/*
* RTMP input format
- * Copyright (c) 2009 Kostya Shishkov
+ * Copyright (c) 2009 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; 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)
{
void ff_amf_write_number(uint8_t **dst, double val)
{
bytestream_put_byte(dst, AMF_DATA_TYPE_NUMBER);
- bytestream_put_be64(dst, av_dbl2int(val));
+ bytestream_put_be64(dst, av_double2int(val));
}
void ff_amf_write_string(uint8_t **dst, const char *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);
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 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 hdr, t, buf[16];
- int channel_id, timestamp, data_size, offset = 0;
+
+ 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;
- if (url_read(h, &hdr, 1) != 1)
- return AVERROR(EIO);
+ written++;
channel_id = hdr & 0x3F;
if (channel_id < 2) { //special case for channel number >= 64
buf[1] = 0;
- if (url_read_complete(h, buf, channel_id + 1) != channel_id + 1)
+ 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;
}
- data_size = prev_pkt[channel_id].data_size;
- type = prev_pkt[channel_id].type;
- extra = prev_pkt[channel_id].extra;
+ 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;
+ hdr >>= 6; // header size indicator
if (hdr == RTMP_PS_ONEBYTE) {
- timestamp = prev_pkt[channel_id].timestamp;
+ ts_field = prev_pkt[channel_id].ts_field;
} else {
- if (url_read_complete(h, buf, 3) != 3)
+ if (ffurl_read_complete(h, buf, 3) != 3)
return AVERROR(EIO);
- timestamp = AV_RB24(buf);
+ written += 3;
+ ts_field = AV_RB24(buf);
if (hdr != RTMP_PS_FOURBYTES) {
- if (url_read_complete(h, buf, 3) != 3)
+ if (ffurl_read_complete(h, buf, 3) != 3)
return AVERROR(EIO);
- data_size = AV_RB24(buf);
- if (url_read_complete(h, &type, 1) != 1)
+ 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 (url_read_complete(h, buf, 4) != 4)
+ if (ffurl_read_complete(h, buf, 4) != 4)
return AVERROR(EIO);
+ written += 4;
extra = AV_RL32(buf);
}
}
}
- if (ff_rtmp_packet_create(p, channel_id, type, timestamp, data_size))
- return -1;
+ 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].data_size = data_size;
- prev_pkt[channel_id].timestamp = timestamp;
+ prev_pkt[channel_id].size = size;
prev_pkt[channel_id].extra = extra;
- while (data_size > 0) {
- int toread = FFMIN(data_size, chunk_size);
- if (url_read_complete(h, p->data + offset, toread) != toread) {
- ff_rtmp_packet_destroy(p);
+ 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);
- }
- data_size -= chunk_size;
- offset += chunk_size;
- if (data_size > 0) {
- url_read_complete(h, &t, 1); //marker
- if (t != (0xC0 + channel_id))
- return -1;
- }
}
- return 0;
}
int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
- int chunk_size, RTMPPacket *prev_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;
+ }
+ }
- //TODO: header compression
- bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
+ 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->timestamp);
+ bytestream_put_be24(&p, pkt->ts_field);
if (mode != RTMP_PS_FOURBYTES) {
- bytestream_put_be24(&p, pkt->data_size);
+ bytestream_put_be24(&p, pkt->size);
bytestream_put_byte(&p, pkt->type);
if (mode == RTMP_PS_TWELVEBYTES)
bytestream_put_le32(&p, pkt->extra);
}
}
- url_write(h, pkt_hdr, p-pkt_hdr);
- while (off < pkt->data_size) {
- int towrite = FFMIN(chunk_size, pkt->data_size - off);
- url_write(h, pkt->data + off, towrite);
+ 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->data_size) {
+ if (off < pkt->size) {
uint8_t marker = 0xC0 | pkt->channel_id;
- url_write(h, &marker, 1);
+ 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 0;
+ return written;
}
int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
int timestamp, int size)
{
- pkt->data = av_malloc(size);
- if (!pkt->data)
- return AVERROR(ENOMEM);
- pkt->data_size = 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;
}
if (!pkt)
return;
av_freep(&pkt->data);
- pkt->data_size = 0;
+ 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 (*data++) {
+ 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:
- data += 4;
+ parse_key = 0;
+ case AMF_DATA_TYPE_MIXEDARRAY:
+ nb = bytestream_get_be32(&data);
case AMF_DATA_TYPE_OBJECT:
- for (;;) {
- int size = bytestream_get_be16(&data);
+ while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
int t;
- if (!size) {
- data++;
- break;
+ if (parse_key) {
+ int size = bytestream_get_be16(&data);
+ if (!size) {
+ data++;
+ break;
+ }
+ if (size < 0 || size >= data_end - data)
+ return -1;
+ data += size;
}
- if (data + size >= data_end || data + size < data)
- return -1;
- data += size;
t = ff_amf_tag_size(data, data_end);
- if (t < 0 || data + t >= data_end)
+ if (t < 0 || t >= data_end - data)
return -1;
data += t;
}
int size = bytestream_get_be16(&data);
if (!size)
break;
- if (data + size >= data_end || data + size < data)
+ 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_int2dbl(AV_RB64(data)));
+ snprintf(dst, dst_size, "%g", av_int2double(AV_RB64(data)));
break;
case AMF_DATA_TYPE_BOOL:
snprintf(dst, dst_size, "%s", *data ? "true" : "false");
return 0;
}
len = ff_amf_tag_size(data, data_end);
- if (len < 0 || data + len >= data_end || data + len < data)
+ 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);
+}
projects / ffmpeg / blobdiff