X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavdevice%2Fv4l2.c;h=adb289d14085267bbbc6e961368ed019d233385f;hb=d6a27f885b5d4cba7a82e50af423c741d2f37c3e;hp=072be48d407def9738ce4e909bd068fc606aea27;hpb=41b68dce4d148b6a227d001b32deb275c01aa550;p=ffmpeg diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c index 072be48d407..adb289d1408 100644 --- a/libavdevice/v4l2.c +++ b/libavdevice/v4l2.c @@ -7,7 +7,7 @@ * (http://v4l2spec.bytesex.org/v4l2spec/capture.c) * * Thanks to Michael Niedermayer for providing the mapping between - * V4L2_PIX_FMT_* and PIX_FMT_* + * V4L2_PIX_FMT_* and AV_PIX_FMT_* * * * This file is part of Libav. @@ -30,83 +30,90 @@ #undef __STRICT_ANSI__ //workaround due to broken kernel headers #include "config.h" #include "libavformat/avformat.h" +#include "libavformat/internal.h" #include #include #include #include #include +#include #if HAVE_SYS_VIDEOIO_H #include #else -#include #include #endif -#include -#include +#include "libavutil/atomic.h" +#include "libavutil/avassert.h" #include "libavutil/imgutils.h" +#include "libavutil/internal.h" #include "libavutil/log.h" #include "libavutil/opt.h" #include "libavutil/parseutils.h" #include "libavutil/pixdesc.h" +#include "libavutil/avstring.h" +#include "libavutil/mathematics.h" static const int desired_video_buffers = 256; -enum io_method { - io_read, - io_mmap, - io_userptr -}; +#define V4L_ALLFORMATS 3 +#define V4L_RAWFORMATS 1 +#define V4L_COMPFORMATS 2 struct video_data { AVClass *class; int fd; int frame_format; /* V4L2_PIX_FMT_* */ - enum io_method io_method; int width, height; int frame_size; + int timeout; + int interlaced; int top_field_first; int buffers; + volatile int buffers_queued; void **buf_start; unsigned int *buf_len; char *standard; int channel; - char *video_size; /**< String describing video size, set by a private option. */ + char *video_size; /**< String describing video size, + set by a private option. */ char *pixel_format; /**< Set by a private option. */ + int list_format; /**< Set by a private option. */ char *framerate; /**< Set by a private option. */ }; struct buff_data { + struct video_data *s; int index; int fd; }; struct fmt_map { - enum PixelFormat ff_fmt; - enum CodecID codec_id; + enum AVPixelFormat ff_fmt; + enum AVCodecID codec_id; uint32_t v4l2_fmt; }; static struct fmt_map fmt_conversion_table[] = { //ff_fmt codec_id v4l2_fmt - { PIX_FMT_YUV420P, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV420 }, - { PIX_FMT_YUV422P, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV422P }, - { PIX_FMT_YUYV422, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUYV }, - { PIX_FMT_UYVY422, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_UYVY }, - { PIX_FMT_YUV411P, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV411P }, - { PIX_FMT_YUV410P, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV410 }, - { PIX_FMT_RGB555, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555 }, - { PIX_FMT_RGB565, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565 }, - { PIX_FMT_BGR24, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR24 }, - { PIX_FMT_RGB24, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB24 }, - { PIX_FMT_BGRA, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR32 }, - { PIX_FMT_GRAY8, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_GREY }, - { PIX_FMT_NV12, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_NV12 }, - { PIX_FMT_NONE, CODEC_ID_MJPEG, V4L2_PIX_FMT_MJPEG }, - { PIX_FMT_NONE, CODEC_ID_MJPEG, V4L2_PIX_FMT_JPEG }, + { AV_PIX_FMT_YUV420P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV420 }, + { AV_PIX_FMT_YUV422P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV422P }, + { AV_PIX_FMT_YUYV422, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUYV }, + { AV_PIX_FMT_UYVY422, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_UYVY }, + { AV_PIX_FMT_YUV411P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV411P }, + { AV_PIX_FMT_YUV410P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV410 }, + { AV_PIX_FMT_RGB555, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555 }, + { AV_PIX_FMT_RGB565, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565 }, + { AV_PIX_FMT_BGR24, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR24 }, + { AV_PIX_FMT_RGB24, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB24 }, + { AV_PIX_FMT_BGRA, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR32 }, + { AV_PIX_FMT_GRAY8, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_GREY }, + { AV_PIX_FMT_NV12, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_NV12 }, + { AV_PIX_FMT_NONE, AV_CODEC_ID_MJPEG, V4L2_PIX_FMT_MJPEG }, + { AV_PIX_FMT_NONE, AV_CODEC_ID_MJPEG, V4L2_PIX_FMT_JPEG }, }; -static int device_open(AVFormatContext *ctx, uint32_t *capabilities) +static int device_open(AVFormatContext *ctx) { struct v4l2_capability cap; int fd; @@ -116,65 +123,89 @@ static int device_open(AVFormatContext *ctx, uint32_t *capabilities) if (ctx->flags & AVFMT_FLAG_NONBLOCK) { flags |= O_NONBLOCK; } - fd = open(ctx->filename, flags, 0); + + fd = avpriv_open(ctx->filename, flags); if (fd < 0) { + err = errno; + av_log(ctx, AV_LOG_ERROR, "Cannot open video device %s : %s\n", - ctx->filename, strerror(errno)); + ctx->filename, strerror(err)); - return AVERROR(errno); + return AVERROR(err); } res = ioctl(fd, VIDIOC_QUERYCAP, &cap); - // ENOIOCTLCMD definition only availble on __KERNEL__ - if (res < 0 && ((err = errno) == 515)) { - av_log(ctx, AV_LOG_ERROR, "QUERYCAP not implemented, probably V4L device but not supporting V4L2\n"); - close(fd); - - return AVERROR(515); - } if (res < 0) { + err = errno; av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n", - strerror(errno)); - close(fd); + strerror(err)); - return AVERROR(err); + goto fail; } - if ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) { - av_log(ctx, AV_LOG_ERROR, "Not a video capture device\n"); - close(fd); - return AVERROR(ENODEV); + av_log(ctx, AV_LOG_VERBOSE, "[%d]Capabilities: %x\n", + fd, cap.capabilities); + + if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) { + av_log(ctx, AV_LOG_ERROR, "Not a video capture device.\n"); + err = ENODEV; + + goto fail; + } + + if (!(cap.capabilities & V4L2_CAP_STREAMING)) { + av_log(ctx, AV_LOG_ERROR, + "The device does not support the streaming I/O method.\n"); + err = ENOSYS; + + goto fail; } - *capabilities = cap.capabilities; return fd; + +fail: + close(fd); + return AVERROR(err); } -static int device_init(AVFormatContext *ctx, int *width, int *height, uint32_t pix_fmt) +static int device_init(AVFormatContext *ctx, int *width, int *height, + uint32_t pix_fmt) { struct video_data *s = ctx->priv_data; int fd = s->fd; - struct v4l2_format fmt; + struct v4l2_format fmt = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE }; + struct v4l2_pix_format *pix = &fmt.fmt.pix; + 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; + pix->width = *width; + pix->height = *height; + pix->pixelformat = pix_fmt; + pix->field = V4L2_FIELD_ANY; + 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); + 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; } if (pix_fmt != fmt.fmt.pix.pixelformat) { - av_log(ctx, AV_LOG_DEBUG, "The V4L2 driver changed the pixel format from 0x%08X to 