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FFusionCodec.c
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FFusionCodec.c
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//---------------------------------------------------------------------------
//FFusion
//Alternative DivX Codec for MacOS X
//version 2.2 (build 72)
//by Jerome Cornet
//Copyright 2002-2003 Jerome Cornet
//parts by Dan Christiansen
//Copyright 2003 Dan Christiansen
//from DivOSX by Jamby
//Copyright 2001-2002 Jamby
//uses libavcodec from ffmpeg 0.4.6
//
//This library 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.
//
//This library 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 this library; if not, write to the Free Software
//Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
//---------------------------------------------------------------------------
// Source Code
//---------------------------------------------------------------------------
#include <Carbon/Carbon.h>
#include <QuickTime/QuickTime.h>
#include <Accelerate/Accelerate.h>
#include <sys/sysctl.h>
#include <pthread.h>
#include <libavcodec/avcodec.h>
#include "PerianResourceIDs.h"
#include "Codecprintf.h"
#include "ColorConversions.h"
#include "bitstream_info.h"
#include "FrameBuffer.h"
#include "CommonUtils.h"
#include "CodecIDs.h"
#include "FFmpegUtils.h"
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
// 64 because that's 2 * ffmpeg's INTERNAL_BUFFER_SIZE and QT sometimes uses more than 32
#define FFUSION_MAX_BUFFERS 64
#define kNumPixelFormatsSupportedFFusion 1
typedef struct
{
AVFrame *frame;
AVPicture picture;
int frameNumber;
uint8_t retainCount;
uint8_t ffmpegUsing;
} FFusionBuffer;
typedef enum
{
PACKED_QUICKTIME_KNOWS_ORDER, /* This is for non-stupid container formats which actually know the difference between decode and display order */
PACKED_ALL_IN_FIRST_FRAME, /* This is for the divx hack which contains a P frame and all subsequent B frames in a single frame. Ex: I, PB, -, PB, -, I...*/
PACKED_DELAY_BY_ONE_FRAME /* This is for stupid containers where frames are soley writen in decode order. Ex: I, P, B, P, B, P, I.... */
} FFusionPacked;
/* Why do these small structs? It makes the usage of these variables clearer, no other reason */
/* globs used by the BeginBand routine */
struct begin_glob
{
FFusionParserContext *parser;
int lastFrame;
int lastIFrame;
FrameData *lastPFrameData;
uint8_t lastFrameType;
uint8_t futureType;
};
/* globs used by the DecodeBand routine */
struct decode_glob
{
int lastFrame;
FFusionBuffer *futureBuffer;
};
struct per_frame_decode_stats
{
int begin_calls;
int decode_calls;
int draw_calls;
int end_calls;
};
struct decode_stats
{
struct per_frame_decode_stats type[4];
int max_frames_begun;
int max_frames_decoded;
};
typedef struct
{
ComponentInstance self;
ComponentInstance delegateComponent;
ComponentInstance target;
ImageCodecMPDrawBandUPP drawBandUPP;
Handle pixelTypes;
AVCodec *avCodec;
AVCodecContext *avContext;
OSType componentType;
FILE *fileLog;
AVPicture *lastDisplayedPicture;
FFusionPacked packedType;
FFusionBuffer buffers[FFUSION_MAX_BUFFERS]; // the buffers which the codec has retained
int lastAllocatedBuffer; // the index of the buffer which was last allocated
// by the codec (and is the latest in decode order)
struct begin_glob begin;
FFusionData data;
struct decode_glob decode;
struct decode_stats stats;
CCConverterContext colorConv;
} FFusionGlobalsRecord, *FFusionGlobals;
typedef struct
{
uint8_t decoded;
int frameNumber;
int GOPStartFrameNumber;
int bufferSize;
FFusionBuffer *buffer;
