* Introducing IIDC1394 grabbing interface.
[libav.git] / libavformat / dc1394.c
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f02be79d
RS
1/*
2 * IIDC1394 grab interface (uses libdc1394 and libraw1394)
3 * Copyright (c) 2004 Roman Shaposhnik
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include "avformat.h"
21
22#include <libraw1394/raw1394.h>
23#include <libdc1394/dc1394_control.h>
24
25#undef free
26
27typedef struct dc1394_data {
28 raw1394handle_t handle;
29 dc1394_cameracapture camera;
30 int current_frame;
31 int fps;
32
33 AVPacket packet;
34} dc1394_data;
35
36struct dc1394_frame_format {
37 int width;
38 int height;
39 enum PixelFormat pix_fmt;
40 int frame_size_id;
41} dc1394_frame_formats[] = {
42 { 320, 240, PIX_FMT_UYVY422, MODE_320x240_YUV422 },
43 { 640, 480, PIX_FMT_UYVY411, MODE_640x480_YUV411 },
44 { 640, 480, PIX_FMT_UYVY422, MODE_640x480_YUV422 },
45 { 0, 0, 0, MODE_320x240_YUV422 } /* default -- gotta be the last one */
46};
47
48struct dc1394_frame_rate {
49 int frame_rate;
50 int frame_rate_id;
51} dc1394_frame_rates[] = {
52 { 1875, FRAMERATE_1_875 },
53 { 3750, FRAMERATE_3_75 },
54 { 7500, FRAMERATE_7_5 },
55 { 15000, FRAMERATE_15 },
56 { 30000, FRAMERATE_30 },
57 { 60000, FRAMERATE_60 },
58 { 0, FRAMERATE_30 } /* default -- gotta be the last one */
59};
60
61static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
62{
63 dc1394_data* dc1394 = c->priv_data;
64 AVStream* vst;
65 nodeid_t* camera_nodes;
66 int res;
67 struct dc1394_frame_format *fmt;
68 struct dc1394_frame_rate *fps;
69
70 for (fmt = dc1394_frame_formats; fmt->width; fmt++)
71 if (fmt->pix_fmt == ap->pix_fmt && fmt->width == ap->width && fmt->height == ap->height)
72 break;
73
74 for (fps = dc1394_frame_rates; fps->frame_rate; fps++)
75 if (fps->frame_rate == av_rescale(1000, ap->frame_rate, ap->frame_rate_base))
76 break;
77
78 /* create a video stream */
79 vst = av_new_stream(c, 0);
80 if (!vst)
81 return -1;
82 av_set_pts_info(vst, 64, 1, 1000);
83 vst->codec.codec_type = CODEC_TYPE_VIDEO;
84 vst->codec.codec_id = CODEC_ID_RAWVIDEO;
85 vst->codec.frame_rate = fps->frame_rate;
86 vst->codec.frame_rate_base = 1000;
87 vst->codec.width = fmt->width;
88 vst->codec.height = fmt->height;
89 vst->codec.pix_fmt = fmt->pix_fmt;
90
91 /* packet init */
92 av_init_packet(&dc1394->packet);
93 dc1394->packet.size = avpicture_get_size(fmt->pix_fmt, fmt->width, fmt->height);
94 dc1394->packet.stream_index = vst->index;
95 dc1394->packet.flags |= PKT_FLAG_KEY;
96
97 dc1394->current_frame = 0;
98 dc1394->fps = fps->frame_rate;
99
100 vst->codec.bit_rate = av_rescale(dc1394->packet.size * 8, fps->frame_rate, 1000);
101
102 /* Now lets prep the hardware */
103 dc1394->handle = dc1394_create_handle(0); /* FIXME: gotta have ap->port */
104 if (!dc1394->handle) {
105 av_log(c, AV_LOG_ERROR, "Can't aquire dc1394 handle on port %d\n", 0 /* ap->port */);
106 goto out;
107 }
108 camera_nodes = dc1394_get_camera_nodes(dc1394->handle, &res, 1);
109 if (!camera_nodes || camera_nodes[ap->channel] == DC1394_NO_CAMERA) {
110 av_log(c, AV_LOG_ERROR, "There's no IIDC camera on the channel %d\n", ap->channel);
111 goto out_handle;
112 }
113 res = dc1394_dma_setup_capture(dc1394->handle, camera_nodes[ap->channel],
114 0,
115 FORMAT_VGA_NONCOMPRESSED,
116 fmt->frame_size_id,
117 SPEED_400,
118 fps->frame_rate_id, 8, 1,
119 ap->device,
120 &dc1394->camera);
121 dc1394_free_camera_nodes(camera_nodes);
122 if (res != DC1394_SUCCESS) {
123 av_log(c, AV_LOG_ERROR, "Can't prepare camera for the DMA capture\n");
124 goto out_handle;
125 }
126
127 res = dc1394_start_iso_transmission(dc1394->handle, dc1394->camera.node);
128 if (res != DC1394_SUCCESS) {
129 av_log(c, AV_LOG_ERROR, "Can't start isochronous transmission\n");
130 goto out_handle_dma;
131 }
132
133 return 0;
134
135out_handle_dma:
136 dc1394_dma_unlisten(dc1394->handle, &dc1394->camera);
137 dc1394_dma_release_camera(dc1394->handle, &dc1394->camera);
138out_handle:
139 dc1394_destroy_handle(dc1394->handle);
140out:
141 return -1;
142}
143
144static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt)
145{
146 struct dc1394_data *dc1394 = c->priv_data;
147 int res;
148
149 /* discard stale frame */
150 if (dc1394->current_frame++) {
151 if (dc1394_dma_done_with_buffer(&dc1394->camera) != DC1394_SUCCESS)
152 av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
153 }
154
155 res = dc1394_dma_single_capture(&dc1394->camera);
156
157 if (res == DC1394_SUCCESS) {
158 dc1394->packet.data = (uint8_t *)(dc1394->camera.capture_buffer);
159 dc1394->packet.pts = (dc1394->current_frame * 1000000) / dc1394->fps;
160 res = dc1394->packet.size;
161 } else {
162 av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
163 dc1394->packet.data = NULL;
164 res = -1;
165 }
166
167 *pkt = dc1394->packet;
168 return res;
169}
170
171static int dc1394_close(AVFormatContext * context)
172{
173 struct dc1394_data *dc1394 = context->priv_data;
174
175 dc1394_stop_iso_transmission(dc1394->handle, dc1394->camera.node);
176 dc1394_dma_unlisten(dc1394->handle, &dc1394->camera);
177 dc1394_dma_release_camera(dc1394->handle, &dc1394->camera);
178 dc1394_destroy_handle(dc1394->handle);
179
180 return 0;
181}
182
183static AVInputFormat dc1394_format = {
184 .name = "dc1394",
185 .long_name = "dc1394 A/V grab",
186 .priv_data_size = sizeof(struct dc1394_data),
187 .read_header = dc1394_read_header,
188 .read_packet = dc1394_read_packet,
189 .read_close = dc1394_close,
190 .flags = AVFMT_NOFILE
191};
192
193int dc1394_init(void)
194{
195 av_register_input_format(&dc1394_format);
196 return 0;
197}