diff options
Diffstat (limited to 'libavdevice/dshow.c')
| -rw-r--r-- | libavdevice/dshow.c | 975 |
1 files changed, 975 insertions, 0 deletions
diff --git a/libavdevice/dshow.c b/libavdevice/dshow.c new file mode 100644 index 0000000000..21e275dd50 --- /dev/null +++ b/libavdevice/dshow.c @@ -0,0 +1,975 @@ +/* + * 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/opt.h" +#include "libavformat/internal.h" +#include "avdevice.h" +#include "dshow.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; + + IBaseFilter *device_filter[2]; + IPin *device_pin[2]; + libAVFilter *capture_filter[2]; + libAVPin *capture_pin[2]; + + HANDLE mutex; + HANDLE event; + AVPacketList *pktl; + + unsigned int curbufsize; + unsigned int video_frame_num; + + IMediaControl *control; + + char *video_size; + char *framerate; + + int requested_width; + int requested_height; + AVRational requested_framerate; + + int sample_rate; + int sample_size; + int channels; +}; + +static enum PixelFormat dshow_pixfmt(DWORD biCompression, WORD biBitCount) +{ + switch(biCompression) { + case MKTAG('U', 'Y', 'V', 'Y'): + return PIX_FMT_UYVY422; + case MKTAG('Y', 'U', 'Y', '2'): + return PIX_FMT_YUYV422; + case MKTAG('I', '4', '2', '0'): + return PIX_FMT_YUV420P; + case BI_BITFIELDS: + case BI_RGB: + switch(biBitCount) { /* 1-8 are untested */ + case 1: + return PIX_FMT_MONOWHITE; + case 4: + return PIX_FMT_RGB4; + case 8: + return PIX_FMT_RGB8; + case 16: + return PIX_FMT_RGB555; + case 24: + return PIX_FMT_BGR24; + case 32: + return PIX_FMT_RGB32; + } + } + return PIX_FMT_NONE; +} + +static enum CodecID dshow_codecid(DWORD biCompression) +{ + switch(biCompression) { + case MKTAG('d', 'v', 's', 'd'): + return CODEC_ID_DVVIDEO; + case MKTAG('M', 'J', 'P', 'G'): + case MKTAG('m', 'j', 'p', 'g'): + return CODEC_ID_MJPEG; + } + return CODEC_ID_NONE; +} + +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->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) + 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 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; + 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); + + if(shall_we_drop(s)) + return; + + WaitForSingleObject(ctx->mutex, INFINITE); + + 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); + 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) { + 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->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->video_size) { + 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; +} + +/** + * 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->video_size || ctx->framerate)) + || (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 (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 CodecID waveform_codec_id(enum AVSampleFormat sample_fmt) +{ + switch (sample_fmt) { + case AV_SAMPLE_FMT_U8: return CODEC_ID_PCM_U8; + case AV_SAMPLE_FMT_S16: return CODEC_ID_PCM_S16LE; + case AV_SAMPLE_FMT_S32: return CODEC_ID_PCM_S32LE; + default: return 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 (codec->pix_fmt == PIX_FMT_NONE) { + codec->codec_id = dshow_codecid(bih->biCompression); + if (codec->codec_id == CODEC_ID_NONE) { + av_log(avctx, AV_LOG_ERROR, "Unknown compression type. " + "Please report verbose (-v 9) debug information.\n"); + dshow_read_close(avctx); + return AVERROR_PATCHWELCOME; + } + codec->bits_per_coded_sample = bih->biBitCount; + } else { + codec->codec_id = 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; + int ret = AVERROR(EIO); + int r; + + if (!ctx->list_devices && !parse_device_name(avctx)) { + av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n"); + goto error; + } + + if (ctx->video_size) { + r = av_parse_video_size(&ctx->requested_width, &ctx->requested_height, ctx->video_size); + if (r < 0) { + av_log(avctx, AV_LOG_ERROR, "Could not parse video size '%s'.\n", ctx->video_size); + 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; + } + } + + CoInitialize(0); + + 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]) { + ret = dshow_open_device(avctx, devenum, VideoDevice); + if (ret < 0) + goto error; + ret = dshow_add_device(avctx, VideoDevice); + if (ret < 0) + goto error; + } + if (ctx->device_name[AudioDevice]) { + ret = dshow_open_device(avctx, devenum, AudioDevice); + if (ret < 0) + goto error; + ret = dshow_add_device(avctx, AudioDevice); + if (ret < 0) + 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 = CreateEvent(NULL, 1, 0, NULL); + if (!ctx->event) { + 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 = 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 (ret < 0) + dshow_read_close(avctx); + + if (devenum) + ICreateDevEnum_Release(devenum); + + return ret; +} + +static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + struct dshow_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 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(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 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, {.dbl = 0}, 0, INT_MAX, DEC }, + { "sample_size", "set audio sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.dbl = 0}, 0, 16, DEC }, + { "channels", "set number of audio channels, such as 1 or 2", OFFSET(channels), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, DEC }, + { "list_devices", "list available devices", OFFSET(list_devices), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1, DEC, "list_devices" }, + { "true", "", 0, AV_OPT_TYPE_CONST, {.dbl=1}, 0, 0, DEC, "list_devices" }, + { "false", "", 0, AV_OPT_TYPE_CONST, {.dbl=0}, 0, 0, DEC, "list_devices" }, + { "list_options", "list available options for specified device", OFFSET(list_options), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1, DEC, "list_options" }, + { "true", "", 0, AV_OPT_TYPE_CONST, {.dbl=1}, 0, 0, DEC, "list_options" }, + { "false", "", 0, AV_OPT_TYPE_CONST, {.dbl=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, {.dbl = 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, {.dbl = 0}, 0, INT_MAX, DEC }, + { NULL }, +}; + +static const AVClass dshow_class = { + .class_name = "DirectShow 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, +}; |