chasing indexing error

1 files changed, 0 insertions, 573 deletions

diff --git a/ffmpeg/libavformat/rdt.c b/ffmpeg/libavformat/rdt.c
deleted file mode 100644
index 201a3e0..0000000
--- a/ffmpeg/libavformat/rdt.c
+++ /dev/null
@@ -1,573 +0,0 @@
-/*
- * Realmedia RTSP protocol (RDT) support.
- * Copyright (c) 2007 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 Realmedia RTSP protocol (RDT) support
- * @author Ronald S. Bultje <rbultje@ronald.bitfreak.net>
- */
-
-#include "avformat.h"
-#include "libavutil/avstring.h"
-#include "rtpdec.h"
-#include "rdt.h"
-#include "libavutil/base64.h"
-#include "libavutil/md5.h"
-#include "rm.h"
-#include "internal.h"
-#include "avio_internal.h"
-#include "libavcodec/get_bits.h"
-
-struct RDTDemuxContext {
-    AVFormatContext *ic; /**< the containing (RTSP) demux context */
-    /** Each RDT stream-set (represented by one RTSPStream) can contain
-     * multiple streams (of the same content, but with possibly different
-     * codecs/bitrates). Each such stream is represented by one AVStream
-     * in the AVFormatContext, and this variable points to the offset in
-     * that array such that the first is the first stream of this set. */
-    AVStream **streams;
-    int n_streams; /**< streams with identifical content in this set */
-    void *dynamic_protocol_context;
-    DynamicPayloadPacketHandlerProc parse_packet;
-    uint32_t prev_timestamp;
-    int prev_set_id, prev_stream_id;
-};
-
-RDTDemuxContext *
-ff_rdt_parse_open(AVFormatContext *ic, int first_stream_of_set_idx,
-                  void *priv_data, RTPDynamicProtocolHandler *handler)
-{
-    RDTDemuxContext *s = av_mallocz(sizeof(RDTDemuxContext));
-    if (!s)
-        return NULL;
-
-    s->ic = ic;
-    s->streams = &ic->streams[first_stream_of_set_idx];
-    do {
-        s->n_streams++;
-    } while (first_stream_of_set_idx + s->n_streams < ic->nb_streams &&
-             s->streams[s->n_streams]->id == s->streams[0]->id);
-    s->prev_set_id    = -1;
-    s->prev_stream_id = -1;
-    s->prev_timestamp = -1;
-    s->parse_packet = handler ? handler->parse_packet : NULL;
-    s->dynamic_protocol_context = priv_data;
-
-    return s;
-}
-
-void
-ff_rdt_parse_close(RDTDemuxContext *s)
-{
-    av_free(s);
-}
-
-struct PayloadContext {
-    AVFormatContext *rmctx;
-    int nb_rmst;
-    RMStream **rmst;
-    uint8_t *mlti_data;
-    unsigned int mlti_data_size;
-    char buffer[RTP_MAX_PACKET_LENGTH + FF_INPUT_BUFFER_PADDING_SIZE];
-    int audio_pkt_cnt; /**< remaining audio packets in rmdec */
-};
-
-void
-ff_rdt_calc_response_and_checksum(char response[41], char chksum[9],
-                                  const char *challenge)
-{
-    int ch_len = strlen (challenge), i;
-    unsigned char zres[16],
-        buf[64] = { 0xa1, 0xe9, 0x14, 0x9d, 0x0e, 0x6b, 0x3b, 0x59 };
-#define XOR_TABLE_SIZE 37
-    static const unsigned char xor_table[XOR_TABLE_SIZE] = {
-        0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53,
-        0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70,
-        0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09,
-        0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02,
-        0x10, 0x57, 0x05, 0x18, 0x54 };
-
-    /* some (length) checks */
-    if (ch_len == 40) /* what a hack... */
-        ch_len = 32;
-    else if (ch_len > 56)
-        ch_len = 56;
-    memcpy(buf + 8, challenge, ch_len);
-
-    /* xor challenge bytewise with xor_table */
-    for (i = 0; i < XOR_TABLE_SIZE; i++)
-        buf[8 + i] ^= xor_table[i];
-
-    av_md5_sum(zres, buf, 64);
-    ff_data_to_hex(response, zres, 16, 1);
-
-    /* add tail */
-    strcpy (response + 32, "01d0a8e3");
-
-    /* calculate checksum */
-    for (i = 0; i < 8; i++)
-        chksum[i] = response[i * 4];
-    chksum[8] = 0;
-}
-
-static int
-rdt_load_mdpr (PayloadContext *rdt, AVStream *st, int rule_nr)
-{
-    AVIOContext pb;
-    int size;
-    uint32_t tag;
-
-    /**
-     * Layout of the MLTI chunk:
-     * 4: MLTI
-     * 2: number of streams
-     * Then for each stream ([number_of_streams] times):
-     *     2: mdpr index
-     * 2: number of mdpr chunks
-     * Then for each mdpr chunk ([number_of_mdpr_chunks] times):
-     *     4: size
-     *     [size]: data
-     * we skip MDPR chunks until we reach the one of the stream
-     * we're interested in, and forward that ([size]+[data]) to
-     * the RM demuxer to parse the stream-specific header data.
