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-rw-r--r--src/video_dec/yuv.c377
1 files changed, 377 insertions, 0 deletions
diff --git a/src/video_dec/yuv.c b/src/video_dec/yuv.c
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+++ b/src/video_dec/yuv.c
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+/*
+ * Copyright (C) 2000-2004 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
+ *
+ * YUV "Decoder" by Mike Melanson (melanson@pcisys.net)
+ * Actually, this decoder just reorganizes chunks of raw YUV data in such
+ * a way that xine can display them.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <xine/xine_internal.h>
+#include <xine/video_out.h>
+#include <xine/buffer.h>
+#include <xine/xineutils.h>
+#include "bswap.h"
+
+#define VIDEOBUFSIZE 128*1024
+
+typedef struct {
+ video_decoder_class_t decoder_class;
+} yuv_class_t;
+
+typedef struct yuv_decoder_s {
+ video_decoder_t video_decoder; /* parent video decoder structure */
+
+ yuv_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 progressive;
+ int top_field_first;
+
+} yuv_decoder_t;
+
+/**************************************************************************
+ * xine video plugin functions
+ *************************************************************************/
+
+/*
+ * This function receives a buffer of data from the demuxer layer and
+ * figures out how to handle it based on its header flags.
+ */
+static void yuv_decode_data (video_decoder_t *this_gen,
+ buf_element_t *buf) {
+
+ yuv_decoder_t *this = (yuv_decoder_t *) this_gen;
+ xine_bmiheader *bih;
+
+ 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_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 (buf->decoder_flags & BUF_FLAG_ASPECT)
+ this->ratio = (double)buf->decoder_info[1] / (double)buf->decoder_info[2];
+ else
+ this->ratio = (double)this->width / (double)this->height;
+
+ this->progressive = buf->decoder_info[3];
+ this->top_field_first = buf->decoder_info[4];
+
+ free (this->buf);
+ this->buf = NULL;
+
+ this->bufsize = VIDEOBUFSIZE;
+ this->buf = malloc(this->bufsize);
+ this->size = 0;
+
+ this->decoder_ok = 1;
+
+ /* load the stream/meta info */
+ switch (buf->type) {
+
+ case BUF_VIDEO_YUY2:
+ _x_meta_info_set_utf8(this->stream, XINE_META_INFO_VIDEOCODEC, "Raw YUY2");
+ break;
+
+ case BUF_VIDEO_YV12:
+ _x_meta_info_set_utf8(this->stream, XINE_META_INFO_VIDEOCODEC, "Raw YV12");
+ break;
+
+ case BUF_VIDEO_YVU9:
+ _x_meta_info_set_utf8(this->stream, XINE_META_INFO_VIDEOCODEC, "Raw YVU9");
+ break;
+
+ case BUF_VIDEO_GREY:
+ _x_meta_info_set_utf8(this->stream, XINE_META_INFO_VIDEOCODEC, "Greyscale YUV");
+ break;
+
+ case BUF_VIDEO_I420:
+ _x_meta_info_set_utf8(this->stream, XINE_META_INFO_VIDEOCODEC, "Raw I420");
+ break;
+
+ }
+
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_VIDEO_WIDTH, this->width);
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_VIDEO_HEIGHT, this->height);
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_VIDEO_RATIO, this->ratio*10000);
+
+ return;
+ } else if (this->decoder_ok && !(buf->decoder_flags & BUF_FLAG_SPECIAL)) {
+ uint8_t *src;
+
+ /* if buffer contains an entire frame then there's no need to copy it
+ * into our internal buffer */
+ if ((buf->decoder_flags & BUF_FLAG_FRAME_START) &&
+ (buf->decoder_flags & BUF_FLAG_FRAME_END))
+ src = buf->content;
+ else {
+ 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;
+
+ src = this->buf;
+ }
+
+ if (buf->decoder_flags & BUF_FLAG_FRAME_END) {
+
+ if (buf->type == BUF_VIDEO_YUY2) {
+
+ img = this->stream->video_out->get_frame (this->stream->video_out,
+ this->width, this->height,
+ this->ratio, XINE_IMGFMT_YUY2, VO_BOTH_FIELDS);
+
+ yuy2_to_yuy2(
+ /* src */
+ src, this->width*2,
+ /* dst */
+ img->base[0], img->pitches[0],
+ /* width x height */
+ this->width, this->height);
+
+ } else if (buf->type == BUF_VIDEO_YV12) {
+
