diff options
Diffstat (limited to 'drivers/media/video/uvc/uvc_video.c')
| -rw-r--r-- | drivers/media/video/uvc/uvc_video.c | 625 |
1 files changed, 588 insertions, 37 deletions
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index b015e8e5e8b..c7e69b8f81c 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -351,25 +351,553 @@ done: return ret; } -int uvc_commit_video(struct uvc_streaming *stream, - struct uvc_streaming_control *probe) +static int uvc_commit_video(struct uvc_streaming *stream, + struct uvc_streaming_control *probe) { return uvc_set_video_ctrl(stream, probe, 0); } +/* ----------------------------------------------------------------------------- + * Clocks and timestamps + */ + +static void +uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf, + const __u8 *data, int len) +{ + struct uvc_clock_sample *sample; + unsigned int header_size; + bool has_pts = false; + bool has_scr = false; + unsigned long flags; + struct timespec ts; + u16 host_sof; + u16 dev_sof; + + switch (data[1] & (UVC_STREAM_PTS | UVC_STREAM_SCR)) { + case UVC_STREAM_PTS | UVC_STREAM_SCR: + header_size = 12; + has_pts = true; + has_scr = true; + break; + case UVC_STREAM_PTS: + header_size = 6; + has_pts = true; + break; + case UVC_STREAM_SCR: + header_size = 8; + has_scr = true; + break; + default: + header_size = 2; + break; + } + + /* Check for invalid headers. */ + if (len < header_size) + return; + + /* Extract the timestamps: + * + * - store the frame PTS in the buffer structure + * - if the SCR field is present, retrieve the host SOF counter and + * kernel timestamps and store them with the SCR STC and SOF fields + * in the ring buffer + */ + if (has_pts && buf != NULL) + buf->pts = get_unaligned_le32(&data[2]); + + if (!has_scr) + return; + + /* To limit the amount of data, drop SCRs with an SOF identical to the + * previous one. + */ + dev_sof = get_unaligned_le16(&data[header_size - 2]); + if (dev_sof == stream->clock.last_sof) + return; + + stream->clock.last_sof = dev_sof; + + host_sof = usb_get_current_frame_number(stream->dev->udev); + ktime_get_ts(&ts); + + /* The UVC specification allows device implementations that can't obtain + * the USB frame number to keep their own frame counters as long as they + * match the size and frequency of the frame number associated with USB + * SOF tokens. The SOF values sent by such devices differ from the USB + * SOF tokens by a fixed offset that needs to be estimated and accounted + * for to make timestamp recovery as accurate as possible. + * + * The offset is estimated the first time a device SOF value is received + * as the difference between the host and device SOF values. As the two + * SOF values can differ slightly due to transmission delays, consider + * that the offset is null if the difference is not higher than 10 ms + * (negative differences can not happen and are thus considered as an + * offset). The video commit control wDelay field should be used to + * compute a dynamic threshold instead of using a fixed 10 ms value, but + * devices don't report reliable wDelay values. + * + * See uvc_video_clock_host_sof() for an explanation regarding why only + * the 8 LSBs of the delta are kept. + */ + if (stream->clock.sof_offset == (u16)-1) { + u16 delta_sof = (host_sof - dev_sof) & 255; + if (delta_sof >= 10) + stream->clock.sof_offset = delta_sof; + else + stream->clock.sof_offset = 0; + } + + dev_sof = (dev_sof + stream->clock.sof_offset) & 2047; + + spin_lock_irqsave(&stream->clock.lock, flags); + + sample = &stream->clock.samples[stream->clock.head]; + sample->dev_stc = get_unaligned_le32(&data[header_size - 6]); + sample->dev_sof = dev_sof; + sample->host_sof = host_sof; + sample->host_ts = ts; + + /* Update the sliding window head and count. */ + stream->clock.head = (stream->clock.head + 1) % stream->clock.size; + + if (stream->clock.count < stream->clock.size) + stream->clock.count++; + + spin_unlock_irqrestore(&stream->clock.lock, flags); +} + +static int uvc_video_clock_init(struct uvc_streaming *stream) +{ + struct uvc_clock *clock = &stream->clock; + + spin_lock_init(&clock->lock); + clock->head = 0; + clock->count = 0; + clock->size = 32; + clock->last_sof = -1; + clock->sof_offset = -1; + + clock->samples = kmalloc(clock->size * sizeof(*clock->samples), + GFP_KERNEL); + if (clock->samples == NULL) + return -ENOMEM; + + return 0; +} + +static void uvc_video_clock_cleanup(struct uvc_streaming *stream) +{ + kfree(stream->clock.samples); + stream->clock.samples = NULL; +} + +/* + * uvc_video_clock_host_sof - Return the host SOF value for a clock sample + * + * Host SOF counters reported by usb_get_current_frame_number() usually don't + * cover the whole 11-bits SOF range (0-2047) but are limited to the HCI frame + * schedule window. They can be limited to 8, 9 or 10 bits depending on the host + * controller and its configuration. + * + * We thus need to recover the SOF value corresponding to the host frame number. + * As the device and host frame numbers are sampled in a short interval, the + * difference between their values should be equal to a small delta plus an + * integer multiple of 256 caused by the host frame number limited precision. + * + * To obtain the recovered host SOF value, compute the small delta by masking + * the high bits of the host frame counter and device SOF difference and add it + * to the device SOF value. + */ +static u16 uvc_video_clock_host_sof(const struct uvc_clock_sample *sample) +{ + /* The delta value can be negative. */ + s8 delta_sof; + + delta_sof = (sample->host_sof - sample->dev_sof) & 255; + + return (sample->dev_sof + delta_sof) & 2047; +} + +/* + * uvc_video_clock_update - Update the buffer timestamp + * + * This function converts the buffer PTS timestamp to the host clock domain by + * going through the USB SOF clock domain and stores the result in the V4L2 + * buffer timestamp field. + * + * The relationship between the device clock and the host clock isn't known. + * However, the device and the host share the common USB SOF clock which can be + * used to recover that relationship. + * + * The relationship between the device clock and the USB SOF clock is considered + * to be linear over the clock samples sliding window and is given by + * + * SOF = m * PTS + p + * + * Several methods to compute the slope (m) and intercept (p) can be used. As + * the clock drift should be small compared to the sliding window size, we + * assume that the line that goes through the points at both ends of the window + * is a good approximation. Naming those points P1 and P2, we get + * + * SOF = (SOF2 - SOF1) / (STC2 - STC1) * PTS + * + (SOF1 * STC2 - SOF2 * STC1) / (STC2 - STC1) + * + * or + * + * SOF = ((SOF2 - SOF1) * PTS + SOF1 * STC2 - SOF2 * STC1) / (STC2 - STC1) (1) + * + * to avoid loosing precision in the division. Similarly, the host timestamp is + * computed with + * + * TS = ((TS2 - TS1) * PTS + TS1 * SOF2 - TS2 * SOF1) / (SOF2 - SOF1) (2) + * + * SOF values are coded on 11 bits by USB. We extend their precision with 16 + * decimal bits, leading to a 11.16 