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libdc1394: choose best video mode and rate based on camera capabilities.

tags/n0.8
Martin Lambers Michael Niedermayer 14 years ago
parent
ea7e318fb2
commit
b8773e44d5
1 changed files with 162 additions and 80 deletions
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  1. +162
    -80
      libavdevice/libdc1394.c

+ 162
- 80
libavdevice/libdc1394.c View File

@@ -2,6 +2,7 @@
* 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.
*
@@ -25,6 +26,9 @@
#include "libavutil/opt.h"
#include "avdevice.h"

#include <stdlib.h>
#include <string.h>

#include <dc1394/dc1394.h>

#undef free
@@ -40,16 +44,21 @@ typedef struct dc1394_data {
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, DC1394_VIDEO_MODE_320x240_YUV422 },
{ 640, 480, PIX_FMT_UYYVYY411, DC1394_VIDEO_MODE_640x480_YUV411 },
{ 640, 480, PIX_FMT_UYVY422, DC1394_VIDEO_MODE_640x480_YUV422 },
{ 0, 0, 0, 0 } /* gotta be the last one */
/* 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 {
@@ -68,9 +77,6 @@ struct dc1394_frame_rate {
};

static const AVOption options[] = {
#if HAVE_LIBDC1394_1
{ "channel", "", offsetof(dc1394_data, channel), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
#endif
{ NULL },
};

@@ -81,73 +87,22 @@ static const AVClass libdc1394_class = {
.version = LIBAVUTIL_VERSION_INT,
};


static inline int dc1394_read_common(AVFormatContext *c, AVFormatParameters *ap,
struct dc1394_frame_format **select_fmt, struct dc1394_frame_rate **select_fps)
{
dc1394_data* dc1394 = c->priv_data;
AVStream* vst;
struct dc1394_frame_format *fmt;
struct dc1394_frame_rate *fps;
enum PixelFormat pix_fmt = ap->pix_fmt == PIX_FMT_NONE ? PIX_FMT_UYVY422 : ap->pix_fmt; /* defaults */
int width = !ap->width ? 320 : ap->width;
int height = !ap->height ? 240 : ap->height;
int frame_rate = !ap->time_base.num ? 30000 : av_rescale(1000, ap->time_base.den, ap->time_base.num);

for (fmt = dc1394_frame_formats; fmt->width; fmt++)
if (fmt->pix_fmt == pix_fmt && fmt->width == width && fmt->height == height)
break;

for (fps = dc1394_frame_rates; fps->frame_rate; fps++)
if (fps->frame_rate == frame_rate)
break;

if (!fps->frame_rate || !fmt->width) {
av_log(c, AV_LOG_ERROR, "Can't find matching camera format for %s, %dx%d@%d:1000fps\n", avcodec_get_pix_fmt_name(pix_fmt),
width, height, frame_rate);
goto out;
}

/* create a video stream */
vst = av_new_stream(c, 0);
if (!vst)
goto out;
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 = 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 |= AV_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);
*select_fps = fps;
*select_fmt = fmt;
return 0;
out:
return -1;
}

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;
int res, i;
struct dc1394_frame_format *fmt = NULL;
struct dc1394_frame_rate *fps = NULL;

if (dc1394_read_common(c,ap,&fmt,&fps) != 0)
return -1;
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;

/* Now let us prep the hardware. */
dc1394->d = dc1394_new();
@@ -166,6 +121,133 @@ static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
/* 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;
}
/* 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 = av_new_stream(c, 0);
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->fps = 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);
@@ -182,13 +264,13 @@ static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
goto out_camera;
}

if (dc1394_video_set_mode(dc1394->camera, fmt->frame_size_id) != DC1394_SUCCESS) {
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,fps->frame_rate_id) != DC1394_SUCCESS) {
av_log(c, AV_LOG_ERROR, "Couldn't set framerate %d \n",fps->frame_rate);
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) {
@@ -256,6 +338,6 @@ AVInputFormat ff_libdc1394_demuxer = {
.read_header = dc1394_read_header,
.read_packet = dc1394_read_packet,
.read_close = dc1394_close,
.flags = AVFMT_NOFILE
.flags = AVFMT_NOFILE,
.priv_class = &libdc1394_class,
};

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