+++ /dev/null
-/*
- * Linux DV1394 interface
- * Copyright (c) 2003 Max Krasnyansky <maxk@qualcomm.com>
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/poll.h>
-#include <sys/time.h>
-#include <time.h>
-
-#include "avformat.h"
-
-#undef DV1394_DEBUG
-
-#include "dv1394.h"
-
-struct dv1394_data {
- int fd;
- int channel;
- int width, height;
- int frame_rate;
- int frame_size;
- int format;
-
- void *ring; /* Ring buffer */
- int index; /* Current frame index */
- int avail; /* Number of frames available for reading */
- int done; /* Number of completed frames */
-
- int stream; /* Current stream. 0 - video, 1 - audio */
- int64_t pts; /* Current timestamp */
- AVStream *vst, *ast;
-};
-
-/*
- * 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;
- dv->stream = 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) {
- perror("Failed to start receiver");
- return -1;
- }
- return 0;
-}
-
-static int dv1394_read_header(AVFormatContext * context, AVFormatParameters * ap)
-{
- struct dv1394_data *dv = context->priv_data;
- const char *video_device;
-
- dv->vst = av_new_stream(context, 0);
- if (!dv->vst)
- return -ENOMEM;
- dv->ast = av_new_stream(context, 1);
- if (!dv->ast) {
- av_free(dv->vst);
- return -ENOMEM;
- }
-
- if (ap->standard && !strcasecmp(ap->standard, "pal"))
- dv->format = DV1394_PAL;
- else
- dv->format = DV1394_NTSC;
-
- if (ap->channel)
- dv->channel = ap->channel;
- else
- dv->channel = DV1394_DEFAULT_CHANNEL;
-
- dv->width = DV1394_WIDTH;
- if (dv->format == DV1394_NTSC) {
- dv->height = DV1394_NTSC_HEIGHT;
- dv->frame_size = DV1394_NTSC_FRAME_SIZE;
- dv->frame_rate = 30;
- } else {
- dv->height = DV1394_PAL_HEIGHT;
- dv->frame_size = DV1394_PAL_FRAME_SIZE;
- dv->frame_rate = 25;
- }
-
- /* Open and initialize DV1394 device */
- video_device = ap->device;
- if (!video_device)
- video_device = "/dev/dv1394/0";
- dv->fd = open(video_device, O_RDONLY);
- if (dv->fd < 0) {
- perror("Failed to open DV interface");
- goto failed;
- }
-
- if (dv1394_reset(dv) < 0) {
- perror("Failed to initialize DV interface");
- 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) {
- perror("Failed to mmap DV ring buffer");
- goto failed;
- }
-
- dv->stream = 0;
-
- dv->vst->codec.codec_type = CODEC_TYPE_VIDEO;
- dv->vst->codec.codec_id = CODEC_ID_DVVIDEO;
- dv->vst->codec.width = dv->width;
- dv->vst->codec.height = dv->height;
- dv->vst->codec.frame_rate = dv->frame_rate;
- dv->vst->codec.frame_rate_base = 1;
- dv->vst->codec.bit_rate = 25000000; /* Consumer DV is 25Mbps */
-
- dv->ast->codec.codec_type = CODEC_TYPE_AUDIO;
- dv->ast->codec.codec_id = CODEC_ID_DVAUDIO;
- dv->ast->codec.channels = 2;
- dv->ast->codec.sample_rate= 48000;
-
- av_set_pts_info(context, 48, 1, 1000000);
-
- if (dv1394_start(dv) < 0)
- goto failed;
-
- return 0;
-
-failed:
- close(dv->fd);
- av_free(dv->vst);
- av_free(dv->ast);
- return -EIO;
-}
-
-static void __destruct_pkt(struct AVPacket *pkt)
-{
- pkt->data = NULL; pkt->size = 0;
- return;
-}
-
-static inline int __get_frame(struct dv1394_data *dv, AVPacket *pkt)
-{
- char *ptr = dv->ring + (dv->index * DV1394_PAL_FRAME_SIZE);
-
- if (dv->stream) {
- dv->index = (dv->index + 1) % DV1394_RING_FRAMES;
- dv->done++; dv->avail--;
- } else {
- dv->pts = av_gettime() & ((1LL << 48) - 1);
- }
-
- dv->format = ((ptr[3] & 0x80) == 0) ? DV1394_NTSC : DV1394_PAL;
- if (dv->format == DV1394_NTSC) {
- dv->frame_size = DV1394_NTSC_FRAME_SIZE;
- dv->vst->codec.height = dv->height = DV1394_NTSC_HEIGHT;
- dv->vst->codec.frame_rate = dv->frame_rate = 30;
- } else {
- dv->frame_size = DV1394_PAL_FRAME_SIZE;
- dv->vst->codec.height = dv->height = DV1394_PAL_HEIGHT;
- dv->vst->codec.frame_rate = dv->frame_rate = 25;
- }
-
- av_init_packet(pkt);
- pkt->destruct = __destruct_pkt;
- pkt->data = ptr;
- pkt->size = dv->frame_size;
- pkt->pts = dv->pts;
- pkt->stream_index = dv->stream;
- pkt->flags |= PKT_FLAG_KEY;
-
- dv->stream ^= 1;
-
- return dv->frame_size;
-}
-
-static int dv1394_read_packet(AVFormatContext *context, AVPacket *pkt)
-{
- struct dv1394_data *dv = context->priv_data;
-
- 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 :(.
- */
-
- fprintf(stderr, "DV1394: Ring buffer overflow. Reseting ..\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;
- perror("Poll failed");
- return -EIO;
- }
-
- if (ioctl(dv->fd, DV1394_GET_STATUS, &s) < 0) {
- perror("Failed to get status");
- return -EIO;
- }
-#ifdef DV1394_DEBUG
- fprintf(stderr, "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);
-#endif
-
- dv->avail = s.n_clear_frames;
- dv->index = s.first_clear_frame;
- dv->done = 0;
-
- if (s.dropped_frames) {
- fprintf(stderr, "DV1394: Frame drop detected (%d). Reseting ..\n",
- s.dropped_frames);
-
- dv1394_reset(dv);
- dv1394_start(dv);
- }
- }
-
-#ifdef DV1394_DEBUG
- fprintf(stderr, "index %d, avail %d, done %d\n", dv->index, dv->avail,
- dv->done);
-#endif
-
- return __get_frame(dv, pkt);
-}
-
-static int dv1394_close(AVFormatContext * context)
-{
- struct dv1394_data *dv = context->priv_data;
-
- /* Shutdown DV1394 receiver */
- if (ioctl(dv->fd, DV1394_SHUTDOWN, 0) < 0)
- perror("Failed to shutdown DV1394");
-
- /* Unmap ring buffer */
- if (munmap(dv->ring, DV1394_NTSC_FRAME_SIZE * DV1394_RING_FRAMES) < 0)
- perror("Failed to munmap DV1394 ring buffer");
-
- close(dv->fd);
-
- return 0;
-}
-
-static AVInputFormat dv1394_format = {
- .name = "dv1394",
- .long_name = "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
-};
-
-int dv1394_init(void)
-{
- av_register_input_format(&dv1394_format);
- return 0;
-}
projects / synfig.git / blobdiff