| /* |
| file operation functions |
| Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> |
| Copyright (C) 2004 Chris Kennedy <c@groovy.org> |
| Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include "ivtv-driver.h" |
| #include "ivtv-fileops.h" |
| #include "ivtv-i2c.h" |
| #include "ivtv-queue.h" |
| #include "ivtv-udma.h" |
| #include "ivtv-irq.h" |
| #include "ivtv-vbi.h" |
| #include "ivtv-mailbox.h" |
| #include "ivtv-routing.h" |
| #include "ivtv-streams.h" |
| #include "ivtv-yuv.h" |
| #include "ivtv-ioctl.h" |
| #include "ivtv-cards.h" |
| #include <media/saa7115.h> |
| |
| /* This function tries to claim the stream for a specific file descriptor. |
| If no one else is using this stream then the stream is claimed and |
| associated VBI streams are also automatically claimed. |
| Possible error returns: -EBUSY if someone else has claimed |
| the stream or 0 on success. */ |
| int ivtv_claim_stream(struct ivtv_open_id *id, int type) |
| { |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[type]; |
| struct ivtv_stream *s_vbi; |
| int vbi_type; |
| |
| if (test_and_set_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { |
| /* someone already claimed this stream */ |
| if (s->id == id->open_id) { |
| /* yes, this file descriptor did. So that's OK. */ |
| return 0; |
| } |
| if (s->id == -1 && (type == IVTV_DEC_STREAM_TYPE_VBI || |
| type == IVTV_ENC_STREAM_TYPE_VBI)) { |
| /* VBI is handled already internally, now also assign |
| the file descriptor to this stream for external |
| reading of the stream. */ |
| s->id = id->open_id; |
| IVTV_DEBUG_INFO("Start Read VBI\n"); |
| return 0; |
| } |
| /* someone else is using this stream already */ |
| IVTV_DEBUG_INFO("Stream %d is busy\n", type); |
| return -EBUSY; |
| } |
| s->id = id->open_id; |
| if (type == IVTV_DEC_STREAM_TYPE_VBI) { |
| /* Enable reinsertion interrupt */ |
| ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); |
| } |
| |
| /* IVTV_DEC_STREAM_TYPE_MPG needs to claim IVTV_DEC_STREAM_TYPE_VBI, |
| IVTV_ENC_STREAM_TYPE_MPG needs to claim IVTV_ENC_STREAM_TYPE_VBI |
| (provided VBI insertion is on and sliced VBI is selected), for all |
| other streams we're done */ |
| if (type == IVTV_DEC_STREAM_TYPE_MPG) { |
| vbi_type = IVTV_DEC_STREAM_TYPE_VBI; |
| } else if (type == IVTV_ENC_STREAM_TYPE_MPG && |
| itv->vbi.insert_mpeg && itv->vbi.sliced_in->service_set) { |
| vbi_type = IVTV_ENC_STREAM_TYPE_VBI; |
| } else { |
| return 0; |
| } |
| s_vbi = &itv->streams[vbi_type]; |
| |
| if (!test_and_set_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags)) { |
| /* Enable reinsertion interrupt */ |
| if (vbi_type == IVTV_DEC_STREAM_TYPE_VBI) |
| ivtv_clear_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); |
| } |
| /* mark that it is used internally */ |
| set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags); |
| return 0; |
| } |
| |
| /* This function releases a previously claimed stream. It will take into |
| account associated VBI streams. */ |
| void ivtv_release_stream(struct ivtv_stream *s) |
| { |
| struct ivtv *itv = s->itv; |
| struct ivtv_stream *s_vbi; |
| |
| s->id = -1; |
| if ((s->type == IVTV_DEC_STREAM_TYPE_VBI || s->type == IVTV_ENC_STREAM_TYPE_VBI) && |
| test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { |
| /* this stream is still in use internally */ |
| return; |
| } |
| if (!test_and_clear_bit(IVTV_F_S_CLAIMED, &s->s_flags)) { |
| IVTV_DEBUG_WARN("Release stream %s not in use!\n", s->name); |
| return; |
| } |
| |
| ivtv_flush_queues(s); |
| |
| /* disable reinsertion interrupt */ |
| if (s->type == IVTV_DEC_STREAM_TYPE_VBI) |
| ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); |
| |
| /* IVTV_DEC_STREAM_TYPE_MPG needs to release IVTV_DEC_STREAM_TYPE_VBI, |
| IVTV_ENC_STREAM_TYPE_MPG needs to release IVTV_ENC_STREAM_TYPE_VBI, |
