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ext/mpeg2dec/gstmpeg2dec.c: Handle Y42B-format MPEG video, patch from Matthew.Spencer@eu.sony.com (Matthew Spencer) (...

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Original commit message from CVS:
* ext/mpeg2dec/gstmpeg2dec.c: (gst_mpeg2dec_alloc_buffer),
(gst_mpeg2dec_negotiate_format):  Handle Y42B-format MPEG
video, patch from Matthew.Spencer@eu.sony.com (Matthew Spencer)
(bug #137504)
* ext/mpeg2dec/gstmpeg2dec.h:
This commit is contained in:
Matthew.Spencer@eu.sony.com 2004-03-31 06:31:47 +00:00 committed by David Schleef
parent 48bc7dcb6d
commit bcb74c4d07
3 changed files with 53 additions and 13 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2004-03-30 David Schleef <ds@schleef.org>
* ext/mpeg2dec/gstmpeg2dec.c: (gst_mpeg2dec_alloc_buffer),
(gst_mpeg2dec_negotiate_format): Handle Y42B-format MPEG
video, patch from Matthew.Spencer@eu.sony.com (Matthew Spencer)
(bug #137504)
* ext/mpeg2dec/gstmpeg2dec.h:
2004-03-30 David Schleef <ds@schleef.org>
* ext/gdk_pixbuf/Makefile.am: Remove spurious rules. (bug #136527)

53
ext/mpeg2dec/gstmpeg2dec.c
View file

@ -67,7 +67,7 @@ GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-yuv, "
"format = (fourcc) { YV12, I420 }, "
"format = (fourcc) { YV12, I420, Y42B }, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"pixel_width = (int) [ 1, 255 ], "
@ -291,17 +291,30 @@ gst_mpeg2dec_alloc_buffer (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info,
guint8 *buf[3], *out;
const mpeg2_picture_t *picture;
outbuf = gst_buffer_new_and_alloc ((size * 3) / 2);
if (mpeg2dec->format == MPEG2DEC_FORMAT_I422) {
outbuf = gst_buffer_new_and_alloc (size * 2);
out = GST_BUFFER_DATA (outbuf);
out = GST_BUFFER_DATA (outbuf);
buf[0] = out;
if (mpeg2dec->format == MPEG2DEC_FORMAT_I420) {
buf[0] = out;
buf[1] = buf[0] + size;
buf[2] = buf[1] + size / 4;
buf[2] = buf[1] + size / 2;
} else {
buf[2] = buf[0] + size;
buf[1] = buf[2] + size / 4;
outbuf = gst_buffer_new_and_alloc ((size * 3) / 2);
out = GST_BUFFER_DATA (outbuf);
buf[0] = out;
if (mpeg2dec->format == MPEG2DEC_FORMAT_I420) {
buf[0] = out;
buf[1] = buf[0] + size;
buf[2] = buf[1] + size / 4;
} else {
buf[0] = out;
buf[2] = buf[0] + size;
buf[1] = buf[2] + size / 4;
}
}
gst_buffer_ref (outbuf);
@ -326,16 +339,32 @@ static gboolean
gst_mpeg2dec_negotiate_format (GstMpeg2dec * mpeg2dec)
{
GstCaps *caps;
guint32 fourcc;
guint32 fourcc, myFourcc;
gboolean ret;
const mpeg2_info_t *info;
const mpeg2_sequence_t *sequence;
if (!GST_PAD_IS_LINKED (mpeg2dec->srcpad)) {
mpeg2dec->format = MPEG2DEC_FORMAT_I420;
return TRUE;
}
info = mpeg2_info (mpeg2dec->decoder);
sequence = info->sequence;
if (sequence->width != sequence->chroma_width &&
sequence->height != sequence->chroma_height)
myFourcc = GST_STR_FOURCC ("I420");
else if (sequence->width == sequence->chroma_width ||
sequence->height == sequence->chroma_height)
myFourcc = GST_STR_FOURCC ("Y42B");
else {
g_warning ("mpeg2dec: 4:4:4 format not yet supported");
return (FALSE);
}
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, GST_STR_FOURCC ("I420"),
"format", GST_TYPE_FOURCC, myFourcc,
"width", G_TYPE_INT, mpeg2dec->width,
"height", G_TYPE_INT, mpeg2dec->height,
"pixel_width", G_TYPE_INT, mpeg2dec->pixel_width,
@ -351,7 +380,9 @@ gst_mpeg2dec_negotiate_format (GstMpeg2dec * mpeg2dec)
gst_structure_get_fourcc (gst_caps_get_structure (caps, 0),
"format", &fourcc);
if (fourcc == GST_STR_FOURCC ("I420")) {
if (fourcc == GST_STR_FOURCC ("Y42B")) {
mpeg2dec->format = MPEG2DEC_FORMAT_I422;
} else if (fourcc == GST_STR_FOURCC ("I420")) {
mpeg2dec->format = MPEG2DEC_FORMAT_I420;
} else {
mpeg2dec->format = MPEG2DEC_FORMAT_YV12;

5
ext/mpeg2dec/gstmpeg2dec.h
View file

@ -47,15 +47,16 @@ typedef struct _GstMpeg2decClass GstMpeg2decClass;
typedef enum
{
MPEG2DEC_FORMAT_NONE,
MPEG2DEC_FORMAT_I422,
MPEG2DEC_FORMAT_I420,
MPEG2DEC_FORMAT_YV12,
MPEG2DEC_FORMAT_YV12
} Mpeg2decFormat;
typedef enum
{
MPEG2DEC_DISC_NONE = 0,
MPEG2DEC_DISC_NEW_PICTURE,
MPEG2DEC_DISC_NEW_KEYFRAME,
MPEG2DEC_DISC_NEW_KEYFRAME
} DiscontState;
struct _GstMpeg2dec {