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"
30 #include "h2645_parse.h"
35 static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
36 const char *name, const int *subscripts,
38 uint32_t range_min, uint32_t range_max)
45 position = get_bits_count(gbc);
47 for (i = 0; i < 32; i++) {
48 if (get_bits_left(gbc) < i + 1) {
49 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
50 "%s: bitstream ended.\n", name);
51 return AVERROR_INVALIDDATA;
54 bits[i] = k ? '1' : '0';
59 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
60 "%s: more than 31 zeroes.\n", name);
61 return AVERROR_INVALIDDATA;
64 for (j = 0; j < i; j++) {
66 bits[i + j + 1] = k ? '1' : '0';
67 value = value << 1 | k;
72 if (ctx->trace_enable)
73 ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
76 if (value < range_min || value > range_max) {
77 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
78 "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
79 name, value, range_min, range_max);
80 return AVERROR_INVALIDDATA;
87 static int cbs_read_se_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
88 const char *name, const int *subscripts,
90 int32_t range_min, int32_t range_max)
98 position = get_bits_count(gbc);
100 for (i = 0; i < 32; i++) {
101 if (get_bits_left(gbc) < i + 1) {
102 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
103 "%s: bitstream ended.\n", name);
104 return AVERROR_INVALIDDATA;
107 bits[i] = k ? '1' : '0';
112 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
113 "%s: more than 31 zeroes.\n", name);
114 return AVERROR_INVALIDDATA;
117 for (j = 0; j < i; j++) {
119 bits[i + j + 1] = k ? '1' : '0';
124 value = -(int32_t)(v / 2);
128 if (ctx->trace_enable)
129 ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
132 if (value < range_min || value > range_max) {
133 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
134 "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
135 name, value, range_min, range_max);
136 return AVERROR_INVALIDDATA;
143 static int cbs_write_ue_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
144 const char *name, const int *subscripts,
146 uint32_t range_min, uint32_t range_max)
150 if (value < range_min || value > range_max) {
151 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
152 "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
153 name, value, range_min, range_max);
154 return AVERROR_INVALIDDATA;
156 av_assert0(value != UINT32_MAX);
158 len = av_log2(value + 1);
159 if (put_bits_left(pbc) < 2 * len + 1)
160 return AVERROR(ENOSPC);
162 if (ctx->trace_enable) {
166 for (i = 0; i < len; i++)
169 for (i = 0; i < len; i++)
170 bits[len + i + 1] = (value + 1) >> (len - i - 1) & 1 ? '1' : '0';
171 bits[len + len + 1] = 0;
173 ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
174 name, subscripts, bits, value);
177 put_bits(pbc, len, 0);
179 put_bits(pbc, len + 1, value + 1);
181 put_bits32(pbc, value + 1);
186 static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
187 const char *name, const int *subscripts,
189 int32_t range_min, int32_t range_max)
194 if (value < range_min || value > range_max) {
195 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
196 "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
197 name, value, range_min, range_max);
198 return AVERROR_INVALIDDATA;
200 av_assert0(value != INT32_MIN);
205 uvalue = 2 * (uint32_t)value - 1;
207 uvalue = 2 * (uint32_t)-value;
209 len = av_log2(uvalue + 1);
210 if (put_bits_left(pbc) < 2 * len + 1)
211 return AVERROR(ENOSPC);
213 if (ctx->trace_enable) {
217 for (i = 0; i < len; i++)
220 for (i = 0; i < len; i++)
221 bits[len + i + 1] = (uvalue + 1) >> (len - i - 1) & 1 ? '1' : '0';
222 bits[len + len + 1] = 0;
224 ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
225 name, subscripts, bits, value);
228 put_bits(pbc, len, 0);
