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Move functions and structs shared between MMSH and MMST into their own file,

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mms.c. Patch by Zhentan Feng <spyfeng gmail com>.

Originally committed as revision 24779 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Zhentan Feng 2010-08-11 22:50:17 +00:00 committed by Ronald S. Bultje
parent edce93536a
commit fcd11c61ea
2 changed files with 6 additions and 120 deletions
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2
libavformat/Makefile
View File

@ -288,7 +288,7 @@ OBJS+= avio.o aviobuf.o
OBJS-$(CONFIG_FILE_PROTOCOL) += file.o
OBJS-$(CONFIG_GOPHER_PROTOCOL) += gopher.o
OBJS-$(CONFIG_HTTP_PROTOCOL) += http.o httpauth.o
OBJS-$(CONFIG_MMST_PROTOCOL) += mmst.o asf.o
OBJS-$(CONFIG_MMST_PROTOCOL) += mmst.o mms.o asf.o
OBJS-$(CONFIG_MD5_PROTOCOL) += md5proto.o
OBJS-$(CONFIG_PIPE_PROTOCOL) += file.o

124
libavformat/mmst.c
View File

@ -29,6 +29,7 @@
*/
#include "avformat.h"
#include "mms.h"
#include "internal.h"
#include "libavutil/intreadwrite.h"
#include "libavcodec/bytestream.h"
@ -83,40 +84,6 @@ typedef enum {
/*@}*/
} MMSSCPacketType;
typedef struct {
int id;
}MMSStream;
typedef struct {
URLContext *mms_hd; ///< TCP connection handle
MMSStream streams[MAX_STREAMS];
/** Buffer for outgoing packets. */
/*@{*/
uint8_t *write_out_ptr; ///< Pointer for writting the buffer.
uint8_t out_buffer[512]; ///< Buffer for outgoing packet.
/*@}*/
/** Buffer for incoming packets. */
/*@{*/
uint8_t in_buffer[8192]; ///< Buffer for incoming packets.
uint8_t *read_in_ptr; ///< Pointer for reading from incoming buffer.
int remaining_in_len; ///< Reading length from incoming buffer.
/*@}*/
/** Internal handling of the ASF header */
/*@{*/
uint8_t *asf_header; ///< Stored ASF header.
int asf_header_size; ///< Size of stored ASF header.
int header_parsed; ///< The header has been received and parsed.
int asf_packet_len;
int asf_header_read_size;
/*@}*/
int stream_num; ///< stream numbers.
} MMSContext;
typedef struct {
MMSContext mms;
int outgoing_packet_seq; ///< Outgoing packet sequence number.
@ -466,67 +433,6 @@ static int send_startup_packet(MMSTContext *mmst)
return send_command_packet(mmst);
}
static int asf_header_parser(MMSContext *mms)
{
uint8_t *p = mms->asf_header;
uint8_t *end;
int flags, stream_id;
mms->stream_num = 0;
if (mms->asf_header_size < sizeof(ff_asf_guid) * 2 + 22 ||
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;
p += sizeof(ff_asf_guid) + 14;
while(end - p >= sizeof(ff_asf_guid) + 8) {
uint64_t chunksize = AV_RL64(p + sizeof(ff_asf_guid));
if (!chunksize || chunksize > end - p) {
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)) {
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))) {
flags = AV_RL16(p + sizeof(ff_asf_guid)*3 + 24);
stream_id = flags & 0x7F;
//The second condition is for checking CS_PKT_STREAM_ID_REQUEST packet size,
//we can calcuate the packet size by stream_num.
//Please see function send_stream_selection_request().
if (mms->stream_num < MAX_STREAMS &&
46 + mms->stream_num * 6 < sizeof(mms->out_buffer)) {
mms->streams[mms->stream_num].id = stream_id;
mms->stream_num++;
} else {
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.
}
p += chunksize;
}
return 0;
}
/** Send MMST stream selection command based on the AVStream->discard values. */
static int send_stream_selection_request(MMSTContext *mmst)
{
@ -543,16 +449,6 @@ static int send_stream_selection_request(MMSTContext *mmst)
return send_command_packet(mmst);
}
static int read_data(MMSContext *mms, uint8_t *buf, const int buf_size)
{
int read_size;
read_size = FFMIN(buf_size, mms->remaining_in_len);
memcpy(buf, mms->read_in_ptr, read_size);
mms->remaining_in_len -= read_size;
mms->read_in_ptr += read_size;
return read_size;
}
static int send_close_packet(MMSTContext *mmst)
{
start_command_packet(mmst, CS_PKT_STREAM_CLOSE);
@ -652,7 +548,7 @@ static int mms_open(URLContext *h, const char *uri, int flags)
goto fail;
if((mmst->incoming_flags != 0X08) && (mmst->incoming_flags != 0X0C))
goto fail;
err = asf_header_parser(mms);
err = ff_mms_asf_header_parser(mms);
if (err) {
dprintf(NULL, "asf header parsed failed!\n");
goto fail;
@ -686,25 +582,15 @@ static int mms_read(URLContext *h, uint8_t *buf, int size)
MMSTContext *mmst = h->priv_data;
MMSContext *mms = &mmst->mms;
int result = 0;
int size_to_copy;
do {
if(mms->asf_header_read_size < mms->asf_header_size) {
/* Read from ASF header buffer */
size_to_copy= FFMIN(size,
mms->asf_header_size - mms->asf_header_read_size);
memcpy(buf, mms->asf_header + mms->asf_header_read_size, size_to_copy);
mms->asf_header_read_size += size_to_copy;
result += size_to_copy;
dprintf(NULL, "Copied %d bytes from stored header. left: %d\n",
size_to_copy, mms->asf_header_size - mms->asf_header_read_size);
if (mms->asf_header_size == mms->asf_header_read_size) {
av_freep(&mms->asf_header);
}
result = ff_mms_read_header(mms, buf, size);
} else if(mms->remaining_in_len) {
/* Read remaining packet data to buffer.
* the result can not be zero because remaining_in_len is positive.*/
result = read_data(mms, buf, size);
result = ff_mms_read_data(mms, buf, size);
} else {
/* Read from network */
int err = mms_safe_send_recv(mmst, NULL, SC_PKT_ASF_MEDIA);
@ -716,7 +602,7 @@ static int mms_read(URLContext *h, uint8_t *buf, int size)
result= AVERROR_IO;
} else {
// copy the data to the packet buffer.
result = read_data(mms, buf, size);
result = ff_mms_read_data(mms, buf, size);
if (result == 0) {
dprintf(NULL, "read asf media paket size is zero!\n");
break;