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7110a36ba0
The spec allows at least thirty-two zero bits followed by a one to mean 2^32-1, with no constraint on the number of zeroes. The libaom reference decoder does not match this, instead reading thirty-two zeroes but not the following one to mean 2^32-1. These two interpretations are incompatible and other implementations may follow one or the other. Therefore reject thirty-two zeroes because the intended behaviour is not clear. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
1309 lines
39 KiB
C
1309 lines
39 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixfmt.h"
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#include "cbs.h"
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#include "cbs_internal.h"
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#include "cbs_av1.h"
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#include "defs.h"
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#include "refstruct.h"
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static int cbs_av1_read_uvlc(CodedBitstreamContext *ctx, GetBitContext *gbc,
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const char *name, uint32_t *write_to,
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uint32_t range_min, uint32_t range_max)
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{
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uint32_t zeroes, bits_value, value;
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CBS_TRACE_READ_START();
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zeroes = 0;
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while (zeroes < 32) {
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if (get_bits_left(gbc) < 1) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid uvlc code at "
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"%s: bitstream ended.\n", name);
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return AVERROR_INVALIDDATA;
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}
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if (get_bits1(gbc))
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break;
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++zeroes;
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}
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if (zeroes >= 32) {
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// The spec allows at least thirty-two zero bits followed by a
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// one to mean 2^32-1, with no constraint on the number of
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// zeroes. The libaom reference decoder does not match this,
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// instead reading thirty-two zeroes but not the following one
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// to mean 2^32-1. These two interpretations are incompatible
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// and other implementations may follow one or the other.
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// Therefore we reject thirty-two zeroes because the intended
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// behaviour is not clear.
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Thirty-two zero bits in "
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"%s uvlc code: considered invalid due to conflicting "
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"standard and reference decoder behaviour.\n", name);
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return AVERROR_INVALIDDATA;
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} else {
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if (get_bits_left(gbc) < zeroes) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid uvlc code at "
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"%s: bitstream ended.\n", name);
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return AVERROR_INVALIDDATA;
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}
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bits_value = get_bits_long(gbc, zeroes);
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value = bits_value + (UINT32_C(1) << zeroes) - 1;
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}
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CBS_TRACE_READ_END_NO_SUBSCRIPTS();
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if (value < range_min || value > range_max) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
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"%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
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name, value, range_min, range_max);
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return AVERROR_INVALIDDATA;
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}
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*write_to = value;
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return 0;
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}
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static int cbs_av1_write_uvlc(CodedBitstreamContext *ctx, PutBitContext *pbc,
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const char *name, uint32_t value,
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uint32_t range_min, uint32_t range_max)
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{
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uint32_t v;
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int zeroes;
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CBS_TRACE_WRITE_START();
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if (value < range_min || value > range_max) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
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"%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
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name, value, range_min, range_max);
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return AVERROR_INVALIDDATA;
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}
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zeroes = av_log2(value + 1);
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v = value - (1U << zeroes) + 1;
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if (put_bits_left(pbc) < 2 * zeroes + 1)
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return AVERROR(ENOSPC);
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put_bits(pbc, zeroes, 0);
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put_bits(pbc, 1, 1);
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put_bits(pbc, zeroes, v);
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CBS_TRACE_WRITE_END_NO_SUBSCRIPTS();
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return 0;
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}
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static int cbs_av1_read_leb128(CodedBitstreamContext *ctx, GetBitContext *gbc,
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const char *name, uint64_t *write_to)
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{
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uint64_t value;
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uint32_t byte;
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int i;
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CBS_TRACE_READ_START();
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value = 0;
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for (i = 0; i < 8; i++) {
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if (get_bits_left(gbc) < 8) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid leb128 at "
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"%s: bitstream ended.\n", name);
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return AVERROR_INVALIDDATA;
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}
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byte = get_bits(gbc, 8);
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value |= (uint64_t)(byte & 0x7f) << (i * 7);
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if (!(byte & 0x80))
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break;
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}
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if (value > UINT32_MAX)
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return AVERROR_INVALIDDATA;
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CBS_TRACE_READ_END_NO_SUBSCRIPTS();
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*write_to = value;
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return 0;
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}
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static int cbs_av1_write_leb128(CodedBitstreamContext *ctx, PutBitContext *pbc,
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const char *name, uint64_t value, int fixed_length)
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{
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int len, i;
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uint8_t byte;
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CBS_TRACE_WRITE_START();
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len = (av_log2(value) + 7) / 7;
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if (fixed_length) {
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if (fixed_length < len) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "OBU is too large for "
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"fixed length size field (%d > %d).\n",
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len, fixed_length);
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return AVERROR(EINVAL);
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}
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len = fixed_length;
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}
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for (i = 0; i < len; i++) {
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if (put_bits_left(pbc) < 8)
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return AVERROR(ENOSPC);
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byte = value >> (7 * i) & 0x7f;
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if (i < len - 1)
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byte |= 0x80;
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put_bits(pbc, 8, byte);
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}
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CBS_TRACE_WRITE_END_NO_SUBSCRIPTS();
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return 0;
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}
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static int cbs_av1_read_ns(CodedBitstreamContext *ctx, GetBitContext *gbc,
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uint32_t n, const char *name,
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const int *subscripts, uint32_t *write_to)
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{
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uint32_t m, v, extra_bit, value;
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int w;
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CBS_TRACE_READ_START();
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av_assert0(n > 0);
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w = av_log2(n) + 1;
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m = (1 << w) - n;