coding. + * + * TODO: To avoid surprises with device clock values, PTS/STC timestamps should + * be normalized using the nominal device clock frequency reported through the + * UVC descriptors. + * + * Both the PTS/STC and SOF counters roll over, after a fixed but device + * specific amount of time for PTS/STC and after 2048ms for SOF. As long as the + * sliding window size is smaller than the rollover period, differences computed + * on unsigned integers will produce the correct result. However, the p term in + * the linear relations will be miscomputed. + * + * To fix the issue, we subtract a constant from the PTS and STC values to bring + * PTS to half the 32 bit STC range. The sliding window STC values then fit into + * the 32 bit range without any rollover. + * + * Similarly, we add 2048 to the device SOF values to make sure that the SOF + * computed by (1) will never be smaller than 0. This offset is then compensated + * by adding 2048 to the SOF values used in (2). However, this doesn't prevent + * rollovers between (1) and (2): the SOF value computed by (1) can be slightly + * lower than 4096, and the host SOF counters can have rolled over to 2048. This + * case is handled by subtracting 2048 from the SOF value if it exceeds the host + * SOF value at the end of the sliding window. + * + * Finally we subtract a constant from the host timestamps to bring the first + * timestamp of the sliding window to 1s. + */ +void uvc_video_clock_update(struct uvc_streaming *stream, + struct v4l2_buffer *v4l2_buf, + struct uvc_buffer *buf) +{ + struct uvc_clock *clock = &stream->clock; + struct uvc_clock_sample *first; + struct uvc_clock_sample *last; + unsigned long flags; + struct timespec ts; + u32 delta_stc; + u32 y1, y2; + u32 x1, x2; + u32 mean; + u32 sof; + u32 div; + u32 rem; + u64 y; + + spin_lock_irqsave(&clock->lock, flags); + + if (clock->count < clock->size) + goto done; + + first = &clock->samples[clock->head]; + last = &clock->samples[(clock->head - 1) % clock->size]; + + /* First step, PTS to SOF conversion. */ + delta_stc = buf->pts - (1UL << 31); + x1 = first->dev_stc - delta_stc; + x2 = last->dev_stc - delta_stc; + y1 = (first->dev_sof + 2048) << 16; + y2 = (last->dev_sof + 2048) << 16; + + if (y2 < y1) + y2 += 2048 << 16; + + y = (u64)(y2 - y1) * (1ULL << 31) + (u64)y1 * (u64)x2 + - (u64)y2 * (u64)x1; + y = div_u64(y, x2 - x1); + + sof = y; + + uvc_trace(UVC_TRACE_CLOCK, "%s: PTS %u y %llu.%06llu SOF %u.%06llu " + "(x1 %u x2 %u y1 %u y2 %u SOF offset %u)\n", + stream->dev->name, buf->pts, + y >> 16, div_u64((y & 0xffff) * 1000000, 65536), + sof >> 16, div_u64(((u64)sof & 0xffff) * 1000000LLU, 65536), + x1, x2, y1, y2, clock->sof_offset); + + /* Second step, SOF to host clock conversion. */ + ts = timespec_sub(last->host_ts, first->host_ts); + x1 = (uvc_video_clock_host_sof(first) + 2048) << 16; + x2 = (uvc_video_clock_host_sof(last) + 2048) << 16; + y1 = NSEC_PER_SEC; + y2 = (ts.tv_sec + 1) * NSEC_PER_SEC + ts.tv_nsec; + + if (x2 < x1) + x2 += 2048 << 16; + + /* Interpolated and host SOF timestamps can wrap around at slightly + * different times. Handle this by adding or removing 2048 to or from + * the computed SOF value to keep it close to the SOF samples mean + * value. + */ + mean = (x1 + x2) / 2; + if (mean - (1024 << 16) > sof) + sof += 2048 << 16; + else if (sof > mean + (1024 << 16)) + sof -= 2048 << 16; + + y = (u64)(y2 - y1) * (u64)sof + (u64)y1 * (u64)x2 + - (u64)y2 * (u64)x1; + y = div_u64(y, x2 - x1); + + div = div_u64_rem(y, NSEC_PER_SEC, &rem); + ts.tv_sec = first->host_ts.tv_sec - 1 + div; + ts.tv_nsec = first->host_ts.tv_nsec + rem; + if (ts.tv_nsec >= NSEC_PER_SEC) { + ts.tv_sec++; + ts.tv_nsec -= NSEC_PER_SEC; + } + + uvc_trace(UVC_TRACE_CLOCK, "%s: SOF %u.