From 74d6871d6244865b5863a01c3dab16a2f06a1706 Mon Sep 17 00:00:00 2001 From: Marton Balint Date: Sat, 19 Feb 2011 17:33:15 +0100 Subject: [PATCH] MMS: also discover streams in extended stream properties object Allows playback of nonprimary audio streams in multiple bitrate sources, such as mmsh://wmscr1.dr.dk/e02ch03m Signed-off-by: Ronald S. Bultje --- libavformat/mms.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/libavformat/mms.c b/libavformat/mms.c index d995a43a0e..b541208e31 100644 --- a/libavformat/mms.c +++ b/libavformat/mms.c @@ -115,6 +115,34 @@ int ff_mms_asf_header_parser(MMSContext *mms) "Corrupt stream (too many A/V streams)\n"); return AVERROR_INVALIDDATA; } + } else if (!memcmp(p, ff_asf_ext_stream_header, sizeof(ff_asf_guid))) { + if (end - p >= 88) { + int stream_count = AV_RL16(p + 84), ext_len_count = AV_RL16(p + 86); + uint64_t skip_bytes = 88; + while (stream_count--) { + if (end - p < skip_bytes + 4) { + av_log(NULL, AV_LOG_ERROR, + "Corrupt stream (next stream name length is not in the buffer)\n"); + return AVERROR_INVALIDDATA; + } + skip_bytes += 4 + AV_RL16(p + skip_bytes + 2); + } + while (ext_len_count--) { + if (end - p < skip_bytes + 22) { + av_log(NULL, AV_LOG_ERROR, + "Corrupt stream (next extension system info length is not in the buffer)\n"); + return AVERROR_INVALIDDATA; + } + skip_bytes += 22 + AV_RL32(p + skip_bytes + 18); + } + if (end - p < skip_bytes) { + av_log(NULL, AV_LOG_ERROR, + "Corrupt stream (the last extension system info length is invalid)\n"); + return AVERROR_INVALIDDATA; + } + if (chunksize - skip_bytes > 24) + chunksize = skip_bytes; + } } 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. }