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libtdevnc/libvncclient/h264.c

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/*
* Copyright (C) 2012 Intel Corporation. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef LIBVNCSERVER_CONFIG_LIBVA
#include <X11/Xlib.h>
#include <va/va_version.h>
#if VA_CHECK_VERSION(0,34,0)
#include <va/va_compat.h>
#endif
#include <va/va_x11.h>
enum _slice_types {
SLICE_TYPE_P = 0, /* Predicted */
SLICE_TYPE_B = 1, /* Bi-predicted */
SLICE_TYPE_I = 2, /* Intra coded */
};
#define SURFACE_NUM 7
VADisplay va_dpy = NULL;
VAConfigID va_config_id;
VASurfaceID va_surface_id[SURFACE_NUM];
VAContextID va_context_id = 0;
VABufferID va_pic_param_buf_id[SURFACE_NUM];
VABufferID va_mat_param_buf_id[SURFACE_NUM];
VABufferID va_sp_param_buf_id[SURFACE_NUM];
VABufferID va_d_param_buf_id[SURFACE_NUM];
static int cur_height = 0;
static int cur_width = 0;
static unsigned int num_frames = 0;
static int sid = 0;
static unsigned int frame_id = 0;
static int field_order_count = 0;
static VASurfaceID curr_surface = VA_INVALID_ID;
VAStatus gva_status;
VASurfaceStatus gsurface_status;
#define CHECK_SURF(X) \
gva_status = vaQuerySurfaceStatus(va_dpy, X, &gsurface_status); \
if (gsurface_status != 4) printf("ss: %d\n", gsurface_status);
#ifdef _DEBUG
#define DebugLog(A) rfbClientLog A
#else
#define DebugLog(A)
#endif
#define CHECK_VASTATUS(va_status,func) \
if (va_status != VA_STATUS_SUCCESS) { \
/*fprintf(stderr,"%s:%s (%d) failed,exit\n", __func__, func, __LINE__);*/ \
rfbClientErr("%s:%s:%d failed (0x%x),exit\n", __func__, func, __LINE__, va_status); \
exit(1); \
} else { \
/*fprintf(stderr,">> SUCCESS for: %s:%s (%d)\n", __func__, func, __LINE__);*/ \
DebugLog(("%s:%s:%d success\n", __func__, func, __LINE__)); \
}
/*
* Forward declarations
*/
static void h264_decode_frame(int f_width, int f_height, char *framedata, int framesize, int slice_type);
static void SetVAPictureParameterBufferH264(VAPictureParameterBufferH264 *p, int width, int height);
static void SetVASliceParameterBufferH264(VASliceParameterBufferH264 *p);
static void SetVASliceParameterBufferH264_Intra(VASliceParameterBufferH264 *p, int first);
static void put_updated_rectangle(rfbClient *client, int x, int y, int width, int height, int f_width, int f_height, int first_for_frame);
static void nv12_to_rgba(const VAImage vaImage, rfbClient *client, int ch_x, int ch_y, int ch_w, int ch_h);
/* FIXME: get this value from the server instead of hardcoding 32bit pixels */
#define BPP (4 * 8)
static const char *string_of_FOURCC(uint32_t fourcc)
{
static int buf;
static char str[2][5];
buf ^= 1;
str[buf][0] = fourcc;
str[buf][1] = fourcc >> 8;
str[buf][2] = fourcc >> 16;
str[buf][3] = fourcc >> 24;
str[buf][4] = '\0';
return str[buf];
}
static inline const char *string_of_VAImageFormat(VAImageFormat *imgfmt)
{
return string_of_FOURCC(imgfmt->fourcc);
}
static rfbBool
HandleH264 (rfbClient* client, int rx, int ry, int rw, int rh)
{
rfbH264Header hdr;
char *framedata;
DebugLog(("Framebuffer update with H264 (x: %d, y: %d, w: %d, h: %d)\n", rx, ry, rw, rh));
/* First, read the frame size and allocate buffer to store the data */
if (!ReadFromRFBServer(client, (char *)&hdr, sz_rfbH264Header))
return FALSE;
hdr.slice_type = rfbClientSwap32IfLE(hdr.slice_type);
hdr.nBytes = rfbClientSwap32IfLE(hdr.nBytes);
hdr.width = rfbClientSwap32IfLE(hdr.width);
hdr.height = rfbClientSwap32IfLE(hdr.height);
framedata = (char*) malloc(hdr.nBytes);
/* Obtain frame data from the server */
DebugLog(("Reading %d bytes of frame data (type: %d)\n", hdr.nBytes, hdr.slice_type));
if (!ReadFromRFBServer(client, framedata, hdr.nBytes))
return FALSE;
/* First make sure we have a large enough raw buffer to hold the
* decompressed data. In practice, with a fixed BPP, fixed frame
* buffer size and the first update containing the entire frame
* buffer, this buffer allocation should only happen once, on the
* first update.
