0,0 → 1,483 |
/* |
* VFW capture interface |
* Copyright (c) 2006-2008 Ramiro Polla |
* |
* 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 "libavformat/internal.h" |
#include "libavutil/log.h" |
#include "libavutil/opt.h" |
#include "libavutil/parseutils.h" |
#include <windows.h> |
#include <vfw.h> |
#include "avdevice.h" |
|
/* Defines for VFW missing from MinGW. |
* Remove this when MinGW incorporates them. */ |
#define HWND_MESSAGE ((HWND)-3) |
|
/* End of missing MinGW defines */ |
|
struct vfw_ctx { |
const AVClass *class; |
HWND hwnd; |
HANDLE mutex; |
HANDLE event; |
AVPacketList *pktl; |
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 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 AV_PIX_FMT_YUYV422; |
case MKTAG('I', '4', '2', '0'): |
return AV_PIX_FMT_YUV420P; |
case BI_RGB: |
switch(biBitCount) { /* 1-8 are untested */ |
case 1: |
return AV_PIX_FMT_MONOWHITE; |
case 4: |
return AV_PIX_FMT_RGB4; |
case 8: |
return AV_PIX_FMT_RGB8; |
case 16: |
return AV_PIX_FMT_RGB555; |
case 24: |
return AV_PIX_FMT_BGR24; |
case 32: |
return AV_PIX_FMT_RGB32; |
} |
} |
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) \ |
av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var) |
|
static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms) |
{ |
av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n"); |
dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu"); |
dstruct(s, cparms, fMakeUserHitOKToCapture, "d"); |
dstruct(s, cparms, wPercentDropForError, "u"); |
dstruct(s, cparms, fYield, "d"); |
dstruct(s, cparms, dwIndexSize, "lu"); |
dstruct(s, cparms, wChunkGranularity, "u"); |
dstruct(s, cparms, fUsingDOSMemory, "d"); |
dstruct(s, cparms, wNumVideoRequested, "u"); |
dstruct(s, cparms, fCaptureAudio, "d"); |
dstruct(s, cparms, wNumAudioRequested, "u"); |
dstruct(s, cparms, vKeyAbort, "u"); |
dstruct(s, cparms, fAbortLeftMouse, "d"); |
dstruct(s, cparms, fAbortRightMouse, "d"); |
dstruct(s, cparms, fLimitEnabled, "d"); |
dstruct(s, cparms, wTimeLimit, "u"); |
dstruct(s, cparms, fMCIControl, "d"); |
dstruct(s, cparms, fStepMCIDevice, "d"); |
dstruct(s, cparms, dwMCIStartTime, "lu"); |
dstruct(s, cparms, dwMCIStopTime, "lu"); |
dstruct(s, cparms, fStepCaptureAt2x, "d"); |
dstruct(s, cparms, wStepCaptureAverageFrames, "u"); |
dstruct(s, cparms, dwAudioBufferSize, "lu"); |
dstruct(s, cparms, fDisableWriteCache, "d"); |
dstruct(s, cparms, AVStreamMaster, "u"); |
} |
|
static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr) |
{ |
#ifdef DEBUG |
av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n"); |
dstruct(s, vhdr, lpData, "p"); |
dstruct(s, vhdr, dwBufferLength, "lu"); |
dstruct(s, vhdr, dwBytesUsed, "lu"); |
dstruct(s, vhdr, dwTimeCaptured, "lu"); |
dstruct(s, vhdr, dwUser, "lu"); |
dstruct(s, vhdr, dwFlags, "lu"); |
dstruct(s, vhdr, dwReserved[0], "lu"); |
dstruct(s, vhdr, dwReserved[1], "lu"); |
dstruct(s, vhdr, dwReserved[2], "lu"); |
dstruct(s, vhdr, dwReserved[3], "lu"); |
#endif |
} |
|
static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih) |
{ |
av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n"); |
dstruct(s, bih, biSize, "lu"); |
dstruct(s, bih, biWidth, "ld"); |
dstruct(s, bih, biHeight, "ld"); |
dstruct(s, bih, biPlanes, "d"); |
dstruct(s, bih, biBitCount, "d"); |
dstruct(s, bih, biCompression, "lu"); |
av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n", |
(char*) &bih->biCompression); |
dstruct(s, bih, biSizeImage, "lu"); |
dstruct(s, bih, biXPelsPerMeter, "lu"); |
dstruct(s, bih, biYPelsPerMeter, "lu"); |
dstruct(s, bih, biClrUsed, "lu"); |
dstruct(s, bih, biClrImportant, "lu"); |
} |
|
static int shall_we_drop(AVFormatContext *s) |
{ |
struct vfw_ctx *ctx = s->priv_data; |
static const uint8_t dropscore[] = {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(s, AV_LOG_ERROR, |
"real-time buffer %d%% full! frame dropped!\n", buffer_fullness); |
return 1; |
} |
|
return 0; |
} |
|
static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr) |
{ |
AVFormatContext *s; |
struct vfw_ctx *ctx; |
AVPacketList **ppktl, *pktl_next; |
|
s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA); |
ctx = s->priv_data; |
|
dump_videohdr(s, vdhdr); |
|
if(shall_we_drop(s)) |
return FALSE; |
|
WaitForSingleObject(ctx->mutex, INFINITE); |
|
pktl_next = av_mallocz(sizeof(AVPacketList)); |
if(!pktl_next) |
goto fail; |
|
if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) { |
av_free(pktl_next); |
goto fail; |
} |
|
pktl_next->pkt.pts = vdhdr->dwTimeCaptured; |
memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed); |
|
for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next); |
*ppktl = pktl_next; |
|
ctx->curbufsize += vdhdr->dwBytesUsed; |
|
SetEvent(ctx->event); |
ReleaseMutex(ctx->mutex); |
|
return TRUE; |
