mirror of
https://gitee.com/openharmony/third_party_ffmpeg
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344 lines
12 KiB
C
344 lines
12 KiB
C
/*
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* IIDC1394 grab interface (uses libdc1394 and libraw1394)
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* Copyright (c) 2004 Roman Shaposhnik
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* Copyright (c) 2008 Alessandro Sappia
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* Copyright (c) 2011 Martin Lambers
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "avdevice.h"
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#include <stdlib.h>
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#include <string.h>
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#include <dc1394/dc1394.h>
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#undef free
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typedef struct dc1394_data {
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AVClass *class;
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dc1394_t *d;
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dc1394camera_t *camera;
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dc1394video_frame_t *frame;
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int current_frame;
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int fps;
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AVPacket packet;
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} dc1394_data;
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/* The list of color codings that we support.
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* We assume big endian for the dc1394 16bit modes: libdc1394 never sets the
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* flag little_endian in dc1394video_frame_t. */
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struct dc1394_color_coding {
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int pix_fmt;
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int score;
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uint32_t coding;
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} dc1394_color_codings[] = {
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{ PIX_FMT_GRAY16BE, 1000, DC1394_COLOR_CODING_MONO16 },
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{ PIX_FMT_RGB48BE, 1100, DC1394_COLOR_CODING_RGB16 },
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{ PIX_FMT_GRAY8, 1200, DC1394_COLOR_CODING_MONO8 },
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{ PIX_FMT_RGB24, 1300, DC1394_COLOR_CODING_RGB8 },
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{ PIX_FMT_UYYVYY411, 1400, DC1394_COLOR_CODING_YUV411 },
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{ PIX_FMT_UYVY422, 1500, DC1394_COLOR_CODING_YUV422 },
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{ PIX_FMT_NONE, 0, 0 } /* gotta be the last one */
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};
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struct dc1394_frame_rate {
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int frame_rate;
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int frame_rate_id;
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} dc1394_frame_rates[] = {
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{ 1875, DC1394_FRAMERATE_1_875 },
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{ 3750, DC1394_FRAMERATE_3_75 },
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{ 7500, DC1394_FRAMERATE_7_5 },
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{ 15000, DC1394_FRAMERATE_15 },
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{ 30000, DC1394_FRAMERATE_30 },
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{ 60000, DC1394_FRAMERATE_60 },
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{120000, DC1394_FRAMERATE_120 },
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{240000, DC1394_FRAMERATE_240 },
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{ 0, 0 } /* gotta be the last one */
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};
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static const AVOption options[] = {
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{ NULL },
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};
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static const AVClass libdc1394_class = {
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.class_name = "libdc1394 indev",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static int dc1394_read_header(AVFormatContext *c, AVFormatParameters * ap)
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{
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dc1394_data* dc1394 = c->priv_data;
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AVStream *vst;
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const struct dc1394_color_coding *cc;
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const struct dc1394_frame_rate *fr;
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dc1394camera_list_t *list;
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dc1394video_modes_t video_modes;
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dc1394video_mode_t video_mode;
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dc1394framerates_t frame_rates;
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dc1394framerate_t frame_rate;
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uint32_t dc1394_width, dc1394_height, dc1394_color_coding;
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int rate, best_rate;
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int score, max_score;
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int final_width, final_height, final_pix_fmt, final_frame_rate;
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int res, i, j;
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/* Now let us prep the hardware. */
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dc1394->d = dc1394_new();
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dc1394_camera_enumerate (dc1394->d, &list);
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if ( !list || list->num == 0) {
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av_log(c, AV_LOG_ERROR, "Unable to look for an IIDC camera\n\n");
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goto out;
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}
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/* FIXME: To select a specific camera I need to search in list its guid */
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dc1394->camera = dc1394_camera_new (dc1394->d, list->ids[0].guid);
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if (list->num > 1) {
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av_log(c, AV_LOG_INFO, "Working with the first camera found\n");
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}
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/* Freeing list of cameras */
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dc1394_camera_free_list (list);
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/* Get the list of video modes supported by the camera. */
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res = dc1394_video_get_supported_modes (dc1394->camera, &video_modes);
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if (res != DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Could not get video formats.\n");
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goto out_camera;
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}
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/* Choose the best mode. */
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rate = (ap->time_base.num ? av_rescale(1000, ap->time_base.den, ap->time_base.num) : -1);
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max_score = -1;
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for (i = 0; i < video_modes.num; i++) {
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if (video_modes.modes[i] == DC1394_VIDEO_MODE_EXIF
