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ffmpeg/libavdevice/libdc1394.c

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/*
* IIDC1394 grab interface (uses libdc1394 and libraw1394)
* Copyright (c) 2004 Roman Shaposhnik
* Copyright (c) 2008 Alessandro Sappia
* Copyright (c) 2011 Martin Lambers
*
* 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 "config.h"
#include "libavutil/log.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "avdevice.h"
#include <stdlib.h>
#include <string.h>
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include <dc1394/dc1394.h>
#undef free
typedef struct dc1394_data {
AVClass *class;
dc1394_t *d;
dc1394camera_t *camera;
dc1394video_frame_t *frame;
int current_frame;
int frame_rate; /**< frames per 1000 seconds (fps * 1000) */
char *video_size; /**< String describing video size, set by a private option. */
char *pixel_format; /**< Set by a private option. */
char *framerate; /**< Set by a private option. */
AVPacket packet;
} dc1394_data;
/* The list of color codings that we support.
* We assume big endian for the dc1394 16bit modes: libdc1394 never sets the
* flag little_endian in dc1394video_frame_t. */
struct dc1394_color_coding {
int pix_fmt;
int score;
uint32_t coding;
} dc1394_color_codings[] = {
{ PIX_FMT_GRAY16BE, 1000, DC1394_COLOR_CODING_MONO16 },
{ PIX_FMT_RGB48BE, 1100, DC1394_COLOR_CODING_RGB16 },
{ PIX_FMT_GRAY8, 1200, DC1394_COLOR_CODING_MONO8 },
{ PIX_FMT_RGB24, 1300, DC1394_COLOR_CODING_RGB8 },
{ PIX_FMT_UYYVYY411, 1400, DC1394_COLOR_CODING_YUV411 },
{ PIX_FMT_UYVY422, 1500, DC1394_COLOR_CODING_YUV422 },
{ PIX_FMT_NONE, 0, 0 } /* gotta be the last one */
};
struct dc1394_frame_rate {
int frame_rate;
int frame_rate_id;
} dc1394_frame_rates[] = {
{ 1875, DC1394_FRAMERATE_1_875 },
{ 3750, DC1394_FRAMERATE_3_75 },
{ 7500, DC1394_FRAMERATE_7_5 },
{ 15000, DC1394_FRAMERATE_15 },
{ 30000, DC1394_FRAMERATE_30 },
{ 60000, DC1394_FRAMERATE_60 },
{120000, DC1394_FRAMERATE_120 },
{240000, DC1394_FRAMERATE_240 },
{ 0, 0 } /* gotta be the last one */
};
#define OFFSET(x) offsetof(dc1394_data, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "qvga"}, 0, 0, DEC },
{ "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "uyvy422"}, 0, 0, DEC },
{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
{ NULL },
};
static const AVClass libdc1394_class = {
.class_name = "libdc1394 indev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
{
dc1394_data* dc1394 = c->priv_data;
AVStream *vst;
const struct dc1394_color_coding *cc;
const struct dc1394_frame_rate *fr;
dc1394camera_list_t *list;
dc1394video_modes_t video_modes;
dc1394video_mode_t video_mode;
dc1394framerates_t frame_rates;
dc1394framerate_t frame_rate;
uint32_t dc1394_width, dc1394_height, dc1394_color_coding;
int rate, best_rate;
int score, max_score;
int final_width, final_height, final_pix_fmt, final_frame_rate;
int res, i, j;
int ret=-1;
/* Now let us prep the hardware. */
dc1394->d = dc1394_new();
dc1394_camera_enumerate (dc1394->d, &list);
if ( !list || list->num == 0) {
av_log(c, AV_LOG_ERROR, "Unable to look for an IIDC camera\n\n");
goto out;
}
/* FIXME: To select a specific camera I need to search in list its guid */
dc1394->camera = dc1394_camera_new (dc1394->d, list->ids[0].guid);
if (list->num > 1) {
av_log(c, AV_LOG_INFO, "Working with the first camera found\n");
}
/* Freeing list of cameras */
dc1394_camera_free_list (list);
/* Get the list of video modes supported by the camera. */
res = dc1394_video_get_supported_modes (dc1394->camera, &video_modes);
if (res != DC1394_SUCCESS) {
av_log(c, AV_LOG_ERROR, "Could not get video formats.\n");
goto out_camera;
}
if (dc1394->pixel_format) {
if ((ap->pix_fmt = av_get_pix_fmt(dc1394->pixel_format)) == PIX_FMT_NONE) {
av_log(c, AV_LOG_ERROR, "No such pixel format: %s.\n", dc1394->pixel_format);
ret = AVERROR(EINVAL);
goto out;
}
}
if (dc1394->video_size) {
if ((ret = av_parse_video_size(&ap->width, &ap->height, dc1394->video_size)) < 0) {
av_log(c, AV_LOG_ERROR, "Couldn't parse video size.\n");
goto out;
}
}
/* Choose the best mode. */
rate = (ap->time_base.num ? av_rescale(1000, ap->time_base.den, ap->time_base.num) : -1);
max_score = -1;
for (i = 0; i < video_modes.num; i++) {
if (video_modes.modes[i] == DC1394_VIDEO_MODE_EXIF
|| (video_modes.modes[i] >= DC1394_VIDEO_MODE_FORMAT7_MIN
&& video_modes.modes[i] <= DC1394_VIDEO_MODE_FORMAT7_MAX)) {
/* These modes are currently not supported as they would require
* much more work. For the remaining modes, the functions
* dc1394_get_image_size_from_video_mode and
* dc1394_get_color_coding_from_video_mode do not need to query the
* camera, and thus cannot fail. */
continue;
}
dc1394_get_color_coding_from_video_mode (NULL, video_modes.modes[i],
&dc1394_color_coding);
for (cc = dc1394_color_codings; cc->pix_fmt != PIX_FMT_NONE; cc++)
if (cc->coding == dc1394_color_coding)
break;
if (cc->pix_fmt == PIX_FMT_NONE) {
/* We currently cannot handle this color coding. */
continue;
}
/* Here we know that the mode is supported. Get its frame size and the list
* of frame rates supported by the camera for this mode. This list is sorted
* in ascending order according to libdc1394 example programs. */
dc1394_get_image_size_from_video_mode (NULL, video_modes.modes[i],
&dc1394_width, &dc1394_height);
res = dc1394_video_get_supported_framerates (dc1394->camera, video_modes.modes[i],
&frame_rates);
if (res != DC1394_SUCCESS || frame_rates.num == 0) {
av_log(c, AV_LOG_ERROR, "Cannot get frame rates for video mode.\n");
goto out_camera;
}
/* Choose the best frame rate. */
best_rate = -1;
for (j = 0; j < frame_rates.num; j++) {
for (fr = dc1394_frame_rates; fr->frame_rate; fr++) {
if (fr->frame_rate_id == frame_rates.framerates[j]) {
break;
}
}
if (!fr->frame_rate) {
/* This frame rate is not supported. */
continue;
}
best_rate = fr->frame_rate;
frame_rate = fr->frame_rate_id;
if (ap->time_base.num && rate == fr->frame_rate) {
/* This is the requested frame rate. */
break;
}
}
if (best_rate == -1) {
/* No supported rate found. */
continue;
}
/* Here we know that both the mode and the rate are supported. Compute score. */
if (ap->width && ap->height
&& (dc1394_width == ap->width && dc1394_height == ap->height)) {
score = 110000;
} else {
score = dc1394_width * 10; // 1600 - 16000
}
if (ap->pix_fmt == cc->pix_fmt) {
score += 90000;
} else {
score += cc->score; // 1000 - 1500
}
if (ap->time_base.num && rate == best_rate) {
score += 70000;
} else {
score += best_rate / 1000; // 1 - 240
}
if (score > max_score) {
video_mode = video_modes.modes[i];
final_width = dc1394_width;
final_height = dc1394_height;
final_pix_fmt = cc->pix_fmt;
final_frame_rate = best_rate;
max_score = score;
}
}
if (max_score == -1) {
av_log(c, AV_LOG_ERROR, "No suitable video mode / frame rate available.\n");
goto out_camera;
}
if (ap->width && ap->height && !(ap->width == final_width && ap->height == final_height)) {
av_log(c, AV_LOG_WARNING, "Requested frame size is not available, using fallback.\n");
}
if (ap->pix_fmt != PIX_FMT_NONE && ap->pix_fmt != final_pix_fmt) {
av_log(c, AV_LOG_WARNING, "Requested pixel format is not supported, using fallback.\n");
}
if (ap->time_base.num && rate != final_frame_rate) {
av_log(c, AV_LOG_WARNING, "Requested frame rate is not available, using fallback.\n");
}
/* create a video stream */
vst = avformat_new_stream(c, NULL);
if (!vst)
goto out_camera;
av_set_pts_info(vst, 64, 1, 1000);
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_id = CODEC_ID_RAWVIDEO;
vst->codec->time_base.den = final_frame_rate;
vst->codec->time_base.num = 1000;
vst->codec->width = final_width;
vst->codec->height = final_height;
vst->codec->pix_fmt = final_pix_fmt;
/* packet init */
av_init_packet(&dc1394->packet);
dc1394->packet.size = avpicture_get_size(final_pix_fmt, final_width, final_height);
dc1394->packet.stream_index = vst->index;
dc1394->packet.flags |= AV_PKT_FLAG_KEY;
dc1394->current_frame = 0;
dc1394->frame_rate = final_frame_rate;
vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, final_frame_rate, 1000);
/* Select MAX Speed possible from the cam */
if (dc1394->camera->bmode_capable>0) {
dc1394_video_set_operation_mode(dc1394->camera, DC1394_OPERATION_MODE_1394B);
i = DC1394_ISO_SPEED_800;
} else {
i = DC1394_ISO_SPEED_400;
}
for (res = DC1394_FAILURE; i >= DC1394_ISO_SPEED_MIN && res != DC1394_SUCCESS; i--) {
res=dc1394_video_set_iso_speed(dc1394->camera, i);
}
if (res != DC1394_SUCCESS) {
av_log(c, AV_LOG_ERROR, "Couldn't set ISO Speed\n");
goto out_camera;
}
if (dc1394_video_set_mode(dc1394->camera, video_mode) != DC1394_SUCCESS) {
av_log(c, AV_LOG_ERROR, "Couldn't set video format\n");
goto out_camera;
}
if (dc1394_video_set_framerate(dc1394->camera, frame_rate) != DC1394_SUCCESS) {
av_log(c, AV_LOG_ERROR, "Could not set framerate %d.\n", final_frame_rate);
goto out_camera;
}
if (dc1394_capture_setup(dc1394->camera, 10, DC1394_CAPTURE_FLAGS_DEFAULT)!=DC1394_SUCCESS) {
av_log(c, AV_LOG_ERROR, "Cannot setup camera \n");
goto out_camera;
}
if (dc1394_video_set_transmission(dc1394->camera, DC1394_ON) !=DC1394_SUCCESS) {
av_log(c, AV_LOG_ERROR, "Cannot start capture\n");
goto out_camera;
}
return 0;
out_camera:
dc1394_capture_stop(dc1394->camera);
dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
dc1394_camera_free (dc1394->camera);
out:
dc1394_free(dc1394->d);
return ret;
}
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_capture_enqueue(dc1394->camera, dc1394->frame) != DC1394_SUCCESS)
av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
}
res = dc1394_capture_dequeue(dc1394->camera, DC1394_CAPTURE_POLICY_WAIT, &dc1394->frame);
if (res == DC1394_SUCCESS) {
dc1394->packet.data = (uint8_t *)(dc1394->frame->image);
dc1394->packet.pts = (dc1394->current_frame * 1000000) / (dc1394->frame_rate);
res = dc1394->frame->image_bytes;
} 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_video_set_transmission(dc1394->camera, DC1394_OFF);
dc1394_capture_stop(dc1394->camera);
dc1394_camera_free(dc1394->camera);
dc1394_free(dc1394->d);
return 0;
}
AVInputFormat ff_libdc1394_demuxer = {
.name = "libdc1394",
.long_name = NULL_IF_CONFIG_SMALL("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,
.priv_class = &libdc1394_class,
};
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