-     */
-    if (!rdt->mlti_data)
-        return -1;
-    ffio_init_context(&pb, rdt->mlti_data, rdt->mlti_data_size, 0,
-                  NULL, NULL, NULL, NULL);
-    tag = avio_rl32(&pb);
-    if (tag == MKTAG('M', 'L', 'T', 'I')) {
-        int num, chunk_nr;
-
-        /* read index of MDPR chunk numbers */
-        num = avio_rb16(&pb);
-        if (rule_nr < 0 || rule_nr >= num)
-            return -1;
-        avio_skip(&pb, rule_nr * 2);
-        chunk_nr = avio_rb16(&pb);
-        avio_skip(&pb, (num - 1 - rule_nr) * 2);
-
-        /* read MDPR chunks */
-        num = avio_rb16(&pb);
-        if (chunk_nr >= num)
-            return -1;
-        while (chunk_nr--)
-            avio_skip(&pb, avio_rb32(&pb));
-        size = avio_rb32(&pb);
-    } else {
-        size = rdt->mlti_data_size;
-        avio_seek(&pb, 0, SEEK_SET);
-    }
-    if (ff_rm_read_mdpr_codecdata(rdt->rmctx, &pb, st, rdt->rmst[st->index], size, NULL) < 0)
-        return -1;
-
-    return 0;
-}
-
-/**
- * Actual data handling.
- */
-
-int
-ff_rdt_parse_header(const uint8_t *buf, int len,
-                    int *pset_id, int *pseq_no, int *pstream_id,
-                    int *pis_keyframe, uint32_t *ptimestamp)
-{
-    GetBitContext gb;
-    int consumed = 0, set_id, seq_no, stream_id, is_keyframe,
-        len_included, need_reliable;
-    uint32_t timestamp;
-
-    /* skip status packets */
-    while (len >= 5 && buf[1] == 0xFF /* status packet */) {
-        int pkt_len;
-
-        if (!(buf[0] & 0x80))
-            return -1; /* not followed by a data packet */
-
-        pkt_len = AV_RB16(buf+3);
-        buf += pkt_len;
-        len -= pkt_len;
-        consumed += pkt_len;
-    }
-    if (len < 16)
-        return -1;
-    /**
-     * Layout of the header (in bits):
-     * 1:  len_included
-     *     Flag indicating whether this header includes a length field;
-     *     this can be used to concatenate multiple RDT packets in a
-     *     single UDP/TCP data frame and is used to precede RDT data
-     *     by stream status packets
-     * 1:  need_reliable
-     *     Flag indicating whether this header includes a "reliable
-     *     sequence number"; these are apparently sequence numbers of
-     *     data packets alone. For data packets, this flag is always
-     *     set, according to the Real documentation [1]
-     * 5:  set_id
-     *     ID of a set of streams of identical content, possibly with
-     *     different codecs or bitrates
-     * 1:  is_reliable
-     *     Flag set for certain streams deemed less tolerable for packet
-     *     loss
-     * 16: seq_no
-     *     Packet sequence number; if >=0xFF00, this is a non-data packet
-     *     containing stream status info, the second byte indicates the
-     *     type of status packet (see wireshark docs / source code [2])
-     * if (len_included) {
-     *     16: packet_len
-     * } else {
-     *     packet_len = remainder of UDP/TCP frame
-     * }
-     * 1:  is_back_to_back
-     *     Back-to-Back flag; used for timing, set for one in every 10
-     *     packets, according to the Real documentation [1]
-     * 1:  is_slow_data
-     *     Slow-data flag; currently unused, according to Real docs [1]
-     * 5:  stream_id
-     *     ID of the stream within this particular set of streams
-     * 1:  is_no_keyframe
-     *     Non-keyframe flag (unset if packet belongs to a keyframe)
-     * 32: timestamp (PTS)
-     * if (set_id == 0x1F) {
