static int qcp_probe(AVProbeData *pd)
{
if (AV_RL32(pd->buf ) == AV_RL32("RIFF") &&
AV_RL64(pd->buf+8) == AV_RL64("QLCMfmt "))
return AVPROBE_SCORE_MAX;
return 0;
}
static int asf_header_parser(MMSContext *mms)
{
uint8_t *p = mms->asf_header;
uint8_t *end;
int flags, stream_id, real_header_size;
mms->stream_num = 0;
if (mms->asf_header_size < sizeof(ff_asf_guid) * 2 + 22 ||
memcmp(p, ff_asf_header, sizeof(ff_asf_guid)))
return -1;
real_header_size = AV_RL64(p + sizeof(ff_asf_guid));
end = mms->asf_header + real_header_size;
p += sizeof(ff_asf_guid) + 14;
while(end - p >= sizeof(ff_asf_guid) + 8) {
uint64_t chunksize = AV_RL64(p + sizeof(ff_asf_guid));
if (!chunksize || chunksize > end - p) {
dprintf(NULL, "chunksize is exceptional value:%d!\n", chunksize);
return -1;
}
if (!memcmp(p, ff_asf_file_header, sizeof(ff_asf_guid))) {
/* read packet size */
if (end - p > sizeof(ff_asf_guid) * 2 + 68) {
mms->asf_packet_len = AV_RL32(p + sizeof(ff_asf_guid) * 2 + 64);
if (mms->asf_packet_len <= 0 || mms->asf_packet_len > sizeof(mms->in_buffer)) {
dprintf(NULL,"Too large packet len:%d"
" may overwrite in_buffer when padding", mms->asf_packet_len);
return -1;
}
}
} else if (!memcmp(p, ff_asf_stream_header, sizeof(ff_asf_guid))) {
flags = AV_RL16(p + sizeof(ff_asf_guid)*3 + 24);
stream_id = flags & 0x7F;
//The second condition is for checking CS_PKT_STREAM_ID_REQUEST packet size,
//we can calcuate the packet size by stream_num.
//Please see function send_stream_selection_request().
if (mms->stream_num < MAX_STREAMS &&
46 + mms->stream_num * 6 < sizeof(mms->out_buffer)) {
mms->streams[mms->stream_num].id = stream_id;
mms->stream_num++;
} else {
dprintf(NULL, "Too many streams.\n");
return -1;
}
}
p += chunksize;
}
return 0;
}
/**
* From MSDN 2.2.1.4, we learn that ASF data packets over RTP should not
* contain any padding. Unfortunately, the header min/max_pktsize are not
* updated (thus making min_pktsize invalid). Here, we "fix" these faulty
* min_pktsize values in the ASF file header.
* @return 0 on success, <0 on failure (currently -1).
*/
static int rtp_asf_fix_header(uint8_t *buf, int len)
{
uint8_t *p = buf, *end = buf + len;
if (len < sizeof(ff_asf_guid) * 2 + 22 ||
memcmp(p, ff_asf_header, sizeof(ff_asf_guid))) {
return -1;
}
p += sizeof(ff_asf_guid) + 14;
do {
uint64_t chunksize = AV_RL64(p + sizeof(ff_asf_guid));
if (memcmp(p, ff_asf_file_header, sizeof(ff_asf_guid))) {
if (chunksize > end - p)
return -1;
p += chunksize;
continue;
}
/* skip most of the file header, to min_pktsize */
p += 6 * 8 + 3 * 4 + sizeof(ff_asf_guid) * 2;
if (p + 8 <= end && AV_RL32(p) == AV_RL32(p + 4)) {
/* and set that to zero */
AV_WL32(p, 0);
return 0;
}
break;
} while (end - p >= sizeof(ff_asf_guid) + 8);
return -1;
}
static int asf_header_parser(MMSContext *mms)
{
uint8_t *p = mms->asf_header;
uint8_t *end;
int flags, stream_id;
mms->stream_num = 0;
if (mms->asf_header_size < sizeof(ff_asf_guid) * 2 + 22 ||
memcmp(p, ff_asf_header, sizeof(ff_asf_guid))) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (invalid ASF header, size=%d)\n",
mms->asf_header_size);
return AVERROR_INVALIDDATA;
}
end = mms->asf_header + mms->asf_header_size;
p += sizeof(ff_asf_guid) + 14;
while(end - p >= sizeof(ff_asf_guid) + 8) {
uint64_t chunksize = AV_RL64(p + sizeof(ff_asf_guid));
if (!chunksize || chunksize > end - p) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (header chunksize %"PRId64" is invalid)\n",
chunksize);
return AVERROR_INVALIDDATA;
}
if (!memcmp(p, ff_asf_file_header, sizeof(ff_asf_guid))) {
/* read packet size */
if (end - p > sizeof(ff_asf_guid) * 2 + 68) {
mms->asf_packet_len = AV_RL32(p + sizeof(ff_asf_guid) * 2 + 64);
if (mms->asf_packet_len <= 0 || mms->asf_packet_len > sizeof(mms->in_buffer)) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (too large pkt_len %d)\n",
mms->asf_packet_len);
return AVERROR_INVALIDDATA;
}
}
} else if (!memcmp(p, ff_asf_stream_header, sizeof(ff_asf_guid))) {
flags = AV_RL16(p + sizeof(ff_asf_guid)*3 + 24);
stream_id = flags & 0x7F;
//The second condition is for checking CS_PKT_STREAM_ID_REQUEST packet size,
//we can calcuate the packet size by stream_num.