| for all other streams we're done */ |
| if (s->type == IVTV_DEC_STREAM_TYPE_MPG) |
| s_vbi = &itv->streams[IVTV_DEC_STREAM_TYPE_VBI]; |
| else if (s->type == IVTV_ENC_STREAM_TYPE_MPG) |
| s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; |
| else |
| return; |
| |
| /* clear internal use flag */ |
| if (!test_and_clear_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags)) { |
| /* was already cleared */ |
| return; |
| } |
| if (s_vbi->id != -1) { |
| /* VBI stream still claimed by a file descriptor */ |
| return; |
| } |
| /* disable reinsertion interrupt */ |
| if (s_vbi->type == IVTV_DEC_STREAM_TYPE_VBI) |
| ivtv_set_irq_mask(itv, IVTV_IRQ_DEC_VBI_RE_INSERT); |
| clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags); |
| ivtv_flush_queues(s_vbi); |
| } |
| |
| static void ivtv_dualwatch(struct ivtv *itv) |
| { |
| struct v4l2_tuner vt; |
| u16 new_bitmap; |
| u16 new_stereo_mode; |
| const u16 stereo_mask = 0x0300; |
| const u16 dual = 0x0200; |
| |
| new_stereo_mode = itv->params.audio_properties & stereo_mask; |
| memset(&vt, 0, sizeof(vt)); |
| ivtv_call_i2c_clients(itv, VIDIOC_G_TUNER, &vt); |
| if (vt.audmode == V4L2_TUNER_MODE_LANG1_LANG2 && (vt.rxsubchans & V4L2_TUNER_SUB_LANG2)) |
| new_stereo_mode = dual; |
| |
| if (new_stereo_mode == itv->dualwatch_stereo_mode) |
| return; |
| |
| new_bitmap = new_stereo_mode | (itv->params.audio_properties & ~stereo_mask); |
| |
| IVTV_DEBUG_INFO("dualwatch: change stereo flag from 0x%x to 0x%x. new audio_bitmask=0x%ux\n", |
| itv->dualwatch_stereo_mode, new_stereo_mode, new_bitmap); |
| |
| if (ivtv_vapi(itv, CX2341X_ENC_SET_AUDIO_PROPERTIES, 1, new_bitmap) == 0) { |
| itv->dualwatch_stereo_mode = new_stereo_mode; |
| return; |
| } |
| IVTV_DEBUG_INFO("dualwatch: changing stereo flag failed\n"); |
| } |
| |
| static void ivtv_update_pgm_info(struct ivtv *itv) |
| { |
| u32 wr_idx = (read_enc(itv->pgm_info_offset) - itv->pgm_info_offset - 4) / 24; |
| int cnt; |
| int i = 0; |
| |
| if (wr_idx >= itv->pgm_info_num) { |
| IVTV_DEBUG_WARN("Invalid PGM index %d (>= %d)\n", wr_idx, itv->pgm_info_num); |
| return; |
| } |
| cnt = (wr_idx + itv->pgm_info_num - itv->pgm_info_write_idx) % itv->pgm_info_num; |
| while (i < cnt) { |
| int idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; |
| struct v4l2_enc_idx_entry *e = itv->pgm_info + idx; |
| u32 addr = itv->pgm_info_offset + 4 + idx * 24; |
| const int mapping[8] = { -1, V4L2_ENC_IDX_FRAME_I, V4L2_ENC_IDX_FRAME_P, -1, |
| V4L2_ENC_IDX_FRAME_B, -1, -1, -1 }; |
| // 1=I, 2=P, 4=B |
| |
| e->offset = read_enc(addr + 4) + ((u64)read_enc(addr + 8) << 32); |
| if (e->offset > itv->mpg_data_received) { |
| break; |
| } |
| e->offset += itv->vbi_data_inserted; |
| e->length = read_enc(addr); |
| e->pts = read_enc(addr + 16) + ((u64)(read_enc(addr + 20) & 1) << 32); |
| e->flags = mapping[read_enc(addr + 12) & 7]; |
| i++; |
| } |
| itv->pgm_info_write_idx = (itv->pgm_info_write_idx + i) % itv->pgm_info_num; |
| } |
| |
| static struct ivtv_buffer *ivtv_get_buffer(struct ivtv_stream *s, int non_block, int *err) |
| { |
| struct ivtv *itv = s->itv; |
| struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; |
| struct ivtv_buffer *buf; |
| DEFINE_WAIT(wait); |
| |
| *err = 0; |
| while (1) { |
| if (s->type == IVTV_ENC_STREAM_TYPE_MPG) { |
| /* Process pending program info updates and pending VBI data */ |
| ivtv_update_pgm_info(itv); |
| |
| if (jiffies - itv->dualwatch_jiffies > msecs_to_jiffies(1000)) { |
| itv->dualwatch_jiffies = jiffies; |
| ivtv_dualwatch(itv); |
| } |
| |
| if (test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && |
| !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { |
| while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) { |
| /* byteswap and process VBI data */ |
| ivtv_process_vbi_data(itv, buf, s_vbi->dma_pts, s_vbi->type); |
