diff options
Diffstat (limited to 'ffmpeg/libavformat/rtpdec_h263_rfc2190.c')
| -rw-r--r-- | ffmpeg/libavformat/rtpdec_h263_rfc2190.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/ffmpeg/libavformat/rtpdec_h263_rfc2190.c b/ffmpeg/libavformat/rtpdec_h263_rfc2190.c deleted file mode 100644 index a227901..0000000 --- a/ffmpeg/libavformat/rtpdec_h263_rfc2190.c +++ /dev/null @@ -1,215 +0,0 @@ -/* - * RTP H.263 Depacketizer, RFC 2190 - * Copyright (c) 2012 Martin Storsjo - * Based on the GStreamer H.263 Depayloder: - * Copyright 2005 Wim Taymans - * Copyright 2007 Edward Hervey - * Copyright 2007 Nokia Corporation - * Copyright 2007 Collabora Ltd, Philippe Kalaf - * Copyright 2010 Mark Nauwelaerts - * - * 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/attributes.h" -#include "libavutil/intreadwrite.h" -#include "libavcodec/get_bits.h" - -struct PayloadContext { - AVIOContext *buf; - uint8_t endbyte; - int endbyte_bits; - uint32_t timestamp; - int newformat; -}; - -static PayloadContext *h263_new_context(void) -{ - return av_mallocz(sizeof(PayloadContext)); -} - -static void h263_free_context(PayloadContext *data) -{ - if (!data) - return; - if (data->buf) { - uint8_t *p; - avio_close_dyn_buf(data->buf, &p); - av_free(p); - } - av_free(data); -} - -static av_cold 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; -} - -static int 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) -{ - /* Corresponding to header fields in the RFC */ - int f, p, i, sbit, ebit, src, r; - int header_size, ret; - - if (data->newformat) - return ff_h263_handle_packet(ctx, data, st, pkt, timestamp, buf, len, - seq, flags); - - if (data->buf && data->timestamp != *timestamp) { - /* Dropping old buffered, unfinished data */ - uint8_t *p; - avio_close_dyn_buf(data->buf, &p); - av_free(p); - data->buf = NULL; - } - - if (len < 4) { - av_log(ctx, AV_LOG_ERROR, "Too short H.263 RTP packet: %d\n", len); - return AVERROR_INVALIDDATA; - } - - f = buf[0] & 0x80; - p = buf[0] & 0x40; - if (!f) { - /* Mode A */ - header_size = 4; - i = buf[1] & 0x10; - r = ((buf[1] & 0x01) << 3) | ((buf[2] & 0xe0) >> 5); - } else if (!p) { - /* Mode B */ - header_size = 8; - if (len < header_size) { - av_log(ctx, AV_LOG_ERROR, - "Too short H.263 RTP packet: %d bytes, %d header bytes\n", - len, header_size); - return AVERROR_INVALIDDATA; - } - r = buf[3] & 0x03; - i = buf[4] & 0x80; - } else { - /* Mode C */ - header_size = 12; - if (len < header_size) { - av_log(ctx, AV_LOG_ERROR, - "Too short H.263 RTP packet: %d bytes, %d header bytes\n", - len, header_size); - return AVERROR_INVALIDDATA; - } - r = buf[3] & 0x03; - i = buf[4] & 0x80; - } - sbit = (buf[0] >> 3) & 0x7; - ebit = buf[0] & 0x7; - src = (buf[1] & 0xe0) >> 5; - if (!(buf[0] & 0xf8)) { /* Reserved bits in RFC 2429/4629 are zero */ - if ((src == 0 || src >= 6) && r) { - /* Invalid src for this format, and bits that should be zero - * according to RFC 2190 aren't zero. */ - av_log(ctx, AV_LOG_WARNING, - "Interpreting H263 RTP data as RFC 2429/4629 even though " - "signalled with a static payload type.\n"); - data->newformat = 1; - return ff_h263_handle_packet(ctx, data, st, pkt, timestamp, buf, - len, seq, flags); - } - } - - buf += header_size; - len -= header_size; - - if (!data->buf) { - /* Check the picture start code, only start buffering a new frame - * if this is correct */ - if (len > 4 && AV_RB32(buf) >> 10 == 0x20) { - ret = avio_open_dyn_buf(&data->buf); - if (ret < 0) - return ret; - data->timestamp = *timestamp; - } else { - /* Frame not started yet, skipping */ - return AVERROR(EAGAIN); - } - } - - if (data->endbyte_bits || sbit) { - if (data->endbyte_bits == sbit) { - data->endbyte |= buf[0] & (0xff >> sbit); - data->endbyte_bits = 0; - buf++; - len--; - avio_w8(data->buf, data->endbyte); - } else { - /* Start/end skip bits not matching - missed packets? */ - GetBitContext gb; - init_get_bits(&gb, buf, len*8 - ebit); - skip_bits(&gb, sbit); - if (data->endbyte_bits) { - data->endbyte |= get_bits(&gb, 8 - data->endbyte_bits); - avio_w8(data->buf, data->endbyte); - } - while (get_bits_left(&gb) >= 8) - avio_w8(data->buf, get_bits(&gb, 8)); - data->endbyte_bits = get_bits_left(&gb); - if (data->endbyte_bits) - data->endbyte = get_bits(&gb, data->endbyte_bits) << - (8 - data->endbyte_bits); - ebit = 0; - len = 0; - } - } - if (ebit) { - if (len > 0) - avio_write(data->buf, buf, len - 1); - data->endbyte_bits = 8 - ebit; - data->endbyte = buf[len - 1] & (0xff << ebit); - } else { - avio_write(data->buf, buf, len); - } - - if (!(flags & RTP_FLAG_MARKER)) - return AVERROR(EAGAIN); - - if (data->endbyte_bits) - avio_w8(data->buf, data->endbyte); - data->endbyte_bits = 0; - - ret = ff_rtp_finalize_packet(pkt, &data->buf, st->index); - if (ret < 0) - return ret; - if (!i) - pkt->flags |= AV_PKT_FLAG_KEY; - - return 0; -} - -RTPDynamicProtocolHandler ff_h263_rfc2190_dynamic_handler = { - .codec_type = AVMEDIA_TYPE_VIDEO, - .codec_id = AV_CODEC_ID_H263, - .init = h263_init, - .parse_packet = h263_handle_packet, - .alloc = h263_new_context, - .free = h263_free_context, - .static_payload_id = 34, -}; |