* VFW capture interface
* Copyright (c) 2006-2008 Ramiro Polla
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "libavformat/avformat.h"
-#include <vfw.h>
-#include <windows.h>
+#include "libavutil/internal.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
-//#define DEBUG_VFW
-
-/* Defines for VFW missing from MinGW.
- * Remove this when MinGW incorporates them. */
-#define HWND_MESSAGE ((HWND)-3)
+#include "libavformat/avformat.h"
+#include "libavformat/internal.h"
-#define BI_RGB 0
+// windows.h must no be included before winsock2.h, and libavformat internal
+// headers may include winsock2.h
+#include <windows.h>
+// windows.h needs to be included before vfw.h
+#include <vfw.h>
-/* End of missing MinGW defines */
+/* Some obsolete versions of MinGW32 before 4.0.0 lack this. */
+#ifndef HWND_MESSAGE
+#define HWND_MESSAGE ((HWND) -3)
+#endif
struct vfw_ctx {
+ const AVClass *class;
HWND hwnd;
HANDLE mutex;
HANDLE event;
AVPacketList *pktl;
- AVFormatContext *s;
unsigned int curbufsize;
unsigned int frame_num;
+ char *video_size; /**< A string describing video size, set by a private option. */
+ char *framerate; /**< Set by a private option. */
};
-static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
+static enum AVPixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
{
switch(biCompression) {
+ case MKTAG('U', 'Y', 'V', 'Y'):
+ return AV_PIX_FMT_UYVY422;
case MKTAG('Y', 'U', 'Y', '2'):
- return PIX_FMT_YUYV422;
+ return AV_PIX_FMT_YUYV422;
case MKTAG('I', '4', '2', '0'):
- return PIX_FMT_YUV420P;
+ return AV_PIX_FMT_YUV420P;
case BI_RGB:
switch(biBitCount) { /* 1-8 are untested */
case 1:
- return PIX_FMT_MONOWHITE;
+ return AV_PIX_FMT_MONOWHITE;
case 4:
- return PIX_FMT_RGB4;
+ return AV_PIX_FMT_RGB4;
case 8:
- return PIX_FMT_RGB8;
+ return AV_PIX_FMT_RGB8;
case 16:
- return PIX_FMT_RGB555;
+ return AV_PIX_FMT_RGB555;
case 24:
- return PIX_FMT_BGR24;
+ return AV_PIX_FMT_BGR24;
case 32:
- return PIX_FMT_RGB32;
+ return AV_PIX_FMT_RGB32;
}
}
- return PIX_FMT_NONE;
+ return AV_PIX_FMT_NONE;
+}
+
+static enum AVCodecID vfw_codecid(DWORD biCompression)
+{
+ switch(biCompression) {
+ case MKTAG('d', 'v', 's', 'd'):
+ return AV_CODEC_ID_DVVIDEO;
+ case MKTAG('M', 'J', 'P', 'G'):
+ case MKTAG('m', 'j', 'p', 'g'):
+ return AV_CODEC_ID_MJPEG;
+ }
+ return AV_CODEC_ID_NONE;
}
#define dstruct(pctx, sname, var, type) \
static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
{
-#ifdef DEBUG_VFW
+#ifdef DEBUG
av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
dstruct(s, vhdr, lpData, "p");
dstruct(s, vhdr, dwBufferLength, "lu");
dstruct(s, bih, biClrImportant, "lu");
}
-static int shall_we_drop(struct vfw_ctx *ctx)
+static int shall_we_drop(AVFormatContext *s)
{
- AVFormatContext *s = ctx->s;
- const uint8_t dropscore[] = {62, 75, 87, 100};
+ struct vfw_ctx *ctx = s->priv_data;
+ static const uint8_t dropscore[4] = { 62, 75, 87, 100 };
const int ndropscores = FF_ARRAY_ELEMS(dropscore);
unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
- av_log(ctx->s, AV_LOG_ERROR,
+ av_log(s, AV_LOG_ERROR,
"real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
return 1;
}
static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
{
+ AVFormatContext *s;
struct vfw_ctx *ctx;
AVPacketList **ppktl, *pktl_next;
- ctx = (struct vfw_ctx *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
+ s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
+ ctx = s->priv_data;
