yading@11: /*
yading@11:  * RTMP input format
yading@11:  * Copyright (c) 2009 Kostya Shishkov
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavcodec/bytestream.h"
yading@11: #include "libavutil/avstring.h"
yading@11: #include "libavutil/intfloat.h"
yading@11: #include "avformat.h"
yading@11: 
yading@11: #include "rtmppkt.h"
yading@11: #include "flv.h"
yading@11: #include "url.h"
yading@11: 
yading@11: void ff_amf_write_bool(uint8_t **dst, int val)
yading@11: {
yading@11:     bytestream_put_byte(dst, AMF_DATA_TYPE_BOOL);
yading@11:     bytestream_put_byte(dst, val);
yading@11: }
yading@11: 
yading@11: void ff_amf_write_number(uint8_t **dst, double val)
yading@11: {
yading@11:     bytestream_put_byte(dst, AMF_DATA_TYPE_NUMBER);
yading@11:     bytestream_put_be64(dst, av_double2int(val));
yading@11: }
yading@11: 
yading@11: void ff_amf_write_string(uint8_t **dst, const char *str)
yading@11: {
yading@11:     bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
yading@11:     bytestream_put_be16(dst, strlen(str));
yading@11:     bytestream_put_buffer(dst, str, strlen(str));
yading@11: }
yading@11: 
yading@11: void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2)
yading@11: {
yading@11:     int len1 = 0, len2 = 0;
yading@11:     if (str1)
yading@11:         len1 = strlen(str1);
yading@11:     if (str2)
yading@11:         len2 = strlen(str2);
yading@11:     bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
yading@11:     bytestream_put_be16(dst, len1 + len2);
yading@11:     bytestream_put_buffer(dst, str1, len1);
yading@11:     bytestream_put_buffer(dst, str2, len2);
yading@11: }
yading@11: 
yading@11: void ff_amf_write_null(uint8_t **dst)
yading@11: {
yading@11:     bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
yading@11: }
yading@11: 
yading@11: void ff_amf_write_object_start(uint8_t **dst)
yading@11: {
yading@11:     bytestream_put_byte(dst, AMF_DATA_TYPE_OBJECT);
yading@11: }
yading@11: 
yading@11: void ff_amf_write_field_name(uint8_t **dst, const char *str)
yading@11: {
yading@11:     bytestream_put_be16(dst, strlen(str));
yading@11:     bytestream_put_buffer(dst, str, strlen(str));
yading@11: }
yading@11: 
yading@11: void ff_amf_write_object_end(uint8_t **dst)
yading@11: {
yading@11:     /* first two bytes are field name length = 0,
yading@11:      * AMF object should end with it and end marker
yading@11:      */
yading@11:     bytestream_put_be24(dst, AMF_DATA_TYPE_OBJECT_END);
yading@11: }
yading@11: 
yading@11: int ff_amf_read_bool(GetByteContext *bc, int *val)
yading@11: {
yading@11:     if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_BOOL)
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     *val = bytestream2_get_byte(bc);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int ff_amf_read_number(GetByteContext *bc, double *val)
yading@11: {
yading@11:     uint64_t read;
yading@11:     if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     read = bytestream2_get_be64(bc);
yading@11:     *val = av_int2double(read);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
yading@11:                        int strsize, int *length)
yading@11: {
yading@11:     int stringlen = 0;
yading@11:     int readsize;
yading@11:     if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     stringlen = bytestream2_get_be16(bc);
yading@11:     if (stringlen + 1 > strsize)
yading@11:         return AVERROR(EINVAL);
yading@11:     readsize = bytestream2_get_buffer(bc, str, stringlen);
yading@11:     if (readsize != stringlen) {
yading@11:         av_log(NULL, AV_LOG_WARNING,
yading@11:                "Unable to read as many bytes as AMF string signaled\n");
yading@11:     }
yading@11:     str[readsize] = '\0';
yading@11:     *length = FFMIN(stringlen, readsize);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int ff_amf_read_null(GetByteContext *bc)
yading@11: {
yading@11:     if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
yading@11:         return AVERROR_INVALIDDATA;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
yading@11:                         int chunk_size, RTMPPacket *prev_pkt)
yading@11: {
yading@11:     uint8_t hdr;
yading@11: 
yading@11:     if (ffurl_read(h, &hdr, 1) != 1)
yading@11:         return AVERROR(EIO);