//Please see function send_stream_selection_request().
if (mms->stream_num < MAX_STREAMS &&
46 + mms->stream_num * 6 < sizeof(mms->out_buffer)) {
mms->streams[mms->stream_num].id = stream_id;
mms->stream_num++;
} else {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (too many A/V streams)\n");
return AVERROR_INVALIDDATA;
}
} else if (!memcmp(p, ff_asf_head1_guid, sizeof(ff_asf_guid))) {
chunksize = 46; // see references [2] section 3.4. This should be set 46.
}
p += chunksize;
}
return 0;
}
static uint64_t inline get_k2(const uint8_t *src)
{
uint64_t k = AV_RL64(src + 8);
k *= c2;
k = ROT(k, 33);
k *= c1;
return k;
}
static uint64_t inline get_k1(const uint8_t *src)
{
uint64_t k = AV_RL64(src);
k *= c1;
k = ROT(k, 31);
k *= c2;
return k;
}
/* param change side data*/
static void dump_paramchange(void *ctx, AVPacketSideData *sd)
{
int size = sd->size;
const uint8_t *data = sd->data;
uint32_t flags, channels, sample_rate, width, height;
uint64_t layout;
if (!data || sd->size < 4)
goto fail;
flags = AV_RL32(data);
data += 4;
size -= 4;
if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
if (size < 4)
goto fail;
channels = AV_RL32(data);
data += 4;
size -= 4;
av_log(ctx, AV_LOG_INFO, "channel count %d, ", channels);
}
if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
if (size < 8)
goto fail;
layout = AV_RL64(data);
data += 8;
size -= 8;
av_log(ctx, AV_LOG_INFO,
"channel layout: %s, ", av_get_channel_name(layout));
}
if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
if (size < 4)
goto fail;
sample_rate = AV_RL32(data);
data += 4;
size -= 4;
av_log(ctx, AV_LOG_INFO, "sample_rate %d, ", sample_rate);
}
if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
if (size < 8)
goto fail;
width = AV_RL32(data);
data += 4;
size -= 4;
height = AV_RL32(data);
data += 4;
size -= 4;
av_log(ctx, AV_LOG_INFO, "width %d height %d", width, height);
}
return;
fail:
av_log(ctx, AV_LOG_INFO, "unknown param");
}
static double get_f64l(uint8_t *p)
{
return av_int2double(AV_RL64(p));
}
static int nist_probe(AVProbeData *p)
{
if (AV_RL64(p->buf) == AV_RL64("NIST_1A\x0a"))
return AVPROBE_SCORE_MAX;
return 0;
}
static int mxg_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret;
unsigned int size;
uint8_t *startmarker_ptr, *end, *search_end, marker;
MXGContext *mxg = s->priv_data;
while (!url_feof(s->pb) && !s->pb->error){
if (mxg->cache_size <= OVERREAD_SIZE) {
/* update internal buffer */
ret = mxg_update_cache(s, DEFAULT_PACKET_SIZE + OVERREAD_SIZE);
if (ret < 0)
return ret;
}
end = mxg->buffer_ptr + mxg->cache_size;
/* find start marker - 0xff */
if (mxg->cache_size > OVERREAD_SIZE) {
search_end = end - OVERREAD_SIZE;
startmarker_ptr = mxg_find_startmarker(mxg->buffer_ptr, search_end);
} else {
search_end = end;
startmarker_ptr = mxg_find_startmarker(mxg->buffer_ptr, search_end);
if (startmarker_ptr >= search_end - 1 ||
*(startmarker_ptr + 1) != EOI) break;
}
if (startmarker_ptr != search_end) { /* start marker found */
marker = *(startmarker_ptr + 1);
mxg->buffer_ptr = startmarker_ptr + 2;
mxg->cache_size = end - mxg->buffer_ptr;
if (marker == SOI) {
mxg->soi_ptr = startmarker_ptr;
} else if (marker == EOI) {
if (!mxg->soi_ptr) {
av_log(s, AV_LOG_WARNING, "Found EOI before SOI, skipping\n");
continue;
}