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if (get_bits_left(gbc) < w) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid non-symmetric value at "
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"%s: bitstream ended.\n", name);
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return AVERROR_INVALIDDATA;
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}
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if (w - 1 > 0)
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v = get_bits(gbc, w - 1);
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else
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v = 0;
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if (v < m) {
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value = v;
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} else {
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extra_bit = get_bits1(gbc);
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value = (v << 1) - m + extra_bit;
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}
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CBS_TRACE_READ_END();
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*write_to = value;
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return 0;
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}
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static int cbs_av1_write_ns(CodedBitstreamContext *ctx, PutBitContext *pbc,
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uint32_t n, const char *name,
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const int *subscripts, uint32_t value)
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{
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uint32_t w, m, v, extra_bit;
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CBS_TRACE_WRITE_START();
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if (value > n) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
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"%"PRIu32", but must be in [0,%"PRIu32"].\n",
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name, value, n);
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return AVERROR_INVALIDDATA;
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}
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w = av_log2(n) + 1;
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m = (1 << w) - n;
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if (put_bits_left(pbc) < w)
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return AVERROR(ENOSPC);
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if (value < m) {
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v = value;
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put_bits(pbc, w - 1, v);
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} else {
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v = m + ((value - m) >> 1);
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extra_bit = (value - m) & 1;
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put_bits(pbc, w - 1, v);
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put_bits(pbc, 1, extra_bit);
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}
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CBS_TRACE_WRITE_END();
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return 0;
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}
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static int cbs_av1_read_increment(CodedBitstreamContext *ctx, GetBitContext *gbc,
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uint32_t range_min, uint32_t range_max,
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const char *name, uint32_t *write_to)
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{
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uint32_t value;
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CBS_TRACE_READ_START();
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av_assert0(range_min <= range_max && range_max - range_min < 32);
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for (value = range_min; value < range_max;) {
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if (get_bits_left(gbc) < 1) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid increment value at "
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"%s: bitstream ended.\n", name);
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return AVERROR_INVALIDDATA;
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}
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if (get_bits1(gbc))
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++value;
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else
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break;
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}
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CBS_TRACE_READ_END_NO_SUBSCRIPTS();
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*write_to = value;
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return 0;
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}
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static int cbs_av1_write_increment(CodedBitstreamContext *ctx, PutBitContext *pbc,
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uint32_t range_min, uint32_t range_max,
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const char *name, uint32_t value)
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{
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int len;
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CBS_TRACE_WRITE_START();
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av_assert0(range_min <= range_max && range_max - range_min < 32);
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if (value < range_min || value > range_max) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
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"%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
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name, value, range_min, range_max);
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return AVERROR_INVALIDDATA;
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}
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if (value == range_max)
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len = range_max - range_min;
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else
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len = value - range_min + 1;
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if (put_bits_left(pbc) < len)
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return AVERROR(ENOSPC);
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if (len > 0)
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put_bits(pbc, len, (1U << len) - 1 - (value != range_max));
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CBS_TRACE_WRITE_END_NO_SUBSCRIPTS();
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return 0;
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}
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static int cbs_av1_read_subexp(CodedBitstreamContext *ctx, GetBitContext *gbc,
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uint32_t range_max, const char *name,
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const int *subscripts, uint32_t *write_to)
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{
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uint32_t value, max_len, len, range_offset, range_bits;
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int err;
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CBS_TRACE_READ_START();
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av_assert0(range_max > 0);
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max_len = av_log2(range_max - 1) - 3;
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err = cbs_av1_read_increment(ctx, gbc, 0, max_len,
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"subexp_more_bits", &len);
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if (err < 0)
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return err;
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if (len) {
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range_bits = 2 + len;
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range_offset = 1 << range_bits;
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} else {
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range_bits = 3;
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range_offset = 0;
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}
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if (len < max_len) {
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err = ff_cbs_read_simple_unsigned(ctx, gbc, range_bits,
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"subexp_bits", &value);
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if (err < 0)
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return err;
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} else {
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err = cbs_av1_read_ns(ctx, gbc, range_max - range_offset,
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"subexp_final_bits", NULL, &value);
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if (err < 0)
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return err;
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}
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value += range_offset;
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CBS_TRACE_READ_END_VALUE_ONLY();
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*write_to = value;
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return err;
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}
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static int cbs_av1_write_subexp(CodedBitstreamContext *ctx, PutBitContext *pbc,
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uint32_t range_max, const char *name,
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const int *subscripts, uint32_t value)
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{
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int err;
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uint32_t max_len, len, range_offset, range_bits;
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CBS_TRACE_WRITE_START();
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if (value > range_max) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
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"%"PRIu32", but must be in [0,%"PRIu32"].\n",
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name, value, range_max);
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return AVERROR_INVALIDDATA;
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}
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av_assert0(range_max > 0);
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max_len = av_log2(range_max - 1) - 3;
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if (value < 8) {
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range_bits = 3;
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range_offset = 0;
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len = 0;
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} else {
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range_bits = av_log2(value);
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len = range_bits - 2;
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if (len > max_len) {
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// The top bin is combined with the one below it.
