2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "libavutil/attributes.h"
20 #include "libavutil/avassert.h"
22 #include "bytestream.h"
24 #include "cbs_internal.h"
29 #include "h2645_parse.h"
34 static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
35 const char *name, const int *subscripts,
37 uint32_t range_min, uint32_t range_max)
44 position = get_bits_count(gbc);
46 for (i = 0; i < 32; i++) {
47 if (get_bits_left(gbc) < i + 1) {
48 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
49 "%s: bitstream ended.\n", name);
50 return AVERROR_INVALIDDATA;
53 bits[i] = k ? '1' : '0';
58 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
59 "%s: more than 31 zeroes.\n", name);
60 return AVERROR_INVALIDDATA;
63 for (j = 0; j < i; j++) {
65 bits[i + j + 1] = k ? '1' : '0';
66 value = value << 1 | k;
71 if (ctx->trace_enable)
72 ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
75 if (value < range_min || value > range_max) {
76 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
77 "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
78 name, value, range_min, range_max);
79 return AVERROR_INVALIDDATA;
86 static int cbs_read_se_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
87 const char *name, const int *subscripts,
89 int32_t range_min, int32_t range_max)
97 position = get_bits_count(gbc);
99 for (i = 0; i < 32; i++) {
100 if (get_bits_left(gbc) < i + 1) {
101 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
102 "%s: bitstream ended.\n", name);
103 return AVERROR_INVALIDDATA;
106 bits[i] = k ? '1' : '0';
111 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
112 "%s: more than 31 zeroes.\n", name);
113 return AVERROR_INVALIDDATA;
116 for (j = 0; j < i; j++) {
118 bits[i + j + 1] = k ? '1' : '0';
123 value = -(int32_t)(v / 2);
127 if (ctx->trace_enable)
128 ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
131 if (value < range_min || value > range_max) {
132 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
133 "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
134 name, value, range_min, range_max);
135 return AVERROR_INVALIDDATA;
142 static int cbs_write_ue_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
143 const char *name, const int *subscripts,
145 uint32_t range_min, uint32_t range_max)
149 if (value < range_min || value > range_max) {
150 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
151 "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
152 name, value, range_min, range_max);
153 return AVERROR_INVALIDDATA;
155 av_assert0(value != UINT32_MAX);
157 len = av_log2(value + 1);
158 if (put_bits_left(pbc) < 2 * len + 1)
159 return AVERROR(ENOSPC);
161 if (ctx->trace_enable) {
165 for (i = 0; i < len; i++)
168 for (i = 0; i < len; i++)
169 bits[len + i + 1] = (value + 1) >> (len - i - 1) & 1 ? '1' : '0';
170 bits[len + len + 1] = 0;
172 ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
173 name, subscripts, bits, value);
176 put_bits(pbc, len, 0);
178 put_bits(pbc, len + 1, value + 1);
180 put_bits32(pbc, value + 1);
185 static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
186 const char *name, const int *subscripts,
188 int32_t range_min, int32_t range_max)
193 if (value < range_min || value > range_max) {
194 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
195 "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
196 name, value, range_min, range_max);
197 return AVERROR_INVALIDDATA;
199 av_assert0(value != INT32_MIN);
204 uvalue = 2 * (uint32_t)value - 1;
206 uvalue = 2 * (uint32_t)-value;
208 len = av_log2(uvalue + 1);
209 if (put_bits_left(pbc) < 2 * len + 1)
210 return AVERROR(ENOSPC);
212 if (ctx->trace_enable) {
216 for (i = 0; i < len; i++)
219 for (i = 0; i < len; i++)
220 bits[len + i + 1] = (uvalue + 1) >> (len - i - 1) & 1 ? '1' : '0';
221 bits[len + len + 1] = 0;
223 ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
224 name, subscripts, bits, value);
227 put_bits(pbc, len, 0);
229 put_bits(pbc, len + 1, uvalue + 1);
231 put_bits32(pbc, uvalue + 1);
236 // payload_extension_present() - true if we are before the last 1-bit
237 // in the payload structure, which must be in the last byte.
