diff options
Diffstat (limited to 'drivers/media/video')
-rw-r--r-- | drivers/media/video/gspca/gspca.c | 7 | ||||
-rw-r--r-- | drivers/media/video/gspca/gspca.h | 2 | ||||
-rw-r--r-- | drivers/media/video/gspca/pac207.c | 353 |
3 files changed, 51 insertions, 311 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index f6d216316b11..708270a46e1f 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -321,6 +321,7 @@ static int gspca_is_compressed(__u32 format) case V4L2_PIX_FMT_MJPEG: case V4L2_PIX_FMT_JPEG: case V4L2_PIX_FMT_SPCA561: + case V4L2_PIX_FMT_PAC207: return 1; } return 0; @@ -380,7 +381,8 @@ 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", @@ -395,6 +397,9 @@ 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 * get_v4l2_depth(gspca_dev->cam.cam_mode[mode].pixfmt) / 8; diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h index 0d23e0a90c77..05e8ee06071b 100644 --- a/drivers/media/video/gspca/gspca.h +++ b/drivers/media/video/gspca/gspca.h @@ -80,6 +80,7 @@ typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev, 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 --git a/drivers/media/video/gspca/pac207.c b/drivers/media/video/gspca/pac207.c index 7e067456e62b..0135ba599e81 100644 --- a/drivers/media/video/gspca/pac207.c +++ b/drivers/media/video/gspca/pac207.c @@ -58,34 +58,10 @@ 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; u8 brightness; @@ -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 *gspca_dev) { } -/* -- 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) +static int sd_get_buff_size_op(struct gspca_dev *gspca_dev, int mode) { - 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; + 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(struct gspca_dev *gspca_dev, 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 (sd->header_read < 11) { + int needed; - if (gspca_dev->last_packet_type == DISCARD_PACKET) - return; + /* 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; + } - n = pac207_decode_frame_data(gspca_dev, frame, data, len); - if (n) - gspca_frame_add(gspca_dev, LAST_PACKET, - frame, NULL, 0); + 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); |