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Diffstat (limited to 'libavformat/v4l2.c')
-rw-r--r--libavformat/v4l2.c643
1 files changed, 0 insertions, 643 deletions
diff --git a/libavformat/v4l2.c b/libavformat/v4l2.c
deleted file mode 100644
index d385d57c7c..0000000000
--- a/libavformat/v4l2.c
+++ /dev/null
@@ -1,643 +0,0 @@
-/*
- * Video4Linux2 grab interface
- * Copyright (c) 2000,2001 Fabrice Bellard.
- * Copyright (c) 2006 Luca Abeni.
- *
- * Part of this file is based on the V4L2 video capture example
- * (http://v4l2spec.bytesex.org/v4l2spec/capture.c)
- *
- * Thanks to Michael Niedermayer for providing the mapping between
- * V4L2_PIX_FMT_* and PIX_FMT_*
- *
- *
- * 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 "avformat.h"
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/time.h>
-#include <asm/types.h>
-#include <linux/videodev2.h>
-#include <time.h>
-
-static const int desired_video_buffers = 256;
-
-enum io_method {
- io_read,
- io_mmap,
- io_userptr
-};
-
-struct video_data {
- int fd;
- int frame_format; /* V4L2_PIX_FMT_* */
- enum io_method io_method;
- int width, height;
- int frame_rate;
- int frame_rate_base;
- int frame_size;
- int top_field_first;
-
- int buffers;
- void **buf_start;
- unsigned int *buf_len;
-};
-
-struct buff_data {
- int index;
- int fd;
-};
-
-struct fmt_map {
- enum PixelFormat ff_fmt;
- int32_t v4l2_fmt;
-};
-
-static struct fmt_map fmt_conversion_table[] = {
- {
- .ff_fmt = PIX_FMT_YUV420P,
- .v4l2_fmt = V4L2_PIX_FMT_YUV420,
- },
- {
- .ff_fmt = PIX_FMT_YUV422P,
- .v4l2_fmt = V4L2_PIX_FMT_YUV422P,
- },
- {
- .ff_fmt = PIX_FMT_YUYV422,
- .v4l2_fmt = V4L2_PIX_FMT_YUYV,
- },
- {
- .ff_fmt = PIX_FMT_UYVY422,
- .v4l2_fmt = V4L2_PIX_FMT_UYVY,
- },
- {
- .ff_fmt = PIX_FMT_YUV411P,
- .v4l2_fmt = V4L2_PIX_FMT_YUV411P,
- },
- {
- .ff_fmt = PIX_FMT_YUV410P,
- .v4l2_fmt = V4L2_PIX_FMT_YUV410,
- },
- {
- .ff_fmt = PIX_FMT_BGR24,
- .v4l2_fmt = V4L2_PIX_FMT_BGR24,
- },
- {
- .ff_fmt = PIX_FMT_RGB24,
- .v4l2_fmt = V4L2_PIX_FMT_RGB24,
- },
- /*
- {
- .ff_fmt = PIX_FMT_RGB32,
- .v4l2_fmt = V4L2_PIX_FMT_BGR32,
- },
- */
- {
- .ff_fmt = PIX_FMT_GRAY8,
- .v4l2_fmt = V4L2_PIX_FMT_GREY,
- },
-};
-
-static int device_open(AVFormatContext *ctx, uint32_t *capabilities)
-{
- struct v4l2_capability cap;
- int fd;
- int res;
- int flags = O_RDWR;
-
- if (ctx->flags & AVFMT_FLAG_NONBLOCK) {
- flags |= O_NONBLOCK;
- }
- fd = open(ctx->filename, flags, 0);
- if (fd < 0) {
- av_log(ctx, AV_LOG_ERROR, "Cannot open video device %s : %s\n",
- ctx->filename, strerror(errno));
-
- return -1;
- }
-
- res = ioctl(fd, VIDIOC_QUERYCAP, &cap);
- // ENOIOCTLCMD definition only availble on __KERNEL__
- if (res < 0 && errno == 515)
- {
- av_log(ctx, AV_LOG_ERROR, "QUERYCAP not implemented, probably V4L device but not supporting V4L2\n");
- close(fd);
-
- return -1;
- }
- if (res < 0) {
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
- strerror(errno));
- close(fd);
-
- return -1;
- }
- if ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) {
- av_log(ctx, AV_LOG_ERROR, "Not a video capture device\n");
- close(fd);
-
- return -1;
- }
- *capabilities = cap.capabilities;
-
- return fd;
-}
-
-static int device_init(AVFormatContext *ctx, int *width, int *height, int pix_fmt)
-{
- struct video_data *s = ctx->priv_data;
- int fd = s->fd;
- struct v4l2_format fmt;
- int res;
-
- memset(&fmt, 0, sizeof(struct v4l2_format));
- fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- fmt.fmt.pix.width = *width;
- fmt.fmt.pix.height = *height;
- fmt.fmt.pix.pixelformat = pix_fmt;
- fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
- res = ioctl(fd, VIDIOC_S_FMT, &fmt);
- if ((*width != fmt.fmt.pix.width) || (*height != fmt.fmt.pix.height)) {
