diff options
Diffstat (limited to 'ffmpeg1/libavformat/rtpdec_h263.c')
| -rw-r--r-- | ffmpeg1/libavformat/rtpdec_h263.c | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/ffmpeg1/libavformat/rtpdec_h263.c b/ffmpeg1/libavformat/rtpdec_h263.c deleted file mode 100644 index dd7aa60..0000000 --- a/ffmpeg1/libavformat/rtpdec_h263.c +++ /dev/null @@ -1,113 +0,0 @@ -/* - * RTP H.263 Depacketizer, RFC 4629 - * Copyright (c) 2010 Martin Storsjo - * - * 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 "avformat.h" -#include "rtpdec_formats.h" -#include "libavutil/intreadwrite.h" - -static int h263_init(AVFormatContext *ctx, int st_index, PayloadContext *data) -{ - if (st_index < 0) - return 0; - ctx->streams[st_index]->need_parsing = AVSTREAM_PARSE_FULL; - return 0; -} - -int ff_h263_handle_packet(AVFormatContext *ctx, PayloadContext *data, - AVStream *st, AVPacket *pkt, uint32_t *timestamp, - const uint8_t *buf, int len, uint16_t seq, int flags) -{ - uint8_t *ptr; - uint16_t header; - int startcode, vrc, picture_header; - - if (len < 2) { - av_log(ctx, AV_LOG_ERROR, "Too short H.263 RTP packet\n"); - return AVERROR_INVALIDDATA; - } - - /* Decode the 16 bit H.263+ payload header, as described in section - * 5.1 of RFC 4629. The fields of this header are: - * - 5 reserved bits, should be ignored. - * - One bit (P, startcode), indicating a picture start, picture segment - * start or video sequence end. If set, two zero bytes should be - * prepended to the payload. - * - One bit (V, vrc), indicating the presence of an 8 bit Video - * Redundancy Coding field after this 16 bit header. - * - 6 bits (PLEN, picture_header), the length (in bytes) of an extra - * picture header, following the VRC field. - * - 3 bits (PEBIT), the number of bits to ignore of the last byte - * of the extra picture header. (Not used at the moment.) - */ - header = AV_RB16(buf); - startcode = (header & 0x0400) >> 9; - vrc = header & 0x0200; - picture_header = (header & 0x01f8) >> 3; - buf += 2; - len -= 2; - - if (vrc) { - /* Skip VRC header if present, not used at the moment. */ - buf += 1; - len -= 1; - } - if (picture_header) { - /* Skip extra picture header if present, not used at the moment. */ - buf += picture_header; - len -= picture_header; - } - - if (len < 0) { - av_log(ctx, AV_LOG_ERROR, "Too short H.263 RTP packet\n"); - return AVERROR_INVALIDDATA; - } - - if (av_new_packet(pkt, len + startcode)) { - av_log(ctx, AV_LOG_ERROR, "Out of memory\n"); - return AVERROR(ENOMEM); - } - pkt->stream_index = st->index; - ptr = pkt->data; - - if (startcode) { - *ptr++ = 0; - *ptr++ = 0; - } - memcpy(ptr, buf, len); - - return 0; -} - -RTPDynamicProtocolHandler ff_h263_1998_dynamic_handler = { - .enc_name = "H263-1998", - .codec_type = AVMEDIA_TYPE_VIDEO, - .codec_id = AV_CODEC_ID_H263, - .init = h263_init, - .parse_packet = ff_h263_handle_packet, -}; - -RTPDynamicProtocolHandler ff_h263_2000_dynamic_handler = { - .enc_name = "H263-2000", - .codec_type = AVMEDIA_TYPE_VIDEO, - .codec_id = AV_CODEC_ID_H263, - .init = h263_init, - .parse_packet = ff_h263_handle_packet, -}; |