C++ (Cpp) AUD_Buffer::getSizeの例

コード例 #1

ファイル: AUD_FFMPEGReader.cpp プロジェクト: mik0001/Blender

int AUD_FFMPEGReader::decode(AVPacket* packet, AUD_Buffer& buffer)
{
	// save packet parameters
	uint8_t *audio_pkg_data = packet->data;
	int audio_pkg_size = packet->size;

	int buf_size = buffer.getSize();
	int buf_pos = 0;

	int read_length, data_size;

	AVPacket tmp_pkt;
	
	av_init_packet(&tmp_pkt);

	// as long as there is still data in the package
	while(audio_pkg_size > 0)
	{
		// resize buffer if needed
		if(buf_size - buf_pos < AVCODEC_MAX_AUDIO_FRAME_SIZE)
		{
			buffer.resize(buf_size + AVCODEC_MAX_AUDIO_FRAME_SIZE, true);
			buf_size += AVCODEC_MAX_AUDIO_FRAME_SIZE;
		}

		// read samples from the packet
		data_size = buf_size - buf_pos;

		tmp_pkt.data = audio_pkg_data;
		tmp_pkt.size = audio_pkg_size;

		read_length = avcodec_decode_audio3(
			m_codecCtx,
			(int16_t*)(((data_t*)buffer.getBuffer()) + buf_pos),
			&data_size, &tmp_pkt);

		// read error, next packet!
		if(read_length < 0)
			break;

		buf_pos += data_size;

		// move packet parameters
		audio_pkg_data += read_length;
		audio_pkg_size -= read_length;
	}

	return buf_pos;
}

コード例 #2

ファイル: AUD_FFMPEGReader.cpp プロジェクト: JasonWilkins/blender-wayland

int AUD_FFMPEGReader::decode(AVPacket& packet, AUD_Buffer& buffer)
{
#ifdef FFMPEG_HAVE_DECODE_AUDIO4
	AVFrame* frame = NULL;
	int got_frame;
	int read_length;
	uint8_t* orig_data = packet.data;
	int orig_size = packet.size;

	int buf_size = buffer.getSize();
	int buf_pos = 0;

	while(packet.size > 0)
	{
		got_frame = 0;

		if(!frame)
			frame = avcodec_alloc_frame();
		else
			avcodec_get_frame_defaults(frame);

		read_length = avcodec_decode_audio4(m_codecCtx, frame, &got_frame, &packet);
		if(read_length < 0)
			break;

		if(got_frame)
		{
			int data_size = av_samples_get_buffer_size(NULL, m_codecCtx->channels, frame->nb_samples, m_codecCtx->sample_fmt, 1);

			if(buf_size - buf_pos < data_size)
			{
				buffer.resize(buf_size + data_size, true);
				buf_size += data_size;
			}

			if(m_tointerleave)
			{
				int single_size = data_size / m_codecCtx->channels / frame->nb_samples;
				for(int channel = 0; channel < m_codecCtx->channels; channel++)
				{
					for(int i = 0; i < frame->nb_samples; i++)
					{
						memcpy(((data_t*)buffer.getBuffer()) + buf_pos + ((m_codecCtx->channels * i) + channel) * single_size,
							   frame->data[channel] + i * single_size, single_size);
					}
				}
			}
			else
				memcpy(((data_t*)buffer.getBuffer()) + buf_pos, frame->data[0], data_size);

			buf_pos += data_size;
		}
		packet.size -= read_length;
		packet.data += read_length;
	}

	packet.data = orig_data;
	packet.size = orig_size;
	av_free(frame);

	return buf_pos;
#else
	// save packet parameters
	uint8_t *audio_pkg_data = packet.data;
	int audio_pkg_size = packet.size;

	int buf_size = buffer.getSize();
	int buf_pos = 0;

	int read_length, data_size;

	AVPacket tmp_pkt;

	av_init_packet(&tmp_pkt);

	// as long as there is still data in the package
	while(audio_pkg_size > 0)
	{
		// resize buffer if needed
		if(buf_size - buf_pos < AVCODEC_MAX_AUDIO_FRAME_SIZE)
		{
			buffer.resize(buf_size + AVCODEC_MAX_AUDIO_FRAME_SIZE, true);
			buf_size += AVCODEC_MAX_AUDIO_FRAME_SIZE;
		}

		// read samples from the packet
		data_size = buf_size - buf_pos;

		tmp_pkt.data = audio_pkg_data;
		tmp_pkt.size = audio_pkg_size;

		read_length = avcodec_decode_audio3(
			m_codecCtx,
			(int16_t*)(((data_t*)buffer.getBuffer()) + buf_pos),
			&data_size, &tmp_pkt);

		// read error, next packet!
		if(read_length < 0)
			break;

		buf_pos += data_size;

		// move packet parameters
		audio_pkg_data += read_length;
		audio_pkg_size -= read_length;
	}

	return buf_pos;
#endif
}