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av_assert0(len == max_len + 1);
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--range_bits;
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len = max_len;
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}
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range_offset = 1 << range_bits;
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}
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err = cbs_av1_write_increment(ctx, pbc, 0, max_len,
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"subexp_more_bits", len);
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if (err < 0)
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return err;
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if (len < max_len) {
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err = ff_cbs_write_simple_unsigned(ctx, pbc, range_bits,
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"subexp_bits",
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value - range_offset);
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if (err < 0)
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return err;
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} else {
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err = cbs_av1_write_ns(ctx, pbc, range_max - range_offset,
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"subexp_final_bits", NULL,
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value - range_offset);
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if (err < 0)
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return err;
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}
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CBS_TRACE_WRITE_END_VALUE_ONLY();
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return err;
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}
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static int cbs_av1_tile_log2(int blksize, int target)
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{
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int k;
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for (k = 0; (blksize << k) < target; k++);
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return k;
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}
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static int cbs_av1_get_relative_dist(const AV1RawSequenceHeader *seq,
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unsigned int a, unsigned int b)
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{
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unsigned int diff, m;
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if (!seq->enable_order_hint)
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return 0;
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diff = a - b;
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m = 1 << seq->order_hint_bits_minus_1;
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diff = (diff & (m - 1)) - (diff & m);
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return diff;
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}
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static size_t cbs_av1_get_payload_bytes_left(GetBitContext *gbc)
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{
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GetBitContext tmp = *gbc;
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size_t size = 0;
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for (int i = 0; get_bits_left(&tmp) >= 8; i++) {
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if (get_bits(&tmp, 8))
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size = i;
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}
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return size;
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}
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#define HEADER(name) do { \
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ff_cbs_trace_header(ctx, name); \
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} while (0)
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#define CHECK(call) do { \
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err = (call); \
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if (err < 0) \
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return err; \
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} while (0)
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#define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
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#define FUNC_AV1(rw, name) FUNC_NAME(rw, av1, name)
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#define FUNC(name) FUNC_AV1(READWRITE, name)
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#define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
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#define fc(width, name, range_min, range_max) \
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xf(width, name, current->name, range_min, range_max, 0, )
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#define flag(name) fb(1, name)
|
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#define su(width, name) \
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xsu(width, name, current->name, 0, )
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|
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#define fbs(width, name, subs, ...) \
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xf(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
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#define fcs(width, name, range_min, range_max, subs, ...) \
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xf(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
|
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#define flags(name, subs, ...) \
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xf(1, name, current->name, 0, 1, subs, __VA_ARGS__)
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#define sus(width, name, subs, ...) \
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xsu(width, name, current->name, subs, __VA_ARGS__)
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|
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#define fixed(width, name, value) do { \
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av_unused uint32_t fixed_value = value; \
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xf(width, name, fixed_value, value, value, 0, ); \
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} while (0)
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|
|
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#define READ
