Make av_read_frame with rtsp client return EINTR on interrupt
[libav.git] / libavformat / libdc1394.c
1 /*
2 * IIDC1394 grab interface (uses libdc1394 and libraw1394)
3 * Copyright (c) 2004 Roman Shaposhnik
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "avformat.h"
23
24 #include <libraw1394/raw1394.h>
25 #include <libdc1394/dc1394_control.h>
26
27 #undef free
28
29 typedef struct dc1394_data {
30 raw1394handle_t handle;
31 dc1394_cameracapture camera;
32 int current_frame;
33 int fps;
34
35 AVPacket packet;
36 } dc1394_data;
37
38 struct dc1394_frame_format {
39 int width;
40 int height;
41 enum PixelFormat pix_fmt;
42 int frame_size_id;
43 } dc1394_frame_formats[] = {
44 { 320, 240, PIX_FMT_UYVY422, MODE_320x240_YUV422 },
45 { 640, 480, PIX_FMT_UYYVYY411, MODE_640x480_YUV411 },
46 { 640, 480, PIX_FMT_UYVY422, MODE_640x480_YUV422 },
47 { 0, 0, 0, MODE_320x240_YUV422 } /* default -- gotta be the last one */
48 };
49
50 struct dc1394_frame_rate {
51 int frame_rate;
52 int frame_rate_id;
53 } dc1394_frame_rates[] = {
54 { 1875, FRAMERATE_1_875 },
55 { 3750, FRAMERATE_3_75 },
56 { 7500, FRAMERATE_7_5 },
57 { 15000, FRAMERATE_15 },
58 { 30000, FRAMERATE_30 },
59 { 60000, FRAMERATE_60 },
60 { 0, FRAMERATE_30 } /* default -- gotta be the last one */
61 };
62
63 static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
64 {
65 dc1394_data* dc1394 = c->priv_data;
66 AVStream* vst;
67 nodeid_t* camera_nodes;
68 int res;
69 struct dc1394_frame_format *fmt;
70 struct dc1394_frame_rate *fps;
71
72 for (fmt = dc1394_frame_formats; fmt->width; fmt++)
73 if (fmt->pix_fmt == ap->pix_fmt && fmt->width == ap->width && fmt->height == ap->height)
74 break;
75
76 for (fps = dc1394_frame_rates; fps->frame_rate; fps++)
77 if (fps->frame_rate == av_rescale(1000, ap->time_base.den, ap->time_base.num))
78 break;
79
80 /* create a video stream */
81 vst = av_new_stream(c, 0);
82 if (!vst)
83 return -1;
84 av_set_pts_info(vst, 64, 1, 1000);
85 vst->codec->codec_type = CODEC_TYPE_VIDEO;
86 vst->codec->codec_id = CODEC_ID_RAWVIDEO;
87 vst->codec->time_base.den = fps->frame_rate;
88 vst->codec->time_base.num = 1000;
89 vst->codec->width = fmt->width;
90 vst->codec->height = fmt->height;
91 vst->codec->pix_fmt = fmt->pix_fmt;
92
93 /* packet init */
94 av_init_packet(&dc1394->packet);
95 dc1394->packet.size = avpicture_get_size(fmt->pix_fmt, fmt->width, fmt->height);
96 dc1394->packet.stream_index = vst->index;
97 dc1394->packet.flags |= PKT_FLAG_KEY;
98
99 dc1394->current_frame = 0;
100 dc1394->fps = fps->frame_rate;
101
102 vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, fps->frame_rate, 1000);
103
104 /* Now lets prep the hardware */
105 dc1394->handle = dc1394_create_handle(0); /* FIXME: gotta have ap->port */
106 if (!dc1394->handle) {
107 av_log(c, AV_LOG_ERROR, "Can't acquire dc1394 handle on port %d\n", 0 /* ap->port */);
108 goto out;
109 }
110 camera_nodes = dc1394_get_camera_nodes(dc1394->handle, &res, 1);
111 if (!camera_nodes || camera_nodes[ap->channel] == DC1394_NO_CAMERA) {
112 av_log(c, AV_LOG_ERROR, "There's no IIDC camera on the channel %d\n", ap->channel);
113 goto out_handle;
114 }
115 res = dc1394_dma_setup_capture(dc1394->handle, camera_nodes[ap->channel],
116 0,
117 FORMAT_VGA_NONCOMPRESSED,
118 fmt->frame_size_id,
119 SPEED_400,
120 fps->frame_rate_id, 8, 1,
121 c->filename,
122 &dc1394->camera);
123 dc1394_free_camera_nodes(camera_nodes);
124 if (res != DC1394_SUCCESS) {
125 av_log(c, AV_LOG_ERROR, "Can't prepare camera for the DMA capture\n");
126 goto out_handle;
127 }
128
129 res = dc1394_start_iso_transmission(dc1394->handle, dc1394->camera.node);
130 if (res != DC1394_SUCCESS) {
131 av_log(c, AV_LOG_ERROR, "Can't start isochronous transmission\n");
132 goto out_handle_dma;
133 }
134
135 return 0;
136
137 out_handle_dma:
138 dc1394_dma_unlisten(dc1394->handle, &dc1394->camera);
139 dc1394_dma_release_camera(dc1394->handle, &dc1394->camera);
140 out_handle:
141 dc1394_destroy_handle(dc1394->handle);
142 out:
143 return -1;
144 }
145
146 static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt)
147 {
148 struct dc1394_data *dc1394 = c->priv_data;
149 int res;
150
151 /* discard stale frame */
152 if (dc1394->current_frame++) {
153 if (dc1394_dma_done_with_buffer(&dc1394->camera) != DC1394_SUCCESS)
154 av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
155 }
156
157 res = dc1394_dma_single_capture(&dc1394->camera);
158
159 if (res == DC1394_SUCCESS) {
160 dc1394->packet.data = (uint8_t *)(dc1394->camera.capture_buffer);
161 dc1394->packet.pts = (dc1394->current_frame * 1000000) / dc1394->fps;
162 res = dc1394->packet.size;
163 } else {
164 av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
165 dc1394->packet.data = NULL;
166 res = -1;
167 }
168
169 *pkt = dc1394->packet;
170 return res;
171 }
172
173 static int dc1394_close(AVFormatContext * context)
174 {
175 struct dc1394_data *dc1394 = context->priv_data;
176
177 dc1394_stop_iso_transmission(dc1394->handle, dc1394->camera.node);
178 dc1394_dma_unlisten(dc1394->handle, &dc1394->camera);
179 dc1394_dma_release_camera(dc1394->handle, &dc1394->camera);
180 dc1394_destroy_handle(dc1394->handle);
181
182 return 0;
183 }
184
185 AVInputFormat libdc1394_demuxer = {
186 .name = "libdc1394",
187 .long_name = "dc1394 A/V grab",
188 .priv_data_size = sizeof(struct dc1394_data),
189 .read_header = dc1394_read_header,
190 .read_packet = dc1394_read_packet,
191 .read_close = dc1394_close,
192 .flags = AVFMT_NOFILE
193 };