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|| (video_modes.modes[i] >= DC1394_VIDEO_MODE_FORMAT7_MIN
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&& video_modes.modes[i] <= DC1394_VIDEO_MODE_FORMAT7_MAX)) {
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/* These modes are currently not supported as they would require
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* much more work. For the remaining modes, the functions
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* dc1394_get_image_size_from_video_mode and
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* dc1394_get_color_coding_from_video_mode do not need to query the
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* camera, and thus cannot fail. */
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continue;
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}
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dc1394_get_color_coding_from_video_mode (NULL, video_modes.modes[i],
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&dc1394_color_coding);
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for (cc = dc1394_color_codings; cc->pix_fmt != PIX_FMT_NONE; cc++)
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if (cc->coding == dc1394_color_coding)
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break;
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if (cc->pix_fmt == PIX_FMT_NONE) {
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/* We currently cannot handle this color coding. */
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continue;
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}
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/* Here we know that the mode is supported. Get its frame size and the list
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* of frame rates supported by the camera for this mode. This list is sorted
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* in ascending order according to libdc1394 example programs. */
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dc1394_get_image_size_from_video_mode (NULL, video_modes.modes[i],
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&dc1394_width, &dc1394_height);
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res = dc1394_video_get_supported_framerates (dc1394->camera, video_modes.modes[i],
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&frame_rates);
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if (res != DC1394_SUCCESS || frame_rates.num == 0) {
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av_log(c, AV_LOG_ERROR, "Cannot get frame rates for video mode.\n");
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goto out_camera;
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}
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/* Choose the best frame rate. */
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best_rate = -1;
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for (j = 0; j < frame_rates.num; j++) {
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for (fr = dc1394_frame_rates; fr->frame_rate; fr++) {
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if (fr->frame_rate_id == frame_rates.framerates[j]) {
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break;
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}
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}
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if (!fr->frame_rate) {
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/* This frame rate is not supported. */
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continue;
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}
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best_rate = fr->frame_rate;
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frame_rate = fr->frame_rate_id;
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if (ap->time_base.num && rate == fr->frame_rate) {
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/* This is the requested frame rate. */
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break;
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}
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}
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if (best_rate == -1) {
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/* No supported rate found. */
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continue;
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}
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/* Here we know that both the mode and the rate are supported. Compute score. */
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if (ap->width && ap->height
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&& (dc1394_width == ap->width && dc1394_height == ap->height)) {
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score = 110000;
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} else {
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score = dc1394_width * 10; // 1600 - 16000
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}
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if (ap->pix_fmt == cc->pix_fmt) {
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score += 90000;
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} else {
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score += cc->score; // 1000 - 1500
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}
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if (ap->time_base.num && rate == best_rate) {
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score += 70000;
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} else {
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score += best_rate / 1000; // 1 - 240
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}
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if (score > max_score) {
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video_mode = video_modes.modes[i];
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final_width = dc1394_width;
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final_height = dc1394_height;
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final_pix_fmt = cc->pix_fmt;
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final_frame_rate = best_rate;
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max_score = score;
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}
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}
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if (max_score == -1) {
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av_log(c, AV_LOG_ERROR, "No suitable video mode / frame rate available.\n");
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goto out_camera;
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}
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if (ap->width && ap->height && !(ap->width == final_width && ap->height == final_height)) {
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av_log(c, AV_LOG_WARNING, "Requested frame size is not available, using fallback.\n");
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}
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if (ap->pix_fmt != PIX_FMT_NONE && ap->pix_fmt != final_pix_fmt) {
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av_log(c, AV_LOG_WARNING, "Requested pixel format is not supported, using fallback.\n");
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}
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if (ap->time_base.num && rate != final_frame_rate) {
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av_log(c, AV_LOG_WARNING, "Requested frame rate is not available, using fallback.\n");
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}
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/* create a video stream */
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vst = av_new_stream(c, 0);
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if (!vst)
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goto out_camera;
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av_set_pts_info(vst, 64, 1, 1000);
