/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/attributes.h" #include "libavutil/avassert.h" #include "bytestream.h" #include "cbs.h" #include "cbs_internal.h" #include "cbs_h264.h" #include "cbs_h265.h" #include "h264.h" #include "h264_sei.h" #include "h2645_parse.h" #include "hevc.h" #include "hevc_sei.h" static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc, const char *name, const int *subscripts, uint32_t *write_to, uint32_t range_min, uint32_t range_max) { uint32_t value; int position, i, j; unsigned int k; char bits[65]; position = get_bits_count(gbc); for (i = 0; i < 32; i++) { if (get_bits_left(gbc) < i + 1) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at " "%s: bitstream ended.\n", name); return AVERROR_INVALIDDATA; } k = get_bits1(gbc); bits[i] = k ? '1' : '0'; if (k) break; } if (i >= 32) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at " "%s: more than 31 zeroes.\n", name); return AVERROR_INVALIDDATA; } value = 1; for (j = 0; j < i; j++) { k = get_bits1(gbc); bits[i + j + 1] = k ? '1' : '0'; value = value << 1 | k; } bits[i + j + 1] = 0; --value; if (ctx->trace_enable) ff_cbs_trace_syntax_element(ctx, position, name, subscripts, 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_read_se_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc, const char *name, const int *subscripts, int32_t *write_to, int32_t range_min, int32_t range_max) { int32_t value; int position, i, j; unsigned int k; uint32_t v; char bits[65]; position = get_bits_count(gbc); for (i = 0; i < 32; i++) { if (get_bits_left(gbc) < i + 1) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at " "%s: bitstream ended.\n", name); return AVERROR_INVALIDDATA; } k = get_bits1(gbc); bits[i] = k ? '1' : '0'; if (k) break; } if (i >= 32) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at " "%s: more than 31 zeroes.\n", name); return AVERROR_INVALIDDATA; } v = 1; for (j = 0; j < i; j++) { k = get_bits1(gbc); bits[i + j + 1] = k ? '1' : '0'; v = v << 1 | k; } bits[i + j + 1] = 0; if (v & 1) value = -(int32_t)(v / 2); else value = v / 2; if (ctx->trace_enable) ff_cbs_trace_syntax_element(ctx, position, name, subscripts, bits, value); if (value < range_min || value > range_max) { av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: " "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n", name, value, range_min, range_max); return AVERROR_INVALIDDATA; } *write_to = value; return 0; } static int cbs_write_ue_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc, const char *name, const int *subscripts, uint32_t value, uint32_t range_min, uint32_t range_max) { int len; if (value < range_min || value > range_max) { av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: " "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n", name, value, range_min, range_max); return AVERROR_INVALIDDATA; } av_assert0(value != UINT32_MAX); len = av_log2(value + 1); if (put_bits_left(pbc) < 2 * len + 1) return AVERROR(ENOSPC); if (ctx->trace_enable) { char bits[65]; int i; for (i = 0; i < len; i++) bits[i] = '0'; bits[len] = '1'; for (i = 0; i < len; i++) bits[len + i + 1] = (value + 1) >> (len - i - 1) & 1 ? '1' : '0'; bits[len + len + 1] = 0; ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc), name, subscripts, bits, value); } put_bits(pbc, len, 0); if (len + 1 < 32) put_bits(pbc, len + 1, value + 1); else put_bits32(pbc, value + 1); return 0; } static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc, const char *name, const int *subscripts, int32_t value, int32_t range_min, int32_t range_max) { int len; uint32_t uvalue; if (value < range_min || value > range_max) { av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: " "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n", name, value, range_min, range_max); return AVERROR_INVALIDDATA; } av_assert0(value != INT32_MIN); if (value == 0) uvalue = 0; else if (value > 0) uvalue = 2 * (uint32_t)value - 1; else uvalue = 2 * (uint32_t)-value; len = av_log2(uvalue + 1); if (put_bits_left(pbc) < 2 * len + 1) return AVERROR(ENOSPC); if (ctx->trace_enable) { char bits[65]; int i; for (i = 0; i < len; i++) bits[i] = '0'; bits[len] = '1'; for (i = 0; i < len; i++) bits[len + i + 1] = (uvalue + 1) >> (len - i - 1) & 1 ? '1' : '0'; bits[len + len + 1] = 0; ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc), name, subscripts, bits, value); } put_bits(pbc, len, 0); if (len + 1 < 32) put_bits(pbc, len + 1, uvalue + 1); else put_bits32(pbc, uvalue + 1); return 0; } #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_H264(rw, name) FUNC_NAME(rw, h264, name) #define FUNC_H265(rw, name) FUNC_NAME(rw, h265, name) #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL) #define u(width, name, range_min, range_max) \ xu(width, name, current->name, range_min, range_max, 0) #define ub(width, name) \ xu(width, name, current->name, 0, MAX_UINT_BITS(width), 0) #define flag(name) ub(1, name) #define ue(name, range_min, range_max) \ xue(name, current->name, range_min, range_max, 0) #define i(width, name, range_min, range_max) \ xi(width, name, current->name, range_min, range_max, 0) #define ib(width, name) \ xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), 0) #define se(name, range_min, range_max) \ xse(name, current->name, range_min, range_max, 0) #define us(width, name, range_min, range_max, subs, ...) \ xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__) #define ubs(width, name, subs, ...) \ xu(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__) #define flags(name, subs, ...) \ xu(1, name, current->name, 0, 1, subs, __VA_ARGS__) #define ues(name, range_min, range_max, subs, ...) \ xue(name, current->name, range_min, range_max, subs, __VA_ARGS__) #define is(width, name, range_min, range_max, subs, ...) \ xi(width, name, current->name, range_min, range_max, subs, __VA_ARGS__) #define ibs(width, name, subs, ...) \ xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), subs, __VA_ARGS__) #define ses(name, range_min, range_max, subs, ...) \ xse(name, current->name, range_min, range_max, subs, __VA_ARGS__) #define fixed(width, name, value) do { \ av_unused uint32_t fixed_value = value; \ xu(width, name, fixed_value, value, value, 0); \ } while (0) #define READ #define READWRITE read #define RWContext GetBitContext #define xu(width, name, var, range_min, range_max, subs, ...) do { \ uint32_t value; \ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xue(name, var, range_min, range_max, subs, ...) do { \ uint32_t value; \ CHECK(cbs_read_ue_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xi(width, name, var, range_min, range_max, subs, ...) do { \ int32_t value; \ CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xse(name, var, range_min, range_max, subs, ...) do { \ int32_t value; \ CHECK(cbs_read_se_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define infer(name, value) do { \ current->name = value; \ } while (0) static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc) { int bits_left = get_bits_left(gbc); if (bits_left > 8) return 1; if (bits_left == 0) return 0; if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1)) return 1; return 0; } #define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw)) #define byte_alignment(rw) (get_bits_count(rw) % 8) #define allocate(name, size) do { \ name ## _ref = av_buffer_allocz(size + \ AV_INPUT_BUFFER_PADDING_SIZE); \ if (!name ## _ref) \ return AVERROR(ENOMEM); \ name = name ## _ref->data; \ } while (0) #define FUNC(name) FUNC_H264(READWRITE, name) #include "cbs_h264_syntax_template.c" #undef FUNC #define FUNC(name) FUNC_H265(READWRITE, name) #include "cbs_h265_syntax_template.c" #undef FUNC #undef READ #undef READWRITE #undef RWContext #undef xu #undef xi #undef xue #undef xse #undef infer #undef more_rbsp_data #undef byte_alignment #undef allocate #define WRITE #define READWRITE write #define RWContext PutBitContext #define xu(width, name, var, range_min, range_max, subs, ...) do { \ uint32_t value = var; \ CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ value, range_min, range_max)); \ } while (0) #define xue(name, var, range_min, range_max, subs, ...) do { \ uint32_t value = var; \ CHECK(cbs_write_ue_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ value, range_min, range_max)); \ } while (0) #define xi(width, name, var, range_min, range_max, subs, ...) do { \ int32_t value = var; \ CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ value, range_min, range_max)); \ } while (0) #define xse(name, var, range_min, range_max, subs, ...) do { \ int32_t value = var; \ CHECK(cbs_write_se_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ value, range_min, range_max)); \ } while (0) #define infer(name, value) do { \ if (current->name != (value)) { \ av_log(ctx->log_ctx, AV_LOG_WARNING, "Warning: " \ "%s does not match inferred value: " \ "%"PRId64", but should be %"PRId64".