unit);
if (err < 0)
return err;
}
break;
case HEVC_NAL_PPS:
{
H265RawPPS *pps = unit->content;
err = cbs_h265_write_pps(ctx, pbc, pps);
if (err < 0)
return err;
err = cbs_h265_replace_pps(ctx, unit);
if (err < 0)
return err;
}
break;
case HEVC_NAL_TRAIL_N:
case HEVC_NAL_TRAIL_R:
case HEVC_NAL_TSA_N:
case HEVC_NAL_TSA_R:
case HEVC_NAL_STSA_N:
case HEVC_NAL_STSA_R:
case HEVC_NAL_RADL_N:
case HEVC_NAL_RADL_R:
case HEVC_NAL_RASL_N:
case HEVC_NAL_RASL_R:
case HEVC_NAL_BLA_W_LP:
case HEVC_NAL_BLA_W_RADL:
case HEVC_NAL_BLA_N_LP:
case HEVC_NAL_IDR_W_RADL:
case HEVC_NAL_IDR_N_LP:
case HEVC_NAL_CRA_NUT:
{
H265RawSlice *slice = unit->content;
err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
if (err < 0)
return err;
if (slice->data) {
err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
slice->data_size,
slice->data_bit_start);
if (err < 0)
return err;
} else {
// No slice data - that was just the header.
}
}
break;
case HEVC_NAL_AUD:
{
err = cbs_h265_write_aud(ctx, pbc, unit->content);
if (err < 0)
return err;
}
break;
case HEVC_NAL_SEI_PREFIX:
case HEVC_NAL_SEI_SUFFIX:
{
err = cbs_h265_write_sei(ctx, pbc, unit->content,
unit->type == HEVC_NAL_SEI_PREFIX);
if (err < 0)
return err;
}
break;
default:
av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
"NAL unit type %"PRIu32".\n", unit->type);
return AVERROR_PATCHWELCOME;
}
return 0;
}
static int cbs_h264_discarded_nal_unit(CodedBitstreamContext *ctx,
const CodedBitstreamUnit *unit,
enum AVDiscard skip)
{
H264RawNALUnitHeader *header;
H264RawSliceHeader *slice;
int slice_type_i, slice_type_b, slice_type_si;
if (skip <= AVDISCARD_DEFAULT)
return 0;
// keep non-VCL
if (unit->type != H264_NAL_SLICE &&
unit->type != H264_NAL_IDR_SLICE &&
unit->type != H264_NAL_AUXILIARY_SLICE)
return 0;
if (skip >= AVDISCARD_ALL)
return 1;
if (skip >= AVDISCARD_NONKEY && unit->type != H264_NAL_IDR_SLICE)
return 1;
header = (H264RawNALUnitHeader *)unit->content;
if (!header) {
av_log(ctx->log_ctx, AV_LOG_WARNING,
"h264 nal unit header is null, missing decompose?\n");
return 0;
}
if (skip >= AVDISCARD_NONREF && !header->nal_ref_idc)
return 1;
slice = (H264RawSliceHeader *)unit->content;
if (!slice) {
av_log(ctx->log_ctx, AV_LOG_WARNING,
"h264 slice header is null, missing decompose?\n");
return 0;
}
slice_type_i = slice->slice_type % 5 == 2;
slice_type_b = slice->slice_type % 5 == 1;
slice_type_si = slice->slice_type % 5 == 4;
if (skip >= AVDISCARD_BIDIR && slice_type_b)
return 1;
if (skip >= AVDISCARD_NONINTRA && !slice_type_i && !slice_type_si)
return 1;
return 0;
}
static int cbs_h265_discarded_nal_unit(CodedBitstreamContext *ctx,
const CodedBitstreamUnit *unit,
enum AVDiscard skip)
{
H265RawSliceHeader *slice;
if (skip <= AVDISCARD_DEFAULT)
return 0;
switch (unit->type) {
case HEVC_NAL_BLA_W_LP:
case HEVC_NAL_BLA_W_RADL:
case HEVC_NAL_BLA_N_LP:
case HEVC_NAL_IDR_W_RADL:
case HEVC_NAL_IDR_N_LP:
case HEVC_NAL_CRA_NUT:
// IRAP slice
if (skip < AVDISCARD_ALL)
return 0;
break;
case HEVC_NAL_TRAIL_R:
case HEVC_NAL_TRAIL_N:
case HEVC_NAL_TSA_N:
case HEVC_NAL_TSA_R:
case HEVC_NAL_STSA_N:
case HEVC_NAL_STSA_R:
case HEVC_NAL_RADL_N:
case HEVC_NAL_RADL_R:
case HEVC_NAL_RASL_N:
case HEVC_NAL_RASL_R:
// Slice
break;
default:
// Don't discard non-slice nal.
