0,0 → 1,1095 |
/* |
* Directshow capture interface |
* Copyright (c) 2010 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 "libavutil/parseutils.h" |
#include "libavutil/pixdesc.h" |
#include "libavutil/opt.h" |
#include "libavformat/internal.h" |
#include "libavformat/riff.h" |
#include "avdevice.h" |
#include "dshow_capture.h" |
#include "libavcodec/raw.h" |
|
struct dshow_ctx { |
const AVClass *class; |
|
IGraphBuilder *graph; |
|
char *device_name[2]; |
int video_device_number; |
int audio_device_number; |
|
int list_options; |
int list_devices; |
int audio_buffer_size; |
|
IBaseFilter *device_filter[2]; |
IPin *device_pin[2]; |
libAVFilter *capture_filter[2]; |
libAVPin *capture_pin[2]; |
|
HANDLE mutex; |
HANDLE event[2]; /* event[0] is set by DirectShow |
* event[1] is set by callback() */ |
AVPacketList *pktl; |
|
int eof; |
|
int64_t curbufsize; |
unsigned int video_frame_num; |
|
IMediaControl *control; |
IMediaEvent *media_event; |
|
enum AVPixelFormat pixel_format; |
enum AVCodecID video_codec_id; |
char *framerate; |
|
int requested_width; |
int requested_height; |
AVRational requested_framerate; |
|
int sample_rate; |
int sample_size; |
int channels; |
}; |
|
static enum AVPixelFormat dshow_pixfmt(DWORD biCompression, WORD biBitCount) |
{ |
switch(biCompression) { |
case BI_BITFIELDS: |
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 avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, biCompression); // all others |
} |
|
static int |
dshow_read_close(AVFormatContext *s) |
{ |
struct dshow_ctx *ctx = s->priv_data; |
AVPacketList *pktl; |
|
if (ctx->control) { |
IMediaControl_Stop(ctx->control); |
IMediaControl_Release(ctx->control); |
} |
|
if (ctx->media_event) |
IMediaEvent_Release(ctx->media_event); |
|
if (ctx->graph) { |
IEnumFilters *fenum; |
int r; |
r = IGraphBuilder_EnumFilters(ctx->graph, &fenum); |
if (r == S_OK) { |
IBaseFilter *f; |
IEnumFilters_Reset(fenum); |
while (IEnumFilters_Next(fenum, 1, &f, NULL) == S_OK) { |
if (IGraphBuilder_RemoveFilter(ctx->graph, f) == S_OK) |
IEnumFilters_Reset(fenum); /* When a filter is removed, |
* the list must be reset. */ |
IBaseFilter_Release(f); |
} |
IEnumFilters_Release(fenum); |
} |
IGraphBuilder_Release(ctx->graph); |
} |
|
if (ctx->capture_pin[VideoDevice]) |
libAVPin_Release(ctx->capture_pin[VideoDevice]); |
if (ctx->capture_pin[AudioDevice]) |
libAVPin_Release(ctx->capture_pin[AudioDevice]); |
if (ctx->capture_filter[VideoDevice]) |
libAVFilter_Release(ctx->capture_filter[VideoDevice]); |
if (ctx->capture_filter[AudioDevice]) |
libAVFilter_Release(ctx->capture_filter[AudioDevice]); |
|
if (ctx->device_pin[VideoDevice]) |
IPin_Release(ctx->device_pin[VideoDevice]); |
if (ctx->device_pin[AudioDevice]) |
IPin_Release(ctx->device_pin[AudioDevice]); |
if (ctx->device_filter[VideoDevice]) |
IBaseFilter_Release(ctx->device_filter[VideoDevice]); |
if (ctx->device_filter[AudioDevice]) |
IBaseFilter_Release(ctx->device_filter[AudioDevice]); |
|
if (ctx->device_name[0]) |
av_free(ctx->device_name[0]); |
if (ctx->device_name[1]) |
av_free(ctx->device_name[1]); |
|
if(ctx->mutex) |
CloseHandle(ctx->mutex); |
if(ctx->event[0]) |
CloseHandle(ctx->event[0]); |
if(ctx->event[1]) |
CloseHandle(ctx->event[1]); |
|
pktl = ctx->pktl; |
while (pktl) { |
AVPacketList *next = pktl->next; |
av_destruct_packet(&pktl->pkt); |
av_free(pktl); |
pktl = next; |
} |
|
CoUninitialize(); |
|
return 0; |
} |
|
static char *dup_wchar_to_utf8(wchar_t *w) |
{ |
char *s = NULL; |
int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0); |
s = av_malloc(l); |
if (s) |
WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0); |
return s; |
} |
|
static int shall_we_drop(AVFormatContext *s) |
{ |
