4 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include "interlacemodes.h"
28 #include "mwindow.inc"
30 #include "videodevice.inc"
31 #include "mainerror.h"
36 FilePNG::FilePNG(Asset *asset, File *file)
37 : FileList(asset, file, "PNGLIST", ".png", FILE_PNG, FILE_PNG_LIST)
48 int FilePNG::check_sig(Asset *asset)
50 FILE *stream = fopen(asset->path, "rb");
55 //printf("FilePNG::check_sig 1\n");
57 (void)fread(test, 16, 1, stream);
60 // if(png_sig_cmp((unsigned char*)test, 0, 8))
61 if(png_check_sig((unsigned char*)test, 8))
63 //printf("FilePNG::check_sig 1\n");
67 if(test[0] == 'P' && test[1] == 'N' && test[2] == 'G' &&
68 test[3] == 'L' && test[4] == 'I' && test[5] == 'S' && test[6] == 'T')
70 //printf("FilePNG::check_sig 1\n");
79 void FilePNG::get_parameters(BC_WindowBase *parent_window,
80 Asset *asset, BC_WindowBase* &format_window,
81 int audio_options, int video_options, EDL *edl)
85 PNGConfigVideo *window = new PNGConfigVideo(parent_window, asset);
86 format_window = window;
87 window->create_objects();
96 int FilePNG::can_copy_from(Asset *asset, int64_t position)
98 if(asset->format == FILE_PNG ||
99 asset->format == FILE_PNG_LIST)
106 int FilePNG::colormodel_supported(int colormodel)
108 if( ((colormodel == BC_RGBA8888) && (native_cmodel == BC_RGBA16161616)) ||
109 ((colormodel == BC_RGB161616) && (native_cmodel == BC_RGBA16161616)) ||
110 (colormodel == BC_RGB888) || (colormodel == BC_RGBA8888) )
112 if( (colormodel == BC_RGB161616) && (native_cmodel == BC_RGBA8888) )
114 if( native_cmodel >= 0 )
115 return native_cmodel;
116 return asset->png_use_alpha ? BC_RGBA8888 : BC_RGB888;
120 int FilePNG::get_best_colormodel(Asset *asset, int driver)
122 if(asset->png_use_alpha)
131 int FilePNG::read_frame_header(char *path)
140 if(!(stream = fopen(path, "rb")))
142 eprintf("Error while opening \"%s\" for reading. \n%m\n", asset->path);
148 png_infop end_info = 0;
149 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
150 info_ptr = png_create_info_struct(png_ptr);
151 png_init_io(png_ptr, stream);
154 png_read_info(png_ptr, info_ptr);
156 asset->width = png_get_image_width(png_ptr, info_ptr);
157 asset->height = png_get_image_height(png_ptr, info_ptr);
158 asset->interlace_mode = ILACE_MODE_NOTINTERLACED;
159 color_type = png_get_color_type(png_ptr, info_ptr);
160 color_depth = png_get_bit_depth(png_ptr,info_ptr);
162 png_get_tRNS(png_ptr, info_ptr, NULL, &num_trans, NULL);
163 native_cmodel = color_depth == 16 ?
164 ((color_type & PNG_COLOR_MASK_ALPHA) ?
165 BC_RGBA16161616 : BC_RGB161616) :
166 ((color_type & PNG_COLOR_MASK_ALPHA) || (num_trans > 0) ?
167 BC_RGBA8888 : BC_RGB888);
168 asset->png_use_alpha = BC_CModels::has_alpha(native_cmodel) ? 1 : 0;
170 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
178 static void read_function(png_structp png_ptr,
182 VFrame *input = (VFrame*)png_get_io_ptr(png_ptr);
184 memcpy(data, input->get_data() + input->get_compressed_size(), length);
185 input->set_compressed_size(input->get_compressed_size() + length);
188 static void write_function(png_structp png_ptr, png_bytep data, png_uint_32 length)
190 VFrame *output = (VFrame*)png_get_io_ptr(png_ptr);
191 long total_length = output->get_compressed_size() + length;
192 if(output->get_compressed_allocated() < total_length) {
193 long new_length = 2 * (output->get_compressed_allocated() + length);
194 output->allocate_compressed_data(new_length);
196 memcpy(output->get_data() + output->get_compressed_size(), data, length);
197 output->set_compressed_size(total_length);
200 static void flush_function(png_structp png_ptr)
205 int FilePNG::write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit)
207 PNGUnit *png_unit = (PNGUnit*)unit;
208 png_structp png_ptr = 0;
209 png_infop info_ptr = 0;
210 VFrame *output_frame;
212 data->set_compressed_size(0);
213 //printf("FilePNG::write_frame 1\n");
214 native_cmodel = asset->png_use_alpha ? BC_RGBA8888 : BC_RGB888;
215 if(frame->get_color_model() != native_cmodel)
217 if(!png_unit->temp_frame) png_unit->temp_frame =
218 new VFrame(asset->width, asset->height, native_cmodel, 0);
220 png_unit->temp_frame->transfer_from(frame);
221 output_frame = png_unit->temp_frame;
224 output_frame = frame;
226 //printf("FilePNG::write_frame 1\n");
227 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
229 if( !setjmp(png_jmpbuf(png_ptr)) ) {
