发布时间 : 星期一 文章h264转avi,编译通过源码更新完毕开始阅读12128e4033687e21af45a960
cfg->psz_fin = NULL; cfg->psz_fout = NULL; cfg->f_fps = 25.0;
memcpy( cfg->fcc, \
/* Parse command line options */ opterr = 0; // no error message for( ;; ) {
int long_options_index;
static struct option long_options[] = {
{ \ no_argument, NULL, 'h' }, { \ required_argument, NULL, 'i' }, { \ { \ required_argument, NULL, 'f' }, { \ required_argument, NULL, 'c' }, {0, 0, 0, 0} };
int c;
c = getopt_long( argc, argv, \
long_options, &long_options_index);
if( c == -1 ) {
break; }
switch( c ) {
case 'h': Help(); return -1;
case 0: break; case 'i':
cfg->psz_fin = strdup( optarg ); break; case 'o':
cfg->psz_fout = strdup( optarg ); break;
case 'f':
cfg->f_fps = atof( optarg ); break; case 'c':
memset( cfg->fcc, ' ', 4 );
memcpy( cfg->fcc, optarg, strlen( optarg ) < 4 ? strlen( optarg ) : 4 ); break;
default:
fprintf( stderr, \ return -1; } }
return 0; }
/***************************************************************************** * h264_parser_*:
*****************************************************************************/ void h264_parser_init( h264_t *h ) {
h->i_width = 0; h->i_height = 0; h->b_key = 0;
h->i_nal_type = -1; h->i_ref_idc = -1; h->i_idr_pic_id = -1; h->i_frame_num = -1;
h->i_log2_max_frame_num = 0; h->i_poc = -1;
h->i_poc_type = -1; }
void h264_parser_parse( h264_t *h, nal_t *nal, int *pb_nal_start ) {
bs_t s;
*pb_nal_start = 0;
if( nal->i_type == NAL_SPS || nal->i_type == NAL_PPS ) *pb_nal_start = 1;
bs_init( &s, nal->p_payload, nal->i_payload ); if( nal->i_type == NAL_SPS )
{
int i_tmp;
i_tmp = bs_read( &s, 8 ); bs_skip( &s, 1+1+1 + 5 + 8 ); /* sps id */
bs_read_ue( &s );
if( i_tmp >= 100 ) {
bs_read_ue( &s ); // chroma_format_idc bs_read_ue( &s ); // bit_depth_luma_minus8 bs_read_ue( &s ); // bit_depth_chroma_minus8
bs_skip( &s, 1 ); // qpprime_y_zero_transform_bypass_flag if( bs_read( &s, 1 ) ) // seq_scaling_matrix_present_flag {
int i, j;
for( i = 0; i < 8; i++ ) {
if( bs_read( &s, 1 ) ) // seq_scaling_list_present_flag[i] {
uint8_t i_tmp = 8;
for( j = 0; j < (i<6?16:64); j++ ) {
i_tmp += bs_read_se( &s ); if( i_tmp == 0 ) break; } } } } }
/* Skip i_log2_max_frame_num */
h->i_log2_max_frame_num = bs_read_ue( &s ) + 4; /* Read poc_type */
h->i_poc_type = bs_read_ue( &s ); if( h->i_poc_type == 0 ) {
h->i_log2_max_poc_lsb = bs_read_ue( &s ) + 4; }
else if( h->i_poc_type == 1 ) {
int i_cycle;
/* skip b_delta_pic_order_always_zero */ bs_skip( &s, 1 );
/* skip i_offset_for_non_ref_pic */ bs_read_se( &s );
/* skip i_offset_for_top_to_bottom_field */ bs_read_se( &s );
/* read i_num_ref_frames_in_poc_cycle */ i_cycle = bs_read_ue( &s ); if( i_cycle > 256 ) i_cycle = 256; while( i_cycle > 0 ) {
/* skip i_offset_for_ref_frame */ bs_read_se(&s ); } }
/* i_num_ref_frames */ bs_read_ue( &s );
/* b_gaps_in_frame_num_value_allowed */ bs_skip( &s, 1 );
/* Read size */
h->i_width = 16 * ( bs_read_ue( &s ) + 1 ); h->i_height = 16 * ( bs_read_ue( &s ) + 1 );
/* b_frame_mbs_only */ i_tmp = bs_read( &s, 1 ); if( i_tmp == 0 ) {
bs_skip( &s, 1 ); }
/* b_direct8x8_inference */ bs_skip( &s, 1 );
/* crop ? */
i_tmp = bs_read( &s, 1 ); if( i_tmp ) {
/* left */
h->i_width -= 2 * bs_read_ue( &s ); /* right */
h->i_width -= 2 * bs_read_ue( &s ); /* top */
h->i_height -= 2 * bs_read_ue( &s ); /* bottom */