V4L/DVB: tm6000: rewrite copy_streams
Merge function copy streams() and copy_packets() into a new function copy_streams(), fixing the bugs. Signed-off-by: Stefan Ringel <stefan.ringel@arcor.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Stefan Ringel
Mauro Carvalho Chehab
Родитель
3b23db39b4
Коммит
83cb9a504c
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@ -39,7 +39,7 @@ struct usb_isoc_ctl {
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int pos, size, pktsize;
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/* Last field: ODD or EVEN? */
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int field;
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int vfield;
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/* Stores incomplete commands */
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u32 tmp_buf;
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@ -47,7 +47,4 @@ struct usb_isoc_ctl {
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/* Stores already requested buffers */
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struct tm6000_buffer *buf;
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/* Stores the number of received fields */
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int nfields;
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};
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@ -186,111 +186,104 @@ const char *tm6000_msg_type[] = {
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/*
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* Identify the tm5600/6000 buffer header type and properly handles
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*/
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static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp,
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u8 *out_p, struct tm6000_buffer **buf)
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static int copy_streams(u8 *data, unsigned long len,
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struct urb *urb)
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{
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struct tm6000_dmaqueue *dma_q = urb->context;
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struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
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u8 c;
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unsigned int cmd, cpysize, pktsize, size, field, block, line, pos = 0;
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u8 *ptr=data, *endp=data+len, c;
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unsigned long header=0;
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int rc=0;
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/* FIXME: move to tm6000-isoc */
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static int last_line = -2, start_line = -2, last_field = -2;
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unsigned int cmd, cpysize, pktsize, size, field, block, line, pos = 0;
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struct tm6000_buffer *vbuf;
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char *voutp = NULL;
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unsigned int linewidth;
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/* FIXME: this is the hardcoded window size
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*/
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unsigned int linewidth = (*buf)->vb.width << 1;
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/* get video buffer */
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get_next_buf (dma_q, &vbuf);
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if (!vbuf)
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return rc;
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voutp = videobuf_to_vmalloc(&vbuf->vb);
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if (!voutp)
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return 0;
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for (ptr = data; ptr < endp;) {
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if (!dev->isoc_ctl.cmd) {
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c = (header >> 24) & 0xff;
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/* Header */
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if (dev->isoc_ctl.tmp_buf_len > 0) {
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/* from last urb or packet */
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header = dev->isoc_ctl.tmp_buf;
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if (4 - dev->isoc_ctl.tmp_buf_len > 0) {
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memcpy ((u8 *)&header +
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dev->isoc_ctl.tmp_buf_len,
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ptr,
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4 - dev->isoc_ctl.tmp_buf_len);
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ptr += 4 - dev->isoc_ctl.tmp_buf_len;
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}
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dev->isoc_ctl.tmp_buf_len = 0;
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} else {
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if (ptr + 3 >= endp) {
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/* have incomplete header */
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dev->isoc_ctl.tmp_buf_len = endp - ptr;
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memcpy (&dev->isoc_ctl.tmp_buf, ptr,
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dev->isoc_ctl.tmp_buf_len);
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return rc;
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}
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/* Seek for sync */
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for (; ptr < endp - 3; ptr++) {
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if (*(ptr + 3) == 0x47)
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break;
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}
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/* Get message header */
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header = *(unsigned long *)ptr;
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ptr += 4;
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}
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/* split the header fields */
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c = (header >> 24) & 0xff;
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size = ((header & 0x7e) << 1);
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if (size > 0)
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size -= 4;
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block = (header >> 7) & 0xf;
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field = (header >> 11) & 0x1;
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line = (header >> 12) & 0x1ff;
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cmd = (header >> 21) & 0x7;
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/* Validates header fields */
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/* Validates haeder fields */
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if (size > TM6000_URB_MSG_LEN)
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size = TM6000_URB_MSG_LEN;
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if (cmd == TM6000_URB_MSG_VIDEO) {
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if ((block+1)*TM6000_URB_MSG_LEN>linewidth)
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cmd = TM6000_URB_MSG_ERR;
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/* FIXME: Mounts the image as field0+field1
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* It should, instead, check if the user selected
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* entrelaced or non-entrelaced mode
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pktsize = TM6000_URB_MSG_LEN;
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/* calculate position in buffer
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* and change the buffer
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*/
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pos = ((line << 1) - field - 1) * linewidth +
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block * TM6000_URB_MSG_LEN;
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/* Don't allow to write out of the buffer */
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if (pos+TM6000_URB_MSG_LEN > (*buf)->vb.size) {