*/
if ( client->raw_buffer_size < (( rw * rh ) * ( BPP / 8 ))) {
if ( client->raw_buffer != NULL ) {
free( client->raw_buffer );
}
client->raw_buffer_size = (( rw * rh ) * ( BPP / 8 ));
client->raw_buffer = (char*) malloc( client->raw_buffer_size );
rfbClientLog("Allocated raw buffer of %d bytes (%dx%dx%d BPP)\n", client->raw_buffer_size, rw, rh, BPP);
}
/* Decode frame if frame data was sent. Server only sends frame data for the first
* framebuffer update message for a particular frame buffer contents.
* If more than 1 rectangle is updated, the messages after the first one (with
* the H.264 frame) have nBytes == 0.
*/
if (hdr.nBytes > 0) {
DebugLog((" decoding %d bytes of H.264 data\n", hdr.nBytes));
h264_decode_frame(hdr.width, hdr.height, framedata, hdr.nBytes, hdr.slice_type);
}
DebugLog((" updating rectangle (%d, %d)-(%d, %d)\n", rx, ry, rw, rh));
put_updated_rectangle(client, rx, ry, rw, rh, hdr.width, hdr.height, hdr.nBytes != 0);
free(framedata);
return TRUE;
}
static void h264_cleanup_decoder()
{
VAStatus va_status;
rfbClientLog("%s()\n", __FUNCTION__);
if (va_surface_id[0] != VA_INVALID_ID) {
va_status = vaDestroySurfaces(va_dpy, &va_surface_id[0], SURFACE_NUM);
CHECK_VASTATUS(va_status, "vaDestroySurfaces");
}
if (va_context_id) {
va_status = vaDestroyContext(va_dpy, va_context_id);
CHECK_VASTATUS(va_status, "vaDestroyContext");
va_context_id = 0;
}
num_frames = 0;
sid = 0;
frame_id = 0;
field_order_count = 0;
}
static void h264_init_decoder(int width, int height)
{
VAStatus va_status;
if (va_context_id) {
rfbClientLog("%s: va_dpy already initialized\n", __FUNCTION__);
}
if (va_dpy != NULL) {
rfbClientLog("%s: Re-initializing H.264 decoder\n", __FUNCTION__);
}
else {
rfbClientLog("%s: initializing H.264 decoder\n", __FUNCTION__);
/* Attach VA display to local X display */
Display *win_display = (Display *)XOpenDisplay(":0.0");
if (win_display == NULL) {
rfbClientErr("Can't connect to local display\n");
exit(-1);
}
int major_ver, minor_ver;
va_dpy = vaGetDisplay(win_display);
va_status = vaInitialize(va_dpy, &major_ver, &minor_ver);
CHECK_VASTATUS(va_status, "vaInitialize");
rfbClientLog("%s: libva version %d.%d found\n", __FUNCTION__, major_ver, minor_ver);
}
/* Check for VLD entrypoint */
int num_entrypoints;
VAEntrypoint entrypoints[5];
int vld_entrypoint_found = 0;
/* Change VAProfileH264High if needed */
VAProfile profile = VAProfileH264High;