230 put_bits(pbc, len + 1, uvalue + 1);
232 put_bits32(pbc, uvalue + 1);
237 #define HEADER(name) do { \
238 ff_cbs_trace_header(ctx, name); \
241 #define CHECK(call) do { \
247 #define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
248 #define FUNC_H264(rw, name) FUNC_NAME(rw, h264, name)
249 #define FUNC_H265(rw, name) FUNC_NAME(rw, h265, name)
251 #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
253 #define u(width, name, range_min, range_max) \
254 xu(width, name, current->name, range_min, range_max, 0)
255 #define flag(name) u(1, name, 0, 1)
256 #define ue(name, range_min, range_max) \
257 xue(name, current->name, range_min, range_max, 0)
258 #define se(name, range_min, range_max) \
259 xse(name, current->name, range_min, range_max, 0)
261 #define us(width, name, range_min, range_max, subs, ...) \
262 xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__)
263 #define flags(name, subs, ...) \
264 xu(1, name, current->name, 0, 1, subs, __VA_ARGS__)
265 #define ues(name, range_min, range_max, subs, ...) \
266 xue(name, current->name, range_min, range_max, subs, __VA_ARGS__)
267 #define ses(name, range_min, range_max, subs, ...) \
268 xse(name, current->name, range_min, range_max, subs, __VA_ARGS__)
270 #define fixed(width, name, value) do { \
271 av_unused uint32_t fixed_value = value; \
272 xu(width, name, fixed_value, value, value, 0); \
277 #define READWRITE read
278 #define RWContext GetBitContext
280 #define xu(width, name, var, range_min, range_max, subs, ...) do { \
281 uint32_t value = range_min; \
282 CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
283 SUBSCRIPTS(subs, __VA_ARGS__), \
284 &value, range_min, range_max)); \
287 #define xue(name, var, range_min, range_max, subs, ...) do { \
288 uint32_t value = range_min; \
289 CHECK(cbs_read_ue_golomb(ctx, rw, #name, \
290 SUBSCRIPTS(subs, __VA_ARGS__), \
291 &value, range_min, range_max)); \
294 #define xse(name, var, range_min, range_max, subs, ...) do { \
295 int32_t value = range_min; \
296 CHECK(cbs_read_se_golomb(ctx, rw, #name, \
297 SUBSCRIPTS(subs, __VA_ARGS__), \
298 &value, range_min, range_max)); \
303 #define infer(name, value) do { \
304 current->name = value; \
307 static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
309 int bits_left = get_bits_left(gbc);
312 if (show_bits(gbc, bits_left) == 1 << (bits_left - 1))
317 #define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw))
319 #define byte_alignment(rw) (get_bits_count(rw) % 8)
321 #define allocate(name, size) do { \
322 name ## _ref = av_buffer_allocz(size + \
323 AV_INPUT_BUFFER_PADDING_SIZE); \
325 return AVERROR(ENOMEM); \
326 name = name ## _ref->data; \
329 #define FUNC(name) FUNC_H264(READWRITE, name)
330 #include "cbs_h264_syntax_template.c"
333 #define FUNC(name) FUNC_H265(READWRITE, name)
334 #include "cbs_h265_syntax_template.c"
344 #undef more_rbsp_data
345 #undef byte_alignment
350 #define READWRITE write
351 #define RWContext PutBitContext
353 #define xu(width, name, var, range_min, range_max, subs, ...) do { \
354 uint32_t value = var; \
355 CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
356 SUBSCRIPTS(subs, __VA_ARGS__), \
357 value, range_min, range_max)); \
359 #define xue(name, var, range_min, range_max, subs, ...) do { \
360 uint32_t value = var; \
361 CHECK(cbs_write_ue_golomb(ctx, rw, #name, \
362 SUBSCRIPTS(subs, __VA_ARGS__), \
363 value, range_min, range_max)); \
365 #define xse(name, var, range_min, range_max, subs, ...) do { \
366 int32_t value = var; \
367 CHECK(cbs_write_se_golomb(ctx, rw, #name, \
368 SUBSCRIPTS(subs, __VA_ARGS__), \
369 value, range_min, range_max)); \
372 #define infer(name, value) do { \
373 if (current->name != (value)) { \
374 av_log(ctx->log_ctx, AV_LOG_WARNING, "Warning: " \
375 "%s does not match inferred value: " \