- av_log(ctx, AV_LOG_INFO, "The V4L2 driver changed the video from %dx%d to %dx%d\n", *width, *height, fmt.fmt.pix.width, fmt.fmt.pix.height);
- *width = fmt.fmt.pix.width;
- *height = fmt.fmt.pix.height;
- }
-
- return res;
-}
-
-static int first_field(int fd)
-{
- int res;
- v4l2_std_id std;
-
- res = ioctl(fd, VIDIOC_G_STD, &std);
- if (res < 0) {
- return 0;
- }
- if (std & V4L2_STD_NTSC) {
- return 0;
- }
-
- return 1;
-}
-
-static uint32_t fmt_ff2v4l(enum PixelFormat pix_fmt)
-{
- int i;
-
- for (i = 0; i < sizeof(fmt_conversion_table) / sizeof(struct fmt_map); i++) {
- if (fmt_conversion_table[i].ff_fmt == pix_fmt) {
- return fmt_conversion_table[i].v4l2_fmt;
- }
- }
-
- return 0;
-}
-
-static enum PixelFormat fmt_v4l2ff(uint32_t pix_fmt)
-{
- int i;
-
- for (i = 0; i < sizeof(fmt_conversion_table) / sizeof(struct fmt_map); i++) {
- if (fmt_conversion_table[i].v4l2_fmt == pix_fmt) {
- return fmt_conversion_table[i].ff_fmt;
- }
- }
-
- return -1;
-}
-
-static int mmap_init(AVFormatContext *ctx)
-{
- struct video_data *s = ctx->priv_data;
- struct v4l2_requestbuffers req;
- int i, res;
-
- memset(&req, 0, sizeof(struct v4l2_requestbuffers));
- req.count = desired_video_buffers;
- req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- req.memory = V4L2_MEMORY_MMAP;
- res = ioctl (s->fd, VIDIOC_REQBUFS, &req);
- if (res < 0) {
- if (errno == EINVAL) {
- av_log(ctx, AV_LOG_ERROR, "Device does not support mmap\n");
- } else {
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_REQBUFS)\n");
- }
-
- return -1;
- }
-
- if (req.count < 2) {
- av_log(ctx, AV_LOG_ERROR, "Insufficient buffer memory\n");
-
- return -1;
- }
- s->buffers = req.count;
- s->buf_start = av_malloc(sizeof(void *) * s->buffers);
- if (s->buf_start == NULL) {
- av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer pointers\n");
-
- return -1;
- }
- s->buf_len = av_malloc(sizeof(unsigned int) * s->buffers);
- if (s->buf_len == NULL) {
- av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer sizes\n");
- av_free(s->buf_start);
-
- return -1;
- }
-
- for (i = 0; i < req.count; i++) {
- struct v4l2_buffer buf;
-
- memset(&buf, 0, sizeof(struct v4l2_buffer));
- buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- buf.memory = V4L2_MEMORY_MMAP;
- buf.index = i;
- res = ioctl (s->fd, VIDIOC_QUERYBUF, &buf);
- if (res < 0) {
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
-
- return -1;
- }
-
- s->buf_len[i] = buf.length;
- if (s->buf_len[i] < s->frame_size) {
- av_log(ctx, AV_LOG_ERROR, "Buffer len [%d] = %d != %d\n", i, s->buf_len[i], s->frame_size);
-
- return -1;
- }
- s->buf_start[i] = mmap (NULL, buf.length,
- PROT_READ | PROT_WRITE, MAP_SHARED, s->fd, buf.m.offset);
- if (s->buf_start[i] == MAP_FAILED) {
- av_log(ctx, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
-
- return -1;
- }
- }
-
- return 0;
-}
-
-static int read_init(AVFormatContext *ctx)
-{
- return -1;
-}
-
-static void mmap_release_buffer(AVPacket *pkt)
-{
- struct v4l2_buffer buf;
- int res, fd;
- struct buff_data *buf_descriptor = pkt->priv;
-
- memset(&buf, 0, sizeof(struct v4l2_buffer));
- buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- buf.memory = V4L2_MEMORY_MMAP;
- buf.index = buf_descriptor->index;
- fd = buf_descriptor->fd;
- av_free(buf_descriptor);
-
- res = ioctl (fd, VIDIOC_QBUF, &buf);
- if (res < 0) {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF)\n");
- }
- pkt->data = NULL;
- pkt->size = 0;
-}
-
-static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
-{
- struct video_data *s = ctx->priv_data;
- struct v4l2_buffer buf;
- struct buff_data *buf_descriptor;
- int res;
-
- memset(&buf, 0, sizeof(struct v4l2_buffer));
- buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- buf.memory = V4L2_MEMORY_MMAP;
-
- /* FIXME: Some special treatment might be needed in case of loss of signal... */