struct dshow_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->video_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 void |
callback(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time) |
{ |
AVFormatContext *s = priv_data; |
struct dshow_ctx *ctx = s->priv_data; |
AVPacketList **ppktl, *pktl_next; |
|
// dump_videohdr(s, vdhdr); |
|
WaitForSingleObject(ctx->mutex, INFINITE); |
|
if(shall_we_drop(s)) |
goto fail; |
|
pktl_next = av_mallocz(sizeof(AVPacketList)); |
if(!pktl_next) |
goto fail; |
|
if(av_new_packet(&pktl_next->pkt, buf_size) < 0) { |
av_free(pktl_next); |
goto fail; |
} |
|
pktl_next->pkt.stream_index = index; |
pktl_next->pkt.pts = time; |
memcpy(pktl_next->pkt.data, buf, buf_size); |
|
for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next); |
*ppktl = pktl_next; |
|
ctx->curbufsize += buf_size; |
|
SetEvent(ctx->event[1]); |
ReleaseMutex(ctx->mutex); |
|
return; |
fail: |
ReleaseMutex(ctx->mutex); |
return; |
} |
|
/** |
* Cycle through available devices using the device enumerator devenum, |
* retrieve the device with type specified by devtype and return the |
* pointer to the object found in *pfilter. |
* If pfilter is NULL, list all device names. |
*/ |
static int |
dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum, |
enum dshowDeviceType devtype, IBaseFilter **pfilter) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
IBaseFilter *device_filter = NULL; |
IEnumMoniker *classenum = NULL; |
IMoniker *m = NULL; |
const char *device_name = ctx->device_name[devtype]; |
int skip = (devtype == VideoDevice) ? ctx->video_device_number |
: ctx->audio_device_number; |
int r; |
|
const GUID *device_guid[2] = { &CLSID_VideoInputDeviceCategory, |
&CLSID_AudioInputDeviceCategory }; |
const char *devtypename = (devtype == VideoDevice) ? "video" : "audio"; |
|
r = ICreateDevEnum_CreateClassEnumerator(devenum, device_guid[devtype], |
(IEnumMoniker **) &classenum, 0); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not enumerate %s devices.\n", |
devtypename); |
return AVERROR(EIO); |
} |
|
while (!device_filter && IEnumMoniker_Next(classenum, 1, &m, NULL) == S_OK) { |
IPropertyBag *bag = NULL; |
char *buf = NULL; |
VARIANT var; |
|
r = IMoniker_BindToStorage(m, 0, 0, &IID_IPropertyBag, (void *) &bag); |
if (r != S_OK) |
goto fail1; |
|
var.vt = VT_BSTR; |
r = IPropertyBag_Read(bag, L"FriendlyName", &var, NULL); |
if (r != S_OK) |
goto fail1; |
|
buf = dup_wchar_to_utf8(var.bstrVal); |
|
if (pfilter) { |
if (strcmp(device_name, buf)) |
goto fail1; |
|
if (!skip--) |
IMoniker_BindToObject(m, 0, 0, &IID_IBaseFilter, (void *) &device_filter); |
} else { |
av_log(avctx, AV_LOG_INFO, " \"%s\"\n", buf); |
} |
|
fail1: |
if (buf) |
av_free(buf); |
if (bag) |
IPropertyBag_Release(bag); |
IMoniker_Release(m); |
} |
|
IEnumMoniker_Release(classenum); |
|
if (pfilter) { |
if (!device_filter) { |
av_log(avctx, AV_LOG_ERROR, "Could not find %s device.\n", |
devtypename); |
return AVERROR(EIO); |
} |
*pfilter = device_filter; |
} |
|
return 0; |
} |
|
/** |
* Cycle through available formats using the specified pin, |
* try to set parameters specified through AVOptions and if successful |
* return 1 in *pformat_set. |
* If pformat_set is NULL, list all pin capabilities. |
*/ |
static void |
dshow_cycle_formats(AVFormatContext *avctx, enum dshowDeviceType devtype, |
IPin *pin, int *pformat_set) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
IAMStreamConfig *config = NULL; |
AM_MEDIA_TYPE *type = NULL; |
int format_set = 0; |
void *caps = NULL; |
int i, n, size; |
|
if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK) |
return; |
if (IAMStreamConfig_GetNumberOfCapabilities(config, &n, &size) != S_OK) |
goto end; |
|
