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Diffstat (limited to 'ffmpeg/libavformat/rtpdec_asf.c')
-rw-r--r--ffmpeg/libavformat/rtpdec_asf.c307
1 files changed, 0 insertions, 307 deletions
diff --git a/ffmpeg/libavformat/rtpdec_asf.c b/ffmpeg/libavformat/rtpdec_asf.c
deleted file mode 100644
index 123894f..0000000
--- a/ffmpeg/libavformat/rtpdec_asf.c
+++ /dev/null
@@ -1,307 +0,0 @@
-/*
- * Microsoft RTP/ASF support.
- * Copyright (c) 2008 Ronald S. Bultje
- *
- * 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
- */
-
-/**
- * @file
- * @brief Microsoft RTP/ASF support
- * @author Ronald S. Bultje <rbultje@ronald.bitfreak.net>
- */
-
-#include "libavutil/base64.h"
-#include "libavutil/avstring.h"
-#include "libavutil/intreadwrite.h"
-#include "rtp.h"
-#include "rtpdec_formats.h"
-#include "rtsp.h"
-#include "asf.h"
-#include "avio_internal.h"
-#include "internal.h"
-
-/**
- * From MSDN 2.2.1.4, we learn that ASF data packets over RTP should not
- * contain any padding. Unfortunately, the header min/max_pktsize are not
- * updated (thus making min_pktsize invalid). Here, we "fix" these faulty
- * min_pktsize values in the ASF file header.
- * @return 0 on success, <0 on failure (currently -1).
- */
-static int rtp_asf_fix_header(uint8_t *buf, int len)
-{
- uint8_t *p = buf, *end = buf + len;
-
- if (len < sizeof(ff_asf_guid) * 2 + 22 ||
- memcmp(p, ff_asf_header, sizeof(ff_asf_guid))) {
- return -1;
- }
- p += sizeof(ff_asf_guid) + 14;
- do {
- uint64_t chunksize = AV_RL64(p + sizeof(ff_asf_guid));
- if (memcmp(p, ff_asf_file_header, sizeof(ff_asf_guid))) {
- if (chunksize > end - p)
- return -1;
- p += chunksize;
- continue;
- }
-
- /* skip most of the file header, to min_pktsize */
- p += 6 * 8 + 3 * 4 + sizeof(ff_asf_guid) * 2;
- if (p + 8 <= end && AV_RL32(p) == AV_RL32(p + 4)) {
- /* and set that to zero */
- AV_WL32(p, 0);
- return 0;
- }
- break;
- } while (end - p >= sizeof(ff_asf_guid) + 8);
-
- return -1;
-}
-
-/**
- * The following code is basically a buffered AVIOContext,
- * with the added benefit of returning -EAGAIN (instead of 0)
- * on packet boundaries, such that the ASF demuxer can return
- * safely and resume business at the next packet.
- */
-static int packetizer_read(void *opaque, uint8_t *buf, int buf_size)
-{
- return AVERROR(EAGAIN);
-}
-
-static void init_packetizer(AVIOContext *pb, uint8_t *buf, int len)
-{
- ffio_init_context(pb, buf, len, 0, NULL, packetizer_read, NULL, NULL);
-
- /* this "fills" the buffer with its current content */
- pb->pos = len;
- pb->buf_end = buf + len;
-}
-
-int ff_wms_parse_sdp_a_line(AVFormatContext *s, const char *p)
-{
- int ret = 0;
- if (av_strstart(p, "pgmpu:data:application/vnd.ms.wms-hdr.asfv1;base64,", &p)) {
- AVIOContext pb;
- RTSPState *rt = s->priv_data;
- AVDictionary *opts = NULL;
- int len = strlen(p) * 6 / 8;
- char *buf = av_mallocz(len);
- av_base64_decode(buf, p, len);
-
- if (rtp_asf_fix_header(buf, len) < 0)
- av_log(s, AV_LOG_ERROR,
- "Failed to fix invalid RTSP-MS/ASF min_pktsize\n");
- init_packetizer(&pb, buf, len);
- if (rt->asf_ctx) {
- avformat_close_input(&rt->asf_ctx);
- }
- if (!(rt->asf_ctx = avformat_alloc_context()))
- return AVERROR(ENOMEM);
- rt->asf_ctx->pb = &pb;
- av_dict_set(&opts, "no_resync_search", "1", 0);
- ret = avformat_open_input(&rt->asf_ctx, "", &ff_asf_demuxer, &opts);
- av_dict_free(&opts);
- if (ret < 0)
- return ret;
- av_dict_copy(&s->metadata, rt->asf_ctx->metadata, 0);
- rt->asf_pb_pos = avio_tell(&pb);
- av_free(buf);
- rt->asf_ctx->pb = NULL;
- }
- return ret;
-}
-
-static int asfrtp_parse_sdp_line(AVFormatContext *s, int stream_index,
- PayloadContext *asf, const char *line)
-{
- if (stream_index < 0)
- return 0;
- if (av_strstart(line, "stream:", &line)) {
- RTSPState *rt = s->priv_data;
-
- s->streams[stream_index]->id = strtol(line, NULL, 10);
-
- if (rt->asf_ctx) {
- int i;
-
- for (i = 0; i < rt->asf_ctx->nb_streams; i++) {
- if (s->streams[stream_index]->id == rt->asf_ctx->streams[i]->id) {
- *s->streams[stream_index]->codec =
- *rt->asf_ctx->streams[i]->codec;
- rt->asf_ctx->streams[i]->codec->extradata_size = 0;
- rt->asf_ctx->streams[i]->codec->extradata = NULL;
- avpriv_set_pts_info(s->streams[stream_index], 32, 1, 1000);
- }
- }
- }
- }
-
- return 0;
-}
-
-struct PayloadContext {
- AVIOContext *pktbuf, pb;
- uint8_t *buf;
-};
-
-/**
- * @return 0 when a packet was written into /p pkt, and no more data is left;
- * 1 when a packet was written into /p pkt, and more packets might be left;
- * <0 when not enough data was provided to return a full packet, or on error.