376 "%"PRId64", but should be %"PRId64".\n", \
377 #name, (int64_t)current->name, (int64_t)(value)); \
381 #define more_rbsp_data(var) (var)
383 #define byte_alignment(rw) (put_bits_count(rw) % 8)
385 #define allocate(name, size) do { \
387 av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \
388 "for writing.\n", #name); \
389 return AVERROR_INVALIDDATA; \
393 #define FUNC(name) FUNC_H264(READWRITE, name)
394 #include "cbs_h264_syntax_template.c"
397 #define FUNC(name) FUNC_H265(READWRITE, name)
398 #include "cbs_h265_syntax_template.c"
412 #undef more_rbsp_data
413 #undef byte_alignment
417 static void cbs_h264_free_pps(void *unit, uint8_t *content)
419 H264RawPPS *pps = (H264RawPPS*)content;
420 av_buffer_unref(&pps->slice_group_id_ref);
424 static void cbs_h264_free_sei_payload(H264RawSEIPayload *payload)
426 switch (payload->payload_type) {
427 case H264_SEI_TYPE_BUFFERING_PERIOD:
428 case H264_SEI_TYPE_PIC_TIMING:
429 case H264_SEI_TYPE_PAN_SCAN_RECT:
430 case H264_SEI_TYPE_RECOVERY_POINT:
431 case H264_SEI_TYPE_DISPLAY_ORIENTATION:
432 case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME:
434 case H264_SEI_TYPE_USER_DATA_REGISTERED:
435 av_buffer_unref(&payload->payload.user_data_registered.data_ref);
437 case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
438 av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
441 av_buffer_unref(&payload->payload.other.data_ref);
446 static void cbs_h264_free_sei(void *unit, uint8_t *content)
448 H264RawSEI *sei = (H264RawSEI*)content;
450 for (i = 0; i < sei->payload_count; i++)
451 cbs_h264_free_sei_payload(&sei->payload[i]);
455 static void cbs_h264_free_slice(void *unit, uint8_t *content)
457 H264RawSlice *slice = (H264RawSlice*)content;
458 av_buffer_unref(&slice->data_ref);
462 static void cbs_h265_free_vps(void *unit, uint8_t *content)
464 H265RawVPS *vps = (H265RawVPS*)content;
465 av_buffer_unref(&vps->extension_data.data_ref);
469 static void cbs_h265_free_sps(void *unit, uint8_t *content)
471 H265RawSPS *sps = (H265RawSPS*)content;
472 av_buffer_unref(&sps->extension_data.data_ref);
476 static void cbs_h265_free_pps(void *unit, uint8_t *content)
478 H265RawPPS *pps = (H265RawPPS*)content;
479 av_buffer_unref(&pps->extension_data.data_ref);
483 static void cbs_h265_free_slice(void *unit, uint8_t *content)
485 H265RawSlice *slice = (H265RawSlice*)content;
486 av_buffer_unref(&slice->data_ref);
490 static void cbs_h265_free_sei_payload(H265RawSEIPayload *payload)
492 switch (payload->payload_type) {
493 case HEVC_SEI_TYPE_BUFFERING_PERIOD:
494 case HEVC_SEI_TYPE_PICTURE_TIMING:
495 case HEVC_SEI_TYPE_PAN_SCAN_RECT:
496 case HEVC_SEI_TYPE_RECOVERY_POINT:
497 case HEVC_SEI_TYPE_DISPLAY_ORIENTATION:
498 case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS:
499 case HEVC_SEI_TYPE_DECODED_PICTURE_HASH:
500 case HEVC_SEI_TYPE_TIME_CODE:
501 case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
502 case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
503 case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
505 case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
506 av_buffer_unref(&payload->payload.user_data_registered.data_ref);
508 case HEVC_SEI_TYPE_USER_DATA_UNREGISTERED:
509 av_buffer_unref(&payload->payload.user_data_unregistered.data_ref);
512 av_buffer_unref(&payload->payload.other.data_ref);
517 static void cbs_h265_free_sei(void *unit, uint8_t *content)
519 H265RawSEI *sei = (H265RawSEI*)content;
521 for (i = 0; i < sei->payload_count; i++)
522 cbs_h265_free_sei_payload(&sei->payload[i]);
526 static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
527 CodedBitstreamFragment *frag,
528 const H2645Packet *packet)
532 for (i = 0; i < packet->nb_nals; i++) {
533 const H2645NAL *nal = &packet->nals[i];
535 size_t size = nal->size;
537 // Remove trailing zeroes.