caps = av_malloc(size); |
if (!caps) |
goto end; |
|
for (i = 0; i < n && !format_set; i++) { |
IAMStreamConfig_GetStreamCaps(config, i, &type, (void *) caps); |
|
#if DSHOWDEBUG |
ff_print_AM_MEDIA_TYPE(type); |
#endif |
|
if (devtype == VideoDevice) { |
VIDEO_STREAM_CONFIG_CAPS *vcaps = caps; |
BITMAPINFOHEADER *bih; |
int64_t *fr; |
#if DSHOWDEBUG |
ff_print_VIDEO_STREAM_CONFIG_CAPS(vcaps); |
#endif |
if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo)) { |
VIDEOINFOHEADER *v = (void *) type->pbFormat; |
fr = &v->AvgTimePerFrame; |
bih = &v->bmiHeader; |
} else if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo2)) { |
VIDEOINFOHEADER2 *v = (void *) type->pbFormat; |
fr = &v->AvgTimePerFrame; |
bih = &v->bmiHeader; |
} else { |
goto next; |
} |
if (!pformat_set) { |
enum AVPixelFormat pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount); |
if (pix_fmt == AV_PIX_FMT_NONE) { |
enum AVCodecID codec_id = ff_codec_get_id(avformat_get_riff_video_tags(), bih->biCompression); |
AVCodec *codec = avcodec_find_decoder(codec_id); |
if (codec_id == AV_CODEC_ID_NONE || !codec) { |
av_log(avctx, AV_LOG_INFO, " unknown compression type 0x%X", (int) bih->biCompression); |
} else { |
av_log(avctx, AV_LOG_INFO, " vcodec=%s", codec->name); |
} |
} else { |
av_log(avctx, AV_LOG_INFO, " pixel_format=%s", av_get_pix_fmt_name(pix_fmt)); |
} |
av_log(avctx, AV_LOG_INFO, " min s=%ldx%ld fps=%g max s=%ldx%ld fps=%g\n", |
vcaps->MinOutputSize.cx, vcaps->MinOutputSize.cy, |
1e7 / vcaps->MaxFrameInterval, |
vcaps->MaxOutputSize.cx, vcaps->MaxOutputSize.cy, |
1e7 / vcaps->MinFrameInterval); |
continue; |
} |
if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) { |
if (ctx->video_codec_id != ff_codec_get_id(avformat_get_riff_video_tags(), bih->biCompression)) |
goto next; |
} |
if (ctx->pixel_format != AV_PIX_FMT_NONE && |
ctx->pixel_format != dshow_pixfmt(bih->biCompression, bih->biBitCount)) { |
goto next; |
} |
if (ctx->framerate) { |
int64_t framerate = ((int64_t) ctx->requested_framerate.den*10000000) |
/ ctx->requested_framerate.num; |
if (framerate > vcaps->MaxFrameInterval || |
framerate < vcaps->MinFrameInterval) |
goto next; |
*fr = framerate; |
} |
if (ctx->requested_width && ctx->requested_height) { |
if (ctx->requested_width > vcaps->MaxOutputSize.cx || |
ctx->requested_width < vcaps->MinOutputSize.cx || |
ctx->requested_height > vcaps->MaxOutputSize.cy || |
ctx->requested_height < vcaps->MinOutputSize.cy) |
goto next; |
bih->biWidth = ctx->requested_width; |
bih->biHeight = ctx->requested_height; |
} |
} else { |
AUDIO_STREAM_CONFIG_CAPS *acaps = caps; |
WAVEFORMATEX *fx; |
#if DSHOWDEBUG |
ff_print_AUDIO_STREAM_CONFIG_CAPS(acaps); |
#endif |
if (IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) { |
fx = (void *) type->pbFormat; |
} else { |
goto next; |
} |
if (!pformat_set) { |
av_log(avctx, AV_LOG_INFO, " min ch=%lu bits=%lu rate=%6lu max ch=%lu bits=%lu rate=%6lu\n", |
acaps->MinimumChannels, acaps->MinimumBitsPerSample, acaps->MinimumSampleFrequency, |
acaps->MaximumChannels, acaps->MaximumBitsPerSample, acaps->MaximumSampleFrequency); |
continue; |
} |
if (ctx->sample_rate) { |
if (ctx->sample_rate > acaps->MaximumSampleFrequency || |
ctx->sample_rate < acaps->MinimumSampleFrequency) |
goto next; |
fx->nSamplesPerSec = ctx->sample_rate; |
} |
if (ctx->sample_size) { |
if (ctx->sample_size > acaps->MaximumBitsPerSample || |
ctx->sample_size < acaps->MinimumBitsPerSample) |
goto next; |
fx->wBitsPerSample = ctx->sample_size; |
} |
if (ctx->channels) { |
if (ctx->channels > acaps->MaximumChannels || |
ctx->channels < acaps->MinimumChannels) |
goto next; |
fx->nChannels = ctx->channels; |
} |
} |
if (IAMStreamConfig_SetFormat(config, type) != S_OK) |