%06llu y %llu ts %lu.%06lu " + "buf ts %lu.%06lu (x1 %u/%u/%u x2 %u/%u/%u y1 %u y2 %u)\n", + stream->dev->name, + sof >> 16, div_u64(((u64)sof & 0xffff) * 1000000LLU, 65536), + y, ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC, + v4l2_buf->timestamp.tv_sec, v4l2_buf->timestamp.tv_usec, + x1, first->host_sof, first->dev_sof, + x2, last->host_sof, last->dev_sof, y1, y2); + + /* Update the V4L2 buffer. */ + v4l2_buf->timestamp.tv_sec = ts.tv_sec; + v4l2_buf->timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; + +done: + spin_unlock_irqrestore(&stream->clock.lock, flags); +} + /* ------------------------------------------------------------------------ - * Video codecs + * Stream statistics */ -/* Values for bmHeaderInfo (Video and Still Image Payload Headers, 2.4.3.3) */ -#define UVC_STREAM_EOH (1 << 7) -#define UVC_STREAM_ERR (1 << 6) -#define UVC_STREAM_STI (1 << 5) -#define UVC_STREAM_RES (1 << 4) -#define UVC_STREAM_SCR (1 << 3) -#define UVC_STREAM_PTS (1 << 2) -#define UVC_STREAM_EOF (1 << 1) -#define UVC_STREAM_FID (1 << 0) +static void uvc_video_stats_decode(struct uvc_streaming *stream, + const __u8 *data, int len) +{ + unsigned int header_size; + bool has_pts = false; + bool has_scr = false; + u16 uninitialized_var(scr_sof); + u32 uninitialized_var(scr_stc); + u32 uninitialized_var(pts); + + if (stream->stats.stream.nb_frames == 0 && + stream->stats.frame.nb_packets == 0) + ktime_get_ts(&stream->stats.stream.start_ts); + + switch (data[1] & (UVC_STREAM_PTS | UVC_STREAM_SCR)) { + case UVC_STREAM_PTS | UVC_STREAM_SCR: + header_size = 12; + has_pts = true; + has_scr = true; + break; + case UVC_STREAM_PTS: + header_size = 6; + has_pts = true; + break; + case UVC_STREAM_SCR: + header_size = 8; + has_scr = true; + break; + default: + header_size = 2; + break; + } + + /* Check for invalid headers. */ + if (len < header_size || data[0] < header_size) { + stream->stats.frame.nb_invalid++; + return; + } + + /* Extract the timestamps. */ + if (has_pts) + pts = get_unaligned_le32(&data[2]); + + if (has_scr) { + scr_stc = get_unaligned_le32(&data[header_size - 6]); + scr_sof = get_unaligned_le16(&data[header_size - 2]); + } + + /* Is PTS constant through the whole frame ? */ + if (has_pts && stream->stats.frame.nb_pts) { + if (stream->stats.frame.pts != pts) { + stream->stats.frame.nb_pts_diffs++; + stream->stats.frame.last_pts_diff = + stream->stats.frame.nb_packets; + } + } + + if (has_pts) { + stream->stats.frame.nb_pts++; + stream->stats.frame.pts = pts; + } + + /* Do all frames have a PTS in their first non-empty packet, or before + * their first empty packet ? + */ + if (stream->stats.frame.size == 0) { + if (len > header_size) + stream->stats.frame.has_initial_pts = has_pts; + if (len == header_size && has_pts) + stream->stats.frame.has_early_pts = true; + } + + /* Do the SCR.STC and SCR.SOF fields vary through the frame ? */ + if (has_scr && stream->stats.frame.nb_scr) { + if (stream->stats.frame.scr_stc != scr_stc) + stream->stats.frame.nb_scr_diffs++; + } + + if (has_scr) { + /* Expand the SOF counter to 32 bits and store its value. */ + if (stream->stats.stream.nb_frames > 0 || + stream->stats.frame.nb_scr > 0) + stream->stats.stream.scr_sof_count += + (scr_sof - stream->stats.stream.scr_sof) % 2048; + stream->stats.stream.scr_sof = scr_sof; + + stream->stats.frame.nb_scr++; + stream->stats.frame.scr_stc = scr_stc; + stream->stats.frame.scr_sof = scr_sof; + + if (scr_sof < stream->stats.stream.min_sof) + stream->stats.stream.min_sof = scr_sof; + if (scr_sof > stream->stats.stream.max_sof) + stream->stats.stream.max_sof = scr_sof; + } + + /* Record the first non-empty packet number. */ + if (stream->stats.frame.size == 0 && len > header_size) + stream->stats.frame.first_data = stream->stats.frame.nb_packets; + + /* Update the frame size. */ + stream->stats.frame.size += len - header_size; + + /* Update the packets counters. */ + stream->stats.frame.nb_packets++; + if (len > header_size) + stream->stats.frame.nb_empty++; + + if (data[1] & UVC_STREAM_ERR) + stream->stats.frame.nb_errors++; +} + +static void uvc_video_stats_update(struct uvc_streaming *stream) +{ + struct uvc_stats_frame *frame = &stream->stats.frame; + + uvc_trace(UVC_TRACE_STATS, "frame %u stats: %u/%u/%u packets, " + "%u/%u/%u pts (%searly %sinitial), %u/%u scr, " + "last pts/stc/sof %u/%u/%u\n", + stream->sequence, frame->first_data, + frame->nb_packets - frame->nb_empty, frame->nb_packets, + frame->nb_pts_diffs, frame->last_pts_diff, frame->nb_pts, + frame->has_early_pts ? "" : "!", + frame->has_initial_pts ? "" : "!", + frame->nb_scr_diffs, frame->nb_scr, + frame->pts, frame->scr_stc, frame->scr_sof); + + stream->stats.stream.nb_frames++; + stream->stats.stream.nb_packets += stream->stats.frame.nb_packets; + stream->stats.stream.nb_empty += stream->stats.frame.nb_empty; + stream->stats.stream.nb_errors += stream->stats.frame.nb_errors; + stream->stats.stream.nb_invalid += stream->stats.frame.nb_invalid; + + if (frame->has_early_pts) + stream->stats.stream.nb_pts_early++; + if (frame->has_initial_pts) + stream->stats.stream.nb_pts_initial++; + if (frame->last_pts_diff <= frame->first_data) + stream->stats.stream.nb_pts_constant++; + if (frame->nb_scr >= frame->nb_packets - frame->nb_empty) + stream->stats.stream.nb_scr_count_ok++; + if (frame->nb_scr_diffs + 1 == frame->nb_scr) + stream->stats.stream.nb_scr_diffs_ok++; + + memset(&stream->stats.frame, 0, sizeof(stream->stats.frame)); +} + +size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf, + size_t size) +{ + unsigned int scr_sof_freq; + unsigned int duration; + struct timespec ts; + size_t count = 0; + + ts.tv_sec = stream->stats.stream.stop_ts.tv_sec + - stream->stats.stream.start_ts.tv_sec; + ts.tv_nsec = stream->stats.stream.stop_ts.tv_nsec + - stream->stats.stream.start_ts.tv_nsec; + if (ts.tv_nsec < 0) { + ts.tv_sec--; + ts.tv_nsec += 1000000000; + } + + /* Compute the SCR.SOF frequency estimate. At the nominal 1kHz SOF + * frequency this will not overflow before more than 1h. + */ + duration = ts.tv_sec * 1000 + ts.tv_nsec / 1000000; + if (duration != 0) + scr_sof_freq = stream->stats.stream.scr_sof_count * 1000 + / duration; + else + scr_sof_freq = 0; + + count += scnprintf(buf + count, size - count, + "frames: %u\npackets: %u\nempty: %u\n" + "errors: %u\ninvalid: %u\n", + stream->stats.stream.nb_frames, + stream->stats.stream.nb_packets, + stream->stats.stream.nb_empty, + stream->stats.stream.nb_errors, + stream->stats.stream.nb_invalid); + count += scnprintf(buf + count, size - count, + "pts: %u early, %u initial, %u ok\n", + stream->stats.stream.nb_pts_early, + stream->stats.stream.nb_pts_initial, + stream->stats.stream.nb_pts_constant); + count += scnprintf(buf + count, size - count, + "scr: %u count ok, %u diff ok\n", + stream->stats.stream.nb_scr_count_ok, + stream->stats.stream.nb_scr_diffs_ok); + count += scnprintf(buf + count, size - count, + "sof: %u <= sof <= %u, freq %u.