- while ((res = ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 && (errno == EINTR));
- if (res < 0) {
- if (errno == EAGAIN) {
- pkt->size = 0;
-
- return AVERROR(EAGAIN);
- }
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n", strerror(errno));
-
- return -1;
- }
- assert (buf.index < s->buffers);
- if (buf.bytesused != s->frame_size) {
- av_log(ctx, AV_LOG_ERROR, "The v4l2 frame is %d bytes, but %d bytes are expected\n", buf.bytesused, s->frame_size);
-
- return -1;
- }
-
- /* Image is at s->buff_start[buf.index] */
- pkt->data= s->buf_start[buf.index];
- pkt->size = buf.bytesused;
- pkt->pts = buf.timestamp.tv_sec * INT64_C(1000000) + buf.timestamp.tv_usec;
- pkt->destruct = mmap_release_buffer;
- buf_descriptor = av_malloc(sizeof(struct buff_data));
- if (buf_descriptor == NULL) {
- /* Something went wrong... Since av_malloc() failed, we cannot even
- * allocate a buffer for memcopying into it
- */
- av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n");
- res = ioctl (s->fd, VIDIOC_QBUF, &buf);
-
- return -1;
- }
- buf_descriptor->fd = s->fd;
- buf_descriptor->index = buf.index;
- pkt->priv = buf_descriptor;
-
- return s->buf_len[buf.index];
-}
-
-static int read_frame(AVFormatContext *ctx, AVPacket *pkt)
-{
- return -1;
-}
-
-static int mmap_start(AVFormatContext *ctx)
-{
- struct video_data *s = ctx->priv_data;
- enum v4l2_buf_type type;
- int i, res;
-
- for (i = 0; i < s->buffers; i++) {
- struct v4l2_buffer buf;
-
- memset(&buf, 0, sizeof(struct v4l2_buffer));
- buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- buf.memory = V4L2_MEMORY_MMAP;
- buf.index = i;
-
- res = ioctl (s->fd, VIDIOC_QBUF, &buf);
- if (res < 0) {
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno));
-
- return -1;
- }
- }
-
- type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- res = ioctl (s->fd, VIDIOC_STREAMON, &type);
- if (res < 0) {
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n", strerror(errno));
-
- return -1;
- }
-
- return 0;
-}
-
-static void mmap_close(struct video_data *s)
-{
- enum v4l2_buf_type type;
- int i;
-
- type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- /* We do not check for the result, because we could
- * not do anything about it anyway...
- */
- ioctl(s->fd, VIDIOC_STREAMOFF, &type);
- for (i = 0; i < s->buffers; i++) {
- munmap(s->buf_start[i], s->buf_len[i]);
- }
- av_free(s->buf_start);
- av_free(s->buf_len);
-}
-
-static int v4l2_set_parameters( AVFormatContext *s1, AVFormatParameters *ap )
-{
- struct video_data *s = s1->priv_data;
- struct v4l2_input input;
- struct v4l2_standard standard;
- int i;
-
- if(ap->channel>=0) {
- /* set tv video input */
- memset (&input, 0, sizeof (input));
- input.index = ap->channel;
- if(ioctl (s->fd, VIDIOC_ENUMINPUT, &input) < 0) {
- av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl enum input failed:\n");
- return AVERROR(EIO);
- }
-
- av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set input_id: %d, input: %s\n",
- ap->channel, input.name);
- if(ioctl (s->fd, VIDIOC_S_INPUT, &input.index) < 0 ) {
- av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set input(%d) failed\n",
- ap->channel);
- return AVERROR(EIO);
- }
- }
-
- if(ap->standard) {
- av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s\n",
- ap->standard );
- /* set tv standard */
- memset (&standard, 0, sizeof (standard));
- for(i=0;;i++) {
- standard.index = i;
- if (ioctl(s->fd, VIDIOC_ENUMSTD, &standard) < 0) {
- av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set standard(%s) failed\n",
- ap->standard);
- return AVERROR(EIO);
- }
-
- if(!strcasecmp(standard.name, ap->standard)) {
- break;
- }
- }
-
- av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s, id: %"PRIu64"\n",
- ap->standard, standard.id);