goto next; |
format_set = 1; |
next: |
if (type->pbFormat) |
CoTaskMemFree(type->pbFormat); |
CoTaskMemFree(type); |
} |
end: |
IAMStreamConfig_Release(config); |
if (caps) |
av_free(caps); |
if (pformat_set) |
*pformat_set = format_set; |
} |
|
/** |
* Set audio device buffer size in milliseconds (which can directly impact |
* latency, depending on the device). |
*/ |
static int |
dshow_set_audio_buffer_size(AVFormatContext *avctx, IPin *pin) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
IAMBufferNegotiation *buffer_negotiation = NULL; |
ALLOCATOR_PROPERTIES props = { -1, -1, -1, -1 }; |
IAMStreamConfig *config = NULL; |
AM_MEDIA_TYPE *type = NULL; |
int ret = AVERROR(EIO); |
|
if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK) |
goto end; |
if (IAMStreamConfig_GetFormat(config, &type) != S_OK) |
goto end; |
if (!IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) |
goto end; |
|
props.cbBuffer = (((WAVEFORMATEX *) type->pbFormat)->nAvgBytesPerSec) |
* ctx->audio_buffer_size / 1000; |
|
if (IPin_QueryInterface(pin, &IID_IAMBufferNegotiation, (void **) &buffer_negotiation) != S_OK) |
goto end; |
if (IAMBufferNegotiation_SuggestAllocatorProperties(buffer_negotiation, &props) != S_OK) |
goto end; |
|
ret = 0; |
|
end: |
if (buffer_negotiation) |
IAMBufferNegotiation_Release(buffer_negotiation); |
if (type) { |
if (type->pbFormat) |
CoTaskMemFree(type->pbFormat); |
CoTaskMemFree(type); |
} |
if (config) |
IAMStreamConfig_Release(config); |
|
return ret; |
} |
|
/** |
* Cycle through available pins using the device_filter device, of type |
* devtype, retrieve the first output pin and return the pointer to the |
* object found in *ppin. |
* If ppin is NULL, cycle through all pins listing audio/video capabilities. |
*/ |
static int |
dshow_cycle_pins(AVFormatContext *avctx, enum dshowDeviceType devtype, |
IBaseFilter *device_filter, IPin **ppin) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
IEnumPins *pins = 0; |
IPin *device_pin = NULL; |
IPin *pin; |
int r; |
|
const GUID *mediatype[2] = { &MEDIATYPE_Video, &MEDIATYPE_Audio }; |
const char *devtypename = (devtype == VideoDevice) ? "video" : "audio"; |
|
int set_format = (devtype == VideoDevice && (ctx->framerate || |
(ctx->requested_width && ctx->requested_height) || |
ctx->pixel_format != AV_PIX_FMT_NONE || |
ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO)) |
|| (devtype == AudioDevice && (ctx->channels || ctx->sample_rate)); |
int format_set = 0; |
|
r = IBaseFilter_EnumPins(device_filter, &pins); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not enumerate pins.\n"); |
return AVERROR(EIO); |
} |
|
if (!ppin) { |
av_log(avctx, AV_LOG_INFO, "DirectShow %s device options\n", |
devtypename); |
} |
while (!device_pin && IEnumPins_Next(pins, 1, &pin, NULL) == S_OK) { |
IKsPropertySet *p = NULL; |
IEnumMediaTypes *types = NULL; |
PIN_INFO info = {0}; |
AM_MEDIA_TYPE *type; |
GUID category; |
DWORD r2; |
|
IPin_QueryPinInfo(pin, &info); |
IBaseFilter_Release(info.pFilter); |
|
if (info.dir != PINDIR_OUTPUT) |
goto next; |
if (IPin_QueryInterface(pin, &IID_IKsPropertySet, (void **) &p) != S_OK) |
goto next; |
if (IKsPropertySet_Get(p, &ROPSETID_Pin, AMPROPERTY_PIN_CATEGORY, |
NULL, 0, &category, sizeof(GUID), &r2) != S_OK) |
goto next; |
if (!IsEqualGUID(&category, &PIN_CATEGORY_CAPTURE)) |
goto next; |
|
if (!ppin) { |
char *buf = dup_wchar_to_utf8(info.achName); |
av_log(avctx, AV_LOG_INFO, " Pin \"%s\"\n", buf); |
av_free(buf); |
dshow_cycle_formats(avctx, devtype, pin, NULL); |
goto next; |
} |
if (set_format) { |
dshow_cycle_formats(avctx, devtype, pin, &format_set); |
if (!format_set) { |
goto next; |
} |
} |
if (devtype == AudioDevice && ctx->audio_buffer_size) { |