FrameData *frameData;
} FFusionDecompressRecord;
//---------------------------------------------------------------------------
// Prototypes of private subroutines
//---------------------------------------------------------------------------
static OSErr FFusionDecompress(FFusionGlobals glob, AVCodecContext *context, UInt8 *dataPtr, AVFrame *picture, int length);
static int FFusionGetBuffer(AVCodecContext *s, AVFrame *pic);
static void FFusionReleaseBuffer(AVCodecContext *s, AVFrame *pic);
static FFusionBuffer *retainBuffer(FFusionGlobals glob, FFusionBuffer *buf);
static void releaseBuffer(AVCodecContext *s, AVFrame *pic);
extern CFMutableStringRef CopyHomeDirectory();
#define FFusionDebugPrint(x...) if (glob->fileLog) Codecprintf(glob->fileLog, x);
#define not(x) ((x) ? "" : "not ")
//---------------------------------------------------------------------------
// Component Dispatcher
//---------------------------------------------------------------------------
#define IMAGECODEC_BASENAME() FFusionCodec
#define IMAGECODEC_GLOBALS() FFusionGlobals storage
#define CALLCOMPONENT_BASENAME() IMAGECODEC_BASENAME()
#define CALLCOMPONENT_GLOBALS() IMAGECODEC_GLOBALS()
#define COMPONENT_UPP_PREFIX() uppImageCodec
#define COMPONENT_DISPATCH_FILE "FFusionCodecDispatch.h"
#define COMPONENT_SELECT_PREFIX() kImageCodec
#define GET_DELEGATE_COMPONENT() (storage->delegateComponent)
#include <QuickTime/ImageCodec.k.h>
#pragma GCC visibility push(default)
#include <QuickTime/ComponentDispatchHelper.c>
#pragma GCC visibility pop
static void *launchUpdateChecker(void *args)
{
FSRef *ref = (FSRef *)args;
LSOpenFSRef(ref, NULL);
free(ref);
return NULL;
}
Boolean FFusionAlreadyRanUpdateCheck = 0;
void FFusionRunUpdateCheck()
{
if (FFusionAlreadyRanUpdateCheck) return;
CFDateRef lastRunDate = CopyPreferencesValueTyped(CFSTR("NextRunDate"), CFDateGetTypeID());
CFAbsoluteTime now = CFAbsoluteTimeGetCurrent();
FFusionAlreadyRanUpdateCheck = 1;
if (lastRunDate) {
Boolean exit = CFDateGetAbsoluteTime(lastRunDate) > now;
CFRelease(lastRunDate);
if (exit) return;
}
//Two places to check, home dir and /
CFMutableStringRef location = CopyHomeDirectory();
CFStringAppend(location, CFSTR("/Library/PreferencePanes/Perian.prefPane/Contents/Resources/PerianUpdateChecker.app"));
char fileRep[1024];
FSRef *updateCheckRef = malloc(sizeof(FSRef));
Boolean doCheck = FALSE;
if(CFStringGetFileSystemRepresentation(location, fileRep, 1024))
if(FSPathMakeRef((UInt8 *)fileRep, updateCheckRef, NULL) == noErr)
doCheck = TRUE;
CFRelease(location);
if(doCheck == FALSE)
{
CFStringRef absLocation = CFSTR("/Library/PreferencePanes/Perian.prefPane/Contents/Resources/PerianUpdateChecker.app");
if(CFStringGetFileSystemRepresentation(absLocation, fileRep, 1024))
if(FSPathMakeRef((UInt8 *)fileRep, updateCheckRef, NULL) != noErr)
goto err; //We have failed
}
pthread_t thread;
pthread_create(&thread, NULL, launchUpdateChecker, updateCheckRef);
return;
err:
free(updateCheckRef);
}
static void RecomputeMaxCounts(FFusionGlobals glob)
{
int i;
int begun = 0, decoded = 0, ended = 0, drawn = 0;
for (i = 0; i < 4; i++) {
struct per_frame_decode_stats *f = &glob->stats.type[i];
begun += f->begin_calls;
decoded += f->decode_calls;
drawn += f->draw_calls;
ended += f->end_calls;
}
signed begin_diff = begun - ended, decode_diff = decoded - drawn;
if (abs(begin_diff) > glob->stats.max_frames_begun) glob->stats.max_frames_begun = begin_diff;
if (abs(decode_diff) > glob->stats.max_frames_decoded) glob->stats.max_frames_decoded = decode_diff;
}
static void DumpFrameDropStats(FFusionGlobals glob)