pkt->pts = pkt->dts = mxg->dts;
pkt->stream_index = 0;
pkt->destruct = NULL;
pkt->size = mxg->buffer_ptr - mxg->soi_ptr;
pkt->data = mxg->soi_ptr;
if (mxg->soi_ptr - mxg->buffer > mxg->cache_size) {
if (mxg->cache_size > 0) {
memcpy(mxg->buffer, mxg->buffer_ptr, mxg->cache_size);
}
mxg->buffer_ptr = mxg->buffer;
}
mxg->soi_ptr = 0;
return pkt->size;
} else if ( (SOF0 <= marker && marker <= SOF15) ||
(SOS <= marker && marker <= COM) ) {
/* all other markers that start marker segment also contain
length value (see specification for JPEG Annex B.1) */
size = AV_RB16(mxg->buffer_ptr);
if (size < 2)
return AVERROR(EINVAL);
if (mxg->cache_size < size) {
ret = mxg_update_cache(s, size);
if (ret < 0)
return ret;
startmarker_ptr = mxg->buffer_ptr - 2;
mxg->cache_size = 0;
} else {
mxg->cache_size -= size;
}
mxg->buffer_ptr += size;
if (marker == APP13 && size >= 16) { /* audio data */
/* time (GMT) of first sample in usec since 1970, little-endian */
pkt->pts = pkt->dts = AV_RL64(startmarker_ptr + 8);
pkt->stream_index = 1;
pkt->destruct = NULL;
pkt->size = size - 14;
pkt->data = startmarker_ptr + 16;
if (startmarker_ptr - mxg->buffer > mxg->cache_size) {
if (mxg->cache_size > 0) {
memcpy(mxg->buffer, mxg->buffer_ptr, mxg->cache_size);
}
mxg->buffer_ptr = mxg->buffer;
}
return pkt->size;
} else if (marker == COM && size >= 18 &&
!strncmp(startmarker_ptr + 4, "MXF", 3)) {
/* time (GMT) of video frame in usec since 1970, little-endian */
mxg->dts = AV_RL64(startmarker_ptr + 12);
}
}
} else {
/* start marker not found */
mxg->buffer_ptr = search_end;
mxg->cache_size = OVERREAD_SIZE;
}
}
return AVERROR_EOF;
}
int ff_mms_asf_header_parser(MMSContext *mms)
{
uint8_t *p = mms->asf_header;
uint8_t *end;
int flags, stream_id;
mms->stream_num = 0;
if (mms->asf_header_size < sizeof(ff_asf_guid) * 2 + 22 ||
memcmp(p, ff_asf_header, sizeof(ff_asf_guid))) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (invalid ASF header, size=%d)\n",
mms->asf_header_size);
return AVERROR_INVALIDDATA;
}
end = mms->asf_header + mms->asf_header_size;
p += sizeof(ff_asf_guid) + 14;
while(end - p >= sizeof(ff_asf_guid) + 8) {
uint64_t chunksize;
if (!memcmp(p, ff_asf_data_header, sizeof(ff_asf_guid))) {
chunksize = 50; // see Reference [2] section 5.1
} else {
chunksize = AV_RL64(p + sizeof(ff_asf_guid));
}
if (!chunksize || chunksize > end - p) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (header chunksize %"PRId64" is invalid)\n",
chunksize);
return AVERROR_INVALIDDATA;
}
if (!memcmp(p, ff_asf_file_header, sizeof(ff_asf_guid))) {
/* read packet size */
if (end - p > sizeof(ff_asf_guid) * 2 + 68) {
mms->asf_packet_len = AV_RL32(p + sizeof(ff_asf_guid) * 2 + 64);
mms->file_size = AV_RL64(p + sizeof(ff_asf_guid) * 2 + 8);
mms->flags =AV_RL32(p+sizeof(ff_asf_guid)*2+56);
if (mms->asf_packet_len <= 0 || mms->asf_packet_len > sizeof(mms->in_buffer)) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (too large pkt_len %d)\n",
mms->asf_packet_len);
return AVERROR_INVALIDDATA;
}
}
} else if (!memcmp(p, ff_asf_stream_header, sizeof(ff_asf_guid))) {
flags = AV_RL16(p + sizeof(ff_asf_guid)*3 + 24);
stream_id = flags & 0x7F;
//The second condition is for checking CS_PKT_STREAM_ID_REQUEST packet size,
//we can calcuate the packet size by stream_num.
