| /* |
| * 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/avassert.h" |
| #include "libavutil/pixfmt.h" |
| |
| #include "cbs.h" |
| #include "cbs_internal.h" |
| #include "cbs_av1.h" |
| #include "internal.h" |
| |
| |
| static int cbs_av1_read_uvlc(CodedBitstreamContext *ctx, GetBitContext *gbc, |
| const char *name, uint32_t *write_to, |
| uint32_t range_min, uint32_t range_max) |
| { |
| uint32_t zeroes, bits_value, value; |
| int position; |
| |
| if (ctx->trace_enable) |
| position = get_bits_count(gbc); |
| |
| zeroes = 0; |
| while (1) { |
| if (get_bits_left(gbc) < 1) { |
| av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid uvlc code at " |
| "%s: bitstream ended.\n", name); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (get_bits1(gbc)) |
| break; |
| ++zeroes; |
| } |
| |
| if (zeroes >= 32) { |
| value = MAX_UINT_BITS(32); |
| } else { |
| if (get_bits_left(gbc) < zeroes) { |
| av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid uvlc code at " |
| "%s: bitstream ended.\n", name); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| bits_value = get_bits_long(gbc, zeroes); |
| value = bits_value + (UINT32_C(1) << zeroes) - 1; |
| } |
| |
| if (ctx->trace_enable) { |
| char bits[65]; |
| int i, j, k; |
| |
| if (zeroes >= 32) { |
| while (zeroes > 32) { |
| k = FFMIN(zeroes - 32, 32); |
| for (i = 0; i < k; i++) |
| bits[i] = '0'; |
| bits[i] = 0; |
| ff_cbs_trace_syntax_element(ctx, position, name, |
| NULL, bits, 0); |
| zeroes -= k; |
| position += k; |
| } |
| } |
| |
| for (i = 0; i < zeroes; i++) |
| bits[i] = '0'; |
| bits[i++] = '1'; |
| |
| if (zeroes < 32) { |
| for (j = 0; j < zeroes; j++) |
| bits[i++] = (bits_value >> (zeroes - j - 1) & 1) ? '1' : '0'; |
| } |
| |
| bits[i] = 0; |
| ff_cbs_trace_syntax_element(ctx, position, name, |
| NULL, bits, value); |
| } |
| |
| 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_av1_write_uvlc(CodedBitstreamContext *ctx, PutBitContext *pbc, |
| const char *name, uint32_t value, |
| uint32_t range_min, uint32_t range_max) |
| { |
| uint32_t v; |
| int position, zeroes; |
| |
| 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; |
| } |
| |
| if (ctx->trace_enable) |
| position = put_bits_count(pbc); |
| |
| zeroes = av_log2(value + 1); |
| v = value - (1U << zeroes) + 1; |
| put_bits(pbc, zeroes, 0); |
| put_bits(pbc, 1, 1); |
| put_bits(pbc, zeroes, v); |
| |
| if (ctx->trace_enable) { |
| char bits[65]; |
| int i, j; |
| i = 0; |
| for (j = 0; j < zeroes; j++) |
| bits[i++] = '0'; |
| bits[i++] = '1'; |
| for (j = 0; j < zeroes; j++) |
| bits[i++] = (v >> (zeroes - j - 1) & 1) ? '1' : '0'; |
| bits[i++] = 0; |
| ff_cbs_trace_syntax_element(ctx, position, name, NULL, |
| bits, value); |
| } |
| |
| return 0; |
| } |
| |
| static int cbs_av1_read_leb128(CodedBitstreamContext *ctx, GetBitContext *gbc, |
| const char *name, uint64_t *write_to) |
| { |
| uint64_t value; |
| int position, err, i; |
| |
| if (ctx->trace_enable) |
| position = get_bits_count(gbc); |
| |
| value = 0; |
| for (i = 0; i < 8; i++) { |
| int subscript[2] = { 1, i }; |
| uint32_t byte; |
| err = ff_cbs_read_unsigned(ctx, gbc, 8, "leb128_byte[i]", subscript, |
| &byte, 0x00, 0xff); |
| if (err < 0) |
| return err; |
| |
| value |= (uint64_t)(byte & 0x7f) << (i * 7); |
| if (!(byte & 0x80)) |
| break; |
| } |
| |
| if (value > UINT32_MAX) |