va_status = vaQueryConfigEntrypoints(va_dpy, profile, entrypoints, &num_entrypoints);
CHECK_VASTATUS(va_status, "vaQueryConfigEntrypoints");
int i;
for (i = 0; i < num_entrypoints; ++i) {
if (entrypoints[i] == VAEntrypointVLD) {
vld_entrypoint_found = 1;
break;
}
}
if (vld_entrypoint_found == 0) {
rfbClientErr("VLD entrypoint not found\n");
exit(1);
}
/* Create configuration for the decode pipeline */
VAConfigAttrib attrib;
attrib.type = VAConfigAttribRTFormat;
va_status = vaCreateConfig(va_dpy, profile, VAEntrypointVLD, &attrib, 1, &va_config_id);
CHECK_VASTATUS(va_status, "vaCreateConfig");
/* Create VA surfaces */
for (i = 0; i < SURFACE_NUM; ++i) {
va_surface_id[i] = VA_INVALID_ID;
va_pic_param_buf_id[i] = VA_INVALID_ID;
va_mat_param_buf_id[i] = VA_INVALID_ID;
va_sp_param_buf_id[i] = VA_INVALID_ID;
va_d_param_buf_id[i] = VA_INVALID_ID;
}
va_status = vaCreateSurfaces(va_dpy, width, height, VA_RT_FORMAT_YUV420, SURFACE_NUM, &va_surface_id[0]);
CHECK_VASTATUS(va_status, "vaCreateSurfaces");
for (i = 0; i < SURFACE_NUM; ++i) {
DebugLog(("%s: va_surface_id[%d] = %p\n", __FUNCTION__, i, va_surface_id[i]));
}
/* Create VA context */
va_status = vaCreateContext(va_dpy, va_config_id, width, height, 0/*VA_PROGRESSIVE*/, &va_surface_id[0], SURFACE_NUM, &va_context_id);
CHECK_VASTATUS(va_status, "vaCreateContext");
DebugLog(("%s: VA context created (id: %d)\n", __FUNCTION__, va_context_id));
/* Instantiate decode pipeline */
va_status = vaBeginPicture(va_dpy, va_context_id, va_surface_id[0]);
CHECK_VASTATUS(va_status, "vaBeginPicture");
rfbClientLog("%s: H.264 decoder initialized\n", __FUNCTION__);
}
static void h264_decode_frame(int f_width, int f_height, char *framedata, int framesize, int slice_type)
{
VAStatus va_status;
DebugLog(("%s: called for frame of %d bytes (%dx%d) slice_type=%d\n", __FUNCTION__, framesize, width, height, slice_type));
/* Initialize decode pipeline if necessary */
if ( (f_width > cur_width) || (f_height > cur_height) ) {
if (va_dpy != NULL)
h264_cleanup_decoder();
cur_width = f_width;
cur_height = f_height;
h264_init_decoder(f_width, f_height);
rfbClientLog("%s: decoder initialized\n", __FUNCTION__);
}
/* Decode frame */
static VAPictureH264 va_picture_h264, va_old_picture_h264;
/* The server should always send an I-frame when a new client connects
* or when the resolution of the framebuffer changes, but we check
* just in case.
