ixj.c

mgcp协议源代码。支持多种编码：g711

			j->rec_frame_size = 80;
			break;
		case 0x50:
			j->rec_frame_size = 40;
			break;
		default:
			j->rec_frame_size = 120;
			break;
		}
		j->rec_mode = 4;
		break;
	case LINEAR16:
		switch (j->baseframe.low) {
		case 0xA0:
			j->rec_frame_size = 160;
			break;
		case 0x50:
			j->rec_frame_size = 80;
			break;
		default:
			j->rec_frame_size = 240;
			break;
		}
		j->rec_mode = 5;
		break;
	case LINEAR8:
		switch (j->baseframe.low) {
		case 0xA0:
			j->rec_frame_size = 80;
			break;
		case 0x50:
			j->rec_frame_size = 40;
			break;
		default:
			j->rec_frame_size = 120;
			break;
		}
		j->rec_mode = 6;
		break;
	case WSS:
		switch (j->baseframe.low) {
		case 0xA0:
			j->rec_frame_size = 80;
			break;
		case 0x50:
			j->rec_frame_size = 40;
			break;
		default:
			j->rec_frame_size = 120;
			break;
		}
		j->rec_mode = 7;
		break;
	default:
		j->rec_frame_size = 0;
		j->rec_mode = -1;
		if (j->read_buffer) {
			kfree(j->read_buffer);
			j->read_buffer = NULL;
			j->read_buffer_size = 0;
		}
		retval = 1;
		break;
	}
	return retval;
}

static int ixj_record_start(int board)
{
	unsigned short cmd = 0x0000;
	IXJ *j = &ixj[board];

	if (!j->rec_mode) {
		switch (j->rec_codec) {
		case G723_63:
			cmd = 0x5131;
			break;
		case G723_53:
			cmd = 0x5132;
			break;
		case TS85:
			cmd = 0x5130;	// TrueSpeech 8.5

			break;
		case TS48:
			cmd = 0x5133;	// TrueSpeech 4.8

			break;
		case TS41:
			cmd = 0x5134;	// TrueSpeech 4.1

			break;
		case G728:
			cmd = 0x5135;
			break;
		case G729:
			cmd = 0x5136;
			break;
		default:
			return 1;
		}
		if (ixj_WriteDSPCommand(cmd, board))
			return -1;
	}
	if (!j->read_buffer) {
		if (!j->read_buffer)
			j->read_buffer = kmalloc(j->rec_frame_size * 2, GFP_KERNEL);
		if (!j->read_buffer) {
			printk("Read buffer allocation for ixj board %d failed!\n", board);
			return -ENOMEM;
		}
	}
	j->read_buffer_size = j->rec_frame_size * 2;

	if (ixj_WriteDSPCommand(0x5102, board))		// Set Poll sync mode

		return -1;

	switch (j->rec_mode) {
	case 0:
		cmd = 0x1C03;	// Record C1

		break;
	case 4:
		if (j->ver.low == 0x12) {
			cmd = 0x1E03;	// Record C1

		} else {
			cmd = 0x1E01;	// Record C1

		}
		break;
	case 5:
		if (j->ver.low == 0x12) {
			cmd = 0x1E83;	// Record C1

		} else {
			cmd = 0x1E81;	// Record C1

		}
		break;
	case 6:
		if (j->ver.low == 0x12) {
			cmd = 0x1F03;	// Record C1

		} else {
			cmd = 0x1F01;	// Record C1

		}
		break;
	case 7:
		if (j->ver.low == 0x12) {
			cmd = 0x1F83;	// Record C1

		} else {
			cmd = 0x1F81;	// Record C1

		}
		break;
	}
	if (ixj_WriteDSPCommand(cmd, board))
		return -1;

	return 0;
}

static void ixj_record_stop(int board)
{
	IXJ *j = &ixj[board];

	if (j->rec_mode > -1) {
		ixj_WriteDSPCommand(0x5120, board);
		j->rec_mode = -1;
	}
}

static void set_rec_depth(int board, int depth)
{
	if (depth > 60)
		depth = 60;
	if (depth < 0)
		depth = 0;
	ixj_WriteDSPCommand(0x5180 + depth, board);
}

static void set_rec_volume(int board, int volume)
{
	ixj_WriteDSPCommand(0xCF03, board);
	ixj_WriteDSPCommand(volume, board);
}

static int get_rec_level(int board)
{
	IXJ *j = &ixj[board];

	ixj_WriteDSPCommand(0xCF88, board);

	return j->ssr.high << 8 | j->ssr.low;
}

static void ixj_aec_start(int board, int level)
{
	IXJ *j = &ixj[board];

