chasing indexing error

1 files changed, 0 insertions, 644 deletions

diff --git a/ffmpeg/libavformat/rtmppkt.c b/ffmpeg/libavformat/rtmppkt.c
deleted file mode 100644
index 375ae2f..0000000
--- a/ffmpeg/libavformat/rtmppkt.c
+++ /dev/null
@@ -1,644 +0,0 @@
-/*
- * RTMP input format
- * Copyright (c) 2009 Konstantin Shishkov
- *
- * 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 "libavcodec/bytestream.h"
-#include "libavutil/avstring.h"
-#include "libavutil/intfloat.h"
-#include "avformat.h"
-
-#include "rtmppkt.h"
-#include "flv.h"
-#include "url.h"
-
-void ff_amf_write_bool(uint8_t **dst, int val)
-{
-    bytestream_put_byte(dst, AMF_DATA_TYPE_BOOL);
-    bytestream_put_byte(dst, val);
-}
-
-void ff_amf_write_number(uint8_t **dst, double val)
-{
-    bytestream_put_byte(dst, AMF_DATA_TYPE_NUMBER);
-    bytestream_put_be64(dst, av_double2int(val));
-}
-
-void ff_amf_write_string(uint8_t **dst, const char *str)
-{
-    bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
-    bytestream_put_be16(dst, strlen(str));
-    bytestream_put_buffer(dst, str, strlen(str));
-}
-
-void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2)
-{
-    int len1 = 0, len2 = 0;
-    if (str1)
-        len1 = strlen(str1);
-    if (str2)
-        len2 = strlen(str2);
-    bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
-    bytestream_put_be16(dst, len1 + len2);
-    bytestream_put_buffer(dst, str1, len1);
-    bytestream_put_buffer(dst, str2, len2);
-}
-
-void ff_amf_write_null(uint8_t **dst)
-{
-    bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
-}
-
-void ff_amf_write_object_start(uint8_t **dst)
-{
-    bytestream_put_byte(dst, AMF_DATA_TYPE_OBJECT);
-}
-
-void ff_amf_write_field_name(uint8_t **dst, const char *str)
-{
-    bytestream_put_be16(dst, strlen(str));
-    bytestream_put_buffer(dst, str, strlen(str));
-}
-
-void ff_amf_write_object_end(uint8_t **dst)
-{
-    /* first two bytes are field name length = 0,
-     * AMF object should end with it and end marker
-     */
-    bytestream_put_be24(dst, AMF_DATA_TYPE_OBJECT_END);
-}
-
-int ff_amf_read_bool(GetByteContext *bc, int *val)
-{
-    if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_BOOL)
-        return AVERROR_INVALIDDATA;
-    *val = bytestream2_get_byte(bc);
-    return 0;
-}
-
-int ff_amf_read_number(GetByteContext *bc, double *val)
-{
-    uint64_t read;
-    if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
-        return AVERROR_INVALIDDATA;
-    read = bytestream2_get_be64(bc);
-    *val = av_int2double(read);
-    return 0;
-}
-
-int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
-                       int strsize, int *length)
-{
-    int stringlen = 0;
-    int readsize;
-    if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
-        return AVERROR_INVALIDDATA;
-    stringlen = bytestream2_get_be16(bc);
-    if (stringlen + 1 > strsize)
-        return AVERROR(EINVAL);
-    readsize = bytestream2_get_buffer(bc, str, stringlen);
-    if (readsize != stringlen) {
-        av_log(NULL, AV_LOG_WARNING,
-               "Unable to read as many bytes as AMF string signaled\n");
-    }
-    str[readsize] = '\0';
-    *length = FFMIN(stringlen, readsize);
-    return 0;
-}
-
-int ff_amf_read_null(GetByteContext *bc)
-{
-    if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
-        return AVERROR_INVALIDDATA;
-    return 0;
-}
-
-int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt,
-                              int channel)
-{
-    int nb_alloc;
-    RTMPPacket *ptr;
-    if (channel < *nb_prev_pkt)
-        return 0;
-
-    nb_alloc = channel + 16;
-    // This can't use the av_reallocp family of functions, since we
-    // would need to free each element in the array before the array
-    // itself is freed.