230 info_ptr = png_create_info_struct(png_ptr);
231 png_set_write_fn(png_ptr, data,
232 (png_rw_ptr)write_function, (png_flush_ptr)flush_function);
233 png_set_compression_level(png_ptr, 5);
235 png_set_IHDR(png_ptr, info_ptr, asset->width, asset->height, 8,
236 asset->png_use_alpha ? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB,
237 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
238 png_write_info(png_ptr, info_ptr);
239 png_write_image(png_ptr, output_frame->get_rows());
240 png_write_end(png_ptr, info_ptr);
243 png_destroy_write_struct(&png_ptr, &info_ptr);
246 char error[256]; png_error(png_ptr, error);
247 fprintf(stderr, "FilePNG::write_frame failed: %s\n", error);
249 //printf("FilePNG::write_frame 3 %d\n", data->get_compressed_size());
253 int FilePNG::read_frame(VFrame *output, VFrame *input)
257 png_infop end_info = 0;
262 int size = input->get_compressed_size();
263 input->set_compressed_size(0);
265 //printf("FilePNG::read_frame 1 %d %d\n", native_cmodel, output->get_color_model());
266 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
267 info_ptr = png_create_info_struct(png_ptr);
268 png_set_read_fn(png_ptr, input, (png_rw_ptr)read_function);
269 png_read_info(png_ptr, info_ptr);
271 int png_color_type = png_get_color_type(png_ptr, info_ptr);
272 if( png_color_type == PNG_COLOR_TYPE_GRAY ||
273 png_color_type == PNG_COLOR_TYPE_GRAY_ALPHA )
274 png_set_gray_to_rgb(png_ptr);
276 colormodel = output->get_color_model();
277 color_type = png_get_color_type(png_ptr, info_ptr);
278 color_depth = png_get_bit_depth(png_ptr,info_ptr);
281 png_get_tRNS(png_ptr, info_ptr, NULL, &num_trans, NULL);
283 native_cmodel = color_depth == 16 ?
284 ((color_type & PNG_COLOR_MASK_ALPHA) ?
285 BC_RGBA16161616 : BC_RGB161616) :
286 ((color_type & PNG_COLOR_MASK_ALPHA) || (num_trans > 0) ?
287 BC_RGBA8888 : BC_RGB888);
289 if( ((native_cmodel == BC_RGBA16161616) || (native_cmodel == BC_RGB161616)) &&
290 ((colormodel == BC_RGBA8888) || (colormodel == BC_RGB888)) )
291 png_set_strip_16(png_ptr);
293 // If we're dropping the alpha channel
294 if( !BC_CModels::has_alpha(colormodel) && BC_CModels::has_alpha(native_cmodel) ) {
295 png_color_16 my_background;
296 png_color_16p image_background;
297 memset(&my_background,0,sizeof(png_color_16));
298 // use the background color of the image
299 if( png_get_bKGD(png_ptr, info_ptr, &image_background) )
300 png_set_background(png_ptr, image_background, PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
302 // otherwise, use black
303 png_set_background(png_ptr, &my_background, PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
305 else if( BC_CModels::has_alpha(colormodel) && !BC_CModels::has_alpha(native_cmodel) )
306 // If we're adding the alpha channel, alpha = max pixel value
307 png_set_add_alpha(png_ptr, BC_CModels::calculate_max(colormodel), PNG_FILLER_AFTER);
310 if( (color_depth == 16) &&
311 ((colormodel == BC_RGBA16161616) || (colormodel == BC_RGB161616)) )
312 png_set_swap(png_ptr);
314 if( !(color_type & PNG_COLOR_MASK_COLOR) )
315 png_set_gray_to_rgb(png_ptr);
317 if( color_type & PNG_COLOR_MASK_PALETTE )
318 png_set_palette_to_rgb(png_ptr);
320 if( color_depth <= 8 )
321 png_set_expand(png_ptr);
324 png_read_image(png_ptr, output->get_rows());
326 //printf("FilePNG::read_frame 3\n");
327 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
328 input->set_compressed_size(size);
329 //printf("FilePNG::read_frame 4\n");
333 FrameWriterUnit* FilePNG::new_writer_unit(FrameWriter *writer)
335 return new PNGUnit(this, writer);
349 PNGUnit::PNGUnit(FilePNG *file, FrameWriter *writer)
350 : FrameWriterUnit(writer)
357 if(temp_frame) delete temp_frame;
368 PNGConfigVideo::PNGConfigVideo(BC_WindowBase *parent_window, Asset *asset)
369 : BC_Window(_(PROGRAM_NAME ": Video Compression"),
370 parent_window->get_abs_cursor_x(1),
371 parent_window->get_abs_cursor_y(1),
375 this->parent_window = parent_window;
379 PNGConfigVideo::~PNGConfigVideo()
383 void PNGConfigVideo::create_objects()
385 lock_window("PNGConfigVideo::create_objects");
387 add_subwindow(new PNGUseAlpha(this, x, y));
388 add_subwindow(new BC_OKButton(this));
393 int PNGConfigVideo::close_event()
400 PNGUseAlpha::PNGUseAlpha(PNGConfigVideo *gui, int x, int y)
401 : BC_CheckBox(x, y, gui->asset->png_use_alpha, _("Use alpha"))
406 int PNGUseAlpha::handle_event()
408 gui->asset->png_use_alpha = get_value();