Introduce libavdevice

Originally committed as revision 11077 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 320 insertions, 0 deletions

diff --git a/libavdevice/bktr.c b/libavdevice/bktr.c
new file mode 100644
index 0000000000..0ea8dfb02c
--- /dev/null
+++ b/libavdevice/bktr.c
@@ -0,0 +1,320 @@
+/*
+ * *BSD video grab interface
+ * Copyright (c) 2002 Steve O'Hara-Smith
+ * based on
+ *           Linux video grab interface
+ *           Copyright (c) 2000,2001 Gerard Lantau.
+ * and
+ *           simple_grab.c Copyright (c) 1999 Roger Hardiman
+ *
+ * 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 "avformat.h"
+#if defined (HAVE_DEV_BKTR_IOCTL_METEOR_H) && defined (HAVE_DEV_BKTR_IOCTL_BT848_H)
+# include <dev/bktr/ioctl_meteor.h>
+# include <dev/bktr/ioctl_bt848.h>
+#elif defined (HAVE_MACHINE_IOCTL_METEOR_H) && defined (HAVE_MACHINE_IOCTL_BT848_H)
+# include <machine/ioctl_meteor.h>
+# include <machine/ioctl_bt848.h>
+#elif defined (HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H) && defined (HAVE_DEV_VIDEO_METEOR_IOCTL_BT848_H)
+# include <dev/video/meteor/ioctl_meteor.h>
+# include <dev/video/bktr/ioctl_bt848.h>
+#elif HAVE_DEV_IC_BT8XX_H
+# include <dev/ic/bt8xx.h>
+#endif
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <signal.h>
+
+typedef struct {
+    int video_fd;
+    int tuner_fd;
+    int width, height;
+    int frame_rate;
+    int frame_rate_base;
+    u_int64_t per_frame;
+} VideoData;
+
+
+#define PAL 1
+#define PALBDGHI 1
+#define NTSC 2
+#define NTSCM 2
+#define SECAM 3
+#define PALN 4
+#define PALM 5
+#define NTSCJ 6
+
+/* PAL is 768 x 576. NTSC is 640 x 480 */
+#define PAL_HEIGHT 576
+#define SECAM_HEIGHT 576
+#define NTSC_HEIGHT 480
+
+#ifndef VIDEO_FORMAT
+#define VIDEO_FORMAT NTSC
+#endif
+
+static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
+    METEOR_DEV3, METEOR_DEV_SVIDEO };
+
+uint8_t *video_buf;
+size_t video_buf_size;
+u_int64_t last_frame_time;
+volatile sig_atomic_t nsignals;
+
+
+static void catchsignal(int signal)
+{
+    nsignals++;
+    return;
+}
+
+static int bktr_init(const char *video_device, int width, int height,
+    int format, int *video_fd, int *tuner_fd, int idev, double frequency)
+{
+    struct meteor_geomet geo;
+    int h_max;
+    long ioctl_frequency;
+    char *arg;
+    int c;
+    struct sigaction act, old;
+
+    if (idev < 0 || idev > 4)
+    {
+        arg = getenv ("BKTR_DEV");
+        if (arg)
+            idev = atoi (arg);
+        if (idev < 0 || idev > 4)
+            idev = 1;
+    }
+
+    if (format < 1 || format > 6)
+    {
+        arg = getenv ("BKTR_FORMAT");
+        if (arg)
+            format = atoi (arg);
+        if (format < 1 || format > 6)
+            format = VIDEO_FORMAT;
+    }
+
+    if (frequency <= 0)
+    {
+        arg = getenv ("BKTR_FREQUENCY");
+        if (arg)
+            frequency = atof (arg);
+        if (frequency <= 0)
+            frequency = 0.0;
+    }
+
+    memset(&act, 0, sizeof(act));
+    sigemptyset(&act.sa_mask);
+    act.sa_handler = catchsignal;
+    sigaction(SIGUSR1, &act, &old);
+
+    *tuner_fd = open("/dev/tuner0", O_RDONLY);
+    if (*tuner_fd < 0)
+        av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
+
+    *video_fd = open(video_device, O_RDONLY);
+    if (*video_fd < 0) {
+        av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
+        return -1;
+    }
+
+    geo.rows = height;
+    geo.columns = width;
+    geo.frames = 1;
+    geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
+
+    switch (format) {
+    case PAL:   h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALBDGHI; break;
+    case PALN:  h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALN;     break;
+    case PALM:  h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALM;     break;
+    case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM;    break;
+    case NTSC:  h_max = NTSC_HEIGHT;  c = BT848_IFORM_F_NTSCM;    break;
+    case NTSCJ: h_max = NTSC_HEIGHT;  c = BT848_IFORM_F_NTSCJ;    break;
+    default:    h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALBDGHI; break;
+    }
+
+    if (height <= h_max / 2)
+        geo.oformat |= METEOR_GEO_EVEN_ONLY;
+
+    if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