	j->aec_level = level;
	if (!level) {
		ixj_WriteDSPCommand(0xB002, board);
	} else {
		if (j->rec_codec == G729 || j->play_codec == G729) {
			ixj_WriteDSPCommand(0xE022, board);	// Move AEC filter buffer

			ixj_WriteDSPCommand(0x0300, board);
		}
		ixj_WriteDSPCommand(0xB001, board);	// AEC On

		ixj_WriteDSPCommand(0xE013, board);	// Advanced AEC C1

		switch (level) {
		case 1:
			ixj_WriteDSPCommand(0x0000, board);	// Advanced AEC C2 = off

			ixj_WriteDSPCommand(0xE011, board);
			ixj_WriteDSPCommand(0xFFFF, board);
			break;

		case 2:
			ixj_WriteDSPCommand(0x0600, board);	// Advanced AEC C2 = on medium

			ixj_WriteDSPCommand(0xE011, board);
			ixj_WriteDSPCommand(0x0080, board);
			break;

		case 3:
			ixj_WriteDSPCommand(0x0C00, board);	// Advanced AEC C2 = on high

			ixj_WriteDSPCommand(0xE011, board);
			ixj_WriteDSPCommand(0x0080, board);
			break;
		}
	}
}

static void aec_stop(int board)
{
	IXJ *j = &ixj[board];

	if (j->rec_codec == G729 || j->play_codec == G729) {
		ixj_WriteDSPCommand(0xE022, board);	// Move AEC filter buffer back

		ixj_WriteDSPCommand(0x0700, board);
	}
	if (ixj[board].play_mode != -1 && ixj[board].rec_mode != -1);
	{
		ixj_WriteDSPCommand(0xB002, board);	// AEC Stop

	}
}

static int set_play_codec(int board, int rate)
{
	int retval = 0;
	IXJ *j = &ixj[board];

	j->play_codec = rate;

	switch (rate) {
	case G723_63:
		if (j->ver.low != 0x12 || ixj_convert_loaded) {
			j->play_frame_size = 12;
			j->play_mode = 0;
		} else {
			retval = 1;
		}
		break;
	case G723_53:
		if (j->ver.low != 0x12 || ixj_convert_loaded) {
			j->play_frame_size = 10;
			j->play_mode = 0;
		} else {
			retval = 1;
		}
		break;
	case TS85:
		if (j->dsp.low == 0x20 || j->flags.ts85_loaded) {
			j->play_frame_size = 16;
			j->play_mode = 0;
		} else {
			retval = 1;
		}
		break;
	case TS48:
		if (j->ver.low != 0x12 || ixj_convert_loaded) {
			j->play_frame_size = 9;
			j->play_mode = 0;
		} else {
			retval = 1;
		}
		break;
	case TS41:
		if (j->ver.low != 0x12 || ixj_convert_loaded) {
			j->play_frame_size = 8;
			j->play_mode = 0;
		} else {
			retval = 1;
		}
		break;
	case G728:
		if (j->dsp.low != 0x20) {
			j->play_frame_size = 48;
			j->play_mode = 0;
		} else {
			retval = 1;
		}
		break;
	case G729:
		if (j->dsp.low != 0x20) {
			if (!j->flags.g729_loaded) {
				retval = 1;
				break;
			}
			switch (j->baseframe.low) {
			case 0xA0:
				j->play_frame_size = 10;
				break;
			case 0x50:
				j->play_frame_size = 5;
				break;
			default:
				j->play_frame_size = 15;
				break;
			}
			j->play_mode = 0;
		} else {
			retval = 1;
		}
		break;
	case ULAW:
		switch (j->baseframe.low) {
		case 0xA0:
			j->play_frame_size = 80;
			break;
		case 0x50:
			j->play_frame_size = 40;
			break;
		default:
			j->play_frame_size = 120;
			break;
		}
		j->play_mode = 2;
		break;
	case ALAW:
		switch (j->baseframe.low) {
		case 0xA0:
			j->play_frame_size = 80;
			break;
		case 0x50:
			j->play_frame_size = 40;
			break;
		default:
			j->play_frame_size = 120;
			break;
		}
		j->play_mode = 2;
		break;
	case LINEAR16:
		switch (j->baseframe.low) {
		case 0xA0:
			j->play_frame_size = 160;
			break;
		case 0x50:
			j->play_frame_size = 80;
			break;
		default:
			j->play_frame_size = 240;
			break;
		}
		j->play_mode = 6;
		break;
	case LINEAR8:
		switch (j->baseframe.low) {
		case 0xA0:
			j->play_frame_size = 80;
			break;
		case 0x50:
			j->play_frame_size = 40;
			break;
		default:
			j->play_frame_size = 120;
			break;
		}
		j->play_mode = 4;
		break;
	case WSS:
		switch (j->baseframe.low) {
		case 0xA0:
			j->play_frame_size = 80;
			break;
		case 0x50:
			j->play_frame_size = 40;
			break;
		default:
			j->play_frame_size = 120;
			break;
		}
		j->play_mode = 5;
		break;
	default:
		j->play_frame_size = 0;
		j->play_mode = -1;
		if (j->write_buffer) {
			kfree(j->write_buffer);
			j->write_buffer = NULL;
			j->write_buffer_size = 0;
		}
		retval = 1;
		break;
	}
	return retval;
}