-     *     16: set_id (extended set-of-streams ID; see set_id)
-     * }
-     * if (need_reliable) {
-     *     16: reliable_seq_no
-     *         Reliable sequence number (see need_reliable)
-     * }
-     * if (stream_id == 0x3F) {
-     *     16: stream_id (extended stream ID; see stream_id)
-     * }
-     * [1] https://protocol.helixcommunity.org/files/2005/devdocs/RDT_Feature_Level_20.txt
-     * [2] http://www.wireshark.org/docs/dfref/r/rdt.html and
-     *     http://anonsvn.wireshark.org/viewvc/trunk/epan/dissectors/packet-rdt.c
-     */
-    init_get_bits(&gb, buf, len << 3);
-    len_included  = get_bits1(&gb);
-    need_reliable = get_bits1(&gb);
-    set_id        = get_bits(&gb, 5);
-    skip_bits(&gb, 1);
-    seq_no        = get_bits(&gb, 16);
-    if (len_included)
-        skip_bits(&gb, 16);
-    skip_bits(&gb, 2);
-    stream_id     = get_bits(&gb, 5);
-    is_keyframe   = !get_bits1(&gb);
-    timestamp     = get_bits_long(&gb, 32);
-    if (set_id == 0x1f)
-        set_id    = get_bits(&gb, 16);
-    if (need_reliable)
-        skip_bits(&gb, 16);
-    if (stream_id == 0x1f)
-        stream_id = get_bits(&gb, 16);
-
-    if (pset_id)      *pset_id      = set_id;
-    if (pseq_no)      *pseq_no      = seq_no;
-    if (pstream_id)   *pstream_id   = stream_id;
-    if (pis_keyframe) *pis_keyframe = is_keyframe;
-    if (ptimestamp)   *ptimestamp   = timestamp;
-
-    return consumed + (get_bits_count(&gb) >> 3);
-}
-
-/**< return 0 on packet, no more left, 1 on packet, 1 on partial packet... */
-static int
-rdt_parse_packet (AVFormatContext *ctx, PayloadContext *rdt, AVStream *st,
-                  AVPacket *pkt, uint32_t *timestamp,
-                  const uint8_t *buf, int len, uint16_t rtp_seq, int flags)
-{
-    int seq = 1, res;
-    AVIOContext pb;
-
-    if (rdt->audio_pkt_cnt == 0) {
-        int pos;
-
-        ffio_init_context(&pb, buf, len, 0, NULL, NULL, NULL, NULL);
-        flags = (flags & RTP_FLAG_KEY) ? 2 : 0;
-        res = ff_rm_parse_packet (rdt->rmctx, &pb, st, rdt->rmst[st->index], len, pkt,
-                                  &seq, flags, *timestamp);
-        pos = avio_tell(&pb);
-        if (res < 0)
-            return res;
-        if (res > 0) {
-            if (st->codec->codec_id == AV_CODEC_ID_AAC) {
-                memcpy (rdt->buffer, buf + pos, len - pos);
-                rdt->rmctx->pb = avio_alloc_context (rdt->buffer, len - pos, 0,
-                                                    NULL, NULL, NULL, NULL);
-            }
-            goto get_cache;
-        }
-    } else {
-get_cache:
-        rdt->audio_pkt_cnt =
-            ff_rm_retrieve_cache (rdt->rmctx, rdt->rmctx->pb,
-                                  st, rdt->rmst[st->index], pkt);
-        if (rdt->audio_pkt_cnt == 0 &&
-            st->codec->codec_id == AV_CODEC_ID_AAC)
-            av_freep(&rdt->rmctx->pb);
-    }
-    pkt->stream_index = st->index;
-    pkt->pts = *timestamp;
-
-    return rdt->audio_pkt_cnt > 0;
-}
-
-int
-ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt,
-                    uint8_t **bufptr, int len)
-{
-    uint8_t *buf = bufptr ? *bufptr : NULL;
-    int seq_no, flags = 0, stream_id, set_id, is_keyframe;
-    uint32_t timestamp;
-    int rv= 0;
-
-    if (!s->parse_packet)
-        return -1;
-
-    if (!buf && s->prev_stream_id != -1) {
-        /* return the next packets, if any */
-        timestamp= 0; ///< Should not be used if buf is NULL, but should be set to the timestamp of the packet returned....
