real_rmff.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:19k
源码类别:
midi
开发平台:
Unix_Linux
- /*
- * Copyright (C) 2002-2003 the xine project
- *
- * This file is part of xine, a free video player.
- *
- * xine 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.
- *
- * xine 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 this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- *
- * $Id: 14e4ec4d0df318dcd200f28ecc648588d48b7024 $
- *
- * functions for real media file format
- * adopted from joschkas real tools
- */
- #include "real.h"
- #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
- #define BE_32(x) ((((uint8_t*)(x))[0] << 24) |
- (((uint8_t*)(x))[1] << 16) |
- (((uint8_t*)(x))[2] << 8) |
- ((uint8_t*)(x))[3])
- /*
- * writes header data to a buffer
- */
- static int rmff_dump_fileheader(rmff_fileheader_t *fileheader, uint8_t *buffer, int bufsize) {
- if (!fileheader) return 0;
- if (bufsize < RMFF_FILEHEADER_SIZE)
- return -1;
- fileheader->object_id=BE_32(&fileheader->object_id);
- fileheader->size=BE_32(&fileheader->size);
- fileheader->object_version=BE_16(&fileheader->object_version);
- fileheader->file_version=BE_32(&fileheader->file_version);
- fileheader->num_headers=BE_32(&fileheader->num_headers);
- memcpy(buffer, fileheader, 8);
- memcpy(&buffer[8], &fileheader->object_version, 2);
- memcpy(&buffer[10], &fileheader->file_version, 8);
- fileheader->size=BE_32(&fileheader->size);
- fileheader->object_version=BE_16(&fileheader->object_version);
- fileheader->file_version=BE_32(&fileheader->file_version);
- fileheader->num_headers=BE_32(&fileheader->num_headers);
- fileheader->object_id=BE_32(&fileheader->object_id);
- return RMFF_FILEHEADER_SIZE;
- }
- static int rmff_dump_prop(rmff_prop_t *prop, uint8_t *buffer, int bufsize) {
- if (!prop) return 0;
- if (bufsize < RMFF_PROPHEADER_SIZE)
- return -1;
- prop->object_id=BE_32(&prop->object_id);
- prop->size=BE_32(&prop->size);
- prop->object_version=BE_16(&prop->object_version);
- prop->max_bit_rate=BE_32(&prop->max_bit_rate);
- prop->avg_bit_rate=BE_32(&prop->avg_bit_rate);
- prop->max_packet_size=BE_32(&prop->max_packet_size);
- prop->avg_packet_size=BE_32(&prop->avg_packet_size);
- prop->num_packets=BE_32(&prop->num_packets);
- prop->duration=BE_32(&prop->duration);
- prop->preroll=BE_32(&prop->preroll);
- prop->index_offset=BE_32(&prop->index_offset);
- prop->data_offset=BE_32(&prop->data_offset);
- prop->num_streams=BE_16(&prop->num_streams);
- prop->flags=BE_16(&prop->flags);
- memcpy(buffer, prop, 8);
- memcpy(&buffer[8], &prop->object_version, 2);
- memcpy(&buffer[10], &prop->max_bit_rate, 36);
- memcpy(&buffer[46], &prop->num_streams, 2);
- memcpy(&buffer[48], &prop->flags, 2);
- prop->size=BE_32(&prop->size);
- prop->object_version=BE_16(&prop->object_version);
- prop->max_bit_rate=BE_32(&prop->max_bit_rate);
- prop->avg_bit_rate=BE_32(&prop->avg_bit_rate);
- prop->max_packet_size=BE_32(&prop->max_packet_size);
- prop->avg_packet_size=BE_32(&prop->avg_packet_size);
- prop->num_packets=BE_32(&prop->num_packets);