238 static int cbs_h265_payload_extension_present(GetBitContext *gbc, uint32_t payload_size,
241 int bits_left = payload_size * 8 - cur_pos;
242 return (bits_left > 0 &&
243 (bits_left > 7 || show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1)));
246 #define HEADER(name) do { \
247 ff_cbs_trace_header(ctx, name); \
250 #define CHECK(call) do { \
256 #define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
257 #define FUNC_H264(rw, name) FUNC_NAME(rw, h264, name)
258 #define FUNC_H265(rw, name) FUNC_NAME(rw, h265, name)
260 #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
262 #define u(width, name, range_min, range_max) \
263 xu(width, name, current->name, range_min, range_max, 0, )
264 #define ub(width, name) \
265 xu(width, name, current->name, 0, MAX_UINT_BITS(width), 0, )
266 #define flag(name) ub(1, name)
267 #define ue(name, range_min, range_max) \
268 xue(name, current->name, range_min, range_max, 0, )
269 #define i(width, name, range_min, range_max) \
270 xi(width, name, current->name, range_min, range_max, 0, )
271 #define ib(width, name) \
272 xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), 0, )
273 #define se(name, range_min, range_max) \
274 xse(name, current->name, range_min, range_max, 0, )
276 #define us(width, name, range_min, range_max, subs, ...) \
277 xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
278 #define ubs(width, name, subs, ...) \
279 xu(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__)
280 #define flags(name, subs, ...) \
281 xu(1, name, current->name, 0, 1, subs, __VA_ARGS__)
282 #define ues(name, range_min, range_max, subs, ...) \
283 xue(name, current->name, range_min, range_max, subs, __VA_ARGS__)
284 #define is(width, name, range_min, range_max, subs, ...) \
285 xi(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
286 #define ibs(width, name, subs, ...) \
287 xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), subs, __VA_ARGS__)
288 #define ses(name, range_min, range_max, subs, ...) \
289 xse(name, current->name, range_min, range_max, subs, __VA_ARGS__)
291 #define fixed(width, name, value) do { \
292 av_unused uint32_t fixed_value = value; \
293 xu(width, name, fixed_value, value, value, 0, ); \
298 #define READWRITE read
299 #define RWContext GetBitContext
301 #define xu(width, name, var, range_min, range_max, subs, ...) do { \
303 CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
304 SUBSCRIPTS(subs, __VA_ARGS__), \
305 &value, range_min, range_max)); \
308 #define xue(name, var, range_min, range_max, subs, ...) do { \
310 CHECK(cbs_read_ue_golomb(ctx, rw, #name, \
311 SUBSCRIPTS(subs, __VA_ARGS__), \
312 &value, range_min, range_max)); \
315 #define xi(width, name, var, range_min, range_max, subs, ...) do { \
317 CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \
318 SUBSCRIPTS(subs, __VA_ARGS__), \
319 &value, range_min, range_max)); \
322 #define xse(name, var, range_min, range_max, subs, ...) do { \
324 CHECK(cbs_read_se_golomb(ctx, rw, #name, \
325 SUBSCRIPTS(subs, __VA_ARGS__), \
326 &value, range_min, range_max)); \
331 #define infer(name, value) do { \
332 current->name = value; \
335 static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
337 int bits_left = get_bits_left(gbc);
342 if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1))
347 #define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw))
349 #define byte_alignment(rw) (get_bits_count(rw) % 8)
351 #define allocate(name, size) do { \
352 name ## _ref = av_buffer_allocz(size + \
353 AV_INPUT_BUFFER_PADDING_SIZE); \
355 return AVERROR(ENOMEM); \
356 name = name ## _ref->data; \
359 #define FUNC(name) FUNC_H264(READWRITE, name)
360 #include "cbs_h264_syntax_template.c"
363 #define FUNC(name) FUNC_H265(READWRITE, name)
364 #include "cbs_h265_syntax_template.c"
375 #undef more_rbsp_data
376 #undef byte_alignment
381 #define READWRITE write
382 #define RWContext PutBitContext
384 #define xu(width, name, var, range_min, range_max, subs, ...) do { \
385 uint32_t value = var; \
386 CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
387 SUBSCRIPTS(subs, __VA_ARGS__), \
388 value, range_min, range_max)); \
390 #define xue(name, var, range_min, range_max, subs, ...) do { \
391 uint32_t value = var; \
392 CHECK(cbs_write_ue_golomb(ctx, rw, #name, \
393 SUBSCRIPTS(subs, __VA_ARGS__), \
394 value, range_min, range_max)); \
396 #define xi(width, name, var, range_min, range_max, subs, ...) do { \
397 int32_t value = var; \
398 CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \
399 SUBSCRIPTS(subs, __VA_ARGS__), \
400 value, range_min, range_max)); \
402 #define xse(name, var, range_min, range_max, subs, ...) do { \
403 int32_t value = var; \
404 CHECK(cbs_write_se_golomb(ctx, rw, #name, \
405 SUBSCRIPTS(subs, __VA_ARGS__), \
406 value, range_min, range_max)); \
409 #define infer(name, value) do { \
410 if (current->name != (value)) { \
411 av_log(ctx->log_ctx, AV_LOG_ERROR, \
412 "%s does not match inferred value: " \
413 "%"PRId64", but should be %"PRId64".\n", \
414 #name, (int64_t)current->name, (int64_t)(value)); \
415 return AVERROR_INVALIDDATA; \
419 #define more_rbsp_data(var) (var)
421 #define byte_alignment(rw) (put_bits_count(rw) % 8)
423 #define allocate(name, size) do { \
425 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \
426 "for writing.\n", #name); \
427 return AVERROR_INVALIDDATA; \
431 #define FUNC(name) FUNC_H264(READWRITE, name)
432 #include "cbs_h264_syntax_template.c"
435 #define FUNC(name) FUNC_H265(READWRITE, name)
436 #include "cbs_h265_syntax_template.c"
452 #undef more_rbsp_data
453 #undef byte_alignment
457 static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
458 CodedBitstreamFragment *frag,
459 const H2645Packet *packet)
463 for (i = 0; i < packet->nb_nals; i++) {
464 const H2645NAL *nal = &packet->nals[i];
466 size_t size = nal->size;
468 if (nal->nuh_layer_id > 0)
471 // Remove trailing zeroes.