-    ptr = av_realloc_array(*prev_pkt, nb_alloc, sizeof(**prev_pkt));
-    if (!ptr)
-        return AVERROR(ENOMEM);
-    memset(ptr + *nb_prev_pkt, 0, (nb_alloc - *nb_prev_pkt) * sizeof(*ptr));
-    *prev_pkt = ptr;
-    *nb_prev_pkt = nb_alloc;
-    return 0;
-}
-
-int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
-                        int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
-{
-    uint8_t hdr;
-
-    if (ffurl_read(h, &hdr, 1) != 1)
-        return AVERROR(EIO);
-
-    return ff_rtmp_packet_read_internal(h, p, chunk_size, prev_pkt,
-                                        nb_prev_pkt, hdr);
-}
-
-static int rtmp_packet_read_one_chunk(URLContext *h, RTMPPacket *p,
-                                      int chunk_size, RTMPPacket **prev_pkt_ptr,
-                                      int *nb_prev_pkt, uint8_t hdr)
-{
-
-    uint8_t buf[16];
-    int channel_id, timestamp, size;
-    uint32_t extra = 0;
-    enum RTMPPacketType type;
-    int written = 0;
-    int ret, toread;
-    RTMPPacket *prev_pkt;
-
-    written++;
-    channel_id = hdr & 0x3F;
-
-    if (channel_id < 2) { //special case for channel number >= 64
-        buf[1] = 0;
-        if (ffurl_read_complete(h, buf, channel_id + 1) != channel_id + 1)
-            return AVERROR(EIO);
-        written += channel_id + 1;
-        channel_id = AV_RL16(buf) + 64;
-    }
-    if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
-                                         channel_id)) < 0)
-        return ret;
-    prev_pkt = *prev_pkt_ptr;
-    size  = prev_pkt[channel_id].size;
-    type  = prev_pkt[channel_id].type;
-    extra = prev_pkt[channel_id].extra;
-
-    hdr >>= 6;
-    if (hdr == RTMP_PS_ONEBYTE) {
-        timestamp = prev_pkt[channel_id].ts_delta;
-    } else {
-        if (ffurl_read_complete(h, buf, 3) != 3)
-            return AVERROR(EIO);
-        written += 3;
-        timestamp = AV_RB24(buf);
-        if (hdr != RTMP_PS_FOURBYTES) {
-            if (ffurl_read_complete(h, buf, 3) != 3)
-                return AVERROR(EIO);
-            written += 3;
-            size = AV_RB24(buf);
-            if (ffurl_read_complete(h, buf, 1) != 1)
-                return AVERROR(EIO);
-            written++;
-            type = buf[0];
-            if (hdr == RTMP_PS_TWELVEBYTES) {
-                if (ffurl_read_complete(h, buf, 4) != 4)
-                    return AVERROR(EIO);
-                written += 4;
-                extra = AV_RL32(buf);
-            }
-        }
-        if (timestamp == 0xFFFFFF) {
-            if (ffurl_read_complete(h, buf, 4) != 4)
-                return AVERROR(EIO);
-            timestamp = AV_RB32(buf);
-        }
-    }
-    if (hdr != RTMP_PS_TWELVEBYTES)
-        timestamp += prev_pkt[channel_id].timestamp;
-
-    if (!prev_pkt[channel_id].read) {
-        if ((ret = ff_rtmp_packet_create(p, channel_id, type, timestamp,
-                                         size)) < 0)
-            return ret;
-        p->read = written;
-        p->offset = 0;
-        prev_pkt[channel_id].ts_delta   = timestamp -
-                                          prev_pkt[channel_id].timestamp;
-        prev_pkt[channel_id].timestamp  = timestamp;
-    } else {
-        // previous packet in this channel hasn't completed reading
-        RTMPPacket *prev = &prev_pkt[channel_id];
-        p->data          = prev->data;
-        p->size          = prev->size;
-        p->channel_id    = prev->channel_id;
-        p->type          = prev->type;
-        p->ts_delta      = prev->ts_delta;
-        p->extra         = prev->extra;
-        p->offset        = prev->offset;
-        p->read          = prev->read + written;
-        p->timestamp     = prev->timestamp;
-        prev->data       = NULL;
-    }
-    p->extra = extra;
-    // save history
-    prev_pkt[channel_id].channel_id = channel_id;
-    prev_pkt[channel_id].type       = type;
-    prev_pkt[channel_id].size       = size;
-    prev_pkt[channel_id].extra      = extra;
-    size = size - p->offset;
-
-    toread = FFMIN(size, chunk_size);
-    if (ffurl_read_complete(h, p->data + p->offset, toread) != toread) {
