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-rw-r--r--libavdevice/dv1394.c239
1 files changed, 0 insertions, 239 deletions
diff --git a/libavdevice/dv1394.c b/libavdevice/dv1394.c
deleted file mode 100644
index c3483010fa..0000000000
--- a/libavdevice/dv1394.c
+++ /dev/null
@@ -1,239 +0,0 @@
-/*
- * Linux DV1394 interface
- * Copyright (c) 2003 Max Krasnyansky <maxk@qualcomm.com>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "config.h"
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <poll.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-
-#include "libavutil/internal.h"
-#include "libavutil/log.h"
-#include "libavutil/opt.h"
-#include "avdevice.h"
-#include "libavformat/dv.h"
-#include "dv1394.h"
-
-struct dv1394_data {
- AVClass *class;
- int fd;
- int channel;
- int format;
-
- uint8_t *ring; /* Ring buffer */
- int index; /* Current frame index */
- int avail; /* Number of frames available for reading */
- int done; /* Number of completed frames */
-
- DVDemuxContext* dv_demux; /* Generic DV muxing/demuxing context */
-};
-
-/*
- * The trick here is to kludge around well known problem with kernel Ooopsing
- * when you try to capture PAL on a device node configure for NTSC. That's
- * why we have to configure the device node for PAL, and then read only NTSC
- * amount of data.
- */
-static int dv1394_reset(struct dv1394_data *dv)
-{
- struct dv1394_init init;
-
- init.channel = dv->channel;
- init.api_version = DV1394_API_VERSION;
- init.n_frames = DV1394_RING_FRAMES;
- init.format = DV1394_PAL;
-
- if (ioctl(dv->fd, DV1394_INIT, &init) < 0)
- return -1;
-
- dv->avail = dv->done = 0;
- return 0;
-}
-
-static int dv1394_start(struct dv1394_data *dv)
-{
- /* Tell DV1394 driver to enable receiver */
- if (ioctl(dv->fd, DV1394_START_RECEIVE, 0) < 0) {
- av_log(NULL, AV_LOG_ERROR, "Failed to start receiver: %s\n", strerror(errno));
- return -1;
- }
- return 0;
-}
-
-static int dv1394_read_header(AVFormatContext * context)
-{
- struct dv1394_data *dv = context->priv_data;
-
- dv->dv_demux = avpriv_dv_init_demux(context);
- if (!dv->dv_demux)
- goto failed;
-
- /* Open and initialize DV1394 device */
- dv->fd = avpriv_open(context->filename, O_RDONLY);
- if (dv->fd < 0) {
- av_log(context, AV_LOG_ERROR, "Failed to open DV interface: %s\n", strerror(errno));
- goto failed;
- }
-
- if (dv1394_reset(dv) < 0) {
- av_log(context, AV_LOG_ERROR, "Failed to initialize DV interface: %s\n", strerror(errno));
- goto failed;
- }
-
- dv->ring = mmap(NULL, DV1394_PAL_FRAME_SIZE * DV1394_RING_FRAMES,
- PROT_READ, MAP_PRIVATE, dv->fd, 0);
- if (dv->ring == MAP_FAILED) {
- av_log(context, AV_LOG_ERROR, "Failed to mmap DV ring buffer: %s\n", strerror(errno));
- goto failed;
- }
-
- if (dv1394_start(dv) < 0)
- goto failed;
-
- return 0;
-
-failed:
- close(dv->fd);
- return AVERROR(EIO);
-}
-
-static int dv1394_read_packet(AVFormatContext *context, AVPacket *pkt)
-{
- struct dv1394_data *dv = context->priv_data;
- int size;
-
- size = avpriv_dv_get_packet(dv->dv_demux, pkt);
- if (size > 0)
- return size;
-
- if (!dv->avail) {
- struct dv1394_status s;
- struct pollfd p;
-
- if (dv->done) {
- /* Request more frames */
- if (ioctl(dv->fd, DV1394_RECEIVE_FRAMES, dv->done) < 0) {
- /* This usually means that ring buffer overflowed.
- * We have to reset :(.
