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mpv/libmpdemux/asfheader.c

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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
// .asf fileformat docs from http://divx.euro.ru
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "libavutil/common.h"
#include "ffmpeg_files/intreadwrite.h"
#include "mp_msg.h"
#include "stream/stream.h"
#include "aviprint.h"
#include "demuxer.h"
#include "stheader.h"
#include "asf.h"
#include "asfguid.h"
#include "asfheader.h"
typedef struct {
// must be 0 for metadata record, might be non-zero for metadata lib record
uint16_t lang_list_index;
uint16_t stream_num;
uint16_t name_length;
uint16_t data_type;
uint32_t data_length;
uint16_t* name;
void* data;
} ASF_meta_record_t;
static char* get_ucs2str(const uint16_t* inbuf, uint16_t inlen)
{
char* outbuf = calloc(inlen, 2);
char* q;
int i;
if (!outbuf) {
mp_tmsg(MSGT_HEADER, MSGL_ERR, "Memory allocation failed.\n");
return NULL;
}
q = outbuf;
for (i = 0; i < inlen / 2; i++) {
uint8_t tmp;
PUT_UTF8(AV_RL16(&inbuf[i]), tmp, *q++ = tmp;)
}
return outbuf;
}
static const char* asf_chunk_type(unsigned char* guid) {
static char tmp[60];
char *p;
int i;
switch(ASF_LOAD_GUID_PREFIX(guid)){
case ASF_GUID_PREFIX_audio_stream:
return "guid_audio_stream";
case ASF_GUID_PREFIX_ext_audio_stream:
return "guid_ext_audio_stream";
case ASF_GUID_PREFIX_ext_stream_embed_stream_header:
return "guid_ext_stream_embed_stream_header";
case ASF_GUID_PREFIX_video_stream:
return "guid_video_stream";
case ASF_GUID_PREFIX_audio_conceal_none:
return "guid_audio_conceal_none";
case ASF_GUID_PREFIX_audio_conceal_interleave:
return "guid_audio_conceal_interleave";
case ASF_GUID_PREFIX_header:
return "guid_header";
case ASF_GUID_PREFIX_data_chunk:
return "guid_data_chunk";
case ASF_GUID_PREFIX_index_chunk:
return "guid_index_chunk";
case ASF_GUID_PREFIX_stream_header:
return "guid_stream_header";
case ASF_GUID_PREFIX_header_2_0:
return "guid_header_2_0";
case ASF_GUID_PREFIX_file_header:
return "guid_file_header";
case ASF_GUID_PREFIX_content_desc:
return "guid_content_desc";
case ASF_GUID_PREFIX_dvr_ms_timing_rep_data:
return "guid_dvr_ms_timing_rep_data";
case ASF_GUID_PREFIX_dvr_ms_vid_frame_rep_data:
return "guid_dvr_ms_vid_frame_rep_data";
default:
strcpy(tmp, "unknown guid ");
p = tmp + strlen(tmp);
for (i = 0; i < 16; i++) {
if ((1 << i) & ((1<<4) | (1<<6) | (1<<8))) *p++ = '-';
sprintf(p, "%02x", guid[i]);
p += 2;
}
return tmp;
}
}
int asf_check_header(demuxer_t *demuxer){
unsigned char asfhdrguid[16]={0x30,0x26,0xB2,0x75,0x8E,0x66,0xCF,0x11,0xA6,0xD9,0x00,0xAA,0x00,0x62,0xCE,0x6C};
struct asf_priv* asf = calloc(1,sizeof(*asf));
asf->scrambling_h=asf->scrambling_w=asf->scrambling_b=1;
stream_read(demuxer->stream,(char*) &asf->header,sizeof(asf->header)); // header obj
le2me_ASF_header_t(&asf->header); // swap to machine endian
// for(i=0;i<16;i++) printf(" %02X",temp[i]);printf("\n");
// for(i=0;i<16;i++) printf(" %02X",asfhdrguid[i]);printf("\n");
if(memcmp(asfhdrguid,asf->header.objh.guid,16)){
mp_msg(MSGT_HEADER,MSGL_V,"ASF_check: not ASF guid!\n");
free(asf);
return 0; // not ASF guid
}
if(asf->header.cno>256){
mp_msg(MSGT_HEADER,MSGL_V,"ASF_check: invalid subchunks_no %d\n",(int) asf->header.cno);
free(asf);
return 0; // invalid header???