538 while (size > 0 && nal->data[size - 1] == 0)
540 av_assert0(size > 0);
542 ref = (nal->data == nal->raw_data) ? frag->data_ref
543 : packet->rbsp.rbsp_buffer_ref;
545 err = ff_cbs_insert_unit_data(ctx, frag, -1, nal->type,
546 (uint8_t*)nal->data, size, ref);
554 static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
555 CodedBitstreamFragment *frag,
558 enum AVCodecID codec_id = ctx->codec->codec_id;
559 CodedBitstreamH2645Context *priv = ctx->priv_data;
563 av_assert0(frag->data && frag->nb_units == 0);
564 if (frag->data_size == 0)
567 if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
569 size_t size, start, end;
570 int i, count, version;
574 bytestream2_init(&gbc, frag->data, frag->data_size);
576 if (bytestream2_get_bytes_left(&gbc) < 6)
577 return AVERROR_INVALIDDATA;
579 version = bytestream2_get_byte(&gbc);
581 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
582 "first byte %u.", version);
583 return AVERROR_INVALIDDATA;
586 bytestream2_skip(&gbc, 3);
587 priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
590 count = bytestream2_get_byte(&gbc) & 0x1f;
591 start = bytestream2_tell(&gbc);
592 for (i = 0; i < count; i++) {
593 if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
594 return AVERROR_INVALIDDATA;
595 size = bytestream2_get_be16(&gbc);
596 if (bytestream2_get_bytes_left(&gbc) < size)
597 return AVERROR_INVALIDDATA;
598 bytestream2_skip(&gbc, size);
600 end = bytestream2_tell(&gbc);
602 err = ff_h2645_packet_split(&priv->read_packet,
603 frag->data + start, end - start,
604 ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
606 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
609 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
614 count = bytestream2_get_byte(&gbc);
615 start = bytestream2_tell(&gbc);
616 for (i = 0; i < count; i++) {
617 if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
618 return AVERROR_INVALIDDATA;
619 size = bytestream2_get_be16(&gbc);
620 if (bytestream2_get_bytes_left(&gbc) < size)
621 return AVERROR_INVALIDDATA;
622 bytestream2_skip(&gbc, size);
624 end = bytestream2_tell(&gbc);
626 err = ff_h2645_packet_split(&priv->read_packet,
627 frag->data + start, end - start,
628 ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1);
630 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
633 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
637 if (bytestream2_get_bytes_left(&gbc) > 0) {
638 av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
639 "header.\n", bytestream2_get_bytes_left(&gbc));
642 } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) {
644 size_t size, start, end;
645 int i, j, nb_arrays, nal_unit_type, nb_nals, version;
649 bytestream2_init(&gbc, frag->data, frag->data_size);
651 if (bytestream2_get_bytes_left(&gbc) < 23)
652 return AVERROR_INVALIDDATA;
654 version = bytestream2_get_byte(&gbc);
656 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: "
657 "first byte %u.", version);
658 return AVERROR_INVALIDDATA;
661 bytestream2_skip(&gbc, 20);
662 priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
664 nb_arrays = bytestream2_get_byte(&gbc);
665 for (i = 0; i < nb_arrays; i++) {
666 nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f;
667 nb_nals = bytestream2_get_be16(&gbc);
669 start = bytestream2_tell(&gbc);
670 for (j = 0; j < nb_nals; j++) {
671 if (bytestream2_get_bytes_left(&gbc) < 2)
672 return AVERROR_INVALIDDATA;
673 size = bytestream2_get_be16(&gbc);
674 if (bytestream2_get_bytes_left(&gbc) < size)
675 return AVERROR_INVALIDDATA;
676 bytestream2_skip(&gbc, size);
678 end = bytestream2_tell(&gbc);
680 err = ff_h2645_packet_split(&priv->read_packet,
681 frag->data + start, end - start,
682 ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1);
684 av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split "
685 "HVCC array %d (%d NAL units of type %d).\n",
686 i, nb_nals, nal_unit_type);
689 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
695 // Annex B, or later MP4 with already-known parameters.
697 err = ff_h2645_packet_split(&priv->read_packet,
698 frag->data, frag->data_size,
700 priv->mp4, priv->nal_length_size,
705 err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
713 #define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
714 static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
715 CodedBitstreamUnit *unit) \
717 CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
718 H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \
719 unsigned int id = ps_var->id_element; \
720 if (id > FF_ARRAY_ELEMS(priv->ps_var)) { \
721 av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
722 " id : %d.\n", id); \
723 return AVERROR_INVALIDDATA; \
725 if (priv->ps_var[id] == priv->active_ ## ps_var) \
726 priv->active_ ## ps_var = NULL ; \
727 av_buffer_unref(&priv->ps_var ## _ref[id]); \
728 if (unit->content_ref) \
729 priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \
731 priv->ps_var ## _ref[id] = av_buffer_alloc(sizeof(*ps_var)); \
732 if (!priv->ps_var ## _ref[id]) \
733 return AVERROR(ENOMEM); \
734 priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \
735 if (!unit->content_ref) \