-        rv= s->parse_packet(s->ic, s->dynamic_protocol_context,
-                            s->streams[s->prev_stream_id],
-                            pkt, &timestamp, NULL, 0, 0, flags);
-        return rv;
-    }
-
-    if (len < 12)
-        return -1;
-    rv = ff_rdt_parse_header(buf, len, &set_id, &seq_no, &stream_id, &is_keyframe, &timestamp);
-    if (rv < 0)
-        return rv;
-    if (is_keyframe &&
-        (set_id != s->prev_set_id || timestamp != s->prev_timestamp ||
-         stream_id != s->prev_stream_id)) {
-        flags |= RTP_FLAG_KEY;
-        s->prev_set_id    = set_id;
-        s->prev_timestamp = timestamp;
-    }
-    s->prev_stream_id = stream_id;
-    buf += rv;
-    len -= rv;
-
-     if (s->prev_stream_id >= s->n_streams) {
-         s->prev_stream_id = -1;
-         return -1;
-     }
-
-    rv = s->parse_packet(s->ic, s->dynamic_protocol_context,
-                         s->streams[s->prev_stream_id],
-                         pkt, &timestamp, buf, len, 0, flags);
-
-    return rv;
-}
-
-void
-ff_rdt_subscribe_rule (char *cmd, int size,
-                       int stream_nr, int rule_nr)
-{
-    av_strlcatf(cmd, size, "stream=%d;rule=%d,stream=%d;rule=%d",
-                stream_nr, rule_nr * 2, stream_nr, rule_nr * 2 + 1);
-}
-
-static unsigned char *
-rdt_parse_b64buf (unsigned int *target_len, const char *p)
-{
-    unsigned char *target;
-    int len = strlen(p);
-    if (*p == '\"') {
-        p++;
-        len -= 2; /* skip embracing " at start/end */
-    }
-    *target_len = len * 3 / 4;
-    target = av_mallocz(*target_len + FF_INPUT_BUFFER_PADDING_SIZE);
-    av_base64_decode(target, p, *target_len);
-    return target;
-}
-
-static int
-rdt_parse_sdp_line (AVFormatContext *s, int st_index,
-                    PayloadContext *rdt, const char *line)
-{
-    AVStream *stream = s->streams[st_index];
-    const char *p = line;
-
-    if (av_strstart(p, "OpaqueData:buffer;", &p)) {
-        rdt->mlti_data = rdt_parse_b64buf(&rdt->mlti_data_size, p);
-    } else if (av_strstart(p, "StartTime:integer;", &p))
-        stream->first_dts = atoi(p);
-    else if (av_strstart(p, "ASMRuleBook:string;", &p)) {
-        int n, first = -1;
-
-        for (n = 0; n < s->nb_streams; n++)
-            if (s->streams[n]->id == stream->id) {
-                int count = s->streams[n]->index + 1, err;
-                if (first == -1) first = n;
-                if (rdt->nb_rmst < count) {
-                    if ((err = av_reallocp(&rdt->rmst,
-                                           count * sizeof(*rdt->rmst))) < 0) {
-                        rdt->nb_rmst = 0;
-                        return err;
-                    }
-                    memset(rdt->rmst + rdt->nb_rmst, 0,
-                           (count - rdt->nb_rmst) * sizeof(*rdt->rmst));
-                    rdt->nb_rmst = count;
-                }
-                rdt->rmst[s->streams[n]->index] = ff_rm_alloc_rmstream();
-                rdt_load_mdpr(rdt, s->streams[n], (n - first) * 2);
-           }
-    }
-
-    return 0;
-}
-
-static void
-real_parse_asm_rule(AVStream *st, const char *p, const char *end)
-{
-    do {
-        /* can be either averagebandwidth= or AverageBandwidth= */
-        if (sscanf(p, " %*1[Aa]verage%*1[Bb]andwidth=%d", &st->codec->bit_rate) == 1)
-            break;
-        if (!(p = strchr(p, ',')) || p > end)
-            p = end;
-        p++;
-    } while (p < end);
-}
-
-static AVStream *
-add_dstream(AVFormatContext *s, AVStream *orig_st)
-{
-    AVStream *st;
-
-    if (!(st = avformat_new_stream(s, NULL)))
-        return NULL;
-    st->id = orig_st->id;
-    st->codec->codec_type = orig_st->codec->codec_type;
-    st->first_dts         = orig_st->first_dts;
-
-    return st;
-}
-
-static void
-real_parse_asm_rulebook(AVFormatContext *s, AVStream *orig_st,
-                        const char *p)
-{
-    const char *end;
-    int n_rules = 0, odd = 0;
-    AVStream *st;
-
-    /**
-     * The ASMRuleBook contains a list of comma-separated strings per rule,
-     * and each rule is separated by a ;. The last one also has a ; at the
-     * end so we can use it as delimiter.