- prop->duration=BE_32(&prop->duration);
- prop->preroll=BE_32(&prop->preroll);
- prop->index_offset=BE_32(&prop->index_offset);
- prop->data_offset=BE_32(&prop->data_offset);
- prop->num_streams=BE_16(&prop->num_streams);
- prop->flags=BE_16(&prop->flags);
- prop->object_id=BE_32(&prop->object_id);
- return RMFF_PROPHEADER_SIZE;
- }
- static int rmff_dump_mdpr(rmff_mdpr_t *mdpr, uint8_t *buffer, unsigned int bufsize) {
- int s1, s2, s3;
- if (!mdpr) return 0;
- if (bufsize < RMFF_MDPRHEADER_SIZE + mdpr->type_specific_len +
- mdpr->stream_name_size + mdpr->mime_type_size)
- return -1;
- mdpr->object_id=BE_32(&mdpr->object_id);
- mdpr->size=BE_32(&mdpr->size);
- mdpr->object_version=BE_16(&mdpr->object_version);
- mdpr->stream_number=BE_16(&mdpr->stream_number);
- mdpr->max_bit_rate=BE_32(&mdpr->max_bit_rate);
- mdpr->avg_bit_rate=BE_32(&mdpr->avg_bit_rate);
- mdpr->max_packet_size=BE_32(&mdpr->max_packet_size);
- mdpr->avg_packet_size=BE_32(&mdpr->avg_packet_size);
- mdpr->start_time=BE_32(&mdpr->start_time);
- mdpr->preroll=BE_32(&mdpr->preroll);
- mdpr->duration=BE_32(&mdpr->duration);
- memcpy(buffer, mdpr, 8);
- memcpy(&buffer[8], &mdpr->object_version, 2);
- memcpy(&buffer[10], &mdpr->stream_number, 2);
- memcpy(&buffer[12], &mdpr->max_bit_rate, 28);
- memcpy(&buffer[40], &mdpr->stream_name_size, 1);
- s1=mdpr->stream_name_size;
- memcpy(&buffer[41], mdpr->stream_name, s1);
- memcpy(&buffer[41+s1], &mdpr->mime_type_size, 1);
- s2=mdpr->mime_type_size;
- memcpy(&buffer[42+s1], mdpr->mime_type, s2);
- mdpr->type_specific_len=BE_32(&mdpr->type_specific_len);
- memcpy(&buffer[42+s1+s2], &mdpr->type_specific_len, 4);
- mdpr->type_specific_len=BE_32(&mdpr->type_specific_len);
- s3=mdpr->type_specific_len;
- memcpy(&buffer[46+s1+s2], mdpr->type_specific_data, s3);
- mdpr->size=BE_32(&mdpr->size);
- mdpr->stream_number=BE_16(&mdpr->stream_number);
- mdpr->max_bit_rate=BE_32(&mdpr->max_bit_rate);
- mdpr->avg_bit_rate=BE_32(&mdpr->avg_bit_rate);
- mdpr->max_packet_size=BE_32(&mdpr->max_packet_size);
- mdpr->avg_packet_size=BE_32(&mdpr->avg_packet_size);
- mdpr->start_time=BE_32(&mdpr->start_time);
- mdpr->preroll=BE_32(&mdpr->preroll);
- mdpr->duration=BE_32(&mdpr->duration);
- mdpr->object_id=BE_32(&mdpr->object_id);
- return RMFF_MDPRHEADER_SIZE + s1 + s2 + s3;
- }
- static int rmff_dump_cont(rmff_cont_t *cont, uint8_t *buffer, int bufsize) {
- int p;
- if (!cont) return 0;
- if (bufsize < RMFF_CONTHEADER_SIZE + cont->title_len + cont->author_len +
- cont->copyright_len + cont->comment_len)
- return -1;
- cont->object_id=BE_32(&cont->object_id);
- cont->size=BE_32(&cont->size);
- cont->object_version=BE_16(&cont->object_version);
- memcpy(buffer, cont, 8);
- memcpy(&buffer[8], &cont->object_version, 2);
- cont->title_len=BE_16(&cont->title_len);
- memcpy(&buffer[10], &cont->title_len, 2);
- cont->title_len=BE_16(&cont->title_len);
- memcpy(&buffer[12], cont->title, cont->title_len);
- p=12+cont->title_len;
- cont->author_len=BE_16(&cont->author_len);
- memcpy(&buffer[p], &cont->author_len, 2);
- cont->author_len=BE_16(&cont->author_len);