//Please see function send_stream_selection_request().
if (mms->stream_num < MMS_MAX_STREAMS &&
46 + mms->stream_num * 6 < sizeof(mms->out_buffer)) {
mms->streams = av_fast_realloc(mms->streams,
&mms->nb_streams_allocated,
(mms->stream_num + 1) * sizeof(MMSStream));
mms->streams[mms->stream_num].id = stream_id;
mms->stream_num++;
} else {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (too many A/V streams)\n");
return AVERROR_INVALIDDATA;
}
} else if (!memcmp(p, ff_asf_ext_stream_header, sizeof(ff_asf_guid))) {
if (end - p >= 88) {
int stream_count = AV_RL16(p + 84), ext_len_count = AV_RL16(p + 86);
uint64_t skip_bytes = 88;
while (stream_count--) {
if (end - p < skip_bytes + 4) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (next stream name length is not in the buffer)\n");
return AVERROR_INVALIDDATA;
}
skip_bytes += 4 + AV_RL16(p + skip_bytes + 2);
}
while (ext_len_count--) {
if (end - p < skip_bytes + 22) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (next extension system info length is not in the buffer)\n");
return AVERROR_INVALIDDATA;
}
skip_bytes += 22 + AV_RL32(p + skip_bytes + 18);
}
if (end - p < skip_bytes) {
av_log(NULL, AV_LOG_ERROR,
"Corrupt stream (the last extension system info length is invalid)\n");
return AVERROR_INVALIDDATA;
}
if (chunksize - skip_bytes > 24)
chunksize = skip_bytes;
}
} else if (!memcmp(p, ff_asf_head1_guid, sizeof(ff_asf_guid))) {
chunksize = 46; // see references [2] section 3.4. This should be set 46.
}
p += chunksize;
}
return 0;
}
static int skeleton_header(AVFormatContext *s, int idx)
{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
uint8_t *buf = os->buf + os->pstart;
int version_major, version_minor;
int64_t start_num, start_den;
uint64_t start_granule;
int target_idx, start_time;
strcpy(st->codec->codec_name, "skeleton");
st->codec->codec_type = AVMEDIA_TYPE_DATA;
if (os->psize < 8)
return -1;
if (!strncmp(buf, "fishead", 8)) {
if (os->psize < 64)
return -1;
version_major = AV_RL16(buf+8);
version_minor = AV_RL16(buf+10);
if (version_major != 3) {
av_log(s, AV_LOG_WARNING, "Unknown skeleton version %d.%d\n",
version_major, version_minor);
return -1;
}
// This is the overall start time. We use it for the start time of
// of the skeleton stream since if left unset lavf assumes 0,
// which we don't want since skeleton is timeless
// FIXME: the real meaning of this field is "start playback at
// this time which can be in the middle of a packet
start_num = AV_RL64(buf+12);
start_den = AV_RL64(buf+20);
if (start_den) {
int base_den;
av_reduce(&start_time, &base_den, start_num, start_den, INT_MAX);
avpriv_set_pts_info(st, 64, 1, base_den);
os->lastpts =
st->start_time = start_time;
}
} else if (!strncmp(buf, "fisbone", 8)) {
if (os->psize < 52)
return -1;
target_idx = ogg_find_stream(ogg, AV_RL32(buf+12));
start_granule = AV_RL64(buf+36);
if (os->start_granule != OGG_NOGRANULE_VALUE) {
av_log_missing_feature(s,
"multiple fisbone for the same stream", 0);
return 1;
}
if (target_idx >= 0 && start_granule != OGG_NOGRANULE_VALUE) {
os->start_granule = start_granule;
}
}
return 1;
}
static int get_ext_stream_properties(char *buf, int buf_len, int stream_num, struct asf_priv* asf, int is_video)
{
int pos=0;
uint8_t *buffer = &buf[0];
uint64_t avg_ft;
unsigned bitrate;
while ((pos = find_asf_guid(buf, asf_ext_stream_header, pos, buf_len)) >= 0) {