-     * Every rule occurs twice, once for when the RTSP packet header marker
-     * is set and once for if it isn't. We only read the first because we
-     * don't care much (that's what the "odd" variable is for).
-     * Each rule contains a set of one or more statements, optionally
-     * preceded by a single condition. If there's a condition, the rule
-     * starts with a '#'. Multiple conditions are merged between brackets,
-     * so there are never multiple conditions spread out over separate
-     * statements. Generally, these conditions are bitrate limits (min/max)
-     * for multi-bitrate streams.
-     */
-    if (*p == '\"') p++;
-    while (1) {
-        if (!(end = strchr(p, ';')))
-            break;
-        if (!odd && end != p) {
-            if (n_rules > 0)
-                st = add_dstream(s, orig_st);
-            else
-                st = orig_st;
-            if (!st)
-                break;
-            real_parse_asm_rule(st, p, end);
-            n_rules++;
-        }
-        p = end + 1;
-        odd ^= 1;
-    }
-}
-
-void
-ff_real_parse_sdp_a_line (AVFormatContext *s, int stream_index,
-                          const char *line)
-{
-    const char *p = line;
-
-    if (av_strstart(p, "ASMRuleBook:string;", &p))
-        real_parse_asm_rulebook(s, s->streams[stream_index], p);
-}
-
-static PayloadContext *
-rdt_new_context (void)
-{
-    PayloadContext *rdt = av_mallocz(sizeof(PayloadContext));
-
-    int ret = avformat_open_input(&rdt->rmctx, "", &ff_rdt_demuxer, NULL);
-    if (ret < 0) {
-        av_free(rdt);
-        return NULL;
-    }
-
-    return rdt;
-}
-
-static void
-rdt_free_context (PayloadContext *rdt)
-{
-    int i;
-
-    for (i = 0; i < rdt->nb_rmst; i++)
-        if (rdt->rmst[i]) {
-            ff_rm_free_rmstream(rdt->rmst[i]);
-            av_freep(&rdt->rmst[i]);
-        }
-    if (rdt->rmctx)
-        avformat_close_input(&rdt->rmctx);
-    av_freep(&rdt->mlti_data);
-    av_freep(&rdt->rmst);
-    av_free(rdt);
-}
-
-#define RDT_HANDLER(n, s, t) \
-static RTPDynamicProtocolHandler rdt_ ## n ## _handler = { \
-    .enc_name         = s, \
-    .codec_type       = t, \
-    .codec_id         = AV_CODEC_ID_NONE, \
-    .parse_sdp_a_line = rdt_parse_sdp_line, \
-    .alloc            = rdt_new_context, \
-    .free             = rdt_free_context, \
-    .parse_packet     = rdt_parse_packet \
-}
-
-RDT_HANDLER(live_video, "x-pn-multirate-realvideo-live", AVMEDIA_TYPE_VIDEO);
-RDT_HANDLER(live_audio, "x-pn-multirate-realaudio-live", AVMEDIA_TYPE_AUDIO);
-RDT_HANDLER(video,      "x-pn-realvideo",                AVMEDIA_TYPE_VIDEO);
-RDT_HANDLER(audio,      "x-pn-realaudio",                AVMEDIA_TYPE_AUDIO);
-
-void ff_register_rdt_dynamic_payload_handlers(void)
-{
-    ff_register_dynamic_payload_handler(&rdt_video_handler);
-    ff_register_dynamic_payload_handler(&rdt_audio_handler);
-    ff_register_dynamic_payload_handler(&rdt_live_video_handler);
-    ff_register_dynamic_payload_handler(&rdt_live_audio_handler);
-}