{
static const char types[4] = {'?', 'I', 'P', 'B'};
int i;
if (!glob->fileLog || glob->decode.lastFrame == 0) return;
Codecprintf(glob->fileLog, "%p frame drop stats\nType\t| BeginBand\t| DecodeBand\t| DrawBand\t| dropped before decode\t| dropped before draw\n", glob);
for (i = 0; i < 4; i++) {
struct per_frame_decode_stats *f = &glob->stats.type[i];
Codecprintf(glob->fileLog, "%c\t| %d\t\t| %d\t\t| %d\t\t| %d/%f%%\t\t| %d/%f%%\n", types[i], f->begin_calls, f->decode_calls, f->draw_calls,
f->begin_calls - f->decode_calls,(f->begin_calls > f->decode_calls) ? ((float)(f->begin_calls - f->decode_calls)/(float)f->begin_calls) * 100. : 0.,
f->decode_calls - f->draw_calls,(f->decode_calls > f->draw_calls) ? ((float)(f->decode_calls - f->draw_calls)/(float)f->decode_calls) * 100. : 0.);
}
}
static enum PixelFormat FindPixFmtFromVideo(AVCodec *codec, AVCodecContext *avctx, Ptr data, int bufferSize)
{
AVCodecContext *tmpContext;
AVFrame *tmpFrame;
int got_picture;
enum PixelFormat pix_fmt;
tmpContext = avcodec_alloc_context3(codec);
tmpFrame = avcodec_alloc_frame();
avcodec_copy_context(tmpContext, avctx);
if (avcodec_open2(tmpContext, codec, NULL)) {
pix_fmt = PIX_FMT_NONE;
goto bail;
}
AVPacket pkt;
av_init_packet(&pkt);
pkt.data = (UInt8*)data;
pkt.size = bufferSize;
avcodec_decode_video2(tmpContext, tmpFrame, &got_picture, &pkt);
pix_fmt = tmpContext->pix_fmt;
avcodec_close(tmpContext);
bail:
av_freep(&tmpContext);
av_freep(&tmpFrame);
return pix_fmt;
}
static void SetSkipLoopFilter(FFusionGlobals glob, AVCodecContext *avctx)
{
Boolean keyExists = FALSE;
int loopFilterSkip = CFPreferencesGetAppIntegerValue(CFSTR("SkipLoopFilter"), PERIAN_PREF_DOMAIN, &keyExists);
if(keyExists)
{
enum AVDiscard loopFilterValue = AVDISCARD_DEFAULT;
switch (loopFilterSkip) {
case 1:
loopFilterValue = AVDISCARD_NONREF;
break;
case 2:
loopFilterValue = AVDISCARD_BIDIR;
break;
case 3:
loopFilterValue = AVDISCARD_NONKEY;
break;
case 4:
loopFilterValue = AVDISCARD_ALL;
break;
default:
break;
}
avctx->skip_loop_filter = loopFilterValue;
FFusionDebugPrint("%p Preflight set skip loop filter to %d", glob, loopFilterValue);
}
}
// A list of codec types (mostly official Apple codecs) which always have DTS info.
// This is the wrong way to do it, instead we should check for a ctts atom directly.
// This way causes files to play frames out of order if we guess wrong. Doesn't seem
// possible to do it right, though.
FFusionPacked DefaultPackedTypeForCodec(OSType codec)
{
switch (codec) {
case kMPEG1VisualCodecType:
case kMPEG2VisualCodecType:
case 'hdv1':
case kMPEG4VisualCodecType:
case kH264CodecType:
return PACKED_QUICKTIME_KNOWS_ORDER;
default:
return PACKED_ALL_IN_FIRST_FRAME;
}
}
void setFutureFrame(FFusionGlobals glob, FFusionBuffer *newFuture)
{
FFusionBuffer *temp = glob->decode.futureBuffer;
if(newFuture != NULL)
retainBuffer(glob, newFuture);
glob->decode.futureBuffer = newFuture;
if(temp != NULL)
releaseBuffer(glob->avContext, temp->frame);
}
//---------------------------------------------------------------------------
// Component Routines
//---------------------------------------------------------------------------
// -- This Image Decompressor Use the Base Image Decompressor Component --
// The base image decompressor is an Apple-supplied component
// that makes it easier for developers to create new decompressors.
// The base image decompressor does most of the housekeeping and
// interface functions required for a QuickTime decompressor component,
// including scheduling for asynchronous decompression.
