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Merge remote-tracking branch 'qatar/master'

Browse Source 
* qatar/master:
  id3v2: fix reading unsynchronized frames.
  cdgraphics: fix incorrect vertical offset mask in cdg_scroll()
  apetag: fix error handling in ff_ape_parse_tag()

Conflicts:
	libavformat/id3v2.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-22 15:36:50 +01:00
commit a9cfbf6d4b
3 changed files with 20 additions and 13 deletions
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2
libavcodec/cdgraphics.c
View File

@ -218,7 +218,7 @@ static void cdg_scroll(CDGraphicsContext *cc, uint8_t *data,
vscmd = (data[2] & 0x30) >> 4;
h_off = FFMIN(data[1] & 0x07, CDG_BORDER_WIDTH - 1);
v_off = FFMIN(data[2] & 0x07, CDG_BORDER_HEIGHT - 1);
v_off = FFMIN(data[2] & 0x0F, CDG_BORDER_HEIGHT - 1);
/// find the difference and save the offset for cdg_tile_block usage
hinc = h_off - cc->hscroll;

4
libavformat/apetag.c
View File

@ -142,11 +142,11 @@ int64_t ff_ape_parse_tag(AVFormatContext *s)
return 0;
}
tag_start = file_size - tag_bytes - APE_TAG_FOOTER_BYTES;
if (tag_start < 0) {
if (tag_bytes > file_size - APE_TAG_FOOTER_BYTES) {
av_log(s, AV_LOG_ERROR, "Invalid tag size %u.\n", tag_bytes);
return 0;
}
tag_start = file_size - tag_bytes - APE_TAG_FOOTER_BYTES;
fields = avio_rl32(pb); /* number of fields */
if (fields > 65536) {

27
libavformat/id3v2.c
View File

@ -689,13 +689,15 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t
/* check for text tag or supported special meta tag */
} else if (tag[0] == 'T' || (extra_meta && (extra_func = get_extra_meta_func(tag, isv34)))) {
if (unsync || tunsync || tcomp) {
int i, j;
int64_t end = avio_tell(s->pb) + tlen;
uint8_t *b;
av_fast_malloc(&buffer, &buffer_size, dlen);
if (!buffer) {
av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
goto seek;
}
b = buffer;
#if CONFIG_ZLIB
if (tcomp) {
int n, err;
@ -719,19 +721,24 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t
av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
goto seek;
}
b += dlen;
}
#endif
for (i = 0, j = 0; i < dlen; i++, j++) {
if (!tcomp)
buffer[j] = avio_r8(s->pb);
if (j > 0 && !buffer[j] && buffer[j - 1] == 0xff) {
/* Unsynchronised byte, skip it */
j--;
if (unsync || tunsync) {
if (tcomp) {
av_log_ask_for_sample(s, "tcomp with unsync\n");
goto seek;
}
while (avio_tell(s->pb) < end) {
*b++ = avio_r8(s->pb);
if (*(b - 1) == 0xff && avio_tell(s->pb) < end - 1) {
uint8_t val = avio_r8(s->pb);
*b++ = val ? val : avio_r8(s->pb);
}
}
ffio_init_context(&pb, buffer, j, 0, NULL, NULL, NULL, NULL);
tlen = j;
}
ffio_init_context(&pb, buffer, b - buffer, 0, NULL, NULL, NULL, NULL);
tlen = b - buffer;
pbx = &pb; // read from sync buffer
} else {
pbx = s->pb; // read straight from input