int this_stream_num, stnamect, payct, i;
int buf_max_index=pos+50;
if (buf_max_index > buf_len) return 0;
buffer = &buf[pos];
// the following info is available
// some of it may be useful but we're skipping it for now
// starttime(8 bytes), endtime(8),
// leak-datarate(4), bucket-datasize(4), init-bucket-fullness(4),
// alt-leak-datarate(4), alt-bucket-datasize(4), alt-init-bucket-fullness(4),
// max-object-size(4),
// flags(4) (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
buffer += 8+8;
bitrate = AV_RL32(buffer);
buffer += 8*4;
this_stream_num=AV_RL16(buffer);buffer+=2;
if (this_stream_num == stream_num) {
buf_max_index+=14;
if (buf_max_index > buf_len) return 0;
buffer+=2; //skip stream-language-id-index
avg_ft = AV_RL64(buffer); // provided in 100ns units
buffer+=8;
asf->bps = bitrate / 8;
// after this are values for stream-name-count and
// payload-extension-system-count
// followed by associated info for each
stnamect = AV_RL16(buffer);buffer+=2;
payct = AV_RL16(buffer);buffer+=2;
// need to read stream names if present in order
// to get lengths - values are ignored for now
for (i=0; i<stnamect; i++) {
int stream_name_len;
buf_max_index+=4;
if (buf_max_index > buf_len) return 0;
buffer+=2; //language_id_index
stream_name_len = AV_RL16(buffer);buffer+=2;
buffer+=stream_name_len; //stream_name
buf_max_index+=stream_name_len;
if (buf_max_index > buf_len) return 0;
}
if (is_video) {
asf->vid_repdata_count = payct;
asf->vid_repdata_sizes = malloc(payct*sizeof(int));
} else {
asf->aud_repdata_count = payct;
asf->aud_repdata_sizes = malloc(payct*sizeof(int));
}
for (i=0; i<payct; i++) {
int payload_len;
buf_max_index+=22;
if (buf_max_index > buf_len) return 0;
// Each payload extension definition starts with a GUID.
// In dvr-ms files one of these indicates the presence an
// extension that contains pts values and this is always present
// in the video and audio streams.
// Another GUID indicates the presence of an extension
// that contains useful video frame demuxing information.
// Note that the extension data in each packet does not contain
// these GUIDs and that this header section defines the order the data
// will appear in.
if (memcmp(buffer, asf_dvr_ms_timing_rep_data, 16) == 0) {
if (is_video)
asf->vid_ext_timing_index = i;
else
asf->aud_ext_timing_index = i;
} else if (is_video && memcmp(buffer, asf_dvr_ms_vid_frame_rep_data, 16) == 0)
asf->vid_ext_frame_index = i;
buffer+=16;
payload_len = AV_RL16(buffer);buffer+=2;
if (is_video)
asf->vid_repdata_sizes[i] = payload_len;
else
asf->aud_repdata_sizes[i] = payload_len;
buffer+=4;//sys_len
}
return 1;
}
}
return 1;
}
static int dsf_probe(AVProbeData *p)
{
if (p->buf_size < 12 || memcmp(p->buf, "DSD ", 4) || AV_RL64(p->buf + 4) != 28)
return 0;
return AVPROBE_SCORE_MAX;
}
static int asf_streaming_parse_header(int fd, streaming_ctrl_t* streaming_ctrl) {
ASF_stream_chunck_t chunk;
asf_http_streaming_ctrl_t* asf_ctrl = streaming_ctrl->data;
char* buffer=NULL, *chunk_buffer=NULL;
int i,r,size,pos = 0;
int start;
int buffer_size = 0;
int chunk_size2read = 0;
int bw = streaming_ctrl->bandwidth;
int *v_rates = NULL, *a_rates = NULL;
int v_rate = 0, a_rate = 0, a_idx = -1, v_idx = -1;
if(asf_ctrl == NULL) return -1;
// The ASF header can be in several network chunks. For example if the content description
// is big, the ASF header will be split in 2 network chunk.