| ivtv_enqueue(s_vbi, buf, &s_vbi->q_free); |
| } |
| } |
| buf = &itv->vbi.sliced_mpeg_buf; |
| if (buf->readpos != buf->bytesused) { |
| return buf; |
| } |
| } |
| |
| /* do we have leftover data? */ |
| buf = ivtv_dequeue(s, &s->q_io); |
| if (buf) |
| return buf; |
| |
| /* do we have new data? */ |
| buf = ivtv_dequeue(s, &s->q_full); |
| if (buf) { |
| if ((buf->b_flags & IVTV_F_B_NEED_BUF_SWAP) == 0) |
| return buf; |
| buf->b_flags &= ~IVTV_F_B_NEED_BUF_SWAP; |
| if (s->type == IVTV_ENC_STREAM_TYPE_MPG) |
| /* byteswap MPG data */ |
| ivtv_buf_swap(buf); |
| else if (s->type != IVTV_DEC_STREAM_TYPE_VBI) { |
| /* byteswap and process VBI data */ |
| ivtv_process_vbi_data(itv, buf, s->dma_pts, s->type); |
| } |
| return buf; |
| } |
| |
| /* return if end of stream */ |
| if (s->type != IVTV_DEC_STREAM_TYPE_VBI && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { |
| IVTV_DEBUG_INFO("EOS %s\n", s->name); |
| return NULL; |
| } |
| |
| /* return if file was opened with O_NONBLOCK */ |
| if (non_block) { |
| *err = -EAGAIN; |
| return NULL; |
| } |
| |
| /* wait for more data to arrive */ |
| prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); |
| /* New buffers might have become available before we were added to the waitqueue */ |
| if (!s->q_full.buffers) |
| schedule(); |
| finish_wait(&s->waitq, &wait); |
| if (signal_pending(current)) { |
| /* return if a signal was received */ |
| IVTV_DEBUG_INFO("User stopped %s\n", s->name); |
| *err = -EINTR; |
| return NULL; |
| } |
| } |
| } |
| |
| static void ivtv_setup_sliced_vbi_buf(struct ivtv *itv) |
| { |
| int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; |
| |
| itv->vbi.sliced_mpeg_buf.buf = itv->vbi.sliced_mpeg_data[idx]; |
| itv->vbi.sliced_mpeg_buf.bytesused = itv->vbi.sliced_mpeg_size[idx]; |
| itv->vbi.sliced_mpeg_buf.readpos = 0; |
| } |
| |
| static size_t ivtv_copy_buf_to_user(struct ivtv_stream *s, struct ivtv_buffer *buf, |
| char __user *ubuf, size_t ucount) |
| { |
| struct ivtv *itv = s->itv; |
| size_t len = buf->bytesused - buf->readpos; |
| |
| if (len > ucount) len = ucount; |
| if (itv->vbi.insert_mpeg && s->type == IVTV_ENC_STREAM_TYPE_MPG && |
| itv->vbi.sliced_in->service_set && buf != &itv->vbi.sliced_mpeg_buf) { |
| const char *start = buf->buf + buf->readpos; |
| const char *p = start + 1; |
| const u8 *q; |
| u8 ch = itv->search_pack_header ? 0xba : 0xe0; |
| int stuffing, i; |
| |
| while (start + len > p && (q = memchr(p, 0, start + len - p))) { |
| p = q + 1; |
| if ((char *)q + 15 >= buf->buf + buf->bytesused || |
| q[1] != 0 || q[2] != 1 || q[3] != ch) { |
| continue; |
| } |
| if (!itv->search_pack_header) { |
| 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; |
| itv->search_pack_header = 1; |
| p = q + 9; |
| } |
| continue; |
| } |
| 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 && q[15 + stuffing] == 0 && |
| q[16 + stuffing] == 1) { |
| itv->search_pack_header = 0; |
| len = (char *)q - start; |
| ivtv_setup_sliced_vbi_buf(itv); |
| break; |
| } |
| } |
| } |
| if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) { |
| IVTV_DEBUG_WARN("copy %zd bytes to user failed for %s\n", len, s->name); |
| return -EFAULT; |
| } |
| /*IVTV_INFO("copied %lld %d %d %d %d %d vbi %d\n", itv->mpg_data_received, len, ucount, |
| buf->readpos, buf->bytesused, buf->bytesused - buf->readpos - len, |
| buf == &itv->vbi.sliced_mpeg_buf); */ |
| buf->readpos += len; |
| if (s->type == IVTV_ENC_STREAM_TYPE_MPG && buf != &itv->vbi.sliced_mpeg_buf) |
| itv->mpg_data_received += len; |
| return len; |
| } |
| |
| static ssize_t ivtv_read(struct ivtv_stream *s, char __user *ubuf, size_t tot_count, int non_block) |
| { |
| struct ivtv *itv = s->itv; |
| size_t tot_written = 0; |
| int single_frame = 0; |
| |
| if (atomic_read(&itv->capturing) == 0 && s->id == -1) { |
| /* shouldn't happen */ |
| IVTV_DEBUG_WARN("Stream %s not initialized before read\n", s->name); |
| return -EIO; |
| } |
| |
| /* Each VBI buffer is one frame, the v4l2 API says that for VBI the frames should |
| arrive one-by-one, so make sure we never output more than one VBI frame at a time */ |
| if (s->type == IVTV_DEC_STREAM_TYPE_VBI || |
| (s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set)) |
| single_frame = 1; |
| |
| for (;;) { |
| struct ivtv_buffer *buf; |
| int rc; |
| |
| buf = ivtv_get_buffer(s, non_block, &rc); |
| /* if there is no data available... */ |
| if (buf == NULL) { |
| /* if we got data, then return that regardless */ |
| if (tot_written) |
| break; |
| /* EOS condition */ |
| if (rc == 0) { |
| clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); |
| clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| ivtv_release_stream(s); |
| } |
| /* set errno */ |
| return rc; |
| } |
| rc = ivtv_copy_buf_to_user(s, buf, ubuf + tot_written, tot_count - tot_written); |
| if (buf != &itv->vbi.sliced_mpeg_buf) { |
| ivtv_enqueue(s, buf, (buf->readpos == buf->bytesused) ? &s->q_free : &s->q_io); |
| } |
| else if (buf->readpos == buf->bytesused) { |
| int idx = itv->vbi.inserted_frame % IVTV_VBI_FRAMES; |
| itv->vbi.sliced_mpeg_size[idx] = 0; |
| itv->vbi.inserted_frame++; |
| itv->vbi_data_inserted += buf->bytesused; |
| } |
| if (rc < 0) |
| return rc; |
| tot_written += rc; |
| |
| if (tot_written == tot_count || single_frame) |
| break; |
| } |
| return tot_written; |
| } |
| |
| static ssize_t ivtv_read_pos(struct ivtv_stream *s, char __user *ubuf, size_t count, |
| loff_t *pos, int non_block) |
| { |
| ssize_t rc = count ? ivtv_read(s, ubuf, count, non_block) : 0; |
| struct ivtv *itv = s->itv; |
| |
| IVTV_DEBUG_HI_FILE("read %zd from %s, got %zd\n", count, s->name, rc); |
| if (rc > 0) |
| pos += rc; |
| return rc; |
| } |
| |
| int ivtv_start_capture(struct ivtv_open_id *id) |
| { |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| struct ivtv_stream *s_vbi; |
| |
| if (s->type == IVTV_ENC_STREAM_TYPE_RAD || |
| s->type == IVTV_DEC_STREAM_TYPE_MPG || |
| s->type == IVTV_DEC_STREAM_TYPE_YUV || |
| s->type == IVTV_DEC_STREAM_TYPE_VOUT) { |
| /* you cannot read from these stream types. */ |
| return -EPERM; |
| } |
| |
| /* Try to claim this stream. */ |
| if (ivtv_claim_stream(id, s->type)) |
| return -EBUSY; |
| |
| /* This stream does not need to start capturing */ |
| if (s->type == IVTV_DEC_STREAM_TYPE_VBI) { |
| set_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| return 0; |
| } |
| |
| /* If capture is already in progress, then we also have to |
| do nothing extra. */ |
| if (test_bit(IVTV_F_S_STREAMOFF, &s->s_flags) || test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags)) { |
| set_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| return 0; |
| } |
| |
| /* Start VBI capture if required */ |
| s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; |
| if (s->type == IVTV_ENC_STREAM_TYPE_MPG && |
| test_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags) && |
| !test_and_set_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { |
| /* Note: the IVTV_ENC_STREAM_TYPE_VBI is claimed |
| automatically when the MPG stream is claimed. |
| We only need to start the VBI capturing. */ |
| if (ivtv_start_v4l2_encode_stream(s_vbi)) { |
| IVTV_DEBUG_WARN("VBI capture start failed\n"); |
| |
| /* Failure, clean up and return an error */ |
| clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); |
| clear_bit(IVTV_F_S_STREAMING, &s->s_flags); |
| /* also releases the associated VBI stream */ |
| ivtv_release_stream(s); |
| return -EIO; |
| } |
| IVTV_DEBUG_INFO("VBI insertion started\n"); |
| } |
| |
| /* Tell the card to start capturing */ |
| if (!ivtv_start_v4l2_encode_stream(s)) { |
| /* We're done */ |
| set_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| /* Resume a possibly paused encoder */ |
| if (test_and_clear_bit(IVTV_F_I_ENC_PAUSED, &itv->i_flags)) |
| ivtv_vapi(itv, CX2341X_ENC_PAUSE_ENCODER, 1, 1); |
| return 0; |
| } |
| |
| /* failure, clean up */ |
| IVTV_DEBUG_WARN("Failed to start capturing for stream %s\n", s->name); |
| |
| /* Note: the IVTV_ENC_STREAM_TYPE_VBI is released |
| automatically when the MPG stream is released. |
| We only need to stop the VBI capturing. */ |
| if (s->type == IVTV_ENC_STREAM_TYPE_MPG && |
| test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags)) { |
| ivtv_stop_v4l2_encode_stream(s_vbi, 0); |
| clear_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags); |
| } |
| clear_bit(IVTV_F_S_STREAMING, &s->s_flags); |
| ivtv_release_stream(s); |
| return -EIO; |
| } |
| |
| ssize_t ivtv_v4l2_read(struct file * filp, char __user *buf, size_t count, loff_t * pos) |
| { |
| struct ivtv_open_id *id = filp->private_data; |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| int rc; |
| |
| IVTV_DEBUG_HI_FILE("read %zd bytes from %s\n", count, s->name); |
| |
| mutex_lock(&itv->serialize_lock); |
| rc = ivtv_start_capture(id); |
| mutex_unlock(&itv->serialize_lock); |
| if (rc) |
| return rc; |
| return ivtv_read_pos(s, buf, count, pos, filp->f_flags & O_NONBLOCK); |
| } |
| |
| int ivtv_start_decoding(struct ivtv_open_id *id, int speed) |
| { |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| |
| if (atomic_read(&itv->decoding) == 0) { |
| if (ivtv_claim_stream(id, s->type)) { |
| /* someone else is using this stream already */ |
| IVTV_DEBUG_WARN("start decode, stream already claimed\n"); |
| return -EBUSY; |
| } |
| ivtv_start_v4l2_decode_stream(s, 0); |
| } |
| if (s->type == IVTV_DEC_STREAM_TYPE_MPG) |
| return ivtv_set_speed(itv, speed); |
| return 0; |
| } |
| |
| ssize_t ivtv_v4l2_write(struct file *filp, const char __user *user_buf, size_t count, loff_t *pos) |
| { |
| struct ivtv_open_id *id = filp->private_data; |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| struct ivtv_buffer *buf; |
| struct ivtv_queue q; |
| int bytes_written = 0; |
| int mode; |
| int rc; |
| DEFINE_WAIT(wait); |
| |
| IVTV_DEBUG_HI_FILE("write %zd bytes to %s\n", count, s->name); |
| |
| if (s->type != IVTV_DEC_STREAM_TYPE_MPG && |
| s->type != IVTV_DEC_STREAM_TYPE_YUV && |
| s->type != IVTV_DEC_STREAM_TYPE_VOUT) |
| /* not decoder streams */ |
| return -EPERM; |
| |
| /* Try to claim this stream */ |
| if (ivtv_claim_stream(id, s->type)) |
| return -EBUSY; |
| |
| /* This stream does not need to start any decoding */ |
| if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) { |
| set_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| return ivtv_write_vbi(itv, user_buf, count); |
| } |
| |
| mode = s->type == IVTV_DEC_STREAM_TYPE_MPG ? OUT_MPG : OUT_YUV; |
| |
| if (ivtv_set_output_mode(itv, mode) != mode) { |
| ivtv_release_stream(s); |
| return -EBUSY; |
| } |
| ivtv_queue_init(&q); |
| set_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| |
| retry: |
| for (;;) { |
| /* Gather buffers */ |
| while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io))) |
| ivtv_enqueue(s, buf, &q); |
| while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) { |
| ivtv_enqueue(s, buf, &q); |
| } |
| if (q.buffers) |
| break; |
| if (filp->f_flags & O_NONBLOCK) |
| return -EAGAIN; |
| prepare_to_wait(&s->waitq, &wait, TASK_INTERRUPTIBLE); |
| /* New buffers might have become free before we were added to the waitqueue */ |
| if (!s->q_free.buffers) |
| schedule(); |
| finish_wait(&s->waitq, &wait); |
| if (signal_pending(current)) { |
| IVTV_DEBUG_INFO("User stopped %s\n", s->name); |
| return -EINTR; |
| } |
| } |
| |
| /* copy user data into buffers */ |
| while ((buf = ivtv_dequeue(s, &q))) { |
| /* Make sure we really got all the user data */ |