}
demuxer->priv = asf;
return DEMUXER_TYPE_ASF;
}
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;
}
#define CHECKDEC(l, n) if (((l) -= (n)) < 0) return 0
static char* read_meta_record(ASF_meta_record_t* dest, char* buf,
int* buf_len)
{
CHECKDEC(*buf_len, 2 + 2 + 2 + 2 + 4);
dest->lang_list_index = AV_RL16(buf);
dest->stream_num = AV_RL16(&buf[2]);
dest->name_length = AV_RL16(&buf[4]);
dest->data_type = AV_RL16(&buf[6]);
dest->data_length = AV_RL32(&buf[8]);
buf += 2 + 2 + 2 + 2 + 4;
CHECKDEC(*buf_len, dest->name_length);
dest->name = (uint16_t*)buf;
buf += dest->name_length;
CHECKDEC(*buf_len, dest->data_length);
dest->data = buf;
buf += dest->data_length;
return buf;
}
static int get_meta(char *buf, int buf_len, int this_stream_num,
float* asp_ratio)
{
int pos = 0;
uint16_t records_count;
uint16_t x = 0, y = 0;
if ((pos = find_asf_guid(buf, asf_metadata_header, pos, buf_len)) < 0)
return 0;
CHECKDEC(buf_len, pos);
buf += pos;
CHECKDEC(buf_len, 2);
records_count = AV_RL16(buf);
buf += 2;
while (records_count--) {
ASF_meta_record_t record_entry;
char* name;
if (!(buf = read_meta_record(&record_entry, buf, &buf_len)))
return 0;
/* reserved, must be zero */
if (record_entry.lang_list_index)
continue;
/* match stream number: 0 to match all */
if (record_entry.stream_num && record_entry.stream_num != this_stream_num)
continue;
if (!(name = get_ucs2str(record_entry.name, record_entry.name_length))) {
mp_tmsg(MSGT_HEADER, MSGL_ERR, "Memory allocation failed.\n");
continue;
}
if (strcmp(name, "AspectRatioX") == 0)
x = AV_RL16(record_entry.data);
else if (strcmp(name, "AspectRatioY") == 0)
y = AV_RL16(record_entry.data);
free(name);
}
if (x && y) {
*asp_ratio = (float)x / (float)y;
return 1;
}
return 0;
}
static int is_drm(char* buf, int buf_len)
{
uint32_t data_len, type_len, key_len, url_len;
int pos = find_asf_guid(buf, asf_content_encryption, 0, buf_len);
if (pos < 0)
return 0;
CHECKDEC(buf_len, pos + 4);
buf += pos;
data_len = AV_RL32(buf);
buf += 4;
CHECKDEC(buf_len, data_len);
buf += data_len;
type_len = AV_RL32(buf);
if (type_len < 4)
return 0;
CHECKDEC(buf_len, 4 + type_len + 4);
buf += 4;
if (buf[0] != 'D' || buf[1] != 'R' || buf[2] != 'M' || buf[3] != '\0')
return 0;
buf += type_len;
key_len = AV_RL32(buf);
CHECKDEC(buf_len, key_len + 4);
buf += 4;
buf[key_len - 1] = '\0';
mp_msg(MSGT_HEADER, MSGL_V, "DRM Key ID: %s\n", buf);
buf += key_len;
url_len = AV_RL32(buf);
CHECKDEC(buf_len, url_len);
buf += 4;
buf[url_len - 1] = '\0';
mp_tmsg(MSGT_HEADER, MSGL_INFO, "DRM License URL: %s\n", buf);
return 1;
}
static int asf_init_audio_stream(demuxer_t *demuxer,struct asf_priv* asf, sh_audio_t* sh_audio, ASF_stream_header_t *streamh, int *ppos, uint8_t** buf, char *hdr, unsigned int hdr_len)
{
uint8_t *buffer = *buf;
int pos = *ppos;
