static void ffm_write_data(AVFormatContext *s, const uint8_t *buf, int size, int64_t pts, int header) { FFMContext *ffm = s->priv_data; int len; if (header && ffm->frame_offset == 0) { ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE; ffm->pts = pts; } /* write as many packets as needed */ while (size > 0) { len = ffm->packet_end - ffm->packet_ptr; if (len > size) len = size; memcpy(ffm->packet_ptr, buf, len); ffm->packet_ptr += len; buf += len; size -= len; if (ffm->packet_ptr >= ffm->packet_end) { /* special case : no pts in packet : we leave the current one */ if (ffm->pts == 0) ffm->pts = pts; flush_packet(s); } } }