- memcpy(&buffer[p+2], cont->author, cont->author_len);
- p+=2+cont->author_len;
- cont->copyright_len=BE_16(&cont->copyright_len);
- memcpy(&buffer[p], &cont->copyright_len, 2);
- cont->copyright_len=BE_16(&cont->copyright_len);
- memcpy(&buffer[p+2], cont->copyright, cont->copyright_len);
- p+=2+cont->copyright_len;
- cont->comment_len=BE_16(&cont->comment_len);
- memcpy(&buffer[p], &cont->comment_len, 2);
- cont->comment_len=BE_16(&cont->comment_len);
- memcpy(&buffer[p+2], cont->comment, cont->comment_len);
- cont->size=BE_32(&cont->size);
- cont->object_version=BE_16(&cont->object_version);
- cont->object_id=BE_32(&cont->object_id);
- return RMFF_CONTHEADER_SIZE + cont->title_len + cont->author_len +
- cont->copyright_len + cont->comment_len;
- }
- static int rmff_dump_dataheader(rmff_data_t *data, uint8_t *buffer, int bufsize) {
- if (!data) return 0;
- if (bufsize < RMFF_DATAHEADER_SIZE)
- return -1;
- data->object_id=BE_32(&data->object_id);
- data->size=BE_32(&data->size);
- data->object_version=BE_16(&data->object_version);
- data->num_packets=BE_32(&data->num_packets);
- data->next_data_header=BE_32(&data->next_data_header);
- memcpy(buffer, data, 8);
- memcpy(&buffer[8], &data->object_version, 2);
- memcpy(&buffer[10], &data->num_packets, 8);
- data->num_packets=BE_32(&data->num_packets);
- data->next_data_header=BE_32(&data->next_data_header);
- data->size=BE_32(&data->size);
- data->object_version=BE_16(&data->object_version);
- data->object_id=BE_32(&data->object_id);
- return RMFF_DATAHEADER_SIZE;
- }
- int rmff_dump_header(rmff_header_t *h, void *buf_gen, int max) {
- uint8_t *buffer = buf_gen;
- int written=0, size;
- rmff_mdpr_t **stream=h->streams;
- if ((size=rmff_dump_fileheader(h->fileheader, &buffer[written], max)) < 0)
- return -1;
- written += size;
- max -= size;
- if ((size=rmff_dump_prop(h->prop, &buffer[written], max)) < 0)
- return -1;
- written += size;
- max -= size;
- if ((size=rmff_dump_cont(h->cont, &buffer[written], max)) < 0)
- return -1;
- written += size;
- max -= size;
- if (stream) {
- while(*stream) {
- if ((size=rmff_dump_mdpr(*stream, &buffer[written], max)) < 0)
- return -1;
- written += size;
- max -= size;
- stream++;
- }
- }
- if ((size=rmff_dump_dataheader(h->data, &buffer[written], max)) < 0)
- return -1;
- written+=size;
- return written;
- }
- void rmff_dump_pheader(rmff_pheader_t *h, char *data) {
- data[0]=(h->object_version>>8) & 0xff;
- data[1]=h->object_version & 0xff;
- data[2]=(h->length>>8) & 0xff;
- data[3]=h->length & 0xff;
- data[4]=(h->stream_number>>8) & 0xff;
- data[5]=h->stream_number & 0xff;
- data[6]=(h->timestamp>>24) & 0xff;
- data[7]=(h->timestamp>>16) & 0xff;
- data[8]=(h->timestamp>>8) & 0xff;
- data[9]=h->timestamp & 0xff;
- data[10]=h->reserved;
- data[11]=h->flags;
- }
- rmff_fileheader_t *rmff_new_fileheader(uint32_t num_headers) {
- rmff_fileheader_t *fileheader = calloc( 1, sizeof(rmff_fileheader_t) );
- if( !fileheader )
- return NULL;
- fileheader->object_id=RMF_TAG;
- fileheader->size=18;
- fileheader->object_version=0;
- fileheader->file_version=0;