+        av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
+        return -1;
+    }
+
+    if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
+        av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
+        return -1;
+    }
+
+    c = bktr_dev[idev];
+    if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
+        av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
+        return -1;
+    }
+
+    video_buf_size = width * height * 12 / 8;
+
+    video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
+        PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
+    if (video_buf == MAP_FAILED) {
+        av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
+        return -1;
+    }
+
+    if (frequency != 0.0) {
+        ioctl_frequency  = (unsigned long)(frequency*16);
+        if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
+            av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
+    }
+
+    c = AUDIO_UNMUTE;
+    if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
+        av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
+
+    c = METEOR_CAP_CONTINOUS;
+    ioctl(*video_fd, METEORCAPTUR, &c);
+
+    c = SIGUSR1;
+    ioctl(*video_fd, METEORSSIGNAL, &c);
+
+    return 0;
+}
+
+static void bktr_getframe(u_int64_t per_frame)
+{
+    u_int64_t curtime;
+
+    curtime = av_gettime();
+    if (!last_frame_time
+        || ((last_frame_time + per_frame) > curtime)) {
+        if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
+            if (!nsignals)
+                av_log(NULL, AV_LOG_INFO,
+                       "SLEPT NO signals - %d microseconds late\n",
+                       (int)(av_gettime() - last_frame_time - per_frame));
+        }
+    }
+    nsignals = 0;
+    last_frame_time = curtime;
+}
+
+
+/* note: we support only one picture read at a time */
+static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+    VideoData *s = s1->priv_data;
+
+    if (av_new_packet(pkt, video_buf_size) < 0)
+        return AVERROR(EIO);
+
+    bktr_getframe(s->per_frame);
+
+    pkt->pts = av_gettime();
+    memcpy(pkt->data, video_buf, video_buf_size);
+
+    return video_buf_size;
+}
+
+static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
+{
+    VideoData *s = s1->priv_data;
+    AVStream *st;
+    int width, height;
+    int frame_rate;
+    int frame_rate_base;
+    int format = -1;
+
+    if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
+        return -1;
+
+    width = ap->width;
+    height = ap->height;
+    frame_rate = ap->time_base.den;
+    frame_rate_base = ap->time_base.num;
+
+    st = av_new_stream(s1, 0);
+    if (!st)
+        return AVERROR(ENOMEM);
+    av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
+
+    s->width = width;
+    s->height = height;
+    s->frame_rate = frame_rate;
+    s->frame_rate_base = frame_rate_base;
+    s->per_frame = ((u_int64_t)1000000 * s->frame_rate_base) / s->frame_rate;
+
+    st->codec->codec_type = CODEC_TYPE_VIDEO;
+    st->codec->pix_fmt = PIX_FMT_YUV420P;
+    st->codec->codec_id = CODEC_ID_RAWVIDEO;
+    st->codec->width = width;
+    st->codec->height = height;
+    st->codec->time_base.den = frame_rate;
+    st->codec->time_base.num = frame_rate_base;
+
+    if (ap->standard) {
+        if (!strcasecmp(ap->standard, "pal"))
+            format = PAL;
+        else if (!strcasecmp(ap->standard, "secam"))
+            format = SECAM;
+        else if (!strcasecmp(ap->standard, "ntsc"))
+            format = NTSC;
+    }
+
+    if (bktr_init(s1->filename, width, height, format,
+            &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0)
+        return AVERROR(EIO);
+
+    nsignals = 0;
+    last_frame_time = 0;
+
+    return 0;
+}
+
+static int grab_read_close(AVFormatContext *s1)
+{
+    VideoData *s = s1->priv_data;
+    int c;
+
+    c = METEOR_CAP_STOP_CONT;
+    ioctl(s->video_fd, METEORCAPTUR, &c);
+    close(s->video_fd);
+
+    c = AUDIO_MUTE;
+    ioctl(s->tuner_fd, BT848_SAUDIO, &c);
+    close(s->tuner_fd);
+
+    munmap((caddr_t)video_buf, video_buf_size);
+
+    return 0;
+}
+
+AVInputFormat bktr_demuxer = {
+    "bktr",
+    "video grab",
+    sizeof(VideoData),
+    NULL,
+    grab_read_header,
+    grab_read_packet,
+    grab_read_close,
+    .flags = AVFMT_NOFILE,
+};