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vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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vst->codec->codec_id = CODEC_ID_RAWVIDEO;
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vst->codec->time_base.den = final_frame_rate;
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vst->codec->time_base.num = 1000;
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vst->codec->width = final_width;
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vst->codec->height = final_height;
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vst->codec->pix_fmt = final_pix_fmt;
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/* packet init */
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av_init_packet(&dc1394->packet);
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dc1394->packet.size = avpicture_get_size(final_pix_fmt, final_width, final_height);
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dc1394->packet.stream_index = vst->index;
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dc1394->packet.flags |= AV_PKT_FLAG_KEY;
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dc1394->current_frame = 0;
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dc1394->fps = final_frame_rate;
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vst->codec->bit_rate = av_rescale(dc1394->packet.size * 8, final_frame_rate, 1000);
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/* Select MAX Speed possible from the cam */
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if (dc1394->camera->bmode_capable>0) {
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dc1394_video_set_operation_mode(dc1394->camera, DC1394_OPERATION_MODE_1394B);
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i = DC1394_ISO_SPEED_800;
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} else {
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i = DC1394_ISO_SPEED_400;
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}
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for (res = DC1394_FAILURE; i >= DC1394_ISO_SPEED_MIN && res != DC1394_SUCCESS; i--) {
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res=dc1394_video_set_iso_speed(dc1394->camera, i);
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}
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if (res != DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Couldn't set ISO Speed\n");
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goto out_camera;
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}
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if (dc1394_video_set_mode(dc1394->camera, video_mode) != DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Couldn't set video format\n");
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goto out_camera;
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}
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if (dc1394_video_set_framerate(dc1394->camera, frame_rate) != DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Could not set framerate %d.\n", final_frame_rate);
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goto out_camera;
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}
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if (dc1394_capture_setup(dc1394->camera, 10, DC1394_CAPTURE_FLAGS_DEFAULT)!=DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Cannot setup camera \n");
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goto out_camera;
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}
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if (dc1394_video_set_transmission(dc1394->camera, DC1394_ON) !=DC1394_SUCCESS) {
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av_log(c, AV_LOG_ERROR, "Cannot start capture\n");
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goto out_camera;
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}
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return 0;
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out_camera:
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dc1394_capture_stop(dc1394->camera);
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dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
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dc1394_camera_free (dc1394->camera);
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out:
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dc1394_free(dc1394->d);
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return -1;
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}
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static int dc1394_read_packet(AVFormatContext *c, AVPacket *pkt)
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{
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struct dc1394_data *dc1394 = c->priv_data;
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int res;
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/* discard stale frame */
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if (dc1394->current_frame++) {
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if (dc1394_capture_enqueue(dc1394->camera, dc1394->frame) != DC1394_SUCCESS)
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av_log(c, AV_LOG_ERROR, "failed to release %d frame\n", dc1394->current_frame);
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}
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res = dc1394_capture_dequeue(dc1394->camera, DC1394_CAPTURE_POLICY_WAIT, &dc1394->frame);
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if (res == DC1394_SUCCESS) {
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dc1394->packet.data = (uint8_t *)(dc1394->frame->image);
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dc1394->packet.pts = (dc1394->current_frame * 1000000) / (dc1394->fps);
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res = dc1394->frame->image_bytes;
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} else {
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av_log(c, AV_LOG_ERROR, "DMA capture failed\n");
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dc1394->packet.data = NULL;
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res = -1;
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}
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*pkt = dc1394->packet;
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return res;
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}
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static int dc1394_close(AVFormatContext * context)
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{
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struct dc1394_data *dc1394 = context->priv_data;
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dc1394_video_set_transmission(dc1394->camera, DC1394_OFF);
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dc1394_capture_stop(dc1394->camera);
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dc1394_camera_free(dc1394->camera);
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dc1394_free(dc1394->d);
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return 0;
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}
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AVInputFormat ff_libdc1394_demuxer = {
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.name = "libdc1394",
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.long_name = NULL_IF_CONFIG_SMALL("dc1394 A/V grab"),
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.priv_data_size = sizeof(struct dc1394_data),
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.read_header = dc1394_read_header,
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.read_packet = dc1394_read_packet,
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.read_close = dc1394_close,
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.flags = AVFMT_NOFILE,
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.priv_class = &libdc1394_class,
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};
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