| return AVERROR_INVALIDDATA; |
| |
| if (ctx->trace_enable) |
| ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value); |
| |
| *write_to = value; |
| return 0; |
| } |
| |
| static int cbs_av1_write_leb128(CodedBitstreamContext *ctx, PutBitContext *pbc, |
| const char *name, uint64_t value) |
| { |
| int position, err, len, i; |
| uint8_t byte; |
| |
| len = (av_log2(value) + 7) / 7; |
| |
| if (ctx->trace_enable) |
| position = put_bits_count(pbc); |
| |
| for (i = 0; i < len; i++) { |
| int subscript[2] = { 1, i }; |
| |
| byte = value >> (7 * i) & 0x7f; |
| if (i < len - 1) |
| byte |= 0x80; |
| |
| err = ff_cbs_write_unsigned(ctx, pbc, 8, "leb128_byte[i]", subscript, |
| byte, 0x00, 0xff); |
| if (err < 0) |
| return err; |
| } |
| |
| if (ctx->trace_enable) |
| ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value); |
| |
| return 0; |
| } |
| |
| static int cbs_av1_read_ns(CodedBitstreamContext *ctx, GetBitContext *gbc, |
| uint32_t n, const char *name, |
| const int *subscripts, uint32_t *write_to) |
| { |
| uint32_t m, v, extra_bit, value; |
| int position, w; |
| |
| av_assert0(n > 0); |
| |
| if (ctx->trace_enable) |
| position = get_bits_count(gbc); |
| |
| w = av_log2(n) + 1; |
| m = (1 << w) - n; |
| |
| if (get_bits_left(gbc) < w) { |
| av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid non-symmetric value at " |
| "%s: bitstream ended.\n", name); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (w - 1 > 0) |
| v = get_bits(gbc, w - 1); |
| else |
| v = 0; |
| |
| if (v < m) { |
| value = v; |
| } else { |
| extra_bit = get_bits1(gbc); |
| value = (v << 1) - m + extra_bit; |
| } |
| |
| if (ctx->trace_enable) { |
| char bits[33]; |
| int i; |
| for (i = 0; i < w - 1; i++) |
| bits[i] = (v >> i & 1) ? '1' : '0'; |
| if (v >= m) |
| bits[i++] = extra_bit ? '1' : '0'; |
| bits[i] = 0; |
| |
| ff_cbs_trace_syntax_element(ctx, position, |
| name, subscripts, bits, value); |
| } |
| |
| *write_to = value; |
| return 0; |
| } |
| |
| static int cbs_av1_write_ns(CodedBitstreamContext *ctx, PutBitContext *pbc, |
| uint32_t n, const char *name, |
| const int *subscripts, uint32_t value) |
| { |
| uint32_t w, m, v, extra_bit; |
| int position; |
| |
| if (value > n) { |
| av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: " |
| "%"PRIu32", but must be in [0,%"PRIu32"].\n", |
| name, value, n); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (ctx->trace_enable) |
| position = put_bits_count(pbc); |
| |
| w = av_log2(n) + 1; |
| m = (1 << w) - n; |
| |
| if (put_bits_left(pbc) < w) |
| return AVERROR(ENOSPC); |
| |
| if (value < m) { |
| v = value; |
| put_bits(pbc, w - 1, v); |
| } else { |
| v = m + ((value - m) >> 1); |
| extra_bit = (value - m) & 1; |
| put_bits(pbc, w - 1, v); |
| put_bits(pbc, 1, extra_bit); |
| } |
| |
| if (ctx->trace_enable) { |
| char bits[33]; |
| int i; |
| for (i = 0; i < w - 1; i++) |
| bits[i] = (v >> i & 1) ? '1' : '0'; |
| if (value >= m) |
| bits[i++] = extra_bit ? '1' : '0'; |
| bits[i] = 0; |
| |
| ff_cbs_trace_syntax_element(ctx, position, |
| name, subscripts, bits, value); |
| } |
| |
| return 0; |
| } |
| |
| static int cbs_av1_read_increment(CodedBitstreamContext *ctx, GetBitContext *gbc, |
| uint32_t range_min, uint32_t range_max, |
| const char *name, uint32_t *write_to) |
| { |
| uint32_t value; |