return 0;
}
if (skip >= AVDISCARD_NONKEY)
return 1;
slice = (H265RawSliceHeader *)unit->content;
if (!slice) {
av_log(ctx->log_ctx, AV_LOG_WARNING,
"h265 slice header is null, missing decompose?\n");
return 0;
}
if (skip >= AVDISCARD_NONINTRA && slice->slice_type != HEVC_SLICE_I)
return 1;
if (skip >= AVDISCARD_BIDIR && slice->slice_type == HEVC_SLICE_B)
return 1;
if (skip >= AVDISCARD_NONREF) {
switch (unit->type) {
case HEVC_NAL_TRAIL_N:
case HEVC_NAL_TSA_N:
case HEVC_NAL_STSA_N:
case HEVC_NAL_RADL_N:
case HEVC_NAL_RASL_N:
case HEVC_NAL_VCL_N10:
case HEVC_NAL_VCL_N12:
case HEVC_NAL_VCL_N14:
// non-ref
return 1;
default:
break;
}
}
return 0;
}
static int cbs_h266_write_nal_unit(CodedBitstreamContext *ctx,
CodedBitstreamUnit *unit,
PutBitContext *pbc)
{
int err;
switch (unit->type) {
case VVC_DCI_NUT:
{
H266RawDCI *dci = unit->content;
err = cbs_h266_write_dci(ctx, pbc, dci);
if (err < 0)
return err;
}
break;
case VVC_OPI_NUT:
{
H266RawOPI *opi = unit->content;
err = cbs_h266_write_opi(ctx, pbc, opi);
if (err < 0)
return err;
}
break;
case VVC_VPS_NUT:
{
H266RawVPS *vps = unit->content;
err = cbs_h266_write_vps(ctx, pbc, vps);
if (err < 0)
return err;
err = cbs_h266_replace_vps(ctx, unit);
if (err < 0)
return err;
}
break;
case VVC_SPS_NUT:
{
H266RawSPS *sps = unit->content;
err = cbs_h266_write_sps(ctx, pbc, sps);
if (err < 0)
return err;
err = cbs_h266_replace_sps(ctx, unit);
if (err < 0)
return err;
}
break;
case VVC_PPS_NUT:
{
H266RawPPS *pps = unit->content;
err = cbs_h266_write_pps(ctx, pbc, pps);
if (err < 0)
return err;
err = cbs_h266_replace_pps(ctx, unit);
if (err < 0)
return err;
}
break;
case VVC_PREFIX_APS_NUT:
case VVC_SUFFIX_APS_NUT:
{
err = cbs_h266_write_aps(ctx, pbc, unit->content,
unit->type == VVC_PREFIX_APS_NUT);
if (err < 0)
return err;
}
break;
case VVC_PH_NUT:
{
H266RawPH *ph = unit->content;
err = cbs_h266_write_ph(ctx, pbc, ph);
if (err < 0)
return err;
err = cbs_h266_replace_ph(ctx, unit, &ph->ph_picture_header);
if (err < 0)
return err;
}
break;
case VVC_TRAIL_NUT:
case VVC_STSA_NUT:
case VVC_RADL_NUT:
case VVC_RASL_NUT:
case VVC_IDR_W_RADL:
case VVC_IDR_N_LP:
case VVC_CRA_NUT:
case VVC_GDR_NUT:
{
H266RawSlice *slice = unit->content;
err = cbs_h266_write_slice_header(ctx, pbc, &slice->header);
if (err < 0)
return err;
if (slice->header.sh_picture_header_in_slice_header_flag) {
err = cbs_h266_replace_ph(ctx, unit, &slice->header.sh_picture_header);
if (err < 0)
return err;
}
if (slice->data) {
err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
slice->data_size,
slice->data_bit_start);
if (err < 0)
return err;
} else {
// No slice data - that was just the header.
