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-rw-r--r--src/libxinevdec/rgb.c329
1 files changed, 329 insertions, 0 deletions
diff --git a/src/libxinevdec/rgb.c b/src/libxinevdec/rgb.c
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+++ b/src/libxinevdec/rgb.c
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+/*
+ * 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 1.1 2002/07/15 00:56:12 tmmm Exp $
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "video_out.h"
+#include "buffer.h"
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "bswap.h"
+
+#define VIDEOBUFSIZE 128*1024
+
+#define LE_16(x) (le2me_16(*(uint16_t *)(x)))
+#define LE_32(x) (le2me_32(*(uint32_t *)(x)))
+
+typedef struct rgb_decoder_s {
+ video_decoder_t video_decoder; /* parent video decoder structure */
+
+ /* these are traditional variables in a video decoder object */
+ vo_instance_t *video_out; /* object that will receive frames */
+ 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 */
+ int bytes_per_pixel;
+
+ unsigned char yuv_palette[256 * 4];
+ yuv_planes_t yuv_planes;
+
+} rgb_decoder_t;
+
+static int rgb_can_handle (video_decoder_t *this_gen, int buf_type) {
+
+ return (buf_type == BUF_VIDEO_RGB);
+}
+
+static void rgb_init (video_decoder_t *this_gen,
+ vo_instance_t *video_out) {
+ rgb_decoder_t *this = (rgb_decoder_t *) this_gen;
+
+ /* set our own video_out object to the one that xine gives us */
+ this->video_out = video_out;
+
+ /* indicate that the decoder is not quite ready yet */
+ this->decoder_ok = 0;
+}
+
+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[3];
+ 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->video_out->open (this->video_out);
+
+ if(this->buf)
+ free(this->buf);
+
+ bih = (xine_bmiheader *) buf->content;
+ this->width = (bih->biWidth + 3) & ~0x03;
+ this->height = (bih->biHeight + 3) & ~0x03;
+ 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 = malloc(this->bufsize);
+ this->size = 0;
+
+ this->video_out->open (this->video_out);
+ this->decoder_ok = 1;
+
+ init_yuv_planes(&this->yuv_planes, this->width, this->height);
+
+ 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->video_out->get_frame (this->video_out,
+ this->width, this->height,
+ 42, 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;
+ row_ptr = this->yuv_planes.row_stride *
+ (this->yuv_planes.row_count - 1);
+ for (; row_ptr >= 0; row_ptr -= this->yuv_planes.row_stride) {
+ 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++];
+
+ 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);
+
+ }
+ }
+
+ // take care of the extra 2 pixels on the C lines
+ this->yuv_planes.u[row_ptr + pixel_ptr] =
+ this->yuv_planes.u[row_ptr + pixel_ptr - 1];
+ this->yuv_planes.u[row_ptr + pixel_ptr + 1] =
+ this->yuv_planes.u[row_ptr + pixel_ptr - 2];
+
+ this->yuv_planes.v[row_ptr + pixel_ptr] =
+ this->yuv_planes.v[row_ptr + pixel_ptr - 1];
+ this->yuv_planes.v[row_ptr + pixel_ptr + 1] =
+ this->yuv_planes.v[row_ptr + pixel_ptr - 2];
+ }
+
+ yuv444_to_yuy2(&this->yuv_planes, img->base[0]);
+
+/*
+ if (img->copy) {
+
+ int height = abs(this->biHeight);
+ int stride = this->biWidth;
+ uint8_t* src[3];
+
+ src[0] = img->base[0];
+ src[1] = img->base[1];
+ src[2] = img->base[2];
+ while ((height -= 16) >= 0) {
+ img->copy(img, src);
+ src[0] += 16 * stride;
+ src[1] += 4 * stride;
+ src[2] += 4 * stride;
+ }
+ }
+*/
+
+ img->draw(img);
+ 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;
+}
+
+/*
+ * This function is called when xine shuts down the decoder. It should
+ * free any memory and release any other resources allocated during the
+ * execution of the decoder.
+ */
+static void rgb_close (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->video_out->close(this->video_out);
+ }
+}
+
+/*
+ * This function returns the human-readable ID string to identify
+ * this decoder.
+ */
+static char *rgb_get_id(void) {
+ return "Raw RGB";
+}
+
+/*
+ * This function frees the video decoder instance allocated to the decoder.
+ */
+static void rgb_dispose (video_decoder_t *this_gen) {
+ free (this_gen);
+}
+
+video_decoder_t *init_video_decoder_plugin (int iface_version, xine_t *xine) {
+
+ rgb_decoder_t *this ;
+
+ if (iface_version != 10) {
+ printf( "rgb: plugin doesn't support plugin API version %d.\n"
+ "rgb: this means there's a version mismatch between xine and this "
+ "rgb: decoder plugin.\nInstalling current plugins should help.\n",
+ iface_version);
+ return NULL;
+ }
+
+ this = (rgb_decoder_t *) malloc (sizeof (rgb_decoder_t));
+ memset(this, 0, sizeof (rgb_decoder_t));
+
+ this->video_decoder.interface_version = iface_version;
+ this->video_decoder.can_handle = rgb_can_handle;
+ this->video_decoder.init = rgb_init;
+ this->video_decoder.decode_data = rgb_decode_data;
+ this->video_decoder.flush = rgb_flush;
+ this->video_decoder.reset = rgb_reset;
+ this->video_decoder.close = rgb_close;
+ this->video_decoder.get_identifier = rgb_get_id;
+ this->video_decoder.dispose = rgb_dispose;
+ this->video_decoder.priority = 1;
+
+ return (video_decoder_t *) this;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-07 01:51:50 +0000