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-rw-r--r--src/video_dec/rgb.c451
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diff --git a/src/video_dec/rgb.c b/src/video_dec/rgb.c
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+++ b/src/video_dec/rgb.c
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+/*
+ * Copyright (C) 2000-2003 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 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.
+ *
+ * This decoder deals with raw RGB data from Microsoft and Quicktime files.
+ * Data from a MS file can be 32-, 24-, 16-, or 8-bit. The latter can also
+ * be grayscale, depending on whether a palette is present. Data from a QT
+ * file can be 32-, 24-, 16-, 8-, 4-, 2-, or 1-bit. Any resolutions <= 8
+ * can also be greyscale depending on what the QT file specifies.
+ *
+ * One more catch: Raw RGB from a Microsoft file is upside down. This is
+ * indicated by a negative height parameter.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define LOG_MODULE "rgb"
+#define LOG_VERBOSE
+/*
+#define LOG
+*/
+#include <xine/xine_internal.h>
+#include <xine/video_out.h>
+#include <xine/buffer.h>
+#include <xine/xineutils.h>
+#include "bswap.h"
+
+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;
+ int bit_depth;
+ int upside_down;
+
+ 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;
+ int pixels_left;
+ unsigned char pixel_byte = 0;
+
+ 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_FRAMERATE) {
+ this->video_step = buf->decoder_info[0];
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_FRAME_DURATION, this->video_step);
+ }
+
+ if (buf->decoder_flags & BUF_FLAG_STDHEADER) { /* need to initialize */
+ (this->stream->video_out->open) (this->stream->video_out, this->stream);
+
+ bih = (xine_bmiheader *) buf->content;
+ this->width = (bih->biWidth + 3) & ~0x03;
+ this->height = (bih->biHeight + 3) & ~0x03;
+ if (this->height < 0) {
+ this->upside_down = 1;
+ this->height = -this->height;
+ } else {
+ this->upside_down = 0;
+ }
+ this->ratio = (double)this->width/(double)this->height;
+
+ this->bit_depth = bih->biBitCount;
+ if (this->bit_depth > 32)
+ this->bit_depth &= 0x1F;
+ /* round this number up in case of 15 */
+ lprintf("width = %d, height = %d, bit_depth = %d\n", this->width, this->height, this->bit_depth);
+
+ this->bytes_per_pixel = (this->bit_depth + 1) / 8;
+
+ free (this->buf);
+
+ /* minimal buffer size */
+ this->bufsize = this->width * this->height * this->bytes_per_pixel;
+ this->buf = calloc(1, 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 */
+ _x_meta_info_set_utf8(this->stream, XINE_META_INFO_VIDEOCODEC, "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_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;
+
+ if (this->upside_down) {
+ for (row_ptr = this->yuv_planes.row_width * (this->yuv_planes.row_count - 1);
+ row_ptr >= 0; 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) {
+
+ /* ABGR1555 format, little-endian order */
+ packed_pixel = _X_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 {
+
+ /* BGR24 or BGRA32 */
+ b = this->buf[buf_ptr++];
+ g = this->buf[buf_ptr++];
+ r = this->buf[buf_ptr++];
+
+ /* the next line takes care of 'A' in the 32-bit case */
+ 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);
+
+ }
+ }
+ }
+ } else {
+
+ for (row_ptr = 0; row_ptr < this->yuv_planes.row_width * this->yuv_planes.row_count; row_ptr += this->yuv_planes.row_width) {
+ pixels_left = 0;
+ for (pixel_ptr = 0; pixel_ptr < this->width; pixel_ptr++) {
+
+ if (this->bit_depth == 1) {
+
+ if (pixels_left == 0) {
+ pixels_left = 8;
+ pixel_byte = *this->buf++;
+ }
+
+ if (pixel_byte & 0x80) {
+ this->yuv_planes.y[row_ptr + pixel_ptr] =
+ this->yuv_palette[1 * 4 + 0];
+ this->yuv_planes.u[row_ptr + pixel_ptr] =
+ this->yuv_palette[1 * 4 + 1];
+ this->yuv_planes.v[row_ptr + pixel_ptr] =
+ this->yuv_palette[1 * 4 + 2];
+ } else {
+ this->yuv_planes.y[row_ptr + pixel_ptr] =
+ this->yuv_palette[0 * 4 + 0];
+ this->yuv_planes.u[row_ptr + pixel_ptr] =
+ this->yuv_palette[0 * 4 + 1];
+ this->yuv_planes.v[row_ptr + pixel_ptr] =
+ this->yuv_palette[0 * 4 + 2];
+ }
+ pixels_left--;
+ pixel_byte <<= 1;
+
+ } else if (this->bit_depth == 2) {
+
+ if (pixels_left == 0) {
+ pixels_left = 4;
+ pixel_byte = *this->buf++;
+ }
+
+ palette_index = (pixel_byte & 0xC0) >> 6;
+ 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];
+
+ pixels_left--;
+ pixel_byte <<= 2;
+
+ } else if (this->bit_depth == 4) {
+
+ if (pixels_left == 0) {
+ pixels_left = 2;
+ pixel_byte = *this->buf++;
+ }
+
+ palette_index = (pixel_byte & 0xF0) >> 4;
+ 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];
+
+ pixels_left--;
+ pixel_byte <<= 4;
+
+ } else 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) {
+
+ /* ARGB1555 format, big-endian order */
+ packed_pixel = _X_BE_16(&this->buf[buf_ptr]);
+ buf_ptr += 2;
+ UNPACK_RGB15(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 {
+
+ /* RGB24 or ARGB32; the next line takes care of 'A' in the
+ * 32-bit case */
+ buf_ptr += this->bytes_per_pixel - 3;
+
+ r = this->buf[buf_ptr++];
+ g = this->buf[buf_ptr++];
+ b = 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);
+
+ }
+ }
+ }
+ }
+
+ 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;
+
+ free (this->buf);
+
+ 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 *) calloc(1, 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 void *init_plugin (xine_t *xine, void *data) {
+
+ rgb_class_t *this;
+
+ this = (rgb_class_t *) calloc(1, sizeof(rgb_class_t));
+
+ this->decoder_class.open_plugin = open_plugin;
+ this->decoder_class.identifier = "RGB";
+ this->decoder_class.description = N_("Raw RGB video decoder plugin");
+ this->decoder_class.dispose = default_video_decoder_class_dispose;
+
+ return this;
+}
+
+/*
+ * exported plugin catalog entry
+ */
+
+static const uint32_t video_types[] = {
+ BUF_VIDEO_RGB,
+ 0
+ };
+
+static const decoder_info_t dec_info_video = {
+ video_types, /* supported types */
+ 1 /* priority */
+};
+
+const plugin_info_t xine_plugin_info[] EXPORTED = {
+ /* type, API, "name", version, special_info, init_function */
+ { PLUGIN_VIDEO_DECODER, 19, "rgb", XINE_VERSION_CODE, &dec_info_video, init_plugin },
+ { PLUGIN_NONE, 0, "", 0, NULL, NULL }
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 14:11:43 +0000