472 while (size > 0 && nal->data[size - 1] == 0)
475 av_log(ctx->log_ctx, AV_LOG_VERBOSE, "Discarding empty 0 NAL unit\n");
479 ref = (nal->data == nal->raw_data) ? frag->data_ref
480 : packet->rbsp.rbsp_buffer_ref;
482 err = ff_cbs_insert_unit_data(frag, -1, nal->type,
483 (uint8_t*)nal->data, size, ref);
491 static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
492 CodedBitstreamFragment *frag,
495 enum AVCodecID codec_id = ctx->codec->codec_id;
496 CodedBitstreamH2645Context *priv = ctx->priv_data;
500 av_assert0(frag->data && frag->nb_units == 0);
501 if (frag->data_size == 0)
504 if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
506 size_t size, start, end;
507 int i, count, version;
511 bytestream2_init(&gbc, frag->data, frag->data_size);
513 if (bytestream2_get_bytes_left(&gbc) < 6)
514 return AVERROR_INVALIDDATA;
516 version = bytestream2_get_byte(&gbc);
518 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
519 "first byte %u.\n", version);
520 return AVERROR_INVALIDDATA;
523 bytestream2_skip(&gbc, 3);
524 priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
527 count = bytestream2_get_byte(&gbc) & 0x1f;
528 start = bytestream2_tell(&gbc);
529 for (i = 0; i < count; i++) {
530 if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
531 return AVERROR_INVALIDDATA;
532 size = bytestream2_get_be16(&gbc);
533 if (bytestream2_get_bytes_left(&gbc) < size)
534 return AVERROR_INVALIDDATA;
535 bytestream2_skip(&gbc, size);
537 end = bytestream2_tell(&gbc);
539 err = ff_h2645_packet_split(&priv->read_packet,
540 frag->data + start, end - start,
541 ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
543 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
546 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
551 count = bytestream2_get_byte(&gbc);
552 start = bytestream2_tell(&gbc);
553 for (i = 0; i < count; i++) {
554 if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
555 return AVERROR_INVALIDDATA;
556 size = bytestream2_get_be16(&gbc);
557 if (bytestream2_get_bytes_left(&gbc) < size)
558 return AVERROR_INVALIDDATA;
559 bytestream2_skip(&gbc, size);
561 end = bytestream2_tell(&gbc);
563 err = ff_h2645_packet_split(&priv->read_packet,
564 frag->data + start, end - start,
565 ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
567 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
570 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
574 if (bytestream2_get_bytes_left(&gbc) > 0) {
575 av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
576 "header.\n", bytestream2_get_bytes_left(&gbc));
579 } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
581 size_t size, start, end;
582 int i, j, nb_arrays, nal_unit_type, nb_nals, version;
586 bytestream2_init(&gbc, frag->data, frag->data_size);
588 if (bytestream2_get_bytes_left(&gbc) < 23)
589 return AVERROR_INVALIDDATA;
591 version = bytestream2_get_byte(&gbc);
593 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
594 "first byte %u.\n", version);
595 return AVERROR_INVALIDDATA;
598 bytestream2_skip(&gbc, 20);
599 priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
601 nb_arrays = bytestream2_get_byte(&gbc);
602 for (i = 0; i < nb_arrays; i++) {
603 nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
604 nb_nals = bytestream2_get_be16(&gbc);
606 start = bytestream2_tell(&gbc);
607 for (j = 0; j < nb_nals; j++) {
608 if (bytestream2_get_bytes_left(&gbc) < 2)
609 return AVERROR_INVALIDDATA;
610 size = bytestream2_get_be16(&gbc);
611 if (bytestream2_get_bytes_left(&gbc) < size)
612 return AVERROR_INVALIDDATA;
613 bytestream2_skip(&gbc, size);
615 end = bytestream2_tell(&gbc);
617 err = ff_h2645_packet_split(&priv->read_packet,
618 frag->data + start, end - start,
619 ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
621 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
622 "HVCC array %d (%d NAL units of type %d).\n",
623 i, nb_nals, nal_unit_type);
626 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
632 // Annex B, or later MP4 with already-known parameters.
