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vc1dec: propagate error codes and return meaningful error codes

tags/n2.8
wm4 10 years ago
parent
40ddbc87c5
commit
8024002d40
1 changed files with 47 additions and 25 deletions
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  1. +47
    -25
      libavcodec/vc1dec.c

+ 47
- 25
libavcodec/vc1dec.c View File

@@ -283,7 +283,7 @@ static int vc1_decode_sprites(VC1Context *v, GetBitContext* gb)

if (!s->current_picture.f || !s->current_picture.f->data[0]) {
av_log(avctx, AV_LOG_ERROR, "Got no sprites\n");
return -1;
return AVERROR_UNKNOWN;
}

if (v->two_sprites && (!s->last_picture_ptr || !s->last_picture.f->data[0])) {
@@ -683,12 +683,16 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU)
buf_start_second_field = start;
tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
if (!tmp)
if (!tmp) {
ret = AVERROR(ENOMEM);
goto err;
}
slices = tmp;
slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!slices[n_slices].buf)
if (!slices[n_slices].buf) {
ret = AVERROR(ENOMEM);
goto err;
}
buf_size3 = vc1_unescape_buffer(start + 4, size,
slices[n_slices].buf);
init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
@@ -708,12 +712,16 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
case VC1_CODE_SLICE: {
int buf_size3;
tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
if (!tmp)
if (!tmp) {
ret = AVERROR(ENOMEM);
goto err;
}
slices = tmp;
slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!slices[n_slices].buf)
if (!slices[n_slices].buf) {
ret = AVERROR(ENOMEM);
goto err;
}
buf_size3 = vc1_unescape_buffer(start + 4, size,
slices[n_slices].buf);
init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
@@ -731,18 +739,23 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
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");
ret = AVERROR_INVALIDDATA;
goto err;
} else { // found field marker, unescape second field
if (avctx->hwaccel ||
s->avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU)
buf_start_second_field = divider;
tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
if (!tmp)
if (!tmp) {
ret = AVERROR(ENOMEM);
goto err;
}
slices = tmp;
slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!slices[n_slices].buf)
if (!slices[n_slices].buf) {
ret = AVERROR(ENOMEM);
goto err;
}
buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf);
init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
buf_size3 << 3);
@@ -783,9 +796,9 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
}

if (!s->context_initialized) {
if (ff_msmpeg4_decode_init(avctx) < 0)
if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
goto err;
if (ff_vc1_decode_init_alloc_tables(v) < 0) {
if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0) {
ff_mpv_common_end(s);
goto err;
}
@@ -793,8 +806,10 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
s->low_delay = !avctx->has_b_frames || v->res_sprite;

if (v->profile == PROFILE_ADVANCED) {
if(avctx->coded_width<=1 || avctx->coded_height<=1)
if(avctx->coded_width<=1 || avctx->coded_height<=1) {
ret = AVERROR_INVALIDDATA;
goto err;
}
s->h_edge_pos = avctx->coded_width;
s->v_edge_pos = avctx->coded_height;
}
@@ -804,11 +819,11 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
v->pic_header_flag = 0;
v->first_pic_header_flag = 1;
if (v->profile < PROFILE_ADVANCED) {
if (ff_vc1_parse_frame_header(v, &s->gb) < 0) {
if ((ret = ff_vc1_parse_frame_header(v, &s->gb)) < 0) {
goto err;
}
} else {
if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
if ((ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
goto err;
}
}
@@ -820,11 +835,13 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)
&& s->pict_type != AV_PICTURE_TYPE_I) {
av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");
ret = AVERROR_INVALIDDATA;
goto err;
}

if ((s->mb_height >> v->field_mode) == 0) {
av_log(v->s.avctx, AV_LOG_ERROR, "image too short\n");
ret = AVERROR_INVALIDDATA;
goto err;
}

@@ -850,7 +867,7 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
s->next_p_frame_damaged = 0;
}

if (ff_mpv_frame_start(s, avctx) < 0) {
if ((ret = ff_mpv_frame_start(s, avctx)) < 0) {
goto err;
}

@@ -885,11 +902,11 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
if (v->field_mode && buf_start_second_field) {
// decode first field
s->picture_structure = PICT_BOTTOM_FIELD - v->tff;
if (avctx->hwaccel->start_frame(avctx, buf_start, buf_start_second_field - buf_start) < 0)
if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
goto err;
if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_start_second_field - buf_start) < 0)
if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
goto err;
if (avctx->hwaccel->end_frame(avctx) < 0)
if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
goto err;

// decode second field
@@ -899,23 +916,24 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
v->pic_header_flag = 0;
if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
av_log(avctx, AV_LOG_ERROR, "parsing header for second field failed");
ret = AVERROR_INVALIDDATA;
goto err;
}
v->s.current_picture_ptr->f->pict_type = v->s.pict_type;

if (avctx->hwaccel->start_frame(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field) < 0)
if ((ret = avctx->hwaccel->start_frame(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
goto err;
if (avctx->hwaccel->decode_slice(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field) < 0)
if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
goto err;
if (avctx->hwaccel->end_frame(avctx) < 0)
if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
goto err;
} else {
s->picture_structure = PICT_FRAME;
if (avctx->hwaccel->start_frame(avctx, buf_start, (buf + buf_size) - buf_start) < 0)
if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
goto err;
if (avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start) < 0)
if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
goto err;
if (avctx->hwaccel->end_frame(avctx) < 0)
if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
goto err;
}
} else {
@@ -958,6 +976,7 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
if (v->field_mode && i == n_slices1 + 2) {
if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");
ret = AVERROR_INVALIDDATA;
if (avctx->err_recognition & AV_EF_EXPLODE)
goto err;
continue;
@@ -966,6 +985,7 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
v->pic_header_flag = 1;
if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
ret = AVERROR_INVALIDDATA;
if (avctx->err_recognition & AV_EF_EXPLODE)
goto err;
continue;
@@ -1012,8 +1032,10 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
get_bits_count(&s->gb), s->gb.size_in_bits);
// if (get_bits_count(&s->gb) > buf_size * 8)
// return -1;
if(s->er.error_occurred && s->pict_type == AV_PICTURE_TYPE_B)
if(s->er.error_occurred && s->pict_type == AV_PICTURE_TYPE_B) {
ret = AVERROR_INVALIDDATA;
goto err;
}
if (!v->field_mode)
ff_er_frame_end(&s->er);
}
@@ -1027,7 +1049,7 @@ image:
if (avctx->skip_frame >= AVDISCARD_NONREF)
goto end;
#if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
if (vc1_decode_sprites(v, &s->gb))
if ((ret = vc1_decode_sprites(v, &s->gb)) < 0)
goto err;
#endif
if ((ret = av_frame_ref(pict, v->sprite_output_frame)) < 0)
@@ -1059,7 +1081,7 @@ err:
for (i = 0; i < n_slices; i++)
av_free(slices[i].buf);
av_free(slices);
return -1;
return ret;
}




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