void
initlog(int dev)
{
if (sizeof(struct logheader) >= BSIZE)
panic("initlog: too big logheader");
struct superblock sb;
initlock(&log.lock, "log");
readsb(dev, &sb);
log.start = sb.logstart;
log.size = sb.nlog;
log.dev = dev;
recover_from_log();
}
void
initlog(void)
{
if (sizeof(struct logheader) >= BSIZE)
panic("initlog: too big logheader");
struct superblock sb;
initlock(&log.lock, "log");
readsb(ROOTDEV, &sb);
log.start = sb.size - sb.nlog;
log.size = sb.nlog;
log.dev = ROOTDEV;
recover_from_log();
}
int init_seg_union(Segment_U * segment_union ,int prog_no) { //传递是指针变量的地址
Segment_U * seg_union =segment_union;
seg_union->segment_no = 0;
seg_union->picture_capture = avcodec_alloc_frame();
seg_union->picture_capture_no = 0;
/* -----------base seg_union do something--------------- */
// create directory
create_directory(seg_union->storage_dir);
// create m3u8 file
create_m3u8_name(seg_union);
chris_printf("seg_union->full_m3u8_name = %s \n" ,seg_union->full_m3u8_name);
/*----------following ,start to set Output_Context information----- */
//malloc Output_context
if( (seg_union->output_ctx = malloc (sizeof(Output_Context))) == NULL){
fprintf(stderr ,"ptr_output_ctx malloc failed .\n");
exit(MEMORY_MALLOC_FAIL);
}
//segment element in output context
seg_union->output_ctx->frame_rate = seg_union->frame_rate; //frame rate
seg_union->output_ctx->width = seg_union->width; //video width
seg_union->output_ctx->height = seg_union->height; //video height
seg_union->output_ctx->video_rate = seg_union->video_rate; //video bitrate
seg_union->output_ctx->audio_rate = seg_union->audio_rate; //audio bitrate
seg_union->output_ctx->sample = seg_union->sample; //audio sample
seg_union->output_ctx->channel = seg_union->channel; //audio channels
seg_union->output_ctx->num_in_dir = seg_union->num_in_dir;
seg_union->output_ctx->num_in_m3u8 = seg_union->num_in_m3u8;
seg_union->output_ctx->segment_duration = seg_union->segment_duration;
seg_union->output_ctx->ts_prfix_name = seg_union->ts_prfix_name;
seg_union->output_ctx->mode_type = seg_union->mode_type;
//
seg_union->output_ctx->segment_no = seg_union->segment_no;
seg_union->output_ctx->full_m3u8_name = seg_union->full_m3u8_name;
seg_union->output_ctx->m3u8 = seg_union->m3u8_name;
//
seg_union->output_ctx->frame_count = 0; //this frame_count be used to generate video pts.
chris_printf("num_in_m3u8 = %d ,num_in_dir = %d \n\n" ,seg_union->output_ctx->num_in_m3u8 ,seg_union->output_ctx->num_in_dir);
/*----------- following ,only do in the mode_type yy_live --------------*/
if(seg_union->mode_type == YY_LIVE){ // live mode
/* live something */
//malloc live_buffer for m3u8 buffer //the content of m3u8
seg_union->output_ctx->live_write_buf = malloc(sizeof(char) * 1024 * 100);
if (!seg_union->output_ctx->live_write_buf) {
fprintf(stderr, "Could not allocate write buffer for live_write_buf\n");
exit(ALLOCATE_M3U8_WRITE_BUFFER_LIVE);
}
memset(seg_union->output_ctx->live_write_buf ,0 ,1024*100);
chris_printf("ptr_output_ctx->num_in_m3u8 = %d \n" ,seg_union->output_ctx->num_in_m3u8);
seg_union->output_ctx->seg_duration_arr = malloc(sizeof(double) * ( seg_union->output_ctx->num_in_m3u8 + 1) ); //use to storage the every ts file length in the m3u8 ,the array[0] reserved
if(seg_union->output_ctx->seg_duration_arr == NULL){
fprintf(stderr ,"seg_duration_arr malloc failed .. ,%s ,line %d \n" ,__FILE__ ,__LINE__);
exit(MEMORY_MALLOC_FAIL);
}
/* judge for the log.info */
int ret =find_log_file(seg_union);
if(ret){//find the log file ,and recover the scene ,recover the segment_no use to create the ts name
recover_from_log(seg_union);
chris_printf("......after recover from the log file ...\n\n\n");
}
}
//splice the first ts name
create_first_ts_name(seg_union ,seg_union->mode_type);
//the followint ,dir_name_len and ts_name set must be set after the function create_first_ts_name!!!!
seg_union->output_ctx->dir_name_len = seg_union->dir_name_len; //
seg_union->output_ctx->ts_name = seg_union->ts_name; //
chris_printf("--------------->before transcode init function ,seg_union->ts_name = %s..\n" ,seg_union->ts_name);
//add audio stream and video into the output_ctx ,of course ,set codec information also in the function init_output
// init_output(seg_union->output_ctx ,seg_union->ts_name ); //add stream information in this function
init_output(seg_union->output_ctx ,seg_union->ts_name , prog_no); //add stream information in this function
//open video and audio codecs ,set video_out_buf and audio_out_buf
open_stream_codec(seg_union->output_ctx ,prog_no);
chris_printf("--------------->after transcode init function ..\n");
return 0;
}