//-----------------------------------------------------------------
// Component Open Request - Required
//-----------------------------------------------------------------
pascal ComponentResult FFusionCodecOpen(FFusionGlobals glob, ComponentInstance self)
{
ComponentResult err;
ComponentDescription descout;
GetComponentInfo((Component)self, &descout, 0, 0, 0);
// FourCCprintf("Opening component for type ", descout.componentSubType);
// Allocate memory for our globals, set them up and inform the component manager that we've done so
glob = (FFusionGlobals)NewPtrClear(sizeof(FFusionGlobalsRecord));
if ((err = MemError()))
{
Codecprintf(NULL, "Unable to allocate globals! Exiting.\n");
}
else
{
CFStringRef pathToLogFile = CopyPreferencesValueTyped(CFSTR("DebugLogFile"), CFStringGetTypeID());
char path[PATH_MAX];
SetComponentInstanceStorage(self, (Handle)glob);
glob->self = self;
glob->target = self;
glob->drawBandUPP = NULL;
glob->pixelTypes = NewHandleClear((kNumPixelFormatsSupportedFFusion+1) * sizeof(OSType));
glob->avCodec = 0;
glob->componentType = descout.componentSubType;
glob->data.frames = NULL;
glob->begin.parser = NULL;
if (pathToLogFile) {
CFStringGetCString(pathToLogFile, path, PATH_MAX, kCFStringEncodingUTF8);
CFRelease(pathToLogFile);
glob->fileLog = fopen(path, "a");
}
// Open and target an instance of the base decompressor as we delegate
// most of our calls to the base decompressor instance
err = OpenADefaultComponent(decompressorComponentType, kBaseCodecType, &glob->delegateComponent);
if (!err)
{
ComponentSetTarget(glob->delegateComponent, self);
}
else
{
Codecprintf(glob->fileLog, "Error opening the base image decompressor! Exiting.\n");
}
// we allocate some space for copying the frame data since we need some padding at the end
// for ffmpeg's optimized bitstream readers. Size doesn't really matter, it'll grow if need be
FFusionDataSetup(&(glob->data), 256, 1024*1024);
FFusionRunUpdateCheck();
}
FFusionDebugPrint("%p opened for '%s'\n", glob, FourCCString(glob->componentType));
return err;
}
//-----------------------------------------------------------------
// Component Close Request - Required
//-----------------------------------------------------------------
pascal ComponentResult FFusionCodecClose(FFusionGlobals glob, ComponentInstance self)
{
FFusionDebugPrint("%p closed.\n", glob);
DumpFrameDropStats(glob);
// Make sure to close the base component and deallocate our storage
if (glob)
{
if (glob->delegateComponent)
{
CloseComponent(glob->delegateComponent);
}
if (glob->drawBandUPP)
{
DisposeImageCodecMPDrawBandUPP(glob->drawBandUPP);
}
setFutureFrame(glob, NULL);
if (glob->avContext)
{
if (glob->avContext->extradata)
free(glob->avContext->extradata);
if (glob->avContext->codec) avcodec_close(glob->avContext);
av_free(glob->avContext);
}
if (glob->begin.parser)
{
ffusionParserFree(glob->begin.parser);
}
if (glob->pixelTypes)
{
DisposeHandle(glob->pixelTypes);
}
CCCloseConverter(&glob->colorConv);
FFusionDataFree(&(glob->data));
if(glob->fileLog)
fclose(glob->fileLog);
memset(glob, 0, sizeof(FFusionGlobalsRecord));
DisposePtr((Ptr)glob);
}
return noErr;
}
//-----------------------------------------------------------------
// Component Version Request - Required
//-----------------------------------------------------------------
pascal ComponentResult FFusionCodecVersion(FFusionGlobals glob)
{
return kFFusionCodecVersion;
}
//-----------------------------------------------------------------
// Component Target Request
//-----------------------------------------------------------------
// Allows another component to "target" you i.e., you call
// another component whenever you would call yourself (as a result
// of your component being used by another component)
//-----------------------------------------------------------------
pascal ComponentResult FFusionCodecTarget(FFusionGlobals glob, ComponentInstance target)
{
glob->target = target;
return noErr;
}
//-----------------------------------------------------------------
// Component GetMPWorkFunction Request
//-----------------------------------------------------------------
// Allows your image decompressor component to perform asynchronous
// decompression in a single MP task by taking advantage of the
// Base Decompressor. If you implement this selector, your DrawBand
// function must be MP-safe. MP safety means not calling routines
// that may move or purge memory and not calling any routines which
// might cause 68K code to be executed. Ideally, your DrawBand
// function should not make any API calls whatsoever. Obviously
// don't implement this if you're building a 68k component.
//-----------------------------------------------------------------
pascal ComponentResult FFusionCodecGetMPWorkFunction(FFusionGlobals glob, ComponentMPWorkFunctionUPP *workFunction, void **refCon)
{
if (glob->drawBandUPP == NULL)
glob->drawBandUPP = NewImageCodecMPDrawBandUPP((ImageCodecMPDrawBandProcPtr)FFusionCodecDrawBand);
return ImageCodecGetBaseMPWorkFunction(glob->delegateComponent, workFunction, refCon, glob->drawBandUPP, glob);
}
//-----------------------------------------------------------------
// ImageCodecInitialize
//-----------------------------------------------------------------
// The first function call that your image decompressor component
// receives from the base image decompressor is always a call to
// ImageCodecInitialize . In response to this call, your image
// decompressor component returns an ImageSubCodecDecompressCapabilities
// structure that specifies its capabilities.
