[SCM] libav/experimental: Use av_log(.., AV_LOG_ERROR) instead of dprintf() for logging errors. This should help in making mmst a little more userfriendly, or at least debuggable. Also use helpful error return values instead of -1.
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 17:12:43 UTC 2013
The following commit has been merged in the experimental branch:
commit 540ab68c645aff0edffed3c0d3480ffd473f41d8
Author: Ronald S. Bultje <rsbultje at gmail.com>
Date: Mon Jul 26 22:21:14 2010 +0000
Use av_log(.., AV_LOG_ERROR) instead of dprintf() for logging errors. This
should help in making mmst a little more userfriendly, or at least debuggable.
Also use helpful error return values instead of -1.
Originally committed as revision 24515 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavformat/mmst.c b/libavformat/mmst.c
index f0f4217..84a06fb 100644
--- a/libavformat/mmst.c
+++ b/libavformat/mmst.c
@@ -170,8 +170,11 @@ static int send_command_packet(MMSContext *mms)
// write it out.
write_result= url_write(mms->mms_hd, mms->out_buffer, exact_length);
if(write_result != exact_length) {
- dprintf(NULL, "url_write returned: %d != %d\n",
- write_result, exact_length);
+ av_log(NULL, AV_LOG_ERROR,
+ "Failed to write data of length %d: %d (%s)\n",
+ exact_length, write_result,
+ write_result < 0 ? strerror(write_result) :
+ "The server closed the connection");
return AVERROR_IO;
}
@@ -277,26 +280,37 @@ static MMSSCPacketType get_tcp_server_response(MMSContext *mms)
// read the rest of the packet.
if (length_remaining < 0
|| length_remaining > sizeof(mms->in_buffer) - 12) {
- dprintf(NULL, "Incoming message len %d exceeds buffer len %d\n",
- length_remaining, sizeof(mms->in_buffer) - 12);
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Incoming packet length %d exceeds bufsize %zu\n",
+ length_remaining, sizeof(mms->in_buffer) - 12);
+ return AVERROR_INVALIDDATA;
}
read_result = url_read_complete(mms->mms_hd, mms->in_buffer + 12,
length_remaining) ;
if (read_result == length_remaining) {
packet_type= AV_RL16(mms->in_buffer+36);
} else {
- dprintf(NULL, "read for packet type failed%d!\n", read_result);
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Reading pkt data (length=%d) failed: %d (%s)\n",
+ length_remaining, read_result,
+ read_result < 0 ? strerror(read_result) :
+ "The server closed the connection");
+ return read_result < 0 ? read_result : AVERROR_IO;
}
hr = AV_RL32(mms->in_buffer + 40);
if (hr) {
- dprintf(NULL, "The server side send back error code:0x%x\n", hr);
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Server sent an error status code: 0x%08x\n",
+ hr);
+ return AVERROR_UNKNOWN;
}
} else {
- dprintf(NULL, "read for length remaining failed%d!\n", read_result);
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Reading command packet length failed: %d (%s)\n",
+ read_result,
+ read_result < 0 ? strerror(read_result) :
+ "The server closed the connection");
+ return read_result < 0 ? read_result : AVERROR_IO;
}
} else {
int length_remaining;
@@ -313,17 +327,21 @@ static MMSSCPacketType get_tcp_server_response(MMSContext *mms)
if (length_remaining < 0
|| length_remaining > sizeof(mms->in_buffer) - 8) {
- dprintf(NULL, "Incoming data len %d exceeds buffer len %d\n",
- length_remaining, sizeof(mms->in_buffer));
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Data length %d is invalid or too large (max=%zu)\n",
+ length_remaining, sizeof(mms->in_buffer));
+ return AVERROR_INVALIDDATA;
}
mms->remaining_in_len = length_remaining;
mms->read_in_ptr = mms->in_buffer;
read_result= url_read_complete(mms->mms_hd, mms->in_buffer, length_remaining);
if(read_result != length_remaining) {
- dprintf(NULL, "read_bytes result: %d asking for %d\n",
- read_result, length_remaining);
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Failed to read packet data of size %d: %d (%s)\n",
+ length_remaining, read_result,
+ read_result < 0 ? strerror(read_result) :
+ "The server closed the connection");
+ return read_result < 0 ? read_result : AVERROR_IO;
} else {
// if we successfully read everything.