yading@11: 
yading@11:     return ff_rtmp_packet_read_internal(h, p, chunk_size, prev_pkt, hdr);
yading@11: }
yading@11: 
yading@11: int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size,
yading@11:                                  RTMPPacket *prev_pkt, uint8_t hdr)
yading@11: {
yading@11: 
yading@11:     uint8_t t, buf[16];
yading@11:     int channel_id, timestamp, data_size, offset = 0;
yading@11:     uint32_t extra = 0;
yading@11:     enum RTMPPacketType type;
yading@11:     int size = 0;
yading@11:     int ret;
yading@11: 
yading@11:     size++;
yading@11:     channel_id = hdr & 0x3F;
yading@11: 
yading@11:     if (channel_id < 2) { //special case for channel number >= 64
yading@11:         buf[1] = 0;
yading@11:         if (ffurl_read_complete(h, buf, channel_id + 1) != channel_id + 1)
yading@11:             return AVERROR(EIO);
yading@11:         size += channel_id + 1;
yading@11:         channel_id = AV_RL16(buf) + 64;
yading@11:     }
yading@11:     data_size = prev_pkt[channel_id].data_size;
yading@11:     type      = prev_pkt[channel_id].type;
yading@11:     extra     = prev_pkt[channel_id].extra;
yading@11: 
yading@11:     hdr >>= 6;
yading@11:     if (hdr == RTMP_PS_ONEBYTE) {
yading@11:         timestamp = prev_pkt[channel_id].ts_delta;
yading@11:     } else {
yading@11:         if (ffurl_read_complete(h, buf, 3) != 3)
yading@11:             return AVERROR(EIO);
yading@11:         size += 3;
yading@11:         timestamp = AV_RB24(buf);
yading@11:         if (hdr != RTMP_PS_FOURBYTES) {
yading@11:             if (ffurl_read_complete(h, buf, 3) != 3)
yading@11:                 return AVERROR(EIO);
yading@11:             size += 3;
yading@11:             data_size = AV_RB24(buf);
yading@11:             if (ffurl_read_complete(h, buf, 1) != 1)
yading@11:                 return AVERROR(EIO);
yading@11:             size++;
yading@11:             type = buf[0];
yading@11:             if (hdr == RTMP_PS_TWELVEBYTES) {
yading@11:                 if (ffurl_read_complete(h, buf, 4) != 4)
yading@11:                     return AVERROR(EIO);
yading@11:                 size += 4;
yading@11:                 extra = AV_RL32(buf);
yading@11:             }
yading@11:         }
yading@11:         if (timestamp == 0xFFFFFF) {
yading@11:             if (ffurl_read_complete(h, buf, 4) != 4)
yading@11:                 return AVERROR(EIO);
yading@11:             timestamp = AV_RB32(buf);
yading@11:         }
yading@11:     }
yading@11:     if (hdr != RTMP_PS_TWELVEBYTES)
yading@11:         timestamp += prev_pkt[channel_id].timestamp;
yading@11: 
yading@11:     if ((ret = ff_rtmp_packet_create(p, channel_id, type, timestamp,
yading@11:                                      data_size)) < 0)
yading@11:         return ret;
yading@11:     p->extra = extra;
yading@11:     // save history
yading@11:     prev_pkt[channel_id].channel_id = channel_id;
yading@11:     prev_pkt[channel_id].type       = type;
yading@11:     prev_pkt[channel_id].data_size  = data_size;
yading@11:     prev_pkt[channel_id].ts_delta   = timestamp - prev_pkt[channel_id].timestamp;
yading@11:     prev_pkt[channel_id].timestamp  = timestamp;
yading@11:     prev_pkt[channel_id].extra      = extra;
yading@11:     while (data_size > 0) {
yading@11:         int toread = FFMIN(data_size, chunk_size);
yading@11:         if (ffurl_read_complete(h, p->data + offset, toread) != toread) {
yading@11:             ff_rtmp_packet_destroy(p);
yading@11:             return AVERROR(EIO);
yading@11:         }
yading@11:         data_size -= chunk_size;
yading@11:         offset    += chunk_size;
yading@11:         size      += chunk_size;
yading@11:         if (data_size > 0) {
yading@11:             if ((ret = ffurl_read_complete(h, &t, 1)) < 0) { // marker
yading@11:                 ff_rtmp_packet_destroy(p);
yading@11:                 return ret;
yading@11:             }
yading@11:             size++;
yading@11:             if (t != (0xC0 + channel_id))
yading@11:                 return -1;
yading@11:         }
yading@11:     }
yading@11:     return size;
yading@11: }
yading@11: 
yading@11: int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
yading@11:                          int chunk_size, RTMPPacket *prev_pkt)