*/
if ( (slice_type != SLICE_TYPE_I) && (num_frames == 0) ) {
rfbClientLog("First frame is not an I frame !!! Skipping!!!\n");
return;
}
DebugLog(("%s: frame_id=%d va_surface_id[%d]=0x%x field_order_count=%d\n", __FUNCTION__, frame_id, sid, va_surface_id[sid], field_order_count));
va_picture_h264.picture_id = va_surface_id[sid];
va_picture_h264.frame_idx = frame_id;
va_picture_h264.flags = 0;
va_picture_h264.BottomFieldOrderCnt = field_order_count;
va_picture_h264.TopFieldOrderCnt = field_order_count;
/* Set up picture parameter buffer */
if (va_pic_param_buf_id[sid] == VA_INVALID_ID) {
va_status = vaCreateBuffer(va_dpy, va_context_id, VAPictureParameterBufferType, sizeof(VAPictureParameterBufferH264), 1, NULL, &va_pic_param_buf_id[sid]);
CHECK_VASTATUS(va_status, "vaCreateBuffer(PicParam)");
}
CHECK_SURF(va_surface_id[sid]);
VAPictureParameterBufferH264 *pic_param_buf = NULL;
va_status = vaMapBuffer(va_dpy, va_pic_param_buf_id[sid], (void **)&pic_param_buf);
CHECK_VASTATUS(va_status, "vaMapBuffer(PicParam)");
SetVAPictureParameterBufferH264(pic_param_buf, f_width, f_height);
memcpy(&pic_param_buf->CurrPic, &va_picture_h264, sizeof(VAPictureH264));
if (slice_type == SLICE_TYPE_P) {
memcpy(&pic_param_buf->ReferenceFrames[0], &va_old_picture_h264, sizeof(VAPictureH264));
pic_param_buf->ReferenceFrames[0].flags = 0;
}
else if (slice_type != SLICE_TYPE_I) {
rfbClientLog("Frame type %d not supported!!!\n");
return;
}
pic_param_buf->frame_num = frame_id;
va_status = vaUnmapBuffer(va_dpy, va_pic_param_buf_id[sid]);
CHECK_VASTATUS(va_status, "vaUnmapBuffer(PicParam)");
/* Set up IQ matrix buffer */
if (va_mat_param_buf_id[sid] == VA_INVALID_ID) {
va_status = vaCreateBuffer(va_dpy, va_context_id, VAIQMatrixBufferType, sizeof(VAIQMatrixBufferH264), 1, NULL, &va_mat_param_buf_id[sid]);
CHECK_VASTATUS(va_status, "vaCreateBuffer(IQMatrix)");
}
CHECK_SURF(va_surface_id[sid]);
VAIQMatrixBufferH264 *iq_matrix_buf = NULL;
va_status = vaMapBuffer(va_dpy, va_mat_param_buf_id[sid], (void **)&iq_matrix_buf);
CHECK_VASTATUS(va_status, "vaMapBuffer(IQMatrix)");
static const unsigned char m_MatrixBufferH264[]= {
/* ScalingList4x4[6][16] */
0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
/* ScalingList8x8[2][64] */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
memcpy(iq_matrix_buf, m_MatrixBufferH264, 224);
va_status = vaUnmapBuffer(va_dpy, va_mat_param_buf_id[sid]);
CHECK_VASTATUS(va_status, "vaUnmapBuffer(IQMatrix)");
VABufferID buffer_ids[2];
buffer_ids[0] = va_pic_param_buf_id[sid];
buffer_ids[1] = va_mat_param_buf_id[sid];
CHECK_SURF(va_surface_id[sid]);
va_status = vaRenderPicture(va_dpy, va_context_id, buffer_ids, 2);
CHECK_VASTATUS(va_status, "vaRenderPicture");
/* Set up slice parameter buffer */
if (va_sp_param_buf_id[sid] == VA_INVALID_ID) {
va_status = vaCreateBuffer(va_dpy, va_context_id, VASliceParameterBufferType, sizeof(VASliceParameterBufferH264), 1, NULL, &va_sp_param_buf_id[sid]);
CHECK_VASTATUS(va_status, "vaCreateBuffer(SliceParam)");
}
CHECK_SURF(va_surface_id[sid]);
VASliceParameterBufferH264 *slice_param_buf = NULL;
va_status = vaMapBuffer(va_dpy, va_sp_param_buf_id[sid], (void **)&slice_param_buf);