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dprintk(dev, V4L2_DEBUG_ISOC,
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"ERR: size=%d, num=%d, line=%d, "
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"field=%d\n",
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size, block, line, field);
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cmd = TM6000_URB_MSG_ERR;
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}
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} else {
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pos=0;
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}
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/* Prints debug info */
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dprintk(dev, V4L2_DEBUG_ISOC, "size=%d, num=%d, "
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" line=%d, field=%d\n",
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size, block, line, field);
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if ((last_line!=line)&&(last_line+1!=line) &&
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(cmd != TM6000_URB_MSG_ERR) ) {
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if (cmd != TM6000_URB_MSG_VIDEO) {
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dprintk(dev, V4L2_DEBUG_ISOC, "cmd=%d, "
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"size=%d, num=%d, line=%d, field=%d\n",
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cmd, size, block, line, field);
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}
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if (start_line<0)
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start_line=last_line;
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/* Prints debug info */
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dprintk(dev, V4L2_DEBUG_ISOC, "lines= %d-%d, "
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"field=%d\n",
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start_line, last_line, field);
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if ((start_line<6 && last_line>200) &&
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(last_field != field) ) {
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dev->isoc_ctl.nfields++;
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if (dev->isoc_ctl.nfields>=2) {
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dev->isoc_ctl.nfields=0;
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/* Announces that a new buffer were filled */
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buffer_filled (dev, dma_q, *buf);
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switch (cmd) {
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case TM6000_URB_MSG_VIDEO:
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if ((dev->isoc_ctl.vfield != field) &&
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(field == 1)) {
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/* Announces that a new buffer
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* were filled
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*/
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buffer_filled (dev, dma_q, vbuf);
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dprintk (dev, V4L2_DEBUG_ISOC,
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"new buffer filled\n");
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get_next_buf (dma_q, buf);
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if (!*buf)
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get_next_buf (dma_q, &vbuf);
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if (!vbuf)
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return rc;
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out_p = videobuf_to_vmalloc(&((*buf)->vb));
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if (!out_p)
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voutp = videobuf_to_vmalloc (&vbuf->vb);
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if (!voutp)
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return rc;
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pos = dev->isoc_ctl.pos = 0;
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}
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linewidth = vbuf->vb.width << 1;
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pos = ((line << 1) - field - 1) * linewidth +
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block * TM6000_URB_MSG_LEN;
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/* Don't allow to write out of the buffer */
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if (pos + size > vbuf->vb.size)
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cmd = TM6000_URB_MSG_ERR;
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dev->isoc_ctl.vfield = field;
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break;
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case TM6000_URB_MSG_AUDIO:
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case TM6000_URB_MSG_VBI:
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case TM6000_URB_MSG_PTS:
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break;
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}
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start_line=line;
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last_field=field;
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}
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if (cmd == TM6000_URB_MSG_VIDEO)
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last_line = line;
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pktsize = TM6000_URB_MSG_LEN;
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} else {
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/* Continue the last copy */
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cmd = dev->isoc_ctl.cmd;
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@ -298,124 +291,43 @@ static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp,
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pos = dev->isoc_ctl.pos;
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pktsize = dev->isoc_ctl.pktsize;
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}
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cpysize = (endp-(*ptr) > size) ? size : endp - *ptr;
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cpysize = (endp - ptr > size) ? size : endp - ptr;
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if (cpysize) {
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/* handles each different URB message */
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/* copy data in different buffers */
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switch (cmd) {
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case TM6000_URB_MSG_VIDEO:
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/* Fills video buffer */
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memcpy(&out_p[pos], *ptr, cpysize);
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break;
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case TM6000_URB_MSG_PTS:
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if (vbuf)
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memcpy (&voutp[pos], ptr, cpysize);
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break;
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case TM6000_URB_MSG_AUDIO:
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/* Need some code to process audio */
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printk ("%ld: cmd=%s, size=%d\n", jiffies,
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tm6000_msg_type[cmd],size);
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/* Need some code to copy audio buffer */
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break;
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case TM6000_URB_MSG_VBI:
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/* Need some code to copy vbi buffer */
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break;
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case TM6000_URB_MSG_PTS:
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/* Need some code to copy pts */
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break;
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default:
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dprintk (dev, V4L2_DEBUG_ISOC, "cmd=%s, size=%d\n",
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tm6000_msg_type[cmd],size);
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}
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}