// So we need to retrieve all the chunk before starting to parse the header.
do {
if (asf_read_wrapper(fd, &chunk, sizeof(ASF_stream_chunck_t), streaming_ctrl) <= 0)
return -1;
// Endian handling of the stream chunk
le2me_ASF_stream_chunck_t(&chunk);
size = asf_streaming( &chunk, &r) - sizeof(ASF_stream_chunck_t);
if(r) mp_msg(MSGT_NETWORK,MSGL_WARN,MSGTR_MPDEMUX_ASF_WarnDropHeader);
if(size < 0){
mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_ASF_ErrorParsingChunkHeader);
return -1;
}
if (chunk.type != ASF_STREAMING_HEADER) {
mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_ASF_NoHeaderAtFirstChunk);
return -1;
}
// audit: do not overflow buffer_size
if (size > SIZE_MAX - buffer_size) return -1;
buffer = malloc(size+buffer_size);
if(buffer == NULL) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,MSGTR_MPDEMUX_ASF_BufferMallocFailed,size+buffer_size);
return -1;
}
if( chunk_buffer!=NULL ) {
memcpy( buffer, chunk_buffer, buffer_size );
free( chunk_buffer );
}
chunk_buffer = buffer;
buffer += buffer_size;
buffer_size += size;
if (asf_read_wrapper(fd, buffer, size, streaming_ctrl) <= 0)
return -1;
if( chunk_size2read==0 ) {
ASF_header_t *asfh = (ASF_header_t *)buffer;
if(size < (int)sizeof(ASF_header_t)) {
mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_ASF_ErrChunk2Small);
return -1;
} else mp_msg(MSGT_NETWORK,MSGL_DBG2,"Got chunk\n");
chunk_size2read = AV_RL64(&asfh->objh.size);
mp_msg(MSGT_NETWORK,MSGL_DBG2,"Size 2 read=%d\n", chunk_size2read);
}
} while( buffer_size<chunk_size2read);
buffer = chunk_buffer;
size = buffer_size;
start = sizeof(ASF_header_t);
pos = find_asf_guid(buffer, asf_file_header_guid, start, size);
if (pos >= 0) {
ASF_file_header_t *fileh = (ASF_file_header_t *) &buffer[pos];
pos += sizeof(ASF_file_header_t);
if (pos > size) goto len_err_out;
/*
if(fileh.packetsize != fileh.packetsize2) {
printf("Error packetsize check don't match\n");
return -1;
}
*/
asf_ctrl->packet_size = AV_RL32(&fileh->max_packet_size);
// before playing.
// preroll: time in ms to bufferize before playing
streaming_ctrl->prebuffer_size = (unsigned int)(((double)fileh->preroll/1000.0)*((double)fileh->max_bitrate/8.0));
}
pos = start;
while ((pos = find_asf_guid(buffer, asf_stream_header_guid, pos, size)) >= 0)
{
ASF_stream_header_t *streamh = (ASF_stream_header_t *)&buffer[pos];
pos += sizeof(ASF_stream_header_t);
if (pos > size) goto len_err_out;
switch(ASF_LOAD_GUID_PREFIX(streamh->type)) {
case 0xF8699E40 : // audio stream
if(asf_ctrl->audio_streams == NULL){
asf_ctrl->audio_streams = malloc(sizeof(int));
asf_ctrl->n_audio = 1;
} else {
asf_ctrl->n_audio++;
asf_ctrl->audio_streams = realloc(asf_ctrl->audio_streams,
asf_ctrl->n_audio*sizeof(int));
}
asf_ctrl->audio_streams[asf_ctrl->n_audio-1] = AV_RL16(&streamh->stream_no);
break;
case 0xBC19EFC0 : // video stream
if(asf_ctrl->video_streams == NULL){
asf_ctrl->video_streams = malloc(sizeof(int));
asf_ctrl->n_video = 1;
} else {
asf_ctrl->n_video++;
