/* 2004.02.01 first released source code for IOMP */ /* * Copyright (C) 2000-2002 the xine project * * This file is part of xine, a free video player. * * xine 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. * * xine 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 program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * * Raw RGB "Decoder" by Mike Melanson (melanson@pcisys.net) * Actually, this decoder just converts a raw RGB image to a YUY2 map * suitable for display under xine. * * $Id: rgb.c,v 1.2 2003/11/25 04:26:07 georgedon Exp $ */ #include #include #include #include #include #include "xine_internal.h" #include "video_out.h" #include "buffer.h" #include "xineutils.h" #include "bswap.h" #define VIDEOBUFSIZE 128*1024 typedef struct { video_decoder_class_t decoder_class; } rgb_class_t; typedef struct rgb_decoder_s { video_decoder_t video_decoder; /* parent video decoder structure */ rgb_class_t *class; xine_stream_t *stream; /* these are traditional variables in a video decoder object */ uint64_t video_step; /* frame duration in pts units */ int decoder_ok; /* current decoder status */ int skipframes; unsigned char *buf; /* the accumulated buffer data */ int bufsize; /* the maximum size of buf */ int size; /* the current size of buf */ int width; /* the width of a video frame */ int height; /* the height of a video frame */ double ratio; /* the width to height ratio */ int bytes_per_pixel; unsigned char yuv_palette[256 * 4]; yuv_planes_t yuv_planes; } rgb_decoder_t; static void rgb_decode_data (video_decoder_t *this_gen, buf_element_t *buf) { rgb_decoder_t *this = (rgb_decoder_t *) this_gen; xine_bmiheader *bih; palette_entry_t *palette; int i; int pixel_ptr, row_ptr; int palette_index; int buf_ptr; unsigned int packed_pixel; unsigned char r, g, b; vo_frame_t *img; /* video out frame */ /* a video decoder does not care about this flag (?) */ if (buf->decoder_flags & BUF_FLAG_PREVIEW) return; if ((buf->decoder_flags & BUF_FLAG_SPECIAL) && (buf->decoder_info[1] == BUF_SPECIAL_PALETTE)) { palette = (palette_entry_t *)buf->decoder_info_ptr[2]; for (i = 0; i < buf->decoder_info[2]; i++) { this->yuv_palette[i * 4 + 0] = COMPUTE_Y(palette[i].r, palette[i].g, palette[i].b); this->yuv_palette[i * 4 + 1] = COMPUTE_U(palette[i].r, palette[i].g, palette[i].b); this->yuv_palette[i * 4 + 2] = COMPUTE_V(palette[i].r, palette[i].g, palette[i].b); } } if (buf->decoder_flags & BUF_FLAG_HEADER) { /* need to initialize */ this->stream->video_out->open (this->stream->video_out, this->stream); if(this->buf) free(this->buf); bih = (xine_bmiheader *) buf->content; this->width = (bih->biWidth + 3) & ~0x03; this->height = (bih->biHeight + 3) & ~0x03; this->ratio = (double)this->width/(double)this->height; this->video_step = buf->decoder_info[1]; /* round this number up in case of 15 */ this->bytes_per_pixel = (bih->biBitCount + 1) / 8; if (this->buf) free (this->buf); this->bufsize = VIDEOBUFSIZE; this->buf = xine_xmalloc(this->bufsize); this->size = 0; init_yuv_planes(&this->yuv_planes, this->width, this->height); this->stream->video_out->open (this->stream->video_out, this->stream); this->decoder_ok = 1; /* load the stream/meta info */ this->stream->meta_info[XINE_META_INFO_VIDEOCODEC] = strdup("Raw RGB"); return; } else if (this->decoder_ok) { if (this->size + buf->size > this->bufsize) { this->bufsize = this->size + 2 * buf->size; this->buf = realloc (this->buf, this->bufsize); } xine_fast_memcpy (&this->buf[this->size], buf->content, buf->size); this->size += buf->size; if (buf->decoder_flags & BUF_FLAG_FRAMERATE) this->video_step = buf->decoder_info[0]; if (buf->decoder_flags & BUF_FLAG_FRAME_END) { img = this->stream->video_out->get_frame (this->stream->video_out, this->width, this->height, this->ratio, XINE_IMGFMT_YUY2, VO_BOTH_FIELDS); img->duration = this->video_step; img->pts = buf->pts; img->bad_frame = 0; /* iterate through each row */ buf_ptr = 0; for (row_ptr = 0; row_ptr < this->yuv_planes.row_width * this->yuv_planes.row_count; row_ptr += this->yuv_planes.row_width) { for (pixel_ptr = 0; pixel_ptr < this->width; pixel_ptr++) { if (this->bytes_per_pixel == 1) { palette_index = this->buf[buf_ptr++]; this->yuv_planes.y[row_ptr + pixel_ptr] = this->yuv_palette[palette_index * 4 + 0]; this->yuv_planes.u[row_ptr + pixel_ptr] = this->yuv_palette[palette_index * 4 + 1]; this->yuv_planes.v[row_ptr + pixel_ptr] = this->yuv_palette[palette_index * 4 + 2]; } else if (this->bytes_per_pixel == 2) { packed_pixel = LE_16(&this->buf[buf_ptr]); buf_ptr += 2; UNPACK_BGR15(packed_pixel, r, g, b); this->yuv_planes.y[row_ptr + pixel_ptr] = COMPUTE_Y(r, g, b); this->yuv_planes.u[row_ptr + pixel_ptr] = COMPUTE_U(r, g, b); this->yuv_planes.v[row_ptr + pixel_ptr] = COMPUTE_V(r, g, b); } else { b = this->buf[buf_ptr++]; g = this->buf[buf_ptr++]; r = this->buf[buf_ptr++]; buf_ptr += this->bytes_per_pixel - 3; this->yuv_planes.y[row_ptr + pixel_ptr] = COMPUTE_Y(r, g, b); this->yuv_planes.u[row_ptr + pixel_ptr] = COMPUTE_U(r, g, b); this->yuv_planes.v[row_ptr + pixel_ptr] = COMPUTE_V(r, g, b); } } } yuv444_to_yuy2(&this->yuv_planes, img->base[0], img->pitches[0]); img->draw(img, this->stream); img->free(img); this->size = 0; } } } /* * This function is called when xine needs to flush the system. Not * sure when or if this is used or even if it needs to do anything. */ static void rgb_flush (video_decoder_t *this_gen) { } /* * This function resets the video decoder. */ static void rgb_reset (video_decoder_t *this_gen) { rgb_decoder_t *this = (rgb_decoder_t *) this_gen; this->size = 0; } static void rgb_discontinuity (video_decoder_t *this_gen) { } /* * This function frees the video decoder instance allocated to the decoder. */ static void rgb_dispose (video_decoder_t *this_gen) { rgb_decoder_t *this = (rgb_decoder_t *) this_gen; if (this->buf) { free (this->buf); this->buf = NULL; } if (this->decoder_ok) { this->decoder_ok = 0; this->stream->video_out->close(this->stream->video_out, this->stream); } free (this_gen); } static video_decoder_t *open_plugin (video_decoder_class_t *class_gen, xine_stream_t *stream) { rgb_decoder_t *this ; this = (rgb_decoder_t *) xine_xmalloc (sizeof (rgb_decoder_t)); this->video_decoder.decode_data = rgb_decode_data; this->video_decoder.flush = rgb_flush; this->video_decoder.reset = rgb_reset; this->video_decoder.discontinuity = rgb_discontinuity; this->video_decoder.dispose = rgb_dispose; this->size = 0; this->stream = stream; this->class = (rgb_class_t *) class_gen; this->decoder_ok = 0; this->buf = NULL; return &this->video_decoder; } static char *get_identifier (video_decoder_class_t *this) { return "RGB"; } static char *get_description (video_decoder_class_t *this) { return "Raw RGB video decoder plugin"; } static void dispose_class (video_decoder_class_t *this) { free (this); } static void *init_plugin (xine_t *xine, void *data) { rgb_class_t *this; this = (rgb_class_t *) xine_xmalloc (sizeof (rgb_class_t)); this->decoder_class.open_plugin = open_plugin; this->decoder_class.get_identifier = get_identifier; this->decoder_class.get_description = get_description; this->decoder_class.dispose = dispose_class; return this; } /* * exported plugin catalog entry */ static uint32_t video_types[] = { BUF_VIDEO_RGB, 0 }; static decoder_info_t dec_info_video = { video_types, /* supported types */ 1 /* priority */ }; plugin_info_t xine_plugin_info[] = { /* type, API, "name", version, special_info, init_function */ { PLUGIN_VIDEO_DECODER, 15, "rgb", XINE_VERSION_CODE, &dec_info_video, init_plugin }, { PLUGIN_NONE, 0, "", 0, NULL, NULL } };