if (dshow_set_audio_buffer_size(avctx, pin) < 0) |
goto next; |
} |
|
if (IPin_EnumMediaTypes(pin, &types) != S_OK) |
goto next; |
|
IEnumMediaTypes_Reset(types); |
while (!device_pin && IEnumMediaTypes_Next(types, 1, &type, NULL) == S_OK) { |
if (IsEqualGUID(&type->majortype, mediatype[devtype])) { |
device_pin = pin; |
goto next; |
} |
CoTaskMemFree(type); |
} |
|
next: |
if (types) |
IEnumMediaTypes_Release(types); |
if (p) |
IKsPropertySet_Release(p); |
if (device_pin != pin) |
IPin_Release(pin); |
} |
|
IEnumPins_Release(pins); |
|
if (ppin) { |
if (set_format && !format_set) { |
av_log(avctx, AV_LOG_ERROR, "Could not set %s options\n", devtypename); |
return AVERROR(EIO); |
} |
if (!device_pin) { |
av_log(avctx, AV_LOG_ERROR, |
"Could not find output pin from %s capture device.\n", devtypename); |
return AVERROR(EIO); |
} |
*ppin = device_pin; |
} |
|
return 0; |
} |
|
/** |
* List options for device with type devtype. |
* |
* @param devenum device enumerator used for accessing the device |
*/ |
static int |
dshow_list_device_options(AVFormatContext *avctx, ICreateDevEnum *devenum, |
enum dshowDeviceType devtype) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
IBaseFilter *device_filter = NULL; |
int r; |
|
if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0) |
return r; |
ctx->device_filter[devtype] = device_filter; |
if ((r = dshow_cycle_pins(avctx, devtype, device_filter, NULL)) < 0) |
return r; |
|
return 0; |
} |
|
static int |
dshow_open_device(AVFormatContext *avctx, ICreateDevEnum *devenum, |
enum dshowDeviceType devtype) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
IBaseFilter *device_filter = NULL; |
IGraphBuilder *graph = ctx->graph; |
IPin *device_pin = NULL; |
libAVPin *capture_pin = NULL; |
libAVFilter *capture_filter = NULL; |
int ret = AVERROR(EIO); |
int r; |
|
const wchar_t *filter_name[2] = { L"Audio capture filter", L"Video capture filter" }; |
|
if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0) { |
ret = r; |
goto error; |
} |
|
ctx->device_filter [devtype] = device_filter; |
|
r = IGraphBuilder_AddFilter(graph, device_filter, NULL); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not add device filter to graph.\n"); |
goto error; |
} |
|
if ((r = dshow_cycle_pins(avctx, devtype, device_filter, &device_pin)) < 0) { |
ret = r; |
goto error; |
} |
ctx->device_pin[devtype] = device_pin; |
|
capture_filter = libAVFilter_Create(avctx, callback, devtype); |
if (!capture_filter) { |
av_log(avctx, AV_LOG_ERROR, "Could not create grabber filter.\n"); |
goto error; |
} |
ctx->capture_filter[devtype] = capture_filter; |
|
r = IGraphBuilder_AddFilter(graph, (IBaseFilter *) capture_filter, |
filter_name[devtype]); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not add capture filter to graph\n"); |
goto error; |
} |
|
libAVPin_AddRef(capture_filter->pin); |
capture_pin = capture_filter->pin; |
ctx->capture_pin[devtype] = capture_pin; |
|
r = IGraphBuilder_ConnectDirect(graph, device_pin, (IPin *) capture_pin, NULL); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not connect pins\n"); |
goto error; |
} |
|
ret = 0; |
|
error: |
return ret; |
} |
|
static enum AVCodecID waveform_codec_id(enum AVSampleFormat sample_fmt) |
{ |
switch (sample_fmt) { |
case AV_SAMPLE_FMT_U8: return AV_CODEC_ID_PCM_U8; |
case AV_SAMPLE_FMT_S16: return AV_CODEC_ID_PCM_S16LE; |
case AV_SAMPLE_FMT_S32: return AV_CODEC_ID_PCM_S32LE; |
default: return AV_CODEC_ID_NONE; /* Should never happen. */ |
} |
} |
|
static enum AVSampleFormat sample_fmt_bits_per_sample(int bits) |
{ |
switch (bits) { |
case 8: return AV_SAMPLE_FMT_U8; |
case 16: return AV_SAMPLE_FMT_S16; |
case 32: return AV_SAMPLE_FMT_S32; |