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#define READWRITE read
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#define RWContext GetBitContext
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|
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#define fb(width, name) do { \
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uint32_t value; \
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CHECK(ff_cbs_read_simple_unsigned(ctx, rw, width, \
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#name, &value)); \
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current->name = value; \
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} while (0)
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|
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#define xf(width, name, var, range_min, range_max, subs, ...) do { \
|
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uint32_t value; \
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CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
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SUBSCRIPTS(subs, __VA_ARGS__), \
|
|
&value, range_min, range_max)); \
|
|
var = value; \
|
|
} while (0)
|
|
|
|
#define xsu(width, name, var, subs, ...) do { \
|
|
int32_t value; \
|
|
CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
|
|
SUBSCRIPTS(subs, __VA_ARGS__), &value, \
|
|
MIN_INT_BITS(width), \
|
|
MAX_INT_BITS(width))); \
|
|
var = value; \
|
|
} while (0)
|
|
|
|
#define uvlc(name, range_min, range_max) do { \
|
|
uint32_t value; \
|
|
CHECK(cbs_av1_read_uvlc(ctx, rw, #name, \
|
|
&value, range_min, range_max)); \
|
|
current->name = value; \
|
|
} while (0)
|
|
|
|
#define ns(max_value, name, subs, ...) do { \
|
|
uint32_t value; \
|
|
CHECK(cbs_av1_read_ns(ctx, rw, max_value, #name, \
|
|
SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
|
|
current->name = value; \
|
|
} while (0)
|
|
|
|
#define increment(name, min, max) do { \
|
|
uint32_t value; \
|
|
CHECK(cbs_av1_read_increment(ctx, rw, min, max, #name, &value)); \
|
|
current->name = value; \
|
|
} while (0)
|
|
|
|
#define subexp(name, max, subs, ...) do { \
|
|
uint32_t value; \
|
|
CHECK(cbs_av1_read_subexp(ctx, rw, max, #name, \
|
|
SUBSCRIPTS(subs, __VA_ARGS__), &value)); \
|
|
current->name = value; \
|
|
} while (0)
|
|
|
|
#define delta_q(name) do { \
|
|
uint8_t delta_coded; \
|
|
int8_t delta_q; \
|
|
xf(1, name.delta_coded, delta_coded, 0, 1, 0, ); \
|
|
if (delta_coded) \
|
|
xsu(1 + 6, name.delta_q, delta_q, 0, ); \
|
|
else \
|
|
delta_q = 0; \
|
|
current->name = delta_q; \
|
|
} while (0)
|
|
|
|
#define leb128(name) do { \
|
|
uint64_t value; \
|
|
CHECK(cbs_av1_read_leb128(ctx, rw, #name, &value)); \
|
|
current->name = value; \
|
|
} while (0)
|
|
|
|
#define infer(name, value) do { \
|
|
current->name = value; \
|
|
} while (0)
|
|
|
|
#define byte_alignment(rw) (get_bits_count(rw) % 8)
|
|
|
|
#include "cbs_av1_syntax_template.c"
|
|
|
|
#undef READ
|
|
#undef READWRITE
|
|
#undef RWContext
|
|
#undef fb
|
|
#undef xf
|
|
#undef xsu
|
|
#undef uvlc
|
|
#undef ns
|
|
#undef increment
|
|
#undef subexp
|
|
#undef delta_q
|
|
#undef leb128
|
|
#undef infer
|
|
#undef byte_alignment
|
|
|
|
|
|
#define WRITE
|
|
#define READWRITE write
|
|
#define RWContext PutBitContext
|
|
|
|
#define fb(width, name) do { \
|
|
CHECK(ff_cbs_write_simple_unsigned(ctx, rw, width, #name, \
|
|
current->name)); \
|
|
} while (0)
|
|
|
|
#define xf(width, name, var, range_min, range_max, subs, ...) do { \
|
|
CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
|
|
SUBSCRIPTS(subs, __VA_ARGS__), \
|
|
var, range_min, range_max)); \
|
|
} while (0)
|
|
|
|
#define xsu(width, name, var, subs, ...) do { \
|
|
CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
|
|
SUBSCRIPTS(subs, __VA_ARGS__), var, \
|
|
MIN_INT_BITS(width), \
|
|
MAX_INT_BITS(width))); \
|
|
} while (0)
|
|
|
|
#define uvlc(name, range_min, range_max) do { \
|
|
CHECK(cbs_av1_write_uvlc(ctx, rw, #name, current->name, \
|
|
range_min, range_max)); \
|
|
} while (0)
|
|
|
|
#define ns(max_value, name, subs, ...) do { \
|
|
CHECK(cbs_av1_write_ns(ctx, rw, max_value, #name, \
|
|
SUBSCRIPTS(subs, __VA_ARGS__), \
|
|
current->name)); \
|
|
} while (0)
|
|
|
|
#define increment(name, min, max) do { \
|
|
CHECK(cbs_av1_write_increment(ctx, rw, min, max, #name, \
|
|
current->name)); \
|
|
} while (0)
|
|
|
|
#define subexp(name, max, subs, ...) do { \
|
|
CHECK(cbs_av1_write_subexp(ctx, rw, max, #name, \
|
|
SUBSCRIPTS(subs, __VA_ARGS__), \
|
|
current->name)); \
|
|
} while (0)
|
|
|
|
#define delta_q(name) do { \
|
|
xf(1, name.delta_coded, current->name != 0, 0, 1, 0, ); \
|
|
if (current->name) \
|
|
xsu(1 + 6, name.delta_q, current->name, 0, ); \
|
|
} while (0)
|
|
|
|
#define leb128(name) do { \
|
|
CHECK(cbs_av1_write_leb128(ctx, rw, #name, current->name, 0)); \
|
|
} 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 byte_alignment(rw) (put_bits_count(rw) % 8)
|
|
|
|
#include "cbs_av1_syntax_template.c"
|
|
|
|
#undef WRITE
|
|
#undef READWRITE
|
|
#undef RWContext
|
|
#undef fb
|
|
#undef xf
|
|
#undef xsu
|
|
#undef uvlc
|
|
#undef ns
|
|
#undef increment
|
|
#undef subexp
|
|
#undef delta_q
|
|
#undef leb128
|
|
#undef infer
|
|
#undef byte_alignment
|
|
|
|
|
|
static int cbs_av1_split_fragment(CodedBitstreamContext *ctx,
|
|
CodedBitstreamFragment *frag,
|
|
int header)
|
|
{
|
|
GetBitContext gbc;
|
|
uint8_t *data;
|
|
size_t size;
|
|
uint64_t obu_length;
|
|
int pos, err, trace;
|
|
|
|
// Don't include this parsing in trace output.
|
|
trace = ctx->trace_enable;
|
|
ctx->trace_enable = 0;
|
|
|
|
data = frag->data;
|
|
size = frag->data_size;
|
|
|
|
if (INT_MAX / 8 < size) {
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid fragment: "
|
|
"too large (%"SIZE_SPECIFIER" bytes).\n", size);
|
|
err = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
if (header && size && data[0] & 0x80) {
|
|
// first bit is nonzero, the extradata does not consist purely of
|
|
// OBUs. Expect MP4/Matroska AV1CodecConfigurationRecord
|
|
int config_record_version = data[0] & 0x7f;
|
|
|
|
if (config_record_version != 1) {
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR,
|
|
"Unknown version %d of AV1CodecConfigurationRecord "
|
|
"found!\n",
|
|
config_record_version);
|
|
err = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
if (size <= 4) {
|
|
if (size < 4) {
|
|
av_log(ctx->log_ctx, AV_LOG_WARNING,
|
|
"Undersized AV1CodecConfigurationRecord v%d found!\n",
|
|
config_record_version);
|
|
err = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
goto success;
|
|
}
|
|
|
|
// In AV1CodecConfigurationRecord v1, actual OBUs start after
|
|
// four bytes. Thus set the offset as required for properly
|
|
// parsing them.