}
}
break;
case VVC_AUD_NUT:
{
err = cbs_h266_write_aud(ctx, pbc, unit->content);
if (err < 0)
return err;
}
break;
case VVC_PREFIX_SEI_NUT:
case VVC_SUFFIX_SEI_NUT:
{
err = cbs_h266_write_sei(ctx, pbc, unit->content,
unit->type == VVC_PREFIX_SEI_NUT);
if (err < 0)
return err;
}
break;
default:
av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
"NAL unit type %"PRIu32".\n", unit->type);
return AVERROR_PATCHWELCOME;
}
return 0;
}
static int cbs_h2645_unit_requires_zero_byte(enum AVCodecID codec_id,
CodedBitstreamUnitType type,
int nal_unit_index)
{
// Section B.1.2 in H.264, section B.2.2 in H.265, H.266.
if (nal_unit_index == 0) {
// Assume that this is the first NAL unit in an access unit.
return 1;
}
if (codec_id == AV_CODEC_ID_H264)
return type == H264_NAL_SPS || type == H264_NAL_PPS;
if (codec_id == AV_CODEC_ID_HEVC)
return type == HEVC_NAL_VPS || type == HEVC_NAL_SPS || type == HEVC_NAL_PPS;
if (codec_id == AV_CODEC_ID_VVC)
return type >= VVC_OPI_NUT && type <= VVC_SUFFIX_APS_NUT;
return 0;
}
static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
CodedBitstreamFragment *frag)
{
uint8_t *data;
size_t max_size, dp, sp;
int err, i, zero_run;
for (i = 0; i < frag->nb_units; i++) {
// Data should already all have been written when we get here.
av_assert0(frag->units[i].data);
}
max_size = 0;
for (i = 0; i < frag->nb_units; i++) {
// Start code + content with worst-case emulation prevention.
max_size += 4 + frag->units[i].data_size * 3 / 2;
}
data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!data)
return AVERROR(ENOMEM);
dp = 0;
for (i = 0; i < frag->nb_units; i++) {
CodedBitstreamUnit *unit = &frag->units[i];
if (unit->data_bit_padding > 0) {
if (i < frag->nb_units - 1)
av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
"unaligned padding on non-final NAL unit.\n");
else
frag->data_bit_padding = unit->data_bit_padding;
}
if (cbs_h2645_unit_requires_zero_byte(ctx->codec->codec_id, unit->type, i)) {
// zero_byte
data[dp++] = 0;
}
// start_code_prefix_one_3bytes
data[dp++] = 0;
data[dp++] = 0;
data[dp++] = 1;
zero_run = 0;
for (sp = 0; sp < unit->data_size; sp++) {
if (zero_run < 2) {
if (unit->data[sp] == 0)
++zero_run;
else
zero_run = 0;
} else {
if ((unit->data[sp] & ~3) == 0) {
// emulation_prevention_three_byte
data[dp++] = 3;
}
zero_run = unit->data[sp] == 0;
}
data[dp++] = unit->data[sp];
}
}
av_assert0(dp <= max_size);
err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
if (err)
return err;
memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
NULL, NULL, 0);
if (!frag->data_ref) {
av_freep(&data);
return AVERROR(ENOMEM);
}
frag->data = data;
frag->data_size = dp;
return 0;
}
static void cbs_h264_flush(CodedBitstreamContext *ctx)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
for (int i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
ff_refstruct_unref(&h264->sps[i]);
for (int i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
ff_refstruct_unref(&h264->pps[i]);
h264->active_sps = NULL;
h264->active_pps = NULL;
h264->last_slice_nal_unit_type = 0;
}
static void cbs_h264_close(CodedBitstreamContext *ctx)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
int i;