- */
-static int asfrtp_parse_packet(AVFormatContext *s, PayloadContext *asf,
- AVStream *st, AVPacket *pkt,
- uint32_t *timestamp,
- const uint8_t *buf, int len, uint16_t seq,
- int flags)
-{
- AVIOContext *pb = &asf->pb;
- int res, mflags, len_off;
- RTSPState *rt = s->priv_data;
-
- if (!rt->asf_ctx)
- return -1;
-
- if (len > 0) {
- int off, out_len = 0;
-
- if (len < 4)
- return -1;
-
- av_freep(&asf->buf);
-
- ffio_init_context(pb, buf, len, 0, NULL, NULL, NULL, NULL);
-
- while (avio_tell(pb) + 4 < len) {
- int start_off = avio_tell(pb);
-
- mflags = avio_r8(pb);
- if (mflags & 0x80)
- flags |= RTP_FLAG_KEY;
- len_off = avio_rb24(pb);
- if (mflags & 0x20) /**< relative timestamp */
- avio_skip(pb, 4);
- if (mflags & 0x10) /**< has duration */
- avio_skip(pb, 4);
- if (mflags & 0x8) /**< has location ID */
- avio_skip(pb, 4);
- off = avio_tell(pb);
-
- if (!(mflags & 0x40)) {
- /**
- * If 0x40 is not set, the len_off field specifies an offset
- * of this packet's payload data in the complete (reassembled)
- * ASF packet. This is used to spread one ASF packet over
- * multiple RTP packets.
- */
- if (asf->pktbuf && len_off != avio_tell(asf->pktbuf)) {
- uint8_t *p;
- avio_close_dyn_buf(asf->pktbuf, &p);
- asf->pktbuf = NULL;
- av_free(p);
- }
- if (!len_off && !asf->pktbuf &&
- (res = avio_open_dyn_buf(&asf->pktbuf)) < 0)
- return res;
- if (!asf->pktbuf)
- return AVERROR(EIO);
-
- avio_write(asf->pktbuf, buf + off, len - off);
- avio_skip(pb, len - off);
- if (!(flags & RTP_FLAG_MARKER))
- return -1;
- out_len = avio_close_dyn_buf(asf->pktbuf, &asf->buf);
- asf->pktbuf = NULL;
- } else {
- /**
- * If 0x40 is set, the len_off field specifies the length of
- * the next ASF packet that can be read from this payload
- * data alone. This is commonly the same as the payload size,
- * but could be less in case of packet splitting (i.e.
- * multiple ASF packets in one RTP packet).
- */
-
- int cur_len = start_off + len_off - off;
- int prev_len = out_len;
- out_len += cur_len;
- if (FFMIN(cur_len, len - off) < 0)
- return -1;
- if ((res = av_reallocp(&asf->buf, out_len)) < 0)
- return res;
- memcpy(asf->buf + prev_len, buf + off,
- FFMIN(cur_len, len - off));
- avio_skip(pb, cur_len);
- }
- }
-
- init_packetizer(pb, asf->buf, out_len);
- pb->pos += rt->asf_pb_pos;
- pb->eof_reached = 0;
- rt->asf_ctx->pb = pb;
- }
-
- for (;;) {
- int i;
-
- res = ff_read_packet(rt->asf_ctx, pkt);
- rt->asf_pb_pos = avio_tell(pb);
- if (res != 0)
- break;
- for (i = 0; i < s->nb_streams; i++) {
- if (s->streams[i]->id == rt->asf_ctx->streams[pkt->stream_index]->id) {
- pkt->stream_index = i;
- return 1; // FIXME: return 0 if last packet
- }
- }
- av_free_packet(pkt);
- }
-
- return res == 1 ? -1 : res;
-}
-
-static PayloadContext *asfrtp_new_context(void)
-{
- return av_mallocz(sizeof(PayloadContext));
-}
-
-static void asfrtp_free_context(PayloadContext *asf)
-{
- if (asf->pktbuf) {
- uint8_t *p = NULL;
- avio_close_dyn_buf(asf->pktbuf, &p);
- asf->pktbuf = NULL;
- av_free(p);
- }
- av_freep(&asf->buf);
- av_free(asf);
-}
-
-#define RTP_ASF_HANDLER(n, s, t) \
-RTPDynamicProtocolHandler ff_ms_rtp_ ## n ## _handler = { \
- .enc_name = s, \
- .codec_type = t, \
- .codec_id = AV_CODEC_ID_NONE, \
- .parse_sdp_a_line = asfrtp_parse_sdp_line, \
- .alloc = asfrtp_new_context, \
- .free = asfrtp_free_context, \
- .parse_packet = asfrtp_parse_packet, \
-}
-
-RTP_ASF_HANDLER(asf_pfv, "x-asf-pf", AVMEDIA_TYPE_VIDEO);
-RTP_ASF_HANDLER(asf_pfa, "x-asf-pf", AVMEDIA_TYPE_AUDIO);
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