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png_parser: Fix parsing on big endian 

Since pc.state is populated by shifting in from the end of the
32 bit word, the content within pc.state is already in native endian
and should not be read with the AV_R{L,B} functions.

This was already done correctly for state64 above.

This fixes the fate-corepng test on big endian.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-12-18 10:39:47 +02:00
parent d8fd183683
commit b3189aff8b
1 changed files with 2 additions and 2 deletions
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4
libavcodec/png_parser.c
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@ -78,7 +78,7 @@ static int png_parse(AVCodecParserContext *s, AVCodecContext *avctx,
for (; ppc->pc.frame_start_found && i < buf_size; i++) {
ppc->pc.state = (ppc->pc.state << 8) | buf[i];
if (ppc->chunk_pos == 3) {
ppc->chunk_length = AV_RL32(&ppc->pc.state);
ppc->chunk_length = ppc->pc.state;
if (ppc->chunk_length > 0x7fffffff) {
ppc->chunk_pos = ppc->pc.frame_start_found = 0;
goto flush;
@ -87,7 +87,7 @@ static int png_parse(AVCodecParserContext *s, AVCodecContext *avctx,
} else if (ppc->chunk_pos == 7) {
if (ppc->chunk_length >= buf_size - i)
ppc->remaining_size = ppc->chunk_length - buf_size + i + 1;
if (AV_RB32(&ppc->pc.state) == MKTAG('I', 'E', 'N', 'D')) {
if (ppc->pc.state == MKBETAG('I', 'E', 'N', 'D')) {
if (ppc->remaining_size)
ppc->chunk_pos = -1;
else