\n", \ #name, (int64_t)current->name, (int64_t)(value)); \ } \ } while (0) #define more_rbsp_data(var) (var) #define byte_alignment(rw) (put_bits_count(rw) % 8) #define allocate(name, size) do { \ if (!name) { \ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \ "for writing.\n", #name); \ return AVERROR_INVALIDDATA; \ } \ } while (0) #define FUNC(name) FUNC_H264(READWRITE, name) #include "cbs_h264_syntax_template.c" #undef FUNC #define FUNC(name) FUNC_H265(READWRITE, name) #include "cbs_h265_syntax_template.c" #undef FUNC #undef WRITE #undef READWRITE #undef RWContext #undef xu #undef xi #undef xue #undef xse #undef u #undef i #undef flag #undef ue #undef se #undef infer #undef more_rbsp_data #undef byte_alignment #undef allocate static void cbs_h264_free_pps(void *unit, uint8_t *content) { H264RawPPS *pps = (H264RawPPS*)content; av_buffer_unref(&pps->slice_group_id_ref); av_freep(&content); } static void cbs_h264_free_sei_payload(H264RawSEIPayload *payload) { switch (payload->payload_type) { case H264_SEI_TYPE_BUFFERING_PERIOD: case H264_SEI_TYPE_PIC_TIMING: case H264_SEI_TYPE_PAN_SCAN_RECT: case H264_SEI_TYPE_RECOVERY_POINT: case H264_SEI_TYPE_DISPLAY_ORIENTATION: case H264_SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME: case H264_SEI_TYPE_ALTERNATIVE_TRANSFER: break; case H264_SEI_TYPE_USER_DATA_REGISTERED: av_buffer_unref(&payload->payload.user_data_registered.data_ref); break; case H264_SEI_TYPE_USER_DATA_UNREGISTERED: av_buffer_unref(&payload->payload.user_data_unregistered.data_ref); break; default: av_buffer_unref(&payload->payload.other.data_ref); break; } } static void cbs_h264_free_sei(void *unit, uint8_t *content) { H264RawSEI *sei = (H264RawSEI*)content; int i; for (i = 0; i < sei->payload_count; i++) cbs_h264_free_sei_payload(&sei->payload[i]); av_freep(&content); } static void cbs_h264_free_slice(void *unit, uint8_t *content) { H264RawSlice *slice = (H264RawSlice*)content; av_buffer_unref(&slice->data_ref); av_freep(&content); } static void cbs_h265_free_vps(void *unit, uint8_t *content) { H265RawVPS *vps = (H265RawVPS*)content; av_buffer_unref(&vps->extension_data.data_ref); av_freep(&content); } static void cbs_h265_free_sps(void *unit, uint8_t *content) { H265RawSPS *sps = (H265RawSPS*)content; av_buffer_unref(&sps->extension_data.data_ref); av_freep(&content); } static void cbs_h265_free_pps(void *unit, uint8_t *content) { H265RawPPS *pps = (H265RawPPS*)content; av_buffer_unref(&pps->extension_data.data_ref); av_freep(&content); } static void cbs_h265_free_slice(void *unit, uint8_t *content) { H265RawSlice *slice = (H265RawSlice*)content; av_buffer_unref(&slice->data_ref); av_freep(&content); } static void cbs_h265_free_sei_payload(H265RawSEIPayload *payload) { switch (payload->payload_type) { case HEVC_SEI_TYPE_BUFFERING_PERIOD: case HEVC_SEI_TYPE_PICTURE_TIMING: case HEVC_SEI_TYPE_PAN_SCAN_RECT: case HEVC_SEI_TYPE_RECOVERY_POINT: case HEVC_SEI_TYPE_DISPLAY_ORIENTATION: case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS: case HEVC_SEI_TYPE_DECODED_PICTURE_HASH: case HEVC_SEI_TYPE_TIME_CODE: case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO: case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO: case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS: case HEVC_SEI_TYPE_ALPHA_CHANNEL_INFO: break; case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35: av_buffer_unref(&payload->payload.user_data_registered.data_ref); break; case HEVC_SEI_TYPE_USER_DATA_UNREGISTERED: av_buffer_unref(&payload->payload.user_data_unregistered.data_ref); break; default: av_buffer_unref(&payload->payload.other.data_ref); break; } } static void cbs_h265_free_sei(void *unit, uint8_t *content) { H265RawSEI *sei = (H265RawSEI*)content; int i; for (i = 0; i < sei->payload_count; i++) cbs_h265_free_sei_payload(&sei->payload[i]); av_freep(&content); } static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, const H2645Packet *packet) { int err, i; for (i = 0; i < packet->nb_nals; i++) { const H2645NAL *nal = &packet->nals[i]; AVBufferRef *ref; size_t size = nal->size; // Remove trailing zeroes. while (size > 0 && nal->data[size - 1] == 0) --size; if (size == 0) { av_log(ctx->log_ctx, AV_LOG_VERBOSE, "Discarding empty 0 NAL unit\n"); continue; } ref = (nal->data == nal->raw_data) ? frag->data_ref : packet->rbsp.rbsp_buffer_ref; err = ff_cbs_insert_unit_data(ctx, frag, -1, nal->type, (uint8_t*)nal->data, size, ref); if (err < 0) return err; } return 0; } static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag, int header) { enum AVCodecID codec_id = ctx->codec->codec_id; CodedBitstreamH2645Context *priv = ctx->priv_data; GetByteContext gbc; int err; av_assert0(frag->data && frag->nb_units == 0); if (frag->data_size == 0) return 0; if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) { // AVCC header. size_t size, start, end; int i, count, version; priv->mp4 = 1; bytestream2_init(&gbc, frag->data, frag->data_size); if (bytestream2_get_bytes_left(&gbc) < 6) return AVERROR_INVALIDDATA; version = bytestream2_get_byte(&gbc); if (version != 1) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: " "first byte %u.", version); return AVERROR_INVALIDDATA; } bytestream2_skip(&gbc, 3); priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1; // SPS array. count = bytestream2_get_byte(&gbc) & 0x1f; start = bytestream2_tell(&gbc); for (i = 0; i < count; i++) { if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i)) return AVERROR_INVALIDDATA; size = bytestream2_get_be16(&gbc); if (bytestream2_get_bytes_left(&gbc) < size) return AVERROR_INVALIDDATA; bytestream2_skip(&gbc, size); } end = bytestream2_tell(&gbc); err = ff_h2645_packet_split(&priv->read_packet, frag->data + start, end - start, ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1); if (err < 0) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n"); return err; } err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet); if (err < 0) return err; // PPS array. count = bytestream2_get_byte(&gbc); start = bytestream2_tell(&gbc); for (i = 0; i < count; i++) { if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i)) return AVERROR_INVALIDDATA; size = bytestream2_get_be16(&gbc); if (bytestream2_get_bytes_left(&gbc) < size) return AVERROR_INVALIDDATA; bytestream2_skip(&gbc, size); } end = bytestream2_tell(&gbc); err = ff_h2645_packet_split(&priv->read_packet, frag->data + start, end - start, ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1, 1); if (err < 0) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n"); return err; } err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet); if (err < 0) return err; if (bytestream2_get_bytes_left(&gbc) > 0) { av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC " "header.\n", bytestream2_get_bytes_left(&gbc)); } } else if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) { // HVCC header. size_t size, start, end; int i, j, nb_arrays, nal_unit_type, nb_nals, version; priv->mp4 = 1; bytestream2_init(&gbc, frag->data, frag->data_size); if (bytestream2_get_bytes_left(&gbc) < 23) return AVERROR_INVALIDDATA; version = bytestream2_get_byte(&gbc); if (version != 1) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: " "first byte %u.", version); return AVERROR_INVALIDDATA; } bytestream2_skip(&gbc, 20); priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1; nb_arrays = bytestream2_get_byte(&gbc); for (i = 0; i < nb_arrays; i++) { nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f; nb_nals = bytestream2_get_be16(&gbc); start = bytestream2_tell(&gbc); for (j = 0; j < nb_nals; j++) { if (bytestream2_get_bytes_left(&gbc) < 2) return AVERROR_INVALIDDATA; size = bytestream2_get_be16(&gbc); if (bytestream2_get_bytes_left(&gbc) < size) return AVERROR_INVALIDDATA; bytestream2_skip(&gbc, size); } end = bytestream2_tell(&gbc); err = ff_h2645_packet_split(&priv->read_packet, frag->data + start, end - start, ctx->log_ctx, 1, 2, AV_CODEC_ID_HEVC, 1, 1); if (err < 0) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split " "HVCC array %d (%d NAL units of type %d).\n", i, nb_nals, nal_unit_type); return err; } err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet); if (err < 0) return err; } } else { // Annex B, or later MP4 with already-known parameters. err = ff_h2645_packet_split(&priv->read_packet, frag->data, frag->data_size, ctx->log_ctx, priv->mp4, priv->nal_length_size, codec_id, 1, 1); if (err < 0) return err; err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet); if (err < 0) return err; } return 0; } #define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \ static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \ CodedBitstreamUnit *unit) \ { \ CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \ H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \ unsigned int id = ps_var->id_element; \ if (id >= FF_ARRAY_ELEMS(priv->ps_var)) { \ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \ " id : %d.\n", id); \ return AVERROR_INVALIDDATA; \ } \ if (priv->ps_var[id] == priv->active_ ## ps_var) \ priv->active_ ## ps_var = NULL ; \ av_buffer_unref(&priv->ps_var ## _ref[id]); \ if (unit->content_ref) \ priv->ps_var ## _ref[id] = av_buffer_ref(unit->content_ref); \ else \ priv->ps_var ## _ref[id] = av_buffer_alloc(sizeof(*ps_var)); \ if (!priv->ps_var ## _ref[id]) \ return AVERROR(ENOMEM); \ priv->ps_var[id] = (H26 ## h26n ## Raw ## ps_name *)priv->ps_var ## _ref[id]->data; \ if (!unit->content_ref) \ memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \ return 0; \ } cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id) cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id) cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id) cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id) cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id) static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit) { GetBitContext gbc; int err; err = init_get_bits(&gbc, unit->data, 8 * unit->data_size); if (err < 0) return err; switch (unit->type) { case H264_NAL_SPS: { H264RawSPS *sps; err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps), NULL); if (err < 0) return err; sps = unit->content; err = cbs_h264_read_sps(ctx, &gbc, sps); if (err < 0) return err; err = cbs_h264_replace_sps(ctx, unit); if (err < 0) return err; } break; case H264_NAL_SPS_EXT: { err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawSPSExtension), NULL); if (err < 0) return err; err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content); if (err < 0) return err; } break; case H264_NAL_PPS: { H264RawPPS *pps; err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps), &cbs_h264_free_pps); if (err < 0) return err; pps = unit->content; err = cbs_h264_read_pps(ctx, &gbc, pps); if (err < 0) return err; err = cbs_h264_replace_pps(ctx, unit); if (err < 0) return err; } break; case H264_NAL_SLICE: case H264_NAL_IDR_SLICE: case H264_NAL_AUXILIARY_SLICE: { H264RawSlice *slice; int pos, len; err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice), &cbs_h264_free_slice); if (err < 0) return err; slice = unit->content; err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header); if (err < 0) return err; if (!cbs_h2645_read_more_rbsp_data(&gbc)) return AVERROR_INVALIDDATA; pos = get_bits_count(&gbc); len = unit->data_size; slice->data_size = len - pos / 8; slice->data_ref = av_buffer_ref(unit->data_ref); if (!slice->data_ref) return AVERROR(ENOMEM); slice->data = unit->data + pos / 8; slice->data_bit_start = pos % 8; } break; case H264_NAL_AUD: { err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawAUD), NULL); if (err < 0) return err; err = cbs_h264_read_aud(ctx, &gbc, unit->content); if (err < 0) return err; } break; case H264_NAL_SEI: { err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawSEI), &cbs_h264_free_sei); if (err < 0) return err; err = cbs_h264_read_sei(ctx, &gbc, unit->content); if (err < 0) return err; } break; case H264_NAL_FILLER_DATA: { err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawFiller), NULL); if (err < 0) return err; err = cbs_h264_read_filler(ctx, &gbc, unit->content); if (err < 0) return err; } break; case H264_NAL_END_SEQUENCE: case H264_NAL_END_STREAM: { err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H264RawNALUnitHeader), NULL); if (err < 0) return err; err = (unit->type == H264_NAL_END_SEQUENCE ? cbs_h264_read_end_of_sequence : cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content); if (err < 0) return err; } break; default: return AVERROR(ENOSYS); } return 0; } static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit) { GetBitContext gbc; int err; err = init_get_bits(&gbc, unit->data, 8 * unit->data_size); if (err < 0) return err; switch (unit->type) { case HEVC_NAL_VPS: { H265RawVPS *vps; err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*vps), &cbs_h265_free_vps); if (err < 0) return err; vps = unit->content; err = cbs_h265_read_vps(ctx, &gbc, vps); if (err < 0) return err; err = cbs_h265_replace_vps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_SPS: { H265RawSPS *sps; err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*sps), &cbs_h265_free_sps); if (err < 0) return err; sps = unit->content; err = cbs_h265_read_sps(ctx, &gbc, sps); if (err < 0) return err; err = cbs_h265_replace_sps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_PPS: { H265RawPPS *pps; err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*pps), &cbs_h265_free_pps); if (err < 0) return err; pps = unit->content; err = cbs_h265_read_pps(ctx, &gbc, pps); if (err < 0) return err; err = cbs_h265_replace_pps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_TRAIL_N: case HEVC_NAL_TRAIL_R: case HEVC_NAL_TSA_N: case HEVC_NAL_TSA_R: case HEVC_NAL_STSA_N: case HEVC_NAL_STSA_R: case HEVC_NAL_RADL_N: case HEVC_NAL_RADL_R: case HEVC_NAL_RASL_N: case HEVC_NAL_RASL_R: case HEVC_NAL_BLA_W_LP: case HEVC_NAL_BLA_W_RADL: case HEVC_NAL_BLA_N_LP: case HEVC_NAL_IDR_W_RADL: case HEVC_NAL_IDR_N_LP: case HEVC_NAL_CRA_NUT: { H265RawSlice *slice; int pos, len; err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(*slice), &cbs_h265_free_slice); if (err < 0) return err; slice = unit->content; err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header); if (err < 0) return err; if (!cbs_h2645_read_more_rbsp_data(&gbc)) return AVERROR_INVALIDDATA; pos = get_bits_count(&gbc); len = unit->data_size; slice->data_size = len - pos / 8; slice->data_ref = av_buffer_ref(unit->data_ref); if (!slice->data_ref) return AVERROR(ENOMEM); slice->data = unit->data + pos / 8; slice->data_bit_start = pos % 8; } break; case HEVC_NAL_AUD: { err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawAUD), NULL); if (err < 0) return err; err = cbs_h265_read_aud(ctx, &gbc, unit->content); if (err < 0) return err; } break; case HEVC_NAL_SEI_PREFIX: case HEVC_NAL_SEI_SUFFIX: { err = ff_cbs_alloc_unit_content(ctx, unit, sizeof(H265RawSEI), &cbs_h265_free_sei); if (err < 0) return err; err = cbs_h265_read_sei(ctx, &gbc, unit->content, unit->type == HEVC_NAL_SEI_PREFIX); if (err < 0) return err; } break; default: return AVERROR(ENOSYS); } return 0; } static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx, PutBitContext *pbc, const uint8_t *data, size_t data_size, int data_bit_start) { size_t rest = data_size - (data_bit_start + 7) / 8; const uint8_t *pos = data + data_bit_start / 8; av_assert0(data_bit_start >= 0 && data_size > data_bit_start / 8); if (data_size * 8 + 8 > put_bits_left(pbc)) return AVERROR(ENOSPC); if (!rest) goto rbsp_stop_one_bit; // First copy the remaining bits of the first byte // The above check ensures that we do not accidentally // copy beyond the rbsp_stop_one_bit. if (data_bit_start % 8) put_bits(pbc, 8 - data_bit_start % 8, *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8)); if (put_bits_count(pbc) % 8 == 0) { // If the writer is aligned at this point, // memcpy can be used to improve performance. // This happens normally for CABAC. flush_put_bits(pbc); memcpy(put_bits_ptr(pbc), pos, rest); skip_put_bytes(pbc, rest); } else { // If not, we have to copy manually. // rbsp_stop_one_bit forces us to special-case // the last byte. uint8_t temp; int i; for (; rest > 4; rest -= 4, pos += 4) put_bits32(pbc, AV_RB32(pos)); for (; rest > 1; rest--, pos++) put_bits(pbc, 8, *pos); rbsp_stop_one_bit: temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8); av_assert0(temp); i = ff_ctz(*pos); temp = temp >> i; i = rest ? (8 - i) : (8 - i - data_bit_start % 8); put_bits(pbc, i, temp); if (put_bits_count(pbc) % 8) put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0); } return 0; } static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc) { int err; switch (unit->type) { case H264_NAL_SPS: { H264RawSPS *sps = unit->content; err = cbs_h264_write_sps(ctx, pbc, sps); if (err < 0) return err; err = cbs_h264_replace_sps(ctx, unit); if (err < 0) return err; } break; case H264_NAL_SPS_EXT: { H264RawSPSExtension *sps_ext = unit->content; err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext); if (err < 0) return err; } break; case H264_NAL_PPS: { H264RawPPS *pps = unit->content; err = cbs_h264_write_pps(ctx, pbc, pps); if (err < 0) return err; err = cbs_h264_replace_pps(ctx, unit); if (err < 0) return err; } break; case H264_NAL_SLICE: case H264_NAL_IDR_SLICE: case H264_NAL_AUXILIARY_SLICE: { H264RawSlice *slice = unit->content; err = cbs_h264_write_slice_header(ctx, pbc, &slice->header); if (err < 0) return err; if (slice->data) { err = cbs_h2645_write_slice_data(ctx, pbc, slice->data, slice->data_size, slice->data_bit_start); if (err < 0) return err; } else { // No slice data - that was just the header. // (Bitstream may be unaligned!) } } break; case H264_NAL_AUD: { err = cbs_h264_write_aud(ctx, pbc, unit->content); if (err < 0) return err; } break; case H264_NAL_SEI: { err = cbs_h264_write_sei(ctx, pbc, unit->content); if (err < 0) return err; } break; case H264_NAL_FILLER_DATA: { err = cbs_h264_write_filler(ctx, pbc, unit->content); if (err < 0) return err; } break; case H264_NAL_END_SEQUENCE: { err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content); if (err < 0) return err; } break; case H264_NAL_END_STREAM: { err = cbs_h264_write_end_of_stream(ctx, pbc, unit->content); if (err < 0) return err; } break; default: av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for " "NAL unit type %"PRIu32".\n", unit->type); return AVERROR_PATCHWELCOME; } return 0; } static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc) { int err; switch (unit->type) { case HEVC_NAL_VPS: { H265RawVPS *vps = unit->content; err = cbs_h265_write_vps(ctx, pbc, vps); if (err < 0) return err; err = cbs_h265_replace_vps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_SPS: { H265RawSPS *sps = unit->content; err = cbs_h265_write_sps(ctx, pbc, sps); if (err < 0) return err; err = cbs_h265_replace_sps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_PPS: { H265RawPPS *pps = unit->content; err = cbs_h265_write_pps(ctx, pbc, pps); if (err < 0) return err; err = cbs_h265_replace_pps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_TRAIL_N: case HEVC_NAL_TRAIL_R: case HEVC_NAL_TSA_N: case HEVC_NAL_TSA_R: case HEVC_NAL_STSA_N: case HEVC_NAL_STSA_R: case HEVC_NAL_RADL_N: case HEVC_NAL_RADL_R: case HEVC_NAL_RASL_N: case HEVC_NAL_RASL_R: case HEVC_NAL_BLA_W_LP: case HEVC_NAL_BLA_W_RADL: case HEVC_NAL_BLA_N_LP: case HEVC_NAL_IDR_W_RADL: case HEVC_NAL_IDR_N_LP: case HEVC_NAL_CRA_NUT: { H265RawSlice *slice = unit->content; err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header); if (err < 0) return err; if (slice->data) { err = cbs_h2645_write_slice_data(ctx, pbc, slice->data, slice->data_size, slice->data_bit_start); if (err < 0) return err; } else { // No slice data - that was just the header. } } break; case HEVC_NAL_AUD: { err = cbs_h265_write_aud(ctx, pbc, unit->content); if (err < 0) return err; } break; case HEVC_NAL_SEI_PREFIX: case HEVC_NAL_SEI_SUFFIX: { err = cbs_h265_write_sei(ctx, pbc, unit->content, unit->type == HEVC_NAL_SEI_PREFIX); if (err < 0) return err; } break; default: av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for " "NAL unit type %"PRIu32".\n", unit->type); return AVERROR_PATCHWELCOME; } return 0; } static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx, CodedBitstreamFragment *frag) { uint8_t *data; size_t max_size, dp, sp; int err, i, zero_run; for (i = 0; i < frag->nb_units; i++) { // Data should already all have been written when we get here. av_assert0(frag->units[i].data); } max_size = 0; for (i = 0; i < frag->nb_units; i++) { // Start code + content with worst-case emulation prevention. max_size += 4 + frag->units[i].data_size * 3 / 2; } data = av_malloc(max_size + AV_INPUT_BUFFER_PADDING_SIZE); if (!data) return AVERROR(ENOMEM); dp = 0; for (i = 0; i < frag->nb_units; i++) { CodedBitstreamUnit *unit = &frag->units[i]; if (unit->data_bit_padding > 0) { if (i < frag->nb_units - 1) av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid " "unaligned padding on non-final NAL unit.