mirror of https://git.ffmpeg.org/ffmpeg.git
238 lines
7.5 KiB
C++
238 lines
7.5 KiB
C++
/*
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* Blackmagic DeckLink output
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* Copyright (c) 2013-2014 Ramiro Polla, Luca Barbato, Deti Fliegl
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <DeckLinkAPI.h>
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#ifdef _WIN32
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#include <DeckLinkAPI_i.c>
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#else
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#include <DeckLinkAPIDispatch.cpp>
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#endif
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extern "C" {
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#include "libavformat/internal.h"
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#include "libavutil/imgutils.h"
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}
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#include "decklink_common.h"
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#ifdef _WIN32
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IDeckLinkIterator *CreateDeckLinkIteratorInstance(void)
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{
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IDeckLinkIterator *iter;
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if (CoInitialize(NULL) < 0) {
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av_log(NULL, AV_LOG_ERROR, "COM initialization failed.\n");
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return NULL;
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}
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if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,
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IID_IDeckLinkIterator, (void**) &iter) != S_OK) {
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av_log(NULL, AV_LOG_ERROR, "DeckLink drivers not installed.\n");
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return NULL;
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}
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return iter;
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}
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#endif
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#ifdef _WIN32
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static char *dup_wchar_to_utf8(wchar_t *w)
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{
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char *s = NULL;
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int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);
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s = (char *) av_malloc(l);
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if (s)
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WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
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return s;
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}
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#define DECKLINK_STR OLECHAR *
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#define DECKLINK_STRDUP dup_wchar_to_utf8
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#define DECKLINK_FREE(s) SysFreeString(s)
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#elif defined(__APPLE__)
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static char *dup_cfstring_to_utf8(CFStringRef w)
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{
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char s[256];
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CFStringGetCString(w, s, 255, kCFStringEncodingUTF8);
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return av_strdup(s);
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}
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#define DECKLINK_STR const __CFString *
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#define DECKLINK_STRDUP dup_cfstring_to_utf8
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#define DECKLINK_FREE(s) free((void *) s)
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#else
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#define DECKLINK_STR const char *
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#define DECKLINK_STRDUP av_strdup
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/* free() is needed for a string returned by the DeckLink SDL. */
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#define DECKLINK_FREE(s) free((void *) s)
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#endif
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HRESULT ff_decklink_get_display_name(IDeckLink *This, const char **displayName)
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{
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DECKLINK_STR tmpDisplayName;
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HRESULT hr = This->GetDisplayName(&tmpDisplayName);
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if (hr != S_OK)
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return hr;
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*displayName = DECKLINK_STRDUP(tmpDisplayName);
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DECKLINK_FREE(tmpDisplayName);
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return hr;
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}
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int ff_decklink_set_format(AVFormatContext *avctx,
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int width, int height,
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int tb_num, int tb_den,
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decklink_direction_t direction, int num)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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BMDDisplayModeSupport support;
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IDeckLinkDisplayModeIterator *itermode;
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IDeckLinkDisplayMode *mode;
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int i = 1;
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HRESULT res;
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if (direction == DIRECTION_IN) {
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res = ctx->dli->GetDisplayModeIterator (&itermode);
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} else {
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res = ctx->dlo->GetDisplayModeIterator (&itermode);
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}
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if (res!= S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
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return AVERROR(EIO);
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}
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if (tb_num == 1) {
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tb_num *= 1000;
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tb_den *= 1000;
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}
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ctx->bmd_mode = bmdModeUnknown;
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while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
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BMDTimeValue bmd_tb_num, bmd_tb_den;
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int bmd_width = mode->GetWidth();
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int bmd_height = mode->GetHeight();
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mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
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if ((bmd_width == width && bmd_height == height &&
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bmd_tb_num == tb_num && bmd_tb_den == tb_den) || i == num) {
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ctx->bmd_mode = mode->GetDisplayMode();
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ctx->bmd_width = bmd_width;
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ctx->bmd_height = bmd_height;
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ctx->bmd_tb_den = bmd_tb_den;
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ctx->bmd_tb_num = bmd_tb_num;
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ctx->bmd_field_dominance = mode->GetFieldDominance();
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av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
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bmd_width, bmd_height, (float)bmd_tb_den/(float)bmd_tb_num,
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(ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
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}
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mode->Release();
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i++;
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}
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itermode->Release();
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if (ctx->bmd_mode == bmdModeUnknown)
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return -1;
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if (direction == DIRECTION_IN) {
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if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
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bmdVideoOutputFlagDefault,
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&support, NULL) != S_OK)
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return -1;
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} else {
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if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
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bmdVideoOutputFlagDefault,
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&support, NULL) != S_OK)
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return -1;
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}
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if (support == bmdDisplayModeSupported)
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return 0;
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return -1;
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}
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int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction, int num) {
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return ff_decklink_set_format(avctx, 0, 0, 0, 0, direction, num);
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}
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int ff_decklink_list_devices(AVFormatContext *avctx)
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{
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IDeckLink *dl = NULL;
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IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
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if (!iter) {
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av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
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return AVERROR(EIO);
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}
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av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink devices:\n");
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while (iter->Next(&dl) == S_OK) {
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const char *displayName;
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ff_decklink_get_display_name(dl, &displayName);
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av_log(avctx, AV_LOG_INFO, "\t'%s'\n", displayName);
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av_free((void *) displayName);
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dl->Release();
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}
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iter->Release();
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return 0;
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}
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int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)
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{
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struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
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struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
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IDeckLinkDisplayModeIterator *itermode;
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IDeckLinkDisplayMode *mode;
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int i=0;
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HRESULT res;
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if (direction == DIRECTION_IN) {
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res = ctx->dli->GetDisplayModeIterator (&itermode);
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} else {
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res = ctx->dlo->GetDisplayModeIterator (&itermode);
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}
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if (res!= S_OK) {
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av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
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return AVERROR(EIO);
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}
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av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n",
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avctx->filename);
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while (itermode->Next(&mode) == S_OK) {
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BMDTimeValue tb_num, tb_den;
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mode->GetFrameRate(&tb_num, &tb_den);
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av_log(avctx, AV_LOG_INFO, "\t%d\t%ldx%ld at %d/%d fps",
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++i,mode->GetWidth(), mode->GetHeight(),
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(int) tb_den, (int) tb_num);
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switch (mode->GetFieldDominance()) {
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case bmdLowerFieldFirst:
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av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
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case bmdUpperFieldFirst:
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av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
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}
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av_log(avctx, AV_LOG_INFO, "\n");
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mode->Release();
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}
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itermode->Release();
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return 0;
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}
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