The patch number 8197 was added via Jean-Francois Moine <[EMAIL PROTECTED]>
to http://linuxtv.org/hg/v4l-dvb master development tree.
Kernel patches in this development tree may be modified to be backward
compatible with older kernels. Compatibility modifications will be
removed before inclusion into the mainstream Kernel
If anyone has any objections, please let us know by sending a message to:
[EMAIL PROTECTED]
------
From: Hans de Goede <[EMAIL PROTECTED]>
gspca: pac207 frames no more decoded in the subdriver.
videodev2: New pixfmt
pac207: Remove the specific decoding.
main: get_buff_size operation added for the subdriver.
Signed-off-by: Hans de Goede <[EMAIL PROTECTED]>
Signed-off-by: Jean-Francois Moine <[EMAIL PROTECTED]>
---
linux/drivers/media/video/gspca/gspca.c | 7
linux/drivers/media/video/gspca/gspca.h | 2
linux/drivers/media/video/gspca/pac207.c | 361 ++---------------------
linux/include/linux/videodev2.h | 3
4 files changed, 57 insertions(+), 316 deletions(-)
diff -r facbd35d017f -r 8745ad321988 linux/drivers/media/video/gspca/gspca.c
--- a/linux/drivers/media/video/gspca/gspca.c Fri Jul 04 19:55:18 2008 +0200
+++ b/linux/drivers/media/video/gspca/gspca.c Fri Jul 04 20:29:32 2008 +0200
@@ -327,6 +327,7 @@ static int gspca_is_compressed(__u32 for
case V4L2_PIX_FMT_MJPEG:
case V4L2_PIX_FMT_JPEG:
case V4L2_PIX_FMT_SPCA561:
+ case V4L2_PIX_FMT_PAC207:
return 1;
}
return 0;
@@ -386,7 +387,8 @@ static __u32 get_v4l2_depth(__u32 pixfmt
case V4L2_PIX_FMT_JPEG:
case V4L2_PIX_FMT_SBGGR8: /* 'BA81' Bayer */
case V4L2_PIX_FMT_SN9C10X: /* 'S910' SN9C10x compression */
- case V4L2_PIX_FMT_SPCA561: /* 'S561' compressed BGGR bayer */
+ case V4L2_PIX_FMT_SPCA561: /* 'S561' compressed GBRG bayer */
+ case V4L2_PIX_FMT_PAC207: /* 'P207' compressed BGGR bayer */
return 8;
}
PDEBUG(D_ERR|D_CONF, "Unknown pixel format %c%c%c%c",
@@ -400,6 +402,9 @@ static int gspca_get_buff_size(struct gs
static int gspca_get_buff_size(struct gspca_dev *gspca_dev, int mode)
{
unsigned int size;
+
+ if (gspca_dev->sd_desc->get_buff_size)
+ return gspca_dev->sd_desc->get_buff_size(gspca_dev, mode);
size = gspca_dev->cam.cam_mode[mode].width *
gspca_dev->cam.cam_mode[mode].height *
diff -r facbd35d017f -r 8745ad321988 linux/drivers/media/video/gspca/gspca.h
--- a/linux/drivers/media/video/gspca/gspca.h Fri Jul 04 19:55:18 2008 +0200
+++ b/linux/drivers/media/video/gspca/gspca.h Fri Jul 04 20:29:32 2008 +0200
@@ -80,6 +80,7 @@ typedef void (*cam_pkt_op) (struct gspca
struct gspca_frame *frame,
__u8 *data,
int len);
+typedef int (*cam_get_buff_size_op) (struct gspca_dev *gspca_dev, int mode);
struct ctrl {
struct v4l2_queryctrl qctrl;
@@ -106,6 +107,7 @@ struct sd_desc {
cam_jpg_op get_jcomp;
cam_jpg_op set_jcomp;
cam_qmnu_op querymenu;
+ cam_get_buff_size_op get_buff_size; /* optional */
};
/* packet types when moving from iso buf to frame buf */
diff -r facbd35d017f -r 8745ad321988 linux/drivers/media/video/gspca/pac207.c
--- a/linux/drivers/media/video/gspca/pac207.c Fri Jul 04 19:55:18 2008 +0200
+++ b/linux/drivers/media/video/gspca/pac207.c Fri Jul 04 20:29:32 2008 +0200
@@ -58,33 +58,9 @@ MODULE_LICENSE("GPL");
before doing any other adjustments */
#define PAC207_AUTOGAIN_IGNORE_FRAMES 3
-enum pac207_line_state {
- LINE_HEADER1,
- LINE_HEADER2,
- LINE_UNCOMPRESSED,
- LINE_COMPRESSED,
-};
-
-struct pac207_decoder_state {
