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@ -29,6 +29,7 @@ |
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*/ |
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#include "avformat.h" |
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#include "mms.h" |
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#include "internal.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavcodec/bytestream.h" |
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@ -83,40 +84,6 @@ typedef enum { |
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/*@}*/ |
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} MMSSCPacketType; |
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typedef struct { |
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int id; |
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}MMSStream; |
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typedef struct { |
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URLContext *mms_hd; ///< TCP connection handle
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MMSStream streams[MAX_STREAMS]; |
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/** Buffer for outgoing packets. */ |
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/*@{*/ |
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uint8_t *write_out_ptr; ///< Pointer for writting the buffer.
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uint8_t out_buffer[512]; ///< Buffer for outgoing packet.
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/*@}*/ |
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/** Buffer for incoming packets. */ |
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/*@{*/ |
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uint8_t in_buffer[8192]; ///< Buffer for incoming packets.
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uint8_t *read_in_ptr; ///< Pointer for reading from incoming buffer.
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int remaining_in_len; ///< Reading length from incoming buffer.
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/*@}*/ |
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/** Internal handling of the ASF header */ |
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/*@{*/ |
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uint8_t *asf_header; ///< Stored ASF header.
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int asf_header_size; ///< Size of stored ASF header.
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int header_parsed; ///< The header has been received and parsed.
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int asf_packet_len; |
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int asf_header_read_size; |
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/*@}*/ |
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int stream_num; ///< stream numbers.
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} MMSContext; |
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typedef struct { |
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MMSContext mms; |
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int outgoing_packet_seq; ///< Outgoing packet sequence number.
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@ -466,67 +433,6 @@ static int send_startup_packet(MMSTContext *mmst) |
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return send_command_packet(mmst); |
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} |
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static int asf_header_parser(MMSContext *mms) |
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{ |
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uint8_t *p = mms->asf_header; |
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uint8_t *end; |
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int flags, stream_id; |
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mms->stream_num = 0; |
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if (mms->asf_header_size < sizeof(ff_asf_guid) * 2 + 22 || |
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memcmp(p, ff_asf_header, sizeof(ff_asf_guid))) { |
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av_log(NULL, AV_LOG_ERROR, |
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"Corrupt stream (invalid ASF header, size=%d)\n", |
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mms->asf_header_size); |
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return AVERROR_INVALIDDATA; |
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} |
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end = mms->asf_header + mms->asf_header_size; |
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p += sizeof(ff_asf_guid) + 14; |
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while(end - p >= sizeof(ff_asf_guid) + 8) { |
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uint64_t chunksize = AV_RL64(p + sizeof(ff_asf_guid)); |
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if (!chunksize || chunksize > end - p) { |
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av_log(NULL, AV_LOG_ERROR, |
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"Corrupt stream (header chunksize %"PRId64" is invalid)\n", |
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chunksize); |
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return AVERROR_INVALIDDATA; |
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} |
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if (!memcmp(p, ff_asf_file_header, sizeof(ff_asf_guid))) { |
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/* read packet size */ |
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if (end - p > sizeof(ff_asf_guid) * 2 + 68) { |
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mms->asf_packet_len = AV_RL32(p + sizeof(ff_asf_guid) * 2 + 64); |
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if (mms->asf_packet_len <= 0 || mms->asf_packet_len > sizeof(mms->in_buffer)) { |
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av_log(NULL, AV_LOG_ERROR, |
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"Corrupt stream (too large pkt_len %d)\n", |
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mms->asf_packet_len); |
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return AVERROR_INVALIDDATA; |
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} |
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} |
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} else if (!memcmp(p, ff_asf_stream_header, sizeof(ff_asf_guid))) { |
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flags = AV_RL16(p + sizeof(ff_asf_guid)*3 + 24); |
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stream_id = flags & 0x7F; |
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//The second condition is for checking CS_PKT_STREAM_ID_REQUEST packet size,
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//we can calcuate the packet size by stream_num.
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//Please see function send_stream_selection_request().
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if (mms->stream_num < MAX_STREAMS && |
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46 + mms->stream_num * 6 < sizeof(mms->out_buffer)) { |
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mms->streams[mms->stream_num].id = stream_id; |
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mms->stream_num++; |
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} else { |
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av_log(NULL, AV_LOG_ERROR, |
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"Corrupt stream (too many A/V streams)\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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} else if (!memcmp(p, ff_asf_head1_guid, sizeof(ff_asf_guid))) { |
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chunksize = 46; // see references [2] section 3.4. This should be set 46.
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} |
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p += chunksize; |
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} |
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return 0; |
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} |
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/** Send MMST stream selection command based on the AVStream->discard values. */ |
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static int send_stream_selection_request(MMSTContext *mmst) |
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{ |
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@ -543,16 +449,6 @@ static int send_stream_selection_request(MMSTContext *mmst) |
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return send_command_packet(mmst); |
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} |
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static int read_data(MMSContext *mms, uint8_t *buf, const int buf_size) |
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{ |
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int read_size; |
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read_size = FFMIN(buf_size, mms->remaining_in_len); |
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memcpy(buf, mms->read_in_ptr, read_size); |
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mms->remaining_in_len -= read_size; |
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mms->read_in_ptr += read_size; |
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return read_size; |
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} |
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static int send_close_packet(MMSTContext *mmst) |
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{ |
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start_command_packet(mmst, CS_PKT_STREAM_CLOSE); |
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@ -652,7 +548,7 @@ static int mms_open(URLContext *h, const char *uri, int flags) |
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goto fail; |
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if((mmst->incoming_flags != 0X08) && (mmst->incoming_flags != 0X0C)) |
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goto fail; |
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err = asf_header_parser(mms); |
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err = ff_mms_asf_header_parser(mms); |
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if (err) { |
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dprintf(NULL, "asf header parsed failed!\n"); |
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goto fail; |
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@ -686,25 +582,15 @@ static int mms_read(URLContext *h, uint8_t *buf, int size) |
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MMSTContext *mmst = h->priv_data; |
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MMSContext *mms = &mmst->mms; |
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int result = 0; |
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int size_to_copy; |
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do { |
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if(mms->asf_header_read_size < mms->asf_header_size) { |
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/* Read from ASF header buffer */ |
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size_to_copy= FFMIN(size, |
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mms->asf_header_size - mms->asf_header_read_size); |
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memcpy(buf, mms->asf_header + mms->asf_header_read_size, size_to_copy); |
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mms->asf_header_read_size += size_to_copy; |
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result += size_to_copy; |
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dprintf(NULL, "Copied %d bytes from stored header. left: %d\n", |
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size_to_copy, mms->asf_header_size - mms->asf_header_read_size); |
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if (mms->asf_header_size == mms->asf_header_read_size) { |
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av_freep(&mms->asf_header); |
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} |
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result = ff_mms_read_header(mms, buf, size); |
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} else if(mms->remaining_in_len) { |
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/* Read remaining packet data to buffer.
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* the result can not be zero because remaining_in_len is positive.*/ |
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result = read_data(mms, buf, size); |
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result = ff_mms_read_data(mms, buf, size); |
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} else { |
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/* Read from network */ |
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int err = mms_safe_send_recv(mmst, NULL, SC_PKT_ASF_MEDIA); |
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@ -716,7 +602,7 @@ static int mms_read(URLContext *h, uint8_t *buf, int size) |
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result= AVERROR_IO; |
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} else { |
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// copy the data to the packet buffer.
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result = read_data(mms, buf, size); |
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result = ff_mms_read_data(mms, buf, size); |
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if (result == 0) { |
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dprintf(NULL, "read asf media paket size is zero!\n"); |
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break; |
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