yading@11: {
yading@11:     uint8_t pkt_hdr[16], *p = pkt_hdr;
yading@11:     int mode = RTMP_PS_TWELVEBYTES;
yading@11:     int off = 0;
yading@11:     int size = 0;
yading@11:     int ret;
yading@11: 
yading@11:     pkt->ts_delta = pkt->timestamp - prev_pkt[pkt->channel_id].timestamp;
yading@11: 
yading@11:     //if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
yading@11:     if (prev_pkt[pkt->channel_id].channel_id &&
yading@11:         pkt->extra == prev_pkt[pkt->channel_id].extra) {
yading@11:         if (pkt->type == prev_pkt[pkt->channel_id].type &&
yading@11:             pkt->data_size == prev_pkt[pkt->channel_id].data_size) {
yading@11:             mode = RTMP_PS_FOURBYTES;
yading@11:             if (pkt->ts_delta == prev_pkt[pkt->channel_id].ts_delta)
yading@11:                 mode = RTMP_PS_ONEBYTE;
yading@11:         } else {
yading@11:             mode = RTMP_PS_EIGHTBYTES;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (pkt->channel_id < 64) {
yading@11:         bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
yading@11:     } else if (pkt->channel_id < 64 + 256) {
yading@11:         bytestream_put_byte(&p, 0               | (mode << 6));
yading@11:         bytestream_put_byte(&p, pkt->channel_id - 64);
yading@11:     } else {
yading@11:         bytestream_put_byte(&p, 1               | (mode << 6));
yading@11:         bytestream_put_le16(&p, pkt->channel_id - 64);
yading@11:     }
yading@11:     if (mode != RTMP_PS_ONEBYTE) {
yading@11:         uint32_t timestamp = pkt->timestamp;
yading@11:         if (mode != RTMP_PS_TWELVEBYTES)
yading@11:             timestamp = pkt->ts_delta;
yading@11:         bytestream_put_be24(&p, timestamp >= 0xFFFFFF ? 0xFFFFFF : timestamp);
yading@11:         if (mode != RTMP_PS_FOURBYTES) {
yading@11:             bytestream_put_be24(&p, pkt->data_size);
yading@11:             bytestream_put_byte(&p, pkt->type);
yading@11:             if (mode == RTMP_PS_TWELVEBYTES)
yading@11:                 bytestream_put_le32(&p, pkt->extra);
yading@11:         }
yading@11:         if (timestamp >= 0xFFFFFF)
yading@11:             bytestream_put_be32(&p, timestamp);
yading@11:     }
yading@11:     // save history
yading@11:     prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
yading@11:     prev_pkt[pkt->channel_id].type       = pkt->type;
yading@11:     prev_pkt[pkt->channel_id].data_size  = pkt->data_size;
yading@11:     prev_pkt[pkt->channel_id].timestamp  = pkt->timestamp;
yading@11:     if (mode != RTMP_PS_TWELVEBYTES) {
yading@11:         prev_pkt[pkt->channel_id].ts_delta   = pkt->ts_delta;
yading@11:     } else {
yading@11:         prev_pkt[pkt->channel_id].ts_delta   = pkt->timestamp;
yading@11:     }
yading@11:     prev_pkt[pkt->channel_id].extra      = pkt->extra;
yading@11: 
yading@11:     if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
yading@11:         return ret;
yading@11:     size = p - pkt_hdr + pkt->data_size;
yading@11:     while (off < pkt->data_size) {
yading@11:         int towrite = FFMIN(chunk_size, pkt->data_size - off);
yading@11:         if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
yading@11:             return ret;
yading@11:         off += towrite;
yading@11:         if (off < pkt->data_size) {
yading@11:             uint8_t marker = 0xC0 | pkt->channel_id;
yading@11:             if ((ret = ffurl_write(h, &marker, 1)) < 0)
yading@11:                 return ret;
yading@11:             size++;
yading@11:         }
yading@11:     }
yading@11:     return size;
yading@11: }
yading@11: 
yading@11: int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
yading@11:                           int timestamp, int size)
yading@11: {
yading@11:     if (size) {
yading@11:         pkt->data = av_malloc(size);
yading@11:         if (!pkt->data)
yading@11:             return AVERROR(ENOMEM);
yading@11:     }
yading@11:     pkt->data_size  = size;
yading@11:     pkt->channel_id = channel_id;
yading@11:     pkt->type       = type;
yading@11:     pkt->timestamp  = timestamp;
yading@11:     pkt->extra      = 0;
yading@11:     pkt->ts_delta   = 0;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: void ff_rtmp_packet_destroy(RTMPPacket *pkt)
yading@11: {
yading@11:     if (!pkt)