ff_h2645_packet_uninit(&h264->common.read_packet);
for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
ff_refstruct_unref(&h264->sps[i]);
for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
ff_refstruct_unref(&h264->pps[i]);
}
static void cbs_h265_flush(CodedBitstreamContext *ctx)
{
CodedBitstreamH265Context *h265 = ctx->priv_data;
for (int i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
ff_refstruct_unref(&h265->vps[i]);
for (int i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
ff_refstruct_unref(&h265->sps[i]);
for (int i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
ff_refstruct_unref(&h265->pps[i]);
h265->active_vps = NULL;
h265->active_sps = NULL;
h265->active_pps = NULL;
}
static void cbs_h265_close(CodedBitstreamContext *ctx)
{
CodedBitstreamH265Context *h265 = ctx->priv_data;
int i;
ff_h2645_packet_uninit(&h265->common.read_packet);
for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
ff_refstruct_unref(&h265->vps[i]);
for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
ff_refstruct_unref(&h265->sps[i]);
for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
ff_refstruct_unref(&h265->pps[i]);
}
static void cbs_h266_flush(CodedBitstreamContext *ctx)
{
CodedBitstreamH266Context *h266 = ctx->priv_data;
for (int i = 0; i < FF_ARRAY_ELEMS(h266->vps); i++)
ff_refstruct_unref(&h266->vps[i]);
for (int i = 0; i < FF_ARRAY_ELEMS(h266->sps); i++)
ff_refstruct_unref(&h266->sps[i]);
for (int i = 0; i < FF_ARRAY_ELEMS(h266->pps); i++)
ff_refstruct_unref(&h266->pps[i]);
ff_refstruct_unref(&h266->ph_ref);
}
static void cbs_h266_close(CodedBitstreamContext *ctx)
{
CodedBitstreamH266Context *h266 = ctx->priv_data;
cbs_h266_flush(ctx);
ff_h2645_packet_uninit(&h266->common.read_packet);
}
static void cbs_h264_free_sei(FFRefStructOpaque unused, void *content)
{
H264RawSEI *sei = content;
ff_cbs_sei_free_message_list(&sei->message_list);
}
static const CodedBitstreamUnitTypeDescriptor cbs_h264_unit_types[] = {
CBS_UNIT_TYPE_POD(H264_NAL_SPS, H264RawSPS),
CBS_UNIT_TYPE_POD(H264_NAL_SPS_EXT, H264RawSPSExtension),
CBS_UNIT_TYPE_INTERNAL_REF(H264_NAL_PPS, H264RawPPS, slice_group_id),
CBS_UNIT_TYPES_INTERNAL_REF((H264_NAL_IDR_SLICE,
H264_NAL_SLICE,
H264_NAL_AUXILIARY_SLICE), H264RawSlice, data),
CBS_UNIT_TYPE_POD(H264_NAL_AUD, H264RawAUD),
CBS_UNIT_TYPE_POD(H264_NAL_FILLER_DATA, H264RawFiller),
CBS_UNIT_TYPE_POD(H264_NAL_END_SEQUENCE, H264RawNALUnitHeader),
CBS_UNIT_TYPE_POD(H264_NAL_END_STREAM, H264RawNALUnitHeader),
CBS_UNIT_TYPE_COMPLEX(H264_NAL_SEI, H264RawSEI, &cbs_h264_free_sei),
CBS_UNIT_TYPE_END_OF_LIST
};
static void cbs_h265_free_sei(FFRefStructOpaque unused, void *content)
{
H265RawSEI *sei = content;
ff_cbs_sei_free_message_list(&sei->message_list);
}
static const CodedBitstreamUnitTypeDescriptor cbs_h265_unit_types[] = {
CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_VPS, H265RawVPS, extension_data.data),
CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_SPS, H265RawSPS, extension_data.data),
CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_PPS, H265RawPPS, extension_data.data),
CBS_UNIT_TYPE_POD(HEVC_NAL_AUD, H265RawAUD),
// Slices of non-IRAP pictures.
