#include <libswscale/swscale.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
+#include <libavutil/frame.h>
}
#include <iostream>
AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
if (!d) {
- throw PixelFormatError ("lines()", _pixel_format);
+ throw PixelFormatError ("line_factor()", _pixel_format);
}
-
+
return pow (2.0f, d->log2_chroma_h);
}
/** @param n Component index.
- * @return Number of lines in the image for the given component.
+ * @return Number of samples (i.e. pixels, unless sub-sampled) in each direction for this component.
*/
-int
-Image::lines (int n) const
+dcp::Size
+Image::sample_size (int n) const
{
- return rint (ceil (static_cast<double>(size().height) / line_factor (n)));
+ int horizontal_factor = 1;
+ if (n > 0) {
+ AVPixFmtDescriptor const * d = av_pix_fmt_desc_get (_pixel_format);
+ if (!d) {
+ throw PixelFormatError ("sample_size()", _pixel_format);
+ }
+ horizontal_factor = pow (2.0f, d->log2_chroma_w);
+ }
+
+ return dcp::Size (
+ lrint (ceil (static_cast<double>(size().width) / horizontal_factor)),
+ lrint (ceil (static_cast<double>(size().height) / line_factor (n)))
+ );
}
-/** @return Number of components */
int
Image::components () const
{
throw PixelFormatError ("components()", _pixel_format);
}
+ return d->nb_components;
+}
+
+/** @return Number of planes */
+int
+Image::planes () const
+{
+ AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
+ if (!d) {
+ throw PixelFormatError ("planes()", _pixel_format);
+ }
+
if ((d->flags & PIX_FMT_PLANAR) == 0) {
return 1;
}
-
+
return d->nb_components;
}
sws_getCoefficients (lut[yuv_to_rgb]), 0,
0, 1 << 16, 1 << 16
);
-
+
+ AVPixFmtDescriptor const * desc = av_pix_fmt_desc_get (_pixel_format);
+ if (!desc) {
+ throw PixelFormatError ("crop_scale_window()", _pixel_format);
+ }
+
/* Prepare input data pointers with crop */
- uint8_t* scale_in_data[components()];
- for (int c = 0; c < components(); ++c) {
- scale_in_data[c] = data()[c] + int (rint (bytes_per_pixel(c) * crop.left)) + stride()[c] * (crop.top / line_factor(c));
+ uint8_t* scale_in_data[planes()];
+ for (int c = 0; c < planes(); ++c) {
+ /* To work out the crop in bytes, start by multiplying
+ the crop by the (average) bytes per pixel. Then
+ round down so that we don't crop a subsampled pixel until
+ we've cropped all of its Y-channel pixels.
+ */
+ int const x = lrintf (bytes_per_pixel(c) * crop.left) & ~ ((int) desc->log2_chroma_w);
+ scale_in_data[c] = data()[c] + x + stride()[c] * (crop.top / line_factor(c));
}
/* Corner of the image within out_size */
Position<int> const corner ((out_size.width - inter_size.width) / 2, (out_size.height - inter_size.height) / 2);
- uint8_t* scale_out_data[out->components()];
- for (int c = 0; c < out->components(); ++c) {
- scale_out_data[c] = out->data()[c] + int (rint (out->bytes_per_pixel(c) * corner.x)) + out->stride()[c] * corner.y;
+ uint8_t* scale_out_data[out->planes()];
+ for (int c = 0; c < out->planes(); ++c) {
+ scale_out_data[c] = out->data()[c] + lrintf (out->bytes_per_pixel(c) * corner.x) + out->stride()[c] * corner.y;
}
sws_scale (
sws_freeContext (scale_context);
- return out;
+ return out;
}
shared_ptr<Image>
sws_getCoefficients (lut[yuv_to_rgb]), 0,
0, 1 << 16, 1 << 16
);
-
+
sws_scale (
scale_context,
data(), stride(),
return scaled;
}
-shared_ptr<Image>
-Image::crop (Crop crop, bool aligned) const
-{
- dcp::Size cropped_size = crop.apply (size ());
- shared_ptr<Image> out (new Image (pixel_format(), cropped_size, aligned));
-
- for (int c = 0; c < components(); ++c) {
- int const crop_left_in_bytes = bytes_per_pixel(c) * crop.left;
- /* bytes_per_pixel() could be a fraction; in this case the stride will be rounded
- up, and we need to make sure that we copy over the width (up to the stride)
- rather than short of the width; hence the ceil() here.