634 err = ff_h2645_packet_split(&priv->read_packet,
635 frag->data, frag->data_size,
637 priv->mp4, priv->nal_length_size,
642 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
650 #define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
651 static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
652 CodedBitstreamUnit *unit) \
654 CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
655 H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
656 unsigned int id = ps_var->id_element; \
658 if (id >= FF_ARRAY_ELEMS(priv->ps_var)) { \
659 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
660 " id : %d.\n", id); \
661 return AVERROR_INVALIDDATA; \
663 err = ff_cbs_make_unit_refcounted(ctx, unit); \
666 if (priv->ps_var[id] == priv->active_ ## ps_var) \
667 priv->active_ ## ps_var = NULL ; \
668 av_buffer_unref(&priv->ps_var ## _ref[id]); \
669 av_assert0(unit->content_ref); \
670 priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
671 if (!priv->ps_var ## _ref[id]) \
672 return AVERROR(ENOMEM); \
673 priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
674 if (!unit->content_ref) \
675 memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
679 cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
680 cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
681 cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
682 cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
683 cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
685 static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
686 CodedBitstreamUnit *unit)
691 err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
695 err = ff_cbs_alloc_unit_content2(ctx, unit);
699 switch (unit->type) {
702 H264RawSPS *sps = unit->content;
704 err = cbs_h264_read_sps(ctx, &gbc, sps);
708 err = cbs_h264_replace_sps(ctx, unit);
714 case H264_NAL_SPS_EXT:
716 err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
724 H264RawPPS *pps = unit->content;
726 err = cbs_h264_read_pps(ctx, &gbc, pps);
730 err = cbs_h264_replace_pps(ctx, unit);
737 case H264_NAL_IDR_SLICE:
738 case H264_NAL_AUXILIARY_SLICE:
740 H264RawSlice *slice = unit->content;
743 err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
747 if (!cbs_h2645_read_more_rbsp_data(&gbc))
748 return AVERROR_INVALIDDATA;
750 pos = get_bits_count(&gbc);
751 len = unit->data_size;
753 slice->data_size = len - pos / 8;
754 slice->data_ref = av_buffer_ref(unit->data_ref);
755 if (!slice->data_ref)
756 return AVERROR(ENOMEM);
757 slice->data = unit->data + pos / 8;
758 slice->data_bit_start = pos % 8;
764 err = cbs_h264_read_aud(ctx, &gbc, unit->content);
772 err = cbs_h264_read_sei(ctx, &gbc, unit->content);
778 case H264_NAL_FILLER_DATA:
780 err = cbs_h264_read_filler(ctx, &gbc, unit->content);
786 case H264_NAL_END_SEQUENCE:
787 case H264_NAL_END_STREAM:
789 err = (unit->type == H264_NAL_END_SEQUENCE ?
790 cbs_h264_read_end_of_sequence :
791 cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
798 return AVERROR(ENOSYS);
804 static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
805 CodedBitstreamUnit *unit)
810 err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
814 err = ff_cbs_alloc_unit_content2(ctx, unit);
818 switch (unit->type) {
821 H265RawVPS *vps = unit->content;
823 err = cbs_h265_read_vps(ctx, &gbc, vps);
827 err = cbs_h265_replace_vps(ctx, unit);
834 H265RawSPS *sps = unit->content;
836 err = cbs_h265_read_sps(ctx, &gbc, sps);
840 err = cbs_h265_replace_sps(ctx, unit);
848 H265RawPPS *pps = unit->content;
850 err = cbs_h265_read_pps(ctx, &gbc, pps);
854 err = cbs_h265_replace_pps(ctx, unit);
860 case HEVC_NAL_TRAIL_N:
861 case HEVC_NAL_TRAIL_R:
864 case HEVC_NAL_STSA_N:
865 case HEVC_NAL_STSA_R:
866 case HEVC_NAL_RADL_N:
867 case HEVC_NAL_RADL_R:
868 case HEVC_NAL_RASL_N:
869 case HEVC_NAL_RASL_R:
870 case HEVC_NAL_BLA_W_LP:
871 case HEVC_NAL_BLA_W_RADL:
872 case HEVC_NAL_BLA_N_LP:
873 case HEVC_NAL_IDR_W_RADL:
874 case HEVC_NAL_IDR_N_LP:
875 case HEVC_NAL_CRA_NUT:
877 H265RawSlice *slice = unit->content;
880 err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
884 if (!cbs_h2645_read_more_rbsp_data(&gbc))
885 return AVERROR_INVALIDDATA;
887 pos = get_bits_count(&gbc);
888 len = unit->data_size;
890 slice->data_size = len - pos / 8;
891 slice->data_ref = av_buffer_ref(unit->data_ref);
892 if (!slice->data_ref)
893 return AVERROR(ENOMEM);
894 slice->data = unit->data + pos / 8;
895 slice->data_bit_start = pos % 8;
901 err = cbs_h265_read_aud(ctx, &gbc, unit->content);
907 case HEVC_NAL_SEI_PREFIX:
908 case HEVC_NAL_SEI_SUFFIX:
910 err = cbs_h265_read_sei(ctx, &gbc, unit->content,
911 unit->type == HEVC_NAL_SEI_PREFIX);
919 return AVERROR(ENOSYS);
925 static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
926 PutBitContext *pbc, const uint8_t *data,
927 size_t data_size, int data_bit_start)
929 size_t rest = data_size - (data_bit_start + 7) / 8;
930 const uint8_t *pos = data + data_bit_start / 8;
932 av_assert0(data_bit_start >= 0 &&
933 data_size > data_bit_start / 8);
935 if (data_size * 8 + 8 > put_bits_left(pbc))
936 return AVERROR(ENOSPC);
939 goto rbsp_stop_one_bit;
941 // First copy the remaining bits of the first byte
942 // The above check ensures that we do not accidentally
943 // copy beyond the rbsp_stop_one_bit.