%03u kHz\n", + stream->stats.stream.min_sof, + stream->stats.stream.max_sof, + scr_sof_freq / 1000, scr_sof_freq % 1000); + + return count; +} + +static void uvc_video_stats_start(struct uvc_streaming *stream) +{ + memset(&stream->stats, 0, sizeof(stream->stats)); + stream->stats.stream.min_sof = 2048; +} + +static void uvc_video_stats_stop(struct uvc_streaming *stream) +{ + ktime_get_ts(&stream->stats.stream.stop_ts); +} + +/* ------------------------------------------------------------------------ + * Video codecs + */ /* Video payload decoding is handled by uvc_video_decode_start(), * uvc_video_decode_data() and uvc_video_decode_end(). @@ -416,14 +944,9 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, * - bHeaderLength value must be at least 2 bytes (see above) * - bHeaderLength value can't be larger than the packet size. */ - if (len < 2 || data[0] < 2 || data[0] > len) + if (len < 2 || data[0] < 2 || data[0] > len) { + stream->stats.frame.nb_invalid++; return -EINVAL; - - /* Skip payloads marked with the error bit ("error frames"). */ - if (data[1] & UVC_STREAM_ERR) { - uvc_trace(UVC_TRACE_FRAME, "Dropping payload (error bit " - "set).\n"); - return -ENODATA; } fid = data[1] & UVC_STREAM_FID; @@ -431,8 +954,14 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, /* Increase the sequence number regardless of any buffer states, so * that discontinuous sequence numbers always indicate lost frames. */ - if (stream->last_fid != fid) + if (stream->last_fid != fid) { stream->sequence++; + if (stream->sequence) + uvc_video_stats_update(stream); + } + + uvc_video_clock_decode(stream, buf, data, len); + uvc_video_stats_decode(stream, data, len); /* Store the payload FID bit and return immediately when the buffer is * NULL. @@ -442,6 +971,13 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, return -ENODATA; } + /* Mark the buffer as bad if the error bit is set. */ + if (data[1] & UVC_STREAM_ERR) { + uvc_trace(UVC_TRACE_FRAME, "Marking buffer as bad (error bit " + "set).\n"); + buf->error = 1; + } + /* Synchronize to the input stream by waiting for the FID bit to be * toggled when the the buffer state is not UVC_BUF_STATE_ACTIVE. * stream->last_fid is initialized to -1, so the first isochronous @@ -467,9 +1003,10 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, else ktime_get_real_ts(&ts); - buf->buf.sequence = stream->sequence; - buf->buf.timestamp.tv_sec = ts.tv_sec; - buf->buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; + buf->buf.v4l2_buf.sequence = stream->sequence; + buf->buf.v4l2_buf.timestamp.tv_sec = ts.tv_sec; + buf->buf.v4l2_buf.timestamp.tv_usec = + ts.tv_nsec / NSEC_PER_USEC; /* TODO: Handle PTS and SCR. */ buf->state = UVC_BUF_STATE_ACTIVE; @@ -490,7 +1027,7 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, * avoids detecting end of frame conditions at FID toggling if the * previous payload had the EOF bit set. */ - if (fid != stream->last_fid && buf->buf.bytesused != 0) { + if (fid != stream->last_fid && buf->bytesused != 0) { uvc_trace(UVC_TRACE_FRAME, "Frame complete (FID bit " "toggled).