bb4a310bb8
This makes it more consistent with depacketizers that don't have any .free function at all, where the payload context is freed by the surrounding framework. Always free the context in the surrounding framework, having the individual depacketizers only free any data they've specifically allocated themselves. This is similar to how this works for demuxer/muxers/codecs - a component shouldn't free the priv_data that the framework has allocated for it. Signed-off-by: Martin Storsjö <martin@martin.st>
129 lines
3.8 KiB
C
129 lines
3.8 KiB
C
/*
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* Sorenson-3 (SVQ3/SV3V) payload for RTP
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* Copyright (c) 2010 Ronald S. Bultje
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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* @brief RTP support for the SV3V (SVQ3) payload
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* @author Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* @see http://wiki.multimedia.cx/index.php?title=Sorenson_Video_3#Packetization
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*/
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#include <string.h>
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#include "libavutil/intreadwrite.h"
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#include "rtp.h"
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#include "rtpdec.h"
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#include "rtpdec_formats.h"
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struct PayloadContext {
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AVIOContext *pktbuf;
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int64_t timestamp;
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};
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/** return 0 on packet, <0 on partial packet or error... */
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static int svq3_parse_packet (AVFormatContext *s, PayloadContext *sv,
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AVStream *st, AVPacket *pkt,
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uint32_t *timestamp,
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const uint8_t *buf, int len, uint16_t seq,
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int flags)
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{
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int config_packet, start_packet, end_packet;
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if (len < 2)
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return AVERROR_INVALIDDATA;
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config_packet = buf[0] & 0x40;
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start_packet = buf[0] & 0x20;
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end_packet = buf[0] & 0x10;
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buf += 2; // ignore buf[1]
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len -= 2;
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if (config_packet) {
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av_freep(&st->codec->extradata);
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st->codec->extradata_size = 0;
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if (len < 2 || !(st->codec->extradata =
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av_malloc(len + 8 + FF_INPUT_BUFFER_PADDING_SIZE)))
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return AVERROR_INVALIDDATA;
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st->codec->extradata_size = len + 8;
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memcpy(st->codec->extradata, "SEQH", 4);
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AV_WB32(st->codec->extradata + 4, len);
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memcpy(st->codec->extradata + 8, buf, len);
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/* We set codec_id to AV_CODEC_ID_NONE initially to
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* delay decoder initialization since extradata is
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* carried within the RTP stream, not SDP. Here,
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* by setting codec_id to AV_CODEC_ID_SVQ3, we are signalling
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* to the decoder that it is OK to initialize. */
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st->codec->codec_id = AV_CODEC_ID_SVQ3;
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return AVERROR(EAGAIN);
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}
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if (start_packet) {
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int res;
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if (sv->pktbuf) {
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uint8_t *tmp;
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avio_close_dyn_buf(sv->pktbuf, &tmp);
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av_free(tmp);
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}
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if ((res = avio_open_dyn_buf(&sv->pktbuf)) < 0)
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return res;
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sv->timestamp = *timestamp;
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}
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if (!sv->pktbuf)
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return AVERROR_INVALIDDATA;
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avio_write(sv->pktbuf, buf, len);
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if (end_packet) {
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int ret = ff_rtp_finalize_packet(pkt, &sv->pktbuf, st->index);
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if (ret < 0)
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return ret;
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*timestamp = sv->timestamp;
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return 0;
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}
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return AVERROR(EAGAIN);
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}
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static void svq3_extradata_free(PayloadContext *sv)
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{
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if (sv->pktbuf) {
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uint8_t *buf;
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avio_close_dyn_buf(sv->pktbuf, &buf);
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av_free(buf);
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}
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}
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RTPDynamicProtocolHandler ff_svq3_dynamic_handler = {
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.enc_name = "X-SV3V-ES",
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.codec_type = AVMEDIA_TYPE_VIDEO,
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.codec_id = AV_CODEC_ID_NONE, // see if (config_packet) above
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.priv_data_size = sizeof(PayloadContext),
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.free = svq3_extradata_free,
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.parse_packet = svq3_parse_packet,
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};
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