static int ixj_play_start(int board)
{
	unsigned short cmd = 0x0000;
	IXJ *j = &ixj[board];

	j->flags.play_first_frame = 1;
	j->drybuffer = 0;

	if (!j->play_mode) {
		switch (j->play_codec) {
		case G723_63:
			cmd = 0x5231;
			break;
		case G723_53:
			cmd = 0x5232;
			break;
		case TS85:
			cmd = 0x5230;	// TrueSpeech 8.5

			break;
		case TS48:
			cmd = 0x5233;	// TrueSpeech 4.8

			break;
		case TS41:
			cmd = 0x5234;	// TrueSpeech 4.1

			break;
		case G728:
			cmd = 0x5235;
			break;
		case G729:
			cmd = 0x5236;
			break;
		default:
			return 1;
		}
		if (ixj_WriteDSPCommand(cmd, board))
			return -1;
	}
	if (!j->write_buffer) {
		j->write_buffer = kmalloc(j->play_frame_size * 2, GFP_KERNEL);
		if (!j->write_buffer) {
			printk("Write buffer allocation for ixj board %d failed!\n", board);
			return -ENOMEM;
		}
	}
	j->write_buffers_empty = 2;
	j->write_buffer_size = j->play_frame_size * 2;
	j->write_buffer_end = j->write_buffer + j->play_frame_size * 2;
	j->write_buffer_rp = j->write_buffer_wp = j->write_buffer;

	if (ixj_WriteDSPCommand(0x5202, board))		// Set Poll sync mode

		return -1;

	switch (j->play_mode) {
	case 0:
		cmd = 0x2C03;
		break;
	case 2:
		if (j->ver.low == 0x12) {
			cmd = 0x2C23;
		} else {
			cmd = 0x2C21;
		}
		break;
	case 4:
		if (j->ver.low == 0x12) {
			cmd = 0x2C43;
		} else {
			cmd = 0x2C41;
		}
		break;
	case 5:
		if (j->ver.low == 0x12) {
			cmd = 0x2C53;
		} else {
			cmd = 0x2C51;
		}
		break;
	case 6:
		if (j->ver.low == 0x12) {
			cmd = 0x2C63;
		} else {
			cmd = 0x2C61;
		}
		break;
	}
	if (ixj_WriteDSPCommand(cmd, board))
		return -1;

	if (ixj_WriteDSPCommand(0x2000, board))		// Playback C2

		return -1;

	if (ixj_WriteDSPCommand(0x2000 + ixj[board].play_frame_size, board))	// Playback C3

		return -1;

	return 0;
}

static void ixj_play_stop(int board)
{
	IXJ *j = &ixj[board];

	if (j->play_mode > -1) {
		ixj_WriteDSPCommand(0x5221, board);	// Stop playback

		j->play_mode = -1;
	}
}

extern __inline__ void set_play_depth(int board, int depth)
{
	if (depth > 60)
		depth = 60;
	if (depth < 0)
		depth = 0;
	ixj_WriteDSPCommand(0x5280 + depth, board);
}

extern __inline__ void set_play_volume(int board, int volume)
{
	ixj_WriteDSPCommand(0xCF02, board);
	ixj_WriteDSPCommand(volume, board);
}

extern __inline__ int get_play_level(int board)
{
	ixj_WriteDSPCommand(0xCF8F, board);
	return ixj[board].ssr.high << 8 | ixj[board].ssr.low;
}

static unsigned int ixj_poll(struct file *file_p, poll_table * wait)
{
	unsigned int mask = 0;
	IXJ *j = &ixj[NUM(file_p->f_dentry->d_inode->i_rdev)];

	poll_wait(file_p, &(j->poll_q), wait);
	if (j->read_buffer_ready > 0)
		mask |= POLLIN | POLLRDNORM;	/* readable */
	if (j->write_buffers_empty > 0)
		mask |= POLLOUT | POLLWRNORM;	/* writable */
	if (j->ex.bytes)
		mask |= POLLPRI;
	return mask;
}

static int ixj_play_tone(int board, char tone)
{
	IXJ *j = &ixj[board];

	if (!j->tone_state)