| /* |
| * 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_get_string(GetByteContext *bc, uint8_t *str, |
| int strsize, int *length) |
| { |
| int stringlen = 0; |
| int readsize; |
| 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_string(GetByteContext *bc, uint8_t *str, |
| int strsize, int *length) |
| { |
| if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING) |
| return AVERROR_INVALIDDATA; |
| return ff_amf_get_string(bc, str, strsize, length); |
| } |
| |
| 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 ts_field; // non-extended timestamp or delta field |
| 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; // header size indicator |
| if (hdr == RTMP_PS_ONEBYTE) { |
| ts_field = prev_pkt[channel_id].ts_field; |
| } else { |
| if (ffurl_read_complete(h, buf, 3) != 3) |
| return AVERROR(EIO); |
| written += 3; |
| ts_field = 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 (ts_field == 0xFFFFFF) { |
| if (ffurl_read_complete(h, buf, 4) != 4) |
| return AVERROR(EIO); |
| timestamp = AV_RB32(buf); |
| } else { |
| timestamp = ts_field; |
| } |
| 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_field = ts_field; |
| 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_field = prev->ts_field; |
| 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; |
| p->data = NULL; |
| 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; |
| int use_delta; // flag if using timestamp delta, not RTMP_PS_TWELVEBYTES |
| uint32_t timestamp; // full 32-bit timestamp or delta value |
| |
| if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt, |
| pkt->channel_id)) < 0) |
| return ret; |
| prev_pkt = *prev_pkt_ptr; |
| |
| //if channel_id = 0, this is first presentation of prev_pkt, send full hdr. |
| use_delta = prev_pkt[pkt->channel_id].channel_id && |
| pkt->extra == prev_pkt[pkt->channel_id].extra && |
| pkt->timestamp >= prev_pkt[pkt->channel_id].timestamp; |
| |
| timestamp = pkt->timestamp; |
| if (use_delta) { |
| timestamp -= prev_pkt[pkt->channel_id].timestamp; |
| } |
| if (timestamp >= 0xFFFFFF) { |
| pkt->ts_field = 0xFFFFFF; |
| } else { |
| pkt->ts_field = timestamp; |
| } |
| |
| if (use_delta) { |
| if (pkt->type == prev_pkt[pkt->channel_id].type && |
| pkt->size == prev_pkt[pkt->channel_id].size) { |
| mode = RTMP_PS_FOURBYTES; |
| if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field) |
| 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) { |
| bytestream_put_be24(&p, pkt->ts_field); |
| 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 (pkt->ts_field == 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; |
| prev_pkt[pkt->channel_id].ts_field = pkt->ts_field; |
| 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++; |
| if (pkt->ts_field == 0xFFFFFF) { |
| uint8_t ts_header[4]; |
| AV_WB32(ts_header, timestamp); |
| if ((ret = ffurl_write(h, ts_header, 4)) < 0) |
| return ret; |
| written += 4; |
| } |
| } |
| } |
| return written; |
| } |
| |
| int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type, |
| int timestamp, int size) |
| { |
| if (size) { |
| pkt->data = av_realloc(NULL, 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_field = 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_DATE: return 11; |
| 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); |
| } |