sh_audio->wf=calloc((streamh->type_size<sizeof(WAVEFORMATEX))?sizeof(WAVEFORMATEX):streamh->type_size,1);
memcpy(sh_audio->wf,buffer,streamh->type_size);
le2me_WAVEFORMATEX(sh_audio->wf);
if( mp_msg_test(MSGT_HEADER,MSGL_V) ) print_wave_header(sh_audio->wf,MSGL_V);
if(ASF_LOAD_GUID_PREFIX(streamh->concealment)==ASF_GUID_PREFIX_audio_conceal_interleave){
buffer = &hdr[pos];
pos += streamh->stream_size;
if (pos > hdr_len) return 0;
asf->scrambling_h=buffer[0];
asf->scrambling_w=(buffer[2]<<8)|buffer[1];
asf->scrambling_b=(buffer[4]<<8)|buffer[3];
if(asf->scrambling_b>0){
asf->scrambling_w/=asf->scrambling_b;
}
} else {
asf->scrambling_b=asf->scrambling_h=asf->scrambling_w=1;
}
mp_msg(MSGT_HEADER,MSGL_V,"ASF: audio scrambling: %d x %d x %d\n",asf->scrambling_h,asf->scrambling_w,asf->scrambling_b);
return 1;
}
static int find_backwards_asf_guid(char *buf, const char *guid, int cur_pos)
{
int i;
for (i=cur_pos-16; i>0; i--) {
if (memcmp(&buf[i], guid, 16) == 0)
return i + 16 + 8; // point after guid + length
}
return -1;
}
int read_asf_header(demuxer_t *demuxer,struct asf_priv* asf){
int hdr_len = asf->header.objh.size - sizeof(asf->header);
int hdr_skip = 0;
char *hdr = NULL;
char guid_buffer[16];
int pos, start = stream_tell(demuxer->stream);
uint32_t* streams = NULL;
int audio_streams=0;
int video_streams=0;
uint16_t stream_count=0;
int best_video = -1;
int best_audio = -1;
uint64_t data_len;
ASF_stream_header_t *streamh;
uint8_t *buffer;
int audio_pos=0;
if(hdr_len < 0) {
mp_msg(MSGT_HEADER, MSGL_FATAL, "Header size is too small.\n");
return 0;
}
if (hdr_len > 1024 * 1024) {
mp_tmsg(MSGT_HEADER, MSGL_ERR, "FATAL: header size bigger than 1 MB (%d)!\nPlease contact MPlayer authors, and upload/send this file.\n",
hdr_len);
hdr_skip = hdr_len - 1024 * 1024;
hdr_len = 1024 * 1024;
}
hdr = malloc(hdr_len);
if (!hdr) {
mp_tmsg(MSGT_HEADER, MSGL_FATAL, "Could not allocate %d bytes for header.\n",
hdr_len);
return 0;
}
stream_read(demuxer->stream, hdr, hdr_len);
if (hdr_skip)
stream_skip(demuxer->stream, hdr_skip);
if (stream_eof(demuxer->stream)) {
mp_tmsg(MSGT_HEADER, MSGL_FATAL, "EOF while reading ASF header, broken/incomplete file?\n");
goto err_out;
}
if (is_drm(hdr, hdr_len))
mp_tmsg(MSGT_HEADER, MSGL_FATAL, "This file has been encumbered with DRM encryption, it will not play in MPlayer!\n");
if ((pos = find_asf_guid(hdr, asf_ext_stream_audio, 0, hdr_len)) >= 0)
{
// Special case: found GUID for dvr-ms audio.
// Now skip back to associated stream header.
int sh_pos=0;
sh_pos = find_backwards_asf_guid(hdr, asf_stream_header_guid, pos);
if (sh_pos > 0) {
sh_audio_t *sh_audio;
mp_msg(MSGT_HEADER, MSGL_V, "read_asf_header found dvr-ms audio stream header pos=%d\n", sh_pos);
// found audio stream header - following code reads header and
// initializes audio stream.