- /* generic state */
- u16 line_read;
- u16 line_marker;
- u8 line_state;
- u8 header_read;
- /* compression state */
- u16 processed_bytes;
- u8 remaining_bits;
- s8 no_remaining_bits;
- u8 get_abs;
- u8 discard_byte;
- u8 line_decode_buf[352];
-};
-
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
-
- struct pac207_decoder_state decoder_state;
u8 mode;
@@ -94,6 +70,7 @@ struct sd {
u8 gain;
u8 sof_read;
+ u8 header_read;
u8 autogain_ignore_frames;
atomic_t avg_lum;
@@ -173,8 +150,8 @@ static struct ctrl sd_ctrls[] = {
};
static struct cam_mode sif_mode[] = {
- {V4L2_PIX_FMT_SBGGR8, 176, 144, 1},
- {V4L2_PIX_FMT_SBGGR8, 352, 288, 0},
+ {V4L2_PIX_FMT_PAC207, 176, 144, 1},
+ {V4L2_PIX_FMT_PAC207, 352, 288, 0},
};
static const __u8 pac207_sensor_init[][8] = {
@@ -361,68 +338,17 @@ static void sd_close(struct gspca_dev *g
{
}
-/* -- convert pixart frames to Bayer -- */
-/* Sonix decompressor struct B.S.(2004) */
-static struct {
- u8 is_abs;
- u8 len;
- s8 val;
-} table[256];
-
-void init_pixart_decoder(void)
-{
- int i, is_abs, val, len;
-
- for (i = 0; i < 256; i++) {
- is_abs = 0;
- val = 0;
- len = 0;
- if ((i & 0xC0) == 0) {
- /* code 00 */
- val = 0;
- len = 2;
- } else if ((i & 0xC0) == 0x40) {
- /* code 01 */
- val = -5;
- len = 2;
- } else if ((i & 0xC0) == 0x80) {
- /* code 10 */
- val = 5;
- len = 2;
- } else if ((i & 0xF0) == 0xC0) {
- /* code 1100 */
- val = -10;
- len = 4;
- } else if ((i & 0xF0) == 0xD0) {
- /* code 1101 */
- val = 10;
- len = 4;
- } else if ((i & 0xF8) == 0xE0) {
- /* code 11100 */
- val = -15;
- len = 5;
- } else if ((i & 0xF8) == 0xE8) {
- /* code 11101 */
- val = 15;
- len = 5;
- } else if ((i & 0xFC) == 0xF0) {
- /* code 111100 */
- val = -20;
- len = 6;
- } else if ((i & 0xFC) == 0xF4) {
- /* code 111101 */
- val = 20;
- len = 6;
- } else if ((i & 0xF8) == 0xF8) {
- /* code 11111xxxxxx */
- is_abs = 1;
- val = 0;
- len = 5;
- }
- table[i].is_abs = is_abs;
- table[i].val = val;
- table[i].len = len;
- }
+static int sd_get_buff_size_op(struct gspca_dev *gspca_dev, int mode)
+{
+ switch (gspca_dev->cam.cam_mode[mode].width) {
+ case 176: /* 176x144 */
+ /* uncompressed, add 2 bytes / line for line header */
+ return (176 + 2) * 144;
+ case 352: /* 352x288 */
+ /* compressed */
+ return 352 * 288 / 2;
+ }
+ return -EIO; /* should never happen */
}
/* auto gain and exposure algorithm based on the knee algorithm described here:
@@ -517,245 +443,52 @@ static unsigned char *pac207_find_sof(st
return NULL;
}
-static int pac207_decompress_row(struct gspca_dev *gspca_dev,
- struct gspca_frame *f,
- __u8 *cdata,
- int len)
-{
- struct sd *sd = (struct sd *) gspca_dev;
- struct pac207_decoder_state *decoder_state = &sd->decoder_state;
- unsigned char *outp = decoder_state->line_decode_buf +
- decoder_state->line_read;
- int val, bitlen, bitpos = -decoder_state->no_remaining_bits;
- u8 code;
-
- /* first two pixels are stored as raw 8-bit */
- while (decoder_state->line_read < 2) {
- *outp++ = *cdata++;
- decoder_state->line_read++;
- len--;
- if (len == 0)
- return 0;
- }
-
- while (decoder_state->line_read < gspca_dev->width) {
- if (bitpos < 0) {
- code = decoder_state->remaining_bits << (8 + bitpos) |
- cdata[0] >> -bitpos;
- } else {
- u8 *addr = cdata + bitpos / 8;
- code = addr[0] << (bitpos & 7) |
- addr[1] >> (8 - (bitpos & 7));
- }
-
- bitlen = decoder_state->get_abs ?
