mirror of https://github.com/FFmpeg/FFmpeg.git
Matthieu Bouron
8 years ago
parent
b82c1a377a
commit
140da8e810
10 changed files with 373 additions and 34 deletions
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/*
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "bytestream.h" |
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#include "h2645_parse.h" |
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#include "hevc.h" |
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#include "hevc_parse.h" |
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static int hevc_decode_nal_units(const uint8_t *buf, int buf_size, HEVCParamSets *ps, |
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int is_nalff, int nal_length_size, void *logctx) |
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{ |
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int i; |
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int ret = 0; |
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H2645Packet pkt = { 0 }; |
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ret = ff_h2645_packet_split(&pkt, buf, buf_size, logctx, is_nalff, nal_length_size, AV_CODEC_ID_HEVC, 1); |
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if (ret < 0) { |
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goto done; |
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} |
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for (i = 0; i < pkt.nb_nals; i++) { |
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H2645NAL *nal = &pkt.nals[i]; |
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/* ignore everything except parameter sets and VCL NALUs */ |
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switch (nal->type) { |
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case NAL_VPS: ff_hevc_decode_nal_vps(&nal->gb, logctx, ps); break; |
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case NAL_SPS: ff_hevc_decode_nal_sps(&nal->gb, logctx, ps, 1); break; |
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case NAL_PPS: ff_hevc_decode_nal_pps(&nal->gb, logctx, ps); break; |
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case NAL_TRAIL_R: |
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case NAL_TRAIL_N: |
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case NAL_TSA_N: |
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case NAL_TSA_R: |
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case NAL_STSA_N: |
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case NAL_STSA_R: |
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case NAL_BLA_W_LP: |
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case NAL_BLA_W_RADL: |
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case NAL_BLA_N_LP: |
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case NAL_IDR_W_RADL: |
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case NAL_IDR_N_LP: |
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case NAL_CRA_NUT: |
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case NAL_RADL_N: |
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case NAL_RADL_R: |
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case NAL_RASL_N: |
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case NAL_RASL_R: |
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av_log(logctx, AV_LOG_ERROR, "Invalid NAL unit: %d\n", nal->type); |
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ret = AVERROR_INVALIDDATA; |
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goto done; |
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break; |
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} |
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} |
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done: |
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ff_h2645_packet_uninit(&pkt); |
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return ret; |
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} |
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int ff_hevc_decode_extradata(const uint8_t *data, int size, HEVCParamSets *ps, |
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int *is_nalff, int *nal_length_size, |
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int err_recognition, void *logctx) |
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{ |
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int ret = 0; |
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GetByteContext gb; |
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bytestream2_init(&gb, data, size); |
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if (size > 3 && (data[0] || data[1] || data[2] > 1)) { |
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/* It seems the extradata is encoded as hvcC format.
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* Temporarily, we support configurationVersion==0 until 14496-15 3rd |
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* is finalized. When finalized, configurationVersion will be 1 and we |
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* can recognize hvcC by checking if avctx->extradata[0]==1 or not. */ |
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int i, j, num_arrays, nal_len_size; |
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*is_nalff = 1; |
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bytestream2_skip(&gb, 21); |
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nal_len_size = (bytestream2_get_byte(&gb) & 3) + 1; |
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num_arrays = bytestream2_get_byte(&gb); |
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/* nal units in the hvcC always have length coded with 2 bytes,
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* so put a fake nal_length_size = 2 while parsing them */ |
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*nal_length_size = 2; |
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/* Decode nal units from hvcC. */ |
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for (i = 0; i < num_arrays; i++) { |
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int type = bytestream2_get_byte(&gb) & 0x3f; |
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int cnt = bytestream2_get_be16(&gb); |
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for (j = 0; j < cnt; j++) { |
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// +2 for the nal size field
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int nalsize = bytestream2_peek_be16(&gb) + 2; |
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if (bytestream2_get_bytes_left(&gb) < nalsize) { |
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av_log(logctx, AV_LOG_ERROR, |
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"Invalid NAL unit size in extradata.\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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ret = hevc_decode_nal_units(gb.buffer, nalsize, ps, *is_nalff, *nal_length_size, logctx); |
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if (ret < 0) { |
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av_log(logctx, AV_LOG_ERROR, |
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"Decoding nal unit %d %d from hvcC failed\n", |
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type, i); |
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return ret; |
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} |
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bytestream2_skip(&gb, nalsize); |
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} |
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} |
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/* Now store right nal length size, that will be used to parse
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* all other nals */ |
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*nal_length_size = nal_len_size; |
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} else { |
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*is_nalff = 0; |
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ret = hevc_decode_nal_units(data, size, ps, *is_nalff, *nal_length_size, logctx); |
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if (ret < 0) |
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return ret; |
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} |
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return ret; |
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} |
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@ -0,0 +1,33 @@ |
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/*
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* H.265 parser code |
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*/ |
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#ifndef AVCODEC_HEVC_PARSE_H |
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#define AVCODEC_HEVC_PARSE_H |
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#include "hevc.h" |
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int ff_hevc_decode_extradata(const uint8_t *data, int size, HEVCParamSets *ps, |
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int *is_nalff, int *nal_length_size, |
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int err_recognition, void *logctx); |
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#endif /* AVCODEC_HEVC_PARSE_H */ |
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