CBS_UNIT_RANGE_INTERNAL_REF(HEVC_NAL_TRAIL_N, HEVC_NAL_RASL_R,
H265RawSlice, data),
// Slices of IRAP pictures.
CBS_UNIT_RANGE_INTERNAL_REF(HEVC_NAL_BLA_W_LP, HEVC_NAL_CRA_NUT,
H265RawSlice, data),
CBS_UNIT_TYPES_COMPLEX((HEVC_NAL_SEI_PREFIX, HEVC_NAL_SEI_SUFFIX),
H265RawSEI, cbs_h265_free_sei),
CBS_UNIT_TYPE_END_OF_LIST
};
static void cbs_h266_free_sei(FFRefStructOpaque unused, void *content)
{
H266RawSEI *sei = content;
ff_cbs_sei_free_message_list(&sei->message_list);
}
static const CodedBitstreamUnitTypeDescriptor cbs_h266_unit_types[] = {
CBS_UNIT_TYPE_INTERNAL_REF(VVC_DCI_NUT, H266RawDCI, extension_data.data),
CBS_UNIT_TYPE_INTERNAL_REF(VVC_OPI_NUT, H266RawOPI, extension_data.data),
CBS_UNIT_TYPE_INTERNAL_REF(VVC_VPS_NUT, H266RawVPS, extension_data.data),
{
.nb_unit_types = 1,
.unit_type.list[0] = VVC_SPS_NUT,
.content_type = CBS_CONTENT_TYPE_INTERNAL_REFS,
.content_size = sizeof(H266RawSPS),
.type.ref = {
.nb_offsets = 2,
.offsets = { offsetof(H266RawSPS, extension_data.data),
offsetof(H266RawSPS, vui.extension_data.data) }
},
},
CBS_UNIT_TYPE_INTERNAL_REF(VVC_PPS_NUT, H266RawPPS, extension_data.data),
CBS_UNIT_TYPE_INTERNAL_REF(VVC_PREFIX_APS_NUT, H266RawAPS, extension_data.data),
CBS_UNIT_TYPE_INTERNAL_REF(VVC_SUFFIX_APS_NUT, H266RawAPS, extension_data.data),
CBS_UNIT_TYPE_POD(VVC_PH_NUT , H266RawPH),
CBS_UNIT_TYPE_POD(VVC_AUD_NUT, H266RawAUD),
CBS_UNIT_RANGE_INTERNAL_REF(VVC_TRAIL_NUT, VVC_RASL_NUT,
H266RawSlice, data),
CBS_UNIT_RANGE_INTERNAL_REF(VVC_IDR_W_RADL, VVC_GDR_NUT,
H266RawSlice, data),
CBS_UNIT_TYPES_COMPLEX((VVC_PREFIX_SEI_NUT, VVC_SUFFIX_SEI_NUT),
H266RawSEI, cbs_h266_free_sei),
CBS_UNIT_TYPE_END_OF_LIST
};
const CodedBitstreamType ff_cbs_type_h264 = {
.codec_id = AV_CODEC_ID_H264,
.priv_data_size = sizeof(CodedBitstreamH264Context),
.unit_types = cbs_h264_unit_types,
.split_fragment = &cbs_h2645_split_fragment,
.read_unit = &cbs_h264_read_nal_unit,
.write_unit = &cbs_h264_write_nal_unit,
.discarded_unit = &cbs_h264_discarded_nal_unit,
.assemble_fragment = &cbs_h2645_assemble_fragment,
.flush = &cbs_h264_flush,
.close = &cbs_h264_close,
};
const CodedBitstreamType ff_cbs_type_h265 = {
.codec_id = AV_CODEC_ID_HEVC,
.priv_data_size = sizeof(CodedBitstreamH265Context),
.unit_types = cbs_h265_unit_types,
.split_fragment = &cbs_h2645_split_fragment,
.read_unit = &cbs_h265_read_nal_unit,
.write_unit = &cbs_h265_write_nal_unit,