yading@11:         return;
yading@11:     av_freep(&pkt->data);
yading@11:     pkt->data_size = 0;
yading@11: }
yading@11: 
yading@11: int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
yading@11: {
yading@11:     const uint8_t *base = data;
yading@11: 
yading@11:     if (data >= data_end)
yading@11:         return -1;
yading@11:     switch (*data++) {
yading@11:     case AMF_DATA_TYPE_NUMBER:      return 9;
yading@11:     case AMF_DATA_TYPE_BOOL:        return 2;
yading@11:     case AMF_DATA_TYPE_STRING:      return 3 + AV_RB16(data);
yading@11:     case AMF_DATA_TYPE_LONG_STRING: return 5 + AV_RB32(data);
yading@11:     case AMF_DATA_TYPE_NULL:        return 1;
yading@11:     case AMF_DATA_TYPE_ARRAY:
yading@11:         data += 4;
yading@11:     case AMF_DATA_TYPE_OBJECT:
yading@11:         for (;;) {
yading@11:             int size = bytestream_get_be16(&data);
yading@11:             int t;
yading@11:             if (!size) {
yading@11:                 data++;
yading@11:                 break;
yading@11:             }
yading@11:             if (size < 0 || size >= data_end - data)
yading@11:                 return -1;
yading@11:             data += size;
yading@11:             t = ff_amf_tag_size(data, data_end);
yading@11:             if (t < 0 || t >= data_end - data)
yading@11:                 return -1;
yading@11:             data += t;
yading@11:         }
yading@11:         return data - base;
yading@11:     case AMF_DATA_TYPE_OBJECT_END:  return 1;
yading@11:     default:                        return -1;
yading@11:     }
yading@11: }
yading@11: 
yading@11: int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
yading@11:                            const uint8_t *name, uint8_t *dst, int dst_size)
yading@11: {
yading@11:     int namelen = strlen(name);
yading@11:     int len;
yading@11: 
yading@11:     while (*data != AMF_DATA_TYPE_OBJECT && data < data_end) {
yading@11:         len = ff_amf_tag_size(data, data_end);
yading@11:         if (len < 0)
yading@11:             len = data_end - data;
yading@11:         data += len;
yading@11:     }
yading@11:     if (data_end - data < 3)
yading@11:         return -1;
yading@11:     data++;
yading@11:     for (;;) {
yading@11:         int size = bytestream_get_be16(&data);
yading@11:         if (!size)
yading@11:             break;
yading@11:         if (size < 0 || size >= data_end - data)
yading@11:             return -1;
yading@11:         data += size;
yading@11:         if (size == namelen && !memcmp(data-size, name, namelen)) {
yading@11:             switch (*data++) {
yading@11:             case AMF_DATA_TYPE_NUMBER:
yading@11:                 snprintf(dst, dst_size, "%g", av_int2double(AV_RB64(data)));
yading@11:                 break;
yading@11:             case AMF_DATA_TYPE_BOOL:
yading@11:                 snprintf(dst, dst_size, "%s", *data ? "true" : "false");
yading@11:                 break;
yading@11:             case AMF_DATA_TYPE_STRING:
yading@11:                 len = bytestream_get_be16(&data);
yading@11:                 av_strlcpy(dst, data, FFMIN(len+1, dst_size));
yading@11:                 break;
yading@11:             default:
yading@11:                 return -1;
yading@11:             }
yading@11:             return 0;
yading@11:         }
yading@11:         len = ff_amf_tag_size(data, data_end);
yading@11:         if (len < 0 || len >= data_end - data)
yading@11:             return -1;
yading@11:         data += len;
yading@11:     }
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: static const char* rtmp_packet_type(int type)
yading@11: {
yading@11:     switch (type) {
yading@11:     case RTMP_PT_CHUNK_SIZE:     return "chunk size";
yading@11:     case RTMP_PT_BYTES_READ:     return "bytes read";
yading@11:     case RTMP_PT_PING:           return "ping";
yading@11:     case RTMP_PT_SERVER_BW:      return "server bandwidth";
yading@11:     case RTMP_PT_CLIENT_BW:      return "client bandwidth";
yading@11:     case RTMP_PT_AUDIO:          return "audio packet";
yading@11:     case RTMP_PT_VIDEO:          return "video packet";
yading@11:     case RTMP_PT_FLEX_STREAM:    return "Flex shared stream";
yading@11:     case RTMP_PT_FLEX_OBJECT:    return "Flex shared object";
