void ScaleDisplayByAspectRatio(gfx::IntSize& aDisplay, float aAspectRatio) {
if (aAspectRatio > 1.0) {
// Increase the intrinsic width
aDisplay.width = ConditionDimension(aAspectRatio * aDisplay.width);
} else {
// Increase the intrinsic height
aDisplay.height = ConditionDimension(aDisplay.height / aAspectRatio);
}
}
void nsMediaDecoder::Invalidate()
{
if (!mElement)
return;
nsIFrame* frame = mElement->GetPrimaryFrame();
PRBool invalidateFrame = PR_FALSE;
{
nsAutoLock lock(mVideoUpdateLock);
// Get mImageContainerSizeChanged while holding the lock.
invalidateFrame = mImageContainerSizeChanged;
mImageContainerSizeChanged = PR_FALSE;
if (mSizeChanged) {
nsIntSize scaledSize(mRGBWidth, mRGBHeight);
// Apply the aspect ratio to produce the intrinsic size we report
// to the element.
if (mPixelAspectRatio > 1.0) {
// Increase the intrinsic width
scaledSize.width =
ConditionDimension(mPixelAspectRatio*scaledSize.width, scaledSize.width);
} else {
// Increase the intrinsic height
scaledSize.height =
ConditionDimension(scaledSize.height/mPixelAspectRatio, scaledSize.height);
}
mElement->UpdateMediaSize(scaledSize);
mSizeChanged = PR_FALSE;
if (frame) {
nsPresContext* presContext = frame->PresContext();
nsIPresShell *presShell = presContext->PresShell();
presShell->FrameNeedsReflow(frame,
nsIPresShell::eStyleChange,
NS_FRAME_IS_DIRTY);
}
}
}
if (frame) {
nsRect contentRect = frame->GetContentRect() - frame->GetPosition();
if (invalidateFrame) {
frame->Invalidate(contentRect);
} else {
frame->InvalidateLayer(contentRect, nsDisplayItem::TYPE_VIDEO);
}
}
#ifdef MOZ_SVG
nsSVGEffects::InvalidateDirectRenderingObservers(mElement);
#endif
}
/* static */ bool
H264::DecodeSPS(const mozilla::MediaByteBuffer* aSPS, SPSData& aDest)
{
MOZ_ASSERT(aSPS);
BitReader br(aSPS);
int32_t lastScale;
int32_t nextScale;
int32_t deltaScale;
aDest.profile_idc = br.ReadBits(8);
aDest.constraint_set0_flag = br.ReadBit();
aDest.constraint_set1_flag = br.ReadBit();
aDest.constraint_set2_flag = br.ReadBit();
aDest.constraint_set3_flag = br.ReadBit();
aDest.constraint_set4_flag = br.ReadBit();
aDest.constraint_set5_flag = br.ReadBit();
br.ReadBits(2); // reserved_zero_2bits
aDest.level_idc = br.ReadBits(8);
aDest.seq_parameter_set_id = br.ReadUE();
if (aDest.profile_idc == 100 || aDest.profile_idc == 110 ||
aDest.profile_idc == 122 || aDest.profile_idc == 244 ||
aDest.profile_idc == 44 || aDest.profile_idc == 83 ||
aDest.profile_idc == 86 || aDest.profile_idc == 118 ||
aDest.profile_idc == 128 || aDest.profile_idc == 138 ||
aDest.profile_idc == 139 || aDest.profile_idc == 134) {
if ((aDest.chroma_format_idc = br.ReadUE()) == 3) {
aDest.separate_colour_plane_flag = br.ReadBit();
}
br.ReadUE(); // bit_depth_luma_minus8
br.ReadUE(); // bit_depth_chroma_minus8
br.ReadBit(); // qpprime_y_zero_transform_bypass_flag
if (br.ReadBit()) { // seq_scaling_matrix_present_flag
for (int idx = 0; idx < ((aDest.chroma_format_idc != 3) ? 8 : 12); ++idx) {
if (br.ReadBit()) { // Scaling list present
lastScale = nextScale = 8;
int sl_n = (idx < 6) ? 16 : 64;
for (int sl_i = 0; sl_i < sl_n; sl_i++) {
if (nextScale) {
deltaScale = br.ReadSE();
nextScale = (lastScale + deltaScale + 256) % 256;
}
lastScale = (nextScale == 0) ? lastScale : nextScale;
}
}
}
}
} else if (aDest.profile_idc == 183) {
aDest.chroma_format_idc = 0;
} else {
// default value if chroma_format_idc isn't set.