asf_ctrl->video_streams = realloc(asf_ctrl->video_streams,
asf_ctrl->n_video*sizeof(int));
}
asf_ctrl->video_streams[asf_ctrl->n_video-1] = AV_RL16(&streamh->stream_no);
break;
}
}
// always allocate to avoid lots of ifs later
v_rates = calloc(asf_ctrl->n_video, sizeof(int));
a_rates = calloc(asf_ctrl->n_audio, sizeof(int));
pos = find_asf_guid(buffer, asf_stream_group_guid, start, size);
if (pos >= 0) {
// stream bitrate properties object
int stream_count;
char *ptr = &buffer[pos];
char *end = &buffer[size];
mp_msg(MSGT_NETWORK, MSGL_V, "Stream bitrate properties object\n");
if (ptr + 2 > end) goto len_err_out;
stream_count = AV_RL16(ptr);
ptr += 2;
mp_msg(MSGT_NETWORK, MSGL_V, " stream count=[0x%x][%u]\n",
stream_count, stream_count );
for( i=0 ; i<stream_count ; i++ ) {
uint32_t rate;
int id;
int j;
if (ptr + 6 > end) goto len_err_out;
id = AV_RL16(ptr);
ptr += 2;
rate = AV_RL32(ptr);
ptr += 4;
mp_msg(MSGT_NETWORK, MSGL_V,
" stream id=[0x%x][%u]\n", id, id);
mp_msg(MSGT_NETWORK, MSGL_V,
" max bitrate=[0x%x][%u]\n", rate, rate);
for (j = 0; j < asf_ctrl->n_video; j++) {
if (id == asf_ctrl->video_streams[j]) {
mp_msg(MSGT_NETWORK, MSGL_V, " is video stream\n");
v_rates[j] = rate;
break;
}
}
for (j = 0; j < asf_ctrl->n_audio; j++) {
if (id == asf_ctrl->audio_streams[j]) {
mp_msg(MSGT_NETWORK, MSGL_V, " is audio stream\n");
a_rates[j] = rate;
break;
}
}
}
}
free(buffer);
// automatic stream selection based on bandwidth
if (bw == 0) bw = INT_MAX;
mp_msg(MSGT_NETWORK, MSGL_V, "Max bandwidth set to %d\n", bw);
if (asf_ctrl->n_audio) {
// find lowest-bitrate audio stream
a_rate = a_rates[0];
a_idx = 0;
for (i = 0; i < asf_ctrl->n_audio; i++) {
if (a_rates[i] < a_rate) {
a_rate = a_rates[i];
a_idx = i;
}
}
if (max_idx(asf_ctrl->n_video, v_rates, bw - a_rate) < 0) {
// both audio and video are not possible, try video only next
a_idx = -1;
a_rate = 0;
}
}
// find best video stream
v_idx = max_idx(asf_ctrl->n_video, v_rates, bw - a_rate);
if (v_idx >= 0)
v_rate = v_rates[v_idx];
// find best audio stream
a_idx = max_idx(asf_ctrl->n_audio, a_rates, bw - v_rate);
free(v_rates);
free(a_rates);
if (a_idx < 0 && v_idx < 0) {
mp_msg(MSGT_NETWORK, MSGL_FATAL, MSGTR_MPDEMUX_ASF_Bandwidth2SmallCannotPlay);
return -1;
}
if (audio_id > 0)
// a audio stream was forced
asf_ctrl->audio_id = audio_id;
else if (a_idx >= 0)
asf_ctrl->audio_id = asf_ctrl->audio_streams[a_idx];
else if (asf_ctrl->n_audio) {
mp_msg(MSGT_NETWORK, MSGL_WARN, MSGTR_MPDEMUX_ASF_Bandwidth2SmallDeselectedAudio);
audio_id = -2;
}
if (video_id > 0)
// a video stream was forced
asf_ctrl->video_id = video_id;
else if (v_idx >= 0)
asf_ctrl->video_id = asf_ctrl->video_streams[v_idx];
else if (asf_ctrl->n_video) {
mp_msg(MSGT_NETWORK, MSGL_WARN, MSGTR_MPDEMUX_ASF_Bandwidth2SmallDeselectedVideo);
video_id = -2;
}
return 1;
len_err_out:
mp_msg(MSGT_NETWORK, MSGL_FATAL, MSGTR_MPDEMUX_ASF_InvalidLenInHeader);
free(buffer);
free(v_rates);
free(a_rates);
return -1;
}