if(packet_id_type == mms->header_packet_id) {
@@ -367,10 +385,13 @@ static MMSSCPacketType get_tcp_server_response(MMSContext *mms)
return packet_type;
} else {
if(read_result<0) {
- dprintf(NULL, "Read error (or cancelled) returned %d!\n", read_result);
+ av_log(NULL, AV_LOG_ERROR,
+ "Error reading packet header: %d (%s)\n",
+ read_result, strerror(read_result));
packet_type = SC_PKT_CANCEL;
} else {
- dprintf(NULL, "Read result of zero?!\n");
+ av_log(NULL, AV_LOG_ERROR,
+ "The server closed the connection\n");
packet_type = SC_PKT_NO_DATA;
}
return packet_type;
@@ -392,8 +413,10 @@ static int mms_safe_send_recv(MMSContext *mms,
}
if ((type = get_tcp_server_response(mms)) != expect_type) {
- dprintf(NULL,"Unexpected packet type %d with type %d\n", type, expect_type);
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Corrupt stream (unexpected packet type 0x%x, expected 0x%x)\n",
+ type, expect_type);
+ return AVERROR_INVALIDDATA;
} else {
return 0;
}
@@ -446,8 +469,12 @@ static int asf_header_parser(MMSContext *mms)
mms->stream_num = 0;
if (mms->asf_header_size < sizeof(ff_asf_guid) * 2 + 22 ||
- memcmp(p, ff_asf_header, sizeof(ff_asf_guid)))
- return -1;
+ memcmp(p, ff_asf_header, sizeof(ff_asf_guid))) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Corrupt stream (invalid ASF header, size=%d)\n",
+ mms->asf_header_size);
+ return AVERROR_INVALIDDATA;
+ }
end = mms->asf_header + mms->asf_header_size;
@@ -455,17 +482,20 @@ static int asf_header_parser(MMSContext *mms)
while(end - p >= sizeof(ff_asf_guid) + 8) {
uint64_t chunksize = AV_RL64(p + sizeof(ff_asf_guid));
if (!chunksize || chunksize > end - p) {
- dprintf(NULL, "chunksize is exceptional value:%"PRId64"!\n", chunksize);
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Corrupt stream (header chunksize %"PRId64" is invalid)\n",
+ chunksize);
+ return AVERROR_INVALIDDATA;
}
if (!memcmp(p, ff_asf_file_header, sizeof(ff_asf_guid))) {
/* read packet size */
if (end - p > sizeof(ff_asf_guid) * 2 + 68) {
mms->asf_packet_len = AV_RL32(p + sizeof(ff_asf_guid) * 2 + 64);
if (mms->asf_packet_len <= 0 || mms->asf_packet_len > sizeof(mms->in_buffer)) {
- dprintf(NULL,"Too large packet len:%d"
- " may overwrite in_buffer when padding", mms->asf_packet_len);
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Corrupt stream (too large pkt_len %d)\n",
+ mms->asf_packet_len);
+ return AVERROR_INVALIDDATA;
}
}
} else if (!memcmp(p, ff_asf_stream_header, sizeof(ff_asf_guid))) {
@@ -479,8 +509,9 @@ static int asf_header_parser(MMSContext *mms)
mms->streams[mms->stream_num].id = stream_id;
mms->stream_num++;
} else {
- dprintf(NULL, "Too many streams.\n");
- return -1;
+ av_log(NULL, AV_LOG_ERROR,
+ "Corrupt stream (too many A/V streams)\n");
+ return AVERROR_INVALIDDATA;
}
} else if (!memcmp(p, ff_asf_head1_guid, sizeof(ff_asf_guid))) {
chunksize = 46; // see references [2] section 3.4. This should be set 46.
@@ -546,9 +577,9 @@ static int read_mms_packet(MMSContext *mms, uint8_t *buf, int buf_size)
int err = mms_safe_send_recv(mms, NULL, SC_PKT_ASF_MEDIA);
if (err == 0) {
if(mms->remaining_in_len>mms->asf_packet_len) {
- dprintf(NULL, "Incoming packet"
- "larger than the asf packet size stated (%d>%d)\n",
- mms->remaining_in_len, mms->asf_packet_len);
+ av_log(NULL, AV_LOG_ERROR,
+ "Incoming pktlen %d is larger than ASF pktsize %d\n",
+ mms->remaining_in_len, mms->asf_packet_len);
result= AVERROR_IO;
} else {
// copy the data to the packet buffer.
--
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