fix broken memset(padding, 0) code

add a few asserts

Originally committed as revision 7903 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/asf-enc.c

@@ -537,6 +537,11 @@ static int put_payload_parsing_info(
 
     int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
 
+    padsize -= PACKET_HEADER_MIN_SIZE;
+    if(asf->multi_payloads_present)
+        padsize--;
+    assert(padsize>=0);
+
     put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
     for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
         put_byte(pb, 0x0);
@@ -587,7 +592,8 @@ static void flush_packet(AVFormatContext *s)
                             asf->packet_size_left
                         );
 
-    packet_filled_size = PACKET_SIZE - packet_hdr_size - asf->packet_size_left;
+    packet_filled_size = PACKET_SIZE - asf->packet_size_left;
+    assert(packet_hdr_size <= asf->packet_size_left);
     memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
 
     put_buffer(&s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size);
@@ -656,20 +662,18 @@ static void put_frame(
         if (asf->packet_timestamp_start == -1) {
             asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
 
+            asf->packet_size_left = PACKET_SIZE;
             if (asf->multi_payloads_present){
-                asf->packet_size_left = PACKET_SIZE; //For debug
-                asf->packet_size_left = PACKET_SIZE - PACKET_HEADER_MIN_SIZE - 1;
                 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
             }
             else {
-                asf->packet_size_left = PACKET_SIZE - PACKET_HEADER_MIN_SIZE;
                 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
             }
             asf->packet_timestamp_start = timestamp;
         }
         else {
             // multi payloads
-            frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS;
+            frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1;
 
             asf->packet_timestamp_start = timestamp;
         }
@@ -697,7 +701,7 @@ static void put_frame(
 
         if (!asf->multi_payloads_present)
             flush_packet(s);
-        else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + 1))
+        else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
             flush_packet(s);
     }
     stream->seq++;

tests/ffmpeg.regression.ref

@@ -188,17 +188,17 @@ c3382f03ce2efb5d475240d288a33898 *./data/a-flac.flac
 353368 ./data/a-flac.flac
 c4228df189aad9567a037727d0e763e4 *./data/out.wav
 stddev: 33.31 PSNR:65.87 bytes:1040384
-9fe59eb60481009f6f7d13d1b031975d *./data/a-wmav1.asf
+768305cec342e01b7a9d38e971ef0174 *./data/a-wmav1.asf
 99596 ./data/a-wmav1.asf
 2ab193df22bb473e61015e56ac11faf3 *./data/out.wav
 stddev:12251.50 PSNR:14.56 bytes:1056768
 stddev:2106.00 PSNR:29.85 bytes:1048576
-ff09659af56c931350db4dec737eea7f *./data/a-wmav2.asf
+c706c7cf9db10df7a7353a40feddcfdd *./data/a-wmav2.asf
 99602 ./data/a-wmav2.asf
 8d05d345bc14153f3d0da95fdf34e084 *./data/out.wav
 stddev:12255.92 PSNR:14.55 bytes:1056768
 stddev:2099.31 PSNR:29.88 bytes:1048576
-e56c2c60b025594eac3ba670ae3cc50d *./data/a-vorbis.asf
+ef725cb9c13b9437a41428eabadeba52 *./data/a-vorbis.asf
 35686 ./data/a-vorbis.asf
-295d828df6167db030d0812ce1a8fd93 *./data/out.wav
+e46368ef818f2ec3abcc3f8390d14df5 *./data/out.wav
 stddev:3882.46 PSNR:24.54 bytes:1056768

tests/libav.regression.ref

@@ -2,7 +2,7 @@ ffmpeg regression test
 8a0536ccfe36f4fff408b3327d33e1dd *./data/b-libav.avi
 340344 ./data/b-libav.avi
 ./data/b-libav.avi CRC=0x400c29e9
-af76964183b72ab3e18f1581e55950db *./data/b-libav.asf
+149792fc0d4e5ccb395c47716e2975d9 *./data/b-libav.asf
 339767 ./data/b-libav.asf
 ./data/b-libav.asf CRC=0x74113749
 1ad618e9fd318eb3483270cf9b9b3f43 *./data/b-libav.rm

tests/rotozoom.regression.ref

@@ -188,17 +188,17 @@ c3382f03ce2efb5d475240d288a33898 *./data/a-flac.flac
 353368 ./data/a-flac.flac
 c4228df189aad9567a037727d0e763e4 *./data/out.wav
 stddev: 33.31 PSNR:65.87 bytes:1040384
-9fe59eb60481009f6f7d13d1b031975d *./data/a-wmav1.asf
+768305cec342e01b7a9d38e971ef0174 *./data/a-wmav1.asf
 99596 ./data/a-wmav1.asf
 2ab193df22bb473e61015e56ac11faf3 *./data/out.wav
 stddev:12251.50 PSNR:14.56 bytes:1056768
 stddev:2106.00 PSNR:29.85 bytes:1048576
-ff09659af56c931350db4dec737eea7f *./data/a-wmav2.asf
+c706c7cf9db10df7a7353a40feddcfdd *./data/a-wmav2.asf
 99602 ./data/a-wmav2.asf
 8d05d345bc14153f3d0da95fdf34e084 *./data/out.wav
 stddev:12255.92 PSNR:14.55 bytes:1056768
 stddev:2099.31 PSNR:29.88 bytes:1048576
-e56c2c60b025594eac3ba670ae3cc50d *./data/a-vorbis.asf
+ef725cb9c13b9437a41428eabadeba52 *./data/a-vorbis.asf
 35686 ./data/a-vorbis.asf
-295d828df6167db030d0812ce1a8fd93 *./data/out.wav
+e46368ef818f2ec3abcc3f8390d14df5 *./data/out.wav
 stddev:3882.46 PSNR:24.54 bytes:1056768