//-----------------------------------------------------------------
pascal ComponentResult FFusionCodecInitialize(FFusionGlobals glob, ImageSubCodecDecompressCapabilities *cap)
{
// Secifies the size of the ImageSubCodecDecompressRecord structure
// and say we can support asyncronous decompression
// With the help of the base image decompressor, any image decompressor
// that uses only interrupt-safe calls for decompression operations can
// support asynchronous decompression.
cap->decompressRecordSize = sizeof(FFusionDecompressRecord) + 12;
cap->canAsync = true;
// QT 7
if(cap->recordSize > offsetof(ImageSubCodecDecompressCapabilities, baseCodecShouldCallDecodeBandForAllFrames))
{
cap->subCodecIsMultiBufferAware = true;
cap->subCodecSupportsOutOfOrderDisplayTimes = true;
cap->baseCodecShouldCallDecodeBandForAllFrames = false;
cap->subCodecSupportsScheduledBackwardsPlaybackWithDifferenceFrames = true;
cap->subCodecSupportsDrawInDecodeOrder = true;
cap->subCodecSupportsDecodeSmoothing = true;
}
return noErr;
}
static inline int shouldDecode(FFusionGlobals glob, enum CodecID codecID)
{
FFusionDecodeAbilities decode = FFUSION_PREFER_DECODE;
if (glob->componentType == 'avc1')
decode = ffusionIsParsedVideoDecodable(glob->begin.parser);
if(decode > FFUSION_CANNOT_DECODE &&
(codecID == CODEC_ID_H264 || codecID == CODEC_ID_MPEG4) && CFPreferencesGetAppBooleanValue(CFSTR("PreferAppleCodecs"), PERIAN_PREF_DOMAIN, NULL))
decode = FFUSION_PREFER_NOT_DECODE;
if(decode > FFUSION_CANNOT_DECODE)
if(IsForcedDecodeEnabled())
decode = FFUSION_PREFER_DECODE;
return decode > FFUSION_PREFER_NOT_DECODE;
}
//-----------------------------------------------------------------
// ImageCodecPreflight
//-----------------------------------------------------------------
// The base image decompressor gets additional information about the
// capabilities of your image decompressor component by calling
// ImageCodecPreflight. The base image decompressor uses this
// information when responding to a call to the ImageCodecPredecompress
// function, which the ICM makes before decompressing an image. You
// are required only to provide values for the wantedDestinationPixelSize
// and wantedDestinationPixelTypes fields and can also modify other
// fields if necessary.
//-----------------------------------------------------------------
pascal ComponentResult FFusionCodecPreflight(FFusionGlobals glob, CodecDecompressParams *p)
{
OSType *pos;
int index;
CodecCapabilities *capabilities = p->capabilities;
int count = 0;
Handle imgDescExt;
OSErr err = noErr;
// We first open libavcodec library and the codec corresponding
// to the fourCC if it has not been done before
FFusionDebugPrint("%p Preflight called.\n", glob);
FFusionDebugPrint("%p Frame dropping is %senabled\n", glob, not(IsFrameDroppingEnabled()));
if (!glob->avCodec)
{
FFInitFFmpeg();
initFFusionParsers();
OSType componentType = glob->componentType;
enum CodecID codecID = getCodecID(componentType);
glob->packedType = DefaultPackedTypeForCodec(componentType);
if(codecID == CODEC_ID_NONE)
{
Codecprintf(glob->fileLog, "Warning! Unknown codec type! Using MPEG4 by default.\n");
codecID = CODEC_ID_MPEG4;
}
glob->avCodec = avcodec_find_decoder(codecID);
// if(glob->packedType != PACKED_QUICKTIME_KNOWS_ORDER)
glob->begin.parser = ffusionParserInit(codecID);
if ((codecID == CODEC_ID_MPEG4 || codecID == CODEC_ID_H264) && !glob->begin.parser)
Codecprintf(glob->fileLog, "This is a parseable format, but we couldn't open a parser!\n");
// we do the same for the AVCodecContext since all context values are
// correctly initialized when calling the alloc function
glob->avContext = avcodec_alloc_context3(glob->avCodec);
// Use low delay
glob->avContext->flags |= CODEC_FLAG_LOW_DELAY;
// Image size is mandatory for DivX-like codecs
glob->avContext->width = (**p->imageDescription).width;
glob->avContext->height = (**p->imageDescription).height;
glob->avContext->bits_per_coded_sample = (**p->imageDescription).depth;
// We also pass the FourCC since it allows the H263 hybrid decoder
// to make the difference between the various flavours of DivX
glob->avContext->codec_tag = Endian32_Swap(glob->componentType);
glob->avContext->codec_id = codecID;
// avc1 requires the avcC extension
if (glob->componentType == 'avc1') {