- fileheader->num_headers=num_headers;
- return fileheader;
- }
- rmff_prop_t *rmff_new_prop (
- uint32_t max_bit_rate,
- uint32_t avg_bit_rate,
- uint32_t max_packet_size,
- uint32_t avg_packet_size,
- uint32_t num_packets,
- uint32_t duration,
- uint32_t preroll,
- uint32_t index_offset,
- uint32_t data_offset,
- uint16_t num_streams,
- uint16_t flags ) {
- rmff_prop_t *prop = calloc( 1, sizeof(rmff_prop_t) );
- if( !prop )
- return NULL;
- prop->object_id=PROP_TAG;
- prop->size=50;
- prop->object_version=0;
- prop->max_bit_rate=max_bit_rate;
- prop->avg_bit_rate=avg_bit_rate;
- prop->max_packet_size=max_packet_size;
- prop->avg_packet_size=avg_packet_size;
- prop->num_packets=num_packets;
- prop->duration=duration;
- prop->preroll=preroll;
- prop->index_offset=index_offset;
- prop->data_offset=data_offset;
- prop->num_streams=num_streams;
- prop->flags=flags;
- return prop;
- }
- rmff_mdpr_t *rmff_new_mdpr(
- uint16_t stream_number,
- uint32_t max_bit_rate,
- uint32_t avg_bit_rate,
- uint32_t max_packet_size,
- uint32_t avg_packet_size,
- uint32_t start_time,
- uint32_t preroll,
- uint32_t duration,
- const char *stream_name,
- const char *mime_type,
- uint32_t type_specific_len,
- const char *type_specific_data ) {
- rmff_mdpr_t *mdpr = calloc( 1, sizeof(rmff_mdpr_t) );
- if( !mdpr )
- return NULL;
- mdpr->object_id=MDPR_TAG;
- mdpr->object_version=0;
- mdpr->stream_number=stream_number;
- mdpr->max_bit_rate=max_bit_rate;
- mdpr->avg_bit_rate=avg_bit_rate;
- mdpr->max_packet_size=max_packet_size;
- mdpr->avg_packet_size=avg_packet_size;
- mdpr->start_time=start_time;
- mdpr->preroll=preroll;
- mdpr->duration=duration;
- mdpr->stream_name_size=0;
- if (stream_name) {
- mdpr->stream_name=strdup(stream_name);
- mdpr->stream_name_size=strlen(stream_name);
- }
- mdpr->mime_type_size=0;
- if (mime_type) {
- mdpr->mime_type=strdup(mime_type);
- mdpr->mime_type_size=strlen(mime_type);
- }
- mdpr->type_specific_len=type_specific_len;
- mdpr->type_specific_data = malloc(type_specific_len);
- if( !mdpr->type_specific_data ) {
- free( mdpr->stream_name );
- free( mdpr );
- return NULL;
- }
- memcpy(mdpr->type_specific_data,type_specific_data,type_specific_len);
- mdpr->mlti_data=NULL;
- mdpr->size=mdpr->stream_name_size+mdpr->mime_type_size+mdpr->type_specific_len+46;
- return mdpr;
- }
- rmff_cont_t *rmff_new_cont(const char *title, const char *author, const char *copyright, const char *comment) {
- rmff_cont_t *cont = calloc( 1, sizeof(rmff_cont_t) );
- if( !cont )
- return NULL;
- cont->object_id=CONT_TAG;
- cont->object_version=0;
- cont->title=NULL;
- cont->author=NULL;
- cont->copyright=NULL;
- cont->comment=NULL;
- cont->title_len=0;
- cont->author_len=0;
- cont->copyright_len=0;
- cont->comment_len=0;
- if (title) {
- cont->title_len=strlen(title);
- cont->title=strdup(title);
- }
- if (author)
- {
- cont->author_len=strlen(author);
- cont->author=strdup(author);
- }
- if (copyright) {
- cont->copyright_len=strlen(copyright);
- cont->copyright=strdup(copyright);
- }
- if (comment) {
- cont->comment_len=strlen(comment);