CHECK_VASTATUS(va_status, "vaMapBuffer(SliceParam)");
static int t2_first = 1;
if (slice_type == SLICE_TYPE_I) {
SetVASliceParameterBufferH264_Intra(slice_param_buf, t2_first);
t2_first = 0;
} else {
SetVASliceParameterBufferH264(slice_param_buf);
memcpy(&slice_param_buf->RefPicList0[0], &va_old_picture_h264, sizeof(VAPictureH264));
slice_param_buf->RefPicList0[0].flags = 0;
}
slice_param_buf->slice_data_bit_offset = 0;
slice_param_buf->slice_data_size = framesize;
va_status = vaUnmapBuffer(va_dpy, va_sp_param_buf_id[sid]);
CHECK_VASTATUS(va_status, "vaUnmapBuffer(SliceParam)");
CHECK_SURF(va_surface_id[sid]);
/* Set up slice data buffer and copy H.264 encoded data */
if (va_d_param_buf_id[sid] == VA_INVALID_ID) {
/* TODO use estimation matching framebuffer dimensions instead of this large value */
va_status = vaCreateBuffer(va_dpy, va_context_id, VASliceDataBufferType, 4177920, 1, NULL, &va_d_param_buf_id[sid]); /* 1080p size */
CHECK_VASTATUS(va_status, "vaCreateBuffer(SliceData)");
}
char *slice_data_buf;
va_status = vaMapBuffer(va_dpy, va_d_param_buf_id[sid], (void **)&slice_data_buf);
CHECK_VASTATUS(va_status, "vaMapBuffer(SliceData)");
memcpy(slice_data_buf, framedata, framesize);
CHECK_SURF(va_surface_id[sid]);
va_status = vaUnmapBuffer(va_dpy, va_d_param_buf_id[sid]);
CHECK_VASTATUS(va_status, "vaUnmapBuffer(SliceData)");
buffer_ids[0] = va_sp_param_buf_id[sid];
buffer_ids[1] = va_d_param_buf_id[sid];
CHECK_SURF(va_surface_id[sid]);
va_status = vaRenderPicture(va_dpy, va_context_id, buffer_ids, 2);
CHECK_VASTATUS(va_status, "vaRenderPicture");
va_status = vaEndPicture(va_dpy, va_context_id);
CHECK_VASTATUS(va_status, "vaEndPicture");
/* Prepare next one... */
int sid_new = (sid + 1) % SURFACE_NUM;
DebugLog(("%s: new Surface ID = %d\n", __FUNCTION__, sid_new));
va_status = vaBeginPicture(va_dpy, va_context_id, va_surface_id[sid_new]);
CHECK_VASTATUS(va_status, "vaBeginPicture");
/* Get decoded data */
va_status = vaSyncSurface(va_dpy, va_surface_id[sid]);
CHECK_VASTATUS(va_status, "vaSyncSurface");
CHECK_SURF(va_surface_id[sid]);
curr_surface = va_surface_id[sid];
sid = sid_new;
field_order_count += 2;
++frame_id;
if (frame_id > 15) {
frame_id = 0;
}
++num_frames;
memcpy(&va_old_picture_h264, &va_picture_h264, sizeof(VAPictureH264));
}
static void put_updated_rectangle(rfbClient *client, int x, int y, int width, int height, int f_width, int f_height, int first_for_frame)
{
if (curr_surface == VA_INVALID_ID) {
rfbClientErr("%s: called, but current surface is invalid\n", __FUNCTION__);
return;
}
VAStatus va_status;
if (client->outputWindow) {
/* use efficient vaPutSurface() method of putting the framebuffer on the screen */
if (first_for_frame) {
/* vaPutSurface() clears window contents outside the given destination rectangle => always update full screen. */
va_status = vaPutSurface(va_dpy, curr_surface, client->outputWindow, 0, 0, f_width, f_height, 0, 0, f_width, f_height, NULL, 0, VA_FRAME_PICTURE);
CHECK_VASTATUS(va_status, "vaPutSurface");
}
}
else if (client->frameBuffer) {
/* ... or copy the changed framebuffer region manually as a fallback */
VAImage decoded_image;
decoded_image.image_id = VA_INVALID_ID;
