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/*
* Blackmagic DeckLink output
* Copyright (c) 2013-2014 Ramiro Polla, Luca Barbato, Deti Fliegl
*
* 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 <DeckLinkAPI.h>
#ifdef _WIN32
#include <DeckLinkAPI_i.c>
#else
#include <DeckLinkAPIDispatch.cpp>
#endif
extern "C" {
#include "libavformat/internal.h"
#include "libavutil/imgutils.h"
}
#include "decklink_common.h"
#ifdef _WIN32
IDeckLinkIterator *CreateDeckLinkIteratorInstance(void)
{
IDeckLinkIterator *iter;
if (CoInitialize(NULL) < 0) {
av_log(NULL, AV_LOG_ERROR, "COM initialization failed.\n");
return NULL;
}
if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,
IID_IDeckLinkIterator, (void**) &iter) != S_OK) {
av_log(NULL, AV_LOG_ERROR, "DeckLink drivers not installed.\n");
return NULL;
}
return iter;
}
#endif
#ifdef _WIN32
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 = (char *) av_malloc(l);
if (s)
WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
return s;
}
#define DECKLINK_STR OLECHAR *
#define DECKLINK_STRDUP dup_wchar_to_utf8
#define DECKLINK_FREE(s) SysFreeString(s)
#elif defined(__APPLE__)
static char *dup_cfstring_to_utf8(CFStringRef w)
{
char s[256];
CFStringGetCString(w, s, 255, kCFStringEncodingUTF8);
return av_strdup(s);
}
#define DECKLINK_STR const __CFString *
#define DECKLINK_STRDUP dup_cfstring_to_utf8
#define DECKLINK_FREE(s) free((void *) s)
#else
#define DECKLINK_STR const char *
#define DECKLINK_STRDUP av_strdup
/* free() is needed for a string returned by the DeckLink SDL. */
#define DECKLINK_FREE(s) free((void *) s)
#endif
HRESULT ff_decklink_get_display_name(IDeckLink *This, const char **displayName)
{
DECKLINK_STR tmpDisplayName;
HRESULT hr = This->GetDisplayName(&tmpDisplayName);
if (hr != S_OK)
return hr;
*displayName = DECKLINK_STRDUP(tmpDisplayName);
DECKLINK_FREE(tmpDisplayName);
return hr;
}
int ff_decklink_set_format(AVFormatContext *avctx,
int width, int height,
int tb_num, int tb_den,
decklink_direction_t direction, int num)
{
struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
BMDDisplayModeSupport support;
IDeckLinkDisplayModeIterator *itermode;
IDeckLinkDisplayMode *mode;
int i = 1;
HRESULT res;
if (direction == DIRECTION_IN) {
res = ctx->dli->GetDisplayModeIterator (&itermode);
} else {
res = ctx->dlo->GetDisplayModeIterator (&itermode);
}
if (res!= S_OK) {
av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
return AVERROR(EIO);
}
if (tb_num == 1) {
tb_num *= 1000;
tb_den *= 1000;
}
ctx->bmd_mode = bmdModeUnknown;
while ((ctx->bmd_mode == bmdModeUnknown) && itermode->Next(&mode) == S_OK) {
BMDTimeValue bmd_tb_num, bmd_tb_den;
int bmd_width = mode->GetWidth();
int bmd_height = mode->GetHeight();
mode->GetFrameRate(&bmd_tb_num, &bmd_tb_den);
if ((bmd_width == width && bmd_height == height &&
bmd_tb_num == tb_num && bmd_tb_den == tb_den) || i == num) {
ctx->bmd_mode = mode->GetDisplayMode();
ctx->bmd_width = bmd_width;
ctx->bmd_height = bmd_height;
ctx->bmd_tb_den = bmd_tb_den;
ctx->bmd_tb_num = bmd_tb_num;
ctx->bmd_field_dominance = mode->GetFieldDominance();
av_log(avctx, AV_LOG_INFO, "Found Decklink mode %d x %d with rate %.2f%s\n",
bmd_width, bmd_height, (float)bmd_tb_den/(float)bmd_tb_num,
(ctx->bmd_field_dominance==bmdLowerFieldFirst || ctx->bmd_field_dominance==bmdUpperFieldFirst)?"(i)":"");
}
mode->Release();
i++;
}
itermode->Release();
if (ctx->bmd_mode == bmdModeUnknown)
return -1;
if (direction == DIRECTION_IN) {
if (ctx->dli->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
bmdVideoOutputFlagDefault,
&support, NULL) != S_OK)
return -1;
} else {
if (ctx->dlo->DoesSupportVideoMode(ctx->bmd_mode, bmdFormat8BitYUV,
bmdVideoOutputFlagDefault,
&support, NULL) != S_OK)
return -1;
}
if (support == bmdDisplayModeSupported)
return 0;
return -1;
}
int ff_decklink_set_format(AVFormatContext *avctx, decklink_direction_t direction, int num) {
return ff_decklink_set_format(avctx, 0, 0, 0, 0, direction, num);
}
int ff_decklink_list_devices(AVFormatContext *avctx)
{
IDeckLink *dl = NULL;
IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
if (!iter) {
av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
return AVERROR(EIO);
}
av_log(avctx, AV_LOG_INFO, "Blackmagic DeckLink devices:\n");
while (iter->Next(&dl) == S_OK) {
const char *displayName;
ff_decklink_get_display_name(dl, &displayName);
av_log(avctx, AV_LOG_INFO, "\t'%s'\n", displayName);
av_free((void *) displayName);
dl->Release();
}
iter->Release();
return 0;
}
int ff_decklink_list_formats(AVFormatContext *avctx, decklink_direction_t direction)
{
struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
IDeckLinkDisplayModeIterator *itermode;
IDeckLinkDisplayMode *mode;
int i=0;
HRESULT res;
if (direction == DIRECTION_IN) {
res = ctx->dli->GetDisplayModeIterator (&itermode);
} else {
res = ctx->dlo->GetDisplayModeIterator (&itermode);
}
if (res!= S_OK) {
av_log(avctx, AV_LOG_ERROR, "Could not get Display Mode Iterator\n");
return AVERROR(EIO);
}
av_log(avctx, AV_LOG_INFO, "Supported formats for '%s':\n",
avctx->filename);
while (itermode->Next(&mode) == S_OK) {
BMDTimeValue tb_num, tb_den;
mode->GetFrameRate(&tb_num, &tb_den);
av_log(avctx, AV_LOG_INFO, "\t%d\t%ldx%ld at %d/%d fps",
++i,mode->GetWidth(), mode->GetHeight(),
(int) tb_den, (int) tb_num);
switch (mode->GetFieldDominance()) {
case bmdLowerFieldFirst:
av_log(avctx, AV_LOG_INFO, " (interlaced, lower field first)"); break;
case bmdUpperFieldFirst:
av_log(avctx, AV_LOG_INFO, " (interlaced, upper field first)"); break;
}
av_log(avctx, AV_LOG_INFO, "\n");
mode->Release();
}
itermode->Release();
return 0;
}
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