yading@11:     case RTMP_PT_FLEX_MESSAGE:   return "Flex shared message";
yading@11:     case RTMP_PT_NOTIFY:         return "notification";
yading@11:     case RTMP_PT_SHARED_OBJ:     return "shared object";
yading@11:     case RTMP_PT_INVOKE:         return "invoke";
yading@11:     case RTMP_PT_METADATA:       return "metadata";
yading@11:     default:                     return "unknown";
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void ff_amf_tag_contents(void *ctx, const uint8_t *data, const uint8_t *data_end)
yading@11: {
yading@11:     unsigned int size;
yading@11:     char buf[1024];
yading@11: 
yading@11:     if (data >= data_end)
yading@11:         return;
yading@11:     switch (*data++) {
yading@11:     case AMF_DATA_TYPE_NUMBER:
yading@11:         av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
yading@11:         return;
yading@11:     case AMF_DATA_TYPE_BOOL:
yading@11:         av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
yading@11:         return;
yading@11:     case AMF_DATA_TYPE_STRING:
yading@11:     case AMF_DATA_TYPE_LONG_STRING:
yading@11:         if (data[-1] == AMF_DATA_TYPE_STRING) {
yading@11:             size = bytestream_get_be16(&data);
yading@11:         } else {
yading@11:             size = bytestream_get_be32(&data);
yading@11:         }
yading@11:         size = FFMIN(size, sizeof(buf) - 1);
yading@11:         memcpy(buf, data, size);
yading@11:         buf[size] = 0;
yading@11:         av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
yading@11:         return;
yading@11:     case AMF_DATA_TYPE_NULL:
yading@11:         av_log(ctx, AV_LOG_DEBUG, " NULL\n");
yading@11:         return;
yading@11:     case AMF_DATA_TYPE_ARRAY:
yading@11:         data += 4;
yading@11:     case AMF_DATA_TYPE_OBJECT:
yading@11:         av_log(ctx, AV_LOG_DEBUG, " {\n");
yading@11:         for (;;) {
yading@11:             int t;
yading@11:             size = bytestream_get_be16(&data);
yading@11:             av_strlcpy(buf, data, FFMIN(sizeof(buf), size + 1));
yading@11:             if (!size) {
yading@11:                 av_log(ctx, AV_LOG_DEBUG, " }\n");
yading@11:                 data++;
yading@11:                 break;
yading@11:             }
yading@11:             if (size >= data_end - data)
yading@11:                 return;
yading@11:             data += size;
yading@11:             av_log(ctx, AV_LOG_DEBUG, "  %s: ", buf);
yading@11:             ff_amf_tag_contents(ctx, data, data_end);
yading@11:             t = ff_amf_tag_size(data, data_end);
yading@11:             if (t < 0 || t >= data_end - data)
yading@11:                 return;
yading@11:             data += t;
yading@11:         }
yading@11:         return;
yading@11:     case AMF_DATA_TYPE_OBJECT_END:
yading@11:         av_log(ctx, AV_LOG_DEBUG, " }\n");
yading@11:         return;
yading@11:     default:
yading@11:         return;
yading@11:     }
yading@11: }
yading@11: 
yading@11: void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
yading@11: {
yading@11:     av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
yading@11:            rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->data_size);
yading@11:     if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
yading@11:         uint8_t *src = p->data, *src_end = p->data + p->data_size;
yading@11:         while (src < src_end) {
yading@11:             int sz;
yading@11:             ff_amf_tag_contents(ctx, src, src_end);
yading@11:             sz = ff_amf_tag_size(src, src_end);
yading@11:             if (sz < 0)
yading@11:                 break;
yading@11:             src += sz;
yading@11:         }
yading@11:     } else if (p->type == RTMP_PT_SERVER_BW){
yading@11:         av_log(ctx, AV_LOG_DEBUG, "Server BW = %d\n", AV_RB32(p->data));
yading@11:     } else if (p->type == RTMP_PT_CLIENT_BW){
yading@11:         av_log(ctx, AV_LOG_DEBUG, "Client BW = %d\n", AV_RB32(p->data));
yading@11:     } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
yading@11:         int i;
yading@11:         for (i = 0; i < p->data_size; i++)
yading@11:             av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
yading@11:         av_log(ctx, AV_LOG_DEBUG, "\n");
yading@11:     }
yading@11: }