58 int lsf, mpeg25, sample_rate_index, bitrate_index,
frame_size;
60 unsigned int header = 0xFFF00000;
62 lsf = sample_rate < (24000 + 32000) / 2;
63 mpeg25 = sample_rate < (12000 + 16000) / 2;
64 sample_rate <<= lsf + mpeg25;
65 if (sample_rate < (32000 + 44100) / 2)
66 sample_rate_index = 2;
67 else if (sample_rate < (44100 + 48000) / 2)
68 sample_rate_index = 0;
70 sample_rate_index = 1;
74 for (bitrate_index = 2; bitrate_index < 30; bitrate_index++) {
77 frame_size = (frame_size * 144000) / (sample_rate << lsf) +
80 if (frame_size == size)
84 header |= (!lsf) << 19;
85 header |= (4 - layer) << 17;
90 if (bitrate_index == 30)
93 header |= (bitrate_index >> 1) << 12;
94 header |= sample_rate_index << 10;
95 header |= (bitrate_index & 1) << 9;
127 static const uint8_t headers[][5] = {
128 { 3, 0x00, 0x00, 0x01 },
129 { 4, 0x00, 0x00, 0x01, 0xB6},
139 nut->
header[i] = &headers[i - 1][1];
159 if (keyframe_0_esc) {
167 for (stream_id = 0; stream_id < s->
nb_streams; stream_id++) {
168 int start2 = start + (end - start) * stream_id / s->
nb_streams;
169 int end2 = start + (end - start) * (stream_id + 1) / s->
nb_streams;
172 int intra_only = is_audio;
175 for (key_frame = 0; key_frame < 2; key_frame++) {
176 if (!intra_only || !keyframe_0_esc || key_frame != 0) {
188 key_frame = intra_only;
190 int frame_bytes = codec->frame_size * (int64_t)codec->bit_rate /
191 (8 * codec->sample_rate);
193 for (pts = 0; pts < 2; pts++)
194 for (pred = 0; pred < 2; pred++) {
213 if (codec->has_b_frames) {
230 for (pred = 0; pred < pred_count; pred++) {
231 int start3 = start2 + (end2 - start2) * pred / pred_count;
232 int end3 = start2 + (end2 - start2) * (pred + 1) / pred_count;
234 for (index = start3; index < end3; index++) {
267 int len = strlen(
string);
279 static inline void ff_put_v_trace(
AVIOContext *bc, uint64_t v,
const char *file,
280 const char *func,
int line)
287 static inline void put_s_trace(
AVIOContext *bc, int64_t v,
const char *file,
288 const char *func,
int line)
294 #define ff_put_v(bc, v) ff_put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
295 #define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
300 int calculate_checksum, uint64_t startcode)
304 int forw_ptr = dyn_size + 4 * calculate_checksum;
313 if (calculate_checksum)
316 if (calculate_checksum)
324 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields,
341 tmp_match = 1 - (1LL << 62);
343 for (i = 0; i < 256; ) {
367 for (j = 0; i < 256; j++, i++) {
381 if (j != tmp_mul - tmp_size)
493 int count = 0, dyn_size;
519 int count=0, dyn_size, i;
551 int ret, dyn_size, count = 0;
676 if (INT64_C(1000) * time_base.
num >= time_base.
den)
747 if (pkt->
size > 4096)
767 int best_length, frame_code,
flags, needed_flags, i, header_idx,
775 "Negative pts not supported stream %d, pts %"PRId64
"\n",
807 if (dummy.
pos == INT64_MAX)
831 best_length = INT_MAX;
833 for (i = 0; i < 256; i++) {
836 int flags = fc->
flags;
844 flags = needed_flags;
847 if ((flags & needed_flags) != needed_flags)
850 if ((flags ^ needed_flags) &
FLAG_KEY)
867 if ((flags & FLAG_CODED)
874 length += 1 - nut->
header_len[best_header_idx];
883 if (length < best_length) {
884 best_length = length;
888 assert(frame_code != -1);
897 ff_put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED));
898 flags = needed_flags;
907 ff_put_v(bc, header_idx = best_header_idx);
951 .mime_type =
"video/x-nut",