.discarded_unit = &cbs_h265_discarded_nal_unit,
.assemble_fragment = &cbs_h2645_assemble_fragment,
.flush = &cbs_h265_flush,
.close = &cbs_h265_close,
};
const CodedBitstreamType ff_cbs_type_h266 = {
.codec_id = AV_CODEC_ID_VVC,
.priv_data_size = sizeof(CodedBitstreamH266Context),
.unit_types = cbs_h266_unit_types,
.split_fragment = &cbs_h2645_split_fragment,
.read_unit = &cbs_h266_read_nal_unit,
.write_unit = &cbs_h266_write_nal_unit,
.assemble_fragment = &cbs_h2645_assemble_fragment,
.flush = &cbs_h266_flush,
.close = &cbs_h266_close,
};
// Macro for the read/write pair.
#define SEI_MESSAGE_RW(codec, name) \
.read = cbs_ ## codec ## _read_ ## name ## _internal, \
.write = cbs_ ## codec ## _write_ ## name ## _internal
static const SEIMessageTypeDescriptor cbs_sei_common_types[] = {
{
SEI_TYPE_FILLER_PAYLOAD,
1, 1,
sizeof(SEIRawFillerPayload),
SEI_MESSAGE_RW(sei, filler_payload),
},
{
SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35,
1, 1,
sizeof(SEIRawUserDataRegistered),
SEI_MESSAGE_RW(sei, user_data_registered),
},
{
SEI_TYPE_USER_DATA_UNREGISTERED,
1, 1,
sizeof(SEIRawUserDataUnregistered),
SEI_MESSAGE_RW(sei, user_data_unregistered),
},
{
SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME,
1, 0,
sizeof(SEIRawMasteringDisplayColourVolume),
SEI_MESSAGE_RW(sei, mastering_display_colour_volume),
},
{
SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO,
1, 0,
sizeof(SEIRawContentLightLevelInfo),
SEI_MESSAGE_RW(sei, content_light_level_info),
},
{
SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS,
1, 0,
sizeof(SEIRawAlternativeTransferCharacteristics),
SEI_MESSAGE_RW(sei, alternative_transfer_characteristics),
},
{
SEI_TYPE_AMBIENT_VIEWING_ENVIRONMENT,
1, 0,
sizeof(SEIRawAmbientViewingEnvironment),
SEI_MESSAGE_RW(sei, ambient_viewing_environment),
},
SEI_MESSAGE_TYPE_END,
};
static const SEIMessageTypeDescriptor cbs_sei_h264_types[] = {
{
SEI_TYPE_BUFFERING_PERIOD,
1, 0,
sizeof(H264RawSEIBufferingPeriod),
SEI_MESSAGE_RW(h264, sei_buffering_period),
},
{
SEI_TYPE_PIC_TIMING,
1, 0,
sizeof(H264RawSEIPicTiming),
SEI_MESSAGE_RW(h264, sei_pic_timing),
},
{
SEI_TYPE_PAN_SCAN_RECT,
1, 0,
sizeof(H264RawSEIPanScanRect),
SEI_MESSAGE_RW(h264, sei_pan_scan_rect),
},
{
SEI_TYPE_RECOVERY_POINT,
1, 0,
sizeof(H264RawSEIRecoveryPoint),
SEI_MESSAGE_RW(h264, sei_recovery_point),
},
{
SEI_TYPE_FILM_GRAIN_CHARACTERISTICS,
1, 0,
sizeof(H264RawFilmGrainCharacteristics),