- dump_videohdr(ctx->s, vdhdr);
+ dump_videohdr(s, vdhdr);
- if(shall_we_drop(ctx))
+ if(shall_we_drop(s))
return FALSE;
WaitForSingleObject(ctx->mutex, INFINITE);
return FALSE;
}
-static int vfw_read_close(AVFormatContext *s);
+static int vfw_read_close(AVFormatContext *s)
+{
+ struct vfw_ctx *ctx = s->priv_data;
+ AVPacketList *pktl;
+
+ if(ctx->hwnd) {
+ SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
+ SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
+ DestroyWindow(ctx->hwnd);
+ }
+ if(ctx->mutex)
+ CloseHandle(ctx->mutex);
+ if(ctx->event)
+ CloseHandle(ctx->event);
+
+ pktl = ctx->pktl;
+ while (pktl) {
+ AVPacketList *next = pktl->next;
+ av_packet_unref(&pktl->pkt);
+ av_free(pktl);
+ pktl = next;
+ }
+
+ return 0;
+}
-static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int vfw_read_header(AVFormatContext *s)
{
struct vfw_ctx *ctx = s->priv_data;
- AVCodecContext *codec;
+ AVCodecParameters *par;
AVStream *st;
int devnum;
int bisize;
CAPTUREPARMS cparms;
DWORD biCompression;
WORD biBitCount;
- int width;
- int height;
int ret;
-
- if(!ap->time_base.den) {
- av_log(s, AV_LOG_ERROR, "A time base must be specified.\n");
- return AVERROR_IO;
+ AVRational framerate_q;
+
+ if (!strcmp(s->filename, "list")) {
+ for (devnum = 0; devnum <= 9; devnum++) {
+ char driver_name[256];
+ char driver_ver[256];
+ ret = capGetDriverDescription(devnum,
+ driver_name, sizeof(driver_name),
+ driver_ver, sizeof(driver_ver));
+ if (ret) {
+ av_log(s, AV_LOG_INFO, "Driver %d\n", devnum);
+ av_log(s, AV_LOG_INFO, " %s\n", driver_name);
+ av_log(s, AV_LOG_INFO, " %s\n", driver_ver);
+ }
+ }
+ return AVERROR(EIO);
}
- ctx->s = s;
-
ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
if(!ctx->hwnd) {
av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
- return AVERROR_IO;
+ return AVERROR(EIO);
}
/* If atoi fails, devnum==0 and the default device is used */
goto fail_io;
}
- SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) ctx);
+ SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s);
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if(!st) {
vfw_read_close(s);
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
}
/* Set video format */
bi = av_malloc(bisize);
if(!bi) {
vfw_read_close(s);
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
}
ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
if(!ret)
dump_bih(s, &bi->bmiHeader);
- width = ap->width ? ap->width : bi->bmiHeader.biWidth ;
- height = ap->height ? ap->height : bi->bmiHeader.biHeight;
- bi->bmiHeader.biWidth = width ;
- bi->bmiHeader.biHeight = height;
-
-#if 0
- /* For testing yet unsupported compressions
- * Copy these values from user-supplied verbose information */
- bi->bmiHeader.biWidth = 320;
- bi->bmiHeader.biHeight = 240;
- bi->bmiHeader.biPlanes = 1;
- bi->bmiHeader.biBitCount = 12;
- bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
- bi->bmiHeader.biSizeImage = 115200;
- dump_bih(s, &bi->bmiHeader);
-#endif
+
+ if (ctx->video_size) {
+ ret = av_parse_video_size(&bi->bmiHeader.biWidth, &bi->bmiHeader.biHeight, ctx->video_size);
+ if (ret < 0) {
+ av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
+ goto fail_bi;
+ }
+ }
+
+ if (0) {
+ /* For testing yet unsupported compressions
+ * Copy these values from user-supplied verbose information */
+ bi->bmiHeader.biWidth = 320;
+ bi->bmiHeader.biHeight = 240;
+ bi->bmiHeader.biPlanes = 1;
+ bi->bmiHeader.biBitCount = 12;
+ bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
+ bi->bmiHeader.biSizeImage = 115200;
+ dump_bih(s, &bi->bmiHeader);
+ }
ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
if(!ret) {
cparms.fYield = 1; // Spawn a background thread
cparms.dwRequestMicroSecPerFrame =
- (ap->time_base.num*1000000) / ap->time_base.den;
+ (framerate_q.den*1000000) / framerate_q.num;
cparms.fAbortLeftMouse = 0;
cparms.fAbortRightMouse = 0;
cparms.fCaptureAudio = 0;
if(!ret)
goto fail_io;
- codec = st->codec;
- codec->time_base = ap->time_base;
- codec->codec_type = CODEC_TYPE_VIDEO;
- codec->width = width;
- codec->height = height;
- codec->codec_id = CODEC_ID_RAWVIDEO;
- codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
- if(biCompression == BI_RGB)
- codec->bits_per_coded_sample = biBitCount;
-
- av_set_pts_info(st, 32, 1, 1000);
-
- if(codec->pix_fmt == PIX_FMT_NONE) {
- av_log(s, AV_LOG_ERROR, "Unknown compression type. "
- "Please report verbose (-v 9) debug information.\n");
- vfw_read_close(s);
- return AVERROR_PATCHWELCOME;
+ st->avg_frame_rate = framerate_q;
+
+ par = st->codecpar;
+ par->codec_type = AVMEDIA_TYPE_VIDEO;
+ par->width = bi->bmiHeader.biWidth;
+ par->height = bi->bmiHeader.biHeight;
+ par->format = vfw_pixfmt(biCompression, biBitCount);
+ if (par->format == AV_PIX_FMT_NONE) {
+ par->codec_id = vfw_codecid(biCompression);
+ if (par->codec_id == AV_CODEC_ID_NONE) {
+ av_log(s, AV_LOG_ERROR, "Unknown compression type. "
+ "Please report verbose (-v 9) debug information.\n");
+ vfw_read_close(s);
+ return AVERROR_PATCHWELCOME;
+ }
+ par->bits_per_coded_sample = biBitCount;
+ } else {
+ par->codec_id = AV_CODEC_ID_RAWVIDEO;
+ if(biCompression == BI_RGB) {
+ par->bits_per_coded_sample = biBitCount;
+ par->extradata = av_malloc(9 + AV_INPUT_BUFFER_PADDING_SIZE);
+ if (par->extradata) {
+ par->extradata_size = 9;
+ memcpy(par->extradata, "BottomUp", 9);
+ }
+ }
}
+ avpriv_set_pts_info(st, 32, 1, 1000);
+
ctx->mutex = CreateMutex(NULL, 0, NULL);
if(!ctx->mutex) {
av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
fail_io:
vfw_read_close(s);
- return AVERROR_IO;
+ return AVERROR(EIO);
}
static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
return pkt->size;
}
-static int vfw_read_close(AVFormatContext *s)
-{
- struct vfw_ctx *ctx = s->priv_data;
-
- if(ctx->hwnd) {
- SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
- SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
- DestroyWindow(ctx->hwnd);
- }
- if(ctx->mutex)
- CloseHandle(ctx->mutex);
- if(ctx->event)
- CloseHandle(ctx->event);
+#define OFFSET(x) offsetof(struct vfw_ctx, 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 = NULL}, 0, 0, DEC },
+ { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
+ { NULL },
+};
- return 0;
-}
+static const AVClass vfw_class = {
+ .class_name = "VFW indev",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
-AVInputFormat vfwcap_demuxer = {
- "vfwcap",
- NULL_IF_CONFIG_SMALL("VFW video capture"),
- sizeof(struct vfw_ctx),
- NULL,
- vfw_read_header,
- vfw_read_packet,
- vfw_read_close,
- .flags = AVFMT_NOFILE,
+AVInputFormat ff_vfwcap_demuxer = {
+ .name = "vfwcap",
+ .long_name = NULL_IF_CONFIG_SMALL("VfW video capture"),
+ .priv_data_size = sizeof(struct vfw_ctx),
+ .read_header = vfw_read_header,
+ .read_packet = vfw_read_packet,
+ .read_close = vfw_read_close,
+ .flags = AVFMT_NOFILE,
+ .priv_class = &vfw_class,
};
projects / ffmpeg / blobdiff