/* 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 (time_after(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 yuv_playback_info *yi = &itv->yuv_info; 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) { int elems = count / sizeof(struct v4l2_sliced_vbi_data); set_bit(IVTV_F_S_APPL_IO, &s->s_flags); ivtv_write_vbi(itv, (const struct v4l2_sliced_vbi_data *)user_buf, elems); return elems * sizeof(struct v4l2_sliced_vbi_data); } 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: /* If possible, just DMA the entire frame - Check the data transfer size since we may get here before the stream has been fully set-up */ if (mode == OUT_YUV && s->q_full.length == 0 && itv->dma_data_req_size) { while (count >= itv->dma_data_req_size) { if (!ivtv_yuv_udma_stream_frame (itv, (void *)user_buf)) { bytes_written += itv->dma_data_req_size; user_buf += itv->dma_data_req_size; count -= itv->dma_data_req_size; } else { break; } } if (count == 0) { IVTV_DEBUG_HI_FILE("Wrote %d bytes to %s (%d)\n", bytes_written, s->name, s->q_full.bytesused); return bytes_written; } } 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))) { /* yuv is a pain. Don't copy more data than needed for a single frame, otherwise we lose sync with the incoming stream */ if (s->type == IVTV_DEC_STREAM_TYPE_YUV && yi->stream_size + count > itv->dma_data_req_size) rc = ivtv_buf_copy_from_user(s, buf, user_buf, itv->dma_data_req_size - yi->stream_size); else rc = ivtv_buf_copy_from_user(s, buf, user_buf, count); /* Make sure we really got all the user data */ if (rc < 0) { ivtv_queue_move(s, &q, NULL, &s->q_free, 0); return rc; } user_buf += rc; count -= rc; bytes_written += rc; if (s->type == IVTV_DEC_STREAM_TYPE_YUV) { yi->stream_size += rc; /* If we have a complete yuv frame, break loop now */ if (yi->stream_size == itv->dma_data_req_size) { ivtv_enqueue(s, buf, &s->q_full); yi->stream_size = 0; break; } } 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; if (mode == OUT_YUV) ivtv_yuv_setup_stream_frame(itv); 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 (s->q_full.length || s->q_io.length) return POLLIN | POLLRDNORM; if (eof) return POLLHUP; 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); } if (atomic_read(&itv->capturing) > 0) { /* Undo video mute */ ivtv_vapi(itv, CX2341X_ENC_MUTE_VIDEO, 1, itv->params.video_mute | (itv->params.video_mute_yuv << 8)); } /* 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 CC on TV-out. */ if (itv->output_mode == OUT_NONE && !test_bit(IVTV_F_S_APPL_IO, &s_vout->s_flags)) { /* disable CC on TV-out */ ivtv_disable_cc(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 */ ivtv_release_stream(s); 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); /* For yuv, we need to know the dma size before we start */ itv->dma_data_req_size = 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31); itv->yuv_info.stream_size = 0; } 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++) { if (ivtv_cards[x] == NULL) continue; /* 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! */ printk(KERN_WARNING "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"); }