count = isImageDescriptionExtensionPresent(p->imageDescription, 'avcC');
if (count >= 1) {
imgDescExt = NewHandle(0);
GetImageDescriptionExtension(p->imageDescription, &imgDescExt, 'avcC', 1);
glob->avContext->extradata = calloc(1, GetHandleSize(imgDescExt) + FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(glob->avContext->extradata, *imgDescExt, GetHandleSize(imgDescExt));
glob->avContext->extradata_size = GetHandleSize(imgDescExt);
DisposeHandle(imgDescExt);
} else {
count = isImageDescriptionExtensionPresent(p->imageDescription, 'strf');
// avc1 in AVI, need to reorder frames
if (count >= 1)
glob->packedType = PACKED_ALL_IN_FIRST_FRAME;
}
} else if (glob->componentType == 'mp4v') {
count = isImageDescriptionExtensionPresent(p->imageDescription, 'esds');
if (count >= 1) {
imgDescExt = NewHandle(0);
GetImageDescriptionExtension(p->imageDescription, &imgDescExt, 'esds', 1);
ReadESDSDescExt(imgDescExt, &glob->avContext->extradata, &glob->avContext->extradata_size);
DisposeHandle(imgDescExt);
}
} else if (glob->componentType == kVideoFormatTheora) {
count = isImageDescriptionExtensionPresent(p->imageDescription, kVideoFormatTheora);
if (count >= 1) {
imgDescExt = NewHandle(0);
GetImageDescriptionExtension(p->imageDescription, &imgDescExt, kVideoFormatTheora, 1);
glob->avContext->extradata = calloc(1, GetHandleSize(imgDescExt) + FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(glob->avContext->extradata, *imgDescExt, GetHandleSize(imgDescExt));
glob->avContext->extradata_size = GetHandleSize(imgDescExt);
DisposeHandle(imgDescExt);
}
} else {
count = isImageDescriptionExtensionPresent(p->imageDescription, 'strf');
if (count >= 1) {
imgDescExt = NewHandle(0);
GetImageDescriptionExtension(p->imageDescription, &imgDescExt, 'strf', 1);
if (GetHandleSize(imgDescExt) - 40 > 0) {
glob->avContext->extradata = calloc(1, GetHandleSize(imgDescExt) - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(glob->avContext->extradata, *imgDescExt + 40, GetHandleSize(imgDescExt) - 40);
glob->avContext->extradata_size = GetHandleSize(imgDescExt) - 40;
}
DisposeHandle(imgDescExt);
}
}
FFusionDebugPrint("%p preflighted for %dx%d '%s'. (%d bytes of extradata)\n", glob, glob->avContext->width, glob->avContext->height, FourCCString(glob->componentType), glob->avContext->extradata_size);
if(glob->avContext->extradata_size != 0 && glob->begin.parser != NULL) {
if (!ffusionParseExtraData(glob->begin.parser, glob->avContext->extradata, glob->avContext->extradata_size))
err = featureUnsupported;
}
if (glob->fileLog)
ffusionLogDebugInfo(glob->begin.parser, glob->fileLog);
if (!shouldDecode(glob, codecID))
err = featureUnsupported;
// some hooks into ffmpeg's buffer allocation to get frames in
// decode order without delay more easily
glob->avContext->opaque = glob;
glob->avContext->get_buffer = FFusionGetBuffer;
glob->avContext->release_buffer = FFusionReleaseBuffer;
// cap threads at a smaller number to be polite
glob->avContext->thread_count = 2;
// deblock skipping for h264
SetSkipLoopFilter(glob, glob->avContext);
//fast flag
if (CFPreferencesGetAppBooleanValue(CFSTR("UseFastDecode"), PERIAN_PREF_DOMAIN, NULL))
glob->avContext->flags2 |= CODEC_FLAG2_FAST;
// Finally we open the avcodec
if (avcodec_open2(glob->avContext, glob->avCodec, NULL))
{
Codecprintf(glob->fileLog, "Error opening avcodec!\n");
err = paramErr;
}
// codec was opened, but didn't give us its pixfmt
// we have to decode the first frame to find out one
else if (glob->avContext->pix_fmt == PIX_FMT_NONE && p->bufferSize && p->data) {
glob->avContext->pix_fmt = FindPixFmtFromVideo(glob->avCodec, glob->avContext, p->data, p->bufferSize);
// first frame is invalid so we still have no pixfmt
if (glob->avContext->pix_fmt == PIX_FMT_NONE)
err = paramErr;
}
}
// Specify the minimum image band height supported by the component
// bandInc specifies a common factor of supported image band heights -
// if your component supports only image bands that are an even
// multiple of some number of pixels high report this common factor in bandInc
capabilities->bandMin = (**p->imageDescription).height;
capabilities->bandInc = capabilities->bandMin;
// libavcodec 0.4.x is no longer stream based i.e. you cannot pass just
// an arbitrary amount of data to the library.