736 memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
740 cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
741 cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
742 cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
743 cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
744 cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
746 static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
747 CodedBitstreamUnit *unit)
752 err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
756 switch (unit->type) {
761 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps), NULL);
766 err = cbs_h264_read_sps(ctx, &gbc, sps);
770 err = cbs_h264_replace_sps(ctx, unit);
776 case H264_NAL_SPS_EXT:
778 err = ff_cbs_alloc_unit_content(ctx, unit,
779 sizeof(H264RawSPSExtension),
784 err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content);
794 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
800 err = cbs_h264_read_pps(ctx, &gbc, pps);
804 err = cbs_h264_replace_pps(ctx, unit);
811 case H264_NAL_IDR_SLICE:
812 case H264_NAL_AUXILIARY_SLICE:
817 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
818 &cbs_h264_free_slice);
821 slice = unit->content;
823 err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
827 pos = get_bits_count(&gbc);
828 len = unit->data_size;
829 if (!unit->data[len - 1]) {
831 for (z = 0; z < len && !unit->data[len - z - 1]; z++);
832 av_log(ctx->log_ctx, AV_LOG_DEBUG, "Deleted %d trailing zeroes "
833 "from slice data.\n", z);
837 slice->data_size = len - pos / 8;
838 slice->data_ref = av_buffer_ref(unit->data_ref);
839 if (!slice->data_ref)
840 return AVERROR(ENOMEM);
841 slice->data = unit->data + pos / 8;
842 slice->data_bit_start = pos % 8;
848 err = ff_cbs_alloc_unit_content(ctx, unit,
849 sizeof(H264RawAUD), NULL);
853 err = cbs_h264_read_aud(ctx, &gbc, unit->content);
861 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawSEI),
866 err = cbs_h264_read_sei(ctx, &gbc, unit->content);
872 case H264_NAL_FILLER_DATA:
874 err = ff_cbs_alloc_unit_content(ctx, unit,
875 sizeof(H264RawFiller), NULL);
879 err = cbs_h264_read_filler(ctx, &gbc, unit->content);
885 case H264_NAL_END_SEQUENCE:
886 case H264_NAL_END_STREAM:
888 err = ff_cbs_alloc_unit_content(ctx, unit,
889 sizeof(H264RawNALUnitHeader),
894 err = (unit->type == H264_NAL_END_SEQUENCE ?
895 cbs_h264_read_end_of_sequence :
896 cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content);
903 return AVERROR(ENOSYS);
909 static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
910 CodedBitstreamUnit *unit)
915 err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
919 switch (unit->type) {
924 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*vps),
930 err = cbs_h265_read_vps(ctx, &gbc, vps);
934 err = cbs_h265_replace_vps(ctx, unit);
943 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps),
949 err = cbs_h265_read_sps(ctx, &gbc, sps);
953 err = cbs_h265_replace_sps(ctx, unit);
963 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps),
969 err = cbs_h265_read_pps(ctx, &gbc, pps);
973 err = cbs_h265_replace_pps(ctx, unit);
979 case HEVC_NAL_TRAIL_N:
980 case HEVC_NAL_TRAIL_R:
983 case HEVC_NAL_STSA_N:
984 case HEVC_NAL_STSA_R:
985 case HEVC_NAL_RADL_N:
986 case HEVC_NAL_RADL_R:
987 case HEVC_NAL_RASL_N:
988 case HEVC_NAL_RASL_R:
989 case HEVC_NAL_BLA_W_LP:
990 case HEVC_NAL_BLA_W_RADL:
991 case HEVC_NAL_BLA_N_LP:
992 case HEVC_NAL_IDR_W_RADL:
993 case HEVC_NAL_IDR_N_LP:
994 case HEVC_NAL_CRA_NUT:
999 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice),
1000 &cbs_h265_free_slice);
1003 slice = unit->content;
1005 err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header);
1009 pos = get_bits_count(&gbc);
1010 len = unit->data_size;
1011 if (!unit->data[len - 1]) {
1013 for (z = 0; z < len && !unit->data[len - z - 1]; z++);
1014 av_log(ctx->log_ctx, AV_LOG_DEBUG, "Deleted %d trailing zeroes "
1015 "from slice data.\n", z);
1019 slice->data_size = len - pos / 8;
1020 slice->data_ref = av_buffer_ref(unit->data_ref);
1021 if (!slice->data_ref)
1022 return AVERROR(ENOMEM);
1023 slice->data = unit->data + pos / 8;
1024 slice->data_bit_start = pos % 8;
1030 err = ff_cbs_alloc_unit_content(ctx, unit,
1031 sizeof(H265RawAUD), NULL);
1035 err = cbs_h265_read_aud(ctx, &gbc, unit->content);
1041 case HEVC_NAL_SEI_PREFIX:
1042 case HEVC_NAL_SEI_SUFFIX:
1044 err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawSEI),
1045 &cbs_h265_free_sei);
1050 err = cbs_h265_read_sei(ctx, &gbc, unit->content,
1051 unit->type == HEVC_NAL_SEI_PREFIX);
1059 return AVERROR(ENOSYS);
1065 static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
1066 PutBitContext *pbc, const uint8_t *data,
1067 size_t data_size, int data_bit_start)
1069 size_t rest = data_size - (data_bit_start + 7) / 8;
1070 const uint8_t *pos = data + data_bit_start / 8;
1072 av_assert0(data_bit_start >= 0 &&
1073 8 * data_size > data_bit_start);
1075 if (data_size * 8 + 8 > put_bits_left(pbc))
1076 return AVERROR(ENOSPC);
1079 goto rbsp_stop_one_bit;
1081 // First copy the remaining bits of the first byte
1082 // The above check ensures that we do not accidentally
1083 // copy beyond the rbsp_stop_one_bit.
