00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026
00027
00028 #include <string.h>
00029 #include "libavutil/intreadwrite.h"
00030 #include "libavutil/avstring.h"
00031 #include "libavutil/opt.h"
00032 #include "internal.h"
00033 #include "mms.h"
00034 #include "asf.h"
00035 #include "http.h"
00036 #include "url.h"
00037
00038 #define CHUNK_HEADER_LENGTH 4 // 2bytes chunk type and 2bytes chunk length.
00039 #define EXT_HEADER_LENGTH 8 // 4bytes sequence, 2bytes useless and 2bytes chunk length.
00040
00041
00042 #define USERAGENT "User-Agent: NSPlayer/4.1.0.3856\r\n"
00043
00044
00045 #define CLIENTGUID "Pragma: xClientGUID={c77e7400-738a-11d2-9add-0020af0a3278}\r\n"
00046
00047
00048
00049
00050 typedef enum {
00051 CHUNK_TYPE_DATA = 0x4424,
00052 CHUNK_TYPE_ASF_HEADER = 0x4824,
00053 CHUNK_TYPE_END = 0x4524,
00054 CHUNK_TYPE_STREAM_CHANGE = 0x4324,
00055 } ChunkType;
00056
00057 typedef struct {
00058 MMSContext mms;
00059 int request_seq;
00060 int chunk_seq;
00061 } MMSHContext;
00062
00063 static int mmsh_close(URLContext *h)
00064 {
00065 MMSHContext *mmsh = (MMSHContext *)h->priv_data;
00066 MMSContext *mms = &mmsh->mms;
00067 if (mms->mms_hd)
00068 ffurl_close(mms->mms_hd);
00069 av_free(mms->streams);
00070 av_free(mms->asf_header);
00071 return 0;
00072 }
00073
00074 static ChunkType get_chunk_header(MMSHContext *mmsh, int *len)
00075 {
00076 MMSContext *mms = &mmsh->mms;
00077 uint8_t chunk_header[CHUNK_HEADER_LENGTH];
00078 uint8_t ext_header[EXT_HEADER_LENGTH];
00079 ChunkType chunk_type;
00080 int chunk_len, res, ext_header_len;
00081
00082 res = ffurl_read_complete(mms->mms_hd, chunk_header, CHUNK_HEADER_LENGTH);
00083 if (res != CHUNK_HEADER_LENGTH) {
00084 av_log(NULL, AV_LOG_ERROR, "Read data packet header failed!\n");
00085 return AVERROR(EIO);
00086 }
00087 chunk_type = AV_RL16(chunk_header);
00088 chunk_len = AV_RL16(chunk_header + 2);
00089
00090 switch (chunk_type) {
00091 case CHUNK_TYPE_END:
00092 case CHUNK_TYPE_STREAM_CHANGE:
00093 ext_header_len = 4;
00094 break;
00095 case CHUNK_TYPE_ASF_HEADER:
00096 case CHUNK_TYPE_DATA:
00097 ext_header_len = 8;
00098 break;
00099 default:
00100 av_log(NULL, AV_LOG_ERROR, "Strange chunk type %d\n", chunk_type);
00101 return AVERROR_INVALIDDATA;
00102 }
00103
00104 res = ffurl_read_complete(mms->mms_hd, ext_header, ext_header_len);
00105 if (res != ext_header_len) {
00106 av_log(NULL, AV_LOG_ERROR, "Read ext header failed!\n");
00107 return AVERROR(EIO);
00108 }
00109 *len = chunk_len - ext_header_len;
00110 if (chunk_type == CHUNK_TYPE_END || chunk_type == CHUNK_TYPE_DATA)
00111 mmsh->chunk_seq = AV_RL32(ext_header);
00112 return chunk_type;
00113 }
00114
00115 static int read_data_packet(MMSHContext *mmsh, const int len)
00116 {
00117 MMSContext *mms = &mmsh->mms;
00118 int res;
00119 if (len > sizeof(mms->in_buffer)) {
00120 av_log(NULL, AV_LOG_ERROR,
00121 "Data packet length %d exceeds the in_buffer size %zu\n",
00122 len, sizeof(mms->in_buffer));
00123 return AVERROR(EIO);
00124 }
00125 res = ffurl_read_complete(mms->mms_hd, mms->in_buffer, len);
00126 av_dlog(NULL, "Data packet len = %d\n", len);
00127 if (res != len) {
00128 av_log(NULL, AV_LOG_ERROR, "Read data packet failed!\n");
00129 return AVERROR(EIO);
00130 }
00131 if (len > mms->asf_packet_len) {
00132 av_log(NULL, AV_LOG_ERROR,
00133 "Chunk length %d exceed packet length %d\n",len, mms->asf_packet_len);
00134 return AVERROR_INVALIDDATA;
00135 } else {
00136 memset(mms->in_buffer + len, 0, mms->asf_packet_len - len);