-        ff_rtmp_packet_destroy(p);
-        return AVERROR(EIO);
-    }
-    size      -= toread;
-    p->read   += toread;
-    p->offset += toread;
-
-    if (size > 0) {
-       RTMPPacket *prev = &prev_pkt[channel_id];
-       prev->data = p->data;
-       prev->read = p->read;
-       prev->offset = p->offset;
-       return AVERROR(EAGAIN);
-    }
-
-    prev_pkt[channel_id].read = 0; // read complete; reset if needed
-    return p->read;
-}
-
-int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size,
-                                 RTMPPacket **prev_pkt, int *nb_prev_pkt,
-                                 uint8_t hdr)
-{
-    while (1) {
-        int ret = rtmp_packet_read_one_chunk(h, p, chunk_size, prev_pkt,
-                                             nb_prev_pkt, hdr);
-        if (ret > 0 || ret != AVERROR(EAGAIN))
-            return ret;
-
-        if (ffurl_read(h, &hdr, 1) != 1)
-            return AVERROR(EIO);
-    }
-}
-
-int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
-                         int chunk_size, RTMPPacket **prev_pkt_ptr,
-                         int *nb_prev_pkt)
-{
-    uint8_t pkt_hdr[16], *p = pkt_hdr;
-    int mode = RTMP_PS_TWELVEBYTES;
-    int off = 0;
-    int written = 0;
-    int ret;
-    RTMPPacket *prev_pkt;
-
-    if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
-                                         pkt->channel_id)) < 0)
-        return ret;
-    prev_pkt = *prev_pkt_ptr;
-
-    pkt->ts_delta = pkt->timestamp - prev_pkt[pkt->channel_id].timestamp;
-
-    //if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
-    if (prev_pkt[pkt->channel_id].channel_id &&
-        pkt->extra == prev_pkt[pkt->channel_id].extra) {
-        if (pkt->type == prev_pkt[pkt->channel_id].type &&
-            pkt->size == prev_pkt[pkt->channel_id].size) {
-            mode = RTMP_PS_FOURBYTES;
-            if (pkt->ts_delta == prev_pkt[pkt->channel_id].ts_delta)
-                mode = RTMP_PS_ONEBYTE;
-        } else {
-            mode = RTMP_PS_EIGHTBYTES;
-        }
-    }
-
-    if (pkt->channel_id < 64) {
-        bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
-    } else if (pkt->channel_id < 64 + 256) {
-        bytestream_put_byte(&p, 0               | (mode << 6));
-        bytestream_put_byte(&p, pkt->channel_id - 64);
-    } else {
-        bytestream_put_byte(&p, 1               | (mode << 6));
-        bytestream_put_le16(&p, pkt->channel_id - 64);
-    }
-    if (mode != RTMP_PS_ONEBYTE) {
-        uint32_t timestamp = pkt->timestamp;
-        if (mode != RTMP_PS_TWELVEBYTES)
-            timestamp = pkt->ts_delta;
-        bytestream_put_be24(&p, timestamp >= 0xFFFFFF ? 0xFFFFFF : timestamp);
-        if (mode != RTMP_PS_FOURBYTES) {
-            bytestream_put_be24(&p, pkt->size);
-            bytestream_put_byte(&p, pkt->type);
-            if (mode == RTMP_PS_TWELVEBYTES)
-                bytestream_put_le32(&p, pkt->extra);
-        }
-        if (timestamp >= 0xFFFFFF)
-            bytestream_put_be32(&p, timestamp);
-    }
-    // save history
-    prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
-    prev_pkt[pkt->channel_id].type       = pkt->type;
-    prev_pkt[pkt->channel_id].size       = pkt->size;
-    prev_pkt[pkt->channel_id].timestamp  = pkt->timestamp;
-    if (mode != RTMP_PS_TWELVEBYTES) {
-        prev_pkt[pkt->channel_id].ts_delta   = pkt->ts_delta;
-    } else {
-        prev_pkt[pkt->channel_id].ts_delta   = pkt->timestamp;
-    }
-    prev_pkt[pkt->channel_id].extra      = pkt->extra;
-
-    if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
-        return ret;
-    written = p - pkt_hdr + pkt->size;
-    while (off < pkt->size) {
-        int towrite = FFMIN(chunk_size, pkt->size - off);
-        if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
-            return ret;
-        off += towrite;
-        if (off < pkt->size) {
-            uint8_t marker = 0xC0 | pkt->channel_id;
-            if ((ret = ffurl_write(h, &marker, 1)) < 0)
-                return ret;
-            written++;
-        }
-    }
-    return written;
-}
-
-int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