+ img = this->stream->video_out->get_frame (this->stream->video_out,
+ this->width, this->height,
+ this->ratio, XINE_IMGFMT_YV12, VO_BOTH_FIELDS);
+
+ yv12_to_yv12(
+ /* Y */
+ src, this->width,
+ img->base[0], img->pitches[0],
+ /* U */
+ src + (this->width * this->height * 5/4), this->width/2,
+ img->base[1], img->pitches[1],
+ /* V */
+ src + (this->width * this->height), this->width/2,
+ img->base[2], img->pitches[2],
+ /* width x height */
+ this->width, this->height);
+
+ } else if (buf->type == BUF_VIDEO_I420) {
+
+ img = this->stream->video_out->get_frame (this->stream->video_out,
+ this->width, this->height,
+ this->ratio, XINE_IMGFMT_YV12, VO_BOTH_FIELDS);
+
+ yv12_to_yv12(
+ /* Y */
+ src, this->width,
+ img->base[0], img->pitches[0],
+ /* U */
+ src + (this->width * this->height), this->width/2,
+ img->base[1], img->pitches[1],
+ /* V */
+ src + (this->width * this->height * 5/4), this->width/2,
+ img->base[2], img->pitches[2],
+ /* width x height */
+ this->width, this->height);
+
+ } else if (buf->type == BUF_VIDEO_YVU9) {
+
+ img = this->stream->video_out->get_frame (this->stream->video_out,
+ this->width, this->height,
+ this->ratio, XINE_IMGFMT_YV12, VO_BOTH_FIELDS);
+
+
+ yuv9_to_yv12(
+ /* Y */
+ src,
+ this->width,
+ img->base[0],
+ img->pitches[0],
+ /* U */
+ src + (this->width * this->height),
+ this->width / 4,
+ img->base[1],
+ img->pitches[1],
+ /* V */
+ src + (this->width * this->height) +
+ (this->width * this->height / 16),
+ this->width / 4,
+ img->base[2],
+ img->pitches[2],
+ /* width x height */
+ this->width,
+ this->height);
+
+ } else if (buf->type == BUF_VIDEO_GREY) {
+
+ img = this->stream->video_out->get_frame (this->stream->video_out,
+ this->width, this->height,
+ this->ratio, XINE_IMGFMT_YV12, VO_BOTH_FIELDS);
+
+ xine_fast_memcpy(img->base[0], src, this->width * this->height);
+ memset( img->base[1], 0x80, this->width * this->height / 4 );
+ memset( img->base[2], 0x80, this->width * this->height / 4 );
+
+ } else {
+
+ /* just allocate something to avoid compiler warnings */
+ img = this->stream->video_out->get_frame (this->stream->video_out,
+ this->width, this->height,
+ this->ratio, XINE_IMGFMT_YV12, VO_BOTH_FIELDS);
+
+ }
+
+ img->duration = this->video_step;
+ img->pts = buf->pts;
+ img->bad_frame = 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 yuv_flush (video_decoder_t *this_gen) {
+}
+
+/*
+ * This function resets the video decoder.
+ */
+static void yuv_reset (video_decoder_t *this_gen) {
+ yuv_decoder_t *this = (yuv_decoder_t *) this_gen;
+
+ this->size = 0;
+}
+
+static void yuv_discontinuity (video_decoder_t *this_gen) {
+}
+
+/*
+ * This function frees the video decoder instance allocated to the decoder.
+ */
+static void yuv_dispose (video_decoder_t *this_gen) {
+ yuv_decoder_t *this = (yuv_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) {
+
+ yuv_decoder_t *this ;
+
+ this = (yuv_decoder_t *) calloc(1, sizeof(yuv_decoder_t));
+
+ this->video_decoder.decode_data = yuv_decode_data;
+ this->video_decoder.flush = yuv_flush;
+ this->video_decoder.reset = yuv_reset;
+ this->video_decoder.discontinuity = yuv_discontinuity;
+ this->video_decoder.dispose = yuv_dispose;
+ this->size = 0;
+
+ this->stream = stream;
+ this->class = (yuv_class_t *) class_gen;
+
+ this->decoder_ok = 0;
+ this->buf = NULL;
+
+ return &this->video_decoder;
+}
+
+static void *init_plugin (xine_t *xine, void *data) {
+
+ yuv_class_t *this;
+
+ this = (yuv_class_t *) calloc(1, sizeof(yuv_class_t));
+
+ this->decoder_class.open_plugin = open_plugin;
+ this->decoder_class.identifier = "YUV";
+ this->decoder_class.description = N_("Raw YUV 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_YUY2,
+ BUF_VIDEO_YV12,
+ BUF_VIDEO_YVU9,
+ BUF_VIDEO_GREY,
+ BUF_VIDEO_I420,
+ 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, "yuv", 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 14:08:25 +0000