| rc = ivtv_buf_copy_from_user(s, buf, user_buf, count); |
| |
| if (rc < 0) { |
| ivtv_queue_move(s, &q, NULL, &s->q_free, 0); |
| return rc; |
| } |
| user_buf += rc; |
| count -= rc; |
| bytes_written += rc; |
| |
| if (buf->bytesused != s->buf_size) { |
| /* incomplete, leave in q_io for next time */ |
| ivtv_enqueue(s, buf, &s->q_io); |
| break; |
| } |
| /* Byteswap MPEG buffer */ |
| if (s->type == IVTV_DEC_STREAM_TYPE_MPG) |
| ivtv_buf_swap(buf); |
| ivtv_enqueue(s, buf, &s->q_full); |
| } |
| |
| /* Start decoder (returns 0 if already started) */ |
| mutex_lock(&itv->serialize_lock); |
| rc = ivtv_start_decoding(id, itv->speed); |
| mutex_unlock(&itv->serialize_lock); |
| if (rc) { |
| IVTV_DEBUG_WARN("Failed start decode stream %s\n", s->name); |
| |
| /* failure, clean up */ |
| clear_bit(IVTV_F_S_STREAMING, &s->s_flags); |
| clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| return rc; |
| } |
| if (test_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags)) { |
| if (s->q_full.length >= itv->dma_data_req_size) { |
| int got_sig; |
| |
| prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE); |
| while (!(got_sig = signal_pending(current)) && |
| test_bit(IVTV_F_S_DMA_PENDING, &s->s_flags)) { |
| schedule(); |
| } |
| finish_wait(&itv->dma_waitq, &wait); |
| if (got_sig) { |
| IVTV_DEBUG_INFO("User interrupted %s\n", s->name); |
| return -EINTR; |
| } |
| |
| clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags); |
| ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size); |
| ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 1); |
| } |
| } |
| /* more user data is available, wait until buffers become free |
| to transfer the rest. */ |
| if (count && !(filp->f_flags & O_NONBLOCK)) |
| goto retry; |
| IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); |
| return bytes_written; |
| } |
| |
| unsigned int ivtv_v4l2_dec_poll(struct file *filp, poll_table *wait) |
| { |
| struct ivtv_open_id *id = filp->private_data; |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| int res = 0; |
| |
| /* add stream's waitq to the poll list */ |
| IVTV_DEBUG_HI_FILE("Decoder poll\n"); |
| poll_wait(filp, &s->waitq, wait); |
| |
| set_bit(IVTV_F_I_EV_VSYNC_ENABLED, &itv->i_flags); |
| if (test_bit(IVTV_F_I_EV_VSYNC, &itv->i_flags) || |
| test_bit(IVTV_F_I_EV_DEC_STOPPED, &itv->i_flags)) |
| res = POLLPRI; |
| |
| /* Allow write if buffers are available for writing */ |
| if (s->q_free.buffers) |
| res |= POLLOUT | POLLWRNORM; |
| return res; |
| } |
| |
| unsigned int ivtv_v4l2_enc_poll(struct file *filp, poll_table * wait) |
| { |
| struct ivtv_open_id *id = filp->private_data; |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| int eof = test_bit(IVTV_F_S_STREAMOFF, &s->s_flags); |
| |
| /* Start a capture if there is none */ |
| if (!eof && !test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { |
| int rc; |
| |
| mutex_lock(&itv->serialize_lock); |
| rc = ivtv_start_capture(id); |
| mutex_unlock(&itv->serialize_lock); |
| if (rc) { |
| IVTV_DEBUG_INFO("Could not start capture for %s (%d)\n", |
| s->name, rc); |
| return POLLERR; |
| } |
| IVTV_DEBUG_FILE("Encoder poll started capture\n"); |
| } |
| |
| /* add stream's waitq to the poll list */ |
| IVTV_DEBUG_HI_FILE("Encoder poll\n"); |
| poll_wait(filp, &s->waitq, wait); |
| |
| if (eof || s->q_full.length) |
| return POLLIN | POLLRDNORM; |
| return 0; |
| } |
| |
| void ivtv_stop_capture(struct ivtv_open_id *id, int gop_end) |
| { |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| |
| IVTV_DEBUG_FILE("close() of %s\n", s->name); |
| |
| /* 'Unclaim' this stream */ |
| |
| /* Stop capturing */ |
| if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { |
| struct ivtv_stream *s_vbi = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI]; |
| |
| IVTV_DEBUG_INFO("close stopping capture\n"); |