- 6 : table[code].len;
-
- /* Stop decompressing if we're out of input data */
- if ((bitpos + bitlen) > (len * 8))
- break;
-
- if (decoder_state->get_abs) {
- *outp++ = code & 0xFC;
- decoder_state->line_read++;
- decoder_state->get_abs = 0;
- } else {
- if (table[code].is_abs) {
- decoder_state->get_abs = 1;
- } else {
- /* relative to left pixel */
- val = outp[-2] +
- table[code].val;
- if (val > 0xff)
- val = 0xff;
- else if (val < 0)
- val = 0;
- *outp++ = val;
- decoder_state->line_read++;
- }
- }
- bitpos += bitlen;
- }
-
- if (decoder_state->line_read == gspca_dev->width) {
- int compressed_line_len;
-
- gspca_frame_add(gspca_dev, INTER_PACKET, f,
- decoder_state->line_decode_buf,
- gspca_dev->width);
-
- /* completely decompressed line, round pos to nearest word */
- compressed_line_len = ((decoder_state->processed_bytes * 8 +
- bitpos + 15) / 16) * 2;
-
- len -= compressed_line_len - decoder_state->processed_bytes;
- if (len < 0) {
- decoder_state->discard_byte = 1;
- len = 0;
- }
- } else {
- decoder_state->processed_bytes += len;
- decoder_state->remaining_bits = cdata[bitpos/8];
- decoder_state->no_remaining_bits = (8 - bitpos) & 7;
- len = 0;
- }
-
- return len;
-}
-
-static void pac207_decode_line_init(struct gspca_dev *gspca_dev)
-{
- struct sd *sd = (struct sd *) gspca_dev;
- struct pac207_decoder_state *decoder_state = &sd->decoder_state;
-
- decoder_state->line_read = 0;
- decoder_state->line_state = LINE_HEADER1;
- decoder_state->processed_bytes = 0;
- decoder_state->no_remaining_bits = 0;
- decoder_state->get_abs = 0;
-}
-
-static void pac207_decode_frame_init(struct gspca_dev *gspca_dev)
-{
- struct sd *sd = (struct sd *) gspca_dev;
- struct pac207_decoder_state *decoder_state = &sd->decoder_state;
-
- decoder_state->header_read = 0;
- decoder_state->discard_byte = 0;
-
- pac207_decode_line_init(gspca_dev);
-}
-
-static int pac207_decode_frame_data(struct gspca_dev *gspca_dev,
- struct gspca_frame *f, unsigned char *data, int len)
-{
- struct sd *sd = (struct sd *) gspca_dev;
- struct pac207_decoder_state *decoder_state = &sd->decoder_state;
- int needed = 0;
-
- /* first 11 bytes after sof marker: frame header */
- if (decoder_state->header_read < 11) {
- /* get average lumination from frame header (byte 5) */
- if (decoder_state->header_read < 5) {
- needed = 5 - decoder_state->header_read;
- if (len >= needed)
- atomic_set(&sd->avg_lum, data[needed-1]);
- }
- /* skip the rest of the header */
- needed = 11 - decoder_state->header_read;
- if (len <= needed) {
- decoder_state->header_read += len;
- return 0;
- }
- data += needed;
- len -= needed;
- decoder_state->header_read = 11;
- }
-
- while (len) {
- if (decoder_state->discard_byte) {
- data++;
- len--;
- decoder_state->discard_byte = 0;
- continue;
- }
-
- switch (decoder_state->line_state) {
- case LINE_HEADER1:
- decoder_state->line_marker = data[0] << 8;
- decoder_state->line_state = LINE_HEADER2;
- needed = 1;
- break;
- case LINE_HEADER2:
- decoder_state->line_marker |= data[0];
- switch (decoder_state->line_marker) {
- case 0x0ff0:
- decoder_state->line_state = LINE_UNCOMPRESSED;
- break;
- case 0x1ee1:
- decoder_state->line_state = LINE_COMPRESSED;
- break;
- default:
- PDEBUG(D_STREAM,
- "Error unknown line-header %04X",
- (int) decoder_state->line_marker);
- gspca_dev->last_packet_type = DISCARD_PACKET;
- return 0;
- }
- needed = 1;
- break;
- case LINE_UNCOMPRESSED:
- needed = gspca_dev->width - decoder_state->line_read;
- if (needed > len)
- needed = len;
- gspca_frame_add(gspca_dev, INTER_PACKET, f, data,