decoded_image.buf = VA_INVALID_ID;
va_status = vaDeriveImage(va_dpy, curr_surface, &decoded_image);
CHECK_VASTATUS(va_status, "vaDeriveImage");
if ((decoded_image.image_id == VA_INVALID_ID) || (decoded_image.buf == VA_INVALID_ID)) {
rfbClientErr("%s: vaDeriveImage() returned success but VA image is invalid (id: %d, buf: %d)\n", __FUNCTION__, decoded_image.image_id, decoded_image.buf);
}
nv12_to_rgba(decoded_image, client, x, y, width, height);
va_status = vaDestroyImage(va_dpy, decoded_image.image_id);
CHECK_VASTATUS(va_status, "vaDestroyImage");
}
}
static void SetVAPictureParameterBufferH264(VAPictureParameterBufferH264 *p, int width, int height)
{
int i;
unsigned int width_in_mbs = (width + 15) / 16;
unsigned int height_in_mbs = (height + 15) / 16;
memset(p, 0, sizeof(VAPictureParameterBufferH264));
p->picture_width_in_mbs_minus1 = width_in_mbs - 1;
p->picture_height_in_mbs_minus1 = height_in_mbs - 1;
p->num_ref_frames = 1;
p->seq_fields.value = 145;
p->pic_fields.value = 0x501;
for (i = 0; i < 16; i++) {
p->ReferenceFrames[i].flags = VA_PICTURE_H264_INVALID;
p->ReferenceFrames[i].picture_id = 0xffffffff;
}
}
static void SetVASliceParameterBufferH264(VASliceParameterBufferH264 *p)
{
int i;
memset(p, 0, sizeof(VASliceParameterBufferH264));
p->slice_data_size = 0;
p->slice_data_bit_offset = 64;
p->slice_alpha_c0_offset_div2 = 2;
p->slice_beta_offset_div2 = 2;
p->chroma_weight_l0_flag = 1;
p->chroma_weight_l0[0][0]=1;
p->chroma_offset_l0[0][0]=0;
p->chroma_weight_l0[0][1]=1;
p->chroma_offset_l0[0][1]=0;
p->luma_weight_l1_flag = 1;
p->chroma_weight_l1_flag = 1;
p->luma_weight_l0[0]=0x01;
for (i = 0; i < 32; i++) {
p->RefPicList0[i].flags = VA_PICTURE_H264_INVALID;
p->RefPicList1[i].flags = VA_PICTURE_H264_INVALID;
}
p->RefPicList1[0].picture_id = 0xffffffff;
}
static void SetVASliceParameterBufferH264_Intra(VASliceParameterBufferH264 *p, int first)
{
int i;
memset(p, 0, sizeof(VASliceParameterBufferH264));
p->slice_data_size = 0;
p->slice_data_bit_offset = 64;
p->slice_alpha_c0_offset_div2 = 2;
p->slice_beta_offset_div2 = 2;
p->slice_type = 2;
if (first) {
p->luma_weight_l0_flag = 1;
p->chroma_weight_l0_flag = 1;
p->luma_weight_l1_flag = 1;
p->chroma_weight_l1_flag = 1;
} else {
p->chroma_weight_l0_flag = 1;
p->chroma_weight_l0[0][0]=1;
p->chroma_offset_l0[0][0]=0;
p->chroma_weight_l0[0][1]=1;
p->chroma_offset_l0[0][1]=0;
p->luma_weight_l1_flag = 1;
p->chroma_weight_l1_flag = 1;
p->luma_weight_l0[0]=0x01;
}
for (i = 0; i < 32; i++) {
p->RefPicList0[i].flags = VA_PICTURE_H264_INVALID;
p->RefPicList1[i].flags = VA_PICTURE_H264_INVALID;
}
p->RefPicList1[0].picture_id = 0xffffffff;
p->RefPicList0[0].picture_id = 0xffffffff;
}
static void nv12_to_rgba(const VAImage vaImage, rfbClient *client, int ch_x, int ch_y, int ch_w, int ch_h)
{
DebugLog(("%s: converting region (%d, %d)-(%d, %d) from NV12->RGBA\n", __FUNCTION__, ch_x, ch_y, ch_w, ch_h));
VAStatus va_status;
uint8_t *nv12_buf;
va_status = vaMapBuffer(va_dpy, vaImage.buf, (void **)&nv12_buf);
CHECK_VASTATUS(va_status, "vaMapBuffer(DecodedData)");
/* adjust x, y, width, height of the affected area so
* x, y, width and height are always even.