00137 }
00138 mms->read_in_ptr = mms->in_buffer;
00139 mms->remaining_in_len = mms->asf_packet_len;
00140 return 0;
00141 }
00142
00143 static int get_http_header_data(MMSHContext *mmsh)
00144 {
00145 MMSContext *mms = &mmsh->mms;
00146 int res, len;
00147 ChunkType chunk_type;
00148
00149 for (;;) {
00150 len = 0;
00151 res = chunk_type = get_chunk_header(mmsh, &len);
00152 if (res < 0) {
00153 return res;
00154 } else if (chunk_type == CHUNK_TYPE_ASF_HEADER){
00155
00156 if (!mms->header_parsed) {
00157 if (mms->asf_header) {
00158 if (len != mms->asf_header_size) {
00159 mms->asf_header_size = len;
00160 av_dlog(NULL, "Header len changed from %d to %d\n",
00161 mms->asf_header_size, len);
00162 av_freep(&mms->asf_header);
00163 }
00164 }
00165 mms->asf_header = av_mallocz(len);
00166 if (!mms->asf_header) {
00167 return AVERROR(ENOMEM);
00168 }
00169 mms->asf_header_size = len;
00170 }
00171 if (len > mms->asf_header_size) {
00172 av_log(NULL, AV_LOG_ERROR,
00173 "Asf header packet len = %d exceed the asf header buf size %d\n",
00174 len, mms->asf_header_size);
00175 return AVERROR(EIO);
00176 }
00177 res = ffurl_read_complete(mms->mms_hd, mms->asf_header, len);
00178 if (res != len) {
00179 av_log(NULL, AV_LOG_ERROR,
00180 "Recv asf header data len %d != expected len %d\n", res, len);
00181 return AVERROR(EIO);
00182 }
00183 mms->asf_header_size = len;
00184 if (!mms->header_parsed) {
00185 res = ff_mms_asf_header_parser(mms);
00186 mms->header_parsed = 1;
00187 return res;
00188 }
00189 } else if (chunk_type == CHUNK_TYPE_DATA) {
00190
00191 return read_data_packet(mmsh, len);
00192 } else {
00193 if (len) {
00194 if (len > sizeof(mms->in_buffer)) {
00195 av_log(NULL, AV_LOG_ERROR,
00196 "Other packet len = %d exceed the in_buffer size %zu\n",
00197 len, sizeof(mms->in_buffer));
00198 return AVERROR(EIO);
00199 }
00200 res = ffurl_read_complete(mms->mms_hd, mms->in_buffer, len);
00201 if (res != len) {
00202 av_log(NULL, AV_LOG_ERROR, "Read other chunk type data failed!\n");
00203 return AVERROR(EIO);
00204 } else {
00205 av_dlog(NULL, "Skip chunk type %d \n", chunk_type);
00206 continue;
00207 }
00208 }
00209 }
00210 }
00211 }
00212
00213 static int mmsh_open(URLContext *h, const char *uri, int flags)
00214 {
00215 int i, port, err;
00216 char httpname[256], path[256], host[128], location[1024];
00217 char *stream_selection = NULL;
00218 char headers[1024];
00219 MMSHContext *mmsh = h->priv_data;
00220 MMSContext *mms;
00221
00222 mmsh->request_seq = h->is_streamed = 1;
00223 mms = &mmsh->mms;
00224 av_strlcpy(location, uri, sizeof(location));
00225
00226 av_url_split(NULL, 0, NULL, 0,
00227 host, sizeof(host), &port, path, sizeof(path), location);
00228 if (port<0)
00229 port = 80;
00230 ff_url_join(httpname, sizeof(httpname), "http", NULL, host, port, "%s", path);
00231
00232 if (ffurl_alloc(&mms->mms_hd, httpname, AVIO_FLAG_READ,
00233 &h->interrupt_callback) < 0) {
00234 return AVERROR(EIO);
00235 }
00236
00237 snprintf(headers, sizeof(headers),
00238 "Accept: */*\r\n"
00239 USERAGENT
00240 "Host: %s:%d\r\n"
00241 "Pragma: no-cache,rate=1.000000,stream-time=0,"
00242 "stream-offset=0:0,request-context=%u,max-duration=0\r\n"
00243 CLIENTGUID
00244 "Connection: Close\r\n\r\n",
00245 host, port, mmsh->request_seq++);
00246 av_opt_set(mms->mms_hd->priv_data, "headers", headers, 0);
00247
00248 err = ffurl_connect(mms->mms_hd, NULL);
00249 if (err) {
00250 goto fail;
00251 }