\n"); buf->state = UVC_BUF_STATE_READY; @@ -505,7 +1042,6 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, static void uvc_video_decode_data(struct uvc_streaming *stream, struct uvc_buffer *buf, const __u8 *data, int len) { - struct uvc_video_queue *queue = &stream->queue; unsigned int maxlen, nbytes; void *mem; @@ -513,11 +1049,11 @@ static void uvc_video_decode_data(struct uvc_streaming *stream, return; /* Copy the video data to the buffer. */ - maxlen = buf->buf.length - buf->buf.bytesused; - mem = queue->mem + buf->buf.m.offset + buf->buf.bytesused; + maxlen = buf->length - buf->bytesused; + mem = buf->mem + buf->bytesused; nbytes = min((unsigned int)len, maxlen); memcpy(mem, data, nbytes); - buf->buf.bytesused += nbytes; + buf->bytesused += nbytes; /* Complete the current frame if the buffer size was exceeded. */ if (len > maxlen) { @@ -530,7 +1066,7 @@ static void uvc_video_decode_end(struct uvc_streaming *stream, struct uvc_buffer *buf, const __u8 *data, int len) { /* Mark the buffer as done if the EOF marker is set. */ - if (data[1] & UVC_STREAM_EOF && buf->buf.bytesused != 0) { + if (data[1] & UVC_STREAM_EOF && buf->bytesused != 0) { uvc_trace(UVC_TRACE_FRAME, "Frame complete (EOF found).\n"); if (data[0] == len) uvc_trace(UVC_TRACE_FRAME, "EOF in empty payload.\n"); @@ -568,8 +1104,8 @@ static int uvc_video_encode_data(struct uvc_streaming *stream, void *mem; /* Copy video data to the URB buffer. */ - mem = queue->mem + buf->buf.m.offset + queue->buf_used; - nbytes = min((unsigned int)len, buf->buf.bytesused - queue->buf_used); + mem = buf->mem + queue->buf_used; + nbytes = min((unsigned int)len, buf->bytesused - queue->buf_used); nbytes = min(stream->bulk.max_payload_size - stream->bulk.payload_size, nbytes); memcpy(data, mem, nbytes); @@ -624,7 +1160,7 @@ static void uvc_video_decode_isoc(struct urb *urb, struct uvc_streaming *stream, urb->iso_frame_desc[i].actual_length); if (buf->state == UVC_BUF_STATE_READY) { - if (buf->buf.length != buf->buf.bytesused && + if (buf->length != buf->bytesused && !(stream->cur_format->flags & UVC_FMT_FLAG_COMPRESSED)) buf->error = 1; @@ -724,12 +1260,12 @@ static void uvc_video_encode_bulk(struct urb *urb, struct uvc_streaming *stream, stream->bulk.payload_size += ret; len -= ret; - if (buf->buf.bytesused == stream->queue.buf_used || + if (buf->bytesused == stream->queue.buf_used || stream->bulk.payload_size == stream->bulk.max_payload_size) { - if (buf->buf.bytesused == stream->queue.buf_used) { + if (buf->bytesused == stream->queue.buf_used) { stream->queue.buf_used = 0; buf->state = UVC_BUF_STATE_READY; - buf->buf.sequence = ++stream->sequence; + buf->buf.v4l2_buf.sequence = ++stream->sequence; uvc_queue_next_buffer(&stream->queue, buf); stream->last_fid ^= UVC_STREAM_FID; } @@ -870,6 +1406,8 @@ static void uvc_uninit_video(struct uvc_streaming *stream, int free_buffers) struct urb *urb; unsigned int i; + uvc_video_stats_stop(stream); + for (i = 0; i < UVC_URBS; ++i) { urb = stream->urb[i]; if (urb == NULL) @@ -882,6 +1420,8 @@ static void uvc_uninit_video(struct uvc_streaming *stream, int free_buffers) if (free_buffers) uvc_free_urb_buffers(stream); + + uvc_video_clock_cleanup(stream); } /* @@ -1009,6 +1549,12 @@ static int uvc_init_video(struct uvc_streaming *stream, gfp_t gfp_flags) stream->bulk.skip_payload = 0; stream->bulk.payload_size = 0; + uvc_video_stats_start(stream); + + ret = uvc_video_clock_init(stream); + if (ret < 0) + return ret; + if (intf->num_altsetting > 1) { struct usb_host_endpoint *best_ep = NULL; unsigned int best_psize = 3 * 1024; @@ -1283,6 +1829,11 @@ int uvc_video_enable(struct uvc_streaming *stream, int enable) return ret; } - return uvc_init_video(stream, GFP_KERNEL); -} + ret = uvc_init_video(stream, GFP_KERNEL); + if (ret < 0) { + usb_set_interface(stream->dev->udev, stream->intfnum, 0); + uvc_queue_enable(&stream->queue, 0); + } + return ret; +} |