| int position, i; |
| char bits[33]; |
| |
| av_assert0(range_min <= range_max && range_max - range_min < sizeof(bits) - 1); |
| if (ctx->trace_enable) |
| position = get_bits_count(gbc); |
| |
| for (i = 0, value = range_min; value < range_max;) { |
| if (get_bits_left(gbc) < 1) { |
| av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid increment value at " |
| "%s: bitstream ended.\n", name); |
| return AVERROR_INVALIDDATA; |
| } |
| if (get_bits1(gbc)) { |
| bits[i++] = '1'; |
| ++value; |
| } else { |
| bits[i++] = '0'; |
| break; |
| } |
| } |
| |
| if (ctx->trace_enable) { |
| bits[i] = 0; |
| ff_cbs_trace_syntax_element(ctx, position, |
| name, NULL, bits, value); |
| } |
| |
| *write_to = value; |
| return 0; |
| } |
| |
| static int cbs_av1_write_increment(CodedBitstreamContext *ctx, PutBitContext *pbc, |
| uint32_t range_min, uint32_t range_max, |
| const char *name, uint32_t value) |
| { |
| int len; |
| |
| av_assert0(range_min <= range_max && range_max - range_min < 32); |
| 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; |
| } |
| |
| if (value == range_max) |
| len = range_max - range_min; |
| else |
| len = value - range_min + 1; |
| if (put_bits_left(pbc) < len) |
| return AVERROR(ENOSPC); |
| |
| if (ctx->trace_enable) { |
| char bits[33]; |
| int i; |
| for (i = 0; i < len; i++) { |
| if (range_min + i == value) |
| bits[i] = '0'; |
| else |
| bits[i] = '1'; |
| } |
| bits[i] = 0; |
| ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc), |
| name, NULL, bits, value); |
| } |
| |
| if (len > 0) |
| put_bits(pbc, len, (1 << len) - 1 - (value != range_max)); |
| |
| return 0; |
| } |
| |
| static int cbs_av1_read_subexp(CodedBitstreamContext *ctx, GetBitContext *gbc, |
| uint32_t range_max, const char *name, |
| const int *subscripts, uint32_t *write_to) |
| { |
| uint32_t value; |
| int position, err; |
| uint32_t max_len, len, range_offset, range_bits; |
| |
| if (ctx->trace_enable) |
| position = get_bits_count(gbc); |
| |
| av_assert0(range_max > 0); |
| max_len = av_log2(range_max - 1) - 3; |
| |
| err = cbs_av1_read_increment(ctx, gbc, 0, max_len, |
| "subexp_more_bits", &len); |
| if (err < 0) |
| return err; |
| |
| if (len) { |
| range_bits = 2 + len; |
| range_offset = 1 << range_bits; |
| } else { |
| range_bits = 3; |
| range_offset = 0; |
| } |
| |
| if (len < max_len) { |
| err = ff_cbs_read_unsigned(ctx, gbc, range_bits, |
| "subexp_bits", NULL, &value, |
| 0, MAX_UINT_BITS(range_bits)); |
| if (err < 0) |
| return err; |
| |
| } else { |
| err = cbs_av1_read_ns(ctx, gbc, range_max - range_offset, |
| "subexp_final_bits", NULL, &value); |
| if (err < 0) |
| return err; |
| } |
| value += range_offset; |
| |
| if (ctx->trace_enable) |
| ff_cbs_trace_syntax_element(ctx, position, |
| name, subscripts, "", value); |
| |
| *write_to = value; |
| return err; |
| } |
| |
| static int cbs_av1_write_subexp(CodedBitstreamContext *ctx, PutBitContext *pbc, |
| uint32_t range_max, const char *name, |
| const int *subscripts, uint32_t value) |
| { |
| int position, err; |
| uint32_t max_len, len, range_offset, range_bits; |
| |
| if (value > range_max) { |
| av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: " |
| "%"PRIu32", but must be in [0,%"PRIu32"].\n", |
| name, value, range_max); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (ctx->trace_enable) |