- cont->comment=strdup(comment);
- }
- cont->size=cont->title_len+cont->author_len+cont->copyright_len+cont->comment_len+18;
- return cont;
- }
- rmff_data_t *rmff_new_dataheader(uint32_t num_packets, uint32_t next_data_header) {
- rmff_data_t *data = calloc( 1, sizeof(rmff_data_t) );
- if( !data )
- return NULL;
- data->object_id=DATA_TAG;
- data->size=18;
- data->object_version=0;
- data->num_packets=num_packets;
- data->next_data_header=next_data_header;
- return data;
- }
- void rmff_print_header(rmff_header_t *h) {
- rmff_mdpr_t **stream;
- if(!h) {
- printf("rmff_print_header: NULL givenn");
- return;
- }
- if(h->fileheader)
- {
- printf("nFILE:n");
- printf("file version : %dn", h->fileheader->file_version);
- printf("number of headers : %dn", h->fileheader->num_headers);
- }
- if(h->cont)
- {
- printf("nCONTENT:n");
- printf("title : %sn", h->cont->title);
- printf("author : %sn", h->cont->author);
- printf("copyright : %sn", h->cont->copyright);
- printf("comment : %sn", h->cont->comment);
- }
- if(h->prop)
- {
- printf("nSTREAM PROPERTIES:n");
- printf("bit rate (max/avg) : %i/%in", h->prop->max_bit_rate, h->prop->avg_bit_rate);
- printf("packet size (max/avg) : %i/%i bytesn", h->prop->max_packet_size, h->prop->avg_packet_size);
- printf("packets : %in", h->prop->num_packets);
- printf("duration : %i msn", h->prop->duration);
- printf("pre-buffer : %i msn", h->prop->preroll);
- printf("index offset : %i bytesn", h->prop->index_offset);
- printf("data offset : %i bytesn", h->prop->data_offset);
- printf("media streams : %in", h->prop->num_streams);
- printf("flags : ");
- if (h->prop->flags & PN_SAVE_ENABLED) printf("save_enabled ");
- if (h->prop->flags & PN_PERFECT_PLAY_ENABLED) printf("perfect_play_enabled ");
- if (h->prop->flags & PN_LIVE_BROADCAST) printf("live_broadcast ");
- printf("n");
- }
- stream=h->streams;
- if(stream)
- {
- while (*stream)
- {
- printf("nSTREAM %i:n", (*stream)->stream_number);
- printf("stream name [mime type] : %s [%s]n", (*stream)->stream_name, (*stream)->mime_type);
- printf("bit rate (max/avg) : %i/%in", (*stream)->max_bit_rate, (*stream)->avg_bit_rate);
- printf("packet size (max/avg) : %i/%i bytesn", (*stream)->max_packet_size, (*stream)->avg_packet_size);
- printf("start time : %in", (*stream)->start_time);
- printf("pre-buffer : %i msn", (*stream)->preroll);
- printf("duration : %i msn", (*stream)->duration);
- printf("type specific data:n");
- stream++;
- }
- }
- if(h->data)
- {
- printf("nDATA:n");
- printf("size : %in", h->data->size);
- printf("packets : %in", h->data->num_packets);
- printf("next DATA : 0x%08xn", h->data->next_data_header);
- }
- }
- void rmff_fix_header(rmff_header_t *h) {
- unsigned int num_headers=0;
- unsigned int header_size=0;
- rmff_mdpr_t **streams;
- int num_streams=0;
- if (!h) {
- lprintf("rmff_fix_header: fatal: no header given.n");
- return;
- }
- if (!h->streams) {
- lprintf("rmff_fix_header: warning: no MDPR chunksn");
- } else
- {
- streams=h->streams;
- while (*streams)
- {
- num_streams++;
- num_headers++;