00252 err = get_http_header_data(mmsh);
00253 if (err) {
00254 av_log(NULL, AV_LOG_ERROR, "Get http header data failed!\n");
00255 goto fail;
00256 }
00257
00258
00259 ffurl_close(mms->mms_hd);
00260 memset(headers, 0, sizeof(headers));
00261 if ((err = ffurl_alloc(&mms->mms_hd, httpname, AVIO_FLAG_READ,
00262 &h->interrupt_callback)) < 0) {
00263 goto fail;
00264 }
00265 stream_selection = av_mallocz(mms->stream_num * 19 + 1);
00266 if (!stream_selection)
00267 return AVERROR(ENOMEM);
00268 for (i = 0; i < mms->stream_num; i++) {
00269 char tmp[20];
00270 err = snprintf(tmp, sizeof(tmp), "ffff:%d:0 ", mms->streams[i].id);
00271 if (err < 0)
00272 goto fail;
00273 av_strlcat(stream_selection, tmp, mms->stream_num * 19 + 1);
00274 }
00275
00276 err = snprintf(headers, sizeof(headers),
00277 "Accept: */*\r\n"
00278 USERAGENT
00279 "Host: %s:%d\r\n"
00280 "Pragma: no-cache,rate=1.000000,request-context=%u\r\n"
00281 "Pragma: xPlayStrm=1\r\n"
00282 CLIENTGUID
00283 "Pragma: stream-switch-count=%d\r\n"
00284 "Pragma: stream-switch-entry=%s\r\n"
00285 "Connection: Close\r\n\r\n",
00286 host, port, mmsh->request_seq++, mms->stream_num, stream_selection);
00287 av_freep(&stream_selection);
00288 if (err < 0) {
00289 av_log(NULL, AV_LOG_ERROR, "Build play request failed!\n");
00290 goto fail;
00291 }
00292 av_dlog(NULL, "out_buffer is %s", headers);
00293 av_opt_set(mms->mms_hd->priv_data, "headers", headers, 0);
00294
00295 err = ffurl_connect(mms->mms_hd, NULL);
00296 if (err) {
00297 goto fail;
00298 }
00299
00300 err = get_http_header_data(mmsh);
00301 if (err) {
00302 av_log(NULL, AV_LOG_ERROR, "Get http header data failed!\n");
00303 goto fail;
00304 }
00305
00306 av_dlog(NULL, "Connection successfully open\n");
00307 return 0;
00308 fail:
00309 av_freep(&stream_selection);
00310 mmsh_close(h);
00311 av_dlog(NULL, "Connection failed with error %d\n", err);
00312 return err;
00313 }
00314
00315 static int handle_chunk_type(MMSHContext *mmsh)
00316 {
00317 MMSContext *mms = &mmsh->mms;
00318 int res, len = 0;
00319 ChunkType chunk_type;
00320 chunk_type = get_chunk_header(mmsh, &len);
00321
00322 switch (chunk_type) {
00323 case CHUNK_TYPE_END:
00324 mmsh->chunk_seq = 0;
00325 av_log(NULL, AV_LOG_ERROR, "Stream ended!\n");
00326 return AVERROR(EIO);
00327 case CHUNK_TYPE_STREAM_CHANGE:
00328 mms->header_parsed = 0;
00329 if (res = get_http_header_data(mmsh)) {
00330 av_log(NULL, AV_LOG_ERROR,"Stream changed! Failed to get new header!\n");
00331 return res;
00332 }
00333 break;
00334 case CHUNK_TYPE_DATA:
00335 return read_data_packet(mmsh, len);
00336 default:
00337 av_log(NULL, AV_LOG_ERROR, "Recv other type packet %d\n", chunk_type);
00338 return AVERROR_INVALIDDATA;
00339 }
00340 return 0;
00341 }
00342
00343 static int mmsh_read(URLContext *h, uint8_t *buf, int size)
00344 {
00345 int res = 0;
00346 MMSHContext *mmsh = h->priv_data;
00347 MMSContext *mms = &mmsh->mms;
00348 do {
00349 if (mms->asf_header_read_size < mms->asf_header_size) {
00350
00351 res = ff_mms_read_header(mms, buf, size);
00352 } else {
00353 if (!mms->remaining_in_len && (res = handle_chunk_type(mmsh)))
00354 return res;
00355 res = ff_mms_read_data(mms, buf, size);
00356 }
00357 } while (!res);
00358 return res;
00359 }
00360
00361 URLProtocol ff_mmsh_protocol = {
00362 .name = "mmsh",
00363 .url_open = mmsh_open,
00364 .url_read = mmsh_read,
00365 .url_close = mmsh_close,
00366 .priv_data_size = sizeof(MMSHContext),
00367 .flags = URL_PROTOCOL_FLAG_NETWORK,
00368 };