-                          int timestamp, int size)
-{
-    if (size) {
-        pkt->data = av_malloc(size);
-        if (!pkt->data)
-            return AVERROR(ENOMEM);
-    }
-    pkt->size       = size;
-    pkt->channel_id = channel_id;
-    pkt->type       = type;
-    pkt->timestamp  = timestamp;
-    pkt->extra      = 0;
-    pkt->ts_delta   = 0;
-
-    return 0;
-}
-
-void ff_rtmp_packet_destroy(RTMPPacket *pkt)
-{
-    if (!pkt)
-        return;
-    av_freep(&pkt->data);
-    pkt->size = 0;
-}
-
-int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
-{
-    const uint8_t *base = data;
-    AMFDataType type;
-    unsigned nb   = -1;
-    int parse_key = 1;
-
-    if (data >= data_end)
-        return -1;
-    switch ((type = *data++)) {
-    case AMF_DATA_TYPE_NUMBER:      return 9;
-    case AMF_DATA_TYPE_BOOL:        return 2;
-    case AMF_DATA_TYPE_STRING:      return 3 + AV_RB16(data);
-    case AMF_DATA_TYPE_LONG_STRING: return 5 + AV_RB32(data);
-    case AMF_DATA_TYPE_NULL:        return 1;
-    case AMF_DATA_TYPE_ARRAY:
-        parse_key = 0;
-    case AMF_DATA_TYPE_MIXEDARRAY:
-        nb = bytestream_get_be32(&data);
-    case AMF_DATA_TYPE_OBJECT:
-        while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
-            int t;
-            if (parse_key) {
-                int size = bytestream_get_be16(&data);
-                if (!size) {
-                    data++;
-                    break;
-                }
-                if (size < 0 || size >= data_end - data)
-                    return -1;
-                data += size;
-            }
-            t = ff_amf_tag_size(data, data_end);
-            if (t < 0 || t >= data_end - data)
-                return -1;
-            data += t;
-        }
-        return data - base;
-    case AMF_DATA_TYPE_OBJECT_END:  return 1;
-    default:                        return -1;
-    }
-}
-
-int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
-                           const uint8_t *name, uint8_t *dst, int dst_size)
-{
-    int namelen = strlen(name);
-    int len;
-
-    while (*data != AMF_DATA_TYPE_OBJECT && data < data_end) {
-        len = ff_amf_tag_size(data, data_end);
-        if (len < 0)
-            len = data_end - data;
-        data += len;
-    }
-    if (data_end - data < 3)
-        return -1;
-    data++;
-    for (;;) {
-        int size = bytestream_get_be16(&data);
-        if (!size)
-            break;
-        if (size < 0 || size >= data_end - data)
-            return -1;
-        data += size;
-        if (size == namelen && !memcmp(data-size, name, namelen)) {
-            switch (*data++) {
-            case AMF_DATA_TYPE_NUMBER:
-                snprintf(dst, dst_size, "%g", av_int2double(AV_RB64(data)));
-                break;
-            case AMF_DATA_TYPE_BOOL:
-                snprintf(dst, dst_size, "%s", *data ? "true" : "false");
-                break;
-            case AMF_DATA_TYPE_STRING:
-                len = bytestream_get_be16(&data);
-                av_strlcpy(dst, data, FFMIN(len+1, dst_size));
-                break;
-            default:
-                return -1;
-            }
-            return 0;
-        }
-        len = ff_amf_tag_size(data, data_end);
-        if (len < 0 || len >= data_end - data)
-            return -1;
-        data += len;
-    }
-    return -1;
-}
-
-static const char* rtmp_packet_type(int type)
-{
-    switch (type) {
-    case RTMP_PT_CHUNK_SIZE:     return "chunk size";
-    case RTMP_PT_BYTES_READ:     return "bytes read";
-    case RTMP_PT_PING:           return "ping";
-    case RTMP_PT_SERVER_BW:      return "server bandwidth";
-    case RTMP_PT_CLIENT_BW:      return "client bandwidth";
-    case RTMP_PT_AUDIO:          return "audio packet";
-    case RTMP_PT_VIDEO:          return "video packet";
-    case RTMP_PT_FLEX_STREAM:    return "Flex shared stream";
-    case RTMP_PT_FLEX_OBJECT:    return "Flex shared object";
-    case RTMP_PT_FLEX_MESSAGE:   return "Flex shared message";
-    case RTMP_PT_NOTIFY:         return "notification";
-    case RTMP_PT_SHARED_OBJ:     return "shared object";
