| 1691 | | #ifdef CAM_CHDK_PTP |
| 1692 | | // PTP Live View functions |
| 1693 | | |
| 1694 | | // Function used to get viewport, bitmap and palette data via PTP |
| 1695 | | // Address of this function sent back to client program which then |
| 1696 | | // calls this with options to determine what to transfer |
| 1697 | | static int handle_video_transfer(ptp_data *data, int flags, int arg2) |
| 1698 | | { |
| 1699 | | int total_size; // Calculated total size of data to transfer to client |
| 1700 | | |
| 1701 | | // Structure containing the info for the current live view frame |
| 1702 | | // This information may change across calls |
| 1703 | | struct { |
| 1704 | | int vp_xoffset; // Viewport X offset in pixels (for cameras with variable image size) |
| 1705 | | int vp_yoffset; // Viewpoer Y offset in pixels (for cameras with variable image size) |
| 1706 | | int vp_width; // Actual viewport width in pixels (for cameras with variable image size) |
| 1707 | | int vp_height; // Actual viewport height in pixels (for cameras with variable image size) |
| 1708 | | int vp_buffer_start; // Offset in data transferred where the viewport data starts |
| 1709 | | int vp_buffer_size; // Size of viewport data sent (in bytes) |
| 1710 | | int bm_buffer_start; // Offset in data transferred where the bitmap data starts |
| 1711 | | int bm_buffer_size; // Size of bitmap data sent (in bytes) |
| 1712 | | int palette_type; // Camera palette type |
| 1713 | | // (0 = no palette, 1 = 16 x 4 byte AYUV values, 2 = 16 x 4 byte AYUV values with A = 0..3, 3 = 256 x 4 byte AYUV values with A = 0..3) |
| 1714 | | int palette_buffer_start; // Offset in data transferred where the palette data starts |
| 1715 | | int palette_buffer_size; // Size of palette data sent (in bytes) |
| 1716 | | } vid_info; |
| 1717 | | |
| 1718 | | // Populate the above structure with the current default details |
| 1719 | | vid_info.vp_xoffset = vid_get_viewport_xoffset_proper(); |
| 1720 | | vid_info.vp_yoffset = vid_get_viewport_yoffset_proper(); |
| 1721 | | vid_info.vp_width = vid_get_viewport_width_proper(); |
| 1722 | | vid_info.vp_height = vid_get_viewport_height_proper(); |
| 1723 | | vid_info.vp_buffer_start = 0; |
| 1724 | | vid_info.vp_buffer_size = 0; |
| 1725 | | vid_info.bm_buffer_start = 0; |
| 1726 | | vid_info.bm_buffer_size = 0; |
| 1727 | | vid_info.palette_type = vid_get_palette_type(); |
| 1728 | | vid_info.palette_buffer_start = 0; |
| 1729 | | vid_info.palette_buffer_size = 0; |
| 1730 | | |
| 1731 | | total_size = sizeof(vid_info); |
| 1732 | | |
| 1733 | | // Add viewport details if requested |
| 1734 | | if ( flags & 0x1 ) // live buffer |
| 1735 | | { |
| 1736 | | vid_info.vp_buffer_start = total_size; |
| 1737 | | vid_info.vp_buffer_size = (vid_get_viewport_buffer_width_proper()*vid_get_viewport_max_height()*6)/4; |
| 1738 | | total_size += vid_info.vp_buffer_size; |
| 1739 | | } |
| 1740 | | |
| 1741 | | // Add bitmap details if requested |
| 1742 | | if ( flags & 0x4 ) // bitmap buffer |
| 1743 | | { |
| 1744 | | vid_info.bm_buffer_start = total_size; |
| 1745 | | vid_info.bm_buffer_size = camera_screen.buffer_width*camera_screen.height; |
| 1746 | | total_size += vid_info.bm_buffer_size; |
| 1747 | | } |
| 1748 | | |
| 1749 | | // Add palette detals if requested |
| 1750 | | if ( flags & 0x8 ) // bitmap palette |
| 1751 | | { |
| 1752 | | vid_info.palette_buffer_start = total_size; |
| 1753 | | vid_info.palette_buffer_size = vid_get_palette_size(); |
| 1754 | | total_size += vid_info.palette_buffer_size; |
| 1755 | | } |
| 1756 | | |
| 1757 | | // Send header structure (along with total size to be sent) |
| 1758 | | data->send_data(data->handle,(char*)&vid_info,sizeof(vid_info),total_size,0,0,0); |
| 1759 | | |
| 1760 | | // Send viewport data if requested |
| 1761 | | if ( flags & 0x1 ) |
| 1762 | | { |
| 1763 | | data->send_data(data->handle,vid_get_viewport_active_buffer(),vid_info.vp_buffer_size,0,0,0,0); |
| 1764 | | } |
| 1765 | | |
| 1766 | | // Send bitmap data if requested |
| 1767 | | if ( flags & 0x4 ) |
| 1768 | | { |
| 1769 | | data->send_data(data->handle,vid_get_bitmap_active_buffer(),vid_info.bm_buffer_size,0,0,0,0); |
| 1770 | | } |
| 1771 | | |
| 1772 | | // Send palette data if requested |
| 1773 | | if ( flags & 0x8 ) |
| 1774 | | { |
| 1775 | | data->send_data(data->handle,vid_get_bitmap_active_palette(),vid_info.palette_buffer_size,0,0,0,0); |
| 1776 | | } |
| 1777 | | |
| 1778 | | return 0; |
| 1779 | | } |
| 1780 | | |
| 1781 | | // Lua function to return base info for PTP live view, including address of above transfer function |
| 1782 | | static int luaCB_get_video_details( lua_State* L ) |
| 1783 | | { |
| 1784 | | // Structure to popualate with live view details |
| 1785 | | // These details are static and only need to be retrieved once |
| 1786 | | struct { |
| 1787 | | int transfer_function; // Address of transfer function above |
| 1788 | | int vp_max_width; // Maximum viewport width (in pixels) |
| 1789 | | int vp_max_height; // Maximum viewport height (in pixels) |
| 1790 | | int vp_buffer_width; // Viewport buffer width in case buffer is wider than visible viewport (in pixels) |
| 1791 | | int bm_max_width; // Maximum width of bitmap (in pixels) |
| 1792 | | int bm_max_height; // Maximum height of bitmap (in pixels) |
| 1793 | | int bm_buffer_width; // Bitmap buffer width in case buffer is wider than visible bitmap (in pixels) |
| 1794 | | int lcd_aspect_ratio; // 0 = 4:3, 1 = 16:9 |
| 1795 | | } details; |
| 1796 | | |
| 1797 | | // Populate structure info |
| 1798 | | details.transfer_function = (int) handle_video_transfer; |
| 1799 | | details.vp_max_width = vid_get_viewport_max_width(); |
| 1800 | | details.vp_max_height = vid_get_viewport_max_height(); |
| 1801 | | details.vp_buffer_width = vid_get_viewport_buffer_width_proper(); |
| 1802 | | #if CAM_USES_ASPECT_CORRECTION |
| 1803 | | details.bm_max_width = ASPECT_XCORRECTION(camera_screen.width); |
| 1804 | | #else |
| 1805 | | details.bm_max_width = camera_screen.width; |
| 1806 | | #endif |
| 1807 | | details.bm_max_height = camera_screen.height; |
| 1808 | | details.bm_buffer_width = camera_screen.buffer_width; |
| 1809 | | details.lcd_aspect_ratio = vid_get_aspect_ratio(); |
| 1810 | | |
| 1811 | | // Send data back to client |
| 1812 | | lua_pushlstring( L, (char *) &details, sizeof(details) ); |
| 1813 | | |
| 1814 | | return 1; |
| 1815 | | } |
| 1816 | | #endif |
| 1817 | | |