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if (cpysize<size) {
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if (ptr + pktsize > endp) {
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/* End of URB packet, but cmd processing is not
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* complete. Preserve the state for a next packet
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*/
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dev->isoc_ctl.pos = pos + cpysize;
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dev->isoc_ctl.size = size - cpysize;
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dev->isoc_ctl.cmd = cmd;
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dev->isoc_ctl.pktsize = pktsize-cpysize;
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(*ptr)+=cpysize;
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dev->isoc_ctl.pktsize = pktsize - (endp - ptr);
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ptr += endp - ptr;
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} else {
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dev->isoc_ctl.cmd = 0;
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(*ptr)+=pktsize;
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}
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return rc;
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}
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static int copy_streams(u8 *data, unsigned long len,
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struct urb *urb)
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{
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struct tm6000_dmaqueue *dma_q = urb->context;
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struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
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u8 *ptr=data, *endp=data+len;
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unsigned long header=0;
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int rc=0;
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struct tm6000_buffer *buf;
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char *outp = NULL;
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get_next_buf(dma_q, &buf);
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if (buf)
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outp = videobuf_to_vmalloc(&buf->vb);
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if (!outp)
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return 0;
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for (ptr=data; ptr<endp;) {
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if (!dev->isoc_ctl.cmd) {
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u8 *p=(u8 *)&dev->isoc_ctl.tmp_buf;
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/* FIXME: This seems very complex
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* It just recovers up to 3 bytes of the header that
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* might be at the previous packet
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*/
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if (dev->isoc_ctl.tmp_buf_len) {
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while (dev->isoc_ctl.tmp_buf_len) {
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if ( *(ptr+3-dev->isoc_ctl.tmp_buf_len) == 0x47) {
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break;
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}
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p++;
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dev->isoc_ctl.tmp_buf_len--;
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}
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if (dev->isoc_ctl.tmp_buf_len) {
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memcpy(&header, p,
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dev->isoc_ctl.tmp_buf_len);
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memcpy((u8 *)&header +
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dev->isoc_ctl.tmp_buf_len,
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ptr,
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4 - dev->isoc_ctl.tmp_buf_len);
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ptr += 4 - dev->isoc_ctl.tmp_buf_len;
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goto HEADER;
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ptr += pktsize;
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}
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}
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/* Seek for sync */
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for (;ptr<endp-3;ptr++) {
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if (*(ptr+3)==0x47)
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break;
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}
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if (ptr+3>=endp) {
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dev->isoc_ctl.tmp_buf_len=endp-ptr;
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memcpy (&dev->isoc_ctl.tmp_buf,ptr,
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dev->isoc_ctl.tmp_buf_len);
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dev->isoc_ctl.cmd=0;
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return rc;
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}
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/* Get message header */
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header=*(unsigned long *)ptr;
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ptr+=4;
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}
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HEADER:
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/* Copy or continue last copy */
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rc=copy_packet(urb,header,&ptr,endp,outp,&buf);
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if (rc<0) {
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buf=NULL;
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printk(KERN_ERR "tm6000: buffer underrun at %ld\n",
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jiffies);
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return rc;
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}
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if (!buf)
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return 0;
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}
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return 0;
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}
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/*
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* Identify the tm5600/6000 buffer header type and properly handles
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*/
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@ -510,7 +422,6 @@ static inline int tm6000_isoc_copy(struct urb *urb)
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{
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struct tm6000_dmaqueue *dma_q = urb->context;
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struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq);
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struct tm6000_buffer *buf;
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int i, len=0, rc=1, status;
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char *p;
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@ -585,7 +496,6 @@ static void tm6000_uninit_isoc(struct tm6000_core *dev)
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struct urb *urb;
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int i;
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dev->isoc_ctl.nfields = -1;
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dev->isoc_ctl.buf = NULL;
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for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
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urb=dev->isoc_ctl.urb[i];
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@ -610,8 +520,6 @@ static void tm6000_uninit_isoc(struct tm6000_core *dev)
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dev->isoc_ctl.urb=NULL;
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dev->isoc_ctl.transfer_buffer=NULL;
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dev->isoc_ctl.num_bufs = 0;
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dev->isoc_ctl.num_bufs=0;
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}
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/*
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