| position = put_bits_count(pbc); |
| |
| av_assert0(range_max > 0); |
| max_len = av_log2(range_max - 1) - 3; |
| |
| if (value < 8) { |
| range_bits = 3; |
| range_offset = 0; |
| len = 0; |
| } else { |
| range_bits = av_log2(value); |
| len = range_bits - 2; |
| if (len > max_len) { |
| // The top bin is combined with the one below it. |
| av_assert0(len == max_len + 1); |
| --range_bits; |
| len = max_len; |
| } |
| range_offset = 1 << range_bits; |
| } |
| |
| err = cbs_av1_write_increment(ctx, pbc, 0, max_len, |
| "subexp_more_bits", len); |
| if (err < 0) |
| return err; |
| |
| if (len < max_len) { |
| err = ff_cbs_write_unsigned(ctx, pbc, range_bits, |
| "subexp_bits", NULL, |
| value - range_offset, |
| 0, MAX_UINT_BITS(range_bits)); |
| if (err < 0) |
| return err; |
| |
| } else { |
| err = cbs_av1_write_ns(ctx, pbc, range_max - range_offset, |
| "subexp_final_bits", NULL, |
| value - range_offset); |
| if (err < 0) |
| return err; |
| } |
| |
| if (ctx->trace_enable) |
| ff_cbs_trace_syntax_element(ctx, position, |
| name, subscripts, "", value); |
| |
| return err; |
| } |
| |
| |
| static int cbs_av1_tile_log2(int blksize, int target) |
| { |
| int k; |
| for (k = 0; (blksize << k) < target; k++); |
| return k; |
| } |
| |
| static int cbs_av1_get_relative_dist(const AV1RawSequenceHeader *seq, |
| unsigned int a, unsigned int b) |
| { |
| unsigned int diff, m; |
| if (!seq->enable_order_hint) |
| return 0; |
| diff = a - b; |
| m = 1 << seq->order_hint_bits_minus_1; |
| diff = (diff & (m - 1)) - (diff & m); |
| return diff; |
| } |
| |
| static size_t cbs_av1_get_payload_bytes_left(GetBitContext *gbc) |
| { |
| GetBitContext tmp = *gbc; |
| size_t size = 0; |
| for (int i = 0; get_bits_left(&tmp) >= 8; i++) { |
| if (get_bits(&tmp, 8)) |
| size = i; |
| } |
| return size; |
| } |
| |
| |
| #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_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name |
| #define FUNC_AV1(rw, name) FUNC_NAME(rw, av1, name) |
| #define FUNC(name) FUNC_AV1(READWRITE, name) |
| |
| #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL) |
| |
| #define fb(width, name) \ |
| xf(width, name, current->name, 0, MAX_UINT_BITS(width), 0, ) |
| #define fc(width, name, range_min, range_max) \ |
| xf(width, name, current->name, range_min, range_max, 0, ) |
| #define flag(name) fb(1, name) |
| #define su(width, name) \ |
| xsu(width, name, current->name, 0, ) |
| |
| #define fbs(width, name, subs, ...) \ |
| xf(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__) |
| #define fcs(width, name, range_min, range_max, subs, ...) \ |
| xf(width, name, current->name, range_min, range_max, subs, __VA_ARGS__) |
| #define flags(name, subs, ...) \ |
| xf(1, name, current->name, 0, 1, subs, __VA_ARGS__) |
| #define sus(width, name, subs, ...) \ |
| xsu(width, name, current->name, subs, __VA_ARGS__) |
| |
| #define fixed(width, name, value) do { \ |
| av_unused uint32_t fixed_value = value; \ |
| xf(width, name, fixed_value, value, value, 0, ); \ |
| } while (0) |
| |
| |
| #define READ |
| #define READWRITE read |
| #define RWContext GetBitContext |
| |
| #define xf(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 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 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 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)); \ |