0x%08X\n", pix_fmt, fmt.fmt.pix.pixelformat); + av_log(ctx, AV_LOG_DEBUG, + "The V4L2 driver changed the pixel format " + "from 0x%08X to 0x%08X\n", + pix_fmt, fmt.fmt.pix.pixelformat); res = -1; } + if (fmt.fmt.pix.field == V4L2_FIELD_INTERLACED) { + av_log(ctx, AV_LOG_DEBUG, "The V4L2 driver using the interlaced mode"); + s->interlaced = 1; + } + return res; } @@ -194,14 +225,14 @@ static int first_field(int fd) return 1; } -static uint32_t fmt_ff2v4l(enum PixelFormat pix_fmt, enum CodecID codec_id) +static uint32_t fmt_ff2v4l(enum AVPixelFormat pix_fmt, enum AVCodecID codec_id) { int i; for (i = 0; i < FF_ARRAY_ELEMS(fmt_conversion_table); i++) { - if ((codec_id == CODEC_ID_NONE || + if ((codec_id == AV_CODEC_ID_NONE || fmt_conversion_table[i].codec_id == codec_id) && - (pix_fmt == PIX_FMT_NONE || + (pix_fmt == AV_PIX_FMT_NONE || fmt_conversion_table[i].ff_fmt == pix_fmt)) { return fmt_conversion_table[i].v4l2_fmt; } @@ -210,7 +241,7 @@ static uint32_t fmt_ff2v4l(enum PixelFormat pix_fmt, enum CodecID codec_id) return 0; } -static enum PixelFormat fmt_v4l2ff(uint32_t v4l2_fmt, enum CodecID codec_id) +static enum AVPixelFormat fmt_v4l2ff(uint32_t v4l2_fmt, enum AVCodecID codec_id) { int i; @@ -221,10 +252,10 @@ static enum PixelFormat fmt_v4l2ff(uint32_t v4l2_fmt, enum CodecID codec_id) } } - return PIX_FMT_NONE; + return AV_PIX_FMT_NONE; } -static enum CodecID fmt_v4l2codec(uint32_t v4l2_fmt) +static enum AVCodecID fmt_v4l2codec(uint32_t v4l2_fmt) { int i; @@ -234,19 +265,84 @@ static enum CodecID fmt_v4l2codec(uint32_t v4l2_fmt) } } - return CODEC_ID_NONE; + return AV_CODEC_ID_NONE; +} + +#if HAVE_STRUCT_V4L2_FRMIVALENUM_DISCRETE +static void list_framesizes(AVFormatContext *ctx, int fd, uint32_t pixelformat) +{ + struct v4l2_frmsizeenum vfse = { .pixel_format = pixelformat }; + + while(!ioctl(fd, VIDIOC_ENUM_FRAMESIZES, &vfse)) { + switch (vfse.type) { + case V4L2_FRMSIZE_TYPE_DISCRETE: + av_log(ctx, AV_LOG_INFO, " %ux%u", + vfse.discrete.width, vfse.discrete.height); + break; + case V4L2_FRMSIZE_TYPE_CONTINUOUS: + case V4L2_FRMSIZE_TYPE_STEPWISE: + av_log(ctx, AV_LOG_INFO, " {%u-%u, %u}x{%u-%u, %u}", + vfse.stepwise.min_width, + vfse.stepwise.max_width, + vfse.stepwise.step_width, + vfse.stepwise.min_height, + vfse.stepwise.max_height, + vfse.stepwise.step_height); + } + vfse.index++; + } +} +#endif + +static void list_formats(AVFormatContext *ctx, int fd, int type) +{ + struct v4l2_fmtdesc vfd = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE }; + + while(!ioctl(fd, VIDIOC_ENUM_FMT, &vfd)) { + enum AVCodecID codec_id = fmt_v4l2codec(vfd.pixelformat); + enum AVPixelFormat pix_fmt = fmt_v4l2ff(vfd.pixelformat, codec_id); + + vfd.index++; + + if (!(vfd.flags & V4L2_FMT_FLAG_COMPRESSED) && + type & V4L_RAWFORMATS) { + const char *fmt_name = av_get_pix_fmt_name(pix_fmt); + av_log(ctx, AV_LOG_INFO, "R : %9s : %20s :", + fmt_name ? fmt_name : "Unsupported", + vfd.description); + } else if (vfd.flags & V4L2_FMT_FLAG_COMPRESSED && + type & V4L_COMPFORMATS) { + AVCodec *codec = avcodec_find_encoder(codec_id); + av_log(ctx, AV_LOG_INFO, "C : %9s : %20s :", + codec ? codec->name : "Unsupported", + vfd.description); + } else { + continue; + } + +#ifdef V4L2_FMT_FLAG_EMULATED + if (vfd.flags & V4L2_FMT_FLAG_EMULATED) { + av_log(ctx, AV_LOG_WARNING, "%s", "Emulated"); + continue; + } +#endif +#if HAVE_STRUCT_V4L2_FRMIVALENUM_DISCRETE + list_framesizes(ctx, fd, vfd.pixelformat); +#endif + av_log(ctx, AV_LOG_INFO, "\n"); + } } static int mmap_init(AVFormatContext *ctx) { - struct video_data *s = ctx->priv_data; - struct v4l2_requestbuffers req; int i, res; + struct video_data *s = ctx->priv_data; + struct v4l2_requestbuffers req = { + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .count = desired_video_buffers, + .memory = V4L2_MEMORY_MMAP + }; - 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) { @@ -279,12 +375,12 @@ static int mmap_init(AVFormatContext *ctx) } for (i = 0; i < req.count; i++) { - struct v4l2_buffer buf; + struct v4l2_buffer buf = { + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .index = i, + .memory = V4L2_MEMORY_MMAP + }; - 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"); @@ -294,12 +390,16 @@ static int mmap_init(AVFormatContext *ctx) s->buf_len[i] = buf.length; if (s->frame_size > 0 && 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); + 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); + 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)); @@ -310,22 +410,20 @@ static int mmap_init(AVFormatContext *ctx) return 0; } -static int read_init(AVFormatContext *ctx) +#if FF_API_DESTRUCT_PACKET +static void dummy_release_buffer(AVPacket *pkt) { - return -1; + av_assert0(0); } +#endif -static void mmap_release_buffer(AVPacket *pkt) +static void mmap_release_buffer(void *opaque, uint8_t *data) { - struct v4l2_buffer buf; + struct v4l2_buffer buf = { 0 }; int res, fd; - struct buff_data *buf_descriptor = pkt->priv; - - if (pkt->data == NULL) { - return; - } + struct buff_data *buf_descriptor = opaque; + struct video_data *s = buf_descriptor->s; - memset(&buf, 0, sizeof(struct v4l2_buffer)); buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory = V4L2_MEMORY_MMAP; buf.index = buf_descriptor->index; @@ -333,23 +431,28 @@ static void mmap_release_buffer(AVPacket *pkt) av_free(buf_descriptor); res = ioctl(fd, VIDIOC_QBUF, &buf); - if (res < 0) { - av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno)); - } - pkt->data = NULL; - pkt->size = 0; + if (res < 0) + av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", + strerror(errno)); + avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1); } 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; + struct v4l2_buffer buf = { + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .memory = V4L2_MEMORY_MMAP + }; + struct pollfd p = { .fd = s->fd, .events = POLLIN }; int res; - memset(&buf, 0, sizeof(struct v4l2_buffer)); - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_MMAP; + res = poll(&p, 1, s->timeout); + if (res < 0) + return AVERROR(errno); + + if (!(p.revents & (POLLIN | POLLERR | POLLHUP))) + return AVERROR(EAGAIN); /* FIXME: Some special treatment might be needed in case of loss of signal... */ while ((res = ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 && (errno == EINTR)); @@ -359,44 +462,82 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt) return AVERROR(EAGAIN); } - av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n", strerror(errno)); + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n", + strerror(errno)); return AVERROR(errno); } - assert (buf.index < s->buffers); + + if (buf.index >= s->buffers) { + av_log(ctx, AV_LOG_ERROR, "Invalid buffer index received.\n"); + return AVERROR(EINVAL); + } + avpriv_atomic_int_add_and_fetch(&s->buffers_queued, -1); + // always keep at least one buffer queued + av_assert0(avpriv_atomic_int_get(&s->buffers_queued) >= 1); + if (s->frame_size > 0 && 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); + av_log(ctx, AV_LOG_ERROR, + "The v4l2 frame is %d bytes, but %d bytes are expected\n", + buf.bytesused, s->frame_size); return AVERROR_INVALIDDATA; } /* 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"); + if (avpriv_atomic_int_get(&s->buffers_queued) == FFMAX(s->buffers / 8, 1)) { + /* when we start getting low on queued buffers, fall back on copying data */ + res = av_new_packet(pkt, buf.bytesused); + if (res < 0) { + av_log(ctx, AV_LOG_ERROR, "Error allocating a packet.