51 int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size;
53 unsigned int header= 0xFFF00000;
55 lsf = sample_rate < (24000+32000)/2;
56 mpeg25 = sample_rate < (12000+16000)/2;
57 sample_rate <<= lsf + mpeg25;
58 if (sample_rate < (32000 + 44100)/2) sample_rate_index=2;
59 else if(sample_rate < (44100 + 48000)/2) sample_rate_index=0;
60 else sample_rate_index=1;
64 for(bitrate_index=2; bitrate_index<30; bitrate_index++){
66 frame_size = (frame_size * 144000) / (sample_rate << lsf) + (bitrate_index&1);
68 if(frame_size == size)
73 header |= (4-layer)<<17;
78 if(bitrate_index == 30)
81 header |= (bitrate_index>>1)<<12;
82 header |= sample_rate_index<<10;
83 header |= (bitrate_index&1)<<9;
102 && !memcmp(out, nut->
header[i], len)){
116 static const uint8_t headers[][5]={
117 {3, 0x00, 0x00, 0x01},
118 {4, 0x00, 0x00, 0x01, 0xB6},
128 nut->
header [i]= &headers[i-1][1];
155 for(stream_id= 0; stream_id<s->
nb_streams; stream_id++){
156 int start2= start + (end-start)*stream_id / s->
nb_streams;
157 int end2 = start + (end-start)*(stream_id+1) / s->
nb_streams;
163 for(key_frame=0; key_frame<2; key_frame++){
164 if(
intra_only && keyframe_0_esc && key_frame==0)
181 int frame_bytes= codec->frame_size*(int64_t)codec->bit_rate / (8*codec->sample_rate);
183 for(pts=0; pts<2; pts++){
184 for(pred=0; pred<2; pred++){
204 if(codec->has_b_frames){
221 for(pred=0; pred<pred_count; pred++){
222 int start3= start2 + (end2-start2)*pred / pred_count;
223 int end3 = start2 + (end2-start2)*(pred+1) / pred_count;
225 for(index=start3; index<end3; index++){
255 int len= strlen(
string);
266 static inline void ff_put_v_trace(
AVIOContext *bc, uint64_t
v,
char *file,
char *func,
int line){
272 static inline void put_s_trace(
AVIOContext *bc, int64_t
v,
char *file,
char *func,
int line){
277 #define ff_put_v(bc, v) ff_put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
278 #define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
283 uint8_t *dyn_buf=
NULL;
285 int forw_ptr= dyn_size + 4*calculate_checksum;
294 if(calculate_checksum)
297 if(calculate_checksum)
304 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields, tmp_head_idx;
320 tmp_match= 1-(1LL<<62);
341 for(j=0; i<256; j++,i++){
354 if(j != tmp_mul - tmp_size) tmp_fields=6;
358 if(tmp_fields>0)
put_s(bc, tmp_pts);
359 if(tmp_fields>1)
ff_put_v(bc, tmp_mul);
360 if(tmp_fields>2)
ff_put_v(bc, tmp_stream);
361 if(tmp_fields>3)
ff_put_v(bc, tmp_size);
364 if(tmp_fields>6)
ff_put_v(bc, tmp_match);
365 if(tmp_fields>7)
ff_put_v(bc, tmp_head_idx);
437 uint8_t *dyn_buf=
NULL;
438 int count=0, dyn_size;
463 uint8_t *dyn_buf=
NULL;
464 int count=0, dyn_size, i;
493 uint8_t *dyn_buf =
NULL;
496 int ret, dyn_size, count = 0;
618 if(INT64_C(1000) * time_base.
num >= time_base.
den)
700 int best_length, frame_code,
flags, needed_flags, i, header_idx, best_header_idx;
757 for(i=0; i<256; i++){
760 int flags= fc->
flags;
768 flags = needed_flags;
771 if((flags & needed_flags) != needed_flags)
774 if((flags ^ needed_flags) &
FLAG_KEY)
791 if( (flags & FLAG_CODED)
797 length += 1 - nut->
header_len[best_header_idx];
806 if(length < best_length){
811 assert(frame_code != -1);
820 ff_put_v(bc, (flags^needed_flags) & ~(FLAG_CODED));
821 flags = needed_flags;
866 .mime_type =
"video/x-nut",