// Instead we have to tell QT to just pass the data corresponding
// to one frame
capabilities->flags |= codecWantsSpecialScaling;
p->requestedBufferWidth = (**p->imageDescription).width;
p->requestedBufferHeight = (**p->imageDescription).height;
// Indicate the pixel depth the component can use with the specified image
// normally should be capabilities->wantedPixelSize = (**p->imageDescription).depth;
// but we don't care since some DivX are so bugged that the depth information
// is not correct
capabilities->wantedPixelSize = 0;
pos = *((OSType **)glob->pixelTypes);
index = 0;
if (!err) {
OSType qtPixFmt = FFPixFmtToFourCC(CCOutputPixFmtForInput(glob->avContext->pix_fmt));
/*
an error here means either
1) a color converter for this format isn't implemented
2) we know QT doesn't like this format and will give us argb 32bit instead
in the case of 2 we have to special-case bail right here, since errors
in BeginBand are ignored
*/
if (qtPixFmt)
pos[index++] = qtPixFmt;
else
err = featureUnsupported;
}
p->wantedDestinationPixelTypes = (OSType **)glob->pixelTypes;
// Specify the number of pixels the image must be extended in width and height if
// the component cannot accommodate the image at its given width and height
// It is not the case here
capabilities->extendWidth = 0;
capabilities->extendHeight = 0;
capabilities->flags |= codecCanAsync | codecCanAsyncWhen;
FFusionDebugPrint("%p Preflight requesting colorspace '%s'. (error %d)\n", glob, FourCCString(pos[0]), err);
return err;
}
static int qtTypeForFrameInfo(int original, int fftype, int skippable)
{
if(fftype == FF_I_TYPE)
{
if(!skippable)
return kCodecFrameTypeKey;
}
else if(skippable && IsFrameDroppingEnabled())
return kCodecFrameTypeDroppableDifference;
else if(fftype != 0)
return kCodecFrameTypeDifference;
return original;
}
//-----------------------------------------------------------------
// ImageCodecBeginBand
//-----------------------------------------------------------------
// The ImageCodecBeginBand function allows your image decompressor
// component to save information about a band before decompressing
// it. This function is never called at interrupt time. The base
// image decompressor preserves any changes your component makes to
// any of the fields in the ImageSubCodecDecompressRecord or
// CodecDecompressParams structures. If your component supports
// asynchronous scheduled decompression, it may receive more than
// one ImageCodecBeginBand call before receiving an ImageCodecDrawBand
// call.
//-----------------------------------------------------------------
pascal ComponentResult FFusionCodecBeginBand(FFusionGlobals glob, CodecDecompressParams *p, ImageSubCodecDecompressRecord *drp, long flags)
{
FFusionDecompressRecord *myDrp = (FFusionDecompressRecord *)drp->userDecompressRecord;
int redisplayFirstFrame = 0;
int type = 0;
int skippable = 0;
myDrp->decoded = p->frameTime ? (0 != (p->frameTime->flags & icmFrameAlreadyDecoded)) : false;
myDrp->frameData = NULL;
myDrp->buffer = NULL;
FFusionDebugPrint("%p BeginBand #%ld. (%sdecoded, packed %d)\n", glob, p->frameNumber, not(myDrp->decoded), glob->packedType);
if (!glob->avContext) {
Codecprintf(glob->fileLog, "Perian: QT tried to call BeginBand without preflighting!\n");
return internalComponentErr;
}
if (p->frameNumber <= 1 && p->dstPixMap.pixelFormat != **(OSType**)glob->pixelTypes) {
Codecprintf(NULL, "QT gave us unwanted pixelFormat %s (%08x), this will not work\n", FourCCString(p->dstPixMap.pixelFormat), (unsigned)p->dstPixMap.pixelFormat);
}
if(myDrp->decoded)
{
int i;
myDrp->frameNumber = p->frameNumber;
for (i = 0; i < FFUSION_MAX_BUFFERS; i++) {
if (glob->buffers[i].retainCount && glob->buffers[i].frameNumber == myDrp->frameNumber) {
myDrp->buffer = retainBuffer(glob, &glob->buffers[i]);
break;
}
}
return noErr;
}
