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vc1: fix up memleaks in the error codepath.

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Introduce end: and err: labels at the end of vc1_decode_frame(), which
will clean up allocated memory consistently.
This commit is contained in:
Ronald S. Bultje 2011-03-01 11:37:55 -05:00
parent 72452cc475
commit b81a935bd9
1 changed files with 19 additions and 22 deletions
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41
libavcodec/vc1dec.c
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@ -3217,15 +3217,14 @@ static int vc1_decode_frame(AVCodecContext *avctx,
divider = find_next_marker(buf, buf + buf_size);
if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){
av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
av_free(buf2);
return -1;
goto err;
}
buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
// TODO
if(!v->warn_interlaced++)
av_log(v->s.avctx, AV_LOG_ERROR, "Interlaced WVC1 support is not implemented\n");
av_free(buf2);return -1;
goto err;
}else{
buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
}
@ -3235,19 +3234,16 @@ static int vc1_decode_frame(AVCodecContext *avctx,
// do parse frame header
if(v->profile < PROFILE_ADVANCED) {
if(vc1_parse_frame_header(v, &s->gb) == -1) {
av_free(buf2);
return -1;
goto err;
}
} else {
if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {
av_free(buf2);
return -1;
goto err;
}
}
if(v->res_sprite && (s->pict_type!=FF_I_TYPE)){
av_free(buf2);
return -1;
goto err;
}
// for hurry_up==5
@ -3256,33 +3252,29 @@ static int vc1_decode_frame(AVCodecContext *avctx,
/* skip B-frames if we don't have reference frames */
if(s->last_picture_ptr==NULL && (s->pict_type==FF_B_TYPE || s->dropable)){
av_free(buf2);
return -1;//buf_size;
goto err;
}
/* skip b frames if we are in a hurry */
if(avctx->hurry_up && s->pict_type==FF_B_TYPE) return -1;//buf_size;
if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)
|| (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)
|| avctx->skip_frame >= AVDISCARD_ALL) {
av_free(buf2);
return buf_size;
goto end;
}
/* skip everything if we are in a hurry>=5 */
if(avctx->hurry_up>=5) {
av_free(buf2);
return -1;//buf_size;
goto err;
}
if(s->next_p_frame_damaged){
if(s->pict_type==FF_B_TYPE)
return buf_size;
goto end;
else
s->next_p_frame_damaged=0;
}
if(MPV_frame_start(s, avctx) < 0) {
av_free(buf2);
return -1;
goto err;
}
s->me.qpel_put= s->dsp.put_qpel_pixels_tab;
@ -3293,17 +3285,17 @@ static int vc1_decode_frame(AVCodecContext *avctx,
ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);
else if (avctx->hwaccel) {
if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0)
return -1;
goto err;
if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)
return -1;
goto err;
if (avctx->hwaccel->end_frame(avctx) < 0)
return -1;
goto err;
} else {
ff_er_frame_start(s);
v->bits = buf_size * 8;
vc1_decode_blocks(v);
//av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);
//av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), s->gb.size_in_bits);
// if(get_bits_count(&s->gb) > buf_size * 8)
// return -1;
ff_er_frame_end(s);
@ -3324,8 +3316,13 @@ assert(s->current_picture.pict_type == s->pict_type);
ff_print_debug_info(s, pict);
}
end:
av_free(buf2);
return buf_size;
err:
av_free(buf2);
return -1;
}