1084 if (data_bit_start % 8)
1085 put_bits(pbc, 8 - data_bit_start % 8,
1086 *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8));
1088 if (put_bits_count(pbc) % 8 == 0) {
1089 // If the writer is aligned at this point,
1090 // memcpy can be used to improve performance.
1091 // This happens normally for CABAC.
1092 flush_put_bits(pbc);
1093 memcpy(put_bits_ptr(pbc), pos, rest);
1094 skip_put_bytes(pbc, rest);
1096 // If not, we have to copy manually.
1097 // rbsp_stop_one_bit forces us to special-case
1102 for (; rest > 4; rest -= 4, pos += 4)
1103 put_bits32(pbc, AV_RB32(pos));
1105 for (; rest > 1; rest--, pos++)
1106 put_bits(pbc, 8, *pos);
1109 temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8);
1114 i = rest ? (8 - i) : (8 - i - data_bit_start % 8);
1115 put_bits(pbc, i, temp);
1116 if (put_bits_count(pbc) % 8)
1117 put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0);
1123 static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
1124 CodedBitstreamUnit *unit,
1129 switch (unit->type) {
1132 H264RawSPS *sps = unit->content;
1134 err = cbs_h264_write_sps(ctx, pbc, sps);
1138 err = cbs_h264_replace_sps(ctx, unit);
1144 case H264_NAL_SPS_EXT:
1146 H264RawSPSExtension *sps_ext = unit->content;
1148 err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
1156 H264RawPPS *pps = unit->content;
1158 err = cbs_h264_write_pps(ctx, pbc, pps);
1162 err = cbs_h264_replace_pps(ctx, unit);
1168 case H264_NAL_SLICE:
1169 case H264_NAL_IDR_SLICE:
1170 case H264_NAL_AUXILIARY_SLICE:
1172 H264RawSlice *slice = unit->content;
1174 err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
1179 err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1181 slice->data_bit_start);
1185 // No slice data - that was just the header.
1186 // (Bitstream may be unaligned!)
1193 err = cbs_h264_write_aud(ctx, pbc, unit->content);
1201 err = cbs_h264_write_sei(ctx, pbc, unit->content);
1207 case H264_NAL_FILLER_DATA:
1209 err = cbs_h264_write_filler(ctx, pbc, unit->content);
1215 case H264_NAL_END_SEQUENCE:
1217 err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content);
1223 case H264_NAL_END_STREAM:
1225 err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content);
1232 av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1233 "NAL unit type %"PRIu32".\n", unit->type);
1234 return AVERROR_PATCHWELCOME;
1240 static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
1241 CodedBitstreamUnit *unit,
1246 switch (unit->type) {
1249 H265RawVPS *vps = unit->content;
1251 err = cbs_h265_write_vps(ctx, pbc, vps);
1255 err = cbs_h265_replace_vps(ctx, unit);
1263 H265RawSPS *sps = unit->content;
1265 err = cbs_h265_write_sps(ctx, pbc, sps);
1269 err = cbs_h265_replace_sps(ctx, unit);
1277 H265RawPPS *pps = unit->content;
1279 err = cbs_h265_write_pps(ctx, pbc, pps);
1283 err = cbs_h265_replace_pps(ctx, unit);
1289 case HEVC_NAL_TRAIL_N:
1290 case HEVC_NAL_TRAIL_R:
1291 case HEVC_NAL_TSA_N:
1292 case HEVC_NAL_TSA_R:
1293 case HEVC_NAL_STSA_N:
1294 case HEVC_NAL_STSA_R:
1295 case HEVC_NAL_RADL_N:
1296 case HEVC_NAL_RADL_R:
1297 case HEVC_NAL_RASL_N:
1298 case HEVC_NAL_RASL_R:
1299 case HEVC_NAL_BLA_W_LP:
1300 case HEVC_NAL_BLA_W_RADL:
1301 case HEVC_NAL_BLA_N_LP:
1302 case HEVC_NAL_IDR_W_RADL:
1303 case HEVC_NAL_IDR_N_LP:
1304 case HEVC_NAL_CRA_NUT:
1306 H265RawSlice *slice = unit->content;
1308 err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header);
1313 err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
1315 slice->data_bit_start);
1319 // No slice data - that was just the header.
