Пример #1
1
func (m *Muxer) writeAudioFrame(frame *C.AVFrame) bool {
	for C.av_audio_fifo_size(m.fifo) < 1024 { // generate & store in fifo
		C.fill_audio_frame(frame, m.audioStream.stream.codec)
		frame_size := frame.nb_samples
		if C.av_audio_fifo_realloc(m.fifo, C.av_audio_fifo_size(m.fifo)+frame_size) < 0 {
			return false
		}
		if C.av_audio_fifo_write(m.fifo, (*unsafe.Pointer)(unsafe.Pointer(&frame.data[0])), frame_size) < frame_size {
			return false
		}
	}
	got_packet := C.int(0)
	for C.av_audio_fifo_size(m.fifo) >= 1024 { // read & encode & write
		frame_size := C.min(C.av_audio_fifo_size(m.fifo), m.audioStream.stream.codec.frame_size)
		output_frame := C.alloc_audio_frame(m.audioStream.stream.codec)
		if C.av_audio_fifo_read(m.fifo, (*unsafe.Pointer)(unsafe.Pointer(&output_frame.data[0])), frame_size) < frame_size {
			C.av_frame_free(&output_frame)
			return false
		}
		pkt := C.AVPacket{}
		C.av_init_packet(&pkt)
		output_frame.pts = C.int64_t(m.audioStream.ts)
		m.audioStream.ts += int(m.audioStream.stream.codec.frame_size)
		if C.avcodec_encode_audio2(m.audioStream.stream.codec, &pkt, frame, &got_packet) < 0 {
			C.av_free_packet(&pkt)
			return false
		}
		if got_packet == 0 {
			continue
		}
		C.av_packet_rescale_ts(&pkt, m.audioStream.stream.codec.time_base, m.audioStream.stream.time_base)
		pkt.stream_index = m.audioStream.stream.index
		if C.av_interleaved_write_frame(m.context, &pkt) < 0 {
			return false
		}
	}
	return true
}
Пример #2
0
func (m *Muxer) routine() {
	vFrame := C.alloc_video_frame(m.videoStream.stream.codec)
	if vFrame == (*C.AVFrame)(null) {
		m.done <- true
		return
	}
	aFrame := C.alloc_audio_frame(m.audioStream.stream.codec)
	if aFrame == (*C.AVFrame)(null) {
		m.done <- true
		return
	}
	for m.loop {
		if C.av_compare_ts(C.int64_t(m.videoStream.ts), m.videoStream.stream.codec.time_base,
			C.int64_t(m.audioStream.ts), m.audioStream.stream.codec.time_base) <= 0 {
			m.writeVideoFrame(vFrame)
		} else {
			m.writeAudioFrame(aFrame)
		}
		time.Sleep(time.Millisecond * 30)
	}
	if vFrame != (*C.AVFrame)(null) {
		C.av_frame_free(&vFrame)
	}
	if aFrame != (*C.AVFrame)(null) {
		C.av_frame_free(&aFrame)
	}
	m.done <- true
}