|
|
data += 4;
|
|
size -= 4;
|
|
}
|
|
|
|
while (size > 0) {
|
|
AV1RawOBUHeader header;
|
|
uint64_t obu_size;
|
|
|
|
init_get_bits(&gbc, data, 8 * size);
|
|
|
|
err = cbs_av1_read_obu_header(ctx, &gbc, &header);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
if (header.obu_has_size_field) {
|
|
if (get_bits_left(&gbc) < 8) {
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU: fragment "
|
|
"too short (%"SIZE_SPECIFIER" bytes).\n", size);
|
|
err = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
|
|
if (err < 0)
|
|
goto fail;
|
|
} else
|
|
obu_size = size - 1 - header.obu_extension_flag;
|
|
|
|
pos = get_bits_count(&gbc);
|
|
av_assert0(pos % 8 == 0 && pos / 8 <= size);
|
|
|
|
obu_length = pos / 8 + obu_size;
|
|
|
|
if (size < obu_length) {
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU length: "
|
|
"%"PRIu64", but only %"SIZE_SPECIFIER" bytes remaining in fragment.\n",
|
|
obu_length, size);
|
|
err = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
err = ff_cbs_append_unit_data(frag, header.obu_type,
|
|
data, obu_length, frag->data_ref);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
data += obu_length;
|
|
size -= obu_length;
|
|
}
|
|
|
|
success:
|
|
err = 0;
|
|
fail:
|
|
ctx->trace_enable = trace;
|
|
return err;
|
|
}
|
|
|
|
static int cbs_av1_ref_tile_data(CodedBitstreamContext *ctx,
|
|
CodedBitstreamUnit *unit,
|
|
GetBitContext *gbc,
|
|
AV1RawTileData *td)
|
|
{
|
|
int pos;
|
|
|
|
pos = get_bits_count(gbc);
|
|
if (pos >= 8 * unit->data_size) {
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Bitstream ended before "
|
|
"any data in tile group (%d bits read).\n", pos);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
// Must be byte-aligned at this point.
|
|
av_assert0(pos % 8 == 0);
|
|
|
|
td->data_ref = av_buffer_ref(unit->data_ref);
|
|
if (!td->data_ref)
|
|
return AVERROR(ENOMEM);
|
|
|
|
td->data = unit->data + pos / 8;
|
|
td->data_size = unit->data_size - pos / 8;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cbs_av1_read_unit(CodedBitstreamContext *ctx,
|
|
CodedBitstreamUnit *unit)
|
|
{
|
|
CodedBitstreamAV1Context *priv = ctx->priv_data;
|
|
AV1RawOBU *obu;
|
|
GetBitContext gbc;
|
|
int err, start_pos, end_pos;
|
|
|
|
err = ff_cbs_alloc_unit_content(ctx, unit);
|
|
if (err < 0)
|
|
return err;
|
|
obu = unit->content;
|
|
|
|
err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = cbs_av1_read_obu_header(ctx, &gbc, &obu->header);
|
|
if (err < 0)
|
|
return err;
|
|
av_assert0(obu->header.obu_type == unit->type);
|
|
|
|
if (obu->header.obu_has_size_field) {
|
|
uint64_t obu_size;
|
|
err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
|
|
if (err < 0)
|
|
return err;
|
|
obu->obu_size = obu_size;
|
|
} else {
|
|
if (unit->data_size < 1 + obu->header.obu_extension_flag) {
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU length: "
|
|
"unit too short (%"SIZE_SPECIFIER").\n", unit->data_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
obu->obu_size = unit->data_size - 1 - obu->header.obu_extension_flag;
|
|
}
|
|
|
|
start_pos = get_bits_count(&gbc);
|
|
|
|
if (obu->header.obu_extension_flag) {
|
|
if (obu->header.obu_type != AV1_OBU_SEQUENCE_HEADER &&
|
|
obu->header.obu_type != AV1_OBU_TEMPORAL_DELIMITER &&
|
|
priv->operating_point_idc) {
|
|
int in_temporal_layer =
|
|
(priv->operating_point_idc >> priv->temporal_id ) & 1;
|
|
int in_spatial_layer =
|
|
(priv->operating_point_idc >> (priv->spatial_id + 8)) & 1;
|
|
if (!in_temporal_layer || !in_spatial_layer) {
|
|
return AVERROR(EAGAIN); // drop_obu()
|
|
}
|
|
}
|
|
}
|
|
|
|
switch (obu->header.obu_type) {
|
|
case AV1_OBU_SEQUENCE_HEADER:
|
|
{
|
|
err = cbs_av1_read_sequence_header_obu(ctx, &gbc,
|
|
&obu->obu.sequence_header);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (priv->operating_point >= 0) {
|
|
AV1RawSequenceHeader *sequence_header = &obu->obu.sequence_header;
|
|
|
|
if (priv->operating_point > sequence_header->operating_points_cnt_minus_1) {