- */
-
- av_log(context, AV_LOG_ERROR, "DV1394: Ring buffer overflow. Resetting ..\n");
-
- dv1394_reset(dv);
- dv1394_start(dv);
- }
- dv->done = 0;
- }
-
- /* Wait until more frames are available */
-restart_poll:
- p.fd = dv->fd;
- p.events = POLLIN | POLLERR | POLLHUP;
- if (poll(&p, 1, -1) < 0) {
- if (errno == EAGAIN || errno == EINTR)
- goto restart_poll;
- av_log(context, AV_LOG_ERROR, "Poll failed: %s\n", strerror(errno));
- return AVERROR(EIO);
- }
-
- if (ioctl(dv->fd, DV1394_GET_STATUS, &s) < 0) {
- av_log(context, AV_LOG_ERROR, "Failed to get status: %s\n", strerror(errno));
- return AVERROR(EIO);
- }
- av_log(context, AV_LOG_TRACE, "DV1394: status\n"
- "\tactive_frame\t%d\n"
- "\tfirst_clear_frame\t%d\n"
- "\tn_clear_frames\t%d\n"
- "\tdropped_frames\t%d\n",
- s.active_frame, s.first_clear_frame,
- s.n_clear_frames, s.dropped_frames);
-
- dv->avail = s.n_clear_frames;
- dv->index = s.first_clear_frame;
- dv->done = 0;
-
- if (s.dropped_frames) {
- av_log(context, AV_LOG_ERROR, "DV1394: Frame drop detected (%d). Resetting ..\n",
- s.dropped_frames);
-
- dv1394_reset(dv);
- dv1394_start(dv);
- }
- }
-
- av_log(context, AV_LOG_TRACE, "index %d, avail %d, done %d\n", dv->index, dv->avail,
- dv->done);
-
- size = avpriv_dv_produce_packet(dv->dv_demux, pkt,
- dv->ring + (dv->index * DV1394_PAL_FRAME_SIZE),
- DV1394_PAL_FRAME_SIZE, -1);
- dv->index = (dv->index + 1) % DV1394_RING_FRAMES;
- dv->done++; dv->avail--;
-
- return size;
-}
-
-static int dv1394_close(AVFormatContext * context)
-{
- struct dv1394_data *dv = context->priv_data;
-
- /* Shutdown DV1394 receiver */
- if (ioctl(dv->fd, DV1394_SHUTDOWN, 0) < 0)
- av_log(context, AV_LOG_ERROR, "Failed to shutdown DV1394: %s\n", strerror(errno));
-
- /* Unmap ring buffer */
- if (munmap(dv->ring, DV1394_NTSC_FRAME_SIZE * DV1394_RING_FRAMES) < 0)
- av_log(context, AV_LOG_ERROR, "Failed to munmap DV1394 ring buffer: %s\n", strerror(errno));
-
- close(dv->fd);
- av_freep(&dv->dv_demux);
-
- return 0;
-}
-
-static const AVOption options[] = {
- { "standard", "", offsetof(struct dv1394_data, format), AV_OPT_TYPE_INT, {.i64 = DV1394_NTSC}, DV1394_NTSC, DV1394_PAL, AV_OPT_FLAG_DECODING_PARAM, "standard" },
- { "PAL", "", 0, AV_OPT_TYPE_CONST, {.i64 = DV1394_PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
- { "NTSC", "", 0, AV_OPT_TYPE_CONST, {.i64 = DV1394_NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
- { "channel", "", offsetof(struct dv1394_data, channel), AV_OPT_TYPE_INT, {.i64 = DV1394_DEFAULT_CHANNEL}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
- { NULL },
-};
-
-static const AVClass dv1394_class = {
- .class_name = "DV1394 indev",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
- .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
-};
-
-AVInputFormat ff_dv1394_demuxer = {
- .name = "dv1394",
- .long_name = NULL_IF_CONFIG_SMALL("DV1394 A/V grab"),
- .priv_data_size = sizeof(struct dv1394_data),
- .read_header = dv1394_read_header,
- .read_packet = dv1394_read_packet,
- .read_close = dv1394_close,
- .flags = AVFMT_NOFILE,
- .priv_class = &dv1394_class,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-22 22:42:01 +0000