audio_pos = pos - 16 - 8;
streamh = (ASF_stream_header_t *)&hdr[sh_pos];
le2me_ASF_stream_header_t(streamh);
audio_pos += 64; //16+16+4+4+4+16+4;
buffer = &hdr[audio_pos];
sh_audio=new_sh_audio(demuxer,streamh->stream_no & 0x7F);
sh_audio->needs_parsing = 1;
mp_tmsg(MSGT_DEMUX, MSGL_INFO, "[%s] Audio stream found, -aid %d\n", "asfheader", streamh->stream_no & 0x7F);
++audio_streams;
if (!asf_init_audio_stream(demuxer, asf, sh_audio, streamh, &audio_pos, &buffer, hdr, hdr_len))
goto len_err_out;
if (!get_ext_stream_properties(hdr, hdr_len, streamh->stream_no, asf, 0))
goto len_err_out;
}
}
// find stream headers
// only reset pos if we didnt find dvr_ms audio stream
// if we did find it then we want to avoid reading its header twice
if (audio_pos == 0)
pos = 0;
while ((pos = find_asf_guid(hdr, asf_stream_header_guid, pos, hdr_len)) >= 0)
{
streamh = (ASF_stream_header_t *)&hdr[pos];
pos += sizeof(ASF_stream_header_t);
if (pos > hdr_len) goto len_err_out;
le2me_ASF_stream_header_t(streamh);
mp_msg(MSGT_HEADER, MSGL_V, "stream type: %s\n",
asf_chunk_type(streamh->type));
mp_msg(MSGT_HEADER, MSGL_V, "stream concealment: %s\n",
asf_chunk_type(streamh->concealment));
mp_msg(MSGT_HEADER, MSGL_V, "type: %d bytes, stream: %d bytes ID: %d\n",
(int)streamh->type_size, (int)streamh->stream_size,
(int)streamh->stream_no);
mp_msg(MSGT_HEADER, MSGL_V, "unk1: %lX unk2: %X\n",
(unsigned long)streamh->unk1, (unsigned int)streamh->unk2);
mp_msg(MSGT_HEADER, MSGL_V, "FILEPOS=0x%X\n", pos + start);
// type-specific data:
buffer = &hdr[pos];
pos += streamh->type_size;
if (pos > hdr_len) goto len_err_out;
switch(ASF_LOAD_GUID_PREFIX(streamh->type)){
case ASF_GUID_PREFIX_audio_stream: {
sh_audio_t* sh_audio=new_sh_audio(demuxer,streamh->stream_no & 0x7F);
mp_tmsg(MSGT_DEMUX, MSGL_INFO, "[%s] Audio stream found, -aid %d\n", "asfheader", streamh->stream_no & 0x7F);
++audio_streams;
if (!asf_init_audio_stream(demuxer, asf, sh_audio, streamh, &pos, &buffer, hdr, hdr_len))
goto len_err_out;
//if(demuxer->audio->id==-1) demuxer->audio->id=streamh.stream_no & 0x7F;
break;
}
case ASF_GUID_PREFIX_video_stream: {
unsigned int len;
float asp_ratio;
sh_video_t* sh_video=new_sh_video(demuxer,streamh->stream_no & 0x7F);
mp_tmsg(MSGT_DEMUX, MSGL_INFO, "[%s] Video stream found, -vid %d\n", "asfheader", streamh->stream_no & 0x7F);
len=streamh->type_size-(4+4+1+2);
++video_streams;
// sh_video->bih=malloc(chunksize); memset(sh_video->bih,0,chunksize);
sh_video->bih=calloc((len<sizeof(BITMAPINFOHEADER))?sizeof(BITMAPINFOHEADER):len,1);
memcpy(sh_video->bih,&buffer[4+4+1+2],len);
le2me_BITMAPINFOHEADER(sh_video->bih);
if (sh_video->bih->biSize > len && sh_video->bih->biSize > sizeof(BITMAPINFOHEADER))
sh_video->bih->biSize = len;
if (sh_video->bih->biCompression == mmioFOURCC('D', 'V', 'R', ' ')) {
//mp_tmsg(MSGT_DEMUXER, MSGL_WARN, "DVR will probably only work with libavformat, try -demuxer 35 if you have problems\n");
//sh_video->fps=(float)sh_video->video.dwRate/(float)sh_video->video.dwScale;
//sh_video->frametime=(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
asf->asf_frame_state=-1;
asf->asf_frame_start_found=0;
asf->asf_is_dvr_ms=1;
asf->dvr_last_vid_pts=0.0;
} else asf->asf_is_dvr_ms=0;
if (!get_ext_stream_properties(hdr, hdr_len, streamh->stream_no, asf, 1))