1326 err = cbs_h265_write_aud(ctx, pbc, unit->content);
1332 case HEVC_NAL_SEI_PREFIX:
1333 case HEVC_NAL_SEI_SUFFIX:
1335 err = cbs_h265_write_sei(ctx, pbc, unit->content,
1336 unit->type == HEVC_NAL_SEI_PREFIX);
1344 av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
1345 "NAL unit type %"PRIu32".\n", unit->type);
1346 return AVERROR_PATCHWELCOME;
1352 static int cbs_h2645_write_nal_unit(CodedBitstreamContext *ctx,
1353 CodedBitstreamUnit *unit)
1355 CodedBitstreamH2645Context *priv = ctx->priv_data;
1356 enum AVCodecID codec_id = ctx->codec->codec_id;
1360 if (!priv->write_buffer) {
1361 // Initial write buffer size is 1MB.
1362 priv->write_buffer_size = 1024 * 1024;
1364 reallocate_and_try_again:
1365 err = av_reallocp(&priv->write_buffer, priv->write_buffer_size);
1367 av_log(ctx->log_ctx, AV_LOG_ERROR, "Unable to allocate a "
1368 "sufficiently large write buffer (last attempt "
1369 "%"SIZE_SPECIFIER" bytes).\n", priv->write_buffer_size);
1374 init_put_bits(&pbc, priv->write_buffer, priv->write_buffer_size);
1376 if (codec_id == AV_CODEC_ID_H264)
1377 err = cbs_h264_write_nal_unit(ctx, unit, &pbc);
1379 err = cbs_h265_write_nal_unit(ctx, unit, &pbc);
1381 if (err == AVERROR(ENOSPC)) {
1383 priv->write_buffer_size *= 2;
1384 goto reallocate_and_try_again;
1386 // Overflow but we didn't notice.
1387 av_assert0(put_bits_count(&pbc) <= 8 * priv->write_buffer_size);
1390 // Write failed for some other reason.
1394 if (put_bits_count(&pbc) % 8)
1395 unit->data_bit_padding = 8 - put_bits_count(&pbc) % 8;
1397 unit->data_bit_padding = 0;
1399 unit->data_size = (put_bits_count(&pbc) + 7) / 8;
1400 flush_put_bits(&pbc);
1402 err = ff_cbs_alloc_unit_data(ctx, unit, unit->data_size);
1406 memcpy(unit->data, priv->write_buffer, unit->data_size);
1411 static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
1412 CodedBitstreamFragment *frag)
1415 size_t max_size, dp, sp;
1416 int err, i, zero_run;
1418 for (i = 0; i < frag->nb_units; i++) {
1419 // Data should already all have been written when we get here.
1420 av_assert0(frag->units[i].data);
1424 for (i = 0; i < frag->nb_units; i++) {
1425 // Start code + content with worst-case emulation prevention.
1426 max_size += 3 + frag->units[i].data_size * 3 / 2;
1429 data = av_malloc(max_size + AV_INPUT_BUFFER_PADDING_SIZE);
1431 return AVERROR(ENOMEM);
1434 for (i = 0; i < frag->nb_units; i++) {
1435 CodedBitstreamUnit *unit = &frag->units[i];
1437 if (unit->data_bit_padding > 0) {
1438 if (i < frag->nb_units - 1)
1439 av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
1440 "unaligned padding on non-final NAL unit.\n");
1442 frag->data_bit_padding = unit->data_bit_padding;
1445 if ((ctx->codec->codec_id == AV_CODEC_ID_H264 &&
1446 (unit->type == H264_NAL_SPS ||
1447 unit->type == H264_NAL_PPS)) ||
1448 (ctx->codec->codec_id == AV_CODEC_ID_HEVC &&
1449 (unit->type == HEVC_NAL_VPS ||
1450 unit->type == HEVC_NAL_SPS ||
1451 unit->type == HEVC_NAL_PPS)) ||
1452 i == 0 /* (Assume this is the start of an access unit.) */) {
1456 // start_code_prefix_one_3bytes
1462 for (sp = 0; sp < unit->data_size; sp++) {
1464 if (unit->data[sp] == 0)
1469 if ((unit->data[sp] & ~3) == 0) {
1470 // emulation_prevention_three_byte
1473 zero_run = unit->data[sp] == 0;
1475 data[dp++] = unit->data[sp];
1479 av_assert0(dp <= max_size);
1480 err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
1483 memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1485 frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
1487 if (!frag->data_ref) {
1489 return AVERROR(ENOMEM);
1493 frag->data_size = dp;
1498 static void cbs_h264_close(CodedBitstreamContext *ctx)