- if (ioctl(s->fd, VIDIOC_S_STD, &standard.id) < 0) {
- av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set standard(%s) failed\n",
- ap->standard);
- return AVERROR(EIO);
- }
- }
-
- return 0;
-}
-
-static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
-{
- struct video_data *s = s1->priv_data;
- AVStream *st;
- int width, height;
- int res, frame_rate, frame_rate_base;
- uint32_t desired_format, capabilities;
-
- if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) {
- av_log(s1, AV_LOG_ERROR, "Missing/Wrong parameters\n");
-
- return -1;
- }
-
- width = ap->width;
- height = ap->height;
- frame_rate = ap->time_base.den;
- frame_rate_base = ap->time_base.num;
-
- if((unsigned)width > 32767 || (unsigned)height > 32767) {
- av_log(s1, AV_LOG_ERROR, "Wrong size %dx%d\n", width, height);
-
- return -1;
- }
-
- st = av_new_stream(s1, 0);
- if (!st) {
- return AVERROR(ENOMEM);
- }
- av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
-
- s->width = width;
- s->height = height;
- s->frame_rate = frame_rate;
- s->frame_rate_base = frame_rate_base;
-
- capabilities = 0;
- s->fd = device_open(s1, &capabilities);
- if (s->fd < 0) {
- av_free(st);
-
- return AVERROR(EIO);
- }
- av_log(s1, AV_LOG_INFO, "[%d]Capabilities: %x\n", s->fd, capabilities);
-
- desired_format = fmt_ff2v4l(ap->pix_fmt);
- if (desired_format == 0 || (device_init(s1, &width, &height, desired_format) < 0)) {
- int i, done;
-
- done = 0; i = 0;
- while (!done) {
- desired_format = fmt_conversion_table[i].v4l2_fmt;
- if (device_init(s1, &width, &height, desired_format) < 0) {
- desired_format = 0;
- i++;
- } else {
- done = 1;
- }
- if (i == sizeof(fmt_conversion_table) / sizeof(struct fmt_map)) {
- done = 1;
- }
- }
- }
- if (desired_format == 0) {
- av_log(s1, AV_LOG_ERROR, "Cannot find a proper format.\n");
- close(s->fd);
- av_free(st);
-
- return AVERROR(EIO);
- }
- s->frame_format = desired_format;
-
- if( v4l2_set_parameters( s1, ap ) < 0 )
- return AVERROR(EIO);
-
- st->codec->pix_fmt = fmt_v4l2ff(desired_format);
- s->frame_size = avpicture_get_size(st->codec->pix_fmt, width, height);
- if (capabilities & V4L2_CAP_STREAMING) {
- s->io_method = io_mmap;
- res = mmap_init(s1);
- if (res == 0) {
- res = mmap_start(s1);
- }
- } else {
- s->io_method = io_read;
- res = read_init(s1);
- }
- if (res < 0) {
- close(s->fd);
- av_free(st);
-
- return AVERROR(EIO);
- }
- s->top_field_first = first_field(s->fd);
-
- st->codec->codec_type = CODEC_TYPE_VIDEO;
- st->codec->codec_id = CODEC_ID_RAWVIDEO;
- st->codec->width = width;
- st->codec->height = height;
- st->codec->time_base.den = frame_rate;
- st->codec->time_base.num = frame_rate_base;
- st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8;
-
- return 0;
-}
-
-static int v4l2_read_packet(AVFormatContext *s1, AVPacket *pkt)
-{
- struct video_data *s = s1->priv_data;
- int res;
-
- if (s->io_method == io_mmap) {
- av_init_packet(pkt);
- res = mmap_read_frame(s1, pkt);
- } else if (s->io_method == io_read) {
- if (av_new_packet(pkt, s->frame_size) < 0)
- return AVERROR(EIO);
-
- res = read_frame(s1, pkt);
- } else {
- return AVERROR(EIO);
- }
- if (res < 0) {
- return res;
- }
-
- if (s1->streams[0]->codec->coded_frame) {
- s1->streams[0]->codec->coded_frame->interlaced_frame = 1;
- s1->streams[0]->codec->coded_frame->top_field_first = s->top_field_first;
- }
-
- return s->frame_size;
-}
-
-static int v4l2_read_close(AVFormatContext *s1)
-{
- struct video_data *s = s1->priv_data;
-
- if (s->io_method == io_mmap) {
- mmap_close(s);
- }
-
- close(s->fd);
- return 0;
-}
-
-AVInputFormat v4l2_demuxer = {
- "video4linux2",
- "video grab",
- sizeof(struct video_data),
- NULL,
- v4l2_read_header,
- v4l2_read_packet,
- v4l2_read_close,
- .flags = AVFMT_NOFILE,
-};
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