fail: |
ReleaseMutex(ctx->mutex); |
return FALSE; |
} |
|
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_destruct_packet(&pktl->pkt); |
av_free(pktl); |
pktl = next; |
} |
|
return 0; |
} |
|
static int vfw_read_header(AVFormatContext *s) |
{ |
struct vfw_ctx *ctx = s->priv_data; |
AVCodecContext *codec; |
AVStream *st; |
int devnum; |
int bisize; |
BITMAPINFO *bi = NULL; |
CAPTUREPARMS cparms; |
DWORD biCompression; |
WORD biBitCount; |
int ret; |
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->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(EIO); |
} |
|
/* If atoi fails, devnum==0 and the default device is used */ |
devnum = atoi(s->filename); |
|
ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0); |
if(!ret) { |
av_log(s, AV_LOG_ERROR, "Could not connect to device.\n"); |
DestroyWindow(ctx->hwnd); |
return AVERROR(ENODEV); |
} |
|
SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0); |
SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0); |
|
ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, |
(LPARAM) videostream_cb); |
if(!ret) { |
av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n"); |
goto fail; |
} |
|
SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s); |
|
st = avformat_new_stream(s, NULL); |
if(!st) { |
vfw_read_close(s); |
return AVERROR(ENOMEM); |
} |
|
/* Set video format */ |
bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0); |
if(!bisize) |
goto fail; |
bi = av_malloc(bisize); |
if(!bi) { |
vfw_read_close(s); |
return AVERROR(ENOMEM); |
} |
ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi); |
if(!ret) |
goto fail; |
|
dump_bih(s, &bi->bmiHeader); |
|
ret = av_parse_video_rate(&framerate_q, ctx->framerate); |
if (ret < 0) { |
av_log(s, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate); |
goto fail; |
} |
|
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; |
} |
} |
|
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) { |
av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n"); |
goto fail; |
} |
|
biCompression = bi->bmiHeader.biCompression; |
biBitCount = bi->bmiHeader.biBitCount; |
|
/* Set sequence setup */ |
ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms), |
(LPARAM) &cparms); |
if(!ret) |
goto fail; |
|
dump_captureparms(s, &cparms); |
|
cparms.fYield = 1; // Spawn a background thread |
cparms.dwRequestMicroSecPerFrame = |
(framerate_q.den*1000000) / framerate_q.num; |
cparms.fAbortLeftMouse = 0; |
cparms.fAbortRightMouse = 0; |
cparms.fCaptureAudio = 0; |
cparms.vKeyAbort = 0; |
|
ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms), |
(LPARAM) &cparms); |
if(!ret) |
goto fail; |
|
codec = st->codec; |
codec->time_base = av_inv_q(framerate_q); |
codec->codec_type = AVMEDIA_TYPE_VIDEO; |
codec->width = bi->bmiHeader.biWidth; |
codec->height = bi->bmiHeader.biHeight; |
codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount); |
if(codec->pix_fmt == AV_PIX_FMT_NONE) { |
codec->codec_id = vfw_codecid(biCompression); |
if(codec->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; |
} |
codec->bits_per_coded_sample = biBitCount; |
} else { |
codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
if(biCompression == BI_RGB) { |
codec->bits_per_coded_sample = biBitCount; |
codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE); |
if (codec->extradata) { |
codec->extradata_size = 9; |
memcpy(codec->extradata, "BottomUp", 9); |
} |
} |
} |
|
av_freep(&bi); |
|
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" ); |
goto fail; |
} |
ctx->event = CreateEvent(NULL, 1, 0, NULL); |
if(!ctx->event) { |
av_log(s, AV_LOG_ERROR, "Could not create Event.\n" ); |
goto fail; |
} |
|
ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0); |
if(!ret) { |
av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" ); |
goto fail; |
} |
|
return 0; |
|
fail: |
av_freep(&bi); |
vfw_read_close(s); |
return AVERROR(EIO); |
} |
|
static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt) |
{ |
struct vfw_ctx *ctx = s->priv_data; |
AVPacketList *pktl = NULL; |
|
while(!pktl) { |
WaitForSingleObject(ctx->mutex, INFINITE); |
pktl = ctx->pktl; |
if(ctx->pktl) { |
*pkt = ctx->pktl->pkt; |
ctx->pktl = ctx->pktl->next; |
av_free(pktl); |
} |
ResetEvent(ctx->event); |
ReleaseMutex(ctx->mutex); |
if(!pktl) { |
if(s->flags & AVFMT_FLAG_NONBLOCK) { |
return AVERROR(EAGAIN); |
} else { |
WaitForSingleObject(ctx->event, INFINITE); |
} |
} |
} |
|
ctx->curbufsize -= pkt->size; |
|
return pkt->size; |
} |
|
#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 }, |
}; |
|
static const AVClass vfw_class = { |
.class_name = "VFW indev", |
.item_name = av_default_item_name, |
.option = options, |
.version = LIBAVUTIL_VERSION_INT, |
}; |
|
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, |
}; |