| /* Special case: a running VBI capture for VBI insertion |
| in the mpeg stream. Need to stop that too. */ |
| if (id->type == IVTV_ENC_STREAM_TYPE_MPG && |
| test_bit(IVTV_F_S_STREAMING, &s_vbi->s_flags) && |
| !test_bit(IVTV_F_S_APPL_IO, &s_vbi->s_flags)) { |
| IVTV_DEBUG_INFO("close stopping embedded VBI capture\n"); |
| ivtv_stop_v4l2_encode_stream(s_vbi, 0); |
| } |
| if ((id->type == IVTV_DEC_STREAM_TYPE_VBI || |
| id->type == IVTV_ENC_STREAM_TYPE_VBI) && |
| test_bit(IVTV_F_S_INTERNAL_USE, &s->s_flags)) { |
| /* Also used internally, don't stop capturing */ |
| s->id = -1; |
| } |
| else { |
| ivtv_stop_v4l2_encode_stream(s, gop_end); |
| } |
| } |
| if (!gop_end) { |
| clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); |
| ivtv_release_stream(s); |
| } |
| } |
| |
| static void ivtv_stop_decoding(struct ivtv_open_id *id, int flags, u64 pts) |
| { |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| |
| IVTV_DEBUG_FILE("close() of %s\n", s->name); |
| |
| /* Stop decoding */ |
| if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) { |
| IVTV_DEBUG_INFO("close stopping decode\n"); |
| |
| ivtv_stop_v4l2_decode_stream(s, flags, pts); |
| itv->output_mode = OUT_NONE; |
| } |
| clear_bit(IVTV_F_S_APPL_IO, &s->s_flags); |
| clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags); |
| if (id->type == IVTV_DEC_STREAM_TYPE_YUV && test_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags)) { |
| /* Restore registers we've changed & clean up any mess we've made */ |
| ivtv_yuv_close(itv); |
| } |
| if (itv->output_mode == OUT_UDMA_YUV && id->yuv_frames) |
| itv->output_mode = OUT_NONE; |
| |
| itv->speed = 0; |
| clear_bit(IVTV_F_I_DEC_PAUSED, &itv->i_flags); |
| ivtv_release_stream(s); |
| } |
| |
| int ivtv_v4l2_close(struct inode *inode, struct file *filp) |
| { |
| struct ivtv_open_id *id = filp->private_data; |
| struct ivtv *itv = id->itv; |
| struct ivtv_stream *s = &itv->streams[id->type]; |
| |
| IVTV_DEBUG_FILE("close %s\n", s->name); |
| |
| v4l2_prio_close(&itv->prio, &id->prio); |
| |
| /* Easy case first: this stream was never claimed by us */ |
| if (s->id != id->open_id) { |
| kfree(id); |
| return 0; |
| } |
| |
| /* 'Unclaim' this stream */ |
| |
| /* Stop radio */ |
| mutex_lock(&itv->serialize_lock); |
| if (id->type == IVTV_ENC_STREAM_TYPE_RAD) { |
| /* Closing radio device, return to TV mode */ |
| ivtv_mute(itv); |
| /* Mark that the radio is no longer in use */ |
| clear_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); |
| /* Switch tuner to TV */ |
| ivtv_call_i2c_clients(itv, VIDIOC_S_STD, &itv->std); |
| /* Select correct audio input (i.e. TV tuner or Line in) */ |
| ivtv_audio_set_io(itv); |
| if (itv->hw_flags & IVTV_HW_SAA711X) |
| { |
| struct v4l2_crystal_freq crystal_freq; |
| crystal_freq.freq = SAA7115_FREQ_32_11_MHZ; |
| crystal_freq.flags = 0; |
| ivtv_saa7115(itv, VIDIOC_INT_S_CRYSTAL_FREQ, &crystal_freq); |
| } |
| /* Done! Unmute and continue. */ |
| ivtv_unmute(itv); |
| ivtv_release_stream(s); |
| } else if (s->type >= IVTV_DEC_STREAM_TYPE_MPG) { |
| struct ivtv_stream *s_vout = &itv->streams[IVTV_DEC_STREAM_TYPE_VOUT]; |
| |
| ivtv_stop_decoding(id, VIDEO_CMD_STOP_TO_BLACK | VIDEO_CMD_STOP_IMMEDIATELY, 0); |
| |
| /* If all output streams are closed, and if the user doesn't have |
| IVTV_DEC_STREAM_TYPE_VOUT open, then disable VBI on TV-out. */ |
| if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) { |
| /* disable VBI on TV-out */ |
| ivtv_disable_vbi(itv); |
| } |
| } else { |
| ivtv_stop_capture(id, 0); |
| } |
| kfree(id); |
| mutex_unlock(&itv->serialize_lock); |
| return 0; |
| } |
| |
| static int ivtv_serialized_open(struct ivtv_stream *s, struct file *filp) |
| { |
| struct ivtv *itv = s->itv; |
| struct ivtv_open_id *item; |
| |
| IVTV_DEBUG_FILE("open %s\n", s->name); |