- needed);
- decoder_state->line_read += needed;
- break;
- case LINE_COMPRESSED:
- needed = len -
- pac207_decompress_row(gspca_dev, f, data, len);
- break;
- }
-
- data += needed;
- len -= needed;
-
- if (decoder_state->line_read == gspca_dev->width) {
- if ((f->data_end - f->data) ==
- (gspca_dev->width * gspca_dev->height)) {
- /* eureka we've got a frame */
- return 1;
- }
- pac207_decode_line_init(gspca_dev);
- }
- }
-
- return 0;
-}
-
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
struct gspca_frame *frame,
__u8 *data,
int len)
{
+ struct sd *sd = (struct sd *) gspca_dev;
unsigned char *sof;
- int n;
sof = pac207_find_sof(gspca_dev, data, len);
-
if (sof) {
+ int n;
+
/* finish decoding current frame */
- if (gspca_dev->last_packet_type == INTER_PACKET) {
- n = sof - data;
- if (n > sizeof(pac207_sof_marker))
- n -= sizeof(pac207_sof_marker);
- else
- n = 0;
- n = pac207_decode_frame_data(gspca_dev, frame,
- data, n);
- if (n)
- frame = gspca_frame_add(gspca_dev,
- LAST_PACKET,
- frame,
- NULL,
- 0);
- else
- PDEBUG(D_STREAM, "Incomplete frame");
- }
- pac207_decode_frame_init(gspca_dev);
+ n = sof - data;
+ if (n > sizeof pac207_sof_marker)
+ n -= sizeof pac207_sof_marker;
+ else
+ n = 0;
+ frame = gspca_frame_add(gspca_dev, LAST_PACKET, frame,
+ data, n);
+ sd->header_read = 0;
gspca_frame_add(gspca_dev, FIRST_PACKET, frame, NULL, 0);
len -= sof - data;
data = sof;
}
-
- if (gspca_dev->last_packet_type == DISCARD_PACKET)
- return;
-
- n = pac207_decode_frame_data(gspca_dev, frame, data, len);
- if (n)
- gspca_frame_add(gspca_dev, LAST_PACKET,
- frame, NULL, 0);
+ if (sd->header_read < 11) {
+ int needed;
+
+ /* get average lumination from frame header (byte 5) */
+ if (sd->header_read < 5) {
+ needed = 5 - sd->header_read;
+ if (len >= needed)
+ atomic_set(&sd->avg_lum, data[needed - 1]);
+ }
+ /* skip the rest of the header */
+ needed = 11 - sd->header_read;
+ if (len <= needed) {
+ sd->header_read += len;
+ return;
+ }
+ data += needed;
+ len -= needed;
+ sd->header_read = 11;
+ }
+
+ gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
}
static void setbrightness(struct gspca_dev *gspca_dev)
@@ -891,6 +624,7 @@ static const struct sd_desc sd_desc = {
.close = sd_close,
.dq_callback = pac207_do_auto_gain,
.pkt_scan = sd_pkt_scan,
+ .get_buff_size = sd_get_buff_size_op,
};
/* -- module initialisation -- */
@@ -927,7 +661,6 @@ static struct usb_driver sd_driver = {
/* -- module insert / remove -- */
static int __init sd_mod_init(void)
{
- init_pixart_decoder();
if (usb_register(&sd_driver) < 0)
return -1;
PDEBUG(D_PROBE, "v%s registered", version);
diff -r facbd35d017f -r 8745ad321988 linux/include/linux/videodev2.h
--- a/linux/include/linux/videodev2.h Fri Jul 04 19:55:18 2008 +0200
+++ b/linux/include/linux/videodev2.h Fri Jul 04 20:29:32 2008 +0200
@@ -326,7 +326,8 @@ struct v4l2_pix_format
#define V4L2_PIX_FMT_PWC2 v4l2_fourcc('P','W','C','2') /* pwc newer webcam
*/
#define V4L2_PIX_FMT_ET61X251 v4l2_fourcc('E','6','2','5') /* ET61X251
compression */
#define V4L2_PIX_FMT_SPCA501 v4l2_fourcc('S','5','0','1') /* YUYV per line */
-#define V4L2_PIX_FMT_SPCA561 v4l2_fourcc('S','5','6','1') /* compressed BGGR
bayer */
+#define V4L2_PIX_FMT_SPCA561 v4l2_fourcc('S','5','6','1') /* compressed GBRG
bayer */
+#define V4L2_PIX_FMT_PAC207 v4l2_fourcc('P','2','0','7') /* compressed BGGR
bayer */
/*
* F O R M A T E N U M E R A T I O N
---
Patch is available at:
http://linuxtv.org/hg/v4l-dvb/rev/8745ad321988525d86bd18b40a06c2791bf4198a
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