diff options
Diffstat (limited to 'ffmpeg1/libavcodec/h264_mp4toannexb_bsf.c')
| -rw-r--r-- | ffmpeg1/libavcodec/h264_mp4toannexb_bsf.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/ffmpeg1/libavcodec/h264_mp4toannexb_bsf.c b/ffmpeg1/libavcodec/h264_mp4toannexb_bsf.c deleted file mode 100644 index 2dea933..0000000 --- a/ffmpeg1/libavcodec/h264_mp4toannexb_bsf.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * H.264 MP4 to Annex B byte stream format filter - * Copyright (c) 2007 Benoit Fouet <benoit.fouet@free.fr> - * - * 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 <string.h> - -#include "libavutil/intreadwrite.h" -#include "libavutil/mem.h" -#include "avcodec.h" - -typedef struct H264BSFContext { - uint8_t length_size; - uint8_t first_idr; - int extradata_parsed; -} H264BSFContext; - -static int alloc_and_copy(uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *sps_pps, uint32_t sps_pps_size, - const uint8_t *in, uint32_t in_size) { - uint32_t offset = *poutbuf_size; - uint8_t nal_header_size = offset ? 3 : 4; - void *tmp; - - *poutbuf_size += sps_pps_size+in_size+nal_header_size; - tmp = av_realloc(*poutbuf, *poutbuf_size); - if (!tmp) - return AVERROR(ENOMEM); - *poutbuf = tmp; - if (sps_pps) - memcpy(*poutbuf+offset, sps_pps, sps_pps_size); - memcpy(*poutbuf+sps_pps_size+nal_header_size+offset, in, in_size); - if (!offset) { - AV_WB32(*poutbuf+sps_pps_size, 1); - } else { - (*poutbuf+offset+sps_pps_size)[0] = (*poutbuf+offset+sps_pps_size)[1] = 0; - (*poutbuf+offset+sps_pps_size)[2] = 1; - } - - return 0; -} - -static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc, - AVCodecContext *avctx, const char *args, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size, - int keyframe) { - H264BSFContext *ctx = bsfc->priv_data; - int i; - uint8_t unit_type; - int32_t nal_size; - uint32_t cumul_size = 0; - const uint8_t *buf_end = buf + buf_size; - int ret = AVERROR(EINVAL); - - /* nothing to filter */ - if (!avctx->extradata || avctx->extradata_size < 6) { - *poutbuf = (uint8_t*) buf; - *poutbuf_size = buf_size; - return 0; - } - - /* retrieve sps and pps NAL units from extradata */ - if (!ctx->extradata_parsed) { - uint16_t unit_size; - uint64_t total_size = 0; - uint8_t *out = NULL, unit_nb, sps_done = 0, sps_seen = 0, pps_seen = 0; - const uint8_t *extradata = avctx->extradata+4; - static const uint8_t nalu_header[4] = {0, 0, 0, 1}; - - /* retrieve length coded size */ - ctx->length_size = (*extradata++ & 0x3) + 1; - - /* retrieve sps and pps unit(s) */ - unit_nb = *extradata++ & 0x1f; /* number of sps unit(s) */ - if (!unit_nb) { - goto pps; - } else { - sps_seen = 1; - } - - while (unit_nb--) { - void *tmp; - - unit_size = AV_RB16(extradata); - total_size += unit_size+4; - if (total_size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE || - extradata+2+unit_size > avctx->extradata+avctx->extradata_size) { - av_free(out); - return AVERROR(EINVAL); - } - tmp = av_realloc(out, total_size + FF_INPUT_BUFFER_PADDING_SIZE); - if (!tmp) { - av_free(out); - return AVERROR(ENOMEM); - } - out = tmp; - memcpy(out+total_size-unit_size-4, nalu_header, 4); - memcpy(out+total_size-unit_size, extradata+2, unit_size); - extradata += 2+unit_size; -pps: - if (!unit_nb && !sps_done++) { - unit_nb = *extradata++; /* number of pps unit(s) */ - if (unit_nb) - pps_seen = 1; - } - } - - if(out) - memset(out + total_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); - - if (!sps_seen) - av_log(avctx, AV_LOG_WARNING, "Warning: SPS NALU missing or invalid. The resulting stream may not play.\n"); - if (!pps_seen) - av_log(avctx, AV_LOG_WARNING, "Warning: PPS NALU missing or invalid. The resulting stream may not play.\n"); - - av_free(avctx->extradata); - avctx->extradata = out; - avctx->extradata_size = total_size; - ctx->first_idr = 1; - ctx->extradata_parsed = 1; - } - - *poutbuf_size = 0; - *poutbuf = NULL; - do { - ret= AVERROR(EINVAL); - if (buf + ctx->length_size > buf_end) - goto fail; - - for (nal_size = 0, i = 0; i<ctx->length_size; i++) - nal_size = (nal_size << 8) | buf[i]; - - buf += ctx->length_size; - unit_type = *buf & 0x1f; - - if (buf + nal_size > buf_end || nal_size < 0) - goto fail; - - /* prepend only to the first type 5 NAL unit of an IDR picture */ - if (ctx->first_idr && unit_type == 5) { - if ((ret=alloc_and_copy(poutbuf, poutbuf_size, - avctx->extradata, avctx->extradata_size, - buf, nal_size)) < 0) - goto fail; - ctx->first_idr = 0; - } else { - if ((ret=alloc_and_copy(poutbuf, poutbuf_size, - NULL, 0, - buf, nal_size)) < 0) - goto fail; - if (!ctx->first_idr && unit_type == 1) - ctx->first_idr = 1; - } - - buf += nal_size; - cumul_size += nal_size + ctx->length_size; - } while (cumul_size < buf_size); - - return 1; - -fail: - av_freep(poutbuf); - *poutbuf_size = 0; - return ret; -} - -AVBitStreamFilter ff_h264_mp4toannexb_bsf = { - "h264_mp4toannexb", - sizeof(H264BSFContext), - h264_mp4toannexb_filter, -}; |