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#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <pthread.h>
#include <libdv/dv.h>
#include "grab-ng.h"
#include "list.h"
/* ----------------------------------------------------------------------- */
struct dv_frame {
struct list_head list;
int seq;
int video,audio;
unsigned char obuf[0];
};
struct dv_handle {
/* handles */
int fd;
dv_encoder_t *enc;
/* format */
struct ng_video_fmt video;
struct ng_audio_fmt audio;
/* misc */
int framesize, fvideo, faudio;
struct list_head frames;
};
/* ----------------------------------------------------------------------- */
static struct dv_frame*
dv_get_frame(struct dv_handle *h, int nr)
{
struct dv_frame *frame = NULL;
struct list_head *item;
list_for_each(item,&h->frames) {
frame = list_entry(item,struct dv_frame,list);
if (frame->seq == nr)
break;
}
if (NULL == frame || frame->seq != nr) {
frame = malloc(sizeof(*frame) + h->framesize);
memset(frame,0,sizeof(*frame) + h->framesize);
frame->seq = nr;
list_add_tail(&frame->list,&h->frames);
}
return frame;
}
static int dv_put_frame(struct dv_handle *h, struct dv_frame *frame)
{
int rc;
if (h->video.fmtid && !frame->video)
return 0;
if (h->audio.fmtid && !frame->audio)
return 0;
if (ng_debug)
fprintf(stderr,"dv: write frame #%d\n",frame->seq);
rc = write(h->fd, frame->obuf, h->framesize);
list_del(&frame->list);
free(frame);
return (rc == h->framesize) ? 0 : -1;
}
/* ----------------------------------------------------------------------- */
static void*
dv_open(char *filename, char *dummy,
struct ng_video_fmt *video, const void *priv_video, int fps,
struct ng_audio_fmt *audio, const void *priv_audio)
{
struct dv_handle *h;
if (NULL == (h = malloc(sizeof(*h))))
return NULL;
memset(h,0,sizeof(*h));
h->video = *video;
h->audio = *audio;
if (-1 == (h->fd = open(filename,O_CREAT | O_RDWR | O_TRUNC, 0666))) {
fprintf(stderr,"open %s: %s\n",filename,strerror(errno));
goto fail;
}
h->enc = dv_encoder_new(0,0,0);
if (NULL == h->enc) {
fprintf(stderr,"dv: dv_encoder_new failed\n");
goto fail;
}
if (h->audio.fmtid != AUDIO_NONE) {
}
if (h->video.fmtid != VIDEO_NONE) {
if (720 == h->video.width &&
480 == h->video.height &&
30000 == fps) {
/* NTSC */
h->enc->isPAL = 0;
h->framesize = 120000;
} else if (720 == h->video.width &&
576 == h->video.height &&
25000 == fps) {
/* PAL */
h->enc->isPAL = 1;
h->framesize = 144000;
} else {
fprintf(stderr,
"dv: %dx%d @ %d fps is not allowed for digital video\n"
"dv: use 720x480/30 (NTSC) or 720x576/25 (PAL)\n",
h->video.width, h->video.height, fps/1000);
goto fail;
}
}
INIT_LIST_HEAD(&h->frames);
return h;
fail:
if (h->enc)
dv_encoder_free(h->enc);
if (-1 != h->fd)
close(h->fd);
free(h);
return NULL;
}
static int
dv_video(void *handle, struct ng_video_buf *buf)
{
struct dv_handle *h = handle;
struct dv_frame *frame;
unsigned char *pixels[3];
frame = dv_get_frame(h,h->fvideo);
pixels[0] = buf->data;
switch (buf->fmt.fmtid) {
case VIDEO_YUYV:
dv_encode_full_frame(h->enc,pixels,e_dv_color_yuv,frame->obuf);
break;
case VIDEO_RGB24:
dv_encode_full_frame(h->enc,pixels,e_dv_color_rgb,frame->obuf);
break;
case VIDEO_BGR32:
dv_encode_full_frame(h->enc,pixels,e_dv_color_bgr0,frame->obuf);
break;
default:
BUG_ON(1,"unknown fmtid");
}
frame->video = 1;
dv_put_frame(h,frame);
h->fvideo++;
return 0;
}
static int
dv_audio(void *handle, struct ng_audio_buf *buf)
{
//struct dv_handle *h = handle;
//struct dv_frame *frame;
return -1;
}
static int
dv_close(void *handle)
{
struct dv_handle *h = handle;
dv_encoder_free(h->enc);
close(h->fd);
free(h);
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct ng_format_list dv_vformats[] = {
{
.name = "dv",
.ext = "dv",
.desc = "digital video",
.fmtid = VIDEO_YUYV,
},{
/* EOF */
}
};
#if 0
static const struct ng_format_list dv_aformats[] = {
{
.name = "stereo16",
.ext = "dv",
.fmtid = AUDIO_S16_NATIVE_STEREO,
},{
/* EOF */
}
};
#endif
struct ng_writer dv_writer = {
.name = "dv",
.desc = "Digital Video",
//.combined = 1,
.video = dv_vformats,
//.audio = dv_aformats,
.wr_open = dv_open,
.wr_video = dv_video,
.wr_audio = dv_audio,
.wr_close = dv_close,
};
extern void ng_plugin_init(void);
void ng_plugin_init(void)
{
//ng_writer_register(NG_PLUGIN_MAGIC,__FILE__,&dv_writer);
}
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