Introduce libavdevice

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

1 files changed, 193 insertions, 0 deletions

diff --git a/libavdevice/libdc1394.c b/libavdevice/libdc1394.c
new file mode 100644
index 0000000000..095a35af15
--- /dev/null
+++ b/libavdevice/libdc1394.c
@@ -0,0 +1,193 @@
+/*
+ * IIDC1394 grab interface (uses libdc1394 and libraw1394)
+ * Copyright (c) 2004 Roman Shaposhnik
+ *
+ * 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"
+
+#include <libraw1394/raw1394.h>
+#include <libdc1394/dc1394_control.h>
+
+#undef free
+
+typedef struct dc1394_data {
+    raw1394handle_t handle;
+    dc1394_cameracapture camera;
+    int current_frame;
+    int fps;
+
+    AVPacket packet;
+} dc1394_data;
+
+struct dc1394_frame_format {
+    int width;
+    int height;
+    enum PixelFormat pix_fmt;
+    int frame_size_id;
+} dc1394_frame_formats[] = {
+    { 320, 240, PIX_FMT_UYVY422, MODE_320x240_YUV422 },
+    { 640, 480, PIX_FMT_UYYVYY411, MODE_640x480_YUV411 },
+    { 640, 480, PIX_FMT_UYVY422, MODE_640x480_YUV422 },
+    {   0,   0, 0, MODE_320x240_YUV422 } /* default -- gotta be the last one */
+};
+
+struct dc1394_frame_rate {
+    int frame_rate;
+    int frame_rate_id;
+} dc1394_frame_rates[] = {
+    {  1875, FRAMERATE_1_875 },
+    {  3750, FRAMERATE_3_75  },
+    {  7500, FRAMERATE_7_5   },
+    { 15000, FRAMERATE_15    },
+    { 30000, FRAMERATE_30    },
+    { 60000, FRAMERATE_60    },
+    {     0, FRAMERATE_30    } /* default -- gotta be the last one */
+};
+
+static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
+{
+    dc1394_data* dc1394 = c->priv_data;
+    AVStream* vst;
+    nodeid_t* camera_nodes;
+    int res;
+    struct dc1394_frame_format *fmt;
+    struct dc1394_frame_rate *fps;
+
+    for (fmt = dc1394_frame_formats; fmt->width; fmt++)
+         if (fmt->pix_fmt == ap->pix_fmt && fmt->width == ap->width && fmt->height == ap->height)
+             break;
+
+    for (fps = dc1394_frame_rates; fps->frame_rate; fps++)
+         if (fps->frame_rate == av_rescale(1000, ap->time_base.den, ap->time_base.num))
+             break;
+
+    /* create a video stream */
+    vst = av_new_stream(c, 0);
+    if (!vst)
+        return -1;
+    av_set_pts_info(vst, 64, 1, 1000);
+    vst->codec->codec_type = CODEC_TYPE_VIDEO;
+    vst->codec->codec_id = CODEC_ID_RAWVIDEO;
+    vst->codec->time_base.den = fps->frame_rate;
+    vst->codec->time_base.num = 1000;
+    vst->codec->width = fmt->width;
+    vst->codec->height = fmt->height;
+    vst->codec->pix_fmt = fmt->pix_fmt;
+
+    /* packet init */
+    av_init_packet(&dc1394->packet);
+    dc1394->packet.size = avpicture_get_size(fmt->pix_fmt, fmt->width, fmt->height);
+    dc1394->packet.stream_index = vst->index;
+    dc1394->packet.flags |= PKT_FLAG_KEY;
+
+    dc1394->current_frame = 0;
+    dc1394->fps = fps->frame_rate;
+
+    vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, fps->frame_rate, 1000);
+
+    /* Now lets prep the hardware */
+    dc1394->handle = dc1394_create_handle(0); /* FIXME: gotta have ap->port */
+    if (!dc1394->handle) {
+        av_log(c, AV_LOG_ERROR, "Can't acquire dc1394 handle on port %d\n", 0 /* ap->port */);
+        goto out;
+    }
+    camera_nodes = dc1394_get_camera_nodes(dc1394->handle, &res, 1);
+    if (!camera_nodes || camera_nodes[ap->channel] == DC1394_NO_CAMERA) {
+        av_log(c, AV_LOG_ERROR, "There's no IIDC camera on the channel %d\n", ap->channel);
+        goto out_handle;
+    }
+    res = dc1394_dma_setup_capture(dc1394->handle, camera_nodes[ap->channel],
+                                   0,
+                                   FORMAT_VGA_NONCOMPRESSED,
+                                   fmt->frame_size_id,
+                                   SPEED_400,
+                                   fps->frame_rate_id, 8, 1,
+                                   c->filename,
+                                   &dc1394->camera);
+    dc1394_free_camera_nodes(camera_nodes);
+    if (res != DC1394_SUCCESS) {
+        av_log(c, AV_LOG_ERROR, "Can't prepare camera for the DMA capture\n");
+        goto out_handle;
+    }
+
+    res = dc1394_start_iso_transmission(dc1394->handle, dc1394->camera.node);
+    if (res != DC1394_SUCCESS) {
+        av_log(c, AV_LOG_ERROR, "Can't start isochronous transmission\n");
+        goto out_handle_dma;
+    }
+
+    return 0;
+
+out_handle_dma:
+    dc1394_dma_unlisten(dc1394->handle, &dc1394->camera);
+    dc1394_dma_release_camera(dc1394->handle, &dc1394->camera);
+out_handle:
+    dc1394_destroy_handle(dc1394->handle);
+out:
+    return -1;
+}
+
+static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt)
+{
+    struct dc1394_data *dc1394 = c->priv_data;
+    int res;
+
+    /* discard stale frame */
+    if (dc1394->current_frame++) {
+        if (dc1394_dma_done_with_buffer(&dc1394->camera) != DC1394_SUCCESS)
+            av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
+    }
+
+    res = dc1394_dma_single_capture(&dc1394->camera);
+
+    if (res == DC1394_SUCCESS) {
+        dc1394->packet.data = (uint8_t *)(dc1394->camera.capture_buffer);
+        dc1394->packet.pts = (dc1394->current_frame * 1000000) / dc1394->fps;
+        res = dc1394->packet.size;
+    } else {
+        av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
+        dc1394->packet.data = NULL;
+        res = -1;
+    }
+
+    *pkt = dc1394->packet;
+    return res;
+}
+
+static int dc1394_close(AVFormatContext * context)
+{
+    struct dc1394_data *dc1394 = context->priv_data;
+
+    dc1394_stop_iso_transmission(dc1394->handle, dc1394->camera.node);
+    dc1394_dma_unlisten(dc1394->handle, &dc1394->camera);
+    dc1394_dma_release_camera(dc1394->handle, &dc1394->camera);
+    dc1394_destroy_handle(dc1394->handle);
+
+    return 0;
+}
+
+AVInputFormat libdc1394_demuxer = {
+    .name           = "libdc1394",
+    .long_name      = "dc1394 A/V grab",
+    .priv_data_size = sizeof(struct dc1394_data),
+    .read_header    = dc1394_read_header,
+    .read_packet    = dc1394_read_packet,
+    .read_close     = dc1394_close,
+    .flags          = AVFMT_NOFILE
+};