if(glob->packedType != PACKED_QUICKTIME_KNOWS_ORDER && p->frameNumber != glob->begin.lastFrame + 1)
{
if(glob->decode.lastFrame < p->frameNumber && p->frameNumber < glob->begin.lastFrame + 1)
{
/* We already began this sucker, but haven't decoded it yet, find the data */
FrameData *frameData = NULL;
frameData = FFusionDataFind(&glob->data, p->frameNumber);
if(frameData != NULL)
{
myDrp->frameData = frameData;
drp->frameType = qtTypeForFrameInfo(drp->frameType, myDrp->frameData->type, myDrp->frameData->skippabble);
myDrp->frameNumber = p->frameNumber;
myDrp->GOPStartFrameNumber = glob->begin.lastIFrame;
return noErr;
}
}
else
{
/* Reset context, safe marking in such a case */
glob->begin.lastFrameType = FF_I_TYPE;
FFusionDataReadUnparsed(&(glob->data));
glob->begin.lastPFrameData = NULL;
redisplayFirstFrame = 1;
}
}
if(glob->begin.parser != NULL)
{
int parsedBufSize = 0;
uint8_t *buffer = (uint8_t *)drp->codecData;
int bufferSize = p->bufferSize;
int skipped = 0;
if(glob->data.unparsedFrames.dataSize != 0)
{
buffer = glob->data.unparsedFrames.buffer;
bufferSize = glob->data.unparsedFrames.dataSize;
}
if(ffusionParse(glob->begin.parser, buffer, bufferSize, &parsedBufSize, &type, &skippable, &skipped) == 0 && (!skipped || glob->begin.futureType))
{
/* parse failed */
myDrp->bufferSize = bufferSize;
if(glob->begin.futureType != 0)
{
/* Assume our previously decoded P frame */
type = glob->begin.futureType;
glob->begin.futureType = 0;
myDrp->frameData = glob->begin.lastPFrameData;
}
else
{
Codecprintf(glob->fileLog, "parse failed frame %ld with size %d\n", p->frameNumber, bufferSize);
if(glob->data.unparsedFrames.dataSize != 0)
Codecprintf(glob->fileLog, ", parser had extra data\n");
}
}
else if(glob->packedType != PACKED_QUICKTIME_KNOWS_ORDER)
{
if(type == FF_B_TYPE && glob->packedType == PACKED_ALL_IN_FIRST_FRAME && glob->begin.futureType == 0)
/* Badly framed. We hit a B frame after it was supposed to be displayed, switch to delaying by a frame */
glob->packedType = PACKED_DELAY_BY_ONE_FRAME;
else if(glob->packedType == PACKED_DELAY_BY_ONE_FRAME && parsedBufSize < bufferSize - 16)
/* Seems to be switching back to packed in one frame; switch back*/
glob->packedType = PACKED_ALL_IN_FIRST_FRAME;
myDrp->frameData = FFusionDataAppend(&(glob->data), buffer, parsedBufSize, type);
if(type != FF_I_TYPE)
myDrp->frameData->prereqFrame = glob->begin.lastPFrameData;
if(glob->packedType == PACKED_DELAY_BY_ONE_FRAME)
{
if(type != FF_B_TYPE)
{
FrameData *nextPFrame = myDrp->frameData;
FrameData *lastPFrame = glob->begin.lastPFrameData;
if(lastPFrame != NULL)
/* Mark the next P or I frame, predictive decoding */
lastPFrame->nextFrame = nextPFrame;
myDrp->frameData = lastPFrame;
glob->begin.lastPFrameData = nextPFrame;
if(redisplayFirstFrame)
myDrp->frameData = nextPFrame;
}
int displayType = glob->begin.lastFrameType;
glob->begin.lastFrameType = type;
type = displayType;
}
else if(type != FF_B_TYPE)
glob->begin.lastPFrameData = myDrp->frameData;
if(type == FF_I_TYPE && glob->packedType == PACKED_ALL_IN_FIRST_FRAME)
/* Wipe memory of past P frames */
glob->begin.futureType = 0;
if(parsedBufSize < p->bufferSize)
{
int oldType = type;
buffer += parsedBufSize;
bufferSize -= parsedBufSize;
int success = ffusionParse(glob->begin.parser, buffer, bufferSize, &parsedBufSize, &type, &skippable, &skipped);
if(success && type == FF_B_TYPE)
{
/* A B frame follows us, so setup the P frame for the future and set dependencies */
glob->begin.futureType = oldType;
if(glob->begin.lastPFrameData != NULL)
/* Mark the next P or I frame, predictive decoding */
glob->begin.lastPFrameData->nextFrame = myDrp->frameData;
glob->begin.lastPFrameData = myDrp->frameData;
myDrp->frameData = FFusionDataAppend(&(glob->data), buffer, parsedBufSize, type);
myDrp->frameData->prereqFrame = glob->begin.lastPFrameData;
buffer += parsedBufSize;
bufferSize -= parsedBufSize;
}