default: return AV_SAMPLE_FMT_NONE; /* Should never happen. */ |
} |
} |
|
static int |
dshow_add_device(AVFormatContext *avctx, |
enum dshowDeviceType devtype) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
AM_MEDIA_TYPE type; |
AVCodecContext *codec; |
AVStream *st; |
int ret = AVERROR(EIO); |
|
st = avformat_new_stream(avctx, NULL); |
if (!st) { |
ret = AVERROR(ENOMEM); |
goto error; |
} |
st->id = devtype; |
|
ctx->capture_filter[devtype]->stream_index = st->index; |
|
libAVPin_ConnectionMediaType(ctx->capture_pin[devtype], &type); |
|
codec = st->codec; |
if (devtype == VideoDevice) { |
BITMAPINFOHEADER *bih = NULL; |
AVRational time_base; |
|
if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo)) { |
VIDEOINFOHEADER *v = (void *) type.pbFormat; |
time_base = (AVRational) { v->AvgTimePerFrame, 10000000 }; |
bih = &v->bmiHeader; |
} else if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo2)) { |
VIDEOINFOHEADER2 *v = (void *) type.pbFormat; |
time_base = (AVRational) { v->AvgTimePerFrame, 10000000 }; |
bih = &v->bmiHeader; |
} |
if (!bih) { |
av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n"); |
goto error; |
} |
|
codec->time_base = time_base; |
codec->codec_type = AVMEDIA_TYPE_VIDEO; |
codec->width = bih->biWidth; |
codec->height = bih->biHeight; |
codec->pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount); |
if (bih->biCompression == MKTAG('H', 'D', 'Y', 'C')) { |
av_log(avctx, AV_LOG_DEBUG, "attempt to use full range for HDYC...\n"); |
codec->color_range = AVCOL_RANGE_MPEG; // just in case it needs this... |
} |
if (codec->pix_fmt == AV_PIX_FMT_NONE) { |
codec->codec_id = ff_codec_get_id(avformat_get_riff_video_tags(), bih->biCompression); |
if (codec->codec_id == AV_CODEC_ID_NONE) { |
av_log(avctx, AV_LOG_ERROR, "Unknown compression type. " |
"Please report type 0x%X.\n", (int) bih->biCompression); |
return AVERROR_PATCHWELCOME; |
} |
codec->bits_per_coded_sample = bih->biBitCount; |
} else { |
codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
if (bih->biCompression == BI_RGB || bih->biCompression == BI_BITFIELDS) { |
codec->bits_per_coded_sample = bih->biBitCount; |
codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE); |
if (codec->extradata) { |
codec->extradata_size = 9; |
memcpy(codec->extradata, "BottomUp", 9); |
} |
} |
} |
} else { |
WAVEFORMATEX *fx = NULL; |
|
if (IsEqualGUID(&type.formattype, &FORMAT_WaveFormatEx)) { |
fx = (void *) type.pbFormat; |
} |
if (!fx) { |
av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n"); |
goto error; |
} |
|
codec->codec_type = AVMEDIA_TYPE_AUDIO; |
codec->sample_fmt = sample_fmt_bits_per_sample(fx->wBitsPerSample); |
codec->codec_id = waveform_codec_id(codec->sample_fmt); |
codec->sample_rate = fx->nSamplesPerSec; |
codec->channels = fx->nChannels; |
} |
|
avpriv_set_pts_info(st, 64, 1, 10000000); |
|
ret = 0; |
|
error: |
return ret; |
} |
|
static int parse_device_name(AVFormatContext *avctx) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
char **device_name = ctx->device_name; |
char *name = av_strdup(avctx->filename); |
char *tmp = name; |
int ret = 1; |
char *type; |
|
while ((type = strtok(tmp, "="))) { |
char *token = strtok(NULL, ":"); |
tmp = NULL; |
|
if (!strcmp(type, "video")) { |
device_name[0] = token; |
} else if (!strcmp(type, "audio")) { |
device_name[1] = token; |
} else { |
device_name[0] = NULL; |
device_name[1] = NULL; |
break; |
} |
} |
|
if (!device_name[0] && !device_name[1]) { |
ret = 0; |
} else { |
if (device_name[0]) |
device_name[0] = av_strdup(device_name[0]); |
if (device_name[1]) |
device_name[1] = av_strdup(device_name[1]); |
} |
|
av_free(name); |
return ret; |
} |
|
static int dshow_read_header(AVFormatContext *avctx) |
{ |