- header_size+=(*streams)->size;
- streams++;
- }
- }
- if (h->prop) {
- if (h->prop->size != 50)
- {
- lprintf("rmff_fix_header: correcting prop.size from %i to %in", h->prop->size, 50);
- h->prop->size=50;
- }
- if (h->prop->num_streams != num_streams)
- {
- lprintf("rmff_fix_header: correcting prop.num_streams from %i to %in", h->prop->num_streams, num_streams);
- h->prop->num_streams=num_streams;
- }
- num_headers++;
- header_size+=50;
- } else
- lprintf("rmff_fix_header: warning: no PROP chunk.n");
- if (h->cont) {
- num_headers++;
- header_size+=h->cont->size;
- } else
- lprintf("rmff_fix_header: warning: no CONT chunk.n");
- if (!h->data) {
- lprintf("rmff_fix_header: no DATA chunk, creating onen");
- h->data = calloc( 1, sizeof(rmff_data_t) );
- if( h->data )
- {
- h->data->object_id=DATA_TAG;
- h->data->object_version=0;
- h->data->size=18;
- h->data->num_packets=0;
- h->data->next_data_header=0;
- }
- }
- num_headers++;
- if (!h->fileheader) {
- lprintf("rmff_fix_header: no fileheader, creating one");
- h->fileheader = calloc( 1, sizeof(rmff_fileheader_t) );
- if( h->fileheader )
- {
- h->fileheader->object_id=RMF_TAG;
- h->fileheader->size=18;
- h->fileheader->object_version=0;
- h->fileheader->file_version=0;
- h->fileheader->num_headers=num_headers+1;
- }
- }
- header_size+=h->fileheader->size;
- num_headers++;
- if(h->fileheader->num_headers != num_headers) {
- lprintf("rmff_fix_header: setting num_headers from %i to %in", h->fileheader->num_headers, num_headers);
- h->fileheader->num_headers=num_headers;
- }
- if(h->prop) {
- if (h->prop->data_offset != header_size) {
- lprintf("rmff_fix_header: setting prop.data_offset from %i to %in", h->prop->data_offset, header_size);
- h->prop->data_offset=header_size;
- }
- /* FIXME: I doubt this is right to do this here.
- * It should belong to the demux. */
- if (h->prop->num_packets == 0) {
- int p=(int)(h->prop->avg_bit_rate/8.0*(h->prop->duration/1000.0)/h->prop->avg_packet_size);
- lprintf("rmff_fix_header: assuming prop.num_packets=%in", p);
- h->prop->num_packets=p;
- }
- if (h->data->num_packets == 0) {
- lprintf("rmff_fix_header: assuming data.num_packets=%in", h->prop->num_packets);
- h->data->num_packets=h->prop->num_packets;
- }
- if (h->data->size == 18 || !h->data->size ) {
- lprintf("rmff_fix_header: assuming data.size=%in", h->prop->num_packets*h->prop->avg_packet_size);
- h->data->size+=h->prop->num_packets*h->prop->avg_packet_size;
- }
- }
- }
- int rmff_get_header_size(rmff_header_t *h) {
- if (!h) return 0;
- if (!h->prop) return -1;
- return h->prop->data_offset+18;
- }
- void rmff_free_header(rmff_header_t *h)
- {
- if (!h) return;
- free( h->fileheader );
- free( h->prop );
- free( h->data );
- if( h->cont ) {
- free( h->cont->title );
- free( h->cont->author );
- free( h->cont->copyright );
- free( h->cont->comment );
- free( h->cont );
- }
- if (h->streams)
- {
- rmff_mdpr_t **s=h->streams;
- while(*s) {
- free((*s)->stream_name);
- free((*s)->mime_type);
- free((*s)->type_specific_data);
- free(*s);
- s++;
- }
- free(h->streams);
- }
- free(h);
- }