aDest.chroma_format_idc = 1;
}
aDest.log2_max_frame_num = br.ReadUE() + 4;
aDest.pic_order_cnt_type = br.ReadUE();
if (aDest.pic_order_cnt_type == 0) {
aDest.log2_max_pic_order_cnt_lsb = br.ReadUE() + 4;
} else if (aDest.pic_order_cnt_type == 1) {
aDest.delta_pic_order_always_zero_flag = br.ReadBit();
aDest.offset_for_non_ref_pic = br.ReadSE();
aDest.offset_for_top_to_bottom_field = br.ReadSE();
uint32_t num_ref_frames_in_pic_order_cnt_cycle = br.ReadUE();
for (uint32_t i = 0; i < num_ref_frames_in_pic_order_cnt_cycle; i++) {
br.ReadSE(); // offset_for_ref_frame[i]
}
}
aDest.max_num_ref_frames = br.ReadUE();
aDest.gaps_in_frame_num_allowed_flag = br.ReadBit();
aDest.pic_width_in_mbs = br.ReadUE() + 1;
aDest.pic_height_in_map_units = br.ReadUE() + 1;
aDest.frame_mbs_only_flag = br.ReadBit();
if (!aDest.frame_mbs_only_flag) {
aDest.pic_height_in_map_units *= 2;
aDest.mb_adaptive_frame_field_flag = br.ReadBit();
}
br.ReadBit(); // direct_8x8_inference_flag
aDest.frame_cropping_flag = br.ReadBit();
if (aDest.frame_cropping_flag) {
aDest.frame_crop_left_offset = br.ReadUE();
aDest.frame_crop_right_offset = br.ReadUE();
aDest.frame_crop_top_offset = br.ReadUE();
aDest.frame_crop_bottom_offset = br.ReadUE();
}
aDest.sample_ratio = 1.0f;
aDest.vui_parameters_present_flag = br.ReadBit();
if (aDest.vui_parameters_present_flag) {
vui_parameters(br, aDest);
}
// Calculate common values.
uint8_t ChromaArrayType =
aDest.separate_colour_plane_flag ? 0 : aDest.chroma_format_idc;
// Calculate width.
uint32_t CropUnitX = 1;
uint32_t SubWidthC = aDest.chroma_format_idc == 3 ? 1 : 2;
if (ChromaArrayType != 0) {
CropUnitX = SubWidthC;
}
// Calculate Height
uint32_t CropUnitY = 2 - aDest.frame_mbs_only_flag;
uint32_t SubHeightC = aDest.chroma_format_idc <= 1 ? 2 : 1;
if (ChromaArrayType != 0) {
CropUnitY *= SubHeightC;
}
uint32_t width = aDest.pic_width_in_mbs * 16;
uint32_t height = aDest.pic_height_in_map_units * 16;
if (aDest.frame_crop_left_offset <= std::numeric_limits<int32_t>::max() / 4 / CropUnitX &&
aDest.frame_crop_right_offset <= std::numeric_limits<int32_t>::max() / 4 / CropUnitX &&
aDest.frame_crop_top_offset <= std::numeric_limits<int32_t>::max() / 4 / CropUnitY &&
aDest.frame_crop_bottom_offset <= std::numeric_limits<int32_t>::max() / 4 / CropUnitY &&
(aDest.frame_crop_left_offset + aDest.frame_crop_right_offset) * CropUnitX < width &&
(aDest.frame_crop_top_offset + aDest.frame_crop_bottom_offset) * CropUnitY < height) {
aDest.crop_left = aDest.frame_crop_left_offset * CropUnitX;
aDest.crop_right = aDest.frame_crop_right_offset * CropUnitX;
aDest.crop_top = aDest.frame_crop_top_offset * CropUnitY;
aDest.crop_bottom = aDest.frame_crop_bottom_offset * CropUnitY;
} else {
// Nonsensical value, ignore them.
aDest.crop_left = aDest.crop_right = aDest.crop_top = aDest.crop_bottom = 0;
}
aDest.pic_width = width - aDest.crop_left - aDest.crop_right;
aDest.pic_height = height - aDest.crop_top - aDest.crop_bottom;
aDest.interlaced = !aDest.frame_mbs_only_flag;
// Determine display size.
if (aDest.sample_ratio > 1.0) {
// Increase the intrinsic width
aDest.display_width =
ConditionDimension(aDest.pic_width * aDest.sample_ratio);
aDest.display_height = aDest.pic_height;
} else {
// Increase the intrinsic height
aDest.display_width = aDest.pic_width;
aDest.display_height =
ConditionDimension(aDest.pic_height / aDest.sample_ratio);
}
return true;
}