struct dshow_ctx *ctx = avctx->priv_data; |
IGraphBuilder *graph = NULL; |
ICreateDevEnum *devenum = NULL; |
IMediaControl *control = NULL; |
IMediaEvent *media_event = NULL; |
HANDLE media_event_handle; |
HANDLE proc; |
int ret = AVERROR(EIO); |
int r; |
|
CoInitialize(0); |
|
if (!ctx->list_devices && !parse_device_name(avctx)) { |
av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n"); |
goto error; |
} |
|
ctx->video_codec_id = avctx->video_codec_id ? avctx->video_codec_id |
: AV_CODEC_ID_RAWVIDEO; |
if (ctx->pixel_format != AV_PIX_FMT_NONE) { |
if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) { |
av_log(avctx, AV_LOG_ERROR, "Pixel format may only be set when " |
"video codec is not set or set to rawvideo\n"); |
ret = AVERROR(EINVAL); |
goto error; |
} |
} |
if (ctx->framerate) { |
r = av_parse_video_rate(&ctx->requested_framerate, ctx->framerate); |
if (r < 0) { |
av_log(avctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate); |
goto error; |
} |
} |
|
r = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, |
&IID_IGraphBuilder, (void **) &graph); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not create capture graph.\n"); |
goto error; |
} |
ctx->graph = graph; |
|
r = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, |
&IID_ICreateDevEnum, (void **) &devenum); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not enumerate system devices.\n"); |
goto error; |
} |
|
if (ctx->list_devices) { |
av_log(avctx, AV_LOG_INFO, "DirectShow video devices\n"); |
dshow_cycle_devices(avctx, devenum, VideoDevice, NULL); |
av_log(avctx, AV_LOG_INFO, "DirectShow audio devices\n"); |
dshow_cycle_devices(avctx, devenum, AudioDevice, NULL); |
ret = AVERROR_EXIT; |
goto error; |
} |
if (ctx->list_options) { |
if (ctx->device_name[VideoDevice]) |
dshow_list_device_options(avctx, devenum, VideoDevice); |
if (ctx->device_name[AudioDevice]) |
dshow_list_device_options(avctx, devenum, AudioDevice); |
ret = AVERROR_EXIT; |
goto error; |
} |
|
if (ctx->device_name[VideoDevice]) { |
if ((r = dshow_open_device(avctx, devenum, VideoDevice)) < 0 || |
(r = dshow_add_device(avctx, VideoDevice)) < 0) { |
ret = r; |
goto error; |
} |
} |
if (ctx->device_name[AudioDevice]) { |
if ((r = dshow_open_device(avctx, devenum, AudioDevice)) < 0 || |
(r = dshow_add_device(avctx, AudioDevice)) < 0) { |
ret = r; |
goto error; |
} |
} |
|
ctx->mutex = CreateMutex(NULL, 0, NULL); |
if (!ctx->mutex) { |
av_log(avctx, AV_LOG_ERROR, "Could not create Mutex\n"); |
goto error; |
} |
ctx->event[1] = CreateEvent(NULL, 1, 0, NULL); |
if (!ctx->event[1]) { |
av_log(avctx, AV_LOG_ERROR, "Could not create Event\n"); |
goto error; |
} |
|
r = IGraphBuilder_QueryInterface(graph, &IID_IMediaControl, (void **) &control); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not get media control.\n"); |
goto error; |
} |
ctx->control = control; |
|
r = IGraphBuilder_QueryInterface(graph, &IID_IMediaEvent, (void **) &media_event); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not get media event.\n"); |
goto error; |
} |
ctx->media_event = media_event; |
|
r = IMediaEvent_GetEventHandle(media_event, (void *) &media_event_handle); |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not get media event handle.\n"); |
goto error; |
} |
proc = GetCurrentProcess(); |
r = DuplicateHandle(proc, media_event_handle, proc, &ctx->event[0], |
0, 0, DUPLICATE_SAME_ACCESS); |
if (!r) { |
av_log(avctx, AV_LOG_ERROR, "Could not duplicate media event handle.\n"); |
goto error; |
} |
|
r = IMediaControl_Run(control); |
if (r == S_FALSE) { |
OAFilterState pfs; |
r = IMediaControl_GetState(control, 0, &pfs); |
} |
if (r != S_OK) { |
av_log(avctx, AV_LOG_ERROR, "Could not run filter\n"); |
goto error; |
} |
|
