Commit db93fd53 authored by Tim-Philipp Müller's avatar Tim-Philipp Müller

Fix rowstrides

Original commit message from CVS:
Fix rowstrides
parent ae541a6e
2005-02-18 Tim-Philipp Müller <tim at centricular dot net>
* ext/jpeg/gstjpegdec.c: (gst_jpegdec_chain):
* ext/jpeg/gstjpegenc.c: (gst_jpegenc_resync), (gst_jpegenc_chain):
Use same rowstrides for I420 as used everywhere else.
2005-02-17 Tim-Philipp Müller <tim at centricular dot net>
* gst/avi/gstavidemux.c: (gst_avi_demux_invert):
......
......@@ -37,18 +37,24 @@ GstElementDetails gst_jpegdec_details = {
GST_DEBUG_CATEGORY (jpegdec_debug);
#define GST_CAT_DEFAULT jpegdec_debug
/* JpegDec signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
/* FILL ME */
};
/* These macros are adapted from videotestsrc.c
* and/or gst-plugins/gst/games/gstvideoimage.c */
#define ROUND_UP_2(x) (((x)+1)&~1)
#define ROUND_UP_4(x) (((x)+3)&~3)
#define ROUND_UP_8(x) (((x)+7)&~7)
/* I420 */
#define I420_Y_ROWSTRIDE(width) (ROUND_UP_4(width))
#define I420_U_ROWSTRIDE(width) (ROUND_UP_8(width)/2)
#define I420_V_ROWSTRIDE(width) ((ROUND_UP_8(I420_Y_ROWSTRIDE(width)))/2)
#define I420_Y_OFFSET(w,h) (0)
#define I420_U_OFFSET(w,h) (I420_Y_OFFSET(w,h)+(I420_Y_ROWSTRIDE(w)*ROUND_UP_2(h)))
#define I420_V_OFFSET(w,h) (I420_U_OFFSET(w,h)+(I420_U_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
#define I420_SIZE(w,h) (I420_V_OFFSET(w,h)+(I420_V_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
static void gst_jpegdec_base_init (gpointer g_class);
static void gst_jpegdec_class_init (GstJpegDec * klass);
......@@ -375,7 +381,7 @@ gst_jpegdec_chain (GstPad * pad, GstData * _data)
GstBuffer *outbuf;
/*GstMeta *meta; */
gint width, height, width2;
gint width, height;
guchar *base[3];
gint i, j, k;
gint r_h, r_v;
......@@ -443,7 +449,7 @@ gst_jpegdec_chain (GstPad * pad, GstData * _data)
/* FIXME: someone needs to do the work to figure out how to correctly
* calculate an output size that takes into account everything libjpeg
* needs, like padding for DCT size and so on. */
outsize = width * height + width * height / 2;
outsize = I420_SIZE (width, height);
outbuf = gst_pad_alloc_buffer (jpegdec->srcpad, GST_BUFFER_OFFSET_NONE,
outsize);
outdata = GST_BUFFER_DATA (outbuf);
......@@ -453,28 +459,25 @@ gst_jpegdec_chain (GstPad * pad, GstData * _data)
height, outsize);
/* mind the swap, jpeglib outputs blue chroma first */
/* FIXME: this needs stride love */
base[0] = outdata;
base[1] = base[0] + width * height;
base[2] = base[1] + width * height / 4;
width2 = width >> 1;
base[0] = outdata + I420_Y_OFFSET (width, height);
base[1] = outdata + I420_U_OFFSET (width, height);
base[2] = outdata + I420_V_OFFSET (width, height);
GST_LOG_OBJECT (jpegdec, "decompressing %u",
jpegdec->cinfo.rec_outbuf_height);
for (i = 0; i < height; i += r_v * DCTSIZE) {
for (j = 0, k = 0; j < (r_v * DCTSIZE); j += r_v, k++) {
jpegdec->line[0][j] = base[0];
base[0] += width;
base[0] += I420_Y_ROWSTRIDE (width);
if (r_v == 2) {
jpegdec->line[0][j + 1] = base[0];
base[0] += width;
base[0] += I420_Y_ROWSTRIDE (width);
}
jpegdec->line[1][k] = base[1];
jpegdec->line[2][k] = base[2];
if (r_v == 2 || k & 1) {
base[1] += width2;
base[2] += width2;
base[1] += I420_U_ROWSTRIDE (width);
base[2] += I420_V_ROWSTRIDE (width);
}
}
/*g_print ("%d\n", jpegdec->cinfo.output_scanline); */
......