944 if (data_bit_start % 8)
945 put_bits(pbc, 8 - data_bit_start % 8,
946 *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
948 if (put_bits_count(pbc) % 8 == 0) {
949 // If the writer is aligned at this point,
950 // memcpy can be used to improve performance.
951 // This happens normally for CABAC.
953 memcpy(put_bits_ptr(pbc), pos, rest);
954 skip_put_bytes(pbc, rest);
956 // If not, we have to copy manually.
957 // rbsp_stop_one_bit forces us to special-case
962 for (; rest > 4; rest -= 4, pos += 4)
963 put_bits32(pbc, AV_RB32(pos));
965 for (; rest > 1; rest--, pos++)
966 put_bits(pbc, 8, *pos);
969 temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
974 i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
975 put_bits(pbc, i, temp);
976 if (put_bits_count(pbc) % 8)
977 put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
983 static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
984 CodedBitstreamUnit *unit,
989 switch (unit->type) {
992 H264RawSPS *sps = unit->content;
994 err = cbs_h264_write_sps(ctx, pbc, sps);
998 err = cbs_h264_replace_sps(ctx, unit);
1004 case H264_NAL_SPS_EXT:
1006 H264RawSPSExtension *sps_ext = unit->content;
1008 err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
1016 H264RawPPS *pps = unit->content;
1018 err = cbs_h264_write_pps(ctx, pbc, pps);
1022 err = cbs_h264_replace_pps(ctx, unit);
1028 case H264_NAL_SLICE:
1029 case H264_NAL_IDR_SLICE:
1030 case H264_NAL_AUXILIARY_SLICE:
1032 H264RawSlice *slice = unit->content;
1034 err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
1039 err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1041 slice->data_bit_start);
1045 // No slice data - that was just the header.
1046 // (Bitstream may be unaligned!)
1053 err = cbs_h264_write_aud(ctx, pbc, unit->content);
1061 err = cbs_h264_write_sei(ctx, pbc, unit->content);
1067 case H264_NAL_FILLER_DATA:
1069 err = cbs_h264_write_filler(ctx, pbc, unit->content);
1075 case H264_NAL_END_SEQUENCE:
1077 err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
1083 case H264_NAL_END_STREAM:
1085 err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
1092 av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1093 "NAL unit type %"PRIu32".\n", unit->type);
1094 return AVERROR_PATCHWELCOME;
1100 static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
1101 CodedBitstreamUnit *unit,
1106 switch (unit->type) {
1109 H265RawVPS *vps = unit->content;
1111 err = cbs_h265_write_vps(ctx, pbc, vps);
1115 err = cbs_h265_replace_vps(ctx, unit);
1123 H265RawSPS *sps = unit->content;
1125 err = cbs_h265_write_sps(ctx, pbc, sps);
1129 err = cbs_h265_replace_sps(ctx, unit);
1137 H265RawPPS *pps = unit->content;
1139 err = cbs_h265_write_pps(ctx, pbc, pps);
1143 err = cbs_h265_replace_pps(ctx, unit);
1149 case HEVC_NAL_TRAIL_N:
1150 case HEVC_NAL_TRAIL_R:
1151 case HEVC_NAL_TSA_N:
1152 case HEVC_NAL_TSA_R:
1153 case HEVC_NAL_STSA_N:
1154 case HEVC_NAL_STSA_R:
1155 case HEVC_NAL_RADL_N:
1156 case HEVC_NAL_RADL_R:
1157 case HEVC_NAL_RASL_N:
1158 case HEVC_NAL_RASL_R:
1159 case HEVC_NAL_BLA_W_LP:
1160 case HEVC_NAL_BLA_W_RADL:
1161 case HEVC_NAL_BLA_N_LP:
1162 case HEVC_NAL_IDR_W_RADL:
1163 case HEVC_NAL_IDR_N_LP:
1164 case HEVC_NAL_CRA_NUT:
1166 H265RawSlice *slice = unit->content;
1168 err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
1173 err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1175 slice->data_bit_start);
1179 // No slice data - that was just the header.
1186 err = cbs_h265_write_aud(ctx, pbc, unit->content);
1192 case HEVC_NAL_SEI_PREFIX:
1193 case HEVC_NAL_SEI_SUFFIX:
1195 err = cbs_h265_write_sei(ctx, pbc, unit->content,
1196 unit->type == HEVC_NAL_SEI_PREFIX);
1204 av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1205 "NAL unit type %"PRIu32".\n", unit->type);
1206 return AVERROR_PATCHWELCOME;
1212 static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
1213 CodedBitstreamFragment *frag)
1216 size_t max_size, dp, sp;
1217 int err, i, zero_run;
1219 for (i = 0; i < frag->nb_units; i++) {
1220 // Data should already all have been written when we get here.
1221 av_assert0(frag->units[i].data);
1225 for (i = 0; i < frag->nb_units; i++) {
1226 // Start code + content with worst-case emulation prevention.
1227 max_size += 4 + frag->units[i].data_size * 3 / 2;
1230 data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_SIZE);
1232 return AVERROR(ENOMEM);
1235 for (i = 0; i < frag->nb_units; i++) {
1236 CodedBitstreamUnit *unit = &frag->units[i];
1238 if (unit->data_bit_padding > 0) {
1239 if (i < frag->nb_units - 1)
1240 av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
1241 "unaligned padding on non-final NAL unit.\n");
1243 frag->data_bit_padding = unit->data_bit_padding;
1246 if ((ctx->codec->codec_id == AV_CODEC_ID_H264 &&
1247 (unit->type == H264_NAL_SPS ||
1248 unit->type == H264_NAL_PPS)) ||
1249 (ctx->codec->codec_id == AV_CODEC_ID_HEVC &&
1250 (unit->type == HEVC_NAL_VPS ||
1251 unit->type == HEVC_NAL_SPS ||
1252 unit->type == HEVC_NAL_PPS)) ||
1253 i == 0 /* (Assume this is the start of an access unit.) */) {
1257 // start_code_prefix_one_3bytes
1263 for (sp = 0; sp < unit->data_size; sp++) {
1265 if (unit->data[sp] == 0)
1270 if ((unit->data[sp] & ~3) == 0) {
1271 // emulation_prevention_three_byte
1274 zero_run = unit->data[sp] == 0;
1276 data[dp++] = unit->data[sp];
1280 av_assert0(dp <= max_size);
1281 err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
1284 memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1286 frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
1288 if (!frag->data_ref) {
1290 return AVERROR(ENOMEM);
1294 frag->data_size = dp;
1299 static void cbs_h264_flush(CodedBitstreamContext *ctx)
1301 CodedBitstreamH264Context *h264 = ctx->priv_data;
1303 for (int i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++) {
1304 av_buffer_unref(&h264->sps_ref[i]);
1305 h264->sps[i] = NULL;
1307 for (int i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++) {
1308 av_buffer_unref(&h264->pps_ref[i]);
1309 h264->pps[i] = NULL;
1312 h264->active_sps = NULL;
1313 h264->active_pps = NULL;
1314 h264->last_slice_nal_unit_type = 0;
1317 static void cbs_h264_close(CodedBitstreamContext *ctx)
1319 CodedBitstreamH264Context *h264 = ctx->priv_data;
1322 ff_h2645_packet_uninit(&h264->common.read_packet);
1324 for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
1325 av_buffer_unref(&h264->sps_ref[i]);
1326 for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
1327 av_buffer_unref(&h264->pps_ref[i]);
1330 static void cbs_h265_flush(CodedBitstreamContext *ctx)
1332 CodedBitstreamH265Context *h265 = ctx->priv_data;
1334 for (int i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++) {
1335 av_buffer_unref(&h265->vps_ref[i]);
1336 h265->vps[i] = NULL;
1338 for (int i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++) {
1339 av_buffer_unref(&h265->sps_ref[i]);
1340 h265->sps[i] = NULL;
1342 for (int i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++) {
1343 av_buffer_unref(&h265->pps_ref[i]);
1344 h265->pps[i] = NULL;
1347 h265->active_vps = NULL;
1348 h265->active_sps = NULL;
1349 h265->active_pps = NULL;
1352 static void cbs_h265_close(CodedBitstreamContext *ctx)
1354 CodedBitstreamH265Context *h265 = ctx->priv_data;