\n"); else frag->data_bit_padding = unit->data_bit_padding; } if ((ctx->codec->codec_id == AV_CODEC_ID_H264 && (unit->type == H264_NAL_SPS || unit->type == H264_NAL_PPS)) || (ctx->codec->codec_id == AV_CODEC_ID_HEVC && (unit->type == HEVC_NAL_VPS || unit->type == HEVC_NAL_SPS || unit->type == HEVC_NAL_PPS)) || i == 0 /* (Assume this is the start of an access unit.) */) { // zero_byte data[dp++] = 0; } // start_code_prefix_one_3bytes data[dp++] = 0; data[dp++] = 0; data[dp++] = 1; zero_run = 0; for (sp = 0; sp < unit->data_size; sp++) { if (zero_run < 2) { if (unit->data[sp] == 0) ++zero_run; else zero_run = 0; } else { if ((unit->data[sp] & ~3) == 0) { // emulation_prevention_three_byte data[dp++] = 3; } zero_run = unit->data[sp] == 0; } data[dp++] = unit->data[sp]; } } av_assert0(dp <= max_size); err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE); if (err) return err; memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE); frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE, NULL, NULL, 0); if (!frag->data_ref) { av_freep(&data); return AVERROR(ENOMEM); } frag->data = data; frag->data_size = dp; return 0; } static void cbs_h264_close(CodedBitstreamContext *ctx) { CodedBitstreamH264Context *h264 = ctx->priv_data; int i; ff_h2645_packet_uninit(&h264->common.read_packet); for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++) av_buffer_unref(&h264->sps_ref[i]); for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++) av_buffer_unref(&h264->pps_ref[i]); } static void cbs_h265_close(CodedBitstreamContext *ctx) { CodedBitstreamH265Context *h265 = ctx->priv_data; int i; ff_h2645_packet_uninit(&h265->common.read_packet); for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++) av_buffer_unref(&h265->vps_ref[i]); for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++) av_buffer_unref(&h265->sps_ref[i]); for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++) av_buffer_unref(&h265->pps_ref[i]); } const CodedBitstreamType ff_cbs_type_h264 = { .codec_id = AV_CODEC_ID_H264, .priv_data_size = sizeof(CodedBitstreamH264Context), .split_fragment = &cbs_h2645_split_fragment, .read_unit = &cbs_h264_read_nal_unit, .write_unit = &cbs_h264_write_nal_unit, .assemble_fragment = &cbs_h2645_assemble_fragment, .close = &cbs_h264_close, }; const CodedBitstreamType ff_cbs_type_h265 = { .codec_id = AV_CODEC_ID_HEVC, .priv_data_size = sizeof(CodedBitstreamH265Context), .split_fragment = &cbs_h2645_split_fragment, .read_unit = &cbs_h265_read_nal_unit, .write_unit = &cbs_h265_write_nal_unit, .assemble_fragment = &cbs_h2645_assemble_fragment, .close = &cbs_h265_close, }; int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx, CodedBitstreamFragment *au, const H264RawSEIPayload *payload) { H264RawSEI *sei; CodedBitstreamUnit *nal = NULL; int err, i; // Find an existing SEI NAL unit to add to. for (i = 0; i < au->nb_units; i++) { if (au->units[i].type == H264_NAL_SEI) { nal = &au->units[i]; break; } } if (nal) { sei = nal->content; } else { // Need to make a new SEI NAL unit. Insert it before the first // slice data NAL unit; if no slice data, add at the end. AVBufferRef *sei_ref; sei = av_mallocz(sizeof(*sei)); if (!sei) return AVERROR(ENOMEM); sei->nal_unit_header.nal_unit_type = H264_NAL_SEI; sei->nal_unit_header.nal_ref_idc = 0; sei_ref = av_buffer_create((uint8_t*)sei, sizeof(*sei), &cbs_h264_free_sei, ctx, 0); if (!sei_ref) { av_freep(&sei); return AVERROR(ENOMEM); } for (i = 0; i < au->nb_units; i++) { if (au->units[i].type == H264_NAL_SLICE || au->units[i].type == H264_NAL_IDR_SLICE) break; } err = ff_cbs_insert_unit_content(ctx, au, i, H264_NAL_SEI, sei, sei_ref); av_buffer_unref(&sei_ref); if (err < 0) return err; } if (sei->payload_count >= H264_MAX_SEI_PAYLOADS) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in " "SEI NAL unit.\n"); return AVERROR(EINVAL); } memcpy(&sei->payload[sei->payload_count], payload, sizeof(*payload)); ++sei->payload_count; return 0; } void ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx, CodedBitstreamFragment *au, CodedBitstreamUnit *nal, int position) { H264RawSEI *sei = nal->content; av_assert0(nal->type == H264_NAL_SEI); av_assert0(position >= 0 && position < sei->payload_count); if (position == 0 && sei->payload_count == 1) { // Deleting NAL unit entirely. int i; for (i = 0; i < au->nb_units; i++) { if (&au->units[i] == nal) break; } ff_cbs_delete_unit(ctx, au, i); } else { cbs_h264_free_sei_payload(&sei->payload[position]); --sei->payload_count; memmove(sei->payload + position, sei->payload + position + 1, (sei->payload_count - position) * sizeof(*sei->payload)); } }