- */
- int const cropped_width_in_bytes = ceil (bytes_per_pixel(c) * cropped_size.width);
-
- /* Start of the source line, cropped from the top but not the left */
- uint8_t* in_p = data()[c] + (crop.top / out->line_factor(c)) * stride()[c];
- uint8_t* out_p = out->data()[c];
-
- for (int y = 0; y < out->lines(c); ++y) {
- memcpy (out_p, in_p + crop_left_in_bytes, cropped_width_in_bytes);
- in_p += stride()[c];
- out_p += out->stride()[c];
- }
- }
-
- return out;
-}
-
/** Blacken a YUV image whose bits per pixel is rounded up to 16 */
void
Image::yuv_16_black (uint16_t v, bool alpha)
{
- memset (data()[0], 0, lines(0) * stride()[0]);
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
for (int i = 1; i < 3; ++i) {
int16_t* p = reinterpret_cast<int16_t*> (data()[i]);
- for (int y = 0; y < lines(i); ++y) {
+ int const lines = sample_size(i).height;
+ for (int y = 0; y < lines; ++y) {
/* We divide by 2 here because we are writing 2 bytes at a time */
for (int x = 0; x < line_size()[i] / 2; ++x) {
p[x] = v;
}
if (alpha) {
- memset (data()[3], 0, lines(3) * stride()[3]);
+ memset (data()[3], 0, sample_size(3).height * stride()[3]);
}
}
static uint16_t const ten_bit_uv = (1 << 9) - 1;
/* U/V black value for 16-bit colour */
static uint16_t const sixteen_bit_uv = (1 << 15) - 1;
-
+
switch (_pixel_format) {
case PIX_FMT_YUV420P:
case PIX_FMT_YUV422P:
case PIX_FMT_YUV444P:
case PIX_FMT_YUV411P:
- memset (data()[0], 0, lines(0) * stride()[0]);
- memset (data()[1], eight_bit_uv, lines(1) * stride()[1]);
- memset (data()[2], eight_bit_uv, lines(2) * stride()[2]);
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
+ memset (data()[1], eight_bit_uv, sample_size(1).height * stride()[1]);
+ memset (data()[2], eight_bit_uv, sample_size(2).height * stride()[2]);
break;
case PIX_FMT_YUVJ420P:
case PIX_FMT_YUVJ422P:
case PIX_FMT_YUVJ444P:
- memset (data()[0], 0, lines(0) * stride()[0]);
- memset (data()[1], eight_bit_uv + 1, lines(1) * stride()[1]);
- memset (data()[2], eight_bit_uv + 1, lines(2) * stride()[2]);
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
+ memset (data()[1], eight_bit_uv + 1, sample_size(1).height * stride()[1]);
+ memset (data()[2], eight_bit_uv + 1, sample_size(2).height * stride()[2]);
break;
case PIX_FMT_YUV422P9LE:
case PIX_FMT_YUV444P9BE:
yuv_16_black (swap_16 (nine_bit_uv), false);
break;
-
+
case PIX_FMT_YUV422P10LE:
case PIX_FMT_YUV444P10LE:
yuv_16_black (ten_bit_uv, false);
case PIX_FMT_YUV444P16LE:
yuv_16_black (sixteen_bit_uv, false);
break;
-
+
case PIX_FMT_YUV444P10BE:
case PIX_FMT_YUV422P10BE:
yuv_16_black (swap_16 (ten_bit_uv), false);
case AV_PIX_FMT_YUVA444P9BE:
yuv_16_black (swap_16 (nine_bit_uv), true);
break;
-
+
case AV_PIX_FMT_YUVA420P9LE:
case AV_PIX_FMT_YUVA422P9LE:
case AV_PIX_FMT_YUVA444P9LE:
yuv_16_black (nine_bit_uv, true);
break;
-
+
case AV_PIX_FMT_YUVA420P10BE:
case AV_PIX_FMT_YUVA422P10BE:
case AV_PIX_FMT_YUVA444P10BE:
yuv_16_black (swap_16 (ten_bit_uv), true);
break;
-
+
case AV_PIX_FMT_YUVA420P10LE:
case AV_PIX_FMT_YUVA422P10LE:
case AV_PIX_FMT_YUVA444P10LE:
yuv_16_black (ten_bit_uv, true);
break;
-
+
case AV_PIX_FMT_YUVA420P16BE:
case AV_PIX_FMT_YUVA422P16BE:
case AV_PIX_FMT_YUVA444P16BE:
yuv_16_black (swap_16 (sixteen_bit_uv), true);
break;
-
+
case AV_PIX_FMT_YUVA420P16LE:
case AV_PIX_FMT_YUVA422P16LE:
case AV_PIX_FMT_YUVA444P16LE:
case PIX_FMT_RGB555LE:
case PIX_FMT_RGB48LE:
case PIX_FMT_RGB48BE:
- memset (data()[0], 0, lines(0) * stride()[0]);
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
break;
case PIX_FMT_UYVY422:
{
- int const Y = lines(0);
+ int const Y = sample_size(0).height;
int const X = line_size()[0];
uint8_t* p = data()[0];
for (int y = 0; y < Y; ++y) {
throw PixelFormatError ("make_transparent()", _pixel_format);
}
- memset (data()[0], 0, lines(0) * stride()[0]);
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
}
void
tp[0] = op[0] * alpha + tp[0] * (1 - alpha);
tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
-
+
tp += this_bpp;
op += other_bpp;
}
tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
tp[3] = op[3] * alpha + tp[3] * (1 - alpha);
-
+
tp += this_bpp;
op += other_bpp;
}
tp[1] = op[0] * alpha + tp[1] * (1 - alpha);
tp[3] = op[1] * alpha + tp[3] * (1 - alpha);
tp[5] = op[2] * alpha + tp[5] * (1 - alpha);
-
+
tp += this_bpp;
op += other_bpp;
}
DCPOMATIC_ASSERT (false);
}
}
-
+
void
Image::copy (shared_ptr<const Image> other, Position<int> position)
{
uint8_t * const op = other->data()[0] + oy * other->stride()[0];
memcpy (tp, op, N * 3);
}
-}
+}
void
Image::read_from_socket (shared_ptr<Socket> socket)
{
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
uint8_t* p = data()[i];
- for (int y = 0; y < lines(i); ++y) {
+ int const lines = sample_size(i).height;
+ for (int y = 0; y < lines; ++y) {
socket->read (p, line_size()[i]);
p += stride()[i];
}
void
Image::write_to_socket (shared_ptr<Socket> socket) const
{
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
uint8_t* p = data()[i];
- for (int y = 0; y < lines(i); ++y) {
+ int const lines = sample_size(i).height;
+ for (int y = 0; y < lines; ++y) {
socket->write (p, line_size()[i]);
p += stride()[i];
}
}
}
-
float
Image::bytes_per_pixel (int c) const
{
AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
if (!d) {
- throw PixelFormatError ("lines()", _pixel_format);
+ throw PixelFormatError ("bytes_per_pixel()", _pixel_format);
}
- if (c >= components()) {
+ if (c >= planes()) {
return 0;
}
if (d->nb_components > 3) {
bpp[3] = floor ((d->comp[3].depth_minus1 + 1 + 7) / 8) / pow (2.0f, d->log2_chroma_w);
}
-
+
if ((d->flags & PIX_FMT_PLANAR) == 0) {
/* Not planar; sum them up */
return bpp[0] + bpp[1] + bpp[2] + bpp[3];
{
_data = (uint8_t **) wrapped_av_malloc (4 * sizeof (uint8_t *));
_data[0] = _data[1] = _data[2] = _data[3] = 0;
-
+
_line_size = (int *) wrapped_av_malloc (4 * sizeof (int));
_line_size[0] = _line_size[1] = _line_size[2] = _line_size[3] = 0;
-
+
_stride = (int *) wrapped_av_malloc (4 * sizeof (int));
_stride[0] = _stride[1] = _stride[2] = _stride[3] = 0;
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
_line_size[i] = ceil (_size.width * bytes_per_pixel(i));
_stride[i] = stride_round_up (i, _line_size, _aligned ? 32 : 1);
so I'll just over-allocate by 32 bytes and have done with it. Empirical
testing suggests that it works.
