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Patch from John Donaghy: "fix for audio and video in dvr-ms asf files"

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18610 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
pacman 2006-06-06 23:34:21 +00:00
parent 36e4ad3058
commit 2a8494d031
3 changed files with 198 additions and 33 deletions
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3
libmpdemux/asf.h
View File

@ -222,6 +222,9 @@ struct asf_priv {
unsigned packetsize;
double packetrate;
unsigned movielength;
int asf_is_dvr_ms;
uint32_t asf_frame_state;
int asf_frame_start_found;
};
#endif

115
libmpdemux/asfheader.c
View File

@ -34,6 +34,8 @@
#define ASF_GUID_PREFIX_file_header 0x8CABDCA1
#define ASF_GUID_PREFIX_content_desc 0x75b22633
#define ASF_GUID_PREFIX_stream_group 0x7bf875ce
#define ASF_GUID_PREFIX_ext_audio_stream 0x31178C9D
#define ASF_GUID_PREFIX_ext_stream_embed_stream_header 0x3AFB65E2
/*
const char asf_audio_stream_guid[16] = {0x40, 0x9e, 0x69, 0xf8,
@ -51,6 +53,12 @@ const char asf_stream_group_guid[16] = {0xce, 0x75, 0xf8, 0x7b,
0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2};
const char asf_data_chunk_guid[16] = {0x36, 0x26, 0xb2, 0x75,
0x8e, 0x66, 0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c};
const char asf_ext_stream_embed_stream_header[16] = {0xe2, 0x65, 0xfb, 0x3a,
0xef, 0x47, 0xf2, 0x40, 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43};
const char asf_ext_stream_audio[16] = {0x9d, 0x8c, 0x17, 0x31,
0xe1, 0x03, 0x28, 0x45, 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03};
const char asf_ext_stream_header[16] = {0xCB, 0xA5, 0xE6, 0x14,
0x72, 0xC6, 0x32, 0x43, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A};
// the variable string is modify in this function
@ -77,6 +85,10 @@ static char* asf_chunk_type(unsigned char* guid) {
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:
@ -144,6 +156,42 @@ int find_asf_guid(char *buf, const char *guid, int cur_pos, int buf_len)
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;
}
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;
}
int read_asf_header(demuxer_t *demuxer,struct asf_priv* asf){
int hdr_len = asf->header.objh.size - sizeof(asf->header);
char *hdr = NULL;
@ -156,6 +204,9 @@ int read_asf_header(demuxer_t *demuxer,struct asf_priv* asf){
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");
@ -179,12 +230,38 @@ int read_asf_header(demuxer_t *demuxer,struct asf_priv* asf){
goto err_out;
}
if ((pos = find_asf_guid(hdr, asf_ext_stream_audio, pos, 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) {
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_t* sh_audio=new_sh_audio(demuxer,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;
}
}
// find stream headers
pos = 0;
// 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)
{
ASF_stream_header_t *streamh = (ASF_stream_header_t *)&hdr[pos];
uint8_t *buffer;
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);
@ -206,24 +283,8 @@ int read_asf_header(demuxer_t *demuxer,struct asf_priv* asf){
case ASF_GUID_PREFIX_audio_stream: {
sh_audio_t* sh_audio=new_sh_audio(demuxer,streamh->stream_no & 0x7F);
++audio_streams;
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) goto len_err_out;
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);
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;
}
@ -235,10 +296,14 @@ int read_asf_header(demuxer_t *demuxer,struct asf_priv* asf){
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->biCompression == mmioFOURCC('D', 'V', 'R', ' '))
mp_msg(MSGT_DEMUXER, MSGL_WARN, MSGTR_MPDEMUX_ASFHDR_DVRWantsLibavformat);
//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;
if (sh_video->bih->biCompression == mmioFOURCC('D', 'V', 'R', ' ')) {
//mp_msg(MSGT_DEMUXER, MSGL_WARN, MSGTR_MPDEMUX_ASFHDR_DVRWantsLibavformat);
//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;
} else asf->asf_is_dvr_ms=0;
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;