1500 CodedBitstreamH264Context *h264 = ctx->priv_data;
1503 ff_h2645_packet_uninit(&h264->common.read_packet);
1505 av_freep(&h264->common.write_buffer);
1507 for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
1508 av_buffer_unref(&h264->sps_ref[i]);
1509 for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
1510 av_buffer_unref(&h264->pps_ref[i]);
1513 static void cbs_h265_close(CodedBitstreamContext *ctx)
1515 CodedBitstreamH265Context *h265 = ctx->priv_data;
1518 ff_h2645_packet_uninit(&h265->common.read_packet);
1520 av_freep(&h265->common.write_buffer);
1522 for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++)
1523 av_buffer_unref(&h265->vps_ref[i]);
1524 for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++)
1525 av_buffer_unref(&h265->sps_ref[i]);
1526 for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++)
1527 av_buffer_unref(&h265->pps_ref[i]);
1530 const CodedBitstreamType ff_cbs_type_h264 = {
1531 .codec_id = AV_CODEC_ID_H264,
1533 .priv_data_size = sizeof(CodedBitstreamH264Context),
1535 .split_fragment = &cbs_h2645_split_fragment,
1536 .read_unit = &cbs_h264_read_nal_unit,
1537 .write_unit = &cbs_h2645_write_nal_unit,
1538 .assemble_fragment = &cbs_h2645_assemble_fragment,
1540 .close = &cbs_h264_close,
1543 const CodedBitstreamType ff_cbs_type_h265 = {
1544 .codec_id = AV_CODEC_ID_HEVC,
1546 .priv_data_size = sizeof(CodedBitstreamH265Context),
1548 .split_fragment = &cbs_h2645_split_fragment,
1549 .read_unit = &cbs_h265_read_nal_unit,
1550 .write_unit = &cbs_h2645_write_nal_unit,
1551 .assemble_fragment = &cbs_h2645_assemble_fragment,
1553 .close = &cbs_h265_close,
1556 int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
1557 CodedBitstreamFragment *au,
1558 const H264RawSEIPayload *payload)
1561 CodedBitstreamUnit *nal = NULL;
1564 // Find an existing SEI NAL unit to add to.
1565 for (i = 0; i < au->nb_units; i++) {
1566 if (au->units[i].type == H264_NAL_SEI) {
1567 nal = &au->units[i];
1575 // Need to make a new SEI NAL unit. Insert it before the first
1576 // slice data NAL unit; if no slice data, add at the end.
1577 AVBufferRef *sei_ref;
1579 sei = av_mallocz(sizeof(*sei));
1581 return AVERROR(ENOMEM);
1583 sei->nal_unit_header.nal_unit_type = H264_NAL_SEI;
1584 sei->nal_unit_header.nal_ref_idc = 0;
1586 sei_ref = av_buffer_create((uint8_t*)sei, sizeof(*sei),
1587 &cbs_h264_free_sei, ctx, 0);
1590 return AVERROR(ENOMEM);
1593 for (i = 0; i < au->nb_units; i++) {
1594 if (au->units[i].type == H264_NAL_SLICE ||
1595 au->units[i].type == H264_NAL_IDR_SLICE)
1599 err = ff_cbs_insert_unit_content(ctx, au, i, H264_NAL_SEI,
1601 av_buffer_unref(&sei_ref);
1606 if (sei->payload_count >= H264_MAX_SEI_PAYLOADS) {
1607 av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "
1609 return AVERROR(EINVAL);
1612 memcpy(&sei->payload[sei->payload_count], payload, sizeof(*payload));
1613 ++sei->payload_count;
1618 int ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
1619 CodedBitstreamFragment *au,
1620 CodedBitstreamUnit *nal,
1623 H264RawSEI *sei = nal->content;
1625 av_assert0(nal->type == H264_NAL_SEI);
1626 av_assert0(position >= 0 && position < sei->payload_count);
1628 if (position == 0 && sei->payload_count == 1) {
1629 // Deleting NAL unit entirely.
1632 for (i = 0; i < au->nb_units; i++) {
1633 if (&au->units[i] == nal)
1636 av_assert0(i < au->nb_units && "NAL unit not in access unit.");
1638 return ff_cbs_delete_unit(ctx, au, i);
1640 cbs_h264_free_sei_payload(&sei->payload[position]);
1642 --sei->payload_count;
1643 memmove(sei->payload + position,
1644 sei->payload + position + 1,
1645 (sei->payload_count - position) * sizeof(*sei->payload));