SEI_MESSAGE_RW(h264, film_grain_characteristics),
},
{
SEI_TYPE_DISPLAY_ORIENTATION,
1, 0,
sizeof(H264RawSEIDisplayOrientation),
SEI_MESSAGE_RW(h264, sei_display_orientation),
},
SEI_MESSAGE_TYPE_END
};
static const SEIMessageTypeDescriptor cbs_sei_h265_types[] = {
{
SEI_TYPE_BUFFERING_PERIOD,
1, 0,
sizeof(H265RawSEIBufferingPeriod),
SEI_MESSAGE_RW(h265, sei_buffering_period),
},
{
SEI_TYPE_PIC_TIMING,
1, 0,
sizeof(H265RawSEIPicTiming),
SEI_MESSAGE_RW(h265, sei_pic_timing),
},
{
SEI_TYPE_PAN_SCAN_RECT,
1, 0,
sizeof(H265RawSEIPanScanRect),
SEI_MESSAGE_RW(h265, sei_pan_scan_rect),
},
{
SEI_TYPE_RECOVERY_POINT,
1, 0,
sizeof(H265RawSEIRecoveryPoint),
SEI_MESSAGE_RW(h265, sei_recovery_point),
},
{
SEI_TYPE_FILM_GRAIN_CHARACTERISTICS,
1, 0,
sizeof(H265RawFilmGrainCharacteristics),
SEI_MESSAGE_RW(h265, film_grain_characteristics),
},
{
SEI_TYPE_DISPLAY_ORIENTATION,
1, 0,
sizeof(H265RawSEIDisplayOrientation),
SEI_MESSAGE_RW(h265, sei_display_orientation),
},
{
SEI_TYPE_ACTIVE_PARAMETER_SETS,
1, 0,
sizeof(H265RawSEIActiveParameterSets),
SEI_MESSAGE_RW(h265, sei_active_parameter_sets),
},
{
SEI_TYPE_DECODED_PICTURE_HASH,
0, 1,
sizeof(H265RawSEIDecodedPictureHash),
SEI_MESSAGE_RW(h265, sei_decoded_picture_hash),
},
{
SEI_TYPE_TIME_CODE,
1, 0,
sizeof(H265RawSEITimeCode),
SEI_MESSAGE_RW(h265, sei_time_code),
},
{
SEI_TYPE_ALPHA_CHANNEL_INFO,
1, 0,
sizeof(H265RawSEIAlphaChannelInfo),
SEI_MESSAGE_RW(h265, sei_alpha_channel_info),
},
SEI_MESSAGE_TYPE_END
};
static const SEIMessageTypeDescriptor cbs_sei_h266_types[] = {
{
SEI_TYPE_DECODED_PICTURE_HASH,
0, 1,
sizeof(H266RawSEIDecodedPictureHash),
SEI_MESSAGE_RW(h266, sei_decoded_picture_hash),
},
SEI_MESSAGE_TYPE_END
};
const SEIMessageTypeDescriptor *ff_cbs_sei_find_type(CodedBitstreamContext *ctx,
int payload_type)
{
const SEIMessageTypeDescriptor *codec_list;
int i;
for (i = 0; cbs_sei_common_types[i].type >= 0; i++) {
if (cbs_sei_common_types[i].type == payload_type)
return &cbs_sei_common_types[i];
}
switch (ctx->codec->codec_id) {
case AV_CODEC_ID_H264:
codec_list = cbs_sei_h264_types;
break;
case AV_CODEC_ID_H265:
codec_list = cbs_sei_h265_types;
break;
case AV_CODEC_ID_H266:
codec_list = cbs_sei_h266_types;
break;
default:
return NULL;
}
for (i = 0; codec_list[i].type >= 0; i++) {
if (codec_list[i].type == payload_type)
return &codec_list[i];
}
return NULL;
}
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