| } 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 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_insert_unit_data(frag, -1, 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_content2(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) { |
| // Decoding will drop this OBU at this operating point. |
| } |
| } |
| } |
| |
| 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; |
| |
| av_buffer_unref(&priv->sequence_header_ref); |
| priv->sequence_header = NULL; |
| |
| priv->sequence_header_ref = av_buffer_ref(unit->content_ref); |
| if (!priv->sequence_header_ref) |
| return AVERROR(ENOMEM); |
| 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; |
| |
| // 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; |
| |
| err = cbs_av1_write_obu_header(ctx, pbc, &obu->header); |
| if (err < 0) |
| return err; |
| |
| if (obu->header.obu_has_size_field) { |
| pbc_tmp = *pbc; |
| // 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) |
| return err; |
| |
| av_buffer_unref(&priv->sequence_header_ref); |
| priv->sequence_header = NULL; |
| |
| err = ff_cbs_make_unit_refcounted(ctx, unit); |
| if (err < 0) |
| return err; |
| |
| priv->sequence_header_ref = av_buffer_ref(unit->content_ref); |
| if (!priv->sequence_header_ref) |
| return AVERROR(ENOMEM); |
| 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) |
| return err; |
| } |
| 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) |
| return err; |
| } |
| break; |
| case AV1_OBU_TILE_GROUP: |
| { |
| err = cbs_av1_write_tile_group_obu(ctx, pbc, |
| &obu->obu.tile_group); |
| if (err < 0) |
| return err; |
| |
| 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) |
| return err; |
| |
| 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) |
| return err; |
| |
| 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) |
| return err; |
| } |
| break; |
| case AV1_OBU_PADDING: |
| { |
| err = cbs_av1_write_padding_obu(ctx, pbc, &obu->obu.padding); |
| if (err < 0) |
| return err; |
| } |
| break; |
| default: |
| return AVERROR(ENOSYS); |
| } |
| |
| 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) |
| return err; |
| 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); |
| if (err < 0) |
| return err; |
| |
| 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)) |
| return AVERROR(ENOSPC); |
| |
| if (obu->obu_size > 0) { |
| memmove(pbc->buf + data_pos, |
| pbc->buf + start_pos, header_size); |
| 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); |
| |
| return 0; |
| } |
| |
| 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; |
| |
| av_buffer_unref(&priv->sequence_header_ref); |
| av_buffer_unref(&priv->frame_header_ref); |
| } |
| |
| static void cbs_av1_free_metadata(void *unit, uint8_t *content) |
| { |
| AV1RawOBU *obu = (AV1RawOBU*)content; |
| AV1RawMetadata *md; |
| |
| av_assert0(obu->header.obu_type == AV1_OBU_METADATA); |
| md = &obu->obu.metadata; |
| |
| switch (md->metadata_type) { |
| case AV1_METADATA_TYPE_ITUT_T35: |
| av_buffer_unref(&md->metadata.itut_t35.payload_ref); |
| break; |
| } |
| av_free(content); |
| } |
| |
| 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 |
| }; |
| |
| const CodedBitstreamType ff_cbs_type_av1 = { |
| .codec_id = AV_CODEC_ID_AV1, |
| |
| .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, |
| }; |