ret = 0; |
|
error: |
|
if (devenum) |
ICreateDevEnum_Release(devenum); |
|
if (ret < 0) |
dshow_read_close(avctx); |
|
return ret; |
} |
|
/** |
* Checks media events from DirectShow and returns -1 on error or EOF. Also |
* purges all events that might be in the event queue to stop the trigger |
* of event notification. |
*/ |
static int dshow_check_event_queue(IMediaEvent *media_event) |
{ |
LONG_PTR p1, p2; |
long code; |
int ret = 0; |
|
while (IMediaEvent_GetEvent(media_event, &code, &p1, &p2, 0) != E_ABORT) { |
if (code == EC_COMPLETE || code == EC_DEVICE_LOST || code == EC_ERRORABORT) |
ret = -1; |
IMediaEvent_FreeEventParams(media_event, code, p1, p2); |
} |
|
return ret; |
} |
|
static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt) |
{ |
struct dshow_ctx *ctx = s->priv_data; |
AVPacketList *pktl = NULL; |
|
while (!ctx->eof && !pktl) { |
WaitForSingleObject(ctx->mutex, INFINITE); |
pktl = ctx->pktl; |
if (pktl) { |
*pkt = pktl->pkt; |
ctx->pktl = ctx->pktl->next; |
av_free(pktl); |
ctx->curbufsize -= pkt->size; |
} |
ResetEvent(ctx->event[1]); |
ReleaseMutex(ctx->mutex); |
if (!pktl) { |
if (dshow_check_event_queue(ctx->media_event) < 0) { |
ctx->eof = 1; |
} else if (s->flags & AVFMT_FLAG_NONBLOCK) { |
return AVERROR(EAGAIN); |
} else { |
WaitForMultipleObjects(2, ctx->event, 0, INFINITE); |
} |
} |
} |
|
return ctx->eof ? AVERROR(EIO) : pkt->size; |
} |
|
#define OFFSET(x) offsetof(struct dshow_ctx, x) |
#define DEC AV_OPT_FLAG_DECODING_PARAM |
static const AVOption options[] = { |
{ "video_size", "set video size given a string such as 640x480 or hd720.", OFFSET(requested_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC }, |
{ "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, AV_PIX_FMT_NB-1, DEC }, |
{ "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, |
{ "sample_rate", "set audio sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
{ "sample_size", "set audio sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 16, DEC }, |
{ "channels", "set number of audio channels, such as 1 or 2", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
{ "list_devices", "list available devices", OFFSET(list_devices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_devices" }, |
{ "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_devices" }, |
{ "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_devices" }, |
{ "list_options", "list available options for specified device", OFFSET(list_options), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_options" }, |
{ "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_options" }, |
{ "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_options" }, |
{ "video_device_number", "set video device number for devices with same name (starts at 0)", OFFSET(video_device_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
{ "audio_device_number", "set audio device number for devices with same name (starts at 0)", OFFSET(audio_device_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
{ "audio_buffer_size", "set audio device buffer latency size in milliseconds (default is the device's default)", OFFSET(audio_buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC }, |
{ NULL }, |
}; |
|
static const AVClass dshow_class = { |
.class_name = "dshow indev", |
.item_name = av_default_item_name, |
.option = options, |
.version = LIBAVUTIL_VERSION_INT, |
}; |
|
AVInputFormat ff_dshow_demuxer = { |
.name = "dshow", |
.long_name = NULL_IF_CONFIG_SMALL("DirectShow capture"), |
.priv_data_size = sizeof(struct dshow_ctx), |
.read_header = dshow_read_header, |
.read_packet = dshow_read_packet, |
.read_close = dshow_read_close, |
.flags = AVFMT_NOFILE, |
.priv_class = &dshow_class, |
}; |