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid Operating Point %d requested. "
|
|
"Must not be higher than %u.\n",
|
|
priv->operating_point, sequence_header->operating_points_cnt_minus_1);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
priv->operating_point_idc = sequence_header->operating_point_idc[priv->operating_point];
|
|
}
|
|
|
|
ff_refstruct_replace(&priv->sequence_header_ref, unit->content_ref);
|
|
priv->sequence_header = &obu->obu.sequence_header;
|
|
}
|
|
break;
|
|
case AV1_OBU_TEMPORAL_DELIMITER:
|
|
{
|
|
err = cbs_av1_read_temporal_delimiter_obu(ctx, &gbc);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
break;
|
|
case AV1_OBU_FRAME_HEADER:
|
|
case AV1_OBU_REDUNDANT_FRAME_HEADER:
|
|
{
|
|
err = cbs_av1_read_frame_header_obu(ctx, &gbc,
|
|
&obu->obu.frame_header,
|
|
obu->header.obu_type ==
|
|
AV1_OBU_REDUNDANT_FRAME_HEADER,
|
|
unit->data_ref);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
break;
|
|
case AV1_OBU_TILE_GROUP:
|
|
{
|
|
err = cbs_av1_read_tile_group_obu(ctx, &gbc,
|
|
&obu->obu.tile_group);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
|
|
&obu->obu.tile_group.tile_data);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
break;
|
|
case AV1_OBU_FRAME:
|
|
{
|
|
err = cbs_av1_read_frame_obu(ctx, &gbc, &obu->obu.frame,
|
|
unit->data_ref);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
|
|
&obu->obu.frame.tile_group.tile_data);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
break;
|
|
case AV1_OBU_TILE_LIST:
|
|
{
|
|
err = cbs_av1_read_tile_list_obu(ctx, &gbc,
|
|
&obu->obu.tile_list);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = cbs_av1_ref_tile_data(ctx, unit, &gbc,
|
|
&obu->obu.tile_list.tile_data);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
break;
|
|
case AV1_OBU_METADATA:
|
|
{
|
|
err = cbs_av1_read_metadata_obu(ctx, &gbc, &obu->obu.metadata);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
break;
|
|
case AV1_OBU_PADDING:
|
|
{
|
|
err = cbs_av1_read_padding_obu(ctx, &gbc, &obu->obu.padding);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
break;
|
|
default:
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
end_pos = get_bits_count(&gbc);
|
|
av_assert0(end_pos <= unit->data_size * 8);
|
|
|
|
if (obu->obu_size > 0 &&
|
|
obu->header.obu_type != AV1_OBU_TILE_GROUP &&
|
|
obu->header.obu_type != AV1_OBU_TILE_LIST &&
|
|
obu->header.obu_type != AV1_OBU_FRAME) {
|
|
int nb_bits = obu->obu_size * 8 + start_pos - end_pos;
|
|
|
|
if (nb_bits <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
err = cbs_av1_read_trailing_bits(ctx, &gbc, nb_bits);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cbs_av1_write_obu(CodedBitstreamContext *ctx,
|
|
CodedBitstreamUnit *unit,
|
|
PutBitContext *pbc)
|
|
{
|
|
CodedBitstreamAV1Context *priv = ctx->priv_data;
|
|
AV1RawOBU *obu = unit->content;
|
|
PutBitContext pbc_tmp;
|
|
AV1RawTileData *td;
|
|
size_t header_size;
|
|
int err, start_pos, end_pos, data_pos;
|
|
CodedBitstreamAV1Context av1ctx;
|
|
|
|
// OBUs in the normal bitstream format must contain a size field
|
|
// in every OBU (in annex B it is optional, but we don't support
|
|
// writing that).
|
|
obu->header.obu_has_size_field = 1;
|
|
av1ctx = *priv;
|
|
|
|
if (priv->sequence_header_ref) {
|
|
av1ctx.sequence_header_ref = ff_refstruct_ref(priv->sequence_header_ref);
|
|
}
|
|
|
|
if (priv->frame_header_ref) {
|
|
av1ctx.frame_header_ref = av_buffer_ref(priv->frame_header_ref);
|
|
if (!av1ctx.frame_header_ref) {
|
|
err = AVERROR(ENOMEM);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
err = cbs_av1_write_obu_header(ctx, pbc, &obu->header);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
if (obu->header.obu_has_size_field) {
|
|
pbc_tmp = *pbc;
|
|
if (priv->fixed_obu_size_length) {
|
|
for (int i = 0; i < priv->fixed_obu_size_length; i++)
|
|
put_bits(pbc, 8, 0);
|
|
} else {
|
|
// Add space for the size field to fill later.