*/
- _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * lines (i) + 32);
+ _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * sample_size(i).height + 32);
}
}
{
allocate ();
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
uint8_t* p = _data[i];
uint8_t* q = other._data[i];
- for (int j = 0; j < lines(i); ++j) {
+ int const lines = sample_size(i).height;
+ for (int j = 0; j < lines; ++j) {
memcpy (p, q, _line_size[i]);
p += stride()[i];
q += other.stride()[i];
{
allocate ();
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
uint8_t* p = _data[i];
uint8_t* q = frame->data[i];
- for (int j = 0; j < lines(i); ++j) {
+ int const lines = sample_size(i).height;
+ for (int j = 0; j < lines; ++j) {
memcpy (p, q, _line_size[i]);
p += stride()[i];
/* AVFrame's linesize is what we call `stride' */
{
allocate ();
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
DCPOMATIC_ASSERT (line_size()[i] == other->line_size()[i]);
uint8_t* p = _data[i];
uint8_t* q = other->data()[i];
- for (int j = 0; j < lines(i); ++j) {
+ int const lines = sample_size(i).height;
+ for (int j = 0; j < lines; ++j) {
memcpy (p, q, line_size()[i]);
p += stride()[i];
q += other->stride()[i];
/** Destroy a Image */
Image::~Image ()
{
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
av_free (_data[i]);
}
return _data;
}
-int *
+int const *
Image::line_size () const
{
return _line_size;
bool
operator== (Image const & a, Image const & b)
{
- if (a.components() != b.components() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
+ if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
return false;
}
- for (int c = 0; c < a.components(); ++c) {
- if (a.lines(c) != b.lines(c) || a.line_size()[c] != b.line_size()[c] || a.stride()[c] != b.stride()[c]) {
+ for (int c = 0; c < a.planes(); ++c) {
+ if (a.sample_size(c).height != b.sample_size(c).height || a.line_size()[c] != b.line_size()[c] || a.stride()[c] != b.stride()[c]) {
return false;
}
uint8_t* p = a.data()[c];
uint8_t* q = b.data()[c];
- for (int y = 0; y < a.lines(c); ++y) {
+ int const lines = a.sample_size(c).height;
+ for (int y = 0; y < lines; ++y) {
if (memcmp (p, q, a.line_size()[c]) != 0) {
return false;
}
return true;
}
+/** Fade the image.
+ * @param f Amount to fade by; 0 is black, 1 is no fade.
+ */
void
Image::fade (float f)
{
/* 8-bit */
for (int c = 0; c < 3; ++c) {
uint8_t* p = data()[c];
- for (int y = 0; y < lines(c); ++y) {
+ int const lines = sample_size(c).height;
+ for (int y = 0; y < lines; ++y) {
uint8_t* q = p;
for (int x = 0; x < line_size()[c]; ++x) {
*q = int (float (*q) * f);
case AV_PIX_FMT_YUVA420P10LE:
case AV_PIX_FMT_YUVA422P10LE:
case AV_PIX_FMT_YUVA444P10LE:
+ case AV_PIX_FMT_RGB48LE:
/* 16-bit little-endian */
for (int c = 0; c < 3; ++c) {
int const stride_pixels = stride()[c] / 2;
int const line_size_pixels = line_size()[c] / 2;
uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
- for (int y = 0; y < lines(c); ++y) {
+ int const lines = sample_size(c).height;
+ for (int y = 0; y < lines; ++y) {
uint16_t* q = p;
for (int x = 0; x < line_size_pixels; ++x) {
*q = int (float (*q) * f);
case AV_PIX_FMT_YUVA420P16BE:
case AV_PIX_FMT_YUVA422P16BE:
case AV_PIX_FMT_YUVA444P16BE:
+ case AV_PIX_FMT_RGB48BE:
/* 16-bit big-endian */
for (int c = 0; c < 3; ++c) {
int const stride_pixels = stride()[c] / 2;
int const line_size_pixels = line_size()[c] / 2;
uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
- for (int y = 0; y < lines(c); ++y) {
+ int const lines = sample_size(c).height;
+ for (int y = 0; y < lines; ++y) {
uint16_t* q = p;
for (int x = 0; x < line_size_pixels; ++x) {
*q = swap_16 (int (float (swap_16 (*q)) * f));
case PIX_FMT_UYVY422:
{
- int const Y = lines(0);
+ int const Y = sample_size(0).height;
int const X = line_size()[0];
uint8_t* p = data()[0];
for (int y = 0; y < Y; ++y) {