\n"); + return res; + } + memcpy(pkt->data, s->buf_start[buf.index], buf.bytesused); + res = ioctl(s->fd, VIDIOC_QBUF, &buf); + if (res < 0) { + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF)\n"); + av_free_packet(pkt); + return AVERROR(errno); + } + avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1); + } else { + struct buff_data *buf_descriptor; + + pkt->data = s->buf_start[buf.index]; + pkt->size = buf.bytesused; +#if FF_API_DESTRUCT_PACKET +FF_DISABLE_DEPRECATION_WARNINGS + pkt->destruct = dummy_release_buffer; +FF_ENABLE_DEPRECATION_WARNINGS +#endif - return AVERROR(ENOMEM); + 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 memcpying into it + */ + av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n"); + res = ioctl(s->fd, VIDIOC_QBUF, &buf); + + return AVERROR(ENOMEM); + } + buf_descriptor->fd = s->fd; + buf_descriptor->index = buf.index; + buf_descriptor->s = s; + + pkt->buf = av_buffer_create(pkt->data, pkt->size, mmap_release_buffer, + buf_descriptor, 0); + if (!pkt->buf) { + av_freep(&buf_descriptor); + return AVERROR(ENOMEM); + } } - buf_descriptor->fd = s->fd; - buf_descriptor->index = buf.index; - pkt->priv = buf_descriptor; + pkt->pts = buf.timestamp.tv_sec * INT64_C(1000000) + buf.timestamp.tv_usec; 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; @@ -404,25 +545,27 @@ static int mmap_start(AVFormatContext *ctx) 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; + struct v4l2_buffer buf = { + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .index = i, + .memory = V4L2_MEMORY_MMAP + }; res = ioctl(s->fd, VIDIOC_QBUF, &buf); if (res < 0) { - av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno)); + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", + strerror(errno)); return AVERROR(errno); } } + s->buffers_queued = s->buffers; 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)); + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n", + strerror(errno)); return AVERROR(errno); } @@ -447,31 +590,26 @@ static void mmap_close(struct video_data *s) av_free(s->buf_len); } -static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap) +static int v4l2_set_parameters(AVFormatContext *s1) { struct video_data *s = s1->priv_data; - struct v4l2_input input; - struct v4l2_standard standard; + struct v4l2_input input = { 0 }; + struct v4l2_standard standard = { 0 }; struct v4l2_streamparm streamparm = { 0 }; struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe; + AVRational framerate_q = { 0 }; int i, ret; - AVRational framerate_q; streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (s->framerate && (ret = av_parse_video_rate(&framerate_q, s->framerate)) < 0) { - av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate); + if (s->framerate && + (ret = av_parse_video_rate(&framerate_q, s->framerate)) < 0) { + av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", + s->framerate); return ret; } -#if FF_API_FORMAT_PARAMETERS - if (ap->channel > 0) - s->channel = ap->channel; - if (ap->time_base.num) - framerate_q = (AVRational){ap->time_base.den, ap->time_base.num}; -#endif /* set tv video input */ - memset (&input, 0, sizeof (input)); input.index = s->channel; if (ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) { av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl enum input failed:\n"); @@ -481,40 +619,36 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap) av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set input_id: %d, input: %s\n", s->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", + av_log(s1, AV_LOG_ERROR, + "The V4L2 driver ioctl set input(%d) failed\n", s->channel); return AVERROR(EIO); } -#if FF_API_FORMAT_PARAMETERS - if (ap->standard) { - av_freep(&s->standard); - s->standard = av_strdup(ap->standard); - } -#endif - if (s->standard) { av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s\n", s->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", + av_log(s1, AV_LOG_ERROR, + "The V4L2 driver ioctl set standard(%s) failed\n", s->standard); return AVERROR(EIO); } - if (!strcasecmp(standard.name, s->standard)) { + if (!av_strcasecmp(standard.name, s->standard)) { break; } } - av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s, id: %"PRIu64"\n", + av_log(s1, AV_LOG_DEBUG, + "The V4L2 driver set standard: %s, id: %"PRIu64"\n", s->standard, (uint64_t)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", + av_log(s1, AV_LOG_ERROR, + "The V4L2 driver ioctl set standard(%s) failed\n", s->standard); return AVERROR(EIO); } @@ -525,6 +659,7 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap) framerate_q.den, framerate_q.num); tpf->numerator = framerate_q.den; tpf->denominator = framerate_q.num; + if (ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) { av_log(s1, AV_LOG_ERROR, "ioctl set time per frame(%d/%d) failed\n", @@ -535,28 +670,33 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap) if (framerate_q.num != tpf->denominator || framerate_q.den != tpf->numerator) { av_log(s1, AV_LOG_INFO, - "The driver changed the time per frame from %d/%d to %d/%d\n", + "The driver changed the time per frame from " + "%d/%d to %d/%d\n", framerate_q.den, framerate_q.num, tpf->numerator, tpf->denominator); } } else { - /* if timebase value is not set, read the timebase value from the driver */ if (ioctl(s->fd, VIDIOC_G_PARM, &streamparm) != 0) { - av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_PARM): %s\n", strerror(errno)); + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_PARM): %s\n", + strerror(errno)); return AVERROR(errno); } } - s1->streams[0]->codec->time_base.den = tpf->denominator; - s1->streams[0]->codec->time_base.num = tpf->numerator; + s1->streams[0]->avg_frame_rate.num = tpf->denominator; + s1->streams[0]->avg_frame_rate.den = tpf->numerator; + + s->timeout = 100 + + av_rescale_q(1, s1->streams[0]->avg_frame_rate, + (AVRational){1, 1000}); return 0; } static uint32_t device_try_init(AVFormatContext *s1, - enum PixelFormat pix_fmt, + enum AVPixelFormat pix_fmt, int *width, int *height, - enum CodecID *codec_id) + enum AVCodecID *codec_id) { uint32_t desired_format = fmt_ff2v4l(pix_fmt, s1->video_codec_id); @@ -566,7 +706,7 @@ static uint32_t device_try_init(AVFormatContext *s1, desired_format = 0; for (i = 0; ivideo_codec_id == CODEC_ID_NONE || + if (s1->video_codec_id == AV_CODEC_ID_NONE || fmt_conversion_table[i].codec_id == s1->video_codec_id) { desired_format = fmt_conversion_table[i].v4l2_fmt; if (device_init(s1, width, height, desired_format) >= 0) { @@ -576,140 +716,136 @@ static uint32_t device_try_init(AVFormatContext *s1, } } } + if (desired_format != 0) { *codec_id = fmt_v4l2codec(desired_format); - assert(*codec_id != CODEC_ID_NONE); + assert(*codec_id != AV_CODEC_ID_NONE); } return desired_format; } -static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap) +static int v4l2_read_header(AVFormatContext *s1) { struct video_data *s = s1->priv_data; AVStream *st; int res = 0; - uint32_t desired_format, capabilities; - enum CodecID codec_id; - enum PixelFormat pix_fmt = PIX_FMT_NONE; - - st = av_new_stream(s1, 0); - if (!st) { - res = AVERROR(ENOMEM); - goto out; - } - av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ - - if (s->video_size && (res = av_parse_video_size(&s->width, &s->height, s->video_size)) < 0) { - av_log(s1, AV_LOG_ERROR, "Could not parse video size '%s'.