+
+bool
+operator== (Image const & a, Image const & b)
+{
+ if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
+ return false;
+ }
+
+ 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];
+ 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;
+ }
+
+ p += a.stride()[c];
+ q += b.stride()[c];
+ }
+ }
+
+ return true;
+}
+
+/** Fade the image.
+ * @param f Amount to fade by; 0 is black, 1 is no fade.
+ */
+void
+Image::fade (float f)
+{
+ switch (_pixel_format) {
+ case AV_PIX_FMT_YUV420P:
+ case AV_PIX_FMT_YUV422P:
+ case AV_PIX_FMT_YUV444P:
+ case AV_PIX_FMT_YUV411P:
+ case AV_PIX_FMT_YUVJ420P:
+ case AV_PIX_FMT_YUVJ422P:
+ case AV_PIX_FMT_YUVJ444P:
+ case AV_PIX_FMT_RGB24:
+ case AV_PIX_FMT_ARGB:
+ case AV_PIX_FMT_RGBA:
+ case AV_PIX_FMT_ABGR:
+ case AV_PIX_FMT_BGRA:
+ case AV_PIX_FMT_RGB555LE:
+ /* 8-bit */
+ for (int c = 0; c < 3; ++c) {
+ uint8_t* p = data()[c];
+ 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);
+ ++q;
+ }
+ p += stride()[c];
+ }
+ }
+ break;
+
+ case AV_PIX_FMT_YUV422P9LE:
+ case AV_PIX_FMT_YUV444P9LE:
+ case AV_PIX_FMT_YUV422P10LE:
+ case AV_PIX_FMT_YUV444P10LE:
+ case AV_PIX_FMT_YUV422P16LE:
+ case AV_PIX_FMT_YUV444P16LE:
+ case AV_PIX_FMT_YUVA420P9LE:
+ case AV_PIX_FMT_YUVA422P9LE:
+ case AV_PIX_FMT_YUVA444P9LE:
+ case AV_PIX_FMT_YUVA420P10LE:
+ case AV_PIX_FMT_YUVA422P10LE:
+ case AV_PIX_FMT_YUVA444P10LE:
+ case AV_PIX_FMT_RGB48LE:
+ case AV_PIX_FMT_XYZ12LE:
+ /* 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]);
+ 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);
+ ++q;
+ }
+ p += stride_pixels;
+ }
+ }
+ break;
+
+ case AV_PIX_FMT_YUV422P9BE:
+ case AV_PIX_FMT_YUV444P9BE:
+ case AV_PIX_FMT_YUV444P10BE:
+ case AV_PIX_FMT_YUV422P10BE:
+ case AV_PIX_FMT_YUVA420P9BE:
+ case AV_PIX_FMT_YUVA422P9BE:
+ case AV_PIX_FMT_YUVA444P9BE:
+ case AV_PIX_FMT_YUVA420P10BE:
+ case AV_PIX_FMT_YUVA422P10BE:
+ case AV_PIX_FMT_YUVA444P10BE:
+ 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]);
+ 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));
+ ++q;
+ }
+ p += stride_pixels;
+ }
+ }
+ break;
+
+ case AV_PIX_FMT_UYVY422:
+ {
+ 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) {
+ for (int x = 0; x < X; ++x) {
+ *p = int (float (*p) * f);
+ ++p;
+ }
+ }
+ break;
+ }
+
+ default:
+ throw PixelFormatError ("fade()", _pixel_format);
+ }
+}