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Merge remote-tracking branch 'qatar/master'

Browse Source 
* qatar/master:
  mp3dec: perform I/S and M/S only when frame mode is joint stereo.
  id3v2: add another mimetype for JPEG image
  lzw: prevent buffer overreads.
  WMAL: Remove inaccurate and unnecessary doxy
  h264: fix cabac-on-stack after safe cabac reader.
  truemotion2: convert packet header reading to bytestream2.

Conflicts:
	libavcodec/lzw.c
	libavcodec/truemotion2.c
	libavformat/id3v2.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-03-30 06:03:30 +02:00
commit 2b7c0c9fe1
5 changed files with 41 additions and 36 deletions
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11
libavcodec/lzw.c
View File

@ -101,9 +101,14 @@ void ff_lzw_decode_tail(LZWState *p)
struct LZWState *s = (struct LZWState *)p;
if(s->mode == FF_LZW_GIF) {
while(s->pbuf + s->bs < s->ebuf && s->bs>0){
s->pbuf += s->bs;
s->bs = *s->pbuf++;
while (s->bs > 0) {
if (s->pbuf + s->bs >= s->ebuf) {
s->pbuf = s->ebuf;
break;
} else {
s->pbuf += s->bs;
s->bs = *s->pbuf++;
}
}
}else
s->pbuf= s->ebuf;

2
libavcodec/mpegaudiodec.c
View File

@ -1532,7 +1532,7 @@ static int mp_decode_layer3(MPADecodeContext *s)
huffman_decode(s, g, exponents, bits_pos + g->part2_3_length);
} /* ch */
if (s->nb_channels == 2)
if (s->mode == MPA_JSTEREO)
compute_stereo(s, &s->granules[0][gr], &s->granules[1][gr]);
for (ch = 0; ch < s->nb_channels; ch++) {

54
libavcodec/truemotion2.c
View File

@ -25,6 +25,7 @@
*/
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "dsputil.h"
@ -251,18 +252,19 @@ static int tm2_read_deltas(TM2Context *ctx, int stream_id) {
static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
{
int i;
int cur = 0;
int skip = 0;
int len, toks;
int len, toks, pos;
TM2Codes codes;
GetByteContext gb;
if (buf_size < 4) {
av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n");
return -1;
return AVERROR_INVALIDDATA;
}
/* get stream length in dwords */
len = AV_RB32(buf); buf += 4; cur += 4;
bytestream2_init(&gb, buf, buf_size);
len = bytestream2_get_be32(&gb);
skip = len * 4 + 4;
if(len == 0)
@ -273,36 +275,37 @@ static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, i
return -1;
}
toks = AV_RB32(buf); buf += 4; cur += 4;
toks = bytestream2_get_be32(&gb);
if(toks & 1) {
len = AV_RB32(buf); buf += 4; cur += 4;
len = bytestream2_get_be32(&gb);
if(len == TM2_ESCAPE) {
len = AV_RB32(buf); buf += 4; cur += 4;
len = bytestream2_get_be32(&gb);
}
if(len > 0) {
if (skip <= cur)
pos = bytestream2_tell(&gb);
if (skip <= pos)
return -1;
init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
if(tm2_read_deltas(ctx, stream_id) == -1)
return -1;
buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
}
}
/* skip unused fields */
if(AV_RB32(buf) == TM2_ESCAPE) {
buf += 4; cur += 4; /* some unknown length - could be escaped too */
len = bytestream2_get_be32(&gb);
if(len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
bytestream2_skip(&gb, 8); /* unused by decoder */
} else {
bytestream2_skip(&gb, 4); /* unused by decoder */
}
buf += 4; cur += 4;
buf += 4; cur += 4; /* unused by decoder */
if (skip <= cur)
pos = bytestream2_tell(&gb);
if (skip <= pos)
return -1;
init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
if(tm2_build_huff_table(ctx, &codes) == -1)
return -1;
buf += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
cur += ((get_bits_count(&ctx->gb) + 31) >> 5) << 2;
bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
toks >>= 1;
/* check if we have sane number of tokens */
@ -313,11 +316,12 @@ static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, i
}
ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
ctx->tok_lens[stream_id] = toks;
len = AV_RB32(buf); buf += 4; cur += 4;
len = bytestream2_get_be32(&gb);
if(len > 0) {
if (skip <= cur)
pos = bytestream2_tell(&gb);
if (skip <= pos)
return -1;
init_get_bits(&ctx->gb, buf, (skip - cur) * 8);
init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
for(i = 0; i < toks; i++) {
if (get_bits_left(&ctx->gb) <= 0) {
av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
@ -780,7 +784,7 @@ static int decode_frame(AVCodecContext *avctx,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
int buf_size = avpkt->size & ~3;
TM2Context * const l = avctx->priv_data;
AVFrame * const p = &l->pic;
int i, skip, t;
@ -805,6 +809,10 @@ static int decode_frame(AVCodecContext *avctx,
}
for(i = 0; i < TM2_NUM_STREAMS; i++){
if (skip >= buf_size) {
av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n");
return AVERROR_INVALIDDATA;
}
t = tm2_read_stream(l, l->buffer + skip, tm2_stream_order[i], buf_size - skip);
if(t == -1){
return -1;

8
libavcodec/wmalosslessdec.c
View File

@ -1153,14 +1153,6 @@ static void save_bits(WmallDecodeCtx *s, GetBitContext* gb, int len,
skip_bits(&s->gb, s->frame_offset);
}
/**
* @brief Decode a single WMA packet.
* @param avctx codec context
* @param data the output buffer
* @param data_size number of bytes that were written to the output buffer
* @param avpkt input packet
* @return number of bytes that were read from the input buffer
*/
static int decode_packet(AVCodecContext *avctx, void *data, int *got_frame_ptr,
AVPacket* avpkt)
{

2
libavformat/id3v2.c
View File

@ -127,7 +127,7 @@ const char *ff_id3v2_picture_types[21] = {
const CodecMime ff_id3v2_mime_tags[] = {
{"image/gif" , CODEC_ID_GIF},
{"image/jpeg", CODEC_ID_MJPEG},
{"image/jpg" , CODEC_ID_MJPEG},
{"image/jpg", CODEC_ID_MJPEG},
{"image/png" , CODEC_ID_PNG},
{"image/tiff", CODEC_ID_TIFF},
{"", CODEC_ID_NONE},