| |
| if (s->type == IVTV_DEC_STREAM_TYPE_MPG && |
| test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_YUV].s_flags)) |
| return -EBUSY; |
| |
| if (s->type == IVTV_DEC_STREAM_TYPE_YUV && |
| test_bit(IVTV_F_S_CLAIMED, &itv->streams[IVTV_DEC_STREAM_TYPE_MPG].s_flags)) |
| return -EBUSY; |
| |
| if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { |
| if (read_reg(0x82c) == 0) { |
| IVTV_ERR("Tried to open YUV output device but need to send data to mpeg decoder before it can be used\n"); |
| /* return -ENODEV; */ |
| } |
| ivtv_udma_alloc(itv); |
| } |
| |
| /* Allocate memory */ |
| item = kmalloc(sizeof(struct ivtv_open_id), GFP_KERNEL); |
| if (NULL == item) { |
| IVTV_DEBUG_WARN("nomem on v4l2 open\n"); |
| return -ENOMEM; |
| } |
| item->itv = itv; |
| item->type = s->type; |
| v4l2_prio_open(&itv->prio, &item->prio); |
| |
| item->open_id = itv->open_id++; |
| filp->private_data = item; |
| |
| if (item->type == IVTV_ENC_STREAM_TYPE_RAD) { |
| /* Try to claim this stream */ |
| if (ivtv_claim_stream(item, item->type)) { |
| /* No, it's already in use */ |
| kfree(item); |
| return -EBUSY; |
| } |
| |
| if (!test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) { |
| if (atomic_read(&itv->capturing) > 0) { |
| /* switching to radio while capture is |
| in progress is not polite */ |
| kfree(item); |
| return -EBUSY; |
| } |
| } |
| /* Mark that the radio is being used. */ |
| set_bit(IVTV_F_I_RADIO_USER, &itv->i_flags); |
| /* We have the radio */ |
| ivtv_mute(itv); |
| /* Switch tuner to radio */ |
| ivtv_call_i2c_clients(itv, AUDC_SET_RADIO, NULL); |
| /* Select the correct audio input (i.e. radio tuner) */ |
| ivtv_audio_set_io(itv); |
| if (itv->hw_flags & IVTV_HW_SAA711X) |
| { |
| struct v4l2_crystal_freq crystal_freq; |
| crystal_freq.freq = SAA7115_FREQ_32_11_MHZ; |
| crystal_freq.flags = SAA7115_FREQ_FL_APLL; |
| ivtv_saa7115(itv, VIDIOC_INT_S_CRYSTAL_FREQ, &crystal_freq); |
| } |
| /* Done! Unmute and continue. */ |
| ivtv_unmute(itv); |
| } |
| |
| /* YUV or MPG Decoding Mode? */ |
| if (s->type == IVTV_DEC_STREAM_TYPE_MPG) |
| clear_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); |
| else if (s->type == IVTV_DEC_STREAM_TYPE_YUV) |
| set_bit(IVTV_F_I_DEC_YUV, &itv->i_flags); |
| return 0; |
| } |
| |
| int ivtv_v4l2_open(struct inode *inode, struct file *filp) |
| { |
| int res, x, y = 0; |
| struct ivtv *itv = NULL; |
| struct ivtv_stream *s = NULL; |
| int minor = iminor(inode); |
| |
| /* Find which card this open was on */ |
| spin_lock(&ivtv_cards_lock); |
| for (x = 0; itv == NULL && x < ivtv_cards_active; x++) { |
| /* find out which stream this open was on */ |
| for (y = 0; y < IVTV_MAX_STREAMS; y++) { |
| s = &ivtv_cards[x]->streams[y]; |
| if (s->v4l2dev && s->v4l2dev->minor == minor) { |
| itv = ivtv_cards[x]; |
| break; |
| } |
| } |
| } |
| spin_unlock(&ivtv_cards_lock); |
| |
| if (itv == NULL) { |
| /* Couldn't find a device registered |
| on that minor, shouldn't happen! */ |
| IVTV_WARN("No ivtv device found on minor %d\n", minor); |
| return -ENXIO; |
| } |
| |
| mutex_lock(&itv->serialize_lock); |
| if (ivtv_init_on_first_open(itv)) { |
| IVTV_ERR("Failed to initialize on minor %d\n", minor); |
| mutex_unlock(&itv->serialize_lock); |
| return -ENXIO; |
| } |
| res = ivtv_serialized_open(s, filp); |
| mutex_unlock(&itv->serialize_lock); |
| return res; |
| } |
| |
| void ivtv_mute(struct ivtv *itv) |
| { |
| if (atomic_read(&itv->capturing)) |
| ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 1); |
| IVTV_DEBUG_INFO("Mute\n"); |
| } |
| |
| void ivtv_unmute(struct ivtv *itv) |
| { |
| if (atomic_read(&itv->capturing)) { |
| ivtv_msleep_timeout(100, 0); |
| ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12); |
| ivtv_vapi(itv, CX2341X_ENC_MUTE_AUDIO, 1, 0); |
| } |
| IVTV_DEBUG_INFO("Unmute\n"); |
| } |