|
|
put_bits32(pbc, 0);
|
|
put_bits32(pbc, 0);
|
|
}
|
|
}
|
|
|
|
td = NULL;
|
|
start_pos = put_bits_count(pbc);
|
|
|
|
switch (obu->header.obu_type) {
|
|
case AV1_OBU_SEQUENCE_HEADER:
|
|
{
|
|
err = cbs_av1_write_sequence_header_obu(ctx, pbc,
|
|
&obu->obu.sequence_header);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
ff_refstruct_unref(&priv->sequence_header_ref);
|
|
priv->sequence_header = NULL;
|
|
|
|
err = ff_cbs_make_unit_refcounted(ctx, unit);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
priv->sequence_header_ref = ff_refstruct_ref(unit->content_ref);
|
|
priv->sequence_header = &obu->obu.sequence_header;
|
|
}
|
|
break;
|
|
case AV1_OBU_TEMPORAL_DELIMITER:
|
|
{
|
|
err = cbs_av1_write_temporal_delimiter_obu(ctx, pbc);
|
|
if (err < 0)
|
|
goto error;
|
|
}
|
|
break;
|
|
case AV1_OBU_FRAME_HEADER:
|
|
case AV1_OBU_REDUNDANT_FRAME_HEADER:
|
|
{
|
|
err = cbs_av1_write_frame_header_obu(ctx, pbc,
|
|
&obu->obu.frame_header,
|
|
obu->header.obu_type ==
|
|
AV1_OBU_REDUNDANT_FRAME_HEADER,
|
|
NULL);
|
|
if (err < 0)
|
|
goto error;
|
|
}
|
|
break;
|
|
case AV1_OBU_TILE_GROUP:
|
|
{
|
|
err = cbs_av1_write_tile_group_obu(ctx, pbc,
|
|
&obu->obu.tile_group);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
td = &obu->obu.tile_group.tile_data;
|
|
}
|
|
break;
|
|
case AV1_OBU_FRAME:
|
|
{
|
|
err = cbs_av1_write_frame_obu(ctx, pbc, &obu->obu.frame, NULL);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
td = &obu->obu.frame.tile_group.tile_data;
|
|
}
|
|
break;
|
|
case AV1_OBU_TILE_LIST:
|
|
{
|
|
err = cbs_av1_write_tile_list_obu(ctx, pbc, &obu->obu.tile_list);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
td = &obu->obu.tile_list.tile_data;
|
|
}
|
|
break;
|
|
case AV1_OBU_METADATA:
|
|
{
|
|
err = cbs_av1_write_metadata_obu(ctx, pbc, &obu->obu.metadata);
|
|
if (err < 0)
|
|
goto error;
|
|
}
|
|
break;
|
|
case AV1_OBU_PADDING:
|
|
{
|
|
err = cbs_av1_write_padding_obu(ctx, pbc, &obu->obu.padding);
|
|
if (err < 0)
|
|
goto error;
|
|
}
|
|
break;
|
|
default:
|
|
err = AVERROR(ENOSYS);
|
|
goto error;
|
|
}
|
|
|
|
end_pos = put_bits_count(pbc);
|
|
header_size = (end_pos - start_pos + 7) / 8;
|
|
if (td) {
|
|
obu->obu_size = header_size + td->data_size;
|
|
} else if (header_size > 0) {
|
|
// Add trailing bits and recalculate.
|
|
err = cbs_av1_write_trailing_bits(ctx, pbc, 8 - end_pos % 8);
|
|
if (err < 0)
|
|
goto error;
|
|
end_pos = put_bits_count(pbc);
|
|
obu->obu_size = header_size = (end_pos - start_pos + 7) / 8;
|
|
} else {
|
|
// Empty OBU.
|
|
obu->obu_size = 0;
|
|
}
|
|
|
|
end_pos = put_bits_count(pbc);
|
|
// Must now be byte-aligned.
|
|
av_assert0(end_pos % 8 == 0);
|
|
flush_put_bits(pbc);
|
|
start_pos /= 8;
|
|
end_pos /= 8;
|
|
|
|
*pbc = pbc_tmp;
|
|
err = cbs_av1_write_leb128(ctx, pbc, "obu_size", obu->obu_size,
|
|
priv->fixed_obu_size_length);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
data_pos = put_bits_count(pbc) / 8;
|
|
flush_put_bits(pbc);
|
|
av_assert0(data_pos <= start_pos);
|
|
|
|
if (8 * obu->obu_size > put_bits_left(pbc)) {
|
|
ff_refstruct_unref(&priv->sequence_header_ref);
|
|
av_buffer_unref(&priv->frame_header_ref);
|
|
*priv = av1ctx;
|
|
|
|
return AVERROR(ENOSPC);
|
|
}
|
|
|
|
if (obu->obu_size > 0) {
|
|
if (!priv->fixed_obu_size_length) {
|
|
memmove(pbc->buf + data_pos,
|
|
pbc->buf + start_pos, header_size);
|
|
} else {
|
|
// The size was fixed so the following data was
|
|
// already written in the correct place.
|
|
}
|
|
skip_put_bytes(pbc, header_size);
|
|
|
|
if (td) {
|
|
memcpy(pbc->buf + data_pos + header_size,
|
|
td->data, td->data_size);
|
|
skip_put_bytes(pbc, td->data_size);
|
|
}
|
|
}
|
|
|
|
// OBU data must be byte-aligned.