*/
if (ch_x % 2) { --ch_x; ++ch_w; }
if (ch_y % 2) { --ch_y; ++ch_h; }
if ((ch_x + ch_w) % 2) { ++ch_w; }
if ((ch_y + ch_h) % 2) { ++ch_h; }
/* point nv12_buf and dst to upper left corner of changed area */
uint8_t *nv12_y = &nv12_buf[vaImage.offsets[0] + vaImage.pitches[0] * ch_y + ch_x];
uint8_t *nv12_uv = &nv12_buf[vaImage.offsets[1] + vaImage.pitches[1] * (ch_y / 2) + ch_x];
uint32_t *dst = &((uint32_t*)client->frameBuffer)[client->width * ch_y + ch_x];
/* TODO: optimize R, G, B calculation. Possible ways to do this:
* - use lookup tables
* - convert from floating point to integer arithmetic
* - use MMX/SSE to vectorize calculations
* - use GPU (VA VPP, shader...)
*/
int src_x, src_y;
for (src_y = 0; src_y < ch_h; src_y += 2) {
for (src_x = 0; src_x < ch_w; src_x += 2) {
uint8_t nv_u = nv12_uv[src_x];
uint8_t nv_v = nv12_uv[src_x + 1];
uint8_t nv_y[4] = { nv12_y[ src_x], nv12_y[ src_x + 1],
nv12_y[vaImage.pitches[0] + src_x], nv12_y[vaImage.pitches[0] + src_x + 1] };
int i;
for (i = 0; i < 4; ++i) {
double R = 1.164 * (nv_y[i] - 16) + 1.596 * (nv_v - 128);
double G = 1.164 * (nv_y[i] - 16) - 0.391 * (nv_u - 128) - 0.813 * (nv_v - 128);
double B = 1.164 * (nv_y[i] - 16) + 2.018 * (nv_u - 128);
/* clamp R, G, B values. For some Y, U, V combinations,
* the results of the above calculations fall outside of
* the range 0-255.
*/
if (R < 0.0) R = 0.0;
if (G < 0.0) G = 0.0;
if (B < 0.0) B = 0.0;
if (R > 255.0) R = 255.0;
if (G > 255.0) G = 255.0;
if (B > 255.0) B = 255.0;
dst[client->width * (i / 2) + src_x + (i % 2)] = 0
| ((unsigned int)(R + 0.5) << client->format.redShift)
| ((unsigned int)(G + 0.5) << client->format.greenShift)
| ((unsigned int)(B + 0.5) << client->format.blueShift);
}
}
nv12_y += 2 * vaImage.pitches[0];
nv12_uv += vaImage.pitches[1];
dst += 2 * client->width;
}
CHECK_SURF(va_surface_id[sid]);
va_status = vaUnmapBuffer(va_dpy, vaImage.buf);
CHECK_VASTATUS(va_status, "vaUnmapBuffer(DecodedData)");
}
#endif /* LIBVNCSERVER_CONFIG_LIBVA */
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