......@@ -39,6 +39,23 @@ GST_DEBUG_CATEGORY (jpegenc_debug);
#define JPEG_DEFAULT_QUALITY 85
/* These macros are adapted from videotestsrc.c
* and/or gst-plugins/gst/games/gstvideoimage.c */
#define ROUND_UP_2(x) (((x)+1)&~1)
#define ROUND_UP_4(x) (((x)+3)&~3)
#define ROUND_UP_8(x) (((x)+7)&~7)
/* I420 */
#define I420_Y_ROWSTRIDE(width) (ROUND_UP_4(width))
#define I420_U_ROWSTRIDE(width) (ROUND_UP_8(width)/2)
#define I420_V_ROWSTRIDE(width) ((ROUND_UP_8(I420_Y_ROWSTRIDE(width)))/2)
#define I420_Y_OFFSET(w,h) (0)
#define I420_U_OFFSET(w,h) (I420_Y_OFFSET(w,h)+(I420_Y_ROWSTRIDE(w)*ROUND_UP_2(h)))
#define I420_V_OFFSET(w,h) (I420_U_OFFSET(w,h)+(I420_U_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
#define I420_SIZE(w,h) (I420_V_OFFSET(w,h)+(I420_V_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
/* JpegEnc signals and args */
enum
{
......@@ -291,7 +308,6 @@ gst_jpegenc_link (GstPad * pad, const GstCaps * caps)
static void
gst_jpegenc_resync (GstJpegEnc * jpegenc)
{
guint size = 0;
gint width, height;
GST_DEBUG ("gst_jpegenc_resync: resync");
......@@ -311,14 +327,14 @@ gst_jpegenc_resync (GstJpegEnc * jpegenc)
#if 0
switch (jpegenc->format) {
case GST_COLORSPACE_RGB24:
size = 3;
jpegenc->bufsize = jpegenc->width * jpegenc->height * 3;
GST_DEBUG ("gst_jpegenc_resync: setting format to RGB24");
jpegenc->cinfo.in_color_space = JCS_RGB;
jpegenc->cinfo.raw_data_in = FALSE;
break;
case GST_COLORSPACE_YUV420P:
#endif
size = 2;
jpegenc->bufsize = I420_SIZE (jpegenc->width, jpegenc->height);
jpegenc->cinfo.raw_data_in = TRUE;
jpegenc->cinfo.in_color_space = JCS_YCbCr;
GST_DEBUG ("gst_jpegenc_resync: setting format to YUV420P");
......@@ -343,12 +359,11 @@ gst_jpegenc_resync (GstJpegEnc * jpegenc)
break;
default:
printf ("gst_jpegenc_resync: unsupported colorspace, using RGB\n");
size = 3;
jpegenc->bufsize = jpegenc->width * jpegenc->height * 3;
jpegenc->cinfo.in_color_space = JCS_RGB;
break;
}
#endif
jpegenc->bufsize = jpegenc->width * jpegenc->height * size;
jpeg_suppress_tables (&jpegenc->cinfo, TRUE);
//jpeg_suppress_tables(&jpegenc->cinfo, FALSE);
......@@ -367,7 +382,7 @@ gst_jpegenc_chain (GstPad * pad, GstData * _data)
GstBuffer *outbuf;
/* GstMeta *meta; */
guint height, width, width2;
guint height, width;
guchar *base[3];
gint i, j, k;
......@@ -394,9 +409,9 @@ gst_jpegenc_chain (GstPad * pad, GstData * _data)
width = jpegenc->width;
height = jpegenc->height;
base[0] = data;
base[1] = base[0] + width * height;
base[2] = base[1] + width * height / 4;
base[0] = data + I420_Y_OFFSET (width, height);
base[1] = data + I420_U_OFFSET (width, height);
base[2] = data + I420_V_OFFSET (width, height);
jpegenc->jdest.next_output_byte = outdata;
jpegenc->jdest.free_in_buffer = outsize;
......@@ -405,22 +420,23 @@ gst_jpegenc_chain (GstPad * pad, GstData * _data)
jpeg_set_quality (&jpegenc->cinfo, jpegenc->quality, TRUE);
jpeg_start_compress (&jpegenc->cinfo, TRUE);
width2 = width >> 1;
GST_DEBUG ("gst_jpegdec_chain: compressing");
for (i = 0; i < height; i += 2 * DCTSIZE) {
for (j = 0, k = 0; j < 2 * DCTSIZE; j += 2, k++) {
/*g_print ("next scanline: %d\n", jpegenc->cinfo.next_scanline); */
for (j = 0, k = 0; j < (2 * DCTSIZE); j += 2, k++) {
jpegenc->line[0][j] = base[0];
base[0] += width;
base[0] += I420_Y_ROWSTRIDE (width);
jpegenc->line[0][j + 1] = base[0];
base[0] += width;
base[0] += I420_Y_ROWSTRIDE (width);
jpegenc->line[1][k] = base[1];
base[1] += width2;
base[1] += I420_U_ROWSTRIDE (width);
jpegenc->line[2][k] = base[2];
base[2] += width2;
base[2] += I420_V_ROWSTRIDE (width);
}
jpeg_write_raw_data (&jpegenc->cinfo, jpegenc->line, 2 * DCTSIZE);
}
jpeg_finish_compress (&jpegenc->cinfo);
GST_DEBUG ("gst_jpegdec_chain: compressing done");
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment