avdevice/decklink: move general code of decklink encoder to common file

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 229 insertions, 0 deletions

diff --git a/libavdevice/decklink_common.cpp b/libavdevice/decklink_common.cpp
new file mode 100644
index 0000000000..9a9e44bf3c
--- /dev/null
+++ b/libavdevice/decklink_common.cpp
@@ -0,0 +1,229 @@
+/*
+ * 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
+
+#include <pthread.h>
+#include <semaphore.h>
+
+extern "C" {
+#include "libavformat/avformat.h"
+#include "libavformat/internal.h"
+#include "libavutil/imgutils.h"
+}
+
+#include "decklink_common.h"
+
+#ifdef _WIN32
+IDeckLinkIterator *CreateDeckLinkIteratorInstance(void)
+{
+    IDeckLinkIterator *iter;
+
+    if (CoInitialize(NULL) != S_OK) {
+        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
+#else
+#define DECKLINK_STR    const char *
+#define DECKLINK_STRDUP av_strdup
+#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);
+    /* free() is needed for a string returned by the DeckLink SDL. */
+    free((void *) 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;
+}