\n", s->video_size); - goto out; - } - if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) { - av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format); - res = AVERROR(EINVAL); - goto out; - } -#if FF_API_FORMAT_PARAMETERS - if (ap->width > 0) - s->width = ap->width; - if (ap->height > 0) - s->height = ap->height; - if (ap->pix_fmt) - pix_fmt = ap->pix_fmt; -#endif + uint32_t desired_format; + enum AVCodecID codec_id; + enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE; + + st = avformat_new_stream(s1, NULL); + if (!st) + return AVERROR(ENOMEM); + + s->fd = device_open(s1); + if (s->fd < 0) + return s->fd; + + if (s->list_format) { + list_formats(s1, s->fd, s->list_format); + return AVERROR_EXIT; + } + + avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ + + if (s->video_size && + (res = av_parse_video_size(&s->width, &s->height, s->video_size)) < 0) { + av_log(s1, AV_LOG_ERROR, "Could not parse video size '%s'.\n", + s->video_size); + return res; + } + + if (s->pixel_format) { + AVCodec *codec = avcodec_find_decoder_by_name(s->pixel_format); - capabilities = 0; - s->fd = device_open(s1, &capabilities); - if (s->fd < 0) { - res = AVERROR(EIO); - goto out; + if (codec) + s1->video_codec_id = codec->id; + + pix_fmt = av_get_pix_fmt(s->pixel_format); + + if (pix_fmt == AV_PIX_FMT_NONE && !codec) { + av_log(s1, AV_LOG_ERROR, "No such input format: %s.\n", + s->pixel_format); + + return AVERROR(EINVAL); + } } - av_log(s1, AV_LOG_VERBOSE, "[%d]Capabilities: %x\n", s->fd, capabilities); if (!s->width && !s->height) { struct v4l2_format fmt; - av_log(s1, AV_LOG_VERBOSE, "Querying the device for the current frame size\n"); + av_log(s1, AV_LOG_VERBOSE, + "Querying the device for the current frame size\n"); fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (ioctl(s->fd, VIDIOC_G_FMT, &fmt) < 0) { - av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n", strerror(errno)); - res = AVERROR(errno); - goto out; + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n", + strerror(errno)); + return AVERROR(errno); } + s->width = fmt.fmt.pix.width; s->height = fmt.fmt.pix.height; - av_log(s1, AV_LOG_VERBOSE, "Setting frame size to %dx%d\n", s->width, s->height); + av_log(s1, AV_LOG_VERBOSE, + "Setting frame size to %dx%d\n", s->width, s->height); } - desired_format = device_try_init(s1, pix_fmt, &s->width, &s->height, &codec_id); + desired_format = device_try_init(s1, pix_fmt, &s->width, &s->height, + &codec_id); if (desired_format == 0) { av_log(s1, AV_LOG_ERROR, "Cannot find a proper format for " "codec_id %d, pix_fmt %d.\n", s1->video_codec_id, pix_fmt); close(s->fd); - res = AVERROR(EIO); - goto out; + return AVERROR(EIO); } + if ((res = av_image_check_size(s->width, s->height, 0, s1) < 0)) - goto out; + return res; + s->frame_format = desired_format; - if ((res = v4l2_set_parameters(s1, ap) < 0)) - goto out; + if ((res = v4l2_set_parameters(s1) < 0)) + return res; st->codec->pix_fmt = fmt_v4l2ff(desired_format, codec_id); - s->frame_size = avpicture_get_size(st->codec->pix_fmt, s->width, s->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); + s->frame_size = + avpicture_get_size(st->codec->pix_fmt, s->width, s->height); - res = AVERROR(EIO); - goto out; + if ((res = mmap_init(s1)) || + (res = mmap_start(s1)) < 0) { + close(s->fd); + return res; } + s->top_field_first = first_field(s->fd); st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = codec_id; + if (codec_id == AV_CODEC_ID_RAWVIDEO) + st->codec->codec_tag = + avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); st->codec->width = s->width; st->codec->height = s->height; - st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8; + st->codec->bit_rate = s->frame_size * av_q2d(st->avg_frame_rate) * 8; -out: - return res; + return 0; } static int v4l2_read_packet(AVFormatContext *s1, AVPacket *pkt) { struct video_data *s = s1->priv_data; + AVFrame *frame = s1->streams[0]->codec->coded_frame; 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) { + av_init_packet(pkt); + if ((res = mmap_read_frame(s1, pkt)) < 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; + if (frame && s->interlaced) { + frame->interlaced_frame = 1; + frame->top_field_first = s->top_field_first; } return pkt->size; @@ -719,9 +855,11 @@ static int v4l2_read_close(AVFormatContext *s1) { struct video_data *s = s1->priv_data; - if (s->io_method == io_mmap) { - mmap_close(s); - } + if (avpriv_atomic_int_get(&s->buffers_queued) != s->buffers) + av_log(s1, AV_LOG_WARNING, "Some buffers are still owned by the caller on " + "close.\n"); + + mmap_close(s); close(s->fd); return 0; @@ -730,11 +868,16 @@ static int v4l2_read_close(AVFormatContext *s1) #define OFFSET(x) offsetof(struct video_data, x) #define DEC AV_OPT_FLAG_DECODING_PARAM static const AVOption options[] = { - { "standard", "", offsetof(struct video_data, standard), FF_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_DECODING_PARAM }, - { "channel", "", offsetof(struct video_data, channel), FF_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, - { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, - { "pixel_format", "", OFFSET(pixel_format), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, - { "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, + { "standard", "TV standard, used only by analog frame grabber", OFFSET(standard), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC }, + { "channel", "TV channel, used only by frame grabber", OFFSET(channel), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC }, + { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, + { "pixel_format", "Preferred pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, + { "input_format", "Preferred pixel format (for raw video) or codec name", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, + { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, + { "list_formats", "List available formats and exit", OFFSET(list_format), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC, "list_formats" }, + { "all", "Show all available formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_ALLFORMATS }, 0, INT_MAX, DEC, "list_formats" }, + { "raw", "Show only non-compressed formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_RAWFORMATS }, 0, INT_MAX, DEC, "list_formats" }, + { "compressed", "Show only compressed formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_COMPFORMATS }, 0, INT_MAX, DEC, "list_formats" }, { NULL }, }; @@ -746,13 +889,12 @@ static const AVClass v4l2_class = { }; AVInputFormat ff_v4l2_demuxer = { - "video4linux2", - NULL_IF_CONFIG_SMALL("Video4Linux2 device grab"), - sizeof(struct video_data), - NULL, - v4l2_read_header, - v4l2_read_packet, - v4l2_read_close, - .flags = AVFMT_NOFILE, - .priv_class = &v4l2_class, + .name = "video4linux2", + .long_name = NULL_IF_CONFIG_SMALL("Video4Linux2 device grab"), + .priv_data_size = sizeof(struct video_data), + .read_header = v4l2_read_header, + .read_packet = v4l2_read_packet, + .read_close = v4l2_read_close, + .flags = AVFMT_NOFILE, + .priv_class = &v4l2_class, };