|
|
av_assert0(put_bits_count(pbc) % 8 == 0);
|
|
err = 0;
|
|
|
|
error:
|
|
ff_refstruct_unref(&av1ctx.sequence_header_ref);
|
|
av_buffer_unref(&av1ctx.frame_header_ref);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int cbs_av1_assemble_fragment(CodedBitstreamContext *ctx,
|
|
CodedBitstreamFragment *frag)
|
|
{
|
|
size_t size, pos;
|
|
int i;
|
|
|
|
size = 0;
|
|
for (i = 0; i < frag->nb_units; i++)
|
|
size += frag->units[i].data_size;
|
|
|
|
frag->data_ref = av_buffer_alloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!frag->data_ref)
|
|
return AVERROR(ENOMEM);
|
|
frag->data = frag->data_ref->data;
|
|
memset(frag->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
pos = 0;
|
|
for (i = 0; i < frag->nb_units; i++) {
|
|
memcpy(frag->data + pos, frag->units[i].data,
|
|
frag->units[i].data_size);
|
|
pos += frag->units[i].data_size;
|
|
}
|
|
av_assert0(pos == size);
|
|
frag->data_size = size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cbs_av1_flush(CodedBitstreamContext *ctx)
|
|
{
|
|
CodedBitstreamAV1Context *priv = ctx->priv_data;
|
|
|
|
av_buffer_unref(&priv->frame_header_ref);
|
|
priv->sequence_header = NULL;
|
|
priv->frame_header = NULL;
|
|
|
|
memset(priv->ref, 0, sizeof(priv->ref));
|
|
priv->operating_point_idc = 0;
|
|
priv->seen_frame_header = 0;
|
|
priv->tile_num = 0;
|
|
}
|
|
|
|
static void cbs_av1_close(CodedBitstreamContext *ctx)
|
|
{
|
|
CodedBitstreamAV1Context *priv = ctx->priv_data;
|
|
|
|
ff_refstruct_unref(&priv->sequence_header_ref);
|
|
av_buffer_unref(&priv->frame_header_ref);
|
|
}
|
|
|
|
static void cbs_av1_free_metadata(FFRefStructOpaque unused, void *content)
|
|
{
|
|
AV1RawOBU *obu = content;
|
|
AV1RawMetadata *md;
|
|
|
|
av_assert0(obu->header.obu_type == AV1_OBU_METADATA);
|
|
md = &obu->obu.metadata;
|
|
|
|
switch (md->metadata_type) {
|
|
case AV1_METADATA_TYPE_HDR_CLL:
|
|
case AV1_METADATA_TYPE_HDR_MDCV:
|
|
case AV1_METADATA_TYPE_SCALABILITY:
|
|
case AV1_METADATA_TYPE_TIMECODE:
|
|
break;
|
|
case AV1_METADATA_TYPE_ITUT_T35:
|
|
av_buffer_unref(&md->metadata.itut_t35.payload_ref);
|
|
break;
|
|
default:
|
|
av_buffer_unref(&md->metadata.unknown.payload_ref);
|
|
}
|
|
}
|
|
|
|
static const CodedBitstreamUnitTypeDescriptor cbs_av1_unit_types[] = {
|
|
CBS_UNIT_TYPE_POD(AV1_OBU_SEQUENCE_HEADER, AV1RawOBU),
|
|
CBS_UNIT_TYPE_POD(AV1_OBU_TEMPORAL_DELIMITER, AV1RawOBU),
|
|
CBS_UNIT_TYPE_POD(AV1_OBU_FRAME_HEADER, AV1RawOBU),
|
|
CBS_UNIT_TYPE_POD(AV1_OBU_REDUNDANT_FRAME_HEADER, AV1RawOBU),
|
|
|
|
CBS_UNIT_TYPE_INTERNAL_REF(AV1_OBU_TILE_GROUP, AV1RawOBU,
|
|
obu.tile_group.tile_data.data),
|
|
CBS_UNIT_TYPE_INTERNAL_REF(AV1_OBU_FRAME, AV1RawOBU,
|
|
obu.frame.tile_group.tile_data.data),
|
|
CBS_UNIT_TYPE_INTERNAL_REF(AV1_OBU_TILE_LIST, AV1RawOBU,
|
|
obu.tile_list.tile_data.data),
|
|
CBS_UNIT_TYPE_INTERNAL_REF(AV1_OBU_PADDING, AV1RawOBU,
|
|
obu.padding.payload),
|
|
|
|
CBS_UNIT_TYPE_COMPLEX(AV1_OBU_METADATA, AV1RawOBU,
|
|
&cbs_av1_free_metadata),
|
|
|
|
CBS_UNIT_TYPE_END_OF_LIST
|
|
};
|
|
|
|
#define OFFSET(x) offsetof(CodedBitstreamAV1Context, x)
|
|
static const AVOption cbs_av1_options[] = {
|
|
{ "operating_point", "Set operating point to select layers to parse from a scalable bitstream",
|
|
OFFSET(operating_point), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AV1_MAX_OPERATING_POINTS - 1, 0 },
|
|
{ "fixed_obu_size_length", "Set fixed length of the obu_size field",
|
|
OFFSET(fixed_obu_size_length), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 8, 0 },
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVClass cbs_av1_class = {
|
|
.class_name = "cbs_av1",
|
|
.item_name = av_default_item_name,
|
|
.option = cbs_av1_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
const CodedBitstreamType ff_cbs_type_av1 = {
|
|
.codec_id = AV_CODEC_ID_AV1,
|
|
|
|
.priv_class = &cbs_av1_class,
|
|
.priv_data_size = sizeof(CodedBitstreamAV1Context),
|
|
|
|
.unit_types = cbs_av1_unit_types,
|
|
|
|
.split_fragment = &cbs_av1_split_fragment,
|
|
.read_unit = &cbs_av1_read_unit,
|
|
.write_unit = &cbs_av1_write_obu,
|
|
.assemble_fragment = &cbs_av1_assemble_fragment,
|
|
|
|
.flush = &cbs_av1_flush,
|
|
.close = &cbs_av1_close,
|
|
};
|