113
libmpdemux/demux_asf.c
View File

@ -14,6 +14,11 @@
#include "libvo/fastmemcpy.h"
#define ASFMIN(a,b) ((a) > (b) ? (b) : (a))
#define SLICE_MIN_START_CODE 0x00000101
#define SLICE_MAX_START_CODE 0x000001af
#define END_NOT_FOUND -100
/*
* Load 16/32-bit values in little endian byte order
* from an unaligned address
@ -21,6 +26,10 @@
#ifdef ARCH_X86
#define LOAD_LE32(p) (*(unsigned int*)(p))
#define LOAD_LE16(p) (*(unsigned short*)(p))
#define LOAD_BE32(p) (((unsigned char*)(p))[3] | \
((unsigned char*)(p))[2]<< 8 | \
((unsigned char*)(p))[1]<<16 | \
((unsigned char*)(p))[0]<<24 )
#else
#define LOAD_LE32(p) (((unsigned char*)(p))[0] | \
((unsigned char*)(p))[1]<< 8 | \
@ -28,6 +37,7 @@
((unsigned char*)(p))[3]<<24 )
#define LOAD_LE16(p) (((unsigned char*)(p))[0] | \
((unsigned char*)(p))[1]<<8)
#define LOAD_BE32(p) (*(unsigned int*)(p))
#endif
// defined at asfheader.c:
@ -64,9 +74,86 @@ static void asf_descrambling(unsigned char **src,unsigned len, struct asf_priv*
#define FF_INPUT_BUFFER_PADDING_SIZE 8
#endif
static const uint8_t *find_start_code(const uint8_t * restrict p, const uint8_t *end, uint32_t * restrict state){
int i;
if(p>=end)
return end;
for(i=0; i<3; i++){
uint32_t tmp= *state << 8;
*state= tmp + *(p++);
if(tmp == 0x100 || p==end)
return p;
}
while(p<end){
if (p[-1] > 1 ) p+= 3;
else if(p[-2] ) p+= 2;
else if(p[-3]|(p[-1]-1)) p++;
else{
p++;
break;
}
}
p= ASFMIN(p, end)-4;
*state= LOAD_BE32(p);
return p+4;
}
static int mpeg1_find_frame_end(demuxer_t *demux, const uint8_t *buf, int buf_size)
{
int i;
struct asf_priv* asf = demux->priv;
i=0;
if(!asf->asf_frame_start_found){
for(i=0; i<buf_size; i++){
i= find_start_code(buf+i, buf+buf_size, &asf->asf_frame_state) - buf - 1;
if(asf->asf_frame_state >= SLICE_MIN_START_CODE && asf->asf_frame_state <= SLICE_MAX_START_CODE){
i++;
asf->asf_frame_start_found=1;
break;
}
}
}
if(asf->asf_frame_start_found){
/* EOF considered as end of frame */
if (buf_size == 0)
return 0;
for(; i<buf_size; i++){
i= find_start_code(buf+i, buf+buf_size, &asf->asf_frame_state) - buf - 1;
if((asf->asf_frame_state&0xFFFFFF00) == 0x100){
//if NOT in range 257 - 431
if(asf->asf_frame_state < SLICE_MIN_START_CODE || asf->asf_frame_state > SLICE_MAX_START_CODE){
asf->asf_frame_start_found=0;
asf->asf_frame_state=-1;
return i-3;
}
}
}
}
return END_NOT_FOUND;
}
static void demux_asf_append_to_packet(demux_packet_t* dp,unsigned char *data,int len,int offs)
{
if(dp->len!=offs && offs!=-1) mp_msg(MSGT_DEMUX,MSGL_V,"warning! fragment.len=%d BUT next fragment offset=%d \n",dp->len,offs);
dp->buffer=realloc(dp->buffer,dp->len+len+FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(dp->buffer+dp->len,data,len);
memset(dp->buffer+dp->len+len, 0, FF_INPUT_BUFFER_PADDING_SIZE);
mp_dbg(MSGT_DEMUX,MSGL_DBG4,"data appended! %d+%d\n",dp->len,len);
dp->len+=len;
}
static int demux_asf_read_packet(demuxer_t *demux,unsigned char *data,int len,int id,int seq,unsigned long time,unsigned short dur,int offs,int keyframe){
struct asf_priv* asf = demux->priv;
demux_stream_t *ds=NULL;
int close_seg=0;
int frame_end_pos=END_NOT_FOUND;
mp_dbg(MSGT_DEMUX,MSGL_DBG4,"demux_asf.read_packet: id=%d seq=%d len=%d\n",id,seq,len);
@ -97,7 +184,23 @@ static int demux_asf_read_packet(demuxer_t *demux,unsigned char *data,int len,in
if(ds){
if(ds->asf_packet){
if(ds->asf_seq!=seq){
demux_packet_t* dp=ds->asf_packet;
if (ds==demux->video && asf->asf_is_dvr_ms) {
frame_end_pos=mpeg1_find_frame_end(demux, data, len);
if (frame_end_pos != END_NOT_FOUND) {
dp->pos=demux->filepos;
if (frame_end_pos > 0) {
demux_asf_append_to_packet(dp,data,frame_end_pos,offs);
data += frame_end_pos;
len -= frame_end_pos;
}
close_seg = 1;
} else seq = ds->asf_seq;
} else close_seg = ds->asf_seq!=seq;
if(close_seg){
// closed segment, finalize packet:
if(ds==demux->audio)
if(asf->scrambling_h>1 && asf->scrambling_w>1 && asf->scrambling_b>0)
@ -106,13 +209,7 @@ static int demux_asf_read_packet(demuxer_t *demux,unsigned char *data,int len,in
ds->asf_packet=NULL;
} else {
// append data to it!
demux_packet_t* dp=ds->asf_packet;
if(dp->len!=offs && offs!=-1) mp_msg(MSGT_DEMUX,MSGL_V,"warning! fragment.len=%d BUT next fragment offset=%d \n",dp->len,offs);
dp->buffer=realloc(dp->buffer,dp->len+len+FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(dp->buffer+dp->len,data,len);
memset(dp->buffer+dp->len+len, 0, FF_INPUT_BUFFER_PADDING_SIZE);
mp_dbg(MSGT_DEMUX,MSGL_DBG4,"data appended! %d+%d\n",dp->len,len);
dp->len+=len;
demux_asf_append_to_packet(dp,data,len,offs);
// we are ready now.
return 1;
}