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asfdec: cosmetics, reformat ff_asf_parse_packet()

tags/n1.1
Anton Khirnov 13 years ago
parent
5a9567631a
commit
292a08cbab
1 changed files with 72 additions and 66 deletions
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  1. +72
    -66
      libavformat/asfdec.c

+ 72
- 66
libavformat/asfdec.c View File

@@ -1002,13 +1002,15 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
ASFStream *asf_st = 0;
for (;;) {
int ret;
if(pb->eof_reached)

if (pb->eof_reached)
return AVERROR_EOF;
if (asf->packet_size_left < FRAME_HEADER_SIZE
|| asf->packet_segments < 1) {
//asf->packet_size_left <= asf->packet_padsize) {
if (asf->packet_size_left < FRAME_HEADER_SIZE ||
asf->packet_segments < 1) {
int ret = asf->packet_size_left + asf->packet_padsize;
assert(ret>=0);

assert(ret >= 0);
/* fail safe */
avio_skip(pb, ret);

@@ -1019,19 +1021,19 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
return 1;
}
if (asf->packet_time_start == 0) {
if(asf_read_frame_header(s, pb) < 0){
asf->packet_segments= 0;
if (asf_read_frame_header(s, pb) < 0) {
asf->packet_segments = 0;
continue;
}
if (asf->stream_index < 0
|| s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
|| (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
) {
if (asf->stream_index < 0 ||
s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
(!asf->packet_key_frame &&
s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) {
asf->packet_time_start = 0;
/* unhandled packet (should not happen) */
avio_skip(pb, asf->packet_frag_size);
asf->packet_size_left -= asf->packet_frag_size;
if(asf->stream_index < 0)
if (asf->stream_index < 0)
av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
continue;
}
@@ -1042,12 +1044,11 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
if (asf->packet_replic_size == 1) {
// frag_offset is here used as the beginning timestamp
asf->packet_frag_timestamp = asf->packet_time_start;
asf->packet_time_start += asf->packet_time_delta;
asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
asf->packet_time_start += asf->packet_time_delta;
asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
asf->packet_size_left--;
asf->packet_multi_size--;
if (asf->packet_multi_size < asf->packet_obj_size)
{
if (asf->packet_multi_size < asf->packet_obj_size) {
asf->packet_time_start = 0;
avio_skip(pb, asf->packet_multi_size);
asf->packet_size_left -= asf->packet_multi_size;
@@ -1055,29 +1056,30 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
}
asf->packet_multi_size -= asf->packet_obj_size;
}
if( /*asf->packet_frag_size == asf->packet_obj_size*/
asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
&& asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size &&
asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size) {
av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
asf_st->frag_offset, asf->packet_frag_size,
asf->packet_obj_size, asf_st->pkt.size);
asf->packet_obj_size= asf_st->pkt.size;
asf_st->frag_offset, asf->packet_frag_size,
asf->packet_obj_size, asf_st->pkt.size);
asf->packet_obj_size = asf_st->pkt.size;
}

if ( asf_st->pkt.size != asf->packet_obj_size
|| asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
if(asf_st->pkt.data){
av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
if (asf_st->pkt.size != asf->packet_obj_size ||
//FIXME is this condition sufficient?
asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
if (asf_st->pkt.data) {
av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, "
"new %d\n", asf_st->pkt.size, asf->packet_obj_size);
asf_st->frag_offset = 0;
av_free_packet(&asf_st->pkt);
}
/* new packet */
av_new_packet(&asf_st->pkt, asf->packet_obj_size);
asf_st->seq = asf->packet_seq;
asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
asf_st->seq = asf->packet_seq;
asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
asf_st->pkt.stream_index = asf->stream_index;
asf_st->pkt.pos =
asf_st->packet_pos= asf->packet_pos;
asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
if (asf_st->pkt.data && asf_st->palette_changed) {
uint8_t *pal;
pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
@@ -1108,18 +1110,19 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
if (asf->packet_size_left < 0)
continue;

if( asf->packet_frag_offset >= asf_st->pkt.size
|| asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
if (asf->packet_frag_offset >= asf_st->pkt.size ||
asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
continue;
}

ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
asf->packet_frag_size);
asf->packet_frag_size);
if (ret != asf->packet_frag_size) {
if (ret < 0 || asf->packet_frag_offset + ret == 0)
return ret < 0 ? ret : AVERROR_EOF;

if (asf_st->ds_span > 1) {
// scrambling, we can either drop it completely or fill the remainder
// TODO: should we fill the whole packet instead of just the current
@@ -1127,9 +1130,10 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
asf->packet_frag_size - ret);
ret = asf->packet_frag_size;
} else
} else {
// no scrambling, so we can return partial packets
av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
}
}
if (s->key && s->keylen == 20)
ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
@@ -1138,11 +1142,11 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
/* test if whole packet is read */
if (asf_st->frag_offset == asf_st->pkt.size) {
//workaround for macroshit radio DVR-MS files
if( s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO
&& asf_st->pkt.size > 100){
if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
asf_st->pkt.size > 100) {
int i;
for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
if(i == asf_st->pkt.size){
for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
if (i == asf_st->pkt.size) {
av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
asf_st->frag_offset = 0;
av_free_packet(&asf_st->pkt);
@@ -1152,37 +1156,39 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk

/* return packet */
if (asf_st->ds_span > 1) {
if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
}else{
/* packet descrambling */
uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
if (newdata) {
int offset = 0;
memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
while (offset < asf_st->pkt.size) {
int off = offset / asf_st->ds_chunk_size;
int row = off / asf_st->ds_span;
int col = off % asf_st->ds_span;
int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
memcpy(newdata + offset,
asf_st->pkt.data + idx * asf_st->ds_chunk_size,
asf_st->ds_chunk_size);
offset += asf_st->ds_chunk_size;
if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * "
"ds_span (%d %d %d)\n", asf_st->pkt.size,
asf_st->ds_packet_size, asf_st->ds_span);
} else {
/* packet descrambling */
uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
if (newdata) {
int offset = 0;
memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
while (offset < asf_st->pkt.size) {
int off = offset / asf_st->ds_chunk_size;
int row = off / asf_st->ds_span;
int col = off % asf_st->ds_span;
int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
memcpy(newdata + offset,
asf_st->pkt.data + idx * asf_st->ds_chunk_size,
asf_st->ds_chunk_size);
offset += asf_st->ds_chunk_size;
}
av_free(asf_st->pkt.data);
asf_st->pkt.data = newdata;
}
av_free(asf_st->pkt.data);
asf_st->pkt.data = newdata;
}
}
}
asf_st->frag_offset = 0;
*pkt= asf_st->pkt;
asf_st->pkt.size = 0;
asf_st->pkt.data = 0;
asf_st->frag_offset = 0;
*pkt = asf_st->pkt;
asf_st->pkt.size = 0;
asf_st->pkt.data = 0;
asf_st->pkt.side_data_elems = 0;
asf_st->pkt.side_data = NULL;
asf_st->pkt.side_data = NULL;
break; // packet completed
}
}


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