-    case RTMP_PT_INVOKE:         return "invoke";
-    case RTMP_PT_METADATA:       return "metadata";
-    default:                     return "unknown";
-    }
-}
-
-static void amf_tag_contents(void *ctx, const uint8_t *data,
-                             const uint8_t *data_end)
-{
-    unsigned int size, nb = -1;
-    char buf[1024];
-    AMFDataType type;
-    int parse_key = 1;
-
-    if (data >= data_end)
-        return;
-    switch ((type = *data++)) {
-    case AMF_DATA_TYPE_NUMBER:
-        av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
-        return;
-    case AMF_DATA_TYPE_BOOL:
-        av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
-        return;
-    case AMF_DATA_TYPE_STRING:
-    case AMF_DATA_TYPE_LONG_STRING:
-        if (type == AMF_DATA_TYPE_STRING) {
-            size = bytestream_get_be16(&data);
-        } else {
-            size = bytestream_get_be32(&data);
-        }
-        size = FFMIN(size, sizeof(buf) - 1);
-        memcpy(buf, data, size);
-        buf[size] = 0;
-        av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
-        return;
-    case AMF_DATA_TYPE_NULL:
-        av_log(ctx, AV_LOG_DEBUG, " NULL\n");
-        return;
-    case AMF_DATA_TYPE_ARRAY:
-        parse_key = 0;
-    case AMF_DATA_TYPE_MIXEDARRAY:
-        nb = bytestream_get_be32(&data);
-    case AMF_DATA_TYPE_OBJECT:
-        av_log(ctx, AV_LOG_DEBUG, " {\n");
-        while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
-            int t;
-            if (parse_key) {
-                size = bytestream_get_be16(&data);
-                size = FFMIN(size, sizeof(buf) - 1);
-                if (!size) {
-                    av_log(ctx, AV_LOG_DEBUG, " }\n");
-                    data++;
-                    break;
-                }
-                memcpy(buf, data, size);
-                buf[size] = 0;
-                if (size >= data_end - data)
-                    return;
-                data += size;
-                av_log(ctx, AV_LOG_DEBUG, "  %s: ", buf);
-            }
-            amf_tag_contents(ctx, data, data_end);
-            t = ff_amf_tag_size(data, data_end);
-            if (t < 0 || t >= data_end - data)
-                return;
-            data += t;
-        }
-        return;
-    case AMF_DATA_TYPE_OBJECT_END:
-        av_log(ctx, AV_LOG_DEBUG, " }\n");
-        return;
-    default:
-        return;
-    }
-}
-
-void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
-{
-    av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
-           rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
-    if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
-        uint8_t *src = p->data, *src_end = p->data + p->size;
-        while (src < src_end) {
-            int sz;
-            amf_tag_contents(ctx, src, src_end);
-            sz = ff_amf_tag_size(src, src_end);
-            if (sz < 0)
-                break;
-            src += sz;
-        }
-    } else if (p->type == RTMP_PT_SERVER_BW){
-        av_log(ctx, AV_LOG_DEBUG, "Server BW = %d\n", AV_RB32(p->data));
-    } else if (p->type == RTMP_PT_CLIENT_BW){
-        av_log(ctx, AV_LOG_DEBUG, "Client BW = %d\n", AV_RB32(p->data));
-    } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
-        int i;
-        for (i = 0; i < p->size; i++)
-            av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
-        av_log(ctx, AV_LOG_DEBUG, "\n");
-    }
-}
-
-int ff_amf_match_string(const uint8_t *data, int size, const char *str)
-{
-    int len = strlen(str);
-    int amf_len, type;
-
-    if (size < 1)
-        return 0;
-
-    type = *data++;
-
-    if (type != AMF_DATA_TYPE_LONG_STRING &&
-        type != AMF_DATA_TYPE_STRING)
-        return 0;
-
-    if (type == AMF_DATA_TYPE_LONG_STRING) {
-        if ((size -= 4 + 1) < 0)
-            return 0;
-        amf_len = bytestream_get_be32(&data);
-    } else {
-        if ((size -= 2 + 1) < 0)
-            return 0;
-        amf_len = bytestream_get_be16(&data);
-    }
-
-    if (amf_len > size)
-        return 0;
-
-    if (amf_len != len)
-        return 0;
-
-    return !memcmp(data, str, len);
-}