diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-fileops.c')
-rw-r--r-- | drivers/media/video/cx18/cx18-fileops.c | 107 |
1 files changed, 57 insertions, 50 deletions
diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c index 055f6e004b2..b3889c0b269 100644 --- a/drivers/media/video/cx18/cx18-fileops.c +++ b/drivers/media/video/cx18/cx18-fileops.c @@ -128,15 +128,15 @@ static void cx18_release_stream(struct cx18_stream *s) static void cx18_dualwatch(struct cx18 *cx) { struct v4l2_tuner vt; - u16 new_bitmap; - u16 new_stereo_mode; - const u16 stereo_mask = 0x0300; - const u16 dual = 0x0200; + u32 new_bitmap; + u32 new_stereo_mode; + const u32 stereo_mask = 0x0300; + const u32 dual = 0x0200; u32 h; new_stereo_mode = cx->params.audio_properties & stereo_mask; memset(&vt, 0, sizeof(vt)); - cx18_call_i2c_clients(cx, VIDIOC_G_TUNER, &vt); + cx18_call_all(cx, tuner, g_tuner, &vt); if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) new_stereo_mode = dual; @@ -176,6 +176,8 @@ static struct cx18_buffer *cx18_get_buffer(struct cx18_stream *s, int non_block, *err = 0; while (1) { if (s->type == CX18_ENC_STREAM_TYPE_MPG) { + /* Process pending program info updates and pending + VBI data */ if (time_after(jiffies, cx->dualwatch_jiffies + msecs_to_jiffies(1000))) { cx->dualwatch_jiffies = jiffies; @@ -186,7 +188,6 @@ static struct cx18_buffer *cx18_get_buffer(struct cx18_stream *s, int non_block, while ((buf = cx18_dequeue(s_vbi, &s_vbi->q_full))) { /* byteswap and process VBI data */ cx18_process_vbi_data(cx, buf, - s_vbi->dma_pts, s_vbi->type); cx18_stream_put_buf_fw(s_vbi, buf); } @@ -207,8 +208,7 @@ static struct cx18_buffer *cx18_get_buffer(struct cx18_stream *s, int non_block, cx18_buf_swap(buf); else { /* byteswap and process VBI data */ - cx18_process_vbi_data(cx, buf, - s->dma_pts, s->type); + cx18_process_vbi_data(cx, buf, s->type); } return buf; } @@ -260,6 +260,20 @@ static size_t cx18_copy_buf_to_user(struct cx18_stream *s, len = ucount; if (cx->vbi.insert_mpeg && s->type == CX18_ENC_STREAM_TYPE_MPG && !cx18_raw_vbi(cx) && buf != &cx->vbi.sliced_mpeg_buf) { + /* + * Try to find a good splice point in the PS, just before + * an MPEG-2 Program Pack start code, and provide only + * up to that point to the user, so it's easy to insert VBI data + * the next time around. + */ + /* FIXME - This only works for an MPEG-2 PS, not a TS */ + /* + * An MPEG-2 Program Stream (PS) is a series of + * MPEG-2 Program Packs terminated by an + * MPEG Program End Code after the last Program Pack. + * A Program Pack may hold a PS System Header packet and any + * number of Program Elementary Stream (PES) Packets + */ const char *start = buf->buf + buf->readpos; const char *p = start + 1; const u8 *q; @@ -267,38 +281,54 @@ static size_t cx18_copy_buf_to_user(struct cx18_stream *s, int stuffing, i; while (start + len > p) { + /* Scan for a 0 to find a potential MPEG-2 start code */ q = memchr(p, 0, start + len - p); if (q == NULL) break; p = q + 1; + /* + * Keep looking if not a + * MPEG-2 Pack header start code: 0x00 0x00 0x01 0xba + * or MPEG-2 video PES start code: 0x00 0x00 0x01 0xe0 + */ if ((char *)q + 15 >= buf->buf + buf->bytesused || q[1] != 0 || q[2] != 1 || q[3] != ch) continue; + + /* If expecting the primary video PES */ if (!cx->search_pack_header) { + /* Continue if it couldn't be a PES packet */ if ((q[6] & 0xc0) != 0x80) continue; - if (((q[7] & 0xc0) == 0x80 && - (q[9] & 0xf0) == 0x20) || - ((q[7] & 0xc0) == 0xc0 && - (q[9] & 0xf0) == 0x30)) { - ch = 0xba; + /* Check if a PTS or PTS & DTS follow */ + if (((q[7] & 0xc0) == 0x80 && /* PTS only */ + (q[9] & 0xf0) == 0x20) || /* PTS only */ + ((q[7] & 0xc0) == 0xc0 && /* PTS & DTS */ + (q[9] & 0xf0) == 0x30)) { /* DTS follows */ + /* Assume we found the video PES hdr */ + ch = 0xba; /* next want a Program Pack*/ cx->search_pack_header = 1; - p = q + 9; + p = q + 9; /* Skip this video PES hdr */ } continue; } + + /* We may have found a Program Pack start code */ + + /* Get the count of stuffing bytes & verify them */ stuffing = q[13] & 7; /* all stuffing bytes must be 0xff */ for (i = 0; i < stuffing; i++) if (q[14 + i] != 0xff) break; - if (i == stuffing && - (q[4] & 0xc4) == 0x44 && - (q[12] & 3) == 3 && - q[14 + stuffing] == 0 && + if (i == stuffing && /* right number of stuffing bytes*/ + (q[4] & 0xc4) == 0x44 && /* marker check */ + (q[12] & 3) == 3 && /* marker check */ + q[14 + stuffing] == 0 && /* PES Pack or Sys Hdr */ q[15 + stuffing] == 0 && q[16 + stuffing] == 1) { - cx->search_pack_header = 0; + /* We declare we actually found a Program Pack*/ + cx->search_pack_header = 0; /* expect vid PES */ len = (char *)q - start; cx18_setup_sliced_vbi_buf(cx); break; @@ -578,7 +608,7 @@ int cx18_v4l2_close(struct file *filp) /* Mark that the radio is no longer in use */ clear_bit(CX18_F_I_RADIO_USER, &cx->i_flags); /* Switch tuner to TV */ - cx18_call_i2c_clients(cx, VIDIOC_S_STD, &cx->std); + cx18_call_all(cx, core, s_std, cx->std); /* Select correct audio input (i.e. TV tuner or Line in) */ cx18_audio_set_io(cx); if (atomic_read(&cx->ana_capturing) > 0) { @@ -641,7 +671,7 @@ static int cx18_serialized_open(struct cx18_stream *s, struct file *filp) /* We have the radio */ cx18_mute(cx); /* Switch tuner to radio */ - cx18_call_i2c_clients(cx, AUDC_SET_RADIO, NULL); + cx18_call_all(cx, tuner, s_radio); /* Select the correct audio input (i.e. radio tuner) */ cx18_audio_set_io(cx); /* Done! Unmute and continue. */ @@ -652,38 +682,15 @@ static int cx18_serialized_open(struct cx18_stream *s, struct file *filp) int cx18_v4l2_open(struct file *filp) { - int res, x, y = 0; - struct cx18 *cx = NULL; - struct cx18_stream *s = NULL; - int minor = video_devdata(filp)->minor; - - /* Find which card this open was on */ - spin_lock(&cx18_cards_lock); - for (x = 0; cx == NULL && x < cx18_cards_active; x++) { - /* find out which stream this open was on */ - for (y = 0; y < CX18_MAX_STREAMS; y++) { - if (cx18_cards[x] == NULL) - continue; - s = &cx18_cards[x]->streams[y]; - if (s->v4l2dev && s->v4l2dev->minor == minor) { - cx = cx18_cards[x]; - break; - } - } - } - spin_unlock(&cx18_cards_lock); - - if (cx == NULL) { - /* Couldn't find a device registered - on that minor, shouldn't happen! */ - printk(KERN_WARNING "No cx18 device found on minor %d\n", - minor); - return -ENXIO; - } + int res; + struct video_device *video_dev = video_devdata(filp); + struct cx18_stream *s = video_get_drvdata(video_dev); + struct cx18 *cx = s->cx;; mutex_lock(&cx->serialize_lock); if (cx18_init_on_first_open(cx)) { - CX18_ERR("Failed to initialize on minor %d\n", minor); + CX18_ERR("Failed to initialize on minor %d\n", + video_dev->minor); mutex_unlock(&cx->serialize_lock); return -ENXIO; } |