1357 ff_h2645_packet_uninit(&h265->common.read_packet);
1359 for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
1360 av_buffer_unref(&h265->vps_ref[i]);
1361 for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
1362 av_buffer_unref(&h265->sps_ref[i]);
1363 for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
1364 av_buffer_unref(&h265->pps_ref[i]);
1367 static void cbs_h264_free_sei_payload(H264RawSEIPayload *payload)
1369 switch (payload->payload_type) {
1370 case H264_SEI_TYPE_BUFFERING_PERIOD:
1371 case H264_SEI_TYPE_PIC_TIMING:
1372 case H264_SEI_TYPE_PAN_SCAN_RECT:
1373 case H264_SEI_TYPE_RECOVERY_POINT:
1374 case H264_SEI_TYPE_DISPLAY_ORIENTATION:
1375 case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:
1376 case H264_SEI_TYPE_ALTERNATIVE_TRANSFER:
1378 case H264_SEI_TYPE_USER_DATA_REGISTERED:
1379 av_buffer_unref(&payload->payload.user_data_registered.data_ref);
1381 case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
1382 av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
1385 av_buffer_unref(&payload->payload.other.data_ref);
1390 static void cbs_h264_free_sei(void *opaque, uint8_t *content)
1392 H264RawSEI *sei = (H264RawSEI*)content;
1394 for (i = 0; i < sei->payload_count; i++)
1395 cbs_h264_free_sei_payload(&sei->payload[i]);
1399 static const CodedBitstreamUnitTypeDescriptor cbs_h264_unit_types[] = {
1400 CBS_UNIT_TYPE_POD(H264_NAL_SPS, H264RawSPS),
1401 CBS_UNIT_TYPE_POD(H264_NAL_SPS_EXT, H264RawSPSExtension),
1403 CBS_UNIT_TYPE_INTERNAL_REF(H264_NAL_PPS, H264RawPPS, slice_group_id),
1410 H264_NAL_AUXILIARY_SLICE,
1412 .content_type = CBS_CONTENT_TYPE_INTERNAL_REFS,
1413 .content_size = sizeof(H264RawSlice),
1414 .nb_ref_offsets = 1,
1415 .ref_offsets = { offsetof(H264RawSlice, data) },
1418 CBS_UNIT_TYPE_POD(H264_NAL_AUD, H264RawAUD),
1419 CBS_UNIT_TYPE_POD(H264_NAL_FILLER_DATA, H264RawFiller),
1420 CBS_UNIT_TYPE_POD(H264_NAL_END_SEQUENCE, H264RawNALUnitHeader),
1421 CBS_UNIT_TYPE_POD(H264_NAL_END_STREAM, H264RawNALUnitHeader),
1423 CBS_UNIT_TYPE_COMPLEX(H264_NAL_SEI, H264RawSEI, &cbs_h264_free_sei),
1425 CBS_UNIT_TYPE_END_OF_LIST
1428 static void cbs_h265_free_sei_payload(H265RawSEIPayload *payload)
1430 switch (payload->payload_type) {
1431 case HEVC_SEI_TYPE_BUFFERING_PERIOD:
1432 case HEVC_SEI_TYPE_PICTURE_TIMING:
1433 case HEVC_SEI_TYPE_PAN_SCAN_RECT:
1434 case HEVC_SEI_TYPE_RECOVERY_POINT:
1435 case HEVC_SEI_TYPE_DISPLAY_ORIENTATION:
1436 case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS:
1437 case HEVC_SEI_TYPE_DECODED_PICTURE_HASH:
1438 case HEVC_SEI_TYPE_TIME_CODE:
1439 case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
1440 case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
1441 case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
1442 case HEVC_SEI_TYPE_ALPHA_CHANNEL_INFO:
1444 case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
1445 av_buffer_unref(&payload->payload.user_data_registered.data_ref);
1447 case HEVC_SEI_TYPE_USER_DATA_UNREGISTERED:
1448 av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
1451 av_buffer_unref(&payload->payload.other.data_ref);
1454 av_buffer_unref(&payload->extension_data.data_ref);
1457 static void cbs_h265_free_sei(void *opaque, uint8_t *content)
1459 H265RawSEI *sei = (H265RawSEI*)content;
1461 for (i = 0; i < sei->payload_count; i++)
1462 cbs_h265_free_sei_payload(&sei->payload[i]);
1466 static const CodedBitstreamUnitTypeDescriptor cbs_h265_unit_types[] = {
1467 CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_VPS, H265RawVPS, extension_data.data),
1468 CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_SPS, H265RawSPS, extension_data.data),
1469 CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_PPS, H265RawPPS, extension_data.data),
1471 CBS_UNIT_TYPE_POD(HEVC_NAL_AUD, H265RawAUD),
1474 // Slices of non-IRAP pictures.
1475 .nb_unit_types = CBS_UNIT_TYPE_RANGE,
1476 .unit_type_range_start = HEVC_NAL_TRAIL_N,
1477 .unit_type_range_end = HEVC_NAL_RASL_R,
1479 .content_type = CBS_CONTENT_TYPE_INTERNAL_REFS,
1480 .content_size = sizeof(H265RawSlice),
1481 .nb_ref_offsets = 1,
1482 .ref_offsets = { offsetof(H265RawSlice, data) },
1486 // Slices of IRAP pictures.
1487 .nb_unit_types = CBS_UNIT_TYPE_RANGE,
1488 .unit_type_range_start = HEVC_NAL_BLA_W_LP,
1489 .unit_type_range_end = HEVC_NAL_CRA_NUT,
1491 .content_type = CBS_CONTENT_TYPE_INTERNAL_REFS,
1492 .content_size = sizeof(H265RawSlice),
1493 .nb_ref_offsets = 1,
1494 .ref_offsets = { offsetof(H265RawSlice, data) },
1500 HEVC_NAL_SEI_PREFIX,
1503 .content_type = CBS_CONTENT_TYPE_COMPLEX,
1504 .content_size = sizeof(H265RawSEI),
1505 .content_free = &cbs_h265_free_sei,
1508 CBS_UNIT_TYPE_END_OF_LIST
1511 const CodedBitstreamType ff_cbs_type_h264 = {
1512 .codec_id = AV_CODEC_ID_H264,
1514 .priv_data_size = sizeof(CodedBitstreamH264Context),
1516 .unit_types = cbs_h264_unit_types,
1518 .split_fragment = &cbs_h2645_split_fragment,
1519 .read_unit = &cbs_h264_read_nal_unit,
1520 .write_unit = &cbs_h264_write_nal_unit,
1521 .assemble_fragment = &cbs_h2645_assemble_fragment,
1523 .flush = &cbs_h264_flush,
1524 .close = &cbs_h264_close,
1527 const CodedBitstreamType ff_cbs_type_h265 = {
1528 .codec_id = AV_CODEC_ID_HEVC,
1530 .priv_data_size = sizeof(CodedBitstreamH265Context),
1532 .unit_types = cbs_h265_unit_types,
1534 .split_fragment = &cbs_h2645_split_fragment,
1535 .read_unit = &cbs_h265_read_nal_unit,
1536 .write_unit = &cbs_h265_write_nal_unit,
1537 .assemble_fragment = &cbs_h2645_assemble_fragment,
1539 .flush = &cbs_h265_flush,
1540 .close = &cbs_h265_close,
1543 int ff_cbs_h264_add_sei_message(CodedBitstreamFragment *au,
1544 H264RawSEIPayload *payload)
1546 H264RawSEI *sei = NULL;
1549 // Find an existing SEI NAL unit to add to.
1550 for (i = 0; i < au->nb_units; i++) {
1551 if (au->units[i].type == H264_NAL_SEI) {
1552 sei = au->units[i].content;
1553 if (sei->payload_count < H264_MAX_SEI_PAYLOADS)
1561 // Need to make a new SEI NAL unit. Insert it before the first
1562 // slice data NAL unit; if no slice data, add at the end.
1563 AVBufferRef *sei_ref;
1565 sei = av_mallocz(sizeof(*sei));
1567 err = AVERROR(ENOMEM);
1571 sei->nal_unit_header.nal_unit_type = H264_NAL_SEI;
1572 sei->nal_unit_header.nal_ref_idc = 0;
1574 sei_ref = av_buffer_create((uint8_t*)sei, sizeof(*sei),
1575 &cbs_h264_free_sei, NULL, 0);
1578 err = AVERROR(ENOMEM);
1582 for (i = 0; i < au->nb_units; i++) {
1583 if (au->units[i].type == H264_NAL_SLICE ||
1584 au->units[i].type == H264_NAL_IDR_SLICE)
1588 err = ff_cbs_insert_unit_content(au, i, H264_NAL_SEI,
1590 av_buffer_unref(&sei_ref);
1595 memcpy(&sei->payload[sei->payload_count], payload, sizeof(*payload));
1596 ++sei->payload_count;
1600 cbs_h264_free_sei_payload(payload);
1604 void ff_cbs_h264_delete_sei_message(CodedBitstreamFragment *au,
1605 CodedBitstreamUnit *nal,
1608 H264RawSEI *sei = nal->content;
1610 av_assert0(nal->type == H264_NAL_SEI);
1611 av_assert0(position >= 0 && position < sei->payload_count);
1613 if (position == 0 && sei->payload_count == 1) {
1614 // Deleting NAL unit entirely.
1617 for (i = 0; i < au->nb_units; i++) {
1618 if (&au->units[i] == nal)
1622 ff_cbs_delete_unit(au, i);
1624 cbs_h264_free_sei_payload(&sei->payload[position]);
1626 --sei->payload_count;
1627 memmove(sei->payload + position,
1628 sei->payload + position + 1,
1629 (sei->payload_count - position) * sizeof(*sei->payload));