goto len_err_out;
if (get_meta(hdr, hdr_len, streamh->stream_no, &asp_ratio)) {
sh_video->aspect = asp_ratio * sh_video->bih->biWidth /
sh_video->bih->biHeight;
}
sh_video->i_bps = asf->bps;
if( mp_msg_test(MSGT_DEMUX,MSGL_V) ) print_video_header(sh_video->bih, MSGL_V);
//asf_video_id=streamh.stream_no & 0x7F;
//if(demuxer->video->id==-1) demuxer->video->id=streamh.stream_no & 0x7F;
break;
}
}
// stream-specific data:
// stream_read(demuxer->stream,(char*) buffer,streamh.stream_size);
}
// find file header
pos = find_asf_guid(hdr, asf_file_header_guid, 0, hdr_len);
if (pos >= 0) {
ASF_file_header_t *fileh = (ASF_file_header_t *)&hdr[pos];
pos += sizeof(ASF_file_header_t);
if (pos > hdr_len) goto len_err_out;
le2me_ASF_file_header_t(fileh);
mp_msg(MSGT_HEADER, MSGL_V, "ASF: packets: %d flags: %d "
"max_packet_size: %d min_packet_size: %d max_bitrate: %d "
"preroll: %d\n",
(int)fileh->num_packets, (int)fileh->flags,
(int)fileh->min_packet_size, (int)fileh->max_packet_size,
(int)fileh->max_bitrate, (int)fileh->preroll);
asf->packetsize=fileh->max_packet_size;
asf->packet=malloc(asf->packetsize); // !!!
asf->packetrate=fileh->max_bitrate/8.0/(double)asf->packetsize;
asf->movielength=(fileh->play_duration-10000*fileh->preroll)/10000000.0;
}
// find content header
pos = find_asf_guid(hdr, asf_content_desc_guid, 0, hdr_len);
if (pos >= 0) {
ASF_content_description_t *contenth = (ASF_content_description_t *)&hdr[pos];
char *string=NULL;
uint16_t* wstring = NULL;
uint16_t len;
pos += sizeof(ASF_content_description_t);
if (pos > hdr_len) goto len_err_out;
le2me_ASF_content_description_t(contenth);
mp_msg(MSGT_HEADER,MSGL_V,"\n");
// extract the title
if((len = contenth->title_size) != 0) {
wstring = (uint16_t*)&hdr[pos];
pos += len;
if (pos > hdr_len) goto len_err_out;
if ((string = get_ucs2str(wstring, len))) {
mp_msg(MSGT_HEADER,MSGL_V," Title: %s\n", string);
demux_info_add(demuxer, "title", string);
free(string);
}
}
// extract the author
if((len = contenth->author_size) != 0) {
wstring = (uint16_t*)&hdr[pos];
pos += len;
if (pos > hdr_len) goto len_err_out;
if ((string = get_ucs2str(wstring, len))) {
mp_msg(MSGT_HEADER,MSGL_V," Author: %s\n", string);
demux_info_add(demuxer, "author", string);
free(string);
}
}
// extract the copyright
if((len = contenth->copyright_size) != 0) {
wstring = (uint16_t*)&hdr[pos];
pos += len;
if (pos > hdr_len) goto len_err_out;
if ((string = get_ucs2str(wstring, len))) {
mp_msg(MSGT_HEADER,MSGL_V," Copyright: %s\n", string);
demux_info_add(demuxer, "copyright", string);
free(string);
}
}
// extract the comment
if((len = contenth->comment_size) != 0) {
wstring = (uint16_t*)&hdr[pos];
pos += len;
if (pos > hdr_len) goto len_err_out;
if ((string = get_ucs2str(wstring, len))) {
mp_msg(MSGT_HEADER,MSGL_V," Comment: %s\n", string);
demux_info_add(demuxer, "comments", string);
free(string);
}
}
// extract the rating
if((len = contenth->rating_size) != 0) {
wstring = (uint16_t*)&hdr[pos];
pos += len;
if (pos > hdr_len) goto len_err_out;
if ((string = get_ucs2str(wstring, len))) {
mp_msg(MSGT_HEADER,MSGL_V," Rating: %s\n", string);
free(string);
}
}
mp_msg(MSGT_HEADER,MSGL_V,"\n");
}
// find content header
pos = find_asf_guid(hdr, asf_stream_group_guid, 0, hdr_len);
if (pos >= 0) {
int max_streams = (hdr_len - pos - 2) / 6;
uint16_t stream_id, i;
uint32_t max_bitrate;
char *ptr = &hdr[pos];
mp_msg(MSGT_HEADER,MSGL_V,"============ ASF Stream group == START ===\n");
if(max_streams <= 0) goto len_err_out;
stream_count = AV_RL16(ptr);
ptr += sizeof(uint16_t);
if(stream_count > max_streams) stream_count = max_streams;
if(stream_count > 0)
streams = malloc(2*stream_count*sizeof(uint32_t));
mp_msg(MSGT_HEADER,MSGL_V," stream count=[0x%x][%u]\n", stream_count, stream_count );
for( i=0 ; i<stream_count ; i++ ) {
stream_id = AV_RL16(ptr);
ptr += sizeof(uint16_t);
max_bitrate = AV_RL32(ptr);
ptr += sizeof(uint32_t);
mp_msg(MSGT_HEADER,MSGL_V," stream id=[0x%x][%u]\n", stream_id, stream_id );
mp_msg(MSGT_HEADER,MSGL_V," max bitrate=[0x%x][%u]\n", max_bitrate, max_bitrate );
streams[2*i] = stream_id;
streams[2*i+1] = max_bitrate;
}
mp_msg(MSGT_HEADER,MSGL_V,"============ ASF Stream group == END ===\n");
}
free(hdr);
hdr = NULL;
start = stream_tell(demuxer->stream); // start of first data chunk
stream_read(demuxer->stream, guid_buffer, 16);
if (memcmp(guid_buffer, asf_data_chunk_guid, 16) != 0) {
mp_tmsg(MSGT_HEADER, MSGL_FATAL, "No data chunk following header!\n");
free(streams);
streams = NULL;
return 0;
}
// read length of chunk
data_len = stream_read_qword_le(demuxer->stream);
demuxer->movi_start = stream_tell(demuxer->stream) + 26;
demuxer->movi_end = start + data_len;
mp_msg(MSGT_HEADER, MSGL_V, "Found movie at 0x%X - 0x%X\n",
(int)demuxer->movi_start, (int)demuxer->movi_end);
if(streams) {
// stream selection is done in the network code, it shouldn't be done here
// as the servers often do not care about what we requested.
#if 0
uint32_t vr = 0, ar = 0,i;
#ifdef CONFIG_NETWORKING
if( demuxer->stream->streaming_ctrl!=NULL ) {
if( demuxer->stream->streaming_ctrl->bandwidth!=0 && demuxer->stream->streaming_ctrl->data!=NULL ) {
best_audio = ((asf_http_streaming_ctrl_t*)demuxer->stream->streaming_ctrl->data)->audio_id;
best_video = ((asf_http_streaming_ctrl_t*)demuxer->stream->streaming_ctrl->data)->video_id;
}
} else
#endif
for(i = 0; i < stream_count; i++) {
uint32_t id = streams[2*i];
uint32_t rate = streams[2*i+1];
if(demuxer->v_streams[id] && rate > vr) {
vr = rate;
best_video = id;
} else if(demuxer->a_streams[id] && rate > ar) {
ar = rate;
best_audio = id;
}
}
#endif
free(streams);
streams = NULL;
}
mp_msg(MSGT_HEADER,MSGL_V,"ASF: %d audio and %d video streams found\n",audio_streams,video_streams);
if(!audio_streams) demuxer->audio->id=-2; // nosound
else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
if(!video_streams){
if(!audio_streams){
mp_tmsg(MSGT_HEADER,MSGL_ERR,"ASF: no audio or video headers found - broken file?\n");
return 0;
}
demuxer->video->id=-2; // audio-only
} else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
#if 0
if( mp_msg_test(MSGT_HEADER,MSGL_V) ){
printf("ASF duration: %d\n",(int)fileh.duration);
printf("ASF start pts: %d\n",(int)fileh.start_timestamp);
printf("ASF end pts: %d\n",(int)fileh.end_timestamp);
}
#endif
return 1;
len_err_out:
mp_tmsg(MSGT_HEADER, MSGL_FATAL, "Invalid